Reversible check valve, connecting rod, engine and automobile

Abstract

This invention discloses a reversible one-way valve, a connecting rod, an engine, and an automobile, belonging to the field of engine technology. The reversible one-way valve includes a valve body and a valve shaft. A valve shaft mounting cavity is provided within the valve body. A first flow channel, a second flow channel, and a third flow channel are provided on the outer circumferential surface of the valve body. All three flow channels penetrate the sidewall of the valve body and extend to the valve shaft mounting cavity. A first valve ball is provided in the second flow channel, allowing fluid to flow in only one direction. A second valve ball is provided in the third flow channel, allowing fluid to flow in only one direction. The valve shaft is movably mounted in the valve shaft mounting cavity along its own axis. A valve shaft flow channel is provided on the outer circumferential surface of the valve shaft. The first flow channel communicates with the valve shaft flow channel. The valve shaft can move along its own axis to switch between a first state and a second state. This invention achieves unidirectional flow control of fluid in three pipelines through a single reversible one-way valve, and the reversible one-way valve is quick and easy to install.

Description

Technical Field

[0001] This invention relates to the field of engine technology, and more particularly to a reversible one-way valve, a connecting rod, an engine, and an automobile. Background Technology

[0002] In pipeline connections, it is necessary to control the selective flow of fluid from the first pipeline into the second pipeline or into the third pipeline, and to control the second and third pipelines to be unidirectional. The common practice is to install a three-way valve at the connection of the three pipelines, and at the same time install a one-way valve in both the second and third pipelines.

[0003] The above-mentioned pipeline connection requires the installation of a three-way valve and two check valves, resulting in a number of installation steps and affecting installation efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a reversible check valve, a connecting rod, an engine, and an automobile, wherein the reversible check valve can be quickly installed at the connection of three pipelines and the fluid flow direction at the connection of the three pipelines is controllable.

[0005] Based on the above concept, the technical solution adopted by this invention is as follows:

[0006] A reversible check valve can be installed at the connection of three pipelines, the three pipelines including an input pipeline and a first output pipeline and a second output pipeline disposed at the outlet of the input pipeline, the reversible check valve comprising:

[0007] The valve body has a valve shaft mounting cavity. A first flow channel, a second flow channel, and a third flow channel are provided on the outer circumferential surface of the valve body. The first flow channel is used to connect to the input pipeline, the second flow channel is used to connect to the first output pipeline, and the third flow channel is used to connect to the second output pipeline. The first, second, and third flow channels all penetrate the sidewall of the valve body and extend to the valve shaft mounting cavity. A first valve ball is provided in the second flow channel, allowing fluid to flow in only one direction. A second valve ball is provided in the third flow channel, allowing fluid to flow in only one direction.

[0008] A valve shaft is movably disposed in the valve shaft mounting cavity along its own axis. A valve shaft flow channel is provided on the outer peripheral surface of the valve shaft. The first flow channel is connected to the valve shaft flow channel. The valve shaft can move along its own axis to switch between a first state and a second state.

[0009] In the first state, the valve shaft flow channel is simultaneously connected to the first flow channel and the third flow channel, and the fluid via the reversible check valve can only flow out from the third flow channel;

[0010] In the second state, the valve shaft flow channel is simultaneously connected to both the first flow channel and the second flow channel, and the fluid via the reversible check valve can only flow out from the second flow channel.

[0011] Linkage, the link comprising:

[0012] A connecting rod body, one end of which is provided with a first connecting hole for connecting with the piston of an engine, and the other end of which is provided with a second connecting hole. An eccentric bushing is rotatably disposed in the second connecting hole and configured to connect with the crankshaft of the engine. The eccentric bushing can rotate around the central axis of the second connecting hole so that the position of the center point of the eccentric bushing changes. An oil chamber is provided inside the connecting rod body.

[0013] An eccentric bushing rotation limiting mechanism includes a limiting member connected to the eccentric bushing. The limiting member is movably disposed within the oil cavity and can extend and retract relative to the oil cavity to limit the rotation angle of the eccentric bushing.

[0014] The connecting rod body is provided with a first oil passage and a second oil passage communicating with the oil cavity. The first oil passage and the second oil passage are connected by the aforementioned reversible one-way valve. One end of the first oil passage is connected to the second flow channel and the other end is connected to the oil cavity. One end of the second oil passage is connected to the third flow channel and the other end is connected to the oil cavity. The fluid entering the oil cavity from the second oil passage can apply a force to the limiting member in a first direction, and the fluid entering the oil cavity from the first oil passage can apply a force to the limiting member in a second direction. The first direction is opposite to the second direction.

[0015] The reversible check valve is configured such that: engine oil enters the reversible check valve through the first flow channel; in a first state, it controls the engine oil to supply oil to the second oil passage, and causes the eccentric bushing to rotate only in a first clockwise direction; in a second state, it controls the engine oil to supply oil to the first oil passage, and causes the eccentric bushing to rotate only in a second clockwise direction, the first clockwise direction being opposite to the second clockwise direction.

[0016] An engine, including a piston and a crankshaft, and also including the aforementioned connecting rod, wherein the piston is connected to a first connecting hole of the connecting rod, and the crankshaft is fixedly sleeved on the eccentric bushing.

[0017] Automobiles, including the aforementioned engines.

[0018] The beneficial effects of this invention are:

[0019] In practical applications, the reversible check valve proposed in this invention is installed at the connection of three pipelines: the first flow channel is connected to the input pipeline, the first output pipeline is connected to the second flow channel, and the second output pipeline is connected to the third flow channel. By controlling the valve shaft to switch between the first and second states, the flow of fluid entering the reversible check valve can be controlled to flow out of either the second or third flow channel. When the fluid flows out of the second flow channel, it can only flow unidirectionally within the second flow channel. When the fluid flows out of the third flow channel, it can only flow unidirectionally within the third flow channel.

[0020] The connecting rod proposed in this invention incorporates a reversible one-way valve within its body. This valve allows engine oil to selectively enter either the second or third flow channel, thereby controlling the selective flow of engine oil into either the first or second oil passage. When engine oil is supplied to the first oil passage, the oil within the first passage enters the oil chamber, causing the eccentric bushing to rotate only in a second clockwise direction. Conversely, when engine oil is supplied to the second oil passage, the oil within the second passage enters the oil chamber, causing the eccentric bushing to rotate only in a first clockwise direction. This design ensures that the eccentric bushing can rotate only in one direction during rotation, preventing back-and-forth oscillations that could affect the stability of the connecting rod center distance adjustment.

[0021] The engine proposed in this invention includes the aforementioned connecting rod, and the reversible one-way valve at the connecting rod is quick and easy to install. The engine's center distance is variable, thereby allowing for a variable compression ratio. The engine can achieve better efficiency under various changing operating conditions. In actual operation, it is necessary to select the most suitable compression ratio according to different engine operating conditions to obtain good thermal efficiency and achieve a balance between economy and power.

[0022] The automobile proposed in this invention includes the aforementioned engine, and the reversible one-way valve at the engine connecting rod is quick and easy to install, while the automobile balances economy and power. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a reversible check valve when the valve shaft is in the first state, provided by an embodiment of the present invention.

[0024] Figure 2 yes Figure 1 A diagram from another perspective;

[0025] Figure 3 yes Figure 2 A schematic diagram of the valve shaft with the valve body hidden.

[0026] Figure 4 yes Figure 3 A schematic diagram of the valve shaft from another perspective;

[0027] Figure 5 yes Figure 1 A cross-sectional schematic diagram of a certain section of a reversible check valve;

[0028] Figure 6 This is a structural schematic diagram of the valve shaft provided in another embodiment of the present invention;

[0029] Figure 7 This is a schematic diagram of the structure of a reversible check valve when the valve shaft is in the second state, provided by an embodiment of the present invention;

[0030] Figure 8 yes Figure 7 Cross-sectional view of the reversible check valve in the diagram Figure 1 ;

[0031] Figure 9 yes Figure 7 Cross-sectional view of the reversible check valve in the diagram Figure 2 ;

[0032] Figure 10 This is a schematic diagram of the valve body provided in an embodiment of the present invention.

[0033] Figure 11 This is a schematic diagram showing the maximum center distance of the connecting rods according to an embodiment of the present invention;

[0034] Figure 12 This is a schematic diagram showing the minimum center distance of the connecting rods provided in an embodiment of the present invention;

[0035] Figure 13 yes Figure 11 A schematic diagram from another perspective after the valve body is hidden;

[0036] Figure 14 This is a cross-sectional schematic diagram of the connecting rods at their maximum center distance according to an embodiment of the present invention;

[0037] Figure 15 yes Figure 14 Enlarged view of point A in the middle;

[0038] Figure 16 This is a schematic diagram of the connecting rod at its minimum center distance and the limiting member at its extreme retracted position, provided in an embodiment of the present invention.

[0039] Figure 17 yes Figure 13 A diagram from another perspective;

[0040] Figure 18 yes Figure 17 Enlarged view of point B in the middle;

[0041] Figure 19 This is a schematic diagram of the semi-ring structure provided in an embodiment of the present invention;

[0042] Figure 20 This is a schematic diagram of the main connecting rod provided in an embodiment of the present invention;

[0043] Figure 21 This is a schematic diagram of the eccentric bushing provided in an embodiment of the present invention;

[0044] In the picture:

[0045] 1. Connecting rod body; 11. Oil cavity; 111. First oil hole; 112. Second oil hole; 113. Protrusion; 115. Oil cavity sealant; 12. Second connecting hole; 13. First oil passage; 131. First hollow cavity; 132. Second hollow cavity; 14. Second oil passage; 141. Third hollow cavity; 142. Fourth hollow cavity; 143. Connecting hole; 15. Reversible check valve mounting hole; 16. First connecting hole; 17. Main connecting rod; 18. Semi-ring structure; 181. Connecting groove; 19. Limiting cavity;

[0046] 2. Eccentric bushing; 21. Inner ring oil groove; 22. Outer ring oil groove; 23. Connecting oil groove;

[0047] 31. Limiting component; 311. Flange; 312. Rotating pin; 32. Limiting connector;

[0048] 4. Reversible check valve;

[0049] 41. Valve body; 411. First flow channel; 412. Second flow channel; 4121. Second flow channel outlet; 4122. Second flow channel inlet; 4123. First valve ball; 413. Third flow channel; 4131. Third flow channel outlet; 4132. Third flow channel inlet; 4133. Second valve ball; 414. Perforation for movable limiting component; 415. Valve shaft mounting cavity; 416. First groove structure;

[0050] 42. Valve shaft; 421. Valve shaft flow channel; 4211. First section; 4212. Second section; 4213. Third section; 422. Moving limit groove; 43. Moving limit component. Detailed Implementation

[0051] Example 1

[0052] See Figures 1-10 This embodiment provides a reversible one-way valve, which can be installed at the connection of three pipelines to not only change the direction of fluid flow, but also restrict the one-way flow of fluid in the outflow pipeline.

[0053] See Figure 1 and Figure 2 This embodiment provides a reversible check valve.

[0054] This reversible check valve can be installed at the connection of three pipelines. The three pipelines include an input pipeline and a first output pipeline and a second output pipeline located at the outlet of the input pipeline. This reversible check valve can selectively control the fluid flowing out of the outlet of the input pipeline to flow into either the first output pipeline or the second output pipeline, and can control the fluid in the first output pipeline to flow in only one direction, and control the fluid in the second output pipeline to flow in only one direction.

[0055] Specifically, in this embodiment, the reversible check valve includes a valve body 41 and a valve shaft 42.

[0056] The valve body 41 has a valve shaft mounting cavity 415 inside, and a first flow channel 411, a second flow channel 412, and a third flow channel 413 are provided on the outer peripheral surface of the valve body 41. The first flow channel 411 is used to connect to the input pipeline, the second flow channel 412 is used to connect to the first output pipeline, and the third flow channel 413 is used to connect to the second output pipeline. The first flow channel 411, the second flow channel 412, and the third flow channel 413 all penetrate the side wall of the valve body 41 and extend to the valve shaft mounting cavity 415. A first valve ball 4123 is provided in the second flow channel 412, which allows the fluid in the second flow channel 412 to flow in only one direction. A second valve ball 4133 is provided in the third flow channel 413, which also allows the fluid in the third flow channel 413 to flow in only one direction.

[0057] The valve shaft 42 is movably disposed in the valve shaft mounting cavity 415 along its own axis. The outer peripheral surface of the valve shaft 42 is provided with a valve shaft flow channel 421. The first flow channel 411 is connected to the valve shaft flow channel 421. The valve shaft 42 can move along its own axis to switch between the first state and the second state.

[0058] In the first state, the valve shaft flow channel 421 is simultaneously connected to the first flow channel 411 and the third flow channel 413, and the fluid via the reversible check valve 4 can only flow out from the third flow channel 413.

[0059] In the second state, the valve shaft flow channel 421 is simultaneously connected to the first flow channel 411 and the second flow channel 412, and the fluid via the reversible check valve 4 can only flow out from the second flow channel 412.

[0060] In practical applications, the reversible check valve provided in this embodiment is installed at the connection of three pipelines: the first flow channel 411 is connected to the input pipeline, the first output pipeline is connected to the second flow channel 412, and the second output pipeline is connected to the third flow channel 413. By controlling the valve shaft 42 to switch between the first and second states, the fluid entering the reversible check valve can be controlled to flow out of either the second flow channel 412 or the third flow channel 413. When the fluid flows out of the second flow channel 412, it can only flow unidirectionally within the second flow channel 412. When the fluid flows out of the third flow channel 413, it can only flow unidirectionally within the third flow channel 413.

[0061] See Figure 6 , Figure 10 , Figure 14 and Figure 18 In this embodiment, in order to limit the movement distance of the valve shaft 42, the reversible check valve 4 also includes a movement limiting member 43, which is configured to be fixedly installed on the mounting part of the reversible check valve at one end.

[0062] The valve shaft 42 is provided with a movable limiting groove 422, and the valve body 41 is provided with a movable limiting member through hole 414. The other end of the movable limiting member 43 passes through the movable limiting member through hole 414 and extends into the movable limiting groove 422.

[0063] In the first state, the movable limiting member 43 abuts against one side wall of the movable limiting groove 422 in a direction perpendicular to the axis of the valve shaft 42; in the second state, the movable limiting member 43 abuts against the other side wall of the movable limiting groove 422 in a direction perpendicular to the axis of the valve shaft 42. Thus, the movable limiting groove 422 limits the movement distance on the valve shaft 42.

[0064] Specifically, see Figure 1 and Figure 2 The inlet of the first flow channel 411 is located on the outer side wall of the valve body 41, and the outlet of the first flow channel 411 is located on the inner side wall of the valve body 41. The outlet of the first flow channel 411 is always connected to the third flow channel 413.

[0065] Specifically, the two ends of the second flow channel 412 are respectively provided with a second flow channel outlet 4121 and a second flow channel inlet 4122 that penetrate into the inner sidewall of the valve body 41. A first valve ball 4123 is provided at the second flow channel inlet 4122, and the first valve ball 4123 makes the fluid passing through the second flow channel 412 flow only in the direction from the second flow channel inlet 4122 to the second flow channel outlet 4121.

[0066] Specifically, the cross-sectional area of ​​the second flow channel inlet 4122 gradually increases along the fluid flow direction. This design ensures normal fluid flow by maintaining a gap between the first valve ball 4123 and the second flow channel inlet 4122 when the fluid flows in the forward direction. If the fluid tends to flow backward, the reverse-flowing fluid exerts pressure on the first valve ball 4123, causing it to block the second flow channel inlet 4122. Thus, the fluid in the second flow channel 412 can only flow from the second flow channel inlet 4122 to the second flow channel outlet 4121.

[0067] Specifically, in the first state, the outlet of the first flow channel 411 is connected to the third flow channel 413 and simultaneously connected to the valve shaft flow channel 421, the outlet of the second flow channel 4121 is connected to the valve shaft flow channel 421, and the valve shaft flow channel 421 is connected to the third flow channel 413.

[0068] In the second state, the outlet of the first flow channel 411 is connected to the third flow channel 413 and simultaneously cut off from the valve shaft flow channel 421. The outlet 4121 of the second flow channel is blocked by the outer peripheral surface of the valve shaft 42, and the inlet 4122 of the second flow channel is connected to the valve shaft flow channel 421.

[0069] The third flow channel 413 is provided with a third flow channel inlet 4132 and a third flow channel outlet 4131 that penetrate into the inner wall of the valve body 41 at both ends. A second valve ball 4133 is provided at the third flow channel inlet 4132, which allows the fluid passing through the third flow channel 413 to flow only in the direction from the third flow channel inlet 4132 to the third flow channel outlet 4131.

[0070] Specifically, the cross-sectional area of ​​the third flow channel inlet 4132 gradually increases along the fluid flow direction. This design ensures normal fluid flow by maintaining a gap between the second valve ball 4133 and the third flow channel inlet 4132 when the fluid flows in the forward direction. If the fluid tends to flow backward, the reverse-flowing fluid exerts pressure on the second valve ball 4133, causing it to block the third flow channel inlet 4132. This configuration ensures that the fluid in the third flow channel 413 can only flow from the third flow channel inlet 4132 to the third flow channel outlet 4131.

[0071] Specifically, in the first state, the outlet of the first flow channel 411 is connected to the inlet of the third flow channel 4132 and simultaneously connected to the valve shaft flow channel 421, while the outlet of the third flow channel 4131 is blocked by the outer peripheral surface of the valve shaft 42.

[0072] In the second state, the outlet of the first flow channel 411 is connected to the inlet of the third flow channel 4132 and simultaneously disconnected from the valve shaft flow channel 421, while the outlet of the third flow channel 4131 is connected to the valve shaft flow channel 421.

[0073] Specifically, see Figures 1-5 In the first state, the fluid entering the first flow channel 411 is divided into two paths; one path directly enters the third flow channel 413 from the third flow channel inlet 4132. At this time, the third flow channel outlet 4131 is blocked by the outer peripheral surface of the valve shaft 42, and the third flow channel 413 can stably supply fluid to the second output pipeline; the other path enters the valve shaft flow channel 421 through the first flow channel 411, and then returns to the valve shaft flow channel 421 through the second flow channel inlet 4122, the second flow channel 412, and the second flow channel outlet 4121 in sequence, repeating the cycle.

[0074] Meanwhile, in the first state, the fluid flowing back from the first output pipe to the second flow channel 412 can only flow through the outlet 4121 of the second flow channel to the valve shaft flow channel 421 due to the restriction of the first valve ball 4123, and participate in the fluid supply of the valve shaft flow channel 421 to the third flow channel 413, thereby participating in the fluid supply to the second output pipe.

[0075] In the first state, due to the setting of the second valve ball 4133 in the third flow channel 413, the fluid in the third flow channel 413 can only flow in the direction from the inlet 4132 of the third flow channel to the outlet 4131 of the third flow channel. The outlet 4131 of the third flow channel is blocked by the outer peripheral surface of the valve shaft 42, thereby ensuring that the fluid in the second output pipeline can only flow in one direction.

[0076] Specifically, see Figures 7-10 In the second state, the fluid entering the first flow channel 411 directly enters the third flow channel 413 from the third flow channel inlet 4132, and then flows sequentially through the third flow channel outlet 4131, valve shaft flow channel 421, second flow channel inlet 4122, and second flow channel 412 to the position of the second flow channel outlet 4121, thereby stably supplying fluid to the first output pipeline.

[0077] Meanwhile, in the second state, the fluid returning from the second output pipe to the third flow channel 413 can only flow from the outlet 4131 of the third flow channel to the valve shaft flow channel 421 due to the setting of the second valve ball 4133, and participate in the fluid supply of the valve shaft flow channel 421 to the second flow channel 412, thereby participating in the fluid supply to the first output pipe.

[0078] In the second state, due to the arrangement of the first valve ball 4123 in the second flow channel 412, the fluid in the second flow channel 412 can only flow in the direction from the second flow channel inlet 4122 to the second flow channel outlet 4121. The second flow channel outlet 4121 is blocked by the outer peripheral surface of the valve shaft 42, thereby ensuring that the fluid in the first output pipeline can only flow in one direction.

[0079] In this embodiment, the valve shaft 42 can move along its own axis such that one of the second flow channel outlet 4121 and the third flow channel outlet 4131 communicates with the valve shaft flow channel 421, while the other is blocked by the outer peripheral surface of the valve shaft 42. The flow channel corresponding to the blocked flow channel outlet can stably supply fluid to its corresponding output pipeline.

[0080] Specifically, in this embodiment, the first flow channel 411 is a through structure that penetrates the valve body 41, and one end of the first flow channel 411 located in the valve shaft mounting cavity 415 is directly connected to the inlet 4132 of the third flow channel.

[0081] Specifically, in this embodiment, the second flow channel 412 is an arc-shaped flow channel extending circumferentially along the valve body 41, and the central angle corresponding to the arc-shaped flow channel is less than 180°. The outlet 4121 and the inlet 4122 of the second flow channel are located at the two ends of the arc-shaped flow channel, respectively. The first output pipeline is connected to approximately the middle position of the arc-shaped flow channel.

[0082] The third flow channel 413 is located beside the second flow channel 412 and close to the inlet 4122 of the second flow channel. The third flow channel 413 extends approximately along the axis of the valve body 41. The inlet 4132 of the third flow channel is located near one end of the third flow channel 413. The outlet 4131 of the third flow channel is located approximately in the middle of the third flow channel 413. The other end of the third flow channel 413 is connected to the first output pipeline.

[0083] Specifically, in this embodiment, the valve shaft flow channel 421 is a groove structure provided on the outer peripheral surface of the valve shaft 42, including a first section 4211, a second section 4212, and a third section 4213 connected in sequence. The third section 4213 is correspondingly provided with the third flow channel outlet 4131, and the first section 4211 is correspondingly provided with the second flow channel outlet 4121.

[0084] When valve shaft 42 is in the first state, it moves until the third flow channel outlet 4131 is misaligned with the third section 4213. At this time, the third flow channel outlet 4131 is blocked by the outer circumferential surface of valve shaft 42, and the first section 4211 is connected to the second flow channel outlet 4121. When valve shaft 42 is in the second state, it moves until the third flow channel outlet 4131 is connected to the third section 4213, and the first section 4211 is misaligned with the second flow channel outlet 4121. At this time, the second flow channel outlet 4121 is blocked by the outer circumferential surface of valve shaft 42.

[0085] Specifically, the inner wall of the valve body 41 is recessed with two groove structures, namely a first groove structure 416 and a second groove structure. The first groove structure 416 is connected to the second flow channel inlet 4122 and the valve shaft flow channel 421, and the second groove structure is connected to the first flow channel 411 and the third flow channel inlet 4132.

[0086] In the first state and the second state, the first groove structure 416 connects the second flow channel inlet 4122 and the valve shaft flow channel 421, and the second groove structure connects the first flow channel 411 and the third flow channel inlet 4132.

[0087] For example, in this embodiment, the fluid via the reversible check valve is engine oil. Of the three pipelines, the input pipeline is connected to the first flow channel 411, the first output pipeline is connected to the second flow channel 412, and the second output pipeline is connected to the third flow channel 413.

[0088] See Figures 1-5 When valve shaft 42 is in the first state, the oil flow path in the reversible check valve 4 is as follows:

[0089] Part of the engine oil entering the reversible check valve 4 via the input line flows into the space between the valve body 41 and the valve shaft 42 through the first flow channel 411 and flows into the valve shaft flow channel 421. The engine oil in the first output line also flows back to the second flow channel 412. The engine oil in the second flow channel 412 flows into the space between the valve body 41 and the valve shaft 42 through the second flow channel outlet 4121 and flows into the valve shaft flow channel 421. The engine oil flowing into the valve shaft flow channel 421 flows into the third flow channel 413 through the third flow channel inlet 4132. The engine oil flowing into the third flow channel 413 flows out through the second output line.

[0090] Specifically, see Figures 1-5 In the first state, the oil flow path in the second flow channel 412 within the reversible check valve 4 is: P10→P11→P12→P13→P14→P15→P16→P17. The oil eventually flows from P17 to the second oil passage 14.

[0091] For example, see Figures 7-10 When valve shaft 42 is in the second state, the oil flow path in the reversible check valve 4 is as follows:

[0092] Part of the engine oil entering the reversible check valve 4 via the input pipe enters the space between the valve body 41 and the valve shaft 42 (which is a second groove structure) through the first flow channel 411, and then flows to the third flow channel 413 through the third flow channel inlet 4132. The engine oil in the second output pipe also flows back to the third flow channel 413. The engine oil in the third flow channel 413 flows to the space between the valve body 41 and the valve shaft 42 through the third flow channel outlet 4131 and flows into the valve shaft flow channel 421. The engine oil flowing into the valve shaft flow channel 421 flows from the second flow channel inlet 4122 through the first groove structure 416 into the second flow channel 412. The engine oil flowing into the second flow channel 412 is output through the first output pipe.

[0093] Specifically, participate in Figures 7-10When valve shaft 42 is in the second state, the oil flow path in the reversible check valve 4 is: P21→P22→P23→P24→P25→P26→P27. The oil eventually flows from P27 to the first oil passage 13.

[0094] Example 2

[0095] See Figures 11-21 This embodiment provides a connecting rod. Specifically, the connecting rod is an engine connecting rod.

[0096] Specifically, in this embodiment, the connecting rod includes a connecting rod body 1 and an eccentric bushing rotation limiting mechanism.

[0097] One end of the connecting rod body 1 is provided with a first connecting hole 16, which is used to connect with the piston of the engine. The other end of the connecting rod body 1 is provided with a second connecting hole 12. An eccentric bushing 2 is rotatably disposed in the second connecting hole 12. The eccentric bushing 2 is configured to connect with the crankshaft of the engine. The eccentric bushing 2 can rotate around the central axis of the second connecting hole 12 so that the position of the center point of the eccentric bushing 2 changes. An oil chamber 11 is provided in the connecting rod body 1. The distance between the center point of the eccentric bushing 2 and the center point of the first connecting hole 16 is the center distance of the connecting rod.

[0098] The center distance of the connecting rod can change with the rotation of the eccentric bushing 2.

[0099] Because the center distance of the connecting rod can change with the rotation of the eccentric bushing 2, that is, the center distance of the connecting rod is variable, the compression ratio of the engine can be variable. The engine can achieve better efficiency under various changing operating conditions. In actual operation, it is necessary to select the most suitable compression ratio according to different engine operating conditions, so as to obtain good thermal efficiency and achieve both economy and power.

[0100] Specifically, in this embodiment, when the inertial force of the engine acts on the connecting rod, the eccentric bushing 2 can rotate in the first clockwise direction and can rotate to the position where the center distance of the connecting rod is maximized.

[0101] When the engine's burst pressure acts on the connecting rod, the eccentric bushing 2 can rotate in the second clockwise direction and can rotate to the position that minimizes the center distance of the connecting rod.

[0102] The first hour hand direction is opposite to the second hour hand direction.

[0103] Specifically, see Figure 11 , Figure 11 Point O2 represents the center point of the eccentric bushing 2, and point O3 represents the center point of the second connecting hole 12.

[0104] During the actual operation of the engine, the gas inside the cylinder generates explosive pressure, and the moving parts within the engine generate inertial force. The point of application of the engine's explosive pressure and inertial force on the connecting rod is the center point O3 of the second connecting hole 12. The crankshaft is coaxially fixed inside the eccentric bushing 2. Under the action of explosive pressure and inertial force, the point of application of the crankshaft force on the connecting rod is the center point O2 of the eccentric bushing 2. The center point O2 of the eccentric bushing 2 changes as the eccentric bushing 2 rotates, causing the point of application of the engine's crankshaft on the connecting rod to also change.

[0105] Figure 11 In the process, under the action of burst pressure, the connecting rod exerts a force F1 on the eccentric bushing 2, with the point of application being O3; the corresponding crankshaft exerts a force F11 on the eccentric bushing 2, with the point of application being O2. Under the combined action of F1 and F11, the eccentric bushing 2 will rotate in the second clockwise direction.

[0106] Under the action of inertial force, the connecting rod exerts a force F2 on the eccentric bushing 2 at point O3; the corresponding crankshaft exerts a force F21 on the eccentric bushing 2 at point O2. Under the combined action of F2 and F21, the eccentric bushing 2 will rotate in the first clockwise direction.

[0107] The eccentric bushing rotation limiting mechanism includes a limiting member 31, which is connected to the eccentric bushing 2. The limiting member 31 is movably disposed in the oil cavity 11 and can extend and retract relative to the oil cavity 11 to limit the rotation angle of the eccentric bushing 2, thereby limiting the range of change of the center distance of the connecting rod.

[0108] The connecting rod body 1 is provided with a first oil passage 13 and a second oil passage 14 that communicate with the oil chamber 11. A reversible one-way valve 4 of Embodiment 1 is connected between the first oil passage 13 and the second oil passage 14. One end of the first oil passage 13 is connected to the second flow channel 412 and the other end is connected to the oil chamber 11. One end of the second oil passage 14 is connected to the third flow channel 413 and the other end is connected to the oil chamber 11. The fluid entering the oil chamber 11 from the second oil passage 14 can exert a force on the limiting member 31 in a first direction, and the fluid entering the oil chamber 11 from the first oil passage 13 can exert a force on the limiting member 31 in a second direction. The first direction and the second direction are opposite.

[0109] The reversible check valve 4 is configured such that: engine oil enters the reversible check valve 4 through the first flow channel 411; in the first state, it controls the engine oil to supply oil to the second oil passage 14, and makes the eccentric bushing 2 only able to rotate in the first clockwise direction; in the second state, it controls the engine oil to supply oil to the first oil passage 13, and makes the eccentric bushing 2 only able to rotate in the second clockwise direction, the first clockwise direction being opposite to the second clockwise direction.

[0110] The connecting rod provided in this embodiment has a reversible one-way valve 4 installed in the connecting rod body 1, which allows the engine oil to selectively enter the third flow channel 413 or the second flow channel 412, thereby controlling the engine oil to selectively enter the second oil passage 14 or the first oil passage 13. When the engine oil enters the oil chamber 11 through the first oil passage 13, it can restrict the rotation of the eccentric bushing 2 under the action of inertial force, ensuring that the eccentric bushing 2 rotates only under the action of burst pressure until the center distance of the connecting rod is minimized. When the engine oil enters the oil chamber 11 through the second oil passage 14, it can restrict the rotation of the eccentric bushing 2 under the action of burst pressure, ensuring that the eccentric bushing 2 rotates only under the action of inertial force until the center distance of the connecting rod is maximized.

[0111] Specifically, in this embodiment, the connecting rod body 1 includes a main connecting rod 17 and a semi-ring structure 18.

[0112] One end of the main connecting rod 17 is provided with a first connecting hole 16, and the oil cavity 11 is provided on the main connecting rod 17.

[0113] The semi-ring structure 18 is mated and connected to the other end of the main connecting rod 17 to form a second connecting hole 12. The semi-ring structure 18 is provided with a reversible check valve mounting hole 15 for installing the reversible check valve 4.

[0114] The distance between the center point of the eccentric bushing 2 and the center point of the first connecting hole 16 is the center distance of the connecting rod.

[0115] Furthermore, one end of the second oil passage 14 is connected to the third flow passage 413, and the other end passes through the semi-ring structure 18 and the main connecting rod 17 and is connected to the end of the oil cavity 11 near the semi-ring structure 18. One end of the first oil passage 13 is connected to the second flow passage 412, and the other end passes through the semi-ring structure 18 and the main connecting rod 17 and is connected to the other end of the oil cavity 11.

[0116] Specifically, in this embodiment, the diameter of the second connecting hole 12 is larger than the diameter of the first connecting hole 16.

[0117] In this embodiment, the change in the center distance of the connecting rod is a passive change. The engine's burst pressure and inertial force act on the center point O3 of the outer ring of the eccentric bushing 2 (the center point of the outer ring of the eccentric bushing 2 coincides with the center point of the second connecting hole 12), while the crankshaft's supporting force on the eccentric bushing 2 acts on the center point O2 of the inner hole of the eccentric bushing 2. Since points O3 and O2 are not in the same position, the eccentric bushing will rotate under the action of burst pressure and inertial force. Under the action of inertial force, the eccentric bushing 2 will rotate clockwise to the first position where the center point of the eccentric bushing 2 is at its first position, at which point the center distance of the connecting rod is at its maximum; under the action of burst pressure, the eccentric bushing 2 will rotate clockwise to the second position where the center point of the eccentric bushing 2 is at its second position, at which point the center distance of the connecting rod is at its minimum.

[0118] Specifically, in this embodiment, the first clockwise direction is Figure 12 The counter-clockwise direction is shown. The second clockwise direction is... Figure 11 The clockwise direction is shown.

[0119] Preferably, in this embodiment, the maximum eccentricity of the eccentric bushing 2 is 2mm, and the maximum difference in wall thickness of the eccentric bushing 2 is 4mm.

[0120] When this connecting rod is applied to an engine, the engine's piston and crankshaft are connected via the connecting rod, thus allowing the engine's compression ratio to be variable. A high compression ratio is used when the engine is under light load to save fuel; a low compression ratio is used when the engine is under heavy load to balance fuel economy and power.

[0121] Specifically, such as Figure 11 As shown, the center distance of the connecting rod is at its maximum at this time, which is L1; point O1 represents the center point of the first connecting hole 16; point O2 represents the center point of the eccentric bushing 2 when the center distance of the connecting rod is at its maximum.

[0122] like Figure 12 As shown, the center distance of the connecting rod is at its minimum, L2. Point O1 represents the center point of the first connecting hole 16; point O2' represents the center point of the eccentric bushing 2 when the center distance of the connecting rod is at its maximum.

[0123] Furthermore, in order to limit the rotation angle of the eccentric bushing 2 relative to the second connecting hole 12, see [reference needed]. Figure 13 The eccentric bushing rotation limiting mechanism includes a limiting component 31 and a limiting connector 32.

[0124] The limiting member 31 is movably disposed on the connecting rod body 1, and the limiting member 31 can move relative to the connecting rod body 1 within a set range.

[0125] One end of the limiting connector 32 is hinged to the limiting member 31, and the other end is hinged to the eccentric bushing 2. When the eccentric bushing 2 rotates relative to the second connecting hole 12, it can drive the limiting member 31 to move through the limiting connector 32. Since the movement range of the limiting member 31 relative to the connecting rod body 1 is limited, the rotation range of the eccentric bushing 2 relative to the second connecting hole 12 is also limited.

[0126] Optionally, in this embodiment, the rotation angle of the eccentric bushing 2 relative to the second connecting hole 12 is 90°-150°; such as 90°, 96°, 135° or 150°. Of course, in other embodiments, the rotation angle of the eccentric bushing 2 relative to the second connecting hole 12 can be set as needed, and no further restrictions are imposed here.

[0127] One end of the limiting connector 32 is hinged to the limiting member 31, and the other end is hinged to the eccentric bushing 2. When the eccentric bushing 2 rotates relative to the second connecting hole 12, the limiting connector 32 drives the limiting member 31 to reciprocate relative to the connecting rod body 1. Since the movement range of the limiting member 31 relative to the connecting rod body 1 is limited, the center point of the eccentric bushing 2 can be restricted to the first position or the second position.

[0128] In the first position, the center distance of the connecting rods is the largest; in the second position, the center distance of the connecting rods is the smallest.

[0129] Specifically, such as Figure 11 As shown, the center point of the eccentric bushing 2 is in the first position, and the center distance of the connecting rod is at its maximum. At this time, the limiting member 31 moves to the first limit position relative to the connecting rod body 1; as Figure 12 As shown, in the second position, the center distance of the connecting rod is the smallest, and at this time the limiting member 31 moves to the second limit position relative to the connecting rod body 1.

[0130] Further, see Figure 14 and Figure 15 In this embodiment, the connecting rod body 1 is provided with an oil cavity 11 with an opening at one end. The limiting member 31 is telescopically provided at the opening end of the oil cavity 11. The opening end of the oil cavity 11 is provided with a first oil hole 111, and the end of the oil cavity 11 away from the first oil hole 111 is provided with a second oil hole 112.

[0131] Further preferably, in this embodiment, see Figure 12 and Figure 16 In order to limit the extension and retraction stroke of the limiting member 31 relative to the oil cavity 11, in this embodiment, a limiting cavity 19 is also provided on the connecting rod body 1.

[0132] Specifically, the connecting rod body 1 is provided with a limiting cavity 19 that communicates with the oil cavity 11. When the limiting member 31 extends to the limit extension position relative to the oil cavity 11, the limiting member 31 abuts against the inner wall surface of the limiting cavity 19 that is away from the oil cavity 11, thereby limiting the limit extension position of the limiting member 31.

[0133] See Figure 15 When the limiting member 31 extends to the limit position relative to the oil chamber 11, the engine oil can enter the oil chamber 11 through the second oil hole 112 so that the limiting member 31 is stable in the limit position.

[0134] The extreme extension position is the first extreme position of the limiting member 31. When the limiting member 31 is stable in the extreme extension position, the center point of the eccentric bushing 2 can be stable in the first position, thereby making the center distance of the connecting rod stable at the maximum.

[0135] See Figure 16When the limiting member 31 retracts to the limit retracted position relative to the oil chamber 11, the engine oil can enter the oil chamber 11 through the first oil hole 111 so that the limiting member 31 is stabilized in the limit retracted position.

[0136] The ultimate retracted position is the second extreme position of the limiting member 31. When the limiting member 31 is stable in the ultimate retracted position, the center point of the eccentric bushing 2 can be stabilized in the second position, thereby making the center distance of the connecting rod stable at the minimum.

[0137] Furthermore, the limiting member 31 is provided with a flange 311 at one end near the second oil hole 112. The oil entering from the first oil hole 111 can exert a force on the flange 311 toward the second oil hole 112, and the oil entering from the second oil hole 112 can exert a force on the flange 311 toward the first oil hole 111.

[0138] The flange 311 further ensures that the limiting member 31 can be stably positioned at the limit extension or limit retraction position, thereby ensuring that the center distance of the connecting rod is stably maintained at the maximum or minimum.

[0139] Further, see Figure 15 and Figure 16 A protrusion 113 is provided on the bottom surface of the end of the oil cavity 11 away from the first oil hole 111. When the limiting member 31 retracts to the limit retraction position relative to the oil cavity 11, there is a gap between the limiting member 31 and the protrusion 113, and the second oil hole 112 communicates with the gap.

[0140] The presence of this gap allows the oil entering from the second oil hole 112 to exert a force on the flange 311 toward the first oil hole 111.

[0141] Specifically, an oil cavity sealing plug 115 is provided at the end of the oil cavity 11 away from the first oil hole 111, and a protrusion 113 is provided on the oil cavity sealing plug 115.

[0142] Further, see Figures 14-16 The connecting rod body 1 is provided with a first oil passage 13 and a second oil passage 14. The outlet of the first oil passage 13 is connected to the first oil hole 111, and the outlet of the second oil passage 14 is connected to the second oil hole 112. The engine oil can selectively enter the first oil passage 13 or the second oil passage 14.

[0143] See Figure 15 When the limiting member 31 extends to its maximum extension position relative to the oil chamber 11, the engine oil enters the oil chamber 11 sequentially through the second oil passage 14 and the second oil hole 112, thus stabilizing the limiting member 31 at its maximum extension position. That is... Figure 15In the indicated orientation, the oil in the oil chamber 11 exerts an upward force on the limiting member 31 along the axial direction of the limiting member 31, ensuring that the limiting member 31 is stably maintained in the extreme extension position.

[0144] See Figure 16 When the limiting member 31 retracts to its maximum retracted position relative to the oil chamber 11, the engine oil enters the oil chamber 11 sequentially through the first oil passage 13 and the first oil hole 111, thus stabilizing the limiting member 31 in its maximum retracted position. That is, in Figure 16 In the indicated orientation, the oil in the oil chamber 11 exerts a downward force on the limiting member 31 along the axial direction of the limiting member 31, ensuring that the limiting member 31 is stably maintained in the extreme retracted position.

[0145] Specifically, a gap exists between the outer wall of the limiting member 31 and the inner wall of the oil cavity 11, so that the oil cavity 11 can contain engine oil when the limiting member 31 is in its extreme retracted position. The flange 311 is clearance-fitted with the oil cavity 11 to guide the movement of the limiting member 31, ensuring that the limiting member 31 can only reciprocate along its own axis. More specifically, in this embodiment, the limiting member 31 is a cylindrical structure.

[0146] Specifically, both the first oil passage 13 and the second oil passage 14 are hollow structures located inside the connecting rod body 1.

[0147] Specifically, when it is necessary to control the center distance of the connecting rod to be the minimum, after the engine oil enters the first oil passage 13, the engine oil enters the oil chamber 11 through the first oil hole 111 via the first oil passage 13. The engine oil exerts a force on the flange 311 toward the second oil hole 112, so that the limiting member 31 is stabilized in the extreme retracted position relative to the oil chamber 11, thereby ensuring that the center point of the eccentric bushing 2 is stably maintained in the second position.

[0148] When the center distance of the connecting rod needs to be maximized, the engine oil enters the second oil passage 14 and then enters the oil chamber 11 through the second oil hole 112. The engine oil exerts a force on the flange 311 toward the first oil hole 111, so that the limiting member 31 is stabilized in the extreme extension position relative to the oil chamber 11, thereby keeping the center point of the eccentric bushing 2 stably maintained in the first position.

[0149] Preferably, in this embodiment, two limiting connectors 32 are provided. A rotating pin 312 is rotatably mounted on one end of the limiting connector 31 located outside the oil cavity 11. The two ends of the rotating pin 312 are located on opposite sides of the connecting rod body 1, and the two limiting connectors 32 are also located on opposite sides of the connecting rod body 1. One end of the limiting connector 32 on the same side is fixedly connected to the end of the rotating pin 312 on that side, and the other end of the limiting connector 32 is rotatably connected to the eccentric sleeve 2. When the eccentric sleeve 2 rotates, it drives the limiting connector 31 to move stably through the two limiting connectors 32.

[0150] Specifically, in this embodiment, the connecting rod body 1 includes a main connecting rod 17 and a semi-ring structure 18 that are connected to each other. A first connecting hole 16 is provided at the end of the main connecting rod 17 away from the semi-ring structure 18; a second connecting hole 12 is formed at the connection between the main connecting rod 17 and the semi-ring structure 18.

[0151] Further, see Figure 11 , Figure 17 and Figure 18 In this embodiment, a reversible one-way valve mounting hole 15 is provided in the connecting rod body 1, and a reversible one-way valve 4 is installed in the reversible one-way valve mounting hole 15. The engine oil can selectively enter the first oil passage 13 or the second oil passage 14 through the reversible one-way valve 4, and the reversible one-way valve 4 makes the engine oil in the first oil passage 13 and the second oil passage 14 flow only in one direction.

[0152] Specifically, see Figure 19 and Figure 20 The first oil passage 13 includes a first hollow cavity 131 and a second hollow cavity 132. The first hollow cavity 131 is disposed within the semi-annular structure 18, and one end of it is connected to the mounting hole 15 of the reversible one-way valve; the second hollow cavity 132 is disposed within the main connecting rod 17, and one end of it is connected to the other end of the first hollow cavity 131, the opening of the other end being the first oil hole 111.

[0153] The second oil passage 14 includes a third hollow cavity 141 and a fourth hollow cavity 142. The third hollow cavity 141 is located inside the semi-annular structure 18, and one end of it is connected to the mounting hole 15 of the reversible one-way valve. The fourth hollow cavity 142 is located inside the main connecting rod 17, and one end of it is connected to the other end of the third hollow cavity 141. The opening at the other end is the second oil hole 112.

[0154] Specifically, see Figure 14 and Figure 21 In this embodiment, the inner ring surface of the eccentric bushing 2 is provided with an inner ring oil groove 21, the outer ring surface of the eccentric bushing 2 is provided with an outer ring oil groove 22, and the eccentric bushing 2 is provided with a connecting oil groove 23 that connects the inner ring oil groove 21 and the outer ring oil groove 22. The engine oil can enter the reversible check valve 4 in sequence through the inner ring oil groove 21, the connecting oil groove 23 and the outer ring oil groove 22.

[0155] The inner oil groove 21 and the outer oil groove 22 can store engine oil, ensuring that the engine oil can continuously enter the reversible check valve 4.

[0156] Preferably, a plurality of communicating oil grooves 23 are provided at intervals along the circumference of the eccentric bushing 2. For example, in this embodiment, four communicating oil grooves 23 are provided at intervals along the circumference of the eccentric bushing 2.

[0157] Under the influence of inertial force, the engine oil can enter the second oil passage 14, while the first oil passage 13 is in a closed state. Under the influence of explosive pressure, the engine oil can enter the first oil passage 13, while the second oil passage 14 is in a closed state.

[0158] Understandably, in actual operation, the connecting rod is subjected to both inertial force and explosive pressure. To ensure that the eccentric sleeve 2 rotates only under the action of one force and is not affected by the other force, in this embodiment, a reversible check valve 4 is provided to control the eccentric sleeve 2 to rotate only under the action of inertial force or explosive pressure.

[0159] For example, the initial state of the link is Figure 12 At this point, the center distance of the connecting rods is at its minimum. When it is necessary to control the center distance of the connecting rods from small to large to its maximum, the eccentric bushing 2, under the action of inertial force, moves along... Figure 12 As shown, the eccentric bushing 2 rotates counterclockwise, and the limiting member 31 gradually extends out relative to the oil cavity 11.

[0160] At this time, the engine oil can only enter the second oil passage 14 through the reversible check valve 4. The engine oil then enters the oil chamber 11 through the second oil passage 14 and the second oil hole 112, ultimately stabilizing the limit member 31 at its maximum extended position. The connecting rod is now in the following state: Figure 11 As shown.

[0161] During the process of controlling the center distance of the connecting rod from small to large to its maximum, the eccentric bushing 2 is also subjected to burst pressure. However, due to the reversible check valve 4, the engine oil can only enter the second oil passage 14 and cannot enter the first oil passage 13. That is, the first oil passage 13 is in a closed state at this time. The engine oil in the first oil passage 13 can flow out, but external engine oil cannot flow into the first oil passage 13. The engine oil in the oil chamber 11 exerts a force on the limiting member 31 to extend out of the oil chamber 11, thereby preventing the limiting member 31 from retracting relative to the oil chamber 11. Ultimately, this restricts the reverse rotation of the eccentric bushing 2 under burst pressure, meaning that the rotation of the eccentric bushing 2 is not affected by the burst pressure.

[0162] Meanwhile, during the process of controlling the center distance of the connecting rod from small to large to the maximum state, the oil in the second oil passage 14 can only flow in one direction, thereby preventing the oil in the oil chamber 11 from flowing back, and finally achieving the stable maintenance of the center distance of the connecting rod at the maximum state.

[0163] For example, the initial state of the link is Figure 11 At this point, the center distance of the connecting rod is at its maximum. When it is necessary to control the center distance of the connecting rod from its maximum to its minimum, the eccentric bushing 2, under the action of burst pressure, moves along... Figure 11 The eccentric bushing 2 rotates clockwise as shown. As the eccentric bushing 2 rotates clockwise, the limiting member 31 gradually retracts relative to the oil cavity 11.

[0164] At this time, the engine oil can only enter the first oil passage 13 through the reversible check valve 4. The engine oil then enters the oil chamber 11 sequentially through the first oil passage 13 and the first oil hole 111, ultimately stabilizing the limit member 31 in its ultimate retracted position. At this time, the connecting rod is in the following state: Figure 12 As shown, the state of the limiting member 31 is as follows: Figure 16 As shown.

[0165] During the process of controlling the center distance of the connecting rod from large to small to its minimum state, the eccentric bushing 2 is also subjected to inertial force. However, due to the reversible check valve 4, the engine oil can only enter the first oil passage 13 and cannot enter the second oil passage 14. That is, the second oil passage 14 is in a closed state at this time. At this time, the engine oil in the second oil passage 14 can flow out, but the engine oil from the outside cannot flow into the second oil passage 14. The engine oil in the oil chamber 11 exerts a force on the limiting member 31 to retract the oil chamber 11, thereby preventing the limiting member 31 from extending relative to the oil chamber 11. Ultimately, this restricts the reverse rotation of the eccentric bushing 2 under the action of inertial force, that is, the rotation of the eccentric bushing 2 is not affected by inertial force.

[0166] Meanwhile, during the process of controlling the center distance of the connecting rod from large to small to the minimum state, the oil in the first oil passage 13 can only flow in one direction, thereby preventing the oil in the first oil passage 13 from flowing back, ensuring that the limit member 31 is stable in the extreme retracted position, and ultimately ensuring that the eccentric bushing 2 is stable in the minimum state of the center distance of the connecting rod.

[0167] Further, see Figure 14 In the actual manufacturing process, in order to achieve the connection between the second oil passage 14 and the oil cavity 11, a connecting hole 143 is drilled in the connecting rod body 1. One end of the connecting hole 143 is connected to the oil cavity 11, and the other end passes through to the connecting rod body 1 and is sealed by a steel ball. The connecting hole 143 is part of the second oil passage 14.

[0168] That is to say Figure 4Taking the perspective shown as an example, the left end of the connecting hole 143 is blocked by a steel ball, and the right end is connected to the oil cavity 11.

[0169] Specifically, the semi-ring structure 18 is provided with a connecting groove 181 that connects the reversible check valve mounting hole 15 and the outer ring oil groove 22.

[0170] In this embodiment, the reversible check valve 4 can control the engine oil to selectively enter the first oil passage 13 or the second oil passage 14, and the oil in the first oil passage 13 and the second oil passage 14 can only flow in one direction.

[0171] Specifically, see Figure 1 and Figure 2 In this embodiment, the reversible check valve 4 includes a valve body 41 and a valve shaft 42.

[0172] The valve body 41 has a valve shaft mounting cavity 415 inside, and a first flow channel 411, a second flow channel 412, and a third flow channel 413 are provided on the outer peripheral surface of the valve body 41. The first flow channel 411 is used to connect to the input pipeline, the second flow channel 412 is used to connect to the first oil passage 13, and the third flow channel 413 is used to connect to the second oil passage 14. The first flow channel 411, the second flow channel 412, and the third flow channel 413 all penetrate the side wall of the valve body 41 and extend to the valve shaft mounting cavity 415. A first valve ball 4123 is provided in the second flow channel 412, which allows the fluid in the second flow channel 412 to flow in only one direction. A second valve ball 4133 is provided in the third flow channel 413, which also allows the fluid in the third flow channel 413 to flow in only one direction.

[0173] In this embodiment, the first flow channel 411 is used to communicate with the connecting groove 181. The second flow channel 412 is connected to the first oil passage 13, and the third flow channel 413 is connected to the second oil passage 14.

[0174] The valve shaft 42 is movably disposed in the valve shaft mounting cavity 415 along its own axis. The outer peripheral surface of the valve shaft 42 is provided with a valve shaft flow channel 421. The first flow channel 411 is connected to the valve shaft flow channel 421. The valve shaft 42 can move along its own axis to switch between the first state and the second state.

[0175] In the first state, the valve shaft flow channel 421 is simultaneously connected to the first flow channel 411 and the third flow channel 413, and the fluid via the reversible check valve 4 can only flow out from the third flow channel 413.

[0176] In the second state, the valve shaft flow channel 421 is simultaneously connected to the first flow channel 411 and the second flow channel 412, and the fluid via the reversible check valve 4 can only flow out from the second flow channel 412.

[0177] Specifically, in this embodiment, the first output pipeline is the first oil passage 13. The second output pipeline is the second oil passage 14. The input pipeline is the connecting groove 181.

[0178] The first flow channel 411 is connected to the input pipeline, the first oil passage 13 is connected to the second flow channel 412, and the second oil passage 14 is connected to the third flow channel 413. By switching the control valve shaft 42 between the first and second states, the fluid entering the reversible check valve 4 can be controlled to flow out of the second flow channel 412 or the third flow channel 413. When the fluid flows out of the second flow channel 412, it can only flow unidirectionally within the second flow channel 412. When the fluid flows out of the third flow channel 413, it can only flow unidirectionally within the third flow channel 413.

[0179] See Figures 11-14 In this embodiment, the reversible check valve 4 is installed in the reversible check valve mounting hole 15 of the semi-ring structure 18. The second oil passage 14 is connected to the third flow passage 413. The first oil passage 13 is connected to the second flow passage 412.

[0180] The engine oil can sequentially enter the reversible check valve mounting hole 15 through the inner ring oil groove 21, the connecting oil groove 23, the outer ring oil groove 22 and the connecting groove 181, and then enter the first flow channel 411.

[0181] When the connecting rod needs to be switched to the maximum center distance state, the valve shaft 42 is switched to the first state, the second flow channel 412 is in the closed state, thus the first oil passage 13 is also in the closed state. The oil entering the reversible check valve 4 can enter the oil chamber 11 through the third flow channel 413, the second oil passage 14, and the second oil hole 112. At the same time, the eccentric bushing 2 rotates under the action of inertial force until the center point of the eccentric bushing 2 is in the first position. During the rotation of the eccentric bushing 2, the oil limiting and limiting member 31 in the oil chamber 11 is stably kept in the extreme extension position to prevent the eccentric bushing 2 from rotating under the action of burst pressure.

[0182] When the connecting rod needs to switch to the minimum center distance state, the valve shaft 42 is switched to the second state, the third flow channel 413 is in the closed state, thus the second oil passage 14 is also in the closed state. The oil entering the reversible check valve 4 can enter the oil chamber 11 through the second flow channel 412, the first oil passage 13 and the first oil hole 111. At the same time, the eccentric bushing 2 rotates under the action of burst pressure until the center point of the eccentric bushing 2 is in the second position. During the rotation of the eccentric bushing 2, the oil limiting and limiting member 31 in the oil chamber 11 is stably kept in the extreme retracted position to prevent the eccentric bushing 2 from rotating under the action of inertial force.

[0183] See Figure 6 , Figure 10 , Figure 14 and Figure 18In this embodiment, in order to limit the movement distance of the valve shaft 42, the reversible check valve 4 also includes a movement limiting member 43, which is configured to be fixedly installed on the mounting part of the reversible check valve 4 at one end.

[0184] The valve shaft 42 is provided with a movable limiting groove 422, and the valve body 41 is provided with a movable limiting member through hole 414. The other end of the movable limiting member 43 passes through the movable limiting member through hole 414 and extends into the movable limiting groove 422.

[0185] In the first state, the movable limiting member 43 abuts against one side wall of the movable limiting groove 422 in a direction perpendicular to the axis of the valve shaft 42; in the second state, the movable limiting member 43 abuts against the other side wall of the movable limiting groove 422 in a direction perpendicular to the axis of the valve shaft 42. Thus, the movable limiting groove 422 limits the movement distance on the valve shaft 42.

[0186] Specifically, see Figure 1 and Figure 2 The inlet of the first flow channel 411 is located on the outer side wall of the valve body 41, and the outlet of the first flow channel 411 is located on the inner side wall of the valve body 41. The outlet of the first flow channel 411 is always connected to the third flow channel 413.

[0187] Specifically, the two ends of the second flow channel 412 are respectively provided with a second flow channel outlet 4121 and a second flow channel inlet 4122 that penetrate into the inner sidewall of the valve body 41. A first valve ball 4123 is provided at the second flow channel inlet 4122, and the first valve ball 4123 makes the fluid passing through the second flow channel 412 flow only in the direction from the second flow channel inlet 4122 to the second flow channel outlet 4121.

[0188] Specifically, the cross-sectional area of ​​the second flow channel inlet 4122 gradually increases along the fluid flow direction. This design ensures normal fluid flow by maintaining a gap between the first valve ball 4123 and the second flow channel inlet 4122 when the fluid flows in the forward direction. If the fluid tends to flow backward, the reverse-flowing fluid exerts pressure on the first valve ball 4123, causing it to block the second flow channel inlet 4122. Thus, the fluid in the second flow channel 412 can only flow from the second flow channel inlet 4122 to the second flow channel outlet 4121.

[0189] Specifically, in the first state, the outlet of the first flow channel 411 is connected to the third flow channel 413 and simultaneously connected to the valve shaft flow channel 421, the outlet of the second flow channel 4121 is connected to the valve shaft flow channel 421, and the valve shaft flow channel 421 is connected to the third flow channel 413.

[0190] In the second state, the outlet of the first flow channel 411 is connected to the third flow channel 413 and simultaneously cut off from the valve shaft flow channel 421. The outlet 4121 of the second flow channel is blocked by the outer peripheral surface of the valve shaft 42, and the inlet 4122 of the second flow channel is connected to the valve shaft flow channel 421.

[0191] The third flow channel 413 is provided with a third flow channel inlet 4132 and a third flow channel outlet 4131 that penetrate into the inner wall of the valve body 41 at both ends. A second valve ball 4133 is provided at the third flow channel inlet 4132, which allows the fluid passing through the third flow channel 413 to flow only in the direction from the third flow channel inlet 4132 to the third flow channel outlet 4131.

[0192] Specifically, the cross-sectional area of ​​the third flow channel inlet 4132 gradually increases along the fluid flow direction. This design ensures normal fluid flow by maintaining a gap between the second valve ball 4133 and the third flow channel inlet 4132 when the fluid flows in the forward direction. If the fluid tends to flow backward, the reverse-flowing fluid exerts pressure on the second valve ball 4133, causing it to block the third flow channel inlet 4132. This configuration ensures that the fluid in the third flow channel 413 can only flow from the third flow channel inlet 4132 to the third flow channel outlet 4131.

[0193] Specifically, in the first state, the outlet of the first flow channel 411 is connected to the inlet of the third flow channel 4132 and simultaneously connected to the valve shaft flow channel 421, while the outlet of the third flow channel 4131 is blocked by the outer peripheral surface of the valve shaft 42.

[0194] In the second state, the outlet of the first flow channel 411 is connected to the inlet of the third flow channel 4132 and simultaneously cut off from the valve shaft flow channel 421, while the outlet of the third flow channel 4131 is connected to the valve shaft flow channel 421.

[0195] Specifically, see Figures 1-5 In the first state, the fluid entering the first flow channel 411 is divided into two paths; one path directly enters the third flow channel 413 from the third flow channel inlet 4132. At this time, the third flow channel outlet 4131 is blocked by the outer peripheral surface of the valve shaft 42, and the third flow channel 413 can stably supply fluid to the second oil passage 14; the other path enters the valve shaft flow channel 421 through the first flow channel 411, and then returns to the valve shaft flow channel 421 through the second flow channel inlet 4122, the second flow channel 412, and the second flow channel outlet 4121 in sequence, repeating the cycle.

[0196] Meanwhile, in the first state, the fluid flowing back from the first oil passage 13 to the second flow passage 412 can only flow through the outlet 4121 of the second flow passage to the valve shaft flow passage 421 due to the restriction of the first valve ball 4123, and participate in the fluid supply of the valve shaft flow passage 421 to the third flow passage 413, thereby participating in the fluid supply to the second oil passage 14.

[0197] In the first state, due to the setting of the second valve ball 4133 in the third flow channel 413, the fluid in the third flow channel 413 can only flow in the direction from the inlet 4132 of the third flow channel to the outlet 4131 of the third flow channel. The outlet 4131 of the third flow channel is blocked by the outer peripheral surface of the valve shaft 42, thereby ensuring that the fluid in the second oil passage 14 can only flow in one direction.

[0198] Specifically, see Figures 7-10 In the second state, the fluid entering the first flow channel 411 directly enters the third flow channel 413 from the third flow channel inlet 4132, and then flows sequentially through the third flow channel outlet 4131, valve shaft flow channel 421, second flow channel inlet 4122, and second flow channel 412 to the position of the second flow channel outlet 4121, thereby stably supplying fluid to the first oil passage 13.

[0199] Meanwhile, in the second state, the fluid returning from the second oil passage 14 to the third flow passage 413 can only flow from the outlet 4131 of the third flow passage to the valve shaft flow passage 421 due to the setting of the second valve ball 4133, and participate in the fluid supply of the valve shaft flow passage 421 to the second flow passage 412, thereby participating in the fluid supply to the first oil passage 13.

[0200] In the second state, due to the arrangement of the first valve ball 4123 in the second flow channel 412, the fluid in the second flow channel 412 can only flow in the direction from the inlet 4122 to the outlet 4121 of the second flow channel. The outlet 4121 of the second flow channel is blocked by the outer peripheral surface of the valve shaft 42, thereby ensuring that the fluid in the first oil passage 13 can only flow in one direction.

[0201] In this embodiment, the valve shaft 42 can move along its own axis such that one of the second flow channel outlet 4121 and the third flow channel outlet 4131 communicates with the valve shaft flow channel 421, while the other is blocked by the outer peripheral surface of the valve shaft 42. The flow channel corresponding to the blocked flow channel outlet can stably supply fluid to its corresponding output pipeline.

[0202] Specifically, in this embodiment, the first flow channel 411 is a through structure that penetrates the valve body 41, and one end of the first flow channel 411 located in the valve shaft mounting cavity 415 is directly connected to the inlet 4132 of the third flow channel.

[0203] Specifically, in this embodiment, the second flow channel 412 is an arc-shaped flow channel extending circumferentially along the valve body 41, and the central angle corresponding to the arc-shaped flow channel is less than 180°. The outlet 4121 and the inlet 4122 of the second flow channel are located at the two ends of the arc-shaped flow channel, respectively. The first oil passage 13 is approximately connected to the middle position of the arc-shaped flow channel.

[0204] The third flow channel 413 is located beside the second flow channel 412 and close to the inlet 4122 of the second flow channel. The third flow channel 413 extends approximately along the axis of the valve body 41. The inlet 4132 of the third flow channel is located near one end of the third flow channel 413. The outlet 4131 of the third flow channel is located approximately in the middle of the third flow channel 413. The other end of the third flow channel 413 is connected to the first oil passage 13.

[0205] Specifically, in this embodiment, the valve shaft flow channel 421 is a groove structure provided on the outer peripheral surface of the valve shaft 42, including a first section 4211, a second section 4212, and a third section 4213 connected in sequence. The third section 4213 is correspondingly provided with the third flow channel outlet 4131, and the first section 4211 is correspondingly provided with the second flow channel outlet 4121.

[0206] When valve shaft 42 is in the first state, it moves until the third flow channel outlet 4131 is misaligned with the third section 4213. At this time, the third flow channel outlet 4131 is blocked by the outer circumferential surface of valve shaft 42, and the first section 4211 is connected to the second flow channel outlet 4121. When valve shaft 42 is in the second state, it moves until the third flow channel outlet 4131 is connected to the third section 4213, and the first section 4211 is misaligned with the second flow channel outlet 4121. At this time, the second flow channel outlet 4121 is blocked by the outer circumferential surface of valve shaft 42.

[0207] Specifically, the inner wall of the valve body 41 is recessed with two groove structures, namely a first groove structure 416 and a second groove structure. The first groove structure 416 is connected to the second flow channel inlet 4122 and the valve shaft flow channel 421, and the second groove structure is connected to the first flow channel 411 and the third flow channel inlet 4132.

[0208] In the first state and the second state, the first groove structure 416 connects the second flow channel inlet 4122 and the valve shaft flow channel 421, and the second groove structure connects the first flow channel 411 and the third flow channel inlet 4132.

[0209] See Figures 1-5 When valve shaft 42 is in the first state, the oil flow path in the reversible check valve 4 is as follows:

[0210] Part of the engine oil entering the reversible check valve 4 via the input pipe flows into the space between the valve body 41 and the valve shaft 42 through the first flow channel 411 and flows into the valve shaft flow channel 421. The engine oil in the first oil passage 13 also flows back to the second flow channel 412. The engine oil in the second flow channel 412 flows into the space between the valve body 41 and the valve shaft 42 through the second flow channel outlet 4121 and flows into the valve shaft flow channel 421. The engine oil flowing into the valve shaft flow channel 421 flows into the third flow channel 413 through the third flow channel inlet 4132. The engine oil flowing into the third flow channel 413 flows out through the second oil passage 14.

[0211] Specifically, see Figures 1-5 In the first state, the oil flow path in the second flow channel 412 within the reversible check valve 4 is: P10→P11→P12→P13→P14→P15→P16→P17. The oil eventually flows from P17 to the second oil passage 14.

[0212] For example, see Figures 7-10 When valve shaft 42 is in the second state, the oil flow path in the reversible check valve 4 is as follows:

[0213] Part of the engine oil entering the reversible check valve 4 via the input pipe enters the space between the valve body 41 and the valve shaft 42 (this space is a second groove structure) through the first flow channel 411, and then flows to the third flow channel 413 through the third flow channel inlet 4132. The engine oil in the second oil passage 14 also flows back to the third flow channel 413. The engine oil in the third flow channel 413 flows to the space between the valve body 41 and the valve shaft 42 through the third flow channel outlet 4131 and flows into the valve shaft flow channel 421. The engine oil flowing into the valve shaft flow channel 421 flows from the second flow channel inlet 4122 through the first groove structure 416 into the second flow channel 412. The engine oil flowing into the second flow channel 412 is output through the first oil passage 13.

[0214] Specifically, participate in Figures 7-10 When valve shaft 42 is in the second state, the oil flow path in the reversible check valve 4 is: P21→P22→P23→P24→P25→P26→P27. The oil eventually flows from P27 to the first oil passage 13.

[0215] Example 3

[0216] This embodiment provides an engine.

[0217] The engine includes a piston and a crankshaft, and also includes a connecting rod as described in Embodiment 2. The piston is connected to the first connecting hole 16 of the connecting rod, and the crankshaft is fixedly sleeved on the eccentric bushing 2.

[0218] The piston, connecting rod, and crankshaft of an engine form a crank-connecting rod mechanism. One end of the connecting rod reciprocates under the drive of the piston, while the other end rotates around the rotation center of the crankshaft.

[0219] The center distance of the connecting rods is variable, which in turn allows for a variable compression ratio in the engine. This enables the engine to achieve better efficiency under various operating conditions. In actual operation, the most suitable compression ratio needs to be selected based on different engine operating conditions to ensure good thermal efficiency and achieve a balance between economy and power.

[0220] The center point of the eccentric bushing 2 is the point of action of the engine crankshaft on the connecting rod.

[0221] Due to the configuration of the eccentric bushing 2, under the influence of engine inertia and burst pressure, the points of action of the engine crankshaft on the connecting rod are not at the same position. Under either inertia or burst pressure, the eccentric bushing 2 will rotate. Specifically, under inertia, the eccentric bushing 2 will rotate clockwise to its center point at the first position, at which point the center distance of the connecting rod is at its maximum. Under burst pressure, the eccentric bushing 2 will rotate clockwise to its center point at the second position, at which point the center distance of the connecting rod is at its minimum. The first and second clockwise directions are opposite.

[0222] The eccentric bushing rotation limiting mechanism restricts the rotation angle of the eccentric bushing 2. When the valve shaft 42 of the reversible check valve 4 is switched to the first state, the eccentric bushing 2 can rotate to the maximum center distance of the connecting rod under the action of inertial force. When the valve shaft 42 of the reversible check valve 4 is switched to the second state, the eccentric bushing 2 can rotate to the minimum center distance of the connecting rod under the action of burst pressure.

[0223] Optionally, in this embodiment, the engine is a two-liter engine with a cylinder bore of 82mm, the maximum adjustment range of the connecting rod is 3.4mm, and the engine compression ratio varies from 3.1 to 5.1 compression ratio units.

[0224] Example 4

[0225] This embodiment provides a car that includes the engine of Embodiment 3.

[0226] The automobile provided in this embodiment has a variable compression ratio engine. The engine can achieve better efficiency under various changing operating conditions. In actual operation, it is necessary to select the most suitable compression ratio according to different engine operating conditions, so as to obtain good thermal efficiency and make the engine balance economy and power.

[0227] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A reversible check valve capable of being installed at a connection of three lines including an input line and first and second output lines provided at an outlet of the input line, characterized in that, The reversible check valve (4) includes: A valve body (41) is provided with a valve shaft mounting cavity (415) inside the valve body (41). A first flow channel (411), a second flow channel (412), and a third flow channel (413) are provided on the outer circumferential surface of the valve body (41). The first flow channel (411) is used to connect to the input pipeline, the second flow channel (412) is used to connect to the first output pipeline, and the third flow channel (413) is used to connect to the second output pipeline. The first flow channel (411), the second flow channel (412), and the third flow channel (413) are respectively connected to the input pipeline. 2) Both the second flow channel (412) and the third flow channel (413) penetrate the side wall of the valve body (41) and extend to the valve shaft mounting cavity (415). A first valve ball (4123) is provided in the second flow channel (412), which allows the fluid in the second flow channel (412) to flow in only one direction. A second valve ball (4133) is provided in the third flow channel (413), which allows the fluid in the third flow channel (413) to flow in only one direction. A valve shaft (42) is movably disposed in the valve shaft mounting cavity (415) along its own axis. A valve shaft flow channel (421) is provided on the outer peripheral surface of the valve shaft (42). The first flow channel (411) is connected to the valve shaft flow channel (421). The valve shaft (42) can move along its own axis to switch between a first state and a second state. In the first state, the valve shaft flow channel (421) is simultaneously connected to the first flow channel (411) and the third flow channel (413), and the fluid via the reversible check valve (4) can only flow out from the third flow channel (413); In the second state, the valve shaft flow channel (421) is simultaneously connected to the first flow channel (411) and the second flow channel (412), and the fluid via the reversible check valve (4) can only flow out from the second flow channel (412).

2. The reversible check valve of claim 1, wherein, The inlet of the first flow channel (411) is located on the outer side wall of the valve body (41), the outlet of the first flow channel (411) is located on the inner side wall of the valve body (41), and the outlet of the first flow channel (411) is always connected to the third flow channel (413).

3. The reversible check valve of claim 1, wherein, The second flow channel (412) is provided with a second flow channel outlet (4121) and a second flow channel inlet (4122) that penetrate into the inner wall of the valve body (41) at both ends. The first valve ball (4123) is provided at the second flow channel inlet (4122). The first valve ball (4123) allows the fluid passing through the second flow channel (412) to flow only in the direction from the second flow channel inlet (4122) to the second flow channel outlet (4121).

4. The reversible check valve of claim 3, wherein, In the first state, the outlet of the first flow channel (411) is connected to the third flow channel (413) and simultaneously connected to the valve shaft flow channel (421), the outlet of the second flow channel (4121) is connected to the valve shaft flow channel (421), and the valve shaft flow channel (421) is connected to the third flow channel (413).

5. The reversible check valve of claim 3, wherein, In the second state, the outlet of the first flow channel (411) is connected to the third flow channel (413) and simultaneously cut off from the valve shaft flow channel (421). The outlet of the second flow channel (4121) is blocked by the outer peripheral surface of the valve shaft (42), and the inlet of the second flow channel (4122) is connected to the valve shaft flow channel (421).

6. The reversible check valve of claim 3, wherein, The third flow channel (413) is provided with a third flow channel inlet (4132) and a third flow channel outlet (4131) that penetrate into the inner wall of the valve body (41) at both ends. A second valve ball (4133) is provided at the third flow channel inlet (4132). The second valve ball (4133) allows the fluid through the third flow channel (413) to flow only in the direction from the third flow channel inlet (4132) to the third flow channel outlet (4131).

7. The reversible check valve of claim 6, wherein, In the first state, the outlet of the first flow channel (411) is connected to the inlet of the third flow channel (4132) and simultaneously connected to the valve shaft flow channel (421), and the outlet of the third flow channel (4131) is blocked by the outer peripheral surface of the valve shaft (42).

8. The reversible check valve of claim 6, wherein, In the second state, the outlet of the first flow channel (411) is connected to the inlet (4132) of the third flow channel and simultaneously cut off from the valve shaft flow channel (421), and the outlet (4131) of the third flow channel is connected to the valve shaft flow channel (421).

9. The reversible check valve of any of claims 1-8, wherein, The reversible check valve (4) further includes a movable limiting member (43). One end of the movable limiting member (43) is fixedly installed on the mounting part of the reversible check valve (4). A movable limiting groove (422) is provided on the valve shaft (42). A movable limiting member through hole (414) is provided on the valve body (41). The other end of the movable limiting member (43) passes through the movable limiting member through hole (414) and extends into the movable limiting groove (422). In the first state, the movable limiting member (43) abuts against one side wall of the movable limiting groove (422) in a direction perpendicular to the axis of the valve shaft (42). In the second state, the movable limiting member (43) abuts against the other side wall of the movable limiting groove (422) in a direction perpendicular to the axis of the valve shaft (42).

10. A connecting rod, characterized by The link includes: A connecting rod body (1) is provided at one end with a first connecting hole (16) for connecting to the piston of an engine. The other end of the connecting rod body (1) is provided with a second connecting hole (12). An eccentric bushing (2) is rotatably provided in the second connecting hole (12). The eccentric bushing (2) is configured to connect to the crankshaft of the engine. The eccentric bushing (2) can rotate around the central axis of the second connecting hole (12) so that the position of the center point of the eccentric bushing (2) changes. An oil chamber (11) is provided in the connecting rod body (1). An eccentric bushing rotation limiting mechanism includes a limiting member (31), which is connected to the eccentric bushing (2). The limiting member (31) is movably disposed in the oil cavity (11) and can extend and retract relative to the oil cavity (11) to limit the rotation angle of the eccentric bushing (2). The connecting rod body (1) is provided with a first oil passage (13) and a second oil passage (14) communicating with the oil cavity (11). A reversible one-way valve (4) as described in any one of claims 1-9 is connected between the first oil passage (13) and the second oil passage (14). One end of the first oil passage (13) is connected to the second flow channel (412) and the other end is connected to the oil cavity (11). One end of the second oil passage (14) is connected to the third flow channel (413) and the other end is connected to the oil cavity (11). Fluid entering the oil cavity (11) from the second oil passage (14) can exert a force on the limiting member (31) in a first direction. Fluid entering the oil cavity (11) from the first oil passage (13) can exert a force on the limiting member (31) in a second direction. The first direction is opposite to the second direction. The reversible check valve (4) is configured such that: engine oil enters the reversible check valve (4) through the first flow channel (411); in the first state, the engine oil is controlled to supply oil to the second oil passage (14), and the eccentric bushing (2) can only rotate in the first clockwise direction; in the second state, the engine oil is controlled to supply oil to the first oil passage (13), and the eccentric bushing (2) can only rotate in the second clockwise direction, the first clockwise direction being opposite to the second clockwise direction.

11. The connecting rod of claim 10 wherein, The connecting rod body (1) includes: The main connecting rod (17) has the first connecting hole (16) at one end and the oil chamber (11) is located on the main connecting rod (17). The semi-ring structure (18) is connected to the other end of the main connecting rod (17) to form the second connecting hole (12). The semi-ring structure (18) is provided with a reversible one-way valve mounting hole (15) for installing the reversible one-way valve (4).

12. The connecting rod of claim 11, wherein One end of the first oil passage (13) is connected to the second flow passage (412), and the other end passes through the semi-ring structure (18) and the main connecting rod (17) and is connected to the end of the oil cavity (11) near the semi-ring structure (18). One end of the second oil passage (14) is connected to the third flow passage (413), and the other end passes through the semi-ring structure (18) and the main connecting rod (17) and is connected to the other end of the oil cavity (11).

13. An engine comprising a piston and a crankshaft, characterised in that, It also includes a connecting rod as described in any one of claims 10-12, wherein the piston is connected to the first connecting hole (16) of the connecting rod, and the crankshaft is fixedly sleeved on the eccentric bushing (2).

14. An automobile characterized by Including the engine as described in claim 13.

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