CN210622949U - Oil pump pressure regulating valve - Google Patents
Oil pump pressure regulating valve Download PDFInfo
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- CN210622949U CN210622949U CN201921271791.6U CN201921271791U CN210622949U CN 210622949 U CN210622949 U CN 210622949U CN 201921271791 U CN201921271791 U CN 201921271791U CN 210622949 U CN210622949 U CN 210622949U
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Abstract
The utility model discloses an oil pump air-vent valve relates to valve technical field. The pressure regulating valve comprises a valve body, a pressure regulating spring, an oil return structure, a pressure regulating structure and a micro-leakage valve; the pressure regulating structure divides the internal cavity of the valve body into an upper cavity and a lower cavity, the pressure regulating spring is installed between the top surface of the upper cavity and the pressure regulating structure, the lower cavity is provided with an oil inlet, the oil inlet end of an oil return structure internally provided with an oil return pipe is inserted into the lower cavity and then sealed by the pressure regulating structure, the pressure regulating structure is provided with the micro-leakage valve, and the micro-leakage valve controls the opening and closing of a micro-leakage channel communicated with the lower cavity and the oil return pipe; when the oil inlet enters oil with small pressure, the micro leakage channel is opened for pressure relief, and when the oil inlet enters oil with normal pressure, the pressure regulating channel and the micro leakage channel are opened for pressure relief at the same time. The micro-leakage channel quickly reduces the pressure of an oil rail during vehicle immersion, and the problem that the engine is difficult to start is solved.
Description
Technical Field
The utility model belongs to the technical field of the valve technique and specifically relates to an oil pump air-vent valve is related to.
Background
The low-pressure fuel system of the gasoline engine generally comprises a low-pressure fuel injector assembly (comprising a fuel injector and a fuel rail), a low-pressure fuel pump and a low-pressure fuel pipeline, wherein the low-pressure fuel pump mainly comprises a pressure regulating valve and a pump core. When the engine runs, the oil pump provides fuel oil with certain pressure for the engine, and the pressure of the fuel oil system is regulated by a pressure regulating valve arranged in the oil pump. The pressure regulating valve mainly has two structural types of a diaphragm type and a straight-through type.
When the pressure P1 in the fuel system is greater than the pressure regulating pressure set by the pressure regulating valve, the pressure regulating valve opens for oil drainage, so that the pressure of the whole system is maintained at a stable level.
The oil pump stops working after the engine is shut down, the pressure in the fuel system is immediately reduced to a certain value from the pressure set by the system, the oil pump leaks, the oil pump has certain pressure maintaining capacity after the engine is shut down, and the pressure in the fuel pipeline is gradually reduced until the pressure is equivalent to the environmental pressure P2 along with the extension of the shutdown time. However, in some special high-temperature environments, due to the heat radiation of the engine and the influence of the high-temperature environment during the dipping-in after flameout, the static fuel in the fuel rail and the fuel pipe is heated, and the fuel leaks and volatilizes in the fuel pipe, so that the pressure of the fuel rail is kept at a high level for a long time, which is unfavorable for the low-pressure fuel injector. Due to the manufacturing process of the low-pressure oil sprayer, a certain micro-leakage exists at the nozzle of the oil sprayer, the size of the leakage quantity is in positive correlation with the pressure of an oil rail, and the larger the pressure of the oil rail is, the larger the leakage quantity is. If the pressure in the oil way is too high for a long time, the instantaneous leakage amount is increased, the accumulated leakage amount is also increased remarkably, accumulated fuel oil is gathered in an air inlet manifold and is diffused to the whole air inlet pipe behind a throttle valve when meeting high temperature, the fuel oil enters the engine in the starting stage, compared with normal starting, the fuel oil in the starting stage is too much, the air-fuel ratio of the mixed gas deviated from the theoretical equivalent is too much, ignition cannot be performed seriously, and the phenomenon of difficult starting after hot dipping occurs. The same vehicle is provided with an oil sprayer with a certain leakage amount, the pressure reduction rate in the oil rail is slowed along with the rise of the ambient temperature, when the ambient temperature reaches 50 ℃, the accumulated leakage amount of the oil sprayer is large, the mixed gas in the cylinder is too thick when the air inlet manifold is started due to the redundant fuel oil, and the starting time is long. It is therefore necessary to rapidly reduce rail pressure during soak after shutdown to solve the problem of difficult start-up due to excessive fuel injector leakage caused by high pressure.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an oil pump air-vent valve to solve the engine after flame-out soak the oil rail pressure during the car too high, the difficult problem of starting that the sprayer leaked too much and brought.
In order to achieve the aim, the utility model provides an oil pump pressure regulating valve, which comprises a valve body, a pressure regulating spring, an oil return structure, a pressure regulating structure and a micro-leakage valve; a cavity is formed in the valve body, the cavity is divided into an upper cavity and a lower cavity by the pressure regulating structure, the pressure regulating spring is installed between the top surface of the upper cavity and the pressure regulating structure, an oil inlet is formed in the cavity wall of the lower cavity, an oil return pipe is arranged in the oil return structure, and the oil inlet end of the oil return structure is inserted into the lower cavity and then sealed by the pressure regulating structure; a micro-leakage channel and a micro-leakage valve are arranged in the pressure regulating structure, the micro-leakage channel is communicated with the lower cavity and the oil return pipe, and the micro-leakage valve controls the opening and closing of the micro-leakage channel; when the oil inlet feeds oil at a pressure lower than the normal pressure, the micro-leakage valve opens the micro-leakage channel, and fuel enters the lower cavity from the oil inlet and flows back to the oil tank through the micro-leakage channel; the oil inlet is when with normal pressure oil feed, the oil pressure compression the pressure regulating spring is opened the oil feed end of returning oil pipe forms the pressure regulating passageway, and simultaneously, the oil pressure makes the little leak valve will little leak passage opens, and the fuel is followed the oil inlet gets into lower cavity, the warp little leak passage with the pressure regulating passageway flows back to the oil tank.
Optionally, the pressure regulating valve includes a diaphragm type pressure regulating valve, the pressure regulating structure is a diaphragm assembly, the pressure regulating spring of the upper chamber props against the diaphragm assembly after being pre-pressed, and the diaphragm assembly controls opening and closing of the pressure regulating channel.
Optionally, the pre-pressure of the pressure regulating spring is adjustable.
Optionally, the oil return structure is a straight cylindrical metal pipe.
Optionally, a sealing structure is arranged between the oil inlet end of the oil return structure and the diaphragm assembly, and when the oil inlet enters oil under the pressure lower than the normal pressure, the oil inlet end of the oil return structure and the diaphragm assembly keep sealed.
Optionally, the oil return structure and the valve body are in interference connection or welded connection.
Optionally, the micro-leakage valve includes a small diaphragm assembly and a micro-leakage channel spring, a micro-leakage cavity is arranged in the diaphragm assembly, and the small diaphragm assembly divides the micro-leakage cavity into two chambers, namely a first chamber and a second chamber; the micro-leakage channel spring is fixedly arranged in the first cavity close to the pressure regulating spring, and the micro-leakage channel spring is pre-pressed by set pressure and then props against the small membrane component; a first through hole and a second through hole are formed in the cavity wall of the second cavity, the first through hole is aligned to the oil inlet end of the oil return pipe, the second through hole is communicated with the lower cavity, and the second cavity, the first through hole and the second through hole form the micro-leakage channel; a protruding part is arranged on the small membrane assembly, the protruding part seals the first through hole, and the micro-leakage channel is closed; when oil enters the oil inlet, fuel oil enters the second cavity from the lower cavity through the second through hole, the small diaphragm assembly is pushed by oil pressure, the first through hole is unsealed, and the micro-leakage channel is opened.
Optionally, the first through hole is a round hole or a square hole, and the second through hole is a round hole or a square hole.
Optionally, the diaphragm assembly and the small diaphragm assembly comprise diaphragms made of rubber fibers or metal sheets, and the diaphragms can be elastically deformed by pressure acting on the diaphragms.
Optionally, the oil outlet end of the oil return structure is provided with an annular groove, and a sealing ring is arranged at the annular groove.
The utility model discloses an among the oil pump air-vent valve, the oil pump air-vent valve includes: the valve comprises a valve body, a pressure regulating spring, an oil return structure, a pressure regulating structure and a micro-leakage valve; a cavity is formed in the valve body, the cavity is divided into an upper cavity and a lower cavity by the pressure regulating structure, the pressure regulating spring is installed between the top surface of the upper cavity and the pressure regulating structure, an oil inlet is formed in the cavity wall of the lower cavity, an oil return pipe is arranged in the oil return structure, and the oil inlet end of the oil return structure is inserted into the lower cavity and then sealed by the pressure regulating structure; a micro-leakage channel and a micro-leakage valve are arranged in the pressure regulating structure, the micro-leakage channel is communicated with the lower cavity and the oil return pipe, and the micro-leakage valve controls the opening and closing of the micro-leakage channel; when the oil inlet feeds oil at a pressure lower than the normal pressure, the micro-leakage valve opens the micro-leakage channel, and fuel enters the lower cavity from the oil inlet and flows back to the oil tank through the micro-leakage channel. The micro-leakage channel is formed in the pressure regulating channel, so that the pressure of an oil rail during vehicle immersion after flameout is rapidly reduced, and the problems that the pressure of the oil rail is increased and the micro-leakage at the nozzle of an oil injector is increased to cause difficulty in starting the engine due to the influence of heat radiation of the engine and a high-temperature environment during vehicle immersion after flameout of the engine are solved.
Drawings
Fig. 1 is a schematic structural view of a pressure regulating valve of an oil pump according to an embodiment of the present invention;
fig. 2 is a partially enlarged schematic view of a pressure regulating valve structure of an oil pump according to an embodiment of the present invention;
wherein: 10-a valve body, 11-an oil inlet, 101-an upper chamber, 102-a lower chamber, 20-a pressure regulating spring, 30-a diaphragm assembly, 301-a first chamber, 302-a second chamber, 303-a first through hole, 304-a second through hole, 40-a small diaphragm assembly, 50-a micro-leakage channel spring, 60-an oil return structure, 61-an oil return pipe, 70-a sealing ring and 80-a sealing structure.
Detailed Description
The following description of the embodiments of the present invention will be described in more detail with reference to the drawings. Advantages and features of the present invention will become apparent from the following description and claims. It should be noted that the drawings are in simplified form and are not to precise scale, and are provided for convenience and clarity in order to facilitate the description of the embodiments of the present invention.
The embodiment provides an oil pump pressure regulating valve which is used for rapidly reducing the oil rail pressure during the vehicle immersion after flameout so as to solve the problems that the engine is difficult to start and the like caused by the fact that the oil rail pressure is increased and the micro-leakage at the nozzle of an oil injector is increased due to the influence of engine heat radiation and a high-temperature environment during the vehicle immersion after flameout of the engine.
Fig. 1 is a schematic view of an oil pump pressure regulating valve according to an embodiment of the present invention, and fig. 2 is a schematic view of an oil pump pressure regulating valve according to an embodiment of the present invention. As shown in fig. 1 and 2, the oil pump pressure regulating valve comprises a valve body 10, a pressure regulating spring 20, an oil return structure 60, a pressure regulating structure and a micro-leakage valve;
a cavity is formed inside the valve body 10, the cavity is divided into an upper cavity 101 and a lower cavity 102 by the pressure regulating structure, the pressure regulating spring 20 is installed between the top surface of the upper cavity 101 and the pressure regulating structure, an oil inlet 11 is formed in the cavity wall of the lower cavity 102, an oil return pipe 61 is arranged inside the oil return structure 60, and the oil inlet end of the oil return structure 60 is sealed by the pressure regulating structure after being inserted into the lower cavity 102; a micro-leakage channel and a micro-leakage valve are arranged in the pressure regulating structure, the micro-leakage channel is communicated with the lower cavity 102 and the oil return pipe 61, and the micro-leakage valve controls the opening and closing of the micro-leakage channel;
when the oil inlet 11 is fed with oil at a pressure (micro pressure) lower than the normal pressure, the micro-leakage valve opens the micro-leakage channel, and the fuel enters the lower chamber 102 from the oil inlet 11 and flows back to the oil tank through the micro-leakage channel;
oil pressure compression when oil inlet 11 is with normal pressure oil feed, pressure regulating spring 20 opens oil feed end of returning oil pipe 61 forms the pressure regulating passageway, and simultaneously, the oil pressure makes little leakage valve will little leakage passage opens, and the fuel is followed oil inlet 11 gets into lower cavity 102, the warp little leakage passage with the pressure regulating passageway flows back to the oil tank.
After the engine is flamed out, the pressure is quickly relieved through the micro-leakage channel, the accumulated leakage amount of the oil injector is reduced, and the problem of difficult starting after hot dipping is solved; when the pressure is reduced to a certain degree, the micro-leakage channel is closed, and meanwhile, the minimum pressure maintaining is realized.
Specifically, as shown in fig. 1 and 2, the micro-leakage valve includes a small diaphragm assembly 40 and a micro-leakage channel spring 50, a micro-leakage cavity is disposed inside the diaphragm assembly 30, and the small diaphragm assembly 40 divides the micro-leakage cavity into two chambers, namely a first chamber 301 and a second chamber 302; the micro-leakage channel spring 50 is fixedly arranged in the first cavity 301 close to the pressure regulating spring 20, and the micro-leakage channel spring 50 is pre-pressed by a set pressure and then props against the small diaphragm assembly 40; a first through hole 303 and a second through hole 304 are formed in the wall of the second chamber 302, the first through hole 303 is aligned with the oil inlet end of the oil return pipe 61, the second through hole 304 is communicated with the lower chamber 102, and the second chamber 302, the first through hole 303 and the second through hole 304 form the micro-leakage channel; a protruding part is arranged on the small membrane assembly 40, the protruding part seals the first through hole 303, and the micro-leakage channel is closed; when oil enters the oil inlet 11, fuel enters the second chamber 302 from the lower chamber 102 through the second through hole 304, the oil pressure pushes the small diaphragm assembly 40, the first through hole 303 is unsealed, and the micro-leakage channel is opened.
In this embodiment, the first through hole 303 is a circular hole or a square hole, and the second through hole 304 is a circular hole or a square hole. By changing the sizes of the first through hole 303 and the second through hole 304 which form the micro-leakage channel, the oil path pressure relief speed during vehicle immersion can be adjusted.
In this embodiment, the diaphragm assembly 40 and the small diaphragm assembly 30 comprise diaphragms made of rubber fiber or metal thin sheets, and the diaphragms are elastically deformed by the pressure acting on the diaphragms.
As shown in fig. 1, the pressure regulating valve includes a diaphragm type pressure regulating valve, the pressure regulating structure is a diaphragm assembly 30, the pressure regulating spring 20 installed in the upper chamber 101 is pre-pressed and then props against the diaphragm assembly 30, the diaphragm assembly 30 controls the opening and closing of the pressure regulating channel, and the micro leakage valve is installed on the diaphragm assembly 30. The fuel is followed oil inlet 11 gets into cavity 102 down, cavity 102 oil pressure constantly increases the compression down pressure regulating spring 20, diaphragm assembly 30 keeps away from the oil feed end is opened the pressure regulating passageway, the fuel warp pressure regulating passageway, return oil pipe 61 flow back to the oil tank.
In the present embodiment, the preload of the pressure regulating spring 20 is adjustable. The pre-pressure of the pressure regulating spring 20 can be regulated, so that the oil pressure of the oil way is regulated, and the pressure of the oil way is kept stable.
As shown in fig. 1, the oil return structure 60 is a straight tubular metal pipe. The oil return structure 60 is easy to process, simple in structure and low in production cost. The oil return pipe can be made of stainless steel materials to meet the corrosion resistance requirement.
Fig. 2 is a schematic diagram illustrating a partial enlarged structure of an oil pump pressure regulating valve according to an embodiment of the present invention. As shown in fig. 1 and 2, a sealing structure 80 is disposed between the oil inlet end of the oil return structure 60 and the diaphragm assembly 30, and the oil inlet end of the oil return structure 60 and the diaphragm assembly 30 are kept sealed when oil is fed through the oil inlet 11 under a slight pressure.
As shown in fig. 1 and 2, the oil return structure 60 and the valve body 10 are connected by interference fit or welding. The oil return structure 60 and the valve body 10 are simple and reliable in connection structure, and low in production cost. The oil outlet end of the oil return structure 60 is provided with an annular groove, and the annular groove is provided with a sealing ring 70. The sealing ring 70 seals the oil return structure 60 and an oil return line connected with the oil return structure well.
In summary, in an embodiment of the present invention, an oil pump pressure regulating valve includes a valve body, a pressure regulating spring, an oil return structure, a pressure regulating structure, and a micro-leakage valve; the pressure regulating structure divides the cavity into an upper cavity and a lower cavity, the pressure regulating spring is installed in the upper cavity, an oil inlet is formed in the cavity wall of the lower cavity, and the oil inlet end of the oil return structure is inserted into the lower cavity and then sealed by the pressure regulating structure; a micro-leakage channel and a micro-leakage valve are arranged in the pressure regulating structure, the micro-leakage channel is communicated with the lower cavity and the oil return pipe, and the micro-leakage valve controls the opening and closing of the micro-leakage channel; when the oil inlet feeds oil at a pressure lower than the normal pressure, the micro-leakage valve opens the micro-leakage channel, and fuel enters the lower cavity from the oil inlet and flows back to the oil tank through the micro-leakage channel; the oil inlet is when with normal pressure oil feed, the oil pressure compression the pressure regulating spring is opened the oil feed end of returning oil pipe forms the pressure regulating passageway, and simultaneously, the oil pressure makes the little leak valve will little leak passage opens, and the fuel is followed the oil inlet gets into lower cavity, the warp little leak passage with the pressure regulating passageway flows back to the oil tank. The micro-leakage valve comprises a small diaphragm assembly and a micro-leakage channel spring, a micro-leakage cavity is arranged in the diaphragm assembly, and the small diaphragm assembly divides the micro-leakage cavity into a first cavity and a second cavity which are two cavities; the micro-leakage channel spring is fixedly arranged in the first cavity, a first through hole and a second through hole are formed in the cavity wall of the second cavity, the first through hole is aligned to the oil inlet end of the oil return pipe, the second through hole is communicated with the lower cavity, and the second cavity, the first through hole and the second through hole form the micro-leakage channel; a protruding part is arranged on the small membrane assembly, the protruding part seals the first through hole, and the micro-leakage channel is closed; when oil enters the oil inlet, fuel oil enters the second cavity from the lower cavity through the second through hole, the small diaphragm assembly is pushed by oil pressure, the first through hole is unsealed, and the micro-leakage channel is opened.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention. Any person skilled in the art can make any equivalent substitutions or modifications to the technical solutions and technical contents disclosed in the present invention without departing from the scope of the technical solutions of the present invention, and the contents of the technical solutions of the present invention are not left.
Claims (10)
1. An oil pump pressure regulating valve is characterized by comprising a valve body, a pressure regulating spring, an oil return structure, a pressure regulating structure and a micro-leakage valve;
a cavity is formed in the valve body, the cavity is divided into an upper cavity and a lower cavity by the pressure regulating structure, the pressure regulating spring is installed between the top surface of the upper cavity and the pressure regulating structure, an oil inlet is formed in the cavity wall of the lower cavity, an oil return pipe is arranged in the oil return structure, and the oil inlet end of the oil return structure is inserted into the lower cavity and then sealed by the pressure regulating structure;
a micro-leakage channel and a micro-leakage valve are arranged in the pressure regulating structure, the micro-leakage channel is communicated with the lower cavity and the oil return pipe, and the micro-leakage valve controls the opening and closing of the micro-leakage channel;
when the oil inlet feeds oil at a pressure lower than the normal pressure, the micro-leakage valve opens the micro-leakage channel, and fuel enters the lower cavity from the oil inlet and flows back to the oil tank through the micro-leakage channel;
the oil inlet is when with normal pressure oil feed, the oil pressure compression the pressure regulating spring is opened the oil feed end of returning oil pipe forms the pressure regulating passageway, and simultaneously, the oil pressure makes the little leak valve will little leak passage opens, and the fuel is followed the oil inlet gets into lower cavity, the warp little leak passage with the pressure regulating passageway flows back to the oil tank.
2. The oil pump pressure regulating valve according to claim 1, wherein said pressure regulating valve comprises a diaphragm type pressure regulating valve, said pressure regulating structure is a diaphragm assembly, said pressure regulating spring installed in said upper chamber is pre-compressed and then abuts against said diaphragm assembly, and said diaphragm assembly controls the opening and closing of said pressure regulating channel.
3. The oil pump pressure regulating valve according to claim 2, wherein the pre-pressure of said pressure regulating spring is adjustable.
4. The pressure regulating valve for oil pump according to claim 2, wherein said oil returning structure is a straight cylindrical metal pipe.
5. The oil pump pressure regulating valve according to claim 4, wherein a sealing structure is provided between the oil inlet end of said oil return structure and said diaphragm assembly, and when said oil inlet is fed with a pressure lower than a normal pressure, the oil inlet end of said oil return structure and said diaphragm assembly are kept sealed.
6. The oil pump pressure regulating valve according to claim 2, wherein said oil return structure and said valve body are connected by interference fit or welding.
7. The oil pump pressure regulating valve according to claim 2, wherein said micro-leakage valve comprises a small diaphragm assembly and a micro-leakage channel spring, a micro-leakage cavity is arranged in said diaphragm assembly, and said small diaphragm assembly divides said micro-leakage cavity into two chambers, namely a first chamber and a second chamber; the micro-leakage channel spring is fixedly arranged in the first cavity close to the pressure regulating spring, and the micro-leakage channel spring is pre-pressed by set pressure and then props against the small membrane component; a first through hole and a second through hole are formed in the cavity wall of the second cavity, the first through hole is aligned to the oil inlet end of the oil return pipe, the second through hole is communicated with the lower cavity, and the second cavity, the first through hole and the second through hole form the micro-leakage channel; a protruding part is arranged on the small membrane assembly, the protruding part seals the first through hole, and the micro-leakage channel is closed; when oil enters the oil inlet, fuel oil enters the second cavity from the lower cavity through the second through hole, the small diaphragm assembly is pushed by oil pressure, the first through hole is unsealed, and the micro-leakage channel is opened.
8. The oil pump pressure regulating valve according to claim 7, wherein said first through hole is a circular hole or a square hole, and said second through hole is a circular hole or a square hole.
9. The oil pump pressure regulating valve according to claim 7, wherein said diaphragm assembly and said small diaphragm assembly comprise diaphragms made of rubber fiber or metal thin sheet, and pressure acting on said diaphragms elastically deforms said diaphragms.
10. The oil pump pressure regulating valve according to claim 7, characterized in that the oil outlet end of said oil return structure is provided with an annular groove, and a sealing ring is arranged at said annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921271791.6U CN210622949U (en) | 2019-08-07 | 2019-08-07 | Oil pump pressure regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921271791.6U CN210622949U (en) | 2019-08-07 | 2019-08-07 | Oil pump pressure regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210622949U true CN210622949U (en) | 2020-05-26 |
Family
ID=70760698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921271791.6U Active CN210622949U (en) | 2019-08-07 | 2019-08-07 | Oil pump pressure regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210622949U (en) |
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2019
- 2019-08-07 CN CN201921271791.6U patent/CN210622949U/en active Active
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