CN106536913A - Fuel system for internal combustion engine and a method to lessen pressure fluctuations in a fuel filter device in a fuel system - Google Patents
Fuel system for internal combustion engine and a method to lessen pressure fluctuations in a fuel filter device in a fuel system Download PDFInfo
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- CN106536913A CN106536913A CN201580035201.8A CN201580035201A CN106536913A CN 106536913 A CN106536913 A CN 106536913A CN 201580035201 A CN201580035201 A CN 201580035201A CN 106536913 A CN106536913 A CN 106536913A
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- combustion engine
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- control valve
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D33/00—Controlling delivery of fuel or combustion-air, not otherwise provided for
- F02D33/003—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge
- F02D33/006—Controlling the feeding of liquid fuel from storage containers to carburettors or fuel-injection apparatus ; Failure or leakage prevention; Diagnosis or detection of failure; Arrangement of sensors in the fuel system; Electric wiring; Electrostatic discharge depending on engine operating conditions, e.g. start, stop or ambient conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
- F02D41/065—Introducing corrections for particular operating conditions for engine starting or warming up for starting at hot start or restart
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
- F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0023—Valves in the fuel supply and return system
- F02M37/0029—Pressure regulator in the low pressure fuel system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
- F02M37/0041—Means for damping pressure pulsations
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/06—Feeding by means of driven pumps mechanically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/18—Feeding by means of driven pumps characterised by provision of main and auxiliary pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
- F02M37/46—Filters structurally associated with pressure regulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
The invention relates to a fuel system (4) for an internal combustion engine (2), which fuel system (4) comprises a first fuel tank (20), a fuel filter device (12), arranged between a low pressure pump (22) operated by an electric motor and a high pressure pump (14), and a first fuel conduit (24), through which the low pressure pump (22) is arranged to supply fuel to the fuel filter device (12). Furthermore, a gradually opening and/or closing control valve (30), which opens and/or closes at a predetermined pressure, is arranged upstream of the fuel filter device (12). A recirculation conduit (32) is arranged upstream of the control valve and downstream of the low pressure pump (22), for recirculation of fuel back to the low pressure pump (22), at a supply pressure which exceeds the predetermined opening pressure of the control valve (30). Thanks to the invention, the risk of major pressure fluctuations in the fuel filter device (12) may be reduced. The invention also relates to an internal combustion engine (2) comprising such a fuel system (4), a vehicle (1) comprising such a fuel system (4) and a method to lessen pressure fluctuations in the fuel filter device (12) in such a fuel system (4).
Description
Technical field
The present invention relates to be used for the fuel system of internal combustion engine, the internal combustion engine with the fuel system, with the fuel
The method of the pressure oscillation in fuel filtration in the vehicle and mitigation fuel system of system.
Background technology
Combustion engine (such as Diesel engine or Otto formula engine) is for current polytype equipment and vehicle
In, such as in heavy goods stock, in such as truck or bus, passenger car, power ship, passenger steamer, ferry boat and cargo ship.Combustion is sent out
Motivation is additionally operable in industrial engine and/or engine-driven industrial robot, power-equipment is (such as including diesel-driven generator
Power plant) in, and locomotive in.
Combustion engine can pass through diesel oil, gasoline or ethanol or other kinds of bio-fuel drives.Such
Motivation is equipped with fuel system so that fuel to be transported to the spraying system of internal combustion engine from one or more fuel reservoirs.Fuel system
Including can mechanically be driven by internal combustion engine, or by motor-driven one or more petrolifts.Petrolift is produced
, to deliver fuel into the spraying system of internal combustion engine, the spraying system supplies fuel to the combustion of internal combustion engine for The fuel stream and pressure
Burn room.
Fuel system also includes fuel filter, to filter fuel before the spraying system of fuel arrival internal combustion engine.It is interior
Combustion engine and its spraying system are sensitive to impurity and may become negatively affected in the case where fuel excessively pollutes.Impurity can be with
Mean solid particle, gas or liquid.
Some combustion engines or hybrid power engine can be closed when vehicle stops, for example at red light or traffic congestion
Middle closing, it is therefore an objective to reduce fuel consumption and exhaust emissions.This function causes internal combustion engine frequent starting and stopping.Work as internal combustion engine
During closing, the pressure in fuel system drastically declines, because fuel no longer needs to be fed into internal combustion engine.On the other hand, internal combustion
Each startup of machine needs pressure is set up rapidly in fuel system, so that fuel is sufficiently fed internal combustion engine rapidly.Cause
This, the frequent starting/stopping of internal combustion engine causes the frequent pressure oscillation in fuel system, therefore also results in fuel filter
Frequently pressure oscillation.During the startup of internal combustion engine, the pressure for being formed increases in fuel system, and fuel is so as under high pressure
Supply via fuel filter.High pressure causes the impurity in fuel be forced through the risk of filter, and this may affect
The function of spraying system and internal combustion engine.Even if only a small amount of impurity reaches internal combustion engine, it is also possible to which producing internal combustion engine possibly cannot lead to
Cross the consequence of fuel driven.Additionally, there are pressure oscillation and high pressure that fuel filter often occurs in systems because of Jing
And risk that is impaired or disintegrating.Impurity may reach the impaired risk of risk and fuel filter of internal combustion engine with fuel mistake
Filter is subject to the frequency of affected by high and increases.Therefore desirable for mitigating the pressure oscillation in fuel filter.
Propose different method and systems in the prior art to control the pressure in fuel system.US
2013047965 illustrate fuel system, and wherein tail-off still open and continue to supply fuel by petrolift.The fuel stream and
Pressure can under specific circumstances, control by means of check-valves and excess pressure valve for example in vehicle cold-start.However, the document
The problem of pressure oscillation when not referring in repeated priming and stopping in fuel filter.
Although there is the solution of prior art in the art, still suffer from further developing the need of fuel system
Ask, the fuel system contributes to mitigating the pressure oscillation in the fuel filter in the fuel system for internal combustion engine, and
The fuel system is so as to the risk minimization that fuel filter and internal combustion engine will be made impaired.
The content of the invention
The purpose of the present invention is to realize the fuel system for internal combustion engine, and the fuel system mitigates the combustion in fuel system
Pressure oscillation in material filter.
The present invention also aims to realize the fuel system for internal combustion engine, the fuel system is by the behaviour in internal combustion engine
The risk minimization that work interrupts.
It is another object of the present invention to realize the fuel system for internal combustion engine, the fuel system is by fuel system
The risk minimization of the operation disruption in fuel filter.
The present invention also aims to realize the fuel system for internal combustion engine, the fuel system is compact and saves empty
Between.
It is another object of the present invention to realize mitigating the pressure oscillation in the fuel filter in the fuel system of internal combustion engine
Method.These purposes using the fuel system for limiting in claim 1 and the mitigation that limits in claim 12
The method of the pressure oscillation in fuel filter in fuel system is realized.
According to the present invention, these purposes utilize the fuel system for internal combustion engine to realize that the fuel system includes：First
Fuel reservoir；Fuel filtration, the fuel filtration are arranged between the low-lift pump by motor operation and high-pressure pump；
And first fuel channel, low-lift pump is arranged to for fuel to be supplied to fuel filtration by first fuel channel.
Under predetermined pressure open and/or close gradually open and/or gradually enclosed control valve be arranged on fuel filtration upstream.Recirculation pipe
Road is arranged on control valve upstream and low-lift pump downstream, for making fuel that low-lift pump, the confession are recycled back under supply pressure
Exceed the predetermined opening pressure in control valve to pressure.
The invention further relates to including the internal combustion engine and vehicle of the system being described above.
According on the other hand, the present invention relates to mitigate the pressure in the fuel filtration in the fuel system for internal combustion engine
The method of fluctuation, the fuel system include：First fuel reservoir；Fuel filtration, which is arranged on low-lift pump and high pressure
Between pump；And first fuel channel, low-lift pump is arranged to for fuel to be supplied to fuel filter by first fuel channel
Device.The method comprising the steps of：
A) control valve is arranged on into fuel filtration upstream and low-lift pump downstream, to control to lead to fuel filtration
The fuel stream；
B) control control valve, so that the control valve is gradually opened under a predetermined；And
C) make a part of fuel under more than the pressure for the predetermined opening pressure that controls valve via recirculation conduit again
It is circulated back to low-lift pump.
It is described in the concrete detailed description of the supplementary features and advantage of the present invention present invention hereinafter.
The concrete detailed description of the present invention
The present invention is described hereinafter with reference to the fuel system and method being generally described above.
When internal combustion engine cuts out, no fuel requirement is fed into internal combustion engine.By the engine speed operation of internal combustion engine
Pump be also turned off when internal combustion engine cuts out.Thus, low-lift pump and high-pressure pump are turned off, and under the pressure in fuel system
Drop.When internal combustion engine is again started up, needs set up rapidly pressure in fuel system, to allow to be sufficiently fed fuel
Internal combustion engine.Next low-lift pump must realize high engine speed or towards high engine speed control, so as to utilize fill
High pressure is divided to supply it to by fuel filtration.Internal combustion engine starts every time, and such pressure oscillation is occurred as soon as, the pressure
Fluctuation is also known as compression shock or pulsation.Such high pressure may cause impurity to be forced through fuel filtration and enter
One step is pushed to internal combustion engine, and this may cause the shutdown of internal combustion engine.Additionally, fuel is fed through fuel filtration institute profit
High pressure may damage fuel filtration.If internal combustion engine is frequently turned off and on, fuel filtration can more frequency
It is numerous by affected by high, and in fuel filtration these frequently pressure oscillation fuel filtration is made so as to increase
The risk of operation disruption may be caused into the risk of infringement, and impurity.
According to the present invention, eased off the pressure fluctuation using system and method, wherein involute control valve is arranged on fuel filter
Device upstream and low-lift pump downstream, to control to lead to the The fuel stream of fuel filtration.Control valve is opened under a predetermined
And/or close.By this way, fuel supply can be controlled such that control valve sending out until internal combustion engine and/or low-lift pump
Motivation speed is just opened when having exceeded particular value, so that fuel pressure or flowing are in appropriate level.Pressure sensor can be with
It is arranged in control valve downstream and/or control valve.Pressure sensor may be coupled to the control device in vehicle, the opening of valve
And/or close and can be controlled by control device.
Recirculation conduit is arranged on control valve upstream and low-lift pump downstream, for making fuel be recirculated back under supply pressure
To low-lift pump, the supply pressure is more than the predetermined opening pressure in control valve.By this way, fuel is continually fed into
Fuel filtration, compression shock can be avoided in such as engine start.By way of involute controls valve, pressure
Gradually increase in power is realized in fuel filtration.Control valve can be mechanical valve or motor-driven valve.The fuel of pressurization is preferred
Always can use in fuel filtration, control valve also works as check-valves, prevents fuel from flowing back into low-lift pump.
According to the present invention, low-lift pump is preferably mechanically operated.By arranging by internal combustion engine and especially by interior
The engine speed operation of combustion engine and the mechanical pump of control, low-lift pump are controlled in a simple manner decoupled.Low-lift pump starts so as to direction
Motor speed is controlled, so that low-lift pump provides height under the high engine speed of internal combustion engine, for example when engine starts rapidly
Flow and so as to provide high pressure, and low flowing is provided at low engine speeds and therefore low pressure is provided.Thus, low pressure
Pump is cut out when internal combustion engine cuts out.In generally having in the low-lift pump in wider control interval, in internal combustion engine by motor operation
Startup when high flowing may further result in high pressure in system and therefore the high pressure that causes in fuel filtration.This meaning
, repeated priming and when stopping be under pressure influence of fluctuations of the fuel in internal combustion engine.By arranging the control valve being gradually opened, combustion
Material filter can continuously be pressurizeed during engine start.At the same time, a part of fuel is via recirculation conduit quilt
Low-lift pump is led back to, so that control valve is not affected by excess pressure.By this way, occur in internal combustion engine start
Pressure oscillation in fuel filtration is mitigated.Therefore, impurity may be forced through fuel filtration and cause
The risk minimization of operation disruption.Additionally, fuel filtration due to it is big and frequently pressure oscillation and may be damaged or disintegrate
Risk minimization.
According to an aspect of the present invention, accumulator is arranged on control valve downstream and is connected with fuel filtration.Store
The purpose of depressor is by fuel filtration in the case of engine failure and before fuel supply starts from low-lift pump
Pressurization.Constantly pressurizeed due to fuel filtration, the pressure oscillation in fuel filter is further mitigated.Pressure accumulation
Device is arranged to will combustion after stall when needing for fuel to be rapidly provided internal combustion engine, for example when engine is in engine start
Material is discharged into fuel filtration.The fuel of pressurization is supplied to into fuel filter and leading to for internal combustion engine is further supplied to
Next open with the passage from accumulator.When control valve be completely open and low-lift pump rotating speed according to internal combustion engine
When demand for fuel is adapted to, lead to and from the pathway closure of accumulator.In turn, the pressure when internal combustion engine cuts out in system is fast
Fall under speed, the passage for leading to accumulator is opened and filled with fuel.By this way, pressure oscillation effectively can subtract
Gently.Valve gear is preferably provided at the porch for leading to accumulator, to control to lead to and from the flowing of accumulator.Valve can be with
Electrically control, as a result, it is possible to achieve the precise control of accumulator.The volume of accumulator can for example 0.1 to 1 liter it
Between.
According to a further aspect in the invention, fuel filtration is arranged to work as accumulator.It means that pressurization
Fuel can remain in fuel filtration.In this way it is possible to obtain simple and compact fuel system.
Control valve is preferably able to electrically control.In this manner it is achieved that accurate and rapidly control.Using electricity
Dynamic control, for example, easily change for controlling control interval gradually opened and/or gradually close of valve.Can also will control valve be arranged to
Control device and communication bus connection, therefore control the other control system that the control of valve may be coupled to vehicle.
Be respectively used to receive and sending signal the connector that can be made up of one or more cables of communication bus or
Wireless connections, the connector can be CAN (controller zone network), (system towards media is passed MOST buses
It is defeated), or some other kinds of bus structures.Control device could be for the independent control device for controlling valve, or alternatively,
Control device can be made up of the logic circuit in the control device for internal combustion engine.The other control systems of vehicle can also be anti-
Come over to be connected to same communication bus, such as CAN.Recirculation conduit can include the porch for being arranged on recirculation conduit
Valve gear.By this way, fuel recycling and therefore lead to control valve The fuel stream can towards expect rank control
System.The valve can be mechanical valve or motor-driven valve.
Control valve can be made up of the speed regulator of low-lift pump, the speed regulator from low-lift pump move to the first fuel channel,
Porch in fuel filtration is led to.In this way it is possible to the quantity of the part in system is minimized, while can
To obtain the precise control of The fuel stream.Control valve can be the mechanical valve with return valve function, such as diaphragm valve.Control valve is also
Can be can be electrically to control valve, such as magnetic valve, or any kind of motor-driven valve.
The invention further relates to including the internal combustion engine and vehicle of the system being described above.
The invention further relates to mitigate the side of the pressure oscillation in the fuel filtration in the fuel system for internal combustion engine
Method, the fuel system include：First fuel reservoir；Fuel filtration, which is arranged between low-lift pump and high-pressure pump；And
First fuel channel, low-lift pump are arranged to for fuel to be supplied to fuel filtration by first fuel channel, wherein institute
The method of stating is comprised the following steps：
A) control valve is arranged on into fuel filtration upstream and low-lift pump downstream, to control to lead to fuel filtration
The fuel stream；
B) control control valve, so which is gradually opened under a predetermined；And
C) make a part of fuel under more than the pressure for the predetermined opening pressure that controls valve via recirculation conduit again
It is circulated back to low-lift pump.
In step (b), control valve is controlled so which is opened under a predetermined.Controlling valve can be electrically to control
System, the opening of valve and/or closing can be adapted to current driving condition.Step (b) can also include via control device with electricity side
Formula control control valve, the control device are connected to control valve via communication bus.
Step c) can include valve gear being configured in the porch for leading to recirculation conduit.In this way it is possible to enter
One step controls The fuel stream, and obtains more precise control.
Methods described can be with further comprising the steps of：
D) accumulator is configured in the porch for leading to fuel filtration, so that fuel filtration is pressurizeed.With this
The mode of kind, fuel filtration are added when may be arranged so which is when low-lift pump is shut down, for example in engine breakdown
Pressure.
Fuel filtration preferably includes filter housing, and filter element is arranged in the filter housing.Work as internal combustion
When machine is in operation, fuel is supplied to filter housing via the first fuel channel from low-lift pump with specified pressure, next fires
Material is through filter element and impurity is filtered.Subsequently, fuel is further supplied to the injection of high-pressure pump and internal combustion engine
System.As a part of fuel is passed through via involute control valve, and as a part of fuel can also pass through recirculation conduit,
Fully open until controlling valve, specified pressure will be maintained in fuel filtration, and occur without any generally in internal combustion
The main pressure impact occurred when machine startup and stopping and pressure oscillation.Stress on filter element is so as to minimizing.
Pressure inside filter housing can be increased continuously by way of controlling the progressively closing off of valve.Filter housing
The accumulator for pressurizeing can be arranged to act as.When internal combustion engine is again started up, the fuel of pressurization will be present in outside filter
In shell, therefore fuel can reach rapidly internal combustion engine, and realize the rapid and efficient startup of internal combustion engine.Additionally, control valve
The pressure differential occurred in internal combustion engine start is minimized with the pressure in filter housing, this will receive will fuel filtration
The risk of damage and as pressure sharply increases the risk minimization for causing impurity to be forced through filter element.
According to an aspect of the present invention, fuel system includes the second fuel reservoir.First fuel reservoir is suitable to adaptation to be made
Obtain which and possess less volume compared with the second fuel reservoir.This design allows the first fuel reservoir small volume, and described the
One fuel reservoir is easier to be arranged on the inside chassis with the confined space.Thus, the fuel system of small size is achieved.
Delivery pump is preferably provided to supply fuel to the first fuel reservoir.Delivery pump is suitable to fuel from the second fuel reservoir
First fuel reservoir is supplied to further via the second fuel channel.Prefilter is preferably provided at delivery pump downstream and primary low
Pump upstream.The fuel of low-lift pump is reached so as to by pre-filtering, this causes low-lift pump that impurity is protected against in the way of advanced to enter
Enter, this reduces the risk of the operation disruption in low-lift pump.Delivery pump preferably passes through motor operation.By this way, it is more efficient and
The fuel supply for leading to the first fuel reservoir of flexible modulation is achieved.
Low-lift pump is suitable to be arranged in the first fuel reservoir.By this way, low-lift pump is protected from affected by environment, combustion
Material is able to the natural cooling in the first fuel reservoir.Alternatively, delivery pump and prefilter are additionally arranged in the first fuel reservoir
Portion.
Fuel return line is suitable to be arranged to be connected with the high-pressure system of the first fuel reservoir and fuel system.Pressurization
Warm fuel can return to the first fuel reservoir, rather than the combustion chamber for being transported to internal combustion engine by this way.Warm fuel can be from
And the cold fuel in fuel reservoir is heated, and reduce risk paraffinized during operation by this way.
Illustrate in the specific descriptions of the illustrative embodiments of other advantages of present invention present invention hereinafter.
Description of the drawings
As embodiment, the following is referring to the drawings for the description of the preferred embodiment of the present invention, wherein：
Fig. 1 illustrates the schematic side elevation of vehicle, and the vehicle includes the fuel system for internal combustion engine of the invention
System,
Fig. 2 illustrates the Mating graph for fuel system of the invention, and
Fig. 3 illustrates the stream of the method for the pressure oscillation in the fuel filtration mitigated in fuel system of the invention
Cheng Tu.
Specific embodiment
Fig. 1 illustrates the schematic side elevation of vehicle 1, and the vehicle includes the fuel for internal combustion engine of the invention 2
System 4.Internal combustion engine 2 is connected to gearbox 6, and the gearbox is connected further to the driving wheel 8 of vehicle 1 via transmission device.
Vehicle also includes chassis 10.
Fig. 2 illustrates the Mating graph for the fuel system 4 in internal combustion engine of the invention 2.Fuel system 4 includes multiple
Part, in the plurality of part, fuel filtration 12, high-pressure pump 14, the accumulator for taking 16 form of so-called common rail, with
And (internal combustion engine 2 is opened up in FIG schematically to take the spraying system 18 that fuel injector mode shows to be arranged in internal combustion engine 2
Show).Alternatively, common rail 16 can be substituted by the spraying system 18 of other forms, such as piezoelectric type or modular spraying system.It is high
Press pump 14, common rail 16 and spraying system 18 constitute the part in the high-pressure system 19 of fuel system 4.Fuel system 4 also includes the
One fuel reservoir 20, low-lift pump 22, the first fuel channel 24, low-lift pump 22 are arranged to for fuel to pass through first fuel channel
It is supplied to fuel filtration 12.Control device (not shown) can be arranged and is connected with the multiple parts in fuel system 4.Control
Device can be arranged to be connected with part via CAN.
When internal combustion engine 2 is in operation, low-lift pump 22 is by fuel from fuel reservoir 20 by being arranged on the fuel mistake in downstream
Filter device 12 is pumped, and is further pumped into high-pressure pump 14, and next fuel be further pumped into the high-pressure pump internal combustion
Machine 2.
Fuel system 4 can also include multiple fuel reservoir (not shown).Delivery pump can be arranged to fuel from second
Fuel reservoir is supplied to the first fuel reservoir 20, and the delivery pump can be arranged between each storage tank (not shown).Delivery pump can
To pass through motor operation or mechanically operate.Second fuel reservoir can be equal to main fuel storage tank, the first fuel reservoir
The technology storage tank with the less volume compared with fuel reservoir can be equal to.
What fuel system 4 included opening under a predetermined and/or close gradually open and/or gradually enclosed control valve 30.Control
Valve 30 is arranged on 12 upstream of fuel filtration.Recirculation conduit 32 is arranged on control 22 downstream of 30 upstream of valve and low-lift pump, uses
In making fuel that low-lift pump 22 is recycled back under supply pressure, the supply pressure exceedes the predetermined opening pressure of control valve 30
Power.Low-lift pump 30 mechanically can be operated, and be controlled by the engine speed of internal combustion engine 2.Low-lift pump 22 is following
Control towards the engine speed of internal combustion engine 2, and can be controlled towards high engine speed rapidly in such as engine start
Pump processed.Thus, low-lift pump 22 is cut out when internal combustion engine cuts out.Involute control valve 30 allows fuel to gradually pass through, therefore fuel mistake
Filter device 12 can continuously pressurize in engine start.At the same time, a part of fuel is guided via recirculation conduit 32
Low-lift pump 22 is returned to, so that control valve 30 is not affected by excess pressure.By this way, in internal combustion engine start in fuel
The pressure oscillation occurred in filter 12 is mitigated.Therefore, impurity may be forced through fuel filtration 12 and
Cause the risk minimization of operation disruption.Additionally, fuel filtration 12 because of it is big and frequently pressure oscillation and be damaged
Or the risk minimization disintegrated.
Fuel filtration 12 includes filter housing 50, and filter element 52 is arranged in the filter housing, from
The fuel of the first fuel reservoir 20 is filtered by the filter element.Filter housing 50 can in its own as accumulator that
Sample works, or accumulator 40 can be arranged on control and valve downstream and be connected with filter housing 50, so as to filter for installation
12 connections.Accumulator 40 is arranged on the porch for leading to fuel filtration 12, so as to for example in engine failure by fuel
Filter 12 pressurizes.The purpose of the 30 of accumulator is supplied fuel filtration 12 from before the beginning of low-lift pump 22 in fuel
Pressurization.As fuel filtration 12 is constantly pressurizeed, the pressure oscillation in fuel filter 52 is further mitigated.Store
Depressor 40 is arranged to when needing for fuel to be rapidly provided internal combustion engine, for example when engine is in engine start after stall
Release fuel into fuel filtration 12.The fuel of pressurization is supplied to into fuel filter 52 and internal combustion is further supplied to
Machine 2 leads to and next opens from the path of accumulator 40.When control valve 30 be completely open and low-lift pump 22 turn
When speed is adapted to according to the demand for fuel of internal combustion engine 2, lead to and from the path blockade of accumulator 40.In turn, in internal combustion engine 2
Under rapid pressure drop during closing in system 4, the path for leading to accumulator 40 is opened and filled with fuel.With this side
Formula, effectively can ease off the pressure fluctuation.Valve gear (not shown) is preferably provided at the porch for leading to accumulator, to control
Lead to and from the flowing of accumulator 40.Valve can be electrically to control, as a result, it is possible to achieve the accurate control of accumulator 40
System.The volume of accumulator 40 can for example between 0.1 to 1 liter.
Additionally, fuel system 4 includes fuel return line 60, the high-pressure system 19 of the warm fuel of pressurization from fuel system 4
First fuel reservoir 20 is returned to by the fuel return line.
The method that Fig. 3 illustrates the pressure oscillation in the fuel filtration 12 mitigated in fuel system of the invention 4
Flow chart.As fuel system 4 can be adapted for describing in fig. 2.The method according to the invention includes：Step a) will be controlled
Valve processed 30 is arranged on 22 downstream of 12 upstream of fuel filtration and low-lift pump, to control to lead to the fuel of fuel filtration 12
Stream, and step b) control control valves 30 so which is gradually opened under a predetermined, and step c) makes a part of fuel exist
Low-lift pump 22 is recycled back into via recirculation conduit 32 under pressure more than the predetermined opening pressure for being used to control valve 30.
It is gradually opened due to controlling valve 30, the compression shock in fuel filtration 12 is mitigated.Methods described is also fitted
In accumulator being configured in the porch of fuel filtration so that fuel filtration to be pressurizeed including step d).
By arranging filter housing 50 so which works as accumulator, or by by accumulator 40 be arranged to
Fuel filtration 12 connects, and the pressure differential between the state when internal combustion engine 2 cuts out and the state when internal combustion engine 2 starts is obtained
To reduce.Thus, the pressure oscillation in fuel filtration 12 is mitigated.If internal combustion engine 2 is over time, become again
Start, then the fuel for pressurizeing is can use in fuel filtration 12, it is possible to achieve the rapid and efficient startup of internal combustion engine 2.
The part that hereinbefore specifies and feature in the framework of the present invention can the different embodiments of defined it
Between combine.
Claims (15)
1. the fuel system (4) of internal combustion engine (2) is used for, and the fuel system (4) includes：First fuel reservoir (20)；Fuel mistake
Filter device (12), the fuel filtration are arranged between low-lift pump (22) and high-pressure pump (14)；And first fuel channel
(24), low-lift pump (22) is arranged to for fuel to be supplied to fuel filtration (12), its feature by first fuel channel
Be, under a predetermined open and/or close gradually open and/or gradually enclosed control valve (30) be arranged on fuel filtration
(12) upstream, wherein recirculation conduit (32) are arranged on control valve (30) upstream and low-lift pump (22) downstream, for making fuel exist
Low-lift pump (22) is recycled back under supply pressure, the supply pressure exceedes the predetermined opening pressure in control valve (30).
2. fuel system according to claim 1, it is characterised in that engine of the low-lift pump (22) by internal combustion engine (2)
Speed is mechanically operated and is controlled.
3. fuel system according to claim 1 and 2, it is characterised in that accumulator (40) is arranged under control valve (30)
Swim and be connected with fuel filtration (12).
4. according in the fuel system any one of front claim, it is characterised in that valve gear (12) is arranged on and leads to
The porch of accumulator (40).
5. fuel system according to claim 1 and 2, it is characterised in that fuel filtration (12) is arranged to as pressure accumulation
Device is worked like that.
6. according in the fuel system any one of front claim, it is characterised in that control valve (30) can be with electricity side
Formula is controlled.
7. fuel system according to claim 6, it is characterised in that control valve (30) is arranged to and control device and communication
Bus connects.
8. according in the fuel system any one of front claim, it is characterised in that recirculation conduit (32) is including setting
Put the valve gear in the porch of recirculation conduit (32).
9. according in the fuel system any one of front claim, it is characterised in that control valve (30) is low-lift pump
(22) speed regulator, the speed regulator moves to the first fuel channel (24) from low-lift pump (22), in leading to fuel filter
The porch of device (12).
10. combustion engine (2), it is characterised in that the combustion engine is included according to any one of claim 1-9
Fuel system (4).
11. vehicles (1), it is characterised in that the vehicle includes the fuel system according to any one of claim 1-9
(4)。
12. methods for mitigating the pressure oscillation in the fuel filtration (12) in the fuel system (4) for internal combustion engine (2),
The fuel system (4) includes：First fuel reservoir (20)；Fuel filtration (12), the fuel filtration are arranged on
Between low-lift pump (22) and high-pressure pump (14)；First fuel channel (24), low-lift pump (22) are arranged to fuel via described
One fuel channel is supplied to fuel filtration (12), wherein the method comprising the steps of：
A) control valve (30) is arranged on into fuel filtration (12) upstream and low-lift pump (22) downstream, to control to lead to fuel
The The fuel stream of filter (12)；
B) control control valve (30) so that the control valve is gradually opened under a predetermined；And
C) make a part of fuel under more than the pressure for the predetermined opening pressure for controlling valve (30) via recirculation conduit
(32) it is recycled back into low-lift pump (22).
13. methods according to claim 12, wherein step (b) are also included via control device electrically to control
Valve (30), the control device are connected to control valve (30) via communication bus.
14. methods according to claim 12 or 13, wherein step c) include for valve gear configuration leading to recirculation pipe
The porch in road (32).
Accumulator (40) is also configured in including step d) and is led to by 15. methods according to any one of claim 12-14
The porch of fuel filtration (12), so that fuel filtration (12) is pressurizeed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1450877-4 | 2014-07-08 | ||
| SE1450877A SE540028C2 (en) | 2014-07-08 | 2014-07-08 | Combustion engine fuel system, internal combustion engine with such a fuel system, vehicles with such a fuel system and a method for dampening pressure fluctuations of a fuel filter device in a fuel system |
| PCT/SE2015/050682 WO2016007067A1 (en) | 2014-07-08 | 2015-06-12 | Fuel system for internal combustion engine and a method to lessen pressure fluctuations in a fuel filter device in a fuel system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106536913A true CN106536913A (en) | 2017-03-22 |
| CN106536913B CN106536913B (en) | 2019-07-12 |
Family
ID=55064562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580035201.8A Expired - Fee Related CN106536913B (en) | 2014-07-08 | 2015-06-12 | Method for the pressure oscillation in the fuel filtration in the fuel system and mitigation fuel system of internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3167179A4 (en) |
| CN (1) | CN106536913B (en) |
| SE (1) | SE540028C2 (en) |
| WO (1) | WO2016007067A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709652A (en) * | 2019-10-25 | 2021-04-27 | 现代自动车株式会社 | Integrated fuel filter device for vehicle and vehicle |
| CN114592995A (en) * | 2020-11-20 | 2022-06-07 | 康明斯公司 | Fuel pump apparatus, system and method |
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| WO2002063158A1 (en) * | 2001-02-08 | 2002-08-15 | Robert Bosch Gmbh | Fuel system, method for operating the fuel system, computer programme and control device and/or regulator for controlling said system |
| DE10149412C1 (en) * | 2001-10-06 | 2003-02-06 | Bosch Gmbh Robert | Device for deadening compressive pulsations in a fluid system like a fuel system for an ICE has a casing, a hollow area with an intermittent working area linked to a flow path for a liquid system and intermittent preload devices for gas. |
| US20070227504A1 (en) * | 2005-06-20 | 2007-10-04 | Carroll John T Iii | Apparatus, system, and method for diverting fluid |
| US20090007892A1 (en) * | 2007-07-05 | 2009-01-08 | Caterpillar Inc. | Liquid fuel system with anti-drainback valve and engine using same |
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| DE102010064172A1 (en) * | 2010-12-27 | 2012-06-28 | Robert Bosch Gmbh | Hydraulic pressure intensifier |
| DE102011084675A1 (en) * | 2011-10-18 | 2013-04-18 | Robert Bosch Gmbh | Low-pressure system for common-rail injection system, has balancing volume formed between feed pump and fuel filter and limited by set of spring loaded input pistons, where pistons are switched parallel to change of balancing volume |
| WO2014085758A1 (en) * | 2012-11-30 | 2014-06-05 | Thermo King Corporation | Systems and methods to regulate a pressure in a fuel delivery system |
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|---|---|---|---|---|
| DE10006622A1 (en) * | 2000-02-15 | 2001-08-16 | Bosch Gmbh Robert | Device for supplying a motor vehicle's internal combustion engine with fuel has a feeder unit driven by an electric motor to feed fuel from a reservoir to an internal combustion engine, also pressure-limiting and reverse flow valves. |
| US9097217B2 (en) * | 2011-08-31 | 2015-08-04 | Gm Global Technology Operations. Llc | Propulsion systems and modules for vehicles |
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2014
- 2014-07-08 SE SE1450877A patent/SE540028C2/en not_active IP Right Cessation
-
2015
- 2015-06-12 EP EP15818473.9A patent/EP3167179A4/en not_active Withdrawn
- 2015-06-12 WO PCT/SE2015/050682 patent/WO2016007067A1/en active Application Filing
- 2015-06-12 CN CN201580035201.8A patent/CN106536913B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002063158A1 (en) * | 2001-02-08 | 2002-08-15 | Robert Bosch Gmbh | Fuel system, method for operating the fuel system, computer programme and control device and/or regulator for controlling said system |
| DE10149412C1 (en) * | 2001-10-06 | 2003-02-06 | Bosch Gmbh Robert | Device for deadening compressive pulsations in a fluid system like a fuel system for an ICE has a casing, a hollow area with an intermittent working area linked to a flow path for a liquid system and intermittent preload devices for gas. |
| US20070227504A1 (en) * | 2005-06-20 | 2007-10-04 | Carroll John T Iii | Apparatus, system, and method for diverting fluid |
| US20090007892A1 (en) * | 2007-07-05 | 2009-01-08 | Caterpillar Inc. | Liquid fuel system with anti-drainback valve and engine using same |
| US20100196172A1 (en) * | 2009-02-02 | 2010-08-05 | Denso Corporation | Fuel supply system |
| DE102010064172A1 (en) * | 2010-12-27 | 2012-06-28 | Robert Bosch Gmbh | Hydraulic pressure intensifier |
| DE102011084675A1 (en) * | 2011-10-18 | 2013-04-18 | Robert Bosch Gmbh | Low-pressure system for common-rail injection system, has balancing volume formed between feed pump and fuel filter and limited by set of spring loaded input pistons, where pistons are switched parallel to change of balancing volume |
| WO2014085758A1 (en) * | 2012-11-30 | 2014-06-05 | Thermo King Corporation | Systems and methods to regulate a pressure in a fuel delivery system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112709652A (en) * | 2019-10-25 | 2021-04-27 | 现代自动车株式会社 | Integrated fuel filter device for vehicle and vehicle |
| CN112709652B (en) * | 2019-10-25 | 2024-02-23 | 现代自动车株式会社 | Integrated fuel filter device for vehicle and vehicle |
| CN114592995A (en) * | 2020-11-20 | 2022-06-07 | 康明斯公司 | Fuel pump apparatus, system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| SE1450877A1 (en) | 2016-01-09 |
| CN106536913B (en) | 2019-07-12 |
| EP3167179A4 (en) | 2017-12-06 |
| WO2016007067A1 (en) | 2016-01-14 |
| SE540028C2 (en) | 2018-02-27 |
| EP3167179A1 (en) | 2017-05-17 |
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Granted publication date: 20190712 Termination date: 20200612 |