Oil pump, engine and vehicle

Abstract

The application provides an oil pump, an engine and a vehicle. The oil pump comprises a pump body assembly and a pump cover. One side of the pump body assembly is provided with an exhaust cavity. The pump cover is connected to the side of the pump body assembly provided with the exhaust cavity, and the pump cover is configured to close the exhaust cavity. At least one of the pump cover and the pump body assembly is provided with an exhaust hole, and the exhaust hole communicates with the exhaust cavity.

Description

Technical Field

[0001] This application relates to the field of oil pump technology, and more particularly to an oil pump, engine, and vehicle. Background Technology

[0002] The oil in the booster chamber of the oil pump comes from the main oil passage of the engine block and the oil leakage from the high-pressure chamber of the oil pump. This oil contains some bubbles with a high gas content. The oil pressure in the main oil passage and the high-pressure chamber is higher than the oil pressure in the regulating chamber. When the oil flows from the high-pressure area to the low-pressure area, the oil pressure decreases, and the bubbles will expand (according to the ideal gas law). The bubbles may even expand to burst, which will directly affect the stability of the eccentric ring. The oil pressure fluctuation caused by this instantaneous volume change is difficult for the pilot valve to respond immediately to ensure the stability of the oil pressure, and the oil pressure will form high-frequency oscillation fluctuations. Utility Model Content

[0003] This application provides an oil pump, an engine, and a vehicle to solve the problem in the known art where the expansion of air bubbles in the oil causes high-frequency oscillations in oil pressure.

[0004] This application provides an oil pump, including a pump body assembly and a pump cover; one side of the pump body assembly is provided with a discharge chamber; the pump cover is connected to the side of the pump body assembly where the discharge chamber is provided, and the pump cover is configured to close the discharge chamber; at least one of the pump cover and the pump body assembly is provided with an exhaust port, and the exhaust port communicates with the discharge chamber.

[0005] In one possible implementation, the vent is located on the pump cover.

[0006] In one possible implementation, the vent extends from the side of the pump cover away from the pump body assembly to communicate with the venting chamber.

[0007] In one possible implementation, the vent is connected to a section of the exhaust chamber away from the ground, for discharging bubbles that rise to that section of the exhaust chamber away from the ground.

[0008] In one possible implementation, the direction of the vent hole's axis is set at an angle to the surface of the pump body assembly on the side where the exhaust chamber is located.

[0009] In one possible implementation, the pump body assembly includes a pump base and an eccentric ring. A movable groove is provided on one side of the pump base, and the eccentric ring is rotatably disposed in the movable groove. The outer wall of a portion of the eccentric ring, the inner wall of the movable groove, and the bottom wall of the movable groove together form the discharge chamber.

[0010] In one possible implementation, the vent is located on the pump base.

[0011] In one possible implementation, the vent extends from the end face of the pump base away from the ground to communicate with the exhaust chamber.

[0012] In one possible implementation, the eccentric ring includes a main body, a rotating part, and a first extension. One end of the rotating part is connected to the main body, and the other end of the rotating part is rotatably connected to the pump seat and abuts against the wall of the movable groove. One end of the first extension is connected to the main body, and the other end of the first extension abuts against the wall of the movable groove. The discharge chamber is formed between the first extension and the rotating part.

[0013] This application also provides an engine including the aforementioned oil pump.

[0014] This application also provides a vehicle including the aforementioned oil pump or the aforementioned engine.

[0015] In the oil pump of this application, an exhaust hole is opened on at least one of the pump cover and pump body assembly. The exhaust hole is connected to the expansion chamber. After the air bubbles in the oil in the expansion chamber are released, they are discharged from the exhaust hole. This avoids the air bubbles from expanding or even bursting in the expansion chamber and affecting the stability of the deflector ring, thereby avoiding high-frequency oscillations in the oil pressure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the oil pump of this application in one embodiment.

[0017] Figure 2 This is an exploded schematic diagram of the oil pump of this application in one embodiment.

[0018] Figure 3 This is a front view schematic diagram of the pump base of the oil pump of this application in one embodiment.

[0019] Figure 4 This is a top view of the pump base of the oil pump of this application in one embodiment.

[0020] Figure 5 for Figure 4 A cross-sectional view of the oil pump along the V-V direction.

[0021] Figure 6 This is a perspective view of the oil pump of this application in one embodiment.

[0022] Figure 7 for Figure 4 A cross-sectional view of the oil pump along the VII-VII direction.

[0023] Figure 8 This is a schematic diagram of the rotating assembly of the oil pump according to one embodiment of the present application.

[0024] Key component symbols: 100, Oil pump; X, First direction; Y, Second direction; Z, Third direction; P, Mounting surface; K1, First opening; K2, Third opening; K3, Sixth opening; K4, Second opening; K5, Fourth opening; K6, Fifth opening; T, Projection; 10, Pump body assembly; 101, Exhaust chamber; 102, Exhaust chamber; 103, Exhaust port; 11, Pump base; 110, Movable groove; 1101, First connecting port; 1102, Second connecting port; 1103, Low-pressure chamber; 1104, High-pressure chamber; 1105, Mounting groove; 111, First threaded hole; 112 113. First oil passage; 114. Second oil passage; 115. Third oil passage; 116. Mounting cavity; 117. Sixth oil passage; 118. Fourth oil passage; 119. Fifth oil passage; 12. Eccentric ring; 120. Receiving groove; 121. Main body; 122. Rotating part; 123. First extension; 124. Second extension; 13. Rotating assembly; 131. Drive shaft; 132. Rotor; 1320. Sliding groove; 133. Blade; 134. Positioning ring; 14. Pilot valve assembly; 141. Valve seat; 142. Elastic element; 143. Pilot valve core; 20. Pump cover; 21. Second threaded hole.

[0025] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0026] The following description will refer to the accompanying drawings to provide a more complete picture of the present application. The drawings illustrate exemplary embodiments of the present application. However, the present application may be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. The same reference numerals denote the same or similar components.

[0027] The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to limit the application. As used herein, unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to also include the plural forms. Furthermore, when used herein, “comprising” and / or “including” and / or “having,” integers, steps, operations, components, and / or components, but does not exclude the presence or addition of one or more other features, regions, integers, steps, operations, components, and / or groups thereof.

[0028] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. Furthermore, unless expressly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as they have in the relevant art and in the content of this application, and will not be interpreted as having an idealized or overly formal meaning.

[0029] The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 3 As shown, this embodiment provides an oil pump 100, including a pump body assembly 10 and a pump cover 20.

[0031] For ease of reading, this application introduces a first direction X, a second direction Y, and a third direction Z to describe the embodiments of this application. The first direction X, the second direction Y, and the third direction Z can be three non-parallel straight lines in space; further, the first direction X, the second direction Y, and the third direction Z can be three mutually perpendicular directions in a three-dimensional coordinate system (a three-dimensional Cartesian coordinate system). In subsequent embodiments, the first direction X is described as the X-axis direction of the three-dimensional coordinate system, the second direction Y is the Y-axis direction of the three-dimensional coordinate system, and the third direction Z is the Z-axis direction of the three-dimensional coordinate system.

[0032] Along the first direction X, a booster chamber 101 is provided on one side of the pump body assembly 10. The booster chamber 101 can receive oil and discharge pressurized oil, such as engine oil. The engine oil received by the booster chamber 101 comes partly from the engine, and the engine oil is agitated by the high-speed rotation of components such as sprockets, chains, and balance shafts in the engine, resulting in air bubbles in the oil. When the engine oil enters the booster chamber 101 in the oil pump 100, the air bubbles will change shape due to the pressure reduction. For example, the air bubbles will grow larger or even burst. This will not only affect the working stability of the eccentric ring 12, but also affect the volume and oil pressure stability of the pressure regulating chamber of the oil pump 100, and thus affect the stability of the pressure regulating system of the oil pump 100. This will manifest as large oil pressure fluctuations in the engine, affecting the oil film stability of lubrication components such as the engine shaft system and the working state of hydraulic performance components such as hydraulic tappets, ultimately reducing the reliability of the engine and shortening its service life.

[0033] The pump cover 20 is connected to the side of the pump body assembly 10 where the discharge chamber 101 is provided, and the pump cover 20 is configured to close the discharge chamber 101. At least one of the pump cover 20 and the pump body assembly 10 is provided with a vent 103, which communicates with the discharge chamber 101 and is configured to allow air bubbles precipitated in the oil in the discharge chamber 101 to be discharged.

[0034] Thus, in the oil pump 100 of this application, by opening an exhaust hole 103 on at least one of the pump cover 20 and the pump body assembly 10, the exhaust hole 103 is connected to the expansion chamber 101. After the air bubbles in the oil in the expansion chamber 101 are released, they are discharged from the exhaust hole 103, which avoids the air bubbles from expanding or even bursting in the expansion chamber 101 and affecting the stability of the deflector ring, thereby avoiding the formation of high-frequency oscillations in the oil pressure.

[0035] Please combine Figures 1 to 3 In one embodiment, the pump body assembly 10 includes a pump base 11 and an eccentric ring 12. A movable groove 110 is provided on one side of the pump base 11, and the eccentric ring 12 is rotatably disposed in the movable groove 110. The outer wall of a portion of the eccentric ring 12, the inner wall of the movable groove 110, and the bottom wall of the movable groove 110 together form a discharge chamber 101.

[0036] Along the first direction X, one side surface of the pump base 11 is designated as the mounting surface P, the movable groove 110 extends inward from the mounting surface P, and the extension length of the movable groove 110 is less than the thickness of the pump base 11 in the first direction X.

[0037] The pump cover 20 is fitted to the mounting surface P to close the opening of the movable groove 110, and the pump cover 20 is detachably connected to the pump base 11. The mounting surface P is provided with a plurality of first threaded holes 111, and the pump cover 20 is provided with a plurality of second threaded holes 21. The plurality of first threaded holes 111 and the plurality of second threaded holes 21 are correspondingly arranged, and the first threaded holes 111 and the corresponding second threaded holes 21 are threaded with the same bolt or other fastener to achieve the detachable connection between the pump cover 20 and the pump base 11.

[0038] In this embodiment, the eccentric ring 12 includes a main body 121, a rotating part 122, and a first extension 123, and the main body 121, the rotating part 122, and the first extension 123 are integrally formed. Along the first direction X, the end face of the main body 121 away from the mounting surface P abuts against the bottom wall of the movable groove 110, the end face of the rotating part 122 away from the mounting surface P abuts against the bottom wall of the movable groove 110, and the end face of the first extension 123 away from the mounting surface P abuts against the bottom wall of the movable groove 110, so as to ensure the sealing of the subsequently formed drainage cavity 101.

[0039] Furthermore, the eccentric ring 12 also includes a second extension 124, which is integrally formed with the main body 121. Along the first direction X, the end face of the first extension 123 away from the mounting surface P abuts against the bottom wall of the movable groove 110.

[0040] The main body 121 is rotatable within the movable groove 110, and a gap is provided between the outer peripheral surface of the main body 121 and the groove wall of the movable groove 110. The rotating part 122, the first extension 123, and the second extension 124 are all integrally formed on the outer peripheral surface of the main body 121, and are arranged sequentially at intervals around the axis of the main body 121. The rotating part 122 is located approximately at the top end of the main body 121, and the first extension 123 and the second extension 124 are located approximately at the bottom end of the main body 121.

[0041] One end of the rotating part 122 is integrally formed on the outer peripheral surface of the main body 121, and the other end of the rotating part 122 is rotatably connected to the pump base 11 and abuts against the groove wall of the movable groove 110. The groove wall of the movable groove 110 has a mounting groove 1105, which communicates with the movable groove 110, and the shape of the mounting groove 1105 is approximately semi-circular. The end of the rotating part 122 away from the main body 121 is rotatably housed in the movable groove 110, and the rotating part 122 can be rotatably connected to the pump base 11 via a pin or other shaft, so as to realize the eccentric ring 12 swinging back and forth around the axis of the pin.

[0042] Specifically, the end face of the rotating part 122 away from the main body 121 abuts against the groove wall of the mounting groove 1105 to ensure the sealing between the rotating part 122 and the groove wall of the mounting groove 1105.

[0043] One end of the first extension 123 is integrally formed on the outer peripheral surface of the main body 121, and the other end of the first extension 123 abuts against the groove wall of the movable groove 110. The expansion cavity 101 is formed between the first extension 123 and the rotating part 122, so that the expansion cavity 101 is formed by the first extension 123, the rotating part 122, the outer peripheral surface of the main body 121, the groove wall of the movable groove 110, and the bottom wall of the movable groove 110. As the eccentric ring 12 swings, the position of the first extension 123 in the movable groove 110 changes, so that the volume of the expansion cavity 101 also changes.

[0044] The pump body assembly 10 also includes a reduction chamber 102, which is not connected to the increase chamber 101, and the pressure regulating chamber is composed of the reduction chamber 102 and the increase chamber 101. Along the second direction Y, the increase chamber 101 and the reduction chamber 102 are respectively located on opposite sides of the rotating part 122. One end of the second extension 124 is integrally formed on the outer peripheral surface of the main body 121, and the other end of the second extension 124 abuts against the groove wall of the movable groove 110. The reduction chamber 102 is formed between the second extension 124 and the rotating part 122, so that the reduction chamber 102 is formed by the second extension 124, the rotating part 122, the outer peripheral surface of the main body 121, the groove wall of the movable groove 110, and the bottom wall of the movable groove 110. As the eccentric ring 12 swings, the position of the second extension 124 in the movable groove 110 changes, so that the volume of the reduction chamber 102 also changes.

[0045] Specifically, the shape of the movable groove 110 needs to be designed according to the swing path of the eccentric ring 12 to ensure that during the swing of the eccentric ring 12, the first extension 123 and the second extension 124 both abut against the groove wall of the movable groove 110, thereby ensuring that the oil in the discharge reduction chamber 102 and the discharge increase chamber 101 will not leak.

[0046] Please combine Figures 1 to 3 In one embodiment, the vent 103 is provided on the pump cover 20.

[0047] Along the first direction X, the vent 103 penetrates the pump cover 20 from the side away from the pump body assembly 10. When the pump cover 20 is connected to the pump base 11, the vent 103 connects to the discharge chamber 101. Since the pump cover 20 closes the discharge chamber 101, the oil in the discharge chamber 101 will come into contact with the pump cover 20. When the vent 103 penetrates the pump cover 20 from the side away from the pump body assembly 10, air bubbles in the oil will gather in the area of ​​the pump cover 20 where the vent 103 is provided, thereby causing the air bubbles to be quickly discharged from the vent 103.

[0048] The vent hole 103 is angled to the mounting surface P. When the angle is 90°, the length of the vent hole 103 is reduced, decreasing the travel length of the bubble within the vent hole 103 and thus improving the bubble discharge efficiency. It is understood that in other embodiments, the angle can also be set to 95° or 85°, or other angles, and the specific value of the angle can be selected according to actual needs.

[0049] In this embodiment, the vent 103 connects to the section of the exhaust chamber 101 furthest from the ground, allowing air bubbles that have floated to this section to be discharged. Specifically, along the first direction X, the projection T of the vent wall of the vent 103 onto the bottom wall of the movable groove 110 is located in the section of the exhaust chamber 101 furthest from the ground. This allows air bubbles in the exhaust chamber 101 to float upwards towards the side furthest from the ground under their own buoyancy when a large amount of engine oil is stored there. These bubbles then rise to the vent 103 and are subsequently discharged from it. According to Stokes' law and the principle of buoyancy, the density of air bubbles is much smaller than that of engine oil, creating an upward buoyancy force that overcomes the viscous resistance of the oil, allowing the air bubbles to float.

[0050] The active groove 110 has a first connecting port 1101 on its groove wall, which connects to the exhaust chamber 101. Engine oil can enter the exhaust chamber 101 through the first connecting port 1101. The first connecting port 1101 connects to the section of the exhaust chamber 101 near the ground, that is, the first connecting port 1101 is located near the first extension 123, so that the engine oil entering the exhaust chamber 101 through the first connecting port 1101 accumulates in the exhaust chamber 101 and gradually fills the exhaust chamber 101. The air bubbles rise to the exhaust port 103 under their own buoyancy and are discharged.

[0051] In this embodiment, the vent hole 103 is a round hole, and the diameter of the vent hole 103 is 0.5mm to 2mm. The diameter of the vent hole 103 is set within this range to avoid the vent hole 103 being too small, which would be not conducive to the discharge of air bubbles, and to avoid the vent hole 103 being too large, which would cause a lot of oil in the exhaust chamber 101 to leak out from the vent hole 103.

[0052] It is understandable that the diameter of the vent hole 103 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, etc.

[0053] It is understood that in other embodiments, the shape of the exhaust port 103 may also be elliptical, rectangular, or other regular or irregular shapes.

[0054] In another embodiment, the vent 103 is provided on the pump base 11.

[0055] Along the third direction Z, the vent 103 extends downward from the end face of the pump seat 11 away from the ground to the communication chamber 101, so that the rising air bubbles can move from the vent 103 to leave the chamber 101.

[0056] It is worth noting that the top surface of the pump base 11 is provided with a dustproof structure to block the exhaust port 103 and prevent external dust and other impurities from falling into the exhaust chamber 101 from the exhaust port 103.

[0057] It is understood that in other embodiments, along the first direction X, the exhaust port 103 may also be provided on the side of the pump seat 11 away from the mounting surface P, and the exhaust port 103 penetrates the pump seat 11 to the communication exhaust chamber 101.

[0058] Please combine Figures 4 to 7 In one embodiment, the wall of the movable groove 110 is provided with a second communication port 1102, which connects to the emission reduction chamber 102. The second communication port 1102 connects to the section of the emission reduction chamber 102 away from the ground, that is, the second communication port 1102 is located near the rotating part 122.

[0059] The mounting surface P has a first oil passage 112 and a second oil passage 113. The first oil passage 112 is connected to the first connecting port 1101, and the second oil passage 113 is connected to the second connecting port 1102.

[0060] The pump body assembly 10 also includes a pilot valve assembly 14. A mounting cavity 115 is provided within the pump seat 11, and the pilot valve assembly 14 is located within the mounting cavity 115. The pilot valve assembly 14 is used to adjust the displacement of the oil pump 100. The pilot valve assembly 14 includes a valve seat 141, an elastic element 142, and a pilot valve core 143. The valve assembly is located within the mounting cavity 115. The elastic element 142 is a spring, and it is positioned along the third direction Z. One end of the elastic element 142 is elastically connected to the valve seat 141, and the other end is elastically connected to the pilot valve core 143, so that the elastic element 142 provides an elastic force to the pilot valve core 143 to move along the third direction Z.

[0061] The pump base 11 is provided with a third oil passage 114 and a fourth oil passage 117. One end of the third oil passage 114 is connected to the first oil passage 112, and the other end of the third oil passage 114 is connected to the mounting cavity 115. The top surface of the pump base 11 has a first opening K1 and a second opening K4. One end of the fourth oil passage 117 is connected to the mounting cavity 115, and the other end of the fourth oil passage 117 is connected to the first opening K1. The middle section of the fourth oil passage 117 is also connected to the second opening K4.

[0062] Furthermore, a fifth opening K6 is provided on one side of the pump base 11 along the second direction Y, and the fifth opening K6 connects to the mounting cavity 115. The second opening K4 and the fifth opening K6 can be sealed by rubber plugs or the like.

[0063] Thus, when the oil pump 100 is in high-pressure mode, the expansion chamber 101 is filled with oil, and oil flows through the fourth oil passage 117, the third oil passage 114, and the first oil passage 112, allowing oil to enter the expansion chamber 101. If the oil pressure increases, the compression of the elastic element 142 increases, the flow rate of oil into the expansion chamber 101 decreases, the eccentric ring 12 swings to the right, the eccentricity decreases, the displacement of the oil pump 100 decreases, and the oil pressure drops to an equilibrium state. When the oil pressure decreases, the flow rate of oil into the expansion chamber 101 increases, the displacement of the oil pump 100 increases, and the oil pressure increases to an equilibrium state, thereby maintaining a high oil pressure dynamic balance.

[0064] In this embodiment, a fifth oil passage 118 is provided inside the pump base 11, and a third opening K2 and a fourth opening K5 are provided on the top surface of the pump base 11. One end of the fifth oil passage 118 is connected to the second oil passage 113, and the other end of the fifth oil passage 118 is connected to the third opening K2. The middle section of the fifth oil passage 118 is also connected to the fourth opening K5. The fourth opening K5 can be sealed by a rubber stopper or the like.

[0065] Thus, when the oil pump 100 is in low-pressure mode, both the expansion chamber 101 and the reduction chamber 102 are filled with oil. Oil flows through the fourth oil passage 117, the third oil passage 114, and the first oil passage 112, as well as the fifth oil passage 118 and the second oil passage 113. The oil pump 100 maintains a low oil pressure dynamic balance by relying on the elastic force provided by the elastic element 142 and the balance of oil pressure. In high-pressure and low-pressure modes, the elastic element 142 is compressed and maintained at its corresponding equilibrium position, maintaining a stable oil pressure.

[0066] In this embodiment, the bottom wall of the movable groove 110 is provided with a high-pressure chamber 1104 and a low-pressure chamber 1103. The high-pressure chamber 1104 serves as an oil outlet chamber and is connected to the discharge reduction chamber 102. The low-pressure chamber 1103 serves as an oil suction chamber and is connected to the discharge increase chamber 101.

[0067] The top surface of the pump base 11 has a sixth opening K3, and the pump base 11 has a sixth oil passage 116. The high pressure chamber 1104 can be connected to the sixth opening K3 through the sixth oil passage 116.

[0068] Please combine Figures 5 to 8 and combined Figure 2 In one embodiment, the pump body assembly 10 further includes a rotating assembly 13. The rotating assembly 13 includes a drive shaft 131, a rotor 132, a positioning ring 134, and a plurality of blades 133.

[0069] The drive shaft 131 is arranged along the first direction X, and the rotor 132 is fixed to the outer peripheral surface of the drive shaft 131. The rotor 132 is coaxially arranged with the drive shaft 131 so as to drive the rotor 132 to rotate around the axis of the drive shaft 131 via the drive shaft 131.

[0070] An eccentric ring 12 has a receiving groove 120, and a rotor 132 is located within the receiving groove 120, with the rotor 132 being eccentrically positioned relative to the eccentric ring 12. The outer circumferential surface of the rotor 132 is spaced apart from the groove wall of the receiving groove 120, and multiple sliding grooves 1320 are formed on the outer circumferential surface of the rotor 132. These sliding grooves 1320 are arranged sequentially and at intervals around the axis of the rotor 132. Each sliding groove 1320 corresponds to a multiple blade 133. One end of each blade 133 abuts against the inner wall of the eccentric ring 12, and the other end of each blade 133 is slidably disposed within the sliding groove 1320. This allows the rotor 132 to rotate, driving the blades 133 to slide radially along the rotor 132, thereby enabling the multiple blades 133 to work together to achieve the oscillation of the eccentric ring 12.

[0071] Along the first direction X, a positioning ring 134 is disposed on the side of the rotor 132 near the pump cover 20, and the positioning ring 134 is sleeved on the outer periphery of the drive shaft 131. Along the first direction X, the end of the blade 133 near the pump cover 20 extends beyond the rotor 132, so that the end of the blade 133 away from the eccentric ring 12 can abut against the outer peripheral surface of the positioning ring 134. Thus, the positioning ring 134 abuts against the end of each blade 133 away from the eccentric ring 12 to ensure that the sliding distance of each blade 133 is within a preset range.

[0072] It is worth noting that the oil in the booster chamber 101 comes not only from the main oil passage of the engine block that enters from the fourth oil passage 117, the third oil passage 114, and the first oil passage 112, but also from the high-pressure chamber 1104. The oil in the high-pressure chamber 1104 may leak into the booster chamber 101 from the end face gap formed between the rotor 132, the eccentric ring 12, the blade 133 and the pump seat 11 and the pump cover 20.

[0073] The specific effects of this application are explained below: In a single-unit test of the oil pump 100, pure oil without air bubbles and oil with a 20% air content were introduced. The test revealed that the oil pressure did not fluctuate when the oil without air bubbles was introduced, while the oil with a 20% air content caused a drastic fluctuation of ±50 kPa. This confirmed that the cause of the fluctuation was air bubbles in the oil. Using the oil pump 100 with the vent 103 provided in this application, the oil pressure fluctuation was reduced from ±50 kPa to ±6 kPa, demonstrating a significant effect. Furthermore, the improvement effect of this application on the engine is consistent with the results of the single-unit test.

[0074] This embodiment also provides an engine, including the aforementioned oil pump 100. Based on the good stability of the oil pump 100's pressure regulation system, large oil pressure fluctuations are less likely to occur in the engine, ensuring the stability of the oil film on lubrication components such as the engine's shaft system and the working condition of hydraulic components such as hydraulic tappets, ultimately guaranteeing engine reliability and improving engine lifespan.

[0075] It is understood that in this embodiment, the engine also includes other necessary components and structures besides the oil pump 100 for realizing the functions of the engine, such as crankshaft, camshaft, piston, etc.

[0076] This embodiment also provides a vehicle, including the aforementioned oil pump 100 or the aforementioned engine. The oil pump 100 or the engine is mounted on the vehicle body.

[0077] The specific embodiments of this application have been described above with reference to the accompanying drawings. However, those skilled in the art will understand that various changes and substitutions can be made to the specific embodiments of this application without departing from the scope of this application. All such changes and substitutions fall within the scope defined by this application.

Claims

1. An oil pump, characterized in that, include: The pump body assembly has a discharge chamber on one side; A pump cover is connected to the side of the pump body assembly where the discharge chamber is provided, and the pump cover is configured to close the discharge chamber; At least one of the pump cover and the pump body assembly is provided with an exhaust port, which is connected to the exhaust chamber.

2. The oil pump as described in claim 1, characterized in that, The vent is located on the pump cover.

3. The oil pump as described in claim 2, characterized in that, The vent extends from the side of the pump cover away from the pump body assembly to communicate with the exhaust chamber.

4. The oil pump as described in claim 3, characterized in that, The vent is connected to the section of the exhaust chamber away from the ground, and is used to discharge bubbles that rise to the section of the exhaust chamber away from the ground.

5. The oil pump as described in claim 2, characterized in that, The direction of the exhaust port's axis is set at an angle to the surface of the pump body assembly on the side where the exhaust chamber is located.

6. The oil pump as described in claim 1, characterized in that, The pump body assembly includes a pump base and an eccentric ring. A movable groove is provided on one side of the pump base, and the eccentric ring is rotatably disposed in the movable groove. The outer wall of a portion of the eccentric ring, the inner wall of the movable groove, and the bottom wall of the movable groove together form the discharge chamber.

7. The oil pump as described in claim 6, characterized in that, The vent is located on the pump base.

8. The oil pump as described in claim 7, characterized in that, The vent extends from the end face of the pump base away from the ground to the venting chamber.

9. The oil pump as described in claim 6, characterized in that, The eccentric ring includes a main body, a rotating part, and a first extension. One end of the rotating part is connected to the main body, and the other end of the rotating part is rotatably connected to the pump seat and abuts against the wall of the movable groove. One end of the first extension is connected to the main body, and the other end of the first extension abuts against the wall of the movable groove. The discharge chamber is formed between the first extension and the rotating part.

10. An engine, characterized in that, Includes the oil pump as described in any one of claims 1 to 9.

11. A vehicle, characterized in that, This includes the oil pump as described in any one of claims 1 to 9 or the engine as described in claim 10.

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