CN214533334U - Engine oil supply system, engine oil injection system and engine - Google Patents
Engine oil supply system, engine oil injection system and engine Download PDFInfo
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- CN214533334U CN214533334U CN202120021797.9U CN202120021797U CN214533334U CN 214533334 U CN214533334 U CN 214533334U CN 202120021797 U CN202120021797 U CN 202120021797U CN 214533334 U CN214533334 U CN 214533334U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The utility model provides an engine oil supply system, engine oil spout system and engine, engine oil supply system are arranged in taking the medium in the oil tank out to the sprayer, including first fuel delivery pump, second fuel delivery pump, sensor module and control module group, and the entry of first fuel delivery pump and second fuel delivery pump is connected with the oil tank respectively, and the export of first fuel delivery pump is connected with the entry of second fuel delivery pump; the sensor assembly comprises a first pressure sensor, the first pressure sensor is electrically connected with the control module, and the first pressure sensor is used for detecting the external atmospheric pressure; when the first pressure sensor detects that the external atmospheric pressure is smaller than a first pressure threshold value, the control module controls the first oil transfer pump to start working. The utility model provides an engine oil feeding system has guaranteed the fuel feeding ability of fuel delivery pump, has solved because the fuel delivery pump fuel feeding ability not enough problem that atmospheric pressure reduces and leads to.
Description
Technical Field
The utility model relates to an electronic equipment design field especially relates to an engine oil feeding system, engine oil injection system and engine.
Background
In existing engines, particularly fuel (e.g., diesel) engines, a high pressure oil pump is typically used to convert low pressure fuel (e.g., low pressure diesel) from a fuel tank to high pressure fuel, which is then delivered via a high pressure fuel line into an engine common rail and ultimately into a fuel injector for injection.
The existing engine fuel system mainly comprises an oil tank, a fuel coarse filter, a common electric pump, a fuel delivery pump, a fuel fine filter, a fuel injection pump, a common rail pipe, a fuel injector and the like. When the diesel engine works, the fuel delivery pump generates negative pressure to suck fuel oil into the oil inlet pipe from the oil tank, and the fuel oil enters the fuel delivery pump after passing through the fuel oil coarse filter and then enters the diesel engine.
However, the existing engine fuel system can cause insufficient fuel supply of the fuel system under the high altitude environment of the plateau with reduced atmospheric pressure, so that the power of the engine is reduced and the power is insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model provides an engine oil feeding system, engine oil injection system and engine has guaranteed the fuel feeding ability of fuel delivery pump, has solved the not enough problem of fuel delivery pump fuel feeding ability because atmospheric pressure reduces and leads to.
An embodiment of the utility model provides an engine oil feeding system for in taking the medium in the oil tank out the sprayer, include: the system comprises a first oil transfer pump, a second oil transfer pump, a sensor assembly and a control module, wherein inlets of the first oil transfer pump and the second oil transfer pump are respectively connected with an oil tank, and an outlet of the first oil transfer pump is connected with an inlet of the second oil transfer pump;
the sensor assembly comprises a first pressure sensor, the first pressure sensor is electrically connected with the control module, and the first pressure sensor is used for detecting the external atmospheric pressure;
when the first pressure sensor detects that the external atmospheric pressure is smaller than a first pressure threshold value, the control module controls the first oil transfer pump to start working.
The embodiment of the utility model provides an engine oil feeding system, control module group include automatically controlled choke valve, and automatically controlled choke valve is used for controlling the aperture of first fuel delivery pump.
The embodiment of the utility model provides an engine oil feeding system, sensor module are still including setting up the second pressure sensor between first fuel delivery pump and second fuel delivery pump, and second pressure sensor is used for detecting the pressure between first fuel delivery pump and the second fuel delivery pump, and the control module group controls the aperture of automatically controlled choke valve according to the pressure numerical value that second pressure sensor detected.
The embodiment of the utility model provides an engine oil feeding system, the pressure value between first fuel delivery pump and the second fuel delivery pump has second pressure threshold value, and when second pressure sensor detected the pressure value between first fuel delivery pump and the second fuel delivery pump and the difference of second pressure threshold value was greater than a definite value, the aperture of automatically controlled choke valve was adjusted.
The embodiment of the utility model provides an engine oil feeding system, second pressure threshold value are the average value of the highest operating pressure threshold value between first fuel feed pump and the second fuel feed pump and the minimum operating pressure threshold value.
The embodiment of the utility model provides an engine oil feeding system, control module group are still including regularly self-checking module, regularly self-checking module and control module group link, and regularly self-checking module is used for controlling control module group and reads first pressure sensor's numerical value in the settlement time.
The embodiment of the utility model provides an engine oil feeding system still includes filtering component, and filtering component is used for filtering the medium.
The embodiment of the utility model provides an engine oil feeding system, filtering component include fuel coarse filter and fuel fine filter, and the fuel coarse filter is located the oil circuit between first fuel delivery pump and the oil tank, and the fuel fine filter is located the oil circuit between second fuel delivery pump and the sprayer.
The embodiment of the utility model also provides an engine oil injection system, including oil tank, high-pressure oil pump, common rail pipe, sprayer and above-mentioned engine oil supply system, the oil tank is connected with the entry of the fuel coarse filter of engine oil supply system, the input of high-pressure oil pump and the export of the fuel fine filter of engine oil supply system are connected;
the output end of the high-pressure oil pump is connected with the input end of the common rail pipe, and the output end of the common rail pipe is connected with the oil injector.
The embodiment of the utility model provides an engine is still provided, including foretell engine oil injection system.
The utility model provides an engine oil feeding system, including first fuel delivery pump, the second fuel delivery pump, sensor module and control module group, first pressure sensor in the sensor module is used for detecting external atmospheric pressure, when the pressure that first pressure sensor detected is less than first pressure threshold value, the control module group received first pressure sensor's signal and controlled first fuel delivery pump towards the entrance fuel delivery of second fuel delivery pump, the fuel feeding ability of fuel delivery pump has been guaranteed, the problem of fuel feeding ability not enough of fuel delivery pump because atmospheric pressure reduces and leads to has been solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural diagram of an engine oil supply system according to an embodiment of the present invention;
fig. 2 is a circuit diagram of an engine oil supply system according to an embodiment of the present invention;
fig. 3 is a schematic control flow diagram of an engine oil supply system according to an embodiment of the present invention.
Description of reference numerals:
1-an engine oil supply system;
2-an oil tank;
3-an oil injector;
4-a high-pressure oil pump;
5-common rail pipe;
10-a first oil transfer pump;
20-a second oil transfer pump;
30-a sensor assembly;
31-a first pressure sensor;
32-a second pressure sensor;
40-a control module;
41-an electronic control throttle valve;
42-timing self-test module;
50-a filter assembly;
51-a fuel oil coarse filter;
52-fine fuel filter.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or member must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
It should also be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as a fixed connection, a detachable connection, or an integral connection; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The existing engine fuel system mainly comprises an oil tank, a fuel coarse filter, a common electric pump, a fuel delivery pump, a fuel fine filter, a fuel injection pump, a common rail pipe, a fuel injector and the like. When the diesel engine works, the fuel delivery pump generates negative pressure to suck fuel oil into the oil inlet pipe from the oil tank, and the fuel oil enters the fuel delivery pump after passing through the fuel oil coarse filter and then enters the diesel engine. However, in the existing engine fuel system, under the high altitude environment of a plateau with reduced atmospheric pressure, the atmospheric pressure is reduced, the oil absorption capacity of a low-pressure fuel delivery pump of the fuel system is reduced, and when the inlet pressure of the fuel delivery pump is lower than a limit value, insufficient oil supply of the fuel system can be caused, so that the power of the engine is reduced and the power is insufficient; meanwhile, due to the fact that atmospheric pressure is reduced, a filter in front of the oil transfer pump needs to be replaced in advance, the service life is greatly reduced, and the vehicle maintenance cost is greatly increased.
The utility model provides an engine oil feeding system, engine oil injection system and engine has guaranteed the fuel feeding ability of fuel delivery pump, has solved the not enough problem of fuel delivery pump fuel feeding ability because atmospheric pressure reduces and leads to.
Fig. 1 is a schematic structural diagram of an engine oil supply system according to an embodiment of the present invention; fig. 2 is a circuit diagram of an engine oil supply system according to an embodiment of the present invention; fig. 3 is a schematic control flow diagram of an engine oil supply system according to an embodiment of the present invention. As shown in fig. 1 to 3, the present embodiment provides an engine oil supply system 1 for pumping a medium in a tank 2 to an injector 3, including: the oil tank control system comprises a first oil transfer pump 10, a second oil transfer pump 20, a sensor assembly 30 and a control module 40, wherein inlets of the first oil transfer pump 10 and the second oil transfer pump 20 are respectively connected with the oil tank 3, and an outlet of the first oil transfer pump 10 is connected with an inlet of the second oil transfer pump 20.
Specifically, the first oil delivery pump 10 and the second oil delivery pump 20 are respectively connected with the oil tank 3, and both the first oil delivery pump 10 and the second oil delivery pump 20 can pump out the medium in the oil tank 3 into a pipeline and spray the medium out of the oil injector 3, so that an oil path is formed. The outlet of the first fuel feed pump 10 is connected to the inlet of the second fuel feed pump 20, i.e. the first fuel feed pump 10 can feed the medium to the second fuel feed pump 20, so that a maximum fuel feed of the fuel feed pumps can be achieved.
In the prior art, when an engine is in a working scene of a plateau area, the pressure of a front-end inlet of a fuel delivery pump needs to be ensured so that the working state of the fuel delivery pump is close to that of a plain area. In order to ensure that the engine can be suitable for the working conditions of plateau and plain area, the sensor assembly 30 comprises a first pressure sensor 31, the first pressure sensor 31 is electrically connected with the control module 40, and the first pressure sensor 31 is used for detecting the atmospheric pressure outside. When the first pressure sensor 31 detects that the external atmospheric pressure is smaller than the first pressure threshold, the control module 40 controls the first oil delivery pump 10 to start operating.
Specifically, the first pressure sensor 31 is electrically connected to the control module 40, and the first pressure sensor 31 is used for detecting the atmospheric pressure outside. The first pressure sensor 31 has a first pressure threshold, which is a criterion for determining whether the engine is located in a plateau or a plain area. For example, the first pressure threshold is set to P0, when the first pressure sensor 31 detects that the external atmospheric pressure value P is greater than or equal to the first pressure threshold P0, the engine is determined to be in a plain area, and the second oil delivery pump 20 can meet the oil supply requirement of the engine; when the first pressure sensor 31 detects that the external atmospheric pressure value P is smaller than the first pressure threshold value P0, the engine is determined to be in the plateau area, and at this time, the second oil transfer pump 20 cannot meet the oil supply requirement of the engine, so that the first oil transfer pump 10 needs to be used to increase the maximum oil supply amount.
The first oil pump 10 is controlled by the control module 40, and the control module 40 receives a signal from the first pressure sensor 31 and then determines whether to open or close the first oil pump 10. For example, the first pressure threshold is set to P0, when the first pressure sensor 31 detects that the external atmospheric pressure value P is greater than or equal to the first pressure threshold P0, it is determined that the engine is in a plain area, and at this time, the second oil delivery pump 20 is normally operated, and the first oil delivery pump 10 is in a closed state; when first pressure sensor 31 detects that external atmospheric pressure value P is less than first pressure threshold value P0, then the engine is determined to be in the plateau area, second fuel delivery pump 20 can't satisfy the fuel feeding demand of engine this moment, first pressure sensor 31 is with signal transmission to control module 40, control module 40 controls first fuel delivery pump 10 towards the entrance fuel delivery of second fuel delivery pump 20, thereby the pressure of second fuel delivery pump 20 entrance has been improved, the fuel feeding ability of fuel delivery pump has been guaranteed, make the engine can normally work.
The utility model provides an engine oil feeding system, including first fuel delivery pump 10, second fuel delivery pump 20, sensor module 30 and control module group 40, first pressure sensor 31 in the sensor module 30 is used for detecting external atmospheric pressure, when the pressure that first pressure sensor 31 detected is less than first pressure threshold value, control module group 40 receives first pressure sensor 31's signal and controls first fuel delivery pump 10 towards the entrance fuel delivery of second fuel delivery pump 20, the fuel feeding ability of fuel delivery pump has been guaranteed, the not enough problem of fuel feeding ability of fuel delivery pump that leads to because atmospheric pressure reduces has been solved.
Various possible implementations of the engine oil supply system 1 are explained below.
When the engine is in operation, the first pressure sensor 31 in the sensor assembly 30 detects the atmospheric pressure outside, so as to determine the usage environment of the engine. When the use environment of the engine is judged to be in the plateau environment, the control module 40 controls the first oil transfer pump 10 to work, so that the oil supply capacity at the inlet of the second oil transfer pump 20 is increased, and the power of the engine is ensured. However, if the pressure of the first fuel pump 10 is too high, that is, the pressure at the inlet of the second fuel pump 20 is too high, the reliability of the fuel pumps is reduced, and the open failure of the common rail pressure limiting valve due to the too high rail pressure is likely to occur. In order to further regulate the opening and closing of the first oil delivery pump 10, the control module 40 optionally includes an electronically controlled throttle valve 41, and the electronically controlled throttle valve 41 is used for controlling the opening degree of the first oil delivery pump 10.
The electronically controlled throttle 41 controls the opening of the first fuel delivery pump 10, thereby adjusting the fuel supply pressure at the inlet of the second fuel delivery pump 20. For example, when the usage environment of the engine is judged to be in the plateau environment, the control module 40 controls the first oil delivery pump 10 to operate, and the opening degree of the electronically controlled throttle valve 41 of the first oil delivery pump 10 is n 0. When the pressure at the inlet of the second oil delivery pump 20 is too high, the opening degree of the first oil delivery pump 10 can be reduced through the electronically controlled throttle 41, and the pressure of the medium input by the first oil delivery pump 10 to the second oil delivery pump 20 is reduced, so that the pressure at the inlet of the second oil delivery pump 20 is reduced; when the pressure at the inlet of the second oil delivery pump 20 is too small, the opening degree of the first oil delivery pump 10 can be increased by the electronically controlled throttle 41, and at this time, the pressure of the medium input from the first oil delivery pump 10 to the second oil delivery pump 20 becomes large, so that the pressure at the inlet of the second oil delivery pump 20 is increased, and the oil supply capacity is ensured.
In order to realize the automatic adjustment of the opening degree of the electronically controlled throttle valve 41, optionally, the sensor assembly 30 further includes a second pressure sensor 32 disposed between the first oil delivery pump 10 and the second oil delivery pump 20, the second pressure sensor 32 is configured to detect a pressure between the first oil delivery pump 10 and the second oil delivery pump 20, and the control module 40 controls the opening degree of the electronically controlled throttle valve 10 according to a pressure value detected by the second pressure sensor 32.
Specifically, the second pressure sensor 32 detects the pressure between the first oil pump 10 and the second oil pump 20, that is, the pressure at the inlet of the second oil pump 20. When the pressure at the inlet of the second oil delivery pump 20 is detected to be excessive, the control module 40 controls the opening of the electronically controlled throttle valve 41 to be reduced by δ n, so that the pressure at the inlet of the second oil delivery pump 20 can be reduced. Similarly, when the pressure at the inlet of the second oil pump 20 is detected to be too low, the control module 40 controls the opening of the electronically controlled throttle 41 to increase δ n, so as to increase the pressure at the inlet of the second oil pump 20.
During operation of the second oil supply pump 20, the second oil supply pump 20 has a minimum operating pressure and a maximum operating pressure during normal operation. The second oil feed pump 20 can be normally operated when the pressure at the inlet of the second oil feed pump 20 is between the highest working pressure and the lowest working pressure. Optionally, the pressure value between the first oil delivery pump 10 and the second oil delivery pump 20 has a second pressure threshold, and when the second pressure sensor 32 detects that the difference between the pressure value between the first oil delivery pump 10 and the second oil delivery pump 20 and the second pressure threshold is greater than a certain value, the opening of the electronically controlled throttle valve 31 is adjusted.
Illustratively, the actual pressure value at the inlet of the second oil feed pump 20 is p, and the second pressure threshold value is p 0. When the difference between the second pressure threshold value p0 and the actual pressure value p is greater than a predetermined value, the opening of the electronically controlled throttle valve 41 is adjusted. The second pressure threshold p0 is determined by an average value of the highest working pressure and the lowest working pressure of the second oil pump 20, when a difference between the second pressure threshold p0 and the actual pressure value p is smaller than a certain value, δ p is taken as an example, when a difference between the second pressure threshold p0 and the actual pressure value p is smaller than δ p, that is, a difference between the actual pressure value p and the average value p0 of the highest working pressure and the lowest working pressure of the second oil pump 20 is smaller than a difference between the average value p0 and the highest working pressure and the lowest working pressure. At this time, the electronically controlled throttle valve 41 is kept at the normal opening, and the second fuel pump 20 operates normally. When the difference between the second pressure threshold value p0 and the actual pressure value p is greater than δ p, i.e. the difference between the actual pressure value p and the average value p0 of the highest working pressure and the lowest working pressure of the second oil feed pump 20 is greater than the difference between the average value p0 and the highest working pressure and the lowest working pressure, the actual pressure value p is greater than the highest working pressure of the second oil feed pump 20, or the actual pressure value p is less than the lowest working pressure of the second oil feed pump 20. Accordingly, the opening degree of the electronically controlled throttle valve 41 is changed accordingly, and the adjustment of the difference between the second pressure threshold value p0 and the actual pressure value p is completed, so that the second oil delivery pump operates normally.
Optionally, the control module 40 further includes a timing self-test module 42, the timing self-test module 42 is connected to the control module 40, and the timing self-test module 42 is configured to control the control module 40 to read the value of the first pressure sensor 31 within a set time.
In the above embodiment, the engine oil supply system 1 may further include the filter assembly 50, and the filter assembly 50 is used for filtering the medium. The filter assembly 40 includes a fuel coarse filter 41 and a fuel fine filter 42, the fuel coarse filter 41 is located on the oil path between the first fuel delivery pump 10 and the oil tank 2, and the fuel fine filter 42 is located on the oil path between the second fuel delivery pump 20 and the fuel injector 3. When the medium is drawn out of the oil tank 2, the medium is first filtered by the fuel strainer 41 and then transferred from the first fuel pump 10 to the second fuel pump 20. A fuel fine filter 42 is further disposed on the oil path between the second fuel delivery pump 20 and the fuel injector 3 to perform secondary filtration on the fuel and other media, so as to better filter out larger impurities or foreign matters in the fuel, thereby better protecting the fuel supply system.
The embodiment of the utility model also provides an engine oil injection system, including oil tank 2, high-pressure oil pump 4, common rail pipe 5, sprayer 3 and above-mentioned engine oil supply system 1, oil tank 2 is connected with the entry of the fuel coarse filter 51 of engine oil supply system 1, the input of high-pressure oil pump 4 is connected with the export of the fuel fine filter 42 of engine oil supply system 1; the output end of the high-pressure oil pump 4 is connected with the input end of the common rail pipe 5, and the output end of the common rail pipe 5 is connected with the oil injector 3.
The engine oil supply system included in the engine oil injection system in this embodiment has the same structure as the engine oil supply system provided in the above embodiment, and can bring about the same or similar technical effects, and therefore, the details are not repeated herein, and reference may be made to the description of the above embodiment specifically.
The embodiment of the utility model provides an engine is still provided, including foretell engine oil injection system.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. An engine oil supply system for pumping a medium from a tank to a fuel injector, comprising: the system comprises a first oil transfer pump, a second oil transfer pump, a sensor assembly and a control module, wherein inlets of the first oil transfer pump and the second oil transfer pump are respectively connected with an oil tank, and an outlet of the first oil transfer pump is connected with an inlet of the second oil transfer pump;
the sensor assembly comprises a first pressure sensor, the first pressure sensor is electrically connected with the control module, and the first pressure sensor is used for detecting the atmospheric pressure outside;
when the first pressure sensor detects that the external atmospheric pressure is smaller than a first pressure threshold value, the control module controls the first oil transfer pump to start working.
2. The engine oil supply system according to claim 1, wherein the control module includes an electrically controlled throttle valve for controlling an opening degree of the first oil feed pump.
3. The engine oil supply system according to claim 2, wherein the sensor assembly further includes a second pressure sensor disposed between the first oil feed pump and the second oil feed pump, the second pressure sensor being configured to detect a pressure between the first oil feed pump and the second oil feed pump, and the control module controls the opening of the electronically controlled throttle valve according to a pressure value detected by the second pressure sensor.
4. The engine oil supply system according to claim 3, wherein a pressure value between the first oil feed pump and the second oil feed pump has a second pressure threshold, and when the second pressure sensor detects that a difference between the pressure value between the first oil feed pump and the second pressure threshold is greater than a certain value, the opening of the electronically controlled throttle valve is adjusted.
5. The engine oil supply system of claim 4, wherein the second pressure threshold is an average of a highest operating pressure threshold and a lowest operating pressure threshold between the first and second fuel pumps.
6. The engine oil supply system according to claim 5, wherein the control module further comprises a timing self-check module, the timing self-check module is connected with the control module, and the timing self-check module is used for controlling the control module to read the value of the first pressure sensor within a set time.
7. The engine oil supply system according to any one of claims 1-6, further comprising a filter assembly for filtering the media.
8. An engine oil supply system as defined in claim 7, wherein the filter assembly includes a coarse fuel filter positioned in the oil path between the first fuel supply pump and the fuel tank and a fine fuel filter positioned in the oil path between the second fuel supply pump and the fuel injector.
9. An engine fuel injection system, comprising: the engine oil supply system comprises an oil tank, a high-pressure oil pump, a common rail pipe, an oil injector and the engine oil supply system according to any one of claims 1 to 8, wherein the oil tank is connected with an inlet of a fuel coarse filter of the engine oil supply system, and an input end of the high-pressure oil pump is connected with an outlet of a fuel fine filter of the engine oil supply system;
the output end of the high-pressure oil pump is connected with the input end of the common rail pipe, and the output end of the common rail pipe is connected with the oil injector.
10. An engine comprising the engine fuel injection system of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120021797.9U CN214533334U (en) | 2021-01-06 | 2021-01-06 | Engine oil supply system, engine oil injection system and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120021797.9U CN214533334U (en) | 2021-01-06 | 2021-01-06 | Engine oil supply system, engine oil injection system and engine |
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| Publication Number | Publication Date |
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| CN214533334U true CN214533334U (en) | 2021-10-29 |
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| CN202120021797.9U Active CN214533334U (en) | 2021-01-06 | 2021-01-06 | Engine oil supply system, engine oil injection system and engine |
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2021
- 2021-01-06 CN CN202120021797.9U patent/CN214533334U/en active Active
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