CN102691604B - Multi-stage boosting electric-control common-rail oil injection system - Google Patents
Multi-stage boosting electric-control common-rail oil injection system Download PDFInfo
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- CN102691604B CN102691604B CN201210163136.5A CN201210163136A CN102691604B CN 102691604 B CN102691604 B CN 102691604B CN 201210163136 A CN201210163136 A CN 201210163136A CN 102691604 B CN102691604 B CN 102691604B
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Abstract
The invention aims to provide a multi-stage boosting electric-control common-rail oil injection system comprising an engine oil tank, a high-pressure engine oil pump, an oil tank, an oil pump, a multi-stage boosting control portion, an electric-control oil injector, an engine oil common-rail pipe, an oil common-rail pipe, a pressure sensor, a relief valve and an oil inlet pipe. The high-pressure engine oil pump is connected with the engine oil tank and the engine oil common-rail pipe, the oil pump is connected with the oil tank and the oil common-rail pipe, the multi-stage boosting control portion is connected with the engine oil common-rail pipe and the oil common-rail pipe and is connected with the electric-control oil injector through the oil inlet pipe, the electric-control oil injector is connected with the oil common-rail pipe, the pressure sensor and the relief valve are mounted on the engine oil common-rail pipe, and the engine oil common-rail pipe is communicated with the engine oil tank through the relief valve. The oil injection pressure of the multi-stage boosting electric-control common-rail oil injection system can be controlled flexibly and quickly, the defects of large capacity and slow pressure changing speed of common-rail pipes of existing large and medium-size diesel engines are overcome, oil injection can be at different speeds, and economy and dynamic performance of the diesel engine can be effectively improved, and harmful emission is reduced.
Description
Technical field
What the present invention relates to is a kind of motor, specifically the injection system of motor.
Background technique
The increasingly stringent with boat diesel engine Abgasgesetz that develops rapidly along with diesel electric-controlled fuel injection technic, adopts new electronic control injection system to become the inexorable trend of boat diesel engine development.Electric-controlled co-rail injection system can be realized fast, accurately, neatly Fuel Injection Quantity for Diesel and fuel injection characteristic are controlled, effectively improve economic performance and the power performance of diesel engine, significantly reduce noxious emission simultaneously, be one of current the most advanced electric control fuel oil jet system, on boat diesel engine, be widely used.Because big-and-middle-sized diesel engine cycle fuel injection quantity peculiar to vessel is large, for being provided, enough fuel injection quantitys stabilize the pressure surge causing in fuel feeding and injection process simultaneously, require to be equipped with on diesel engine the common rail pipe of larger volume, can cause common rail pipe internal pressure to set up speed thus slow, and can increase difficulty and the cost of permanent high pressure sealing in common rail pipe simultaneously.Therefore the fuel injection system of many big-and-middle-sized diesel engines peculiar to vessel adopts supercharging type electric-controlled co-rail injection system conventionally, common rail pipe in system is no longer put aside the high pressure fuel that is directly used in injection, but for accumulating fuel oil or the hydraulic work oil that pressure is lower, utilize charged piston according to a certain percentage the fuel pressure of accumulating in common rail pipe to be amplified, the fuel oil that is about to spray is carried out to supercharging, supply with electric-controlled fuel injector for spraying.
Be applied to the supercharging type electric-controlled co-rail injection system of the big-and-middle-sized diesel engine of boats and ships, can improve to a certain extent the speed of setting up of rail pressure, effectively reduce difficulty and the cost of permanent high pressure sealing in common rail pipe, and can realize high-pressure injection, but still have the deficiency part, require further improvement.
1, for the supercharging type electric-controlled co-rail injection system of big-and-middle-sized diesel applications peculiar to vessel, although the fuel pressure in common rail pipe is significantly reduced, but the circulating fuel injection quantity of big-and-middle-sized diesel engine is large, for enough fuel injection quantitys are provided and reduce the interference of pressure surge to injection process as far as possible, the volume of common rail pipe is still larger, in rail, fuel oil is many, it is long that rail pressure changes lag time, system cannot realize tracking and compress into row fast, control flexibly, the rail pressure of system cannot change fast, is generally a determined value.Supercharging type electric-controlled co-rail injection system only has a charged piston simultaneously, for definite common rail pressure, through charged piston, fuel pressure is carried out after a certain proportion of amplification, and system only can spray into fuel oil in cylinder with a certain definite jet pressure.Therefore applied supercharging type electric-controlled co-rail injection system on current big-and-middle-sized diesel engine peculiar to vessel, be difficult to realize to rail pressure fast and flexible control, thereby cannot realize the flexible control to injection pressure, can only under single jet pressure, complete the course of injection of fuel oil, be difficult to meet the requirement to different fuel-injection pressures under different rotating speeds and operating mode of big-and-middle-sized diesel engine.
2, on current big-and-middle-sized diesel engine peculiar to vessel, applied supercharging type electric-controlled co-rail injection system only disposes a charged piston, under definite common rail pressure, cannot realize in a course of injection injection rate is regulated, be difficult to further improve the jet performance of electric-controlled co-rail injection system, limited the further optimization to motor.
Summary of the invention
The object of the present invention is to provide and be applied to can realize fuel-injection pressure and injection rate are carried out to the multi-stage booster electric-controlled co-rail injection system of controlling flexibly on big-and-middle-sized diesel engine peculiar to vessel.
The object of the present invention is achieved like this:
Multi-stage booster electric-controlled co-rail injection system of the present invention, it is characterized in that: comprise sump, high pressure lubricating oil pump, fuel tank, fuel pump, multi-stage booster control section, electric-controlled fuel injector, machine oil common rail pipe, fuel common-rail pipe, pressure transducer, pressure-limit valve, oil inlet pipe, high pressure lubricating oil pump junctor fuel tank and machine oil common rail pipe, fuel pump connects fuel tank and fuel common-rail pipe, multi-stage booster control section connects machine oil common rail pipe, fuel common-rail pipe also connects electric-controlled fuel injector by oil inlet pipe, electric-controlled fuel injector connects fuel common-rail pipe, setting pressure sensor and pressure-limit valve on machine oil common rail pipe, machine oil common rail pipe is communicated with sump by pressure-limit valve.
The present invention can also comprise:
1, described multi-stage booster control section comprises multi-stage booster control unit, multi-stage booster control unit comprises two-position three way magnetic valve, charged piston, in line check valve, return check valve, charged piston top arranges charged piston top hydraulic pressure cavity, charged piston below arranges charged piston below hydraulic pressure cavity, charged piston hydraulic control chamber is set in charged piston, the first charged piston top hydraulic pressure cavity connects machine oil common rail pipe and sump by the first two-position three way magnetic valve, the first charged piston control chamber connects fuel common-rail pipe by the first in line check valve respectively, by return check valve, connect fuel tank, the first charged piston below hydraulic pressure cavity connects the second charged piston top hydraulic pressure cavity and oil inlet pipe by the second two-position three way magnetic valve, the second charged piston control chamber connects fuel common-rail pipe by the second in line check valve respectively, by return check valve, connect fuel tank, the second charged piston below hydraulic pressure cavity connects oil inlet pipe, the 3rd in line check valve is communicated with fuel common-rail pipe and oil inlet pipe.
2, the pressure ratio of the first described charged piston and the second charged piston is respectively 6 and 2.
3, described multi-stage booster control unit also comprises charged piston Returnning spring, and charged piston Returnning spring is arranged in charged piston.
4, described electric-controlled fuel injector comprises bi-bit bi-pass high-speed electromagnetic valve, control piston, needle-valve, oil holding slot, control piston connects needle-valve, control piston top arranges pressure control cavity, pressure control cavity connects fuel tank by bi-bit bi-pass high-speed electromagnetic valve, pressure control cavity is also communicated with oil inlet pipe, between pressure control cavity and bi-bit bi-pass high-speed electromagnetic valve, fuel-displaced throttle orifice is set, meter in hole is set between pressure control cavity and oil inlet pipe, oil holding slot is arranged on needle-valve place and is connected with oil inlet pipe.
5, described electric-controlled fuel injector also comprises needle-valve Returnning spring, and needle-valve Returnning spring is arranged on needle-valve top.
6, described multi-stage booster control unit and electric-controlled fuel injector form an oil spout unit, and the quantity of oil spout unit equals the quantity of engine cylinder.
Advantage of the present invention is: the present invention controls by the cooperation of solenoid valve, can be flexibly the injection pressure of control system rapidly, overcome big-and-middle-sized common rail for diesel engine pipe volume peculiar to vessel large, the deficiency that pressure change speed is slow, and can realize multiple injection rate, can meet diesel engine requirement to injection pressure and fuel injection characteristic under different rotating speeds and operating mode, thereby effectively improve Economy and the power performance of diesel engine, reduce noxious emission.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is multi-stage booster control section of the present invention and electric-controlled fuel injector part-structure schematic diagram;
Fig. 3 is multi-stage booster control section structural representation of the present invention;
Fig. 4 electric-controlled fuel injector part-structure of the present invention schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, for example the present invention is described in more detail:
In conjunction with Fig. 1～4, multi-stage booster electric-controlled co-rail injection system mainly comprises sump 1, fuel tank 12, filter cleaner 2,6,11,13, high pressure lubricating oil pump 3, machine oil common rail pipe 8, fuel pump 10, fuel common-rail pipe 14, multi-stage booster control section 15, electric-controlled fuel injector 16 and oil pipe etc.Machine oil in sump 1 is sent in machine oil common rail pipe 8 by high-pressure unit oil pipe 4,5 by high pressure lubricating oil pump 3 after the filtration of oil filter 2 and 6.Pressure-limit valve 7 and pressure transducer 9 are installed on machine oil common rail pipe 8.Pressure-limit valve 7 is for limiting rail pressure, and when rail pressure surpasses limit value, pressure-limit valve 7 is opened, and the machine oil in machine oil common rail pipe is released in sump 1 by return tube, thereby reduces rail pressure.Pressure transducer 9 is for measuring in real time the engine oil pressure in machine oil common rail pipe, and pressure signal is fed back to electronic control unit for the control of rail pressure.Machine oil common rail pipe 8 has the effect of accumulating machine oil and stabilizing the pressure surge of pipe inner engine oil, and is responsible for machine oil to be assigned in the hydraulic pressure cavity of charged piston top.The working oil of multi-stage booster electric-controlled co-rail injection system is machine oil, utilizes machine oil to carry out supercharging to fuel oil.
Fig. 2 is the structural representation of multi-stage booster electric-controlled co-rail injection system multi-stage booster control section and electric-controlled fuel injector part.Fig. 3,4 is respectively the structural representation of multi-stage booster control section and electric-controlled fuel injector part.As shown in FIG., multi-stage booster control section 15 is connected with electric-controlled fuel injector with common rail pipe respectively, this part comprises in line check valve 17,29, charged piston 22,26, two-position three-way electromagnetic control valve 18,24, charged piston Returnning spring 21,27, charged piston below hydraulic pressure cavity 19,30, charged piston top hydraulic pressure cavity 23,25, charged piston hydraulic control chamber 20,28 and charged piston return check valve 31.Solenoid valve 18 is arranged between charged piston below hydraulic pressure cavity 19 and electric-controlled fuel injector 16 and the path of charged piston top hydraulic pressure cavity 25, for switching the opening and closing of two paths, injection system is operated under different mode of operations.Solenoid valve 24 for control oil-feed path between charged piston top hydraulic pressure cavity 23 and machine oil common rail pipe 8 and and sump 1 between way to cycle oil.Charged piston hydraulic control chamber 20 is connected with fuel common-rail pipe 14 by line check valve 17,29 respectively with 28, and is connected with fuel tank 12 by return check valve 31.Charged piston below hydraulic pressure cavity 19,30 communicates with electric-controlled fuel injector 16 and passes through in line check valve 32 and is connected with fuel common-rail pipe 14.The cracking pressure of return check valve 31 is greater than the cracking pressure of in line check valve 17 and 29.
Multi-stage booster control section utilizes two-position three way magnetic valve control charged piston whether the fuel oil in the hydraulic pressure cavity of charged piston below to be carried out to supercharging.When solenoid valve no electric circuit, charged piston is not implemented pressurization to the fuel oil in the hydraulic pressure cavity of below.When solenoid valve is switched on, charged piston carries out supercharging to the fuel oil in the hydraulic pressure cavity of below, the fuel oil in charged piston hydraulic control chamber is pushed back to fuel tank by return check valve simultaneously.After end of injection, solenoid valve power-off, pressurization system is communicated with sump, pressure reduces rapidly, fuel oil in fuel common-rail pipe 14 enters charged piston hydraulic control chamber 20,28 through one- way valve 17,29, coordinates the reposition force of charged piston below hydraulic pressure and Returnning spring that charged piston is pushed back to top dead center.
In line check valve 17,29 fuel oil in charged piston hydraulic control chamber 19 and 30 when preventing that charged piston is descending flows back to fuel common-rail pipe, to guarantee that in fuel common-rail pipe, fuel pressure is stable, the cracking pressure of return check valve 31 is greater than the cracking pressure of in line check valve 17 and 32, can guarantee that the interior fuel oil in charged piston hydraulic control chamber 19,30 can directly not flow back to fuel tank 12 when charged piston 22,26 is not implemented pressurization.In line check valve 32 is pressurized plunger booster fuel oil for stoping flows back to fuel common-rail pipe 14, thereby guarantees stable fuel oil rail pressure and boost pressure.
Electric-controlled fuel injector 16 is connected with fuel common-rail pipe 14 by line check valve 32, and communicate with two charged piston below hydraulic pressure cavity, mainly by bi-bit bi-pass high-speed electromagnetic valve 33, meter in hole 36, pressure control cavity 35, fuel-displaced throttle orifice 34, control piston 37, needle-valve Returnning spring 38, needle-valve return spring holder 39, needle-valve 40, oil holding slot 41 and fuel tank 12, formed.Electric-controlled fuel injector is connected with fuel common-rail pipe 14 by one-way valve 32, and communicates with the hydraulic pressure cavity 19 and 30 of charged piston below.Pressure control cavity 35 is connected with fuel common-rail pipe 14 with charged piston below hydraulic pressure cavity 19,30 by meter in hole 36, by fuel-displaced throttle orifice 34, is connected with fuel tank 12.Unlatching and closure by drainback passage between solenoid valve 33 pilot pressure control chambers 35 and fuel tank 12.
Fuel oil in solenoid valve 33 pilot pressure control chambers 35 is to the drainback passage of fuel tank 12, during solenoid valve 33 power-failure close, drainback passage is sealed, the interior fuel oil of pressure control cavity 35 is greater than to the downward active area of control piston 37 active area that oil holding slot 41 intermediate fuel oils make progress to needle-valve 40, therefore under the acting in conjunction of the spring force of the interior fuel pressure of pressure control cavity 35 and needle-valve Returnning spring 38, needle-valve 40 reset of taking a seat, sealing jet orifice.When solenoid valve 33 energisings are opened, drainback passage is opened, fuel oil in pressure control cavity 35 is released rapidly in fuel tank 12, fuel pressure in pressure control cavity 35 declines rapidly, the active force that oil holding slot 41 intermediate fuel oil pressure make progress to needle-valve 40 is greater than the downward spring force of needle-valve Returnning spring 38, needle-valve 40 rises, and opens spray orifice, commencement of fuel injection process.
Electric-controlled fuel injector 16, according to diesel engine speed and operating mode demand, regulates the oil spout moment, the duration of injection and the injecting times of oil sprayer according to control command.
Working principle of the present invention is:
When oil sprayer carries out oil spout, cooperation by solenoid valve 18,24 and 33 is controlled, multi-stage booster electric-controlled co-rail injection system can be operated under three kinds of patterns, under identical machine oil common rail pressure condition, can carry out fuel oil injection with multiple different injection pressures and injection rate.
1, in injection process, solenoid valve 18 power-off, solenoid valve 24 energisings.Solenoid valve 18 power-off, cut off hydraulic pressure cavity 19 and hydraulic pressure cavity 25, and are communicated with fuel common-rail pipe 14 by one-way valve 32, and not pressurized fuel oil enters in hydraulic pressure cavity 19.Solenoid valve 24 energisings, make hydraulic pressure cavity 23 be communicated with machine oil common rail pipe 8, and high-pressure oil enters in hydraulic pressure cavity 23, promotes charged piston 22 descending, the fuel oil in hydraulic pressure cavity 19 is pressurizeed, and the high pressure fuel after supercharging is sent in electric-controlled fuel injector 16.After solenoid valve 33 energisings are opened, system commencement of fuel injection, injection pressure is determined by the pressure ratio of charged piston 22, is the rail pressure of 6 times of machine oil common rail pipes.After end of injection, solenoid valve 24 power-off, make hydraulic pressure cavity 23 be communicated with sump 1, and pressure reduces rapidly.Fuel oil in fuel common-rail pipe 14 enters in the hydraulic control chamber 20 of charged piston 22 by one-way valve 17, coordinate the reposition force of charged piston 22 below hydraulic pressure and Returnning spring 21 that charged piston 22 is pushed back to top dead center, fuel oil in fuel common-rail pipe 14 refills hydraulic pressure cavity 19 through one-way valve 32, prepares to spray next time.
2,, in injection process, solenoid valve 18,24 is switched on simultaneously.Solenoid valve 18 energisings, make hydraulic pressure cavity 19 be communicated with hydraulic pressure cavity 25, cut off with fuel common-rail pipe 14, and now the fuel oil of fuel common-rail pipe 14 interior non-intensified enters in the hydraulic pressure cavity 30 of charged piston 26 belows by one-way valve 32.Solenoid valve 24 energisings, hydraulic pressure cavity 23 is communicated with machine oil common rail pipe 8, high-pressure oil enters in hydraulic pressure cavity 23, promote charged piston 22 descending, fuel oil in hydraulic pressure cavity 19 is pressurizeed, and be pressed in hydraulic pressure cavity 25, and then carrying out supercharging by the fuel oil in 26 pairs of hydraulic pressure cavity 30 of charged piston, the fuel oil after supercharging is admitted in electric-controlled fuel injector 16.After solenoid valve 33 energisings are opened, system commencement of fuel injection, injection pressure is jointly determined by the pressure ratio of charged piston 22,26, is the rail pressure of 6 * 2=12 times of machine oil common rail pipe.After end of injection, the first power-off of solenoid valve 24, pressurization system is communicated with sump, pressure reduces rapidly, fuel oil in fuel common-rail pipe 14 is through entering hydraulic pressure cavity 28 through one-way valve 17, coordinate the reposition force of charged piston 26 below hydraulic pressure and Returnning spring 27 that charged piston 26 is pushed back to top dead center, the fuel oil in hydraulic pressure cavity 25 is pushed back in hydraulic pressure cavity 19.Then solenoid valve 18 power-off again, by one-way valve 17, enter the fuel oil in hydraulic control chamber 20, coordinate the reposition force of charged piston 22 below hydraulic pressure and Returnning spring 21 that charged piston 22 is pushed back to top dead center, fuel oil in fuel common-rail pipe 14 refills hydraulic pressure cavity 19 through one-way valve 32, prepares to spray next time.
3, in injection process, solenoid valve 24 is first switched on, the rear energising of solenoid valve 18.When solenoid valve 24 energising and solenoid valve 18 are not switched on, pressurized effect is identical with the 1st kind of mode of operation, and by the independent supercharging of charged piston 22, pressure ratio is the rail pressure of 6 times of machine oil common rail pipes.And when point 18 is also switched on, pressurized effect is identical with mode of operation in the 2nd, by the common supercharging of charged piston 22,26, pressure ratio is the rail pressure of 12 times of machine oil common rail pipes.Therefore,, under this kind of mode of operation, can obtain the two-stage cascade fuel-injection pressure that pressure raises gradually, and then effectively control the injection rate in injection process.
In injection process, by the opening and closing of solenoid valve on electric-controlled fuel injector 33, constantly determine beginning and the finish time of oil spout, the opening time of solenoid valve 33 is determined the fuel injection pulsewidth of system.When the solenoid valve 33 of electric-controlled fuel injector is opened, the fuel oil in oil sprayer hydraulic control chamber 35 flows back to fuel tank 12 via return tube.
By the multi-injection that can realize the control of injection pressure and injection rate and electric-controlled fuel injector under three kinds of mode of operations, control function, multi-stage booster electric-controlled co-rail injection system is injection pressure and the injection rate of control system neatly, meet diesel engine requirement to different injection pressures and injection rate under different rotating speeds and operating mode, can effectively improve jet performance, further improve the performance of diesel engine, reduce noxious emission.
Claims (9)
1. multi-stage booster electric-controlled co-rail injection system, it is characterized in that: comprise sump, high pressure lubricating oil pump, fuel tank, fuel pump, multi-stage booster control section, electric-controlled fuel injector, machine oil common rail pipe, fuel common-rail pipe, pressure transducer, pressure-limit valve, oil inlet pipe, high pressure lubricating oil pump junctor fuel tank and machine oil common rail pipe, fuel pump connects fuel tank and fuel common-rail pipe, multi-stage booster control section connects machine oil common rail pipe, fuel common-rail pipe also connects electric-controlled fuel injector by oil inlet pipe, electric-controlled fuel injector connects fuel common-rail pipe, setting pressure sensor and pressure-limit valve on machine oil common rail pipe, machine oil common rail pipe is communicated with sump by pressure-limit valve.
2. multi-stage booster electric-controlled co-rail injection system according to claim 1, it is characterized in that: described multi-stage booster control section comprises multi-stage booster control unit, multi-stage booster control unit comprises two-position three way magnetic valve, charged piston, in line check valve, return check valve, charged piston top arranges charged piston top hydraulic pressure cavity, charged piston below arranges charged piston below hydraulic pressure cavity, charged piston hydraulic control chamber is set in charged piston, the first charged piston top hydraulic pressure cavity connects machine oil common rail pipe and sump by the first two-position three way magnetic valve, the first charged piston control chamber connects fuel common-rail pipe by the first in line check valve respectively, by return check valve, connect fuel tank, the first charged piston below hydraulic pressure cavity connects the second charged piston top hydraulic pressure cavity and oil inlet pipe by the second two-position three way magnetic valve, the second charged piston control chamber connects fuel common-rail pipe by the second in line check valve respectively, by return check valve, connect fuel tank, the second charged piston below hydraulic pressure cavity connects oil inlet pipe, the 3rd in line check valve is communicated with fuel common-rail pipe and oil inlet pipe.
3. multi-stage booster electric-controlled co-rail injection system according to claim 2, is characterized in that: the first described charged piston and the pressure ratio of the second charged piston are respectively 6 and 2.
4. multi-stage booster electric-controlled co-rail injection system according to claim 3, is characterized in that: described multi-stage booster control unit also comprises charged piston Returnning spring, and charged piston Returnning spring is arranged in charged piston.
5. according to the arbitrary described multi-stage booster electric-controlled co-rail injection system of claim 1-4, it is characterized in that: described electric-controlled fuel injector comprises bi-bit bi-pass high-speed electromagnetic valve, control piston, needle-valve, oil holding slot, control piston connects needle-valve, control piston top arranges pressure control cavity, pressure control cavity connects fuel tank by bi-bit bi-pass high-speed electromagnetic valve, pressure control cavity is also communicated with oil inlet pipe, between pressure control cavity and bi-bit bi-pass high-speed electromagnetic valve, fuel-displaced throttle orifice is set, meter in hole is set between pressure control cavity and oil inlet pipe, oil holding slot is arranged on needle-valve place and is connected with oil inlet pipe.
6. multi-stage booster electric-controlled co-rail injection system according to claim 5, is characterized in that: described electric-controlled fuel injector also comprises needle-valve Returnning spring, and needle-valve Returnning spring is arranged on needle-valve top.
7. according to the arbitrary described multi-stage booster electric-controlled co-rail injection system of claim 2-4, it is characterized in that: described multi-stage booster control unit and electric-controlled fuel injector form an oil spout unit, and the quantity of oil spout unit equals the quantity of engine cylinder.
8. according to the arbitrary described multi-stage booster electric-controlled co-rail injection system of claim 2-4, it is characterized in that: described electric-controlled fuel injector comprises bi-bit bi-pass high-speed electromagnetic valve, control piston, needle-valve, oil holding slot, control piston connects needle-valve, control piston top arranges pressure control cavity, pressure control cavity connects fuel tank by bi-bit bi-pass high-speed electromagnetic valve, pressure control cavity is also communicated with oil inlet pipe, between pressure control cavity and bi-bit bi-pass high-speed electromagnetic valve, fuel-displaced throttle orifice is set, meter in hole is set between pressure control cavity and oil inlet pipe, oil holding slot is arranged on needle-valve place and is connected with oil inlet pipe, described multi-stage booster control unit and electric-controlled fuel injector form an oil spout unit, and the quantity of oil spout unit equals the quantity of engine cylinder.
9. according to the arbitrary described multi-stage booster electric-controlled co-rail injection system of claim 2-4, it is characterized in that: described electric-controlled fuel injector comprises bi-bit bi-pass high-speed electromagnetic valve, control piston, needle-valve, oil holding slot, control piston connects needle-valve, control piston top arranges pressure control cavity, pressure control cavity connects fuel tank by bi-bit bi-pass high-speed electromagnetic valve, pressure control cavity is also communicated with oil inlet pipe, between pressure control cavity and bi-bit bi-pass high-speed electromagnetic valve, fuel-displaced throttle orifice is set, meter in hole is set between pressure control cavity and oil inlet pipe, oil holding slot is arranged on needle-valve place and is connected with oil inlet pipe, described electric-controlled fuel injector also comprises needle-valve Returnning spring, and needle-valve Returnning spring is arranged on needle-valve top, described multi-stage booster control unit and electric-controlled fuel injector form an oil spout unit, and the quantity of oil spout unit equals the quantity of engine cylinder.
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| CN201210163136.5A CN102691604B (en) | 2012-05-24 | 2012-05-24 | Multi-stage boosting electric-control common-rail oil injection system |
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| CN201210163136.5A CN102691604B (en) | 2012-05-24 | 2012-05-24 | Multi-stage boosting electric-control common-rail oil injection system |
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| CN102691604B true CN102691604B (en) | 2014-01-29 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102900579A (en) * | 2012-10-22 | 2013-01-30 | 哈尔滨工程大学 | Variable-oil injection pressure double-boosting common-trail oil injection system |
| CN102900576A (en) * | 2012-10-22 | 2013-01-30 | 哈尔滨工程大学 | Electric control common rail oil injection system with two-stage supercharging piston |
| CN104595078A (en) * | 2014-11-26 | 2015-05-06 | 中国北方发动机研究所(天津) | Electronic control injector |
| CN105569898A (en) * | 2015-12-24 | 2016-05-11 | 芜湖恒耀汽车零部件有限公司 | Automobile exhaust waste gas recycling system |
| CN105651534B (en) * | 2015-12-30 | 2018-06-05 | 中国航空工业集团公司沈阳发动机设计研究所 | A kind of achievable high pressure and the system of low-voltage fuel oil cooler experiment |
| CN112814816B (en) * | 2020-12-18 | 2024-06-11 | 南岳电控（衡阳）工业技术股份有限公司 | High-pressure common rail fuel injection system and control method thereof |
| CN112780416A (en) * | 2021-01-29 | 2021-05-11 | 安徽应流航空科技有限公司 | Main fuel oil distribution structure |
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