CN108468608B - Engine fuel system - Google Patents
Engine fuel system Download PDFInfo
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- CN108468608B CN108468608B CN201810157689.7A CN201810157689A CN108468608B CN 108468608 B CN108468608 B CN 108468608B CN 201810157689 A CN201810157689 A CN 201810157689A CN 108468608 B CN108468608 B CN 108468608B
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- oil
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- fuel
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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
- 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
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses an engine fuel system, which comprises a diesel filter, a high-pressure oil pump and a high-pressure oil rail, wherein the diesel filter is provided with a first oil inlet and a first oil outlet; compared with the prior art, the fuel oil recycling system has the advantages that the fuel oil flow in an engine fuel oil system can be increased, the fuel oil is utilized more efficiently, and the power performance and the economy of the whole vehicle are improved.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to an engine fuel system.
Background
The engine fuel system plays an important role in determining whether the engine performance is good or not as a system for supplying power fuel to the engine.
On one hand, the fuel system needs to ensure that the dynamic property of the engine is good, which requires that the fuel system can normally supply and return oil, and on the other hand, the fuel system needs to ensure that the operation of the engine has good economy, which requires that the fuel system cannot waste fuel and has high energy utilization rate.
The fuel system of the engine in the prior art mainly has the following problems: firstly, the fuel which is not combusted in an engine cylinder directly flows back to a fuel tank, and the high heat of the fuel is lost without utilization, so that the energy is wasted, and the utilization rate of the energy is low; and secondly, a high-pressure oil pump of an engine fuel system cannot release pressure and cannot adjust the pressure of the high-pressure oil pump.
Disclosure of Invention
The invention aims to provide an engine fuel system, which aims to solve the problem of low energy utilization rate of the engine fuel system in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
an engine fuel system comprises a diesel filter, a high-pressure oil pump and a high-pressure oil rail, wherein the diesel filter is provided with a first oil inlet and a first oil outlet, the high-pressure oil pump is provided with a second oil inlet and a second oil outlet, and the high-pressure oil rail is provided with a third oil inlet and a third oil outlet; the first oil outlet is communicated with the second oil inlet through a first pipeline, the second oil outlet is communicated with the third oil inlet through a second pipeline, and the third oil outlet is communicated with the first oil inlet through a third pipeline.
Preferably, a first oil return port is arranged on a cavity of the high-pressure oil pump, the first oil return port is communicated with the fuel tank through a fourth pipeline, and the third oil outlet is communicated with the fourth pipeline through a fifth pipeline.
Preferably, a first control valve is arranged between the first oil return opening and the fuel tank in the fourth pipeline.
Preferably, the oil pump further comprises a first flow dividing valve, an inlet of the first flow dividing valve is communicated with the third oil outlet, the first flow dividing valve is provided with a first flow dividing port and a second flow dividing port, the first flow dividing port is communicated with the third pipeline, and the second flow dividing port is communicated with the fifth pipeline.
Preferably, a second oil return port is formed in a cavity of the high-pressure oil rail, the second oil return port is communicated with the fuel tank through a sixth pipeline, and the third oil outlet is communicated with the sixth pipeline through a seventh pipeline.
Preferably, a second control valve is arranged between the second oil return port and the fuel tank in the sixth pipeline.
Preferably, the oil-saving device further comprises a second flow dividing valve, an inlet of the second flow dividing valve is communicated with the third oil outlet, the second flow dividing valve is provided with a third flow dividing port and a fourth flow dividing port, the third flow dividing port is communicated with the third pipeline, and the fourth flow dividing port is communicated with the seventh pipeline.
Preferably, the hydraulic control system further comprises a pressure sensor and a controller, wherein the pressure sensor is used for acquiring the oil pressure in the high-pressure oil rail and sending a signal to the controller, and the controller controls the first control valve or the second control valve to be opened or closed according to the signal.
Preferably, the fuel pre-filter device further comprises an oil suction pipeline, a fuel pre-filter and a low-pressure oil pump, one end of the oil suction pipeline is communicated with the fuel tank, the other end of the oil suction pipeline is communicated with the fuel pre-filter, an outlet of the fuel pre-filter is communicated with an inlet of the low-pressure oil pump, and an outlet of the low-pressure oil pump is communicated with the diesel filter.
The invention has the beneficial effects that:
the invention provides an engine fuel system which comprises a diesel filter, a high-pressure oil pump and a high-pressure oil rail, wherein the diesel filter is provided with a first oil inlet and a first oil outlet; compared with the prior art, the fuel oil recycling system has the advantages that the fuel oil flow in an engine fuel oil system can be increased, the fuel oil is utilized more efficiently, and the power performance and the economy of the whole vehicle are improved.
Furthermore, the high-pressure oil pump and the high-pressure oil rail are provided with the oil return ports, so that the pressure relief and the flow regulation of the high-pressure oil pump and the high-pressure oil rail are realized, and the good working condition of an engine fuel system is ensured.
Drawings
FIG. 1 is a schematic diagram of the overall configuration of an engine fuel system according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a high pressure oil pump according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the piping connection of the engine fuel system according to an embodiment of the present invention.
Description of reference numerals:
1-a diesel filter, 2-a high-pressure oil pump, 4-a first oil inlet, 5-a first oil outlet, 6-a second oil inlet, 7-a second oil outlet, 8-a third oil inlet, 9-a third oil outlet, 10-a first pipeline, 11-a second pipeline, 12-a third pipeline, 13-a first oil return port, 14-a fourth pipeline, 15-a fifth pipeline, 16-an oil suction pipeline, 17-a fuel prefilter and 18-a low-pressure oil pump.
Detailed Description
The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
As shown in fig. 1, an embodiment of the present invention provides an engine fuel system, including a diesel filter 1, a high-pressure oil pump 2, and a high-pressure oil rail, where the diesel filter 1 is provided with a first oil inlet 4 and a first oil outlet 5, the high-pressure oil pump 2 is provided with a second oil inlet 6 and a second oil outlet 7, and the high-pressure oil rail is provided with a third oil inlet 8 and a third oil outlet 9; the first oil outlet 5 is communicated with the second oil inlet 6 through a first pipeline 10, the second oil outlet 7 is communicated with the third oil inlet 8 through a second pipeline 11, and the third oil outlet 9 is communicated with the first oil inlet 4 through a third pipeline 12. The diesel filter 1 is preferably a precision filter.
In the engine fuel system, fuel enters a diesel filter 1 through a first oil inlet 4, is discharged from a first oil outlet 5 after being filtered by the diesel filter 1, enters a high-pressure oil pump 2 through a first pipeline 10 for boosting, is discharged from a second oil outlet 7 of the high-pressure oil pump 2, enters a high-pressure oil rail through a second pipeline 11, is sprayed into a cylinder through a nozzle, and is mixed with air in the cylinder for combustion, so that power is provided for an engine, during the process, the fuel which is not combusted enters the diesel filter 1 through a third pipeline 12 through the first oil inlet 4, is circulated for the next time, and enters the high-pressure oil pump 2, the high-pressure oil rail and the cylinder for combustion for the next time; according to the fuel flow path, the fuel which is not combusted in the high-pressure fuel rail is recycled, and the fuel has certain heat, so that the fuel is more easily and fully combusted when entering the high-pressure fuel rail and the cylinder.
On the basis of the structure, the fuel tank system further comprises an oil suction pipeline 16, a fuel prefilter 17 and a low-pressure oil pump 18 which are sequentially communicated, wherein one end of the oil suction pipeline 16 is communicated with the fuel tank, the other end of the oil suction pipeline is communicated with the fuel prefilter 17, an outlet of the fuel prefilter 17 is communicated with an inlet of the low-pressure oil pump 18, and an outlet of the low-pressure oil pump 18 is communicated with the diesel filter 1. After the low-pressure oil pump 18 is started, the fuel in the fuel tank is sucked into the oil suction pipeline 16, and then is subjected to preliminary filtration by the fuel prefilter 17, so that the quality of the fuel entering the low-pressure oil pump 18 can be ensured, and the blockage of the low-pressure oil pump 18 or the unsmooth circulation of the fuel caused by impurities in the fuel can be avoided. In this configuration, as shown in fig. 3, the third oil outlet 9 is indirectly communicated with the first oil inlet 4 through a third pipeline 12, and the third oil outlet 9 is preferably first communicated with an oil suction pipeline 16 through the third pipeline 12 and then communicated with the first oil inlet 4 through the oil suction pipeline 16, a pre-filter 17 and a low-pressure oil pump 18.
Further, as shown in fig. 2, a first oil return port 13 is arranged on a cavity of the high-pressure oil pump 2, the first oil return port 13 is communicated with a fuel tank through a fourth pipeline 14, and the third oil outlet 9 is communicated with the fourth pipeline 14 through a fifth pipeline 15. When the fuel pressure in the high-pressure oil pump 2 and the high-pressure oil rail is large or the fuel flow is overlarge, redundant fuel can flow back to the fuel tank through the first oil return port 13, the pressure or the flow in the high-pressure oil pump 2 and the high-pressure oil rail is reduced, fuel with proper pressure is provided for the engine, the power performance and the economy of the engine are guaranteed, and meanwhile the service lives of the high-pressure oil pump 2 and the high-pressure oil rail can be prolonged. The third oil outlet 9 is communicated with the fourth pipeline 14 through the fifth pipeline 15, so that high-temperature fuel oil discharged by the high-pressure oil rail can be mixed with fuel oil discharged by the high-pressure oil pump 2 and having relatively low oil temperature, the temperature of the fuel oil in the whole fuel oil pipeline is reduced, and the service life of the fuel oil pipe is prolonged.
In order to control the connection and disconnection between the first oil return port 13 and the fuel tank, a first control valve is arranged between the first oil return port 13 and the fuel tank on the fourth pipeline 14. The first control valve is preferably provided as an electromagnetically controlled valve.
Because the fuel oil discharged from the third oil outlet 9 of the high-pressure oil rail is divided into two paths, one path is filtered by the diesel filter 1 and enters the diesel filter for recycling, the other path is mixed with the fuel oil discharged by the high-pressure oil pump 2 with relatively low temperature to reduce the temperature of the fuel oil and finally flows back to the fuel tank, the total flow of the fuel oil discharged from the high-pressure oil rail is required to be divided at the third oil outlet 9, the fuel oil separator further preferably comprises a first flow dividing valve, the inlet of the first flow dividing valve is communicated with the third oil outlet 9, the first flow dividing valve is provided with a first flow dividing port and a second flow dividing port, the first flow dividing port is communicated with the third pipeline 12, and the second flow dividing port is communicated with the fifth pipeline 15. The total flow of the fuel discharged by the high-pressure fuel rail is distributed through the first flow dividing valve according to needs, so that the needs of the whole system can be better met, and the pressure and the temperature of the fuel in the system are ensured to be in a reasonable range.
In another embodiment, a cavity of the high-pressure oil rail is provided with a second oil return port, the second oil return port is communicated with a fuel tank through a sixth pipeline, and the third oil outlet 9 is communicated with the sixth pipeline through a seventh pipeline. Because the fuel pressure in the high-pressure fuel rail is higher, the second oil return opening is directly arranged on the high-pressure fuel rail, and the fuel pressure in the high-pressure fuel rail can be directly, conveniently and efficiently reduced. The first oil return port 13 and the second oil return port are generally provided in only one of them at the same time. Similarly, the third oil outlet 9 is communicated with the sixth pipeline through the seventh pipeline, so that the temperature of the fuel oil can be adjusted.
In order to control the flow of the fuel discharged from the second oil return port, a second control valve is arranged between the second oil return port and the fuel tank on the sixth pipeline. The second control valve is preferably provided as an electromagnetically controlled valve.
In order to reasonably distribute the flow of the fuel discharged from the high-pressure oil rail, the fuel oil distributor further comprises a second flow dividing valve, wherein an inlet of the second flow dividing valve is communicated with the third oil outlet 9, the second flow dividing valve is provided with a third flow dividing port and a fourth flow dividing port, the third flow dividing port is communicated with the third pipeline 12, and the fourth flow dividing port is communicated with the seventh pipeline.
In addition, the invention also preferably comprises a pressure sensor and a controller, wherein the pressure sensor is used for acquiring the oil pressure in the high-pressure oil rail and sending a signal to the controller, and the controller controls the first control valve or the second control valve to be opened or closed according to the signal. The system is also preferably provided with a flow sensor which detects the flow in the system and sends a signal to the controller, and the controller adjusts the flow distribution of the first flow dividing valve and the second flow dividing valve according to the signal and adjusts the flow of the two branches of the third oil outlet 9 of the high-pressure oil rail so as to better adjust the temperature of the fuel and the flow of the fuel in the system.
The construction, features and functions of the present invention are described in detail in the embodiments illustrated in the drawings, which are only preferred embodiments of the present invention, but the present invention is not limited by the drawings, and all equivalent embodiments modified or changed according to the idea of the present invention should fall within the protection scope of the present invention without departing from the spirit of the present invention covered by the description and the drawings.
Claims (2)
1. The utility model provides an engine fuel system, includes diesel filter (1), high-pressure oil pump (2) and high-pressure oil rail, its characterized in that:
the diesel oil filter (1) is provided with a first oil inlet (4) and a first oil outlet (5), the high-pressure oil pump (2) is provided with a second oil inlet (6) and a second oil outlet (7), and the high-pressure oil rail is provided with a third oil inlet (8) and a third oil outlet (9);
the first oil outlet (5) is communicated with the second oil inlet (6) through a first pipeline (10), the second oil outlet (7) is communicated with the third oil inlet (8) through a second pipeline (11), and the third oil outlet (9) is communicated with the first oil inlet (4) through a third pipeline (12);
a first oil return port (13) is formed in a cavity of the high-pressure oil pump (2), the first oil return port (13) is communicated with a fuel tank through a fourth pipeline (14), and a third oil outlet (9) is communicated with the fourth pipeline (14) through a fifth pipeline (15);
a first control valve is arranged between the first oil return port (13) and the fuel tank on the fourth pipeline (14);
the inlet of the first flow dividing valve is communicated with the third oil outlet (9), the first flow dividing valve is provided with a first flow dividing port and a second flow dividing port, the first flow dividing port is communicated with the third pipeline (12), and the second flow dividing port is communicated with the fifth pipeline (15);
the high-pressure oil rail system is characterized by further comprising a pressure sensor, a flow sensor and a controller, wherein the pressure sensor is used for acquiring the oil pressure in the high-pressure oil rail and sending a signal to the controller, the flow sensor detects the flow in the system and sends a signal to the controller, and the controller controls the first control valve to be opened or closed according to the signal and adjusts the flow distribution of the first flow dividing valve.
2. The engine fuel system according to claim 1, characterized by further comprising an oil suction line (16), a pre-filter (17) and a low-pressure oil pump (18), wherein one end of the oil suction line (16) is communicated with the fuel tank, the other end of the oil suction line is communicated with the pre-filter (17), an outlet of the pre-filter (17) is communicated with an inlet of the low-pressure oil pump (18), and an outlet of the low-pressure oil pump (18) is communicated with the diesel filter (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810157689.7A CN108468608B (en) | 2018-02-24 | 2018-02-24 | Engine fuel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810157689.7A CN108468608B (en) | 2018-02-24 | 2018-02-24 | Engine fuel system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108468608A CN108468608A (en) | 2018-08-31 |
| CN108468608B true CN108468608B (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810157689.7A Active CN108468608B (en) | 2018-02-24 | 2018-02-24 | Engine fuel system |
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| CN (1) | CN108468608B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109356753B (en) * | 2018-11-02 | 2023-10-27 | 郑州日产汽车有限公司 | Fuel system with automobile fuel temperature adjusting function |
| CN110735746B (en) * | 2019-11-06 | 2021-03-09 | 一汽解放汽车有限公司 | Fuel prefilter and prefilter filtering control method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203098103U (en) * | 2013-01-14 | 2013-07-31 | 安徽江淮汽车股份有限公司 | Oil supply system of diesel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4172422B2 (en) * | 2003-09-03 | 2008-10-29 | 株式会社デンソー | Fuel injection pump |
| JP4483974B2 (en) * | 2008-05-06 | 2010-06-16 | 株式会社デンソー | Fuel supply device |
| JP4930521B2 (en) * | 2009-02-02 | 2012-05-16 | 株式会社デンソー | Fuel supply device |
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2018
- 2018-02-24 CN CN201810157689.7A patent/CN108468608B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203098103U (en) * | 2013-01-14 | 2013-07-31 | 安徽江淮汽车股份有限公司 | Oil supply system of diesel engine |
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| Publication number | Publication date |
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| CN108468608A (en) | 2018-08-31 |
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