CN108150324A - For the high-pressure oil pump and engine fuel oil system of engine fuel oil system - Google Patents
For the high-pressure oil pump and engine fuel oil system of engine fuel oil system Download PDFInfo
- Publication number
- CN108150324A CN108150324A CN201711440458.9A CN201711440458A CN108150324A CN 108150324 A CN108150324 A CN 108150324A CN 201711440458 A CN201711440458 A CN 201711440458A CN 108150324 A CN108150324 A CN 108150324A
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- China
- Prior art keywords
- oil
- fuel
- valve
- check valve
- pressure
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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
- F02M37/0047—Layout or arrangement of systems for feeding fuel
- F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
- F02M37/0058—Returnless fuel systems, i.e. the fuel return lines are not entering the fuel tank
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention belongs to technical field of engines, specifically design a kind of high-pressure oil pump and engine fuel oil system for engine fuel oil system.High-pressure oil pump of the present invention, including zero delivery hole and fuel gauging valve, the zero delivery hole is set on the first oil return line, and check valve, the check valve is set on the second oil return line, and the check valve is used to the fuel oil of the minor leakage by the fuel gauging valve be made to be back at the oil inlet end of oil transfer pump via the check valve in the case where the fuel gauging valve is closed and return oil pressure exceeds return flow oil boundary.By using the high-pressure oil pump and engine fuel oil system of the present invention for engine fuel oil system, one check valve of parallel connection on the oil return pipe pipeline in zero delivery hole, the fuel oil missed after effectively fuel gauging valve is closed is introduced into the front end of oil transfer pump, it prevents the fuel oil missed from entering high pressure chest, ensures the normal operation of engine.
Description
Technical field
The invention belongs to technical field of engines, specifically design a kind of high-pressure oil pump and hair for engine fuel oil system
Motivation fuel system.
Background technology
In existing engine, particularly fuel oil (for example, diesel oil) engine, oil will be come from usually using high-pressure oil pump
The low-voltage fuel (for example, low pressure diesel) of case is converted into high pressure fuel.For example, Fig. 1 is a kind of engine combustion of the prior art
The hydraulic schematic diagram of oil system in engine start, is stored in the fuel oil in the first fuel tank 10' the first oil transfer pump 20''s
The first fuel gauging valve 30' is transported to by low pressure pipe after fuel filter filters under pumping effect.Then, fuel oil
The first high-pressure pump 40' is transported to after the first fuel gauging valve 30' meterings, and is led to after the pressurization of the first high-pressure pump 40'
It crosses high-pressure oil pipe and enters common rail pipe, then, fuel oil is assigned to fuel injector from common rail pipe and is injected into cylinder.In addition, the
Oil return line after one fuel gauging valve 30' is equipped with the first zero delivery hole 50', and the first zero delivery hole 50' is used in the first oil
Amount metering valve 30' lays down the fuel oil by the first fuel gauging valve 30' minor leakages in the case of closing, to prevent the combustion of leakage
Oil enters common rail pipe high pressure chest, causes rail pressure abnormal.
But in operating condition than under relatively severe condition, often will appear return oil pressure beyond return flow oil boundary
Scene results in the aerial drainage of the first zero delivery hole 50' to act on and is obstructed, leads to the feelings closed in the first fuel gauging valve 30' in this way
Under condition, fuel oil goes successively to high pressure chest, and rail pressure is caused to transfinite, and even results in PRV valves and opens failure, engine can not be transported normally
Turn.
Invention content
The purpose of the present invention is to solve above-mentioned at least one problem, which is by the following technical programs
It realizes.
The present invention proposes a kind of high-pressure oil pump for engine fuel oil system, including zero delivery hole and fuel contents gauge
Valve is measured, the zero delivery hole is set on the first oil return line, and the zero delivery hole is used for the feelings closed in the fuel gauging valve
Make to be back to fuel tank via the zero delivery hole by the fuel oil of the fuel gauging valve minor leakage under condition；
And check valve, the check valve are set on the second oil return line, the check valve is used in the fuel gauging
Make to pass through by the fuel oil of the fuel gauging valve minor leakage in the case that valve is closed and return oil pressure exceeds return flow oil boundary
The oil inlet end of oil transfer pump is back to by the check valve, even if the Opening pressure of the check valve is set so that by described
The fuel oil of fuel gauging valve minor leakage can also open the check valve.
The invention also provides a kind of high-pressure oil pump for engine fuel oil system, including zero delivery hole and oil mass
Metering valve, the zero delivery hole are set on oil return line, and the zero delivery hole is used for situation about being closed in the fuel gauging valve
Under make to carry out oil return via the zero delivery hole by the fuel oil of the fuel gauging valve minor leakage, the zero delivery hole goes out
The first oil return line and the second oil return line are equipped at oily end, first oil return line is used for tank drainback, and described second
Oil return line is equipped with check valve for the oil inlet end oil return to oil transfer pump, second oil return line, and the check valve is used for
Make in the case where the fuel gauging valve is closed and return oil pressure exceeds return flow oil boundary micro- by the fuel gauging valve
The fuel oil of small leakage is back to via the check valve at the oil inlet end of oil transfer pump, and the Opening pressure of the check valve is set as making
It obtains even if by the way that the check valve can be opened the fuel oil of the fuel gauging valve minor leakage.
Further, second oil return line be equipped with Venturi tube, the check valve by the Venturi tube to
The oil inlet end of the oil transfer pump carries out oil return.
Further, second oil return line is equipped with throttle valve, and the throttle valve is used to prevent the oil transfer pump
Negative pressure opens check valve suction in normal work.
The invention also provides a kind of engine fuel oil systems, and engine fuel oil system is used for including described above
High-pressure oil pump.
Further, the engine fuel oil system further includes electrodynamic pump, and the electrodynamic pump is set on the fuel tank and described
Between oil transfer pump, the electrodynamic pump is used to making common rail engine quickly the gas in discharge line and can establish rail on startup
Pressure.
Further, the engine fuel oil system further includes fuel preliminary filter and secondary fuel oil filter, the fuel oil coarse filtration
Device is set on the oil inlet pipe of the oil transfer pump, and the secondary fuel oil filter is set in the oil outlet pipe of the oil transfer pump.
Further, the engine fuel oil system further includes by-passing valve, the by-passing valve parallel connection on the oil transfer pump,
For discharging the gas in the fuel tank.
By using the high-pressure oil pump and engine fuel oil system of the present invention for engine fuel oil system, zero
One check valve of parallel connection on the oil return pipe pipeline of metering orifice, the fuel oil missed after effectively fuel gauging valve is closed are introduced into defeated
The front end of oil pump prevents the fuel oil missed from entering high pressure chest, rail pressure is caused to transfinite, and ensures the normal operation of engine.
Description of the drawings
By reading the detailed description of hereafter preferred embodiment, it is various other the advantages of and benefit it is common for this field
Technical staff will become clear.Attached drawing is only used for showing the purpose of preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 is the hydraulic schematic diagram of engine fuel oil system in the prior art；
Fig. 2 is the hydraulic schematic diagram of one embodiment of the invention；
The hydraulic schematic diagram of Fig. 3 positions another embodiment of the present invention.
Respectively label represents as follows in attached drawing：
10'：First fuel tank, 20'：First oil transfer pump, 30'：First fuel gauging valve, 40'：First high-pressure pump, 50'：The
One zero delivery hole；
10：Fuel tank, 20：Oil transfer pump, 30：Fuel gauging valve, 40：High-pressure pump, 50：Zero delivery hole, 60：Check valve, 70：Text
Venturi, 80：Throttle valve.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although this public affairs is shown in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to be best understood from the disclosure, and can be by this public affairs on the contrary, providing these embodiments
The range opened completely is communicated to those skilled in the art.
Fig. 2 is the hydraulic schematic diagram of one embodiment of the invention.As shown in Fig. 2, the engine fuel oil system in the present embodiment
Including high-pressure oil pump, wherein high-pressure oil pump includes zero delivery hole 50 and fuel gauging valve 30, and zero delivery hole 50 is set on the first oil return
On pipeline, zero delivery hole 50 is used to make through the minor leakage of fuel gauging valve 30 in the case where fuel gauging valve 30 is closed
Fuel oil is back to fuel tank 10 via zero delivery hole 50.
High-pressure oil pump in the present embodiment further includes check valve 60, and check valve 60 is set on the second oil return line, check valve
60 are used to close in fuel gauging valve 30 and return oil pressure makes through fuel gauging valve 30 in the case of the return flow oil boundary
The fuel oil of minor leakage be back to via check valve 60 at the oil inlet end of oil transfer pump 20, the Opening pressure of check valve 60 is set as
So that being capable of open check valve 60 the fuel oil of the minor leakage by fuel gauging valve 30.
In the present embodiment, the oil inlet end in zero delivery hole 50 and the oil inlet end of check valve 60 go out respectively with fuel gauging valve 30
Oily end is connected, and the oil outlet end in zero delivery hole 50 is connected with fuel tank 10, the oil outlet end of check valve 60 and the oil inlet end phase of oil transfer pump 20
Even.When high-pressure oil pump is in normal work, the fuel oil in fuel tank 10 is input to by fuel contents gauge by the pumping effect of oil transfer pump 20
It measures in valve 30.Then, fuel oil reaches high-pressure pump 40 after the metering of fuel gauging valve 30, and leads to after the pressurization of high-pressure pump 40
It crosses high-pressure oil pipe and enters common rail pipe, then, fuel oil is assigned to fuel injector from common rail pipe and is injected into cylinder.
When the fuel oil excess of supply, fuel gauging valve 30 is closed.At this point, fraction of combustion is had in fuel gauging valve 30
Oil is leaked, and the fuel oil to prevent from leaking out is entered in high pressure chest, and rail pressure is caused to transfinite, in the defeated of fuel gauging valve 30
Outlet is also associated with zero delivery hole 50.Oil return is carried out by zero delivery hole 50, the fuel oil of leakage is delivered to fuel tank 10.
In order to prevent during oil return return oil pressure exceed return flow oil boundary, cause leakage fuel oil can not oil return,
Check valve 60, the oil inlet end of check valve 60 and the port of export phase of fuel gauging valve 30 are also parallel in the inlet of zero oil return hole 50
Even, the port of export of check valve 60 is connected with the input end of oil transfer pump 20, so as to exceed return flow oil boundary when return oil pressure, passes through
The return flow oil of leakage to the input end of oil transfer pump 20 is prevented fuel oil aggregation from entering high pressure chest, rail pressure is caused to surpass by check valve 60
Limit, ensure that the normal operation of engine.Wherein the Opening pressure of check valve 60 is set according to the application boundary of return oil pressure
Meter, should be able to ensure being capable of open check valve 60 the fuel oil of the minor leakage by fuel gauging valve 30.Meanwhile at this
In embodiment, in the inlet parallel connection check valve 60 of zero oil return hole 50, when being also prevented from blocking due to zero oil return hole 50
Caused by fuel oil can not oil return.
Further, in order to improve oil extraction efficiency, Venturi tube 70 is equipped on the second oil return line, check valve 60 passes through
Venturi tube 70 carries out oil return to the oil inlet end of oil transfer pump 20.
Venturi tube 70 is designed after check valve 60, check valve 60 is communicated to the front end of oil transfer pump 20 by Venturi tube 70
Quick oil return is realized in part.
Further, throttle valve 80 is equipped on the second oil return line, throttle valve 80 is used to prevent the negative pressure of oil transfer pump 20
The suction of check valve 60 is opened in normal work, improves the safety in utilization of high-pressure oil pump.
Further, the high-pressure oil pump in the present embodiment further includes electrodynamic pump.As shown in Fig. 2, electrodynamic pump is set on fuel tank 10
Between oil transfer pump 20, for making common rail engine that quickly the gas in discharge line and rail pressure can be established on startup.
Further, also it is parallel with by-passing valve on oil transfer pump 20.The gas of electrodynamic pump discharge is by by-passing valve with oil return
Pipeline discharge system.
Further, to improve oil quality, prevent each component in fuel system from blocking, the high pressure in the present embodiment
Oil pump further includes fuel preliminary filter and secondary fuel oil filter.Fuel preliminary filter is set on the oil inlet pipe of oil transfer pump 20, fuel oil refined filtration
Device is set in the oil outlet pipe of oil transfer pump 20.It is effectively low to reduce by the double filtration of fuel preliminary filter and secondary fuel oil filter
Impurity content in fluid prevents impurity from blocking valve opening, improves the reliability of system operation.
The hydraulic schematic diagram of Fig. 3 positions another embodiment of the present invention.As shown in figure 3, the present embodiment and upper one embodiment
Uniquely difference lies in the oil inlet end of the check valve 60 in the present embodiment is connected with the oil outlet end in zero delivery hole 50, check valve 60
Oil inlet end of the oil outlet end equally with oil transfer pump 20 is connected, and can equally play when return oil pressure is beyond return flow oil boundary, pass through
Check valve 60 carries out the purpose of oil return.
By using the high-pressure oil pump and engine fuel oil system of the present invention for engine fuel oil system, zero
One check valve of parallel connection on the oil return pipe pipeline of metering orifice, the fuel oil missed after effectively fuel gauging valve is closed are introduced into defeated
The front end of oil pump prevents the fuel oil missed from entering high pressure chest, rail pressure is caused to transfinite, and ensures the normal operation of engine.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (8)
1. a kind of high-pressure oil pump for engine fuel oil system, which is characterized in that including：
Zero delivery hole and fuel gauging valve, the zero delivery hole are set on the first oil return line, and the zero delivery hole is used in institute
Stating in the case that fuel gauging valve is closed makes the fuel oil by the minor leakage of the fuel gauging valve via the zero delivery hole
It is back to fuel tank；And
Check valve, the check valve be set on the second oil return line on, the check valve be used for the fuel gauging valve close and
Return oil pressure makes the fuel oil by the minor leakage of the fuel gauging valve via described in the case of exceeding return flow oil boundary
Check valve is back at the oil inlet end of oil transfer pump, even if the Opening pressure of the check valve is set so that through the fuel contents gauge
The check valve can also be opened by measuring the fuel oil of the minor leakage of valve.
2. a kind of high-pressure oil pump for engine fuel oil system, which is characterized in that including zero delivery hole and fuel gauging valve, institute
Zero delivery hole is stated on oil return line, the zero delivery hole is used to make to pass through institute in the case where the fuel gauging valve is closed
The fuel oil for stating the minor leakage of fuel gauging valve carries out oil return via the zero delivery hole, is set at the oil outlet end in the zero delivery hole
There are the first oil return line and the second oil return line, first oil return line is used for tank drainback, second oil return line
For the oil inlet end oil return to oil transfer pump, second oil return line is equipped with check valve, and the check valve is used in the oil
Make the minor leakage by the fuel gauging valve in the case that amount metering valve is closed and return oil pressure exceeds return flow oil boundary
Fuel oil be back at the oil inlet end of oil transfer pump via the check valve, even if the Opening pressure of the check valve is set so that
The check valve can also be opened by the fuel oil of the minor leakage of the fuel gauging valve.
3. the high-pressure oil pump according to claim 1 or 2 for engine fuel oil system, which is characterized in that described second
Oil return line is equipped with Venturi tube, and the check valve is returned by the oil inlet end of the Venturi tube to the oil transfer pump
Oil.
4. the high-pressure oil pump according to claim 1 or 2 for engine fuel oil system, which is characterized in that described second
Oil return line is equipped with throttle valve, and the negative pressure that the throttle valve is used to prevent the oil transfer pump will be described unidirectional in normal work
Valve suction is opened.
5. a kind of engine fuel oil system, which is characterized in that including being fired described in any one of claim 1-4 for engine
The high-pressure oil pump of oil system.
6. engine fuel oil system according to claim 5, which is characterized in that further include electrodynamic pump, the electrodynamic pump is set
Between the fuel tank and the oil transfer pump, the electrodynamic pump is used to make common rail engine on startup being capable of quick discharge line
In gas and establish rail pressure.
7. engine fuel oil system according to claim 5, which is characterized in that further include fuel preliminary filter and fuel oil refined filtration
Device, the fuel preliminary filter are set on the oil inlet pipe of the oil transfer pump, and the secondary fuel oil filter is set on going out for the oil transfer pump
On oil pipe line.
8. engine fuel oil system according to claim 5, which is characterized in that further include by-passing valve, the by-passing valve is simultaneously
On connection and the oil transfer pump, for discharging the gas in the fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711440458.9A CN108150324B (en) | 2017-12-27 | 2017-12-27 | High-pressure oil pump for engine fuel system and engine fuel system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711440458.9A CN108150324B (en) | 2017-12-27 | 2017-12-27 | High-pressure oil pump for engine fuel system and engine fuel system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108150324A true CN108150324A (en) | 2018-06-12 |
| CN108150324B CN108150324B (en) | 2020-01-03 |
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ID=62462139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711440458.9A Active CN108150324B (en) | 2017-12-27 | 2017-12-27 | High-pressure oil pump for engine fuel system and engine fuel system |
Country Status (1)
| Country | Link |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111156119A (en) * | 2019-12-30 | 2020-05-15 | 潍柴动力股份有限公司 | Fuel system and method for detecting aging of fuel system |
| CN111878272A (en) * | 2020-06-30 | 2020-11-03 | 潍柴动力股份有限公司 | Exhaust device and exhaust method for high-pressure oil pump |
| CN112304398A (en) * | 2020-09-27 | 2021-02-02 | 长沙五七一二飞机工业有限责任公司 | Helicopter fuel flow sensor test device |
| CN112431698A (en) * | 2020-11-03 | 2021-03-02 | 无锡华友发电设备有限公司 | Device for realizing stable fuel supply of diesel generator set |
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| CN103201496A (en) * | 2010-11-08 | 2013-07-10 | 罗伯特·博世有限公司 | Fuel injection system of an internal combustion engine |
| EP2708728A2 (en) * | 2012-09-17 | 2014-03-19 | Robert Bosch Gmbh | Low pressure circuit for a fuel injection system |
| CN106246429A (en) * | 2016-08-30 | 2016-12-21 | 潍柴动力股份有限公司 | Engine fuel oil system and include the electromotor of this engine fuel oil system |
| CN106246424A (en) * | 2016-08-29 | 2016-12-21 | 潍柴动力股份有限公司 | High-pressure oil pump, engine fuel oil system and electromotor |
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2017
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| CN102472219A (en) * | 2009-06-30 | 2012-05-23 | 罗伯特·博世有限公司 | Fuel system for an internal combustion engine |
| DE102009028614A1 (en) * | 2009-08-18 | 2011-02-24 | Robert Bosch Gmbh | Fuel injection system for internal-combustion engine, has zero-feed throttle that is formed in area of return socket of return unit such that leakage pipe opens in ring channel |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111156119A (en) * | 2019-12-30 | 2020-05-15 | 潍柴动力股份有限公司 | Fuel system and method for detecting aging of fuel system |
| CN111878272A (en) * | 2020-06-30 | 2020-11-03 | 潍柴动力股份有限公司 | Exhaust device and exhaust method for high-pressure oil pump |
| CN112304398A (en) * | 2020-09-27 | 2021-02-02 | 长沙五七一二飞机工业有限责任公司 | Helicopter fuel flow sensor test device |
| CN112431698A (en) * | 2020-11-03 | 2021-03-02 | 无锡华友发电设备有限公司 | Device for realizing stable fuel supply of diesel generator set |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108150324B (en) | 2020-01-03 |
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