Oil way system, power assembly and vehicle

Abstract

The invention discloses an oil way system, a power assembly and a vehicle. The oil way system comprises an oil pan, an oil inlet and an oil outlet, and the oil storage box is communicated with the oil pan so as to control the height of oil in the oil pan. According to the oil way system, by arranging the oil storage box, on one hand, the height of oil in the oil pan can be reduced under the working condition that the requirement of a vehicle for the height of oil in the oil pan is low, so that dragging loss caused by oil stirring of parts in the power assembly is reduced, and the efficiency of the power assembly is improved; when the inclination angle of a vehicle is large or the requirement for lubricating and cooling is high, the oil liquid height of the oil pan can be increased, and the working requirement of a power assembly is met.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an oil circuit system, a power assembly and a vehicle. Background Art

[0002] In the powertrain of a vehicle, there is a portion of oil in the oil pan for lubrication and cooling. When the powertrain is working, the oil will flow between the oil pan and the actuating parts in the powertrain. In related technologies, the amount of oil in the oil pan has a great impact on the powertrain, affecting the working efficiency of the powertrain. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to provide an oil circuit system, which can improve the efficiency of the powertrain.

[0004] The present invention also provides a power assembly having the oil circuit system.

[0005] The present invention also provides a vehicle having the power assembly.

[0006] The oil circuit system according to the first aspect of the present invention comprises: an oil pan; and an oil storage box, wherein the oil storage box is communicated with the oil pan to control the oil level in the oil pan.

[0007] According to the oil circuit system of the first aspect of the present invention, on the one hand, the oil height in the oil pan can be lowered under operating conditions where the vehicle has a low requirement for the oil height in the oil pan, thereby reducing the drag loss caused by oil stirring of the internal components of the powertrain and improving the efficiency of the powertrain. On the other hand, when the vehicle has a large tilt angle or a high lubrication and cooling demand, the oil height in the oil pan can be increased to meet the working needs of the powertrain.

[0008] According to some embodiments of the present invention, the oil circuit system further includes: an oil driving component, which is connected between the oil storage box and the oil pan, and is used to drive the oil to flow between the oil pan and the oil storage box.

[0009] According to some embodiments of the present invention, the oil circuit system further includes: a first control valve, wherein the first control valve is connected between the oil storage box and the oil pan, and the oil storage box is configured to control the oil height in the oil pan through the first control valve.

[0010] According to some embodiments of the present invention, the oil circuit system further includes: an oil driving component, which is connected between the first control valve and the oil pan, and is used to drive the oil to flow between the oil pan and the oil storage box.

[0011] According to some embodiments of the present invention, the oil circuit system also includes: an oil supply circuit, the inlet of the oil supply circuit is connected to the oil pan, the outlet of the oil supply circuit is connected to a plurality of parts to be lubricated and the first control valve, and the oil drive component is connected in series to the oil supply circuit for driving the oil in the oil supply circuit to flow from the inlet to the outlet.

[0012] According to some embodiments of the present invention, the oil storage box has an oil storage cavity and a first oil port communicating with the oil storage cavity, and the first control valve is disposed between the first oil port and the oil pan.

[0013] According to some embodiments of the present invention, the first control valve includes a first passage and a second passage, and the first control valve has a first state and a second state. In the first state, the first passage is connected between the oil supply circuit and the first oil port so that the oil in the oil supply circuit enters the oil storage chamber through the first oil port. In the second state, the second passage is connected between the first oil port and the oil pan so that the oil in the oil storage chamber enters the oil pan through the first oil port.

[0014] According to some embodiments of the present invention, the oil circuit system also includes: a hydraulic oil circuit and a hydraulic drive component, the hydraulic oil circuit is connected to the oil pan, the hydraulic drive component is suitable for driving the oil in the oil pan to flow in the hydraulic oil circuit, and the hydraulic oil circuit is suitable for connecting to the first control valve to drive the first control valve to switch between the first state and the second state through the oil in the hydraulic oil circuit.

[0015] According to some embodiments of the present invention, the hydraulic oil circuit includes: a main oil circuit, a first branch and a second branch, one end of the main oil circuit is connected to the oil pan, the first branch and the second branch are both connected to the other end of the main oil circuit, the oil outlet end of the first branch is connected to the first control valve, and the oil outlet end of the second branch is connected to the clutch.

[0016] According to some embodiments of the present invention, a second control valve is connected in series to the first branch, and the second control valve is used to control the on-off of the first branch.

[0017] According to some embodiments of the present invention, the oil circuit system further includes: a clutch solenoid valve, the clutch solenoid valve is connected in series to the second branch, and the clutch solenoid valve is used to control the flow of the second branch.

[0018] According to some embodiments of the present invention, the hydraulic oil circuit also includes: a third branch, one end of the third branch is connected to the second branch between the clutch solenoid valve and the clutch, the other end of the third branch is connected to the first control valve, and a first one-way valve is connected in series to the third branch, and the first one-way valve is configured to allow oil to flow in one direction toward the first control valve.

[0019] According to some embodiments of the present invention, the hydraulic oil circuit also includes: a third branch, one end of the third branch is connected to the second branch between the clutch solenoid valve and the clutch, and the other end of the third branch is connected to the first control valve, wherein when the second control valve is opened and the first branch is connected, the clutch solenoid valve is opened and the second branch is connected.

[0020] According to some embodiments of the present invention, the oil circuit system also includes: a regulating oil circuit, one end of which is connected to the first branch between the second control valve and the first control valve, and the other end of the regulating oil circuit is connected to the oil supply circuit, a second one-way valve is connected in series to the regulating oil circuit, and the second one-way valve is configured to allow oil to flow in one direction toward the oil supply circuit.

[0021] According to some embodiments of the present invention, the oil storage box also has a second oil port connected to the oil storage chamber, and the oil circuit system also includes: a first oil circuit, the first oil circuit is connected between the second oil port and the clutch, a third control valve is connected in series on the first oil circuit, and the oil in the oil storage chamber is suitable for flowing to the clutch through the second oil port and the first oil circuit.

[0022] According to some embodiments of the present invention, in the up and down direction, the height of the second oil port is higher than the height of the clutch, and the oil storage box is configured to allow the oil in the oil storage chamber to flow toward the clutch through the second oil port under the action of gravity.

[0023] According to some embodiments of the present invention, the first control valve is connected to the first oil circuit, and the first control valve further has a third passage. In the second state, the third passage is connected between the oil supply circuit and the first oil circuit.

[0024] According to some embodiments of the present invention, the first control valve includes: a shell, a accommodating chamber and a first interface are formed in the shell, the first interface is connected between the accommodating chamber and the hydraulic oil circuit; a valve core, the valve core is movably arranged in the accommodating chamber between a first position and a second position, in the first position, the first control valve is in a second state, and in the second position, the first control valve is in a second state, and the hydraulic oil circuit is suitable for driving the valve core to move from the first position to the second position.

[0025] According to some embodiments of the present invention, the first control valve further includes: a reset member, which is disposed in the accommodating chamber and is configured to always drive the valve core to move from the second position toward the first position.

[0026] According to some embodiments of the present invention, the shell is provided with a second interface, a third interface, a fourth interface and a fifth interface connected to the accommodating chamber, the second interface is connected to the first oil circuit, the third interface is connected to the first oil port, the fourth interface is connected to the oil supply circuit, and the fifth interface is connected to the oil pan. In the first position, the valve core makes the third interface connected to the fourth interface through the accommodating chamber, and in the second position, the second interface is connected to the fourth interface through the accommodating chamber, and the third interface is connected to the fifth interface through the accommodating chamber.

[0027] According to some embodiments of the present invention, the oil supply circuit includes: a first branch, a second branch and an output oil circuit, the first branch and the second branch are connected in parallel between the output oil circuit and the oil pan, and the oil drive component includes: a first pump and a second pump, the first pump is connected in series to the first branch, and the second pump is connected in series to the second branch.

[0028] According to some embodiments of the present invention, the oil circuit system further includes: a hydraulic oil circuit and a hydraulic drive component, the hydraulic oil circuit is connected to the oil pan, the hydraulic drive component is suitable for driving the oil in the oil pan to flow in the hydraulic oil circuit, and the hydraulic drive component and the second pump are integrated into one.

[0029] A powertrain according to a second aspect of the present invention comprises: the oil circuit system according to the first aspect of the present invention.

[0030] According to the power assembly of the second aspect of the present invention, by providing the oil circuit system according to the first aspect of the present invention, the efficiency of the power assembly can be improved.

[0031] A vehicle according to a third aspect of the present invention comprises: the powertrain according to the second aspect of the present invention.

[0032] The vehicle according to the third aspect of the present invention can improve the efficiency of the vehicle by providing the powertrain according to the second aspect of the present invention.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1is a schematic diagram of an oil circuit system according to an embodiment of the present invention;

[0035] Figure 2 yes Figure 1 A cross-sectional view of the first control valve shown in the first state;

[0036] Figure 3 yes Figure 1 sectional view of the first control valve in the second state.

[0037] Reference numerals:

[0038] 100. Oil system;

[0039] 10. Oil pan;

[0040] 20. Oil storage box; 21. First oil port; 22. Second oil port;

[0041] 30. first control valve; 31. housing; 311. accommodating chamber; 312. first interface; 313. second interface; 314. third interface; 315. fourth interface; 316. fifth interface; 32. valve core; 33. reset member;

[0042] 40. Hydraulic drive parts;

[0043] 50, main oil circuit; 51, first branch; 511, second control valve; 52, second branch; 521, clutch solenoid valve; 522, buffer valve; 523, clutch pressure sensor; 53, third branch; 531, first check valve; 54, control oil circuit; 541, second check valve; 55, safety valve; 56, main pressure sensor;

[0044] 60. Clutch; 61. First oil circuit; 611. Third control valve;

[0045] 70, first branch; 71, second branch; 72, output oil circuit; 73, first pump; 731, mechanical pump check valve; 74, second pump; 741, electronic pump check valve;

[0046] 80. Oil cooler; 81. Filter; 82. Bypass valve;

[0047] 91, second oil circuit; 911, first motor branch; 912, second motor branch; 913, third motor branch;

[0048] 92, the third oil circuit;

[0049] 93, fourth oil circuit; 931, first generator branch; 932, second generator branch; 933, third generator branch; 934, generator cooling solenoid valve;

[0050] 95. Fifth oil line. DETAILED DESCRIPTION

[0051] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0052] Reference below Figure 1-Figure 3 An oil circuit system 100 according to an embodiment of a first aspect of the present invention is described.

[0053] like Figure 1 As shown, the oil circuit system 100 according to the first embodiment of the present invention comprises: an oil pan 10 and an oil storage box 20. The oil storage box 20 is communicated with the oil pan 10 to control the oil height in the oil pan 10.

[0054] Among them, it can be understood that the amount of oil in the powertrain is certain. By setting up the oil storage box 20, the oil can be transferred between the oil pan 10 and the oil storage box 20. Specifically, when the oil in the oil storage box 20 increases, the oil in the oil pan 10 decreases, and when the oil in the oil storage box 20 decreases, the oil in the oil pan 10 increases. Therefore, by adjusting the oil reserve in the oil storage box 20, the oil reserve in the oil pan 10 can be adjusted, thereby realizing the adjustment of the oil height in the oil pan 10.

[0055] It is understandable to those skilled in the art that when there is a large amount of oil in the oil pan 10, the moving parts in the powertrain extend deeper into the oil when in contact with the oil, or when the amount of oil in contact is large, the resistance of the moving parts to the oil is large, which will cause a large drag loss of the powertrain and affect the efficiency of the powertrain.

[0056] Under some operating conditions of the vehicle, the powertrain has lower requirements for the oil height in the oil pan 10. For example, when the ground on which the vehicle is located is relatively flat, the oil height change in the oil pan 10 during the driving of the vehicle is relatively low. At this time, the normal operation of the powertrain has lower requirements for the oil height in the oil pan 10. The vehicle controls the oil to enter the oil storage box 20 to lower the oil level in the oil pan 10 to a height that can support the normal operation of the powertrain. In this way, the depth to which the moving parts in the powertrain extend into the oil and the degree of contact with the oil can be reduced, thereby reducing the drag loss of the powertrain.

[0057] When the ground on which the vehicle is located has a large slope or large fluctuations, the oil in the oil pan 10 will shift. In order to ensure that the oil height in the oil pan 10 can meet the working needs of the powertrain, it is necessary to increase the amount of oil in the powertrain. The vehicle controls the oil in the oil storage box 20 to enter the oil pan 10, so that the oil height in the oil pan 10 is raised, thereby meeting the working needs of the powertrain.

[0058] According to the oil circuit system 100 of the first aspect of the present invention, by providing an oil storage box 20, on the one hand, when the vehicle has a low requirement for the oil height in the oil pan 10, the oil height in the oil pan 10 is lowered, which can reduce the drag loss caused by oil stirring of the internal components of the powertrain and improve the efficiency of the powertrain. On the other hand, when the vehicle has a large tilt angle or a high lubrication and cooling demand, the oil height in the oil pan 10 can be increased to meet the working needs of the powertrain.

[0059] In some embodiments of the present invention, the oil circuit system 100 further includes: an oil driving member, which is connected between the oil storage box 20 and the oil pan 10, and is used to drive the oil to flow between the oil pan 10 and the oil storage box 20. By providing the oil driving member, a driving force can be provided for the flow of the oil between the oil storage box 20 and the oil pan 10, so that the oil storage box 20 can adjust the oil height of the oil pan 10.

[0060] In some embodiments of the present invention, the oil circuit system 100 further includes: a first control valve 30, the first control valve 30 is connected between the oil storage box 20 and the oil pan 10, and the oil storage box 20 is configured to control the oil height in the oil pan 10 through the first control valve 30. In this way, the oil height in the oil pan 10 is controlled by changing the state of the first control valve 30, and the control logic is relatively simple, which can reduce the difficulty of product design.

[0061] In some embodiments of the present invention, the oil circuit system 100 further includes: an oil driving member, which is connected between the first control valve 30 and the oil pan 10, and is used to drive the oil to flow between the oil pan 10 and the oil storage box 20. Therefore, during the operation of the powertrain, the oil driving member can provide a driving force for the movement of the oil, and the first control valve 30 can control the connection state between the oil pan 10 and the oil storage box 20, thereby adjusting the oil height in the oil pan 10.

[0062] In some embodiments of the present invention, Figure 1 As shown, the oil circuit system 100 also includes: an oil supply circuit, the inlet of the oil supply circuit is connected to the oil pan 10, the outlet of the oil supply circuit is connected to multiple parts to be lubricated and the first control valve 30, and the oil drive component is connected in series to the oil supply circuit to drive the oil in the oil supply circuit to flow from the inlet to the outlet.

[0063] During the operation of the powertrain, the oil driving component drives the oil in the oil pan 10 to flow along the oil supply path, wherein a portion of the oil flows to the parts to be lubricated, and the oil lubricates and cools the parts to be lubricated, and the other portion of the oil flows to the first control valve 30, and the first control valve 30 controls whether the oil enters the first oil port 21, thereby realizing the control of the oil height in the oil pan 10.

[0064] In some embodiments of the present invention, Figure 1 As shown, the oil storage box 20 has an oil storage cavity and a first oil port 21 connected to the oil storage cavity, and the first control valve 30 is arranged between the first oil port 21 and the oil pan 10. During the operation of the power assembly, the flow direction of the oil can be adjusted by adjusting the connection state between the first control valve 30 and the first oil port 21, so that the control logic can be further simplified and the difficulty of product design can be reduced.

[0065] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the first control valve 30 includes a first passage and a second passage. The first control valve 30 has a first state and a second state. In the first state, the first passage is connected between the oil supply circuit and the first oil port 21, so that the oil in the oil supply circuit enters the oil storage chamber through the first oil port 21. In the second state, the second passage is connected between the first oil port 21 and the oil pan 10, so that the oil in the oil storage chamber enters the oil pan 10 through the first oil port 21.

[0066] In the first state, the oil in the oil supply circuit enters the oil storage chamber through the first oil port 21, which can increase the amount of oil in the oil storage chamber, reduce the amount of oil in the oil pan 10, and reduce the oil level in the oil pan 10. In the second state, the oil in the oil storage chamber enters the oil pan 10 through the first oil port 21, which increases the amount of oil in the oil pan 10 and increases the oil level. Therefore, during the operation of the powertrain, the oil level in the oil pan 10 can be adjusted by switching the first control valve 30 between the first state and the second state.

[0067] In some embodiments of the present invention, Figure 1 As shown, the oil circuit system 100 also includes: a hydraulic oil circuit and a hydraulic drive component 40, the hydraulic oil circuit is connected to the oil pan 10, the hydraulic drive component 40 is suitable for driving the oil in the oil pan 10 to flow in the hydraulic oil circuit, and the hydraulic oil circuit is suitable for connecting to the first control valve 30 to drive the first control valve 30 to switch between the first state and the second state through the oil in the hydraulic oil circuit.

[0068] It can be understood that the hydraulic drive has a higher reliability, which can improve the reliability of switching the first control valve 30 between the first state and the second state during the operation of the powertrain, and the hydraulically driven first control valve 30 has a lower protection requirement in the oil environment within the powertrain, which can reduce the difficulty of product design and production.

[0069] In some embodiments of the present invention, Figure 1 As shown, the hydraulic oil circuit includes: a main oil circuit 50, a first branch circuit 51 and a second branch circuit 52. One end of the main oil circuit 50 is connected to the oil pan 10, and the first branch circuit 51 and the second branch circuit 52 are both connected to the other end of the main oil circuit 50. The oil outlet end of the first branch circuit 51 is connected to the first control valve 30, and the oil outlet end of the second branch circuit 52 is connected to the clutch 60.

[0070] During the operation of the power assembly, the hydraulic drive component 40 can drive the oil through the main oil circuit 50 and the first branch circuit 51 to control the first control valve 30, and the hydraulic drive component 40 can also drive the oil through the main oil circuit 50 and the second branch circuit 52 to drive the clutch 60 to switch the state.

[0071] Among them, by sharing a part of the hydraulic oil circuit between the first control valve 30 and the clutch 60, the space in the power assembly can be reasonably utilized, thereby reducing the difficulty of designing the power assembly.

[0072] In some embodiments of the present invention, Figure 1 As shown, the first branch 51 is connected in series with a second control valve 511, and the second control valve 511 is used to control the on and off of the first branch 51. During the operation of the power assembly, when the hydraulic drive 40 drives the oil to switch the state of the clutch 60 through the main oil circuit 50 and the second branch 52, the second control valve 511 can control the first branch 51 to be turned on. When the first branch 51 is turned on, the oil drives the first control valve 30 to switch from the first state to the second state through the first branch 51. The second control valve 511 can also control the second branch 52 to be turned off, thereby realizing the differentiated working process of the power assembly and meeting more working conditions.

[0073] In some embodiments of the present invention, Figure 1 As shown, the oil circuit system 100 further includes: a clutch solenoid valve 521, which is connected in series to the second branch 52, and is used to control the flow of the second branch 52. By setting the clutch solenoid valve 521, the clutch solenoid valve 521 adjusts the flow on the second branch 52, so that the hydraulic pressure on the clutch 60 can be adjusted.

[0074] It should be noted that when the clutch solenoid valve 521 controls the flow of the second branch 52 to be zero, the clutch solenoid valve 521 disconnects the second branch 52. During the operation of the powertrain, when the second control valve 511 controls the first branch 51 to be turned on, the clutch solenoid valve 521 can close the second branch 52, so that the hydraulic oil circuit independently controls the state of the first control valve 30, thereby meeting more working conditions of the powertrain.

[0075] In some embodiments of the present invention, Figure 1 As shown, the hydraulic oil circuit also includes: a third branch 53, one end of the third branch 53 is connected to the second branch 52 between the clutch solenoid valve 521 and the clutch 60, the other end of the third branch 53 is connected to the first control valve 30, and a first one-way valve 531 is connected in series to the third branch 53, and the first one-way valve 531 is configured to allow oil to flow in one direction toward the first control valve 30.

[0076] During the operation of the powertrain, when the clutch solenoid valve 521 opens the second branch 52, the hydraulic drive component 40 drives the oil through the main oil circuit 50 and the second branch 52 to close the clutch 60. At the same time, the oil in the second branch 52 can be connected to the first control valve 30 through the third branch 53, thereby driving the first control valve 30 to switch from the first state to the second state. It can be understood that when the clutch 60 is closed, the engine in the powertrain participates in the driving, and the powertrain has a large demand for oil for lubrication and cooling. At this time, the first control valve 30 switches to the second state, and the oil in the oil storage chamber enters the oil pan 10, thereby increasing the amount of oil involved in lubrication and cooling in the powertrain.

[0077] Among them, by setting the first one-way valve 531, when the second control valve 511 controls the first branch 51 to be connected and the clutch solenoid valve 521 controls the second branch 52 to be disconnected, the first one-way valve 531 can prevent the oil in the first branch 51 from entering the second branch 52 through the third branch 53 and acting on the clutch 60, thereby avoiding accidental contact of the clutch 60 by the hydraulic oil during the operation of the powertrain.

[0078] Preferably, the first branch path 51 and the third branch path 53 are in communication with the first control valve 30 via throttle holes.

[0079] In some embodiments of the present invention, the hydraulic oil circuit also includes: a third branch 53, one end of the third branch 53 is connected to the second branch 52 between the clutch solenoid valve 521 and the clutch 60, and the other end of the third branch 53 is connected to the first control valve 30, wherein when the second control valve 511 is opened and the first branch 51 is connected, the clutch solenoid valve 521 is opened and the second branch 52 is connected.

[0080] When the clutch solenoid valve 521 is opened and conducts the second branch 52, the clutch 60 is closed, the engine in the powertrain participates in driving, and the powertrain has a large demand for oil for lubrication and cooling. At the same time, the oil in the second branch 52 enters the third branch 53, and the second control valve 511 is opened to conduct the first branch 51. The oil controls the first control valve 30 to switch to the second state through the first branch 51 and the third branch 53, and the oil in the oil storage chamber enters the oil pan 10, thereby increasing the amount of oil involved in lubrication and cooling in the powertrain. In this way, the structure of the hydraulic oil circuit can be simplified and the production cost of the powertrain can be reduced.

[0081] In some embodiments of the present invention, Figure 1 As shown, the oil circuit system 100 also includes: a regulating oil circuit 54, one end of the regulating oil circuit 54 is connected to the first branch 51 located between the second control valve 511 and the first control valve 30, and the other end of the regulating oil circuit 54 is connected to the oil supply circuit, and a second one-way valve 541 is connected in series to the regulating oil circuit 54, and the second one-way valve 541 is configured to allow oil to flow in one direction toward the oil supply circuit.

[0082] During the operation of the powertrain, when the powertrain has a large demand for oil for cooling and lubrication, the second control valve 511 controls the first branch 51 to be turned on, and the first control valve 30 switches from the first state to the second state. The oil in the oil storage chamber enters the oil pan 10 through the second passage. At the same time, the oil in the main oil circuit 50 can enter the oil supply circuit through the first branch 51 and the regulating oil circuit 54, which can increase the flow rate of the oil involved in lubrication and cooling in the oil supply circuit. Therefore, during the operation of the powertrain, by switching the working states of the second control valve 511 and the hydraulic drive component 40, the amount of oil in the oil supply circuit can be adjusted to meet more working conditions of the powertrain.

[0083] In some embodiments of the present invention, Figure 1 As shown, the oil storage box 20 also has a second oil port 22 connected to the oil storage chamber, and the oil circuit system 100 also includes: a first oil circuit 61, the first oil circuit 61 is connected between the second oil port 22 and the clutch 60, and a third control valve 611 is connected in series to the first oil circuit 61. The oil in the oil storage chamber is suitable for flowing to the clutch 60 through the second oil port 22 and the first oil circuit 61.

[0084] During the operation of the powertrain, when the clutch 60 needs to be lubricated and cooled, and there is sufficient oil in the oil storage chamber, the first oil circuit 61 is in a conducting state, and the oil in the oil storage chamber flows to the clutch 60 through the second oil port 22 and the first oil circuit 61 to cool and lubricate the clutch 60.

[0085] Preferably, the first oil passage 61 is connected to the clutch 60 through a throttle hole. The third control valve 611 is a shuttle valve, or the third control valve 611 is a one-way valve.

[0086] When the third control valve 611 is a shuttle valve, when the third passage connects the oil supply passage and the first oil passage 61, the shuttle valve can connect the first oil passage 61 with the third passage and the oil pressure in the second oil port 22, thereby ensuring the cooling efficiency of the clutch 60.

[0087] When the third control valve 611 is a one-way valve, the oil supply circuit can supply oil to the first oil circuit 61 through the third passage, and the oil storage chamber can supply oil to the first oil circuit 61 through the second oil port 22, thereby improving the cooling efficiency of the clutch 60.

[0088] In some embodiments of the present invention, in the vertical direction, the height of the second oil port 22 is higher than the height of the clutch 60, and the oil storage box 20 is configured to allow the oil in the oil storage chamber to flow to the clutch 60 through the second oil port 22 under the action of gravity. In this way, the driving method of the oil in the oil storage chamber to flow to the clutch 60 through the second oil port 22 and the first oil path 61 can be simplified, thereby reducing the difficulty of product design and reducing production costs.

[0089] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the first control valve 30 is connected to the first oil circuit 61, and the first control valve 30 also has a third passage. In the second state, the third passage is connected between the oil supply circuit and the first oil circuit 61. Among them, the first control valve 30 is connected to the upstream position of the third control valve 611 in the first oil circuit 61. When the clutch 60 needs to be cooled more, the first control valve 30 switches to the second state, and the oil supply circuit supplies oil to the first oil circuit 61 through the third passage. It can be understood that the oil pressure of the oil supply circuit is greater than the oil pressure of the second oil port 22. When the third control valve 611 is a shuttle valve or a one-way valve, the oil flow acting on the clutch 60 can be increased, thereby meeting more working conditions of the powertrain.

[0090] In some embodiments of the present invention, Figure 1 As shown, the oil circuit system 100 also includes a safety valve 55 and a main pressure sensor 56. The main pressure sensor 56 is connected to the main oil circuit 50 to detect the pressure of the main oil circuit 50. One end of the safety valve 55 is connected to the main oil circuit 50, and the other end of the safety valve 55 is connected to the oil pan 10. When the oil pressure of the main oil circuit 50 is greater than a set threshold, the safety valve 55 opens, and the oil in the main oil circuit 50 is discharged into the oil pan 10 through the safety valve 55, thereby achieving pressure relief for the main oil circuit 50.

[0091] In some embodiments of the present invention, Figure 1As shown, the oil circuit system 100 also includes a buffer valve 522 and a clutch pressure sensor 523. The clutch pressure sensor 523 is connected to the second branch 52 to detect the pressure acting on the clutch 60 by the second branch 52. The buffer valve 522 is connected to the second branch 52. The buffer valve 522 can buffer the oil pressure of the second branch 52, thereby improving the stability of the hydraulic pressure of the second branch 52 on the clutch 60.

[0092] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the first control valve 30 includes a housing 31 and a valve core 32 .

[0093] Specifically, a accommodating chamber 311 and a first interface 312 are formed in the shell 31. The first interface 312 is connected between the accommodating chamber 311 and the hydraulic oil circuit. The valve core 32 is movably arranged in the accommodating chamber 311 between a first position and a second position. In the first position, the first control valve 30 is in the second state. In the second position, the first control valve 30 is in the second state. The hydraulic oil circuit is suitable for driving the valve core 32 to move from the first position to the second position.

[0094] Thus, the first control valve 30 can be switched between the first state and the second state, and the control logic of the first control valve 30 is relatively simple, which can improve the reliability of state switching during the operation of the first control valve 30.

[0095] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the first control valve 30 further includes: a reset member 33 , which is disposed in the accommodating chamber 311 , and is configured to always drive the valve core 32 to move from the second position toward the first position.

[0096] During the operation of the powertrain, when the first control valve 30 needs to switch from the first state to the second state, the oil in the hydraulic oil circuit enters the accommodating chamber 311 through the first interface 312, and pushes the valve core 32 to move from the first position to the second position. When the first control valve 30 needs to switch from the second state to the first state, the hydraulic oil circuit stops supplying oil to the first joint, and under the push of the reset member 33, the valve core 32 moves from the second position to the first position, thereby realizing the switching of the first control valve 30 between the first state and the second state.

[0097] Among them, the oil in the main oil circuit 50 of the hydraulic oil circuit can enter the first interface 312 through one of the first branch 51 and the third branch 53, and the oil in the main oil circuit 50 of the hydraulic oil circuit can also enter the first interface 312 through the first branch 51 and the third branch 53.

[0098] Preferably, the reset member 33 is a reset spring.

[0099] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, the housing 31 is also provided with a second interface 313, a third interface 314, a fourth interface 315 and a fifth interface 316 which are connected to the accommodating chamber 311. The second interface 313 is connected to the first oil circuit 61, the third interface 314 is connected to the first oil port 21, the fourth interface 315 is connected to the oil supply circuit, and the fifth interface 316 is connected to the oil pan 10. In the first position, the valve core 32 enables the third interface 314 to be connected to the fourth interface 315 through the accommodating chamber 311. In the second position, the second interface 313 is connected to the fourth interface 315 through the accommodating chamber 311, and the third interface 314 is connected to the fifth interface 316 through the accommodating chamber 311.

[0100] That is to say, in the first position, a first passage is formed by the third interface 314, the accommodating chamber 311 and the fourth interface 315 to connect the oil supply circuit and the first oil port 21; in the second position, the third interface 314, the accommodating chamber 311 and the fifth interface 316 form a second passage to connect the first oil port 21 and the oil pan 10; the second interface 313, the accommodating chamber 311 and the fourth interface 315 form a third passage to connect the first oil circuit 61 and the oil supply circuit.

[0101] Thus, the first passage, the second passage and the third passage can be arranged in the first control valve 30, and the structure of the first control valve 30 is relatively simple, which can reduce the difficulty of product design and production.

[0102] In some embodiments of the present invention, Figure 1 As shown, the oil supply circuit includes: a first branch 70, a second branch 71 and an output oil circuit 72. The first branch 70 and the second branch 71 are connected in parallel between the output oil circuit 72 and the oil pan 10. The oil drive component includes: a first pump 73 and a second pump 74. The first pump 73 is connected in series to the first branch 70, and the second pump 74 is connected in series to the second branch 71.

[0103] During the operation of the powertrain, the first pump 73 and the second pump 74 may work separately, and the first pump 73 drives the oil in the oil pan 10 to be output from the output oil circuit 72 through the first branch 70, or the second pump 74 drives the oil in the oil pan 10 to be output from the output oil circuit 72 through the second branch 71. Alternatively, the first pump 73 and the second pump 74 may work simultaneously, and the first pump 73 and the second pump 74 respectively drive the oil in the oil pan 10 to flow in the first branch 70 and the second branch 71, and then the oil in the first branch 70 and the second branch 71 merge in the output oil circuit 72 and are output to the outside. Therefore, during the operation of the powertrain, the oil supply line and flow rate of the oil supply circuit can be adjusted according to the working status of the first pump 73 and the second pump 74, so as to meet more working conditions.

[0104] Preferably, the first pump 73 is a mechanical pump and is suitable for being driven by an engine, and the second pump 74 is an electronic pump and is suitable for being driven by a battery.

[0105] Under different operating conditions of the vehicle, the vehicle can adjust the operating states of the first pump 73 and the second pump 74 according to the operating states of the engine and the drive motor.

[0106] For example, when the vehicle is in a pure electric driving condition, the battery drives the second pump 74 to work, and the second pump 74 drives the oil to lubricate and cool the drive motor through the second branch 71 and the output oil circuit 72.

[0107] When the engine drives the generator to charge the battery, the engine drives the first pump 73 to cool the engine and the generator through the first branch 70 and the output oil circuit 72. When the oil delivery power of the first pump 73 is insufficient, the battery can drive the second pump 74 to work, and the second pump 74 drives the oil to enter the output oil circuit 72 through the second branch 71. At the same time, the hydraulic drive component 40 can also work, and the hydraulic drive component 40 drives the oil to enter the output oil circuit 72 through the main oil circuit 50, the first branch circuit 51, and the regulating oil circuit 54.

[0108] When the engine and the drive motor drive the vehicle together, the engine drives the first pump 73 to work, and at the same time, the battery drives the second pump 74 to work, and the oil enters the output oil circuit 72 through the first branch 70 and the second branch 71, and the hydraulic drive component 40 drives the oil through the main oil circuit 50 and the second branch 52 to push the clutch 60 to close. Under the action of the oil in the third branch 53, the second control valve 511 switches to the second state, and the oil supply circuit is connected with the first oil circuit 61 through the third passage. The oil in the oil supply circuit lubricates and cools the clutch 60 through the third passage and the first oil circuit 61. The second control valve 511 and the third control valve 611 can control the cooling flow of the clutch 60.

[0109] In this way, more working conditions of the powertrain can be met.

[0110] Among them, preferably, a mechanical pump one-way valve 731 is also connected in series on the first branch 70, and the mechanical pump one-way valve 731 is connected to the downstream of the first pump 73. The first branch 70 is connected to the mechanical pump one-way valve 731 through a throttle hole, thereby preventing the oil on the second branch 71 from flowing to the first pump 73 through the first branch 70 and causing damage to the first pump 73. An electronic pump one-way valve 741 is connected in series on the second branch 71, and the electronic pump one-way valve 741 is connected to the downstream of the second pump 74. The second branch 71 is connected to the electronic pump one-way valve 741 through a throttle hole, thereby preventing the oil on the first branch 70 from flowing to the second pump 74 through the second branch 71 and causing damage to the second pump 74.

[0111] In some embodiments of the present invention, Figure 1 As shown, the oil circuit system 100 further includes: a hydraulic oil circuit and a hydraulic drive member 40, the hydraulic oil circuit is connected to the oil pan 10, the hydraulic drive member 40 is suitable for driving the oil in the oil pan 10 to flow in the hydraulic oil circuit, and the hydraulic drive member 40 and the second pump 74 are integrated into one body. In this way, the structure of the oil circuit system 100 can be further simplified, thereby further reducing the difficulty of design and production.

[0112] Preferably, both the second pump and the hydraulic drive 40 are electronic pumps and are adapted to be driven by batteries.

[0113] In some embodiments of the present invention, Figure 1 As shown, the oil circuit system 100 further includes: an oil cooler 80 and a filter 81, which are connected in series to the output oil circuit 72. The oil cooler 80 can cool the oil, thereby improving the cooling efficiency of the powertrain, and the filter 81 can filter the oil, thereby improving the cleanliness of the oil during the circulation process, thereby improving the reliability of the powertrain.

[0114] In some embodiments of the present invention, Figure 1 As shown, in the flow direction of the output oil circuit 72, the filter 81 is located downstream of the oil cooler 80, and the oil circuit system 100 also includes: a bypass valve 82, one end of the bypass valve 82 is connected to the output oil circuit 72 upstream of the oil cooler 80, and the other end of the bypass valve 82 is connected to the output oil circuit 72 downstream of the filter 81.

[0115] It is understandable that during the operation of the power system, under some working conditions, the temperature of the oil is low and the viscosity of the oil is high, which makes the oil resistance through the oil cooler 80 and the filter 81 too high, and may cause insufficient oil flow after passing through the oil cooler 80 and the filter 81. This may cause insufficient cooling and lubrication oil in the power system, affecting the reliability of the power system. By setting the bypass valve 82, when the oil resistance on the output oil circuit 72 is too high, the bypass valve 82 can connect the oil circuit between the upstream of the oil cooler 80 and the downstream of the filter 81, so that the output oil circuit 72 can output a sufficient flow of oil, thereby improving the reliability of the power system.

[0116] Preferably, both ends of the bypass valve 82 are connected to the output oil circuit 72 through a throttle hole. During the operation of the power system, when the oil pressure difference at both ends of the bypass valve 82 reaches a set threshold, the bypass valve 82 is in an open state.

[0117] In some embodiments of the present invention, Figure 1 As shown, the oil circuit system 100 also includes: a second oil circuit 91, the second oil circuit 91 is connected between the output oil circuit 72 and the drive motor, when the drive motor needs to be cooled during the operation of the power assembly, the oil in the output oil circuit 72 acts on the drive motor through the second oil circuit 91, wherein the second oil circuit 91 has a first motor branch 911, a second motor branch 912 and a third motor branch 913, and the first motor branch 911, the second motor branch 912 and the third motor branch 913 are respectively connected to the motor stator, the motor rotor and the motor bearing through throttle holes.

[0118] In some embodiments of the present invention, Figure 1 As shown, the oil circuit system 100 also includes: a third oil circuit 92, which is connected between the output oil circuit 72 and the gear shaft. During the operation of the powertrain, when the gear shaft needs to be cooled, the oil in the output oil circuit 72 acts on the gear shaft through the third oil circuit 92, wherein the third oil circuit 92 is connected to the gear shaft through a throttle hole.

[0119] In some embodiments of the present invention, Figure 1As shown, the oil circuit system 100 also includes: a fourth oil circuit 93 and a fifth oil circuit 95, the fourth oil circuit 93 and the fifth oil circuit 95 are connected in parallel between the generator and the output oil circuit 72, wherein a generator cooling solenoid valve 934 is connected in series to the fourth oil circuit 93, and the generator cooling solenoid valve 934 can control the on-off of the fourth oil circuit 93, the fourth oil circuit 93 is connected to the generator stator, the generator rotor and the generator bearing through the first generator branch 931, the second generator branch 932 and the third generator branch 933 respectively, the first generator branch 931, the second generator branch 932 and the third generator branch 933 are connected to the generator stator, the generator rotor and the generator bearing through the throttle hole respectively, and the fifth oil circuit 95 is connected to the generator through the throttle hole.

[0120] During the operation of the powertrain, the output oil circuit 72 can transport oil toward the generator through the fifth oil circuit 95 and the throttle hole. When the oil flow in the fifth oil circuit 95 is insufficient to meet the needs of the generator, the generator cooling solenoid valve 934 opens the fourth oil circuit 93, and the output oil circuit 72 transports oil to the generator through the fourth oil circuit 93.

[0121] The powertrain according to the second embodiment of the present invention comprises: the oil circuit system 100 according to the first embodiment of the present invention.

[0122] The powertrain according to the second embodiment of the present invention can improve the efficiency of the powertrain by providing the oil circuit system 100 according to the first embodiment of the present invention.

[0123] A vehicle according to an embodiment of a third aspect of the present invention comprises: the powertrain according to the embodiment of the second aspect of the present invention.

[0124] The vehicle according to the third aspect of the present invention can improve the efficiency of the vehicle by providing the powertrain according to the second aspect of the present invention.

[0125] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0126] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0127] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0128] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0129] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An oil circuit system, characterized in that: include: Oil pan; An oil storage box is communicated with the oil pan to control the oil level in the oil pan.

2. The oil circuit system according to claim 1, characterized in that: Also includes: An oil driving member is connected between the oil storage box and the oil pan, and is used for driving the oil to flow between the oil pan and the oil storage box.

3. The oil circuit system according to claim 1, characterized in that: Also includes: A first control valve is connected between the oil storage box and the oil pan, and the oil storage box is configured to control the oil level in the oil pan through the first control valve.

4. The oil circuit system according to claim 3, characterized in that: Also includes: An oil driving member is connected between the first control valve and the oil pan, and is used for driving the oil to flow between the oil pan and the oil storage box.

5. The oil circuit system according to claim 4, characterized in that: Also includes: An oil supply circuit, the inlet of which is connected to the oil pan, the outlet of which is connected to a plurality of parts to be lubricated and the first control valve, and the oil drive component is connected in series to the oil supply circuit to drive the oil in the oil supply circuit to flow from the inlet to the outlet.

6. The oil circuit system according to claim 5, characterized in that: The oil storage box has an oil storage cavity and a first oil port communicating with the oil storage cavity, and the first control valve is arranged between the first oil port and the oil pan.

7. The oil circuit system according to claim 6, characterized in that: The first control valve includes a first passage and a second passage, and the first control valve has a first state and a second state. In the first state, the first passage is connected between the oil supply circuit and the first oil port so that the oil in the oil supply circuit enters the oil storage chamber through the first oil port. In the second state, the second passage is connected with the first oil port and the oil pan so that the oil in the oil storage chamber enters the oil pan through the first oil port.

8. The oil circuit system according to claim 7, characterized in that: Also includes: A hydraulic oil circuit and a hydraulic drive component, wherein the hydraulic oil circuit is connected to the oil pan, the hydraulic drive component is suitable for driving the oil in the oil pan to flow in the hydraulic oil circuit, and the hydraulic oil circuit is suitable for connecting to the first control valve to drive the first control valve to switch between the first state and the second state through the oil in the hydraulic oil circuit.

9. The oil circuit system according to claim 8, characterized in that: The hydraulic oil circuit includes: a main oil circuit, a first branch circuit and a second branch circuit. One end of the main oil circuit is connected to the oil pan, the first branch circuit and the second branch circuit are both connected to the other end of the main oil circuit, the oil outlet end of the first branch circuit is connected to the first control valve, and the oil outlet end of the second branch circuit is connected to the clutch.

10. The oil circuit system according to claim 9, characterized in that: A second control valve is connected in series to the first branch, and the second control valve is used to control the on-off of the first branch.

11. The oil circuit system according to claim 10, characterized in that: The oil circuit system further includes: a clutch solenoid valve, which is connected in series to the second branch circuit, and is used to control the flow of the second branch circuit.

12. The oil circuit system according to claim 11, characterized in that: The hydraulic oil circuit also includes: a third branch, one end of the third branch is connected to the second branch between the clutch solenoid valve and the clutch, the other end of the third branch is connected to the first control valve, and a first one-way valve is connected in series on the third branch, and the first one-way valve is configured to allow oil to flow in one direction toward the first control valve.

13. The oil circuit system according to claim 11, characterized in that: The hydraulic oil circuit further includes: a third branch, one end of which is connected to the second branch between the clutch solenoid valve and the clutch, and the other end of which is connected to the first control valve. When the second control valve is opened and the first branch is connected, the clutch solenoid valve is opened and the second branch is connected.

14. The oil circuit system according to claim 10, characterized in that: The oil circuit system also includes: a regulating oil circuit, one end of which is connected to the first branch between the second control valve and the first control valve, and the other end of which is connected to the oil supply circuit. A second one-way valve is connected in series on the regulating oil circuit, and the second one-way valve is configured to allow oil to flow in one direction toward the oil supply circuit.

15. The oil circuit system according to any one of claims 8 to 14, characterized in that: The oil storage box also has a second oil port connected to the oil storage cavity. The oil circuit system also includes: a first oil circuit, the first oil circuit is connected between the second oil port and the clutch, a third control valve is connected in series to the first oil circuit, and the oil in the oil storage chamber is suitable for flowing to the clutch through the second oil port and the first oil circuit.

16. The oil circuit system according to claim 15, characterized in that: In the up-down direction, the height of the second oil port is higher than the height of the clutch, and the oil storage box is configured to allow the oil in the oil storage cavity to flow toward the clutch through the second oil port under the action of gravity.

17. The oil circuit system according to claim 15, characterized in that: The first control valve is connected to the first oil passage, and the first control valve further has a third passage. In the second state, the third passage is connected between the oil supply passage and the first oil passage.

18. The oil circuit system according to claim 17, characterized in that: The first control valve comprises: A housing, wherein a housing cavity and a first interface are formed in the housing, and the first interface is connected between the housing cavity and the hydraulic oil circuit; A valve core is movably arranged in the accommodating chamber between a first position and a second position. In the first position, the first control valve is in a second state. In the second position, the first control valve is in a second state. The hydraulic oil circuit is suitable for driving the valve core to move from the first position to the second position.

19. The oil circuit system according to claim 18, characterized in that: The first control valve further includes: a reset member, which is disposed in the accommodating chamber and is configured to always drive the valve core to move from the second position toward the first position.

20. The oil circuit system according to claim 19, characterized in that: The housing is further provided with a second interface, a third interface, a fourth interface and a fifth interface communicating with the accommodating chamber, the second interface communicating with the first oil circuit, the third interface communicating with the first oil port, the fourth interface communicating with the oil supply circuit, and the fifth interface communicating with the oil pan. In the first position, the valve core enables the third interface to communicate with the fourth interface through the accommodating cavity. In the second position, the second interface is communicated with the fourth interface through the accommodating cavity, and the third interface is communicated with the fifth interface through the accommodating cavity.

21. The oil circuit system according to any one of claims 5 to 14, characterized in that: The oil supply circuit includes: a first branch, a second branch and an output oil circuit, the first branch and the second branch are connected in parallel between the output oil circuit and the oil pan, and the oil drive component includes: a first pump and a second pump, the first pump is connected in series to the first branch, and the second pump is connected in series to the second branch.

22. The oil circuit system according to claim 21, characterized in that: Also includes: A hydraulic oil circuit and a hydraulic driving component, wherein the hydraulic oil circuit is connected to the oil pan, the hydraulic driving component is suitable for driving the oil in the oil pan to flow in the hydraulic oil circuit, and the hydraulic driving component and the second pump are integrated into one body.

23. A powertrain, characterized in that: include: The oil circuit system according to any one of claims 1 to 22.

24. A vehicle, characterized in that: include: The powertrain of claim 23.

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