Hydraulic systems, hybrid transmissions, and vehicles

Abstract

This invention provides a hydraulic system, a hybrid transmission, and a vehicle, the hydraulic system comprising a lubrication module, a high-pressure module, and a cooling lubrication module, the lubrication module comprising an electric pump connected to the high-pressure module, the high-pressure module being configured to supply lubrication to the vehicle's actuators via the electric pump, and the cooling lubrication module comprising a first on / off valve being used to cool and lubricate the vehicle's cooling components, the first on / off valve being installed between the electric pump and the cooling components, and the first on / off valve being configured to open and close according to the vehicle's operating mode. This configuration allows for adaptation to the oil volume needs of the high-pressure module and the cooling lubrication module at different vehicle speeds or different modes, allows for supplying lubrication to the vehicle's actuators via the electric pump, and also allows for supplementing the cooling lubrication module with the flow rate of the high-pressure module via the electric pump, significantly improving the operational efficiency of the hydraulic system.

Description

Technical Field

[0001] This application relates to the technical field of automotive gearboxes, and particularly to hydraulic systems, hybrid transmissions, and vehicles.

Background Art

[0002] With the development of science and technology and the improvement of people's concept of environmental protection, new energy vehicle models are widely applied. Among new energy vehicle models, hybrid vehicle models are increasingly approved by more users because of their high efficiency, low fuel consumption rate, and long cruising range.

[0003] For hybrid vehicle models, an efficient hybrid power train is the core competitiveness. In a hybrid power train, a dedicated hybrid transmission is an important component, and its working efficiency is one of the important factors affecting the fuel consumption rate of the whole vehicle. The hydraulic system is an important factor affecting the efficiency of the hybrid transmission.

[0004] The hydraulic system of a conventional hybrid transmission is not sufficiently reasonable in the design of its cooling lubrication oil circuit and high-pressure oil circuit. Therefore, the oil pump operates excessively, making it difficult to adapt to the needs of the operating oil volume at different vehicle speeds or modes, increasing energy consumption, and affecting the efficiency of the hydraulic system.

Summary of the Invention

[0005] In view of these, this application provides a hydraulic system, a hybrid transmission, and a vehicle that can improve the efficiency of the hydraulic system.

[0006] Specifically, it includes the following technical solutions.

[0007] In a first aspect, an embodiment of this application provides a hybrid transmission including a hydraulic system including an oil supply module, a high-pressure module, and a cooling lubrication module. The oil supply module includes an electric pump connected to the high-pressure module. The high-pressure module is configured to supply lubrication to the vehicle's actuators via the electric pump, and the cooling and lubrication module, including a first on / off valve, is used to cool and lubricate the vehicle's cooling components, the first on / off valve is installed between the electric pump and the cooling components, and the first on / off valve is configured to open and close according to the vehicle's operating mode.

[0008] In some embodiments, the lubrication module further includes a mechanical pump connected to the cooling lubrication module and arranged to operate in conjunction with the wheels or drive motors of the vehicle.

[0009] In some embodiments, the cooling and lubrication module further includes a second on / off valve, an oil cooler, and a temperature sensing member, wherein the second on / off valve and the oil cooler are installed in parallel between the mechanical pump and the member to be cooled, the temperature sensing member is installed at the output terminal of the oil cooler and the output terminal of the second on / off valve, and the second on / off valve is opened and closed according to the oil temperature detected by the temperature sensing member.

[0010] In some embodiments, the refueling module further includes an oil tank, and the electric pump and the mechanical pump are connected to the oil tank, respectively. The cooling and lubrication module further includes a relief valve, the input terminal of which is connected to the input terminal of the second on / off valve, and the output terminal of which is connected to one end of the mechanical pump that is close to the oil tank.

[0011] In some embodiments, the cooling and lubrication module further includes a flow control valve, the input terminal of which is connected to the output terminal of the first on / off valve, the output terminal of the oil cooler, and the output terminal of the second on / off valve, respectively, and the output terminal of which is connected to the member to be cooled.

[0012] In some embodiments, the high-pressure module includes a control valve, the input terminal of which is connected to the electric pump, and the output terminal of which is connected to the actuator.

[0013] In some embodiments, the high-pressure module further includes a connected accumulator and a pressure sensing member, both of which are located between the control valve and the electric pump, and the accumulator is configured to fill with oil to store energy or to supply oil to the control valve in response to the pressure detected by the pressure sensing member.

[0014] In some embodiments, the high-pressure module further includes a safety valve installed between the electric pump and the first on / off valve and located upstream of the control valve.

[0015] In a second aspect, an embodiment of the present application provides a hybrid transmission that includes a hydraulic system provided by any one embodiment of the first aspect.

[0016] In a third aspect, an embodiment of the present application provides a vehicle including a hybrid transmission provided in an embodiment of the second aspect.

[0017] In some embodiments, the above vehicle is A purely electric drive mode, in which the first on / off valve is opened, Reverse mode, in the above reverse mode, the first on / off valve is opened, The system has one or more operating modes, namely a hybrid mode, in which the first on / off valve is closed.

[0018] The beneficial effects of the technology provided by the embodiments of the present invention include, by installing at least a first on / off valve between the electric pump and the component to be cooled, the first on / off valve can be opened and closed according to the vehicle's operating mode, thereby adapting to the oil volume needs of the high-pressure module and the cooling lubrication module at different vehicle speeds or different modes, allowing for independent lubrication of the vehicle's actuators via the electric pump, and also allowing the flow rate of the high-pressure module to be replenished to the cooling lubrication module via the electric pump, effectively controlling the allocation of flow rates to the high-pressure module and the cooling lubrication module by the electric pump, enabling more flexible control of the hydraulic system, and significantly improving the operational efficiency of the hydraulic system. [Brief explanation of the drawing]

[0019] To further clarify the technical concept in the embodiments of the present application, the necessary drawings used in the embodiments are briefly introduced below. Clearly, the drawings in the following description represent only a few embodiments of the present application, and those skilled in the art can obtain further drawings based on these without any creative effort.

[0020] [Figure 1] This is a schematic diagram of the structure of the hydraulic system provided by the embodiment of the present application. [Figure 2] This is a schematic diagram illustrating the principle of hydraulics in the purely electric drive mode of the hydraulic system provided by the embodiment of the present application. [Figure 3] This is a schematic diagram illustrating the hydraulic principle when an electric pump supplies oil to a shift mechanism in the purely electric drive mode of the hydraulic system provided by the embodiment of the present invention. [Figure 4] This is a schematic diagram illustrating the principle of hydraulics in reverse mode of the hydraulic system provided by the embodiment of the present invention. [Figure 5] This is a schematic diagram illustrating the hydraulic principle in hybrid mode of the hydraulic system provided by the embodiment of the present invention.

[0021] The above drawings show clear embodiments of the present application, which will be described in more detail below. These drawings and the description of the characters are not intended to limit the scope of the concept of the present application in any way, but to explain the concept of the present application to those skilled in the art by referring to specific embodiments.

Embodiments for Carrying out the Invention

[0022] Hereinafter, in accordance with the drawings in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained on the premise that those skilled in the art do not perform creative labor belong to the protection scope of the present application.

[0023] The directional nouns such as "upper", "lower", "side", etc. in the embodiments of the present application generally refer to the relative relationship of the directions shown in FIG. 1, and the adoption of these directional nouns is only for more clearly explaining the relationship between structures and not for explaining absolute directions. When the product is arranged in different postures, the direction may change. For example, "upper" and "lower" may be interchanged.

[0024] Unless otherwise defined, all technical terms used in the embodiments of the present application have the same meaning as generally understood by those skilled in the art. Hereinafter, some technical terms in the embodiments of the present application will be explained.

[0025] In order to make the technical solutions and advantages of the present application clearer, hereinafter, the embodiments of the present application will be further described in more detail in combination with the drawings.

[0026] As shown in FIG. 1, the embodiment of the present application is applied to a hybrid transmission and provides a hydraulic system including an oil supply module 1, a high-pressure module 2, and a cooling and lubrication module 3.

[0027] The oil supply module 1 includes an electric pump 11 connected to the high-pressure module 2.

[0028] The high-pressure module 2 is configured to supply lubrication to the vehicle's actuator 100 via an electric pump 11, and the cooling and lubrication module 3, which includes a first on / off valve 31, is used to cool and lubricate the vehicle's cooling target components (not shown), the first on / off valve 31 is installed between the electric pump 11 and the cooling target components, and the first on / off valve 31 is configured to open and close according to the vehicle's operating mode.

[0029] For example, the vehicle's actuators 100 include a clutch 101, a shift mechanism 102, etc., and the electric pump 11, equipped with a motor, can supply oil to the actuators 100, allowing the actuators 100 to operate normally.

[0030] The first on / off valve 31 is openable and closable. When the first on / off valve 31 is open, the electric pump 11 communicates with the component to be cooled and transports oil to the component to cool and lubricate it. When the first on / off valve 31 is closed, the electric pump 11 is disconnected from the component to be cooled.

[0031] For example, if the cooling and lubrication module 3 is equipped with a drive member, and the first on / off valve 31 is closed, and it is necessary to cool and lubricate the component to be cooled, the cooling and lubrication module 3 transports oil to the component to be cooled via the drive member.

[0032] For example, the vehicle's driving modes include one or more of the pure electric drive mode, reverse mode, and hybrid mode, and in different driving modes, the first on / off valve 31 can perform different operations, thereby selectively lubricating the cooling lubrication module 3.

[0033] The hydraulic system provided by the embodiment of the present invention, by installing a first on / off valve 31 between the electric pump 11 and the component to be cooled, can open and close the first on / off valve 31 according to the vehicle's operating mode, thereby adapting to the oil volume needs of the high-pressure module 2 and the cooling lubrication module 3 at different vehicle speeds or in different modes. It can also independently supply oil to the vehicle's actuator 100 via the electric pump 11, and can also replenish the flow rate of the high-pressure module 2 to the cooling lubrication module 3 via the electric pump 11. This effectively controls the allocation of flow rates to the high-pressure module 2 and the cooling lubrication module 3 by the electric pump 11, allowing for more flexible control of the hydraulic system and significantly improving the operational efficiency of the hydraulic system.

[0034] In one specific embodiment, the lubrication module 1 further includes a mechanical pump 12 connected to the cooling lubrication module 3 and arranged to operate in conjunction with the vehicle's wheels or drive motor.

[0035] For example, the mechanical pump 12 and the wheels / drive motor are connected by means of coaxial direct drive, gear drive, sprocket chain drive, etc. When the vehicle moves forward, the mechanical pump 12 rotates forward to supply oil to the cooling lubrication module 3, and when the vehicle moves backward, the mechanical pump 12 rotates backward to draw up the oil.

[0036] As shown in Figure 1, the mechanical pump 12 is installed in parallel with the electric pump 11, and the oil can be transported to the cooling target component via the mechanical pump 12. To be understood, "the mechanical pump 12 and the electric pump 11 are installed in parallel" means that the input terminals of both the mechanical pump 12 and the electric pump 11 are connected to the oil tank 13, where the input terminal of the mechanical pump 12 is the input terminal when the mechanical pump 12 is rotating in the forward direction.

[0037] Exemplary, as shown in Figure 2, in purely electric drive mode, the drive motor drives the vehicle, the mechanical pump 12 begins supplying oil, and the first on / off valve 31 opens, pressurizing the oil fluid to the cooling target component by the electric pump 11, which is advantageous in reducing the load on the cooling lubrication module 3 of the drive motor and improving the working efficiency of the hydraulic system. In this mode, if the vehicle has a gear shift need, as shown in Figure 3, the first on / off valve 31 is temporarily closed, allowing the electric pump 11 to supply oil fluid to the shift mechanism 102, and after the shift is completed, the first on / off valve 31 is opened, and the electric pump 11 continues to supply oil fluid to the cooling lubrication module 3.

[0038] As an example, as shown in Figure 4, in reverse mode, the wheels rotate in reverse, the mechanical pump 12 does not transport oil to the component to be cooled, the first on / off valve 31 opens, and oil is pressurized and sent to the component to be cooled by the electric pump 11 to cool and lubricate the component.

[0039] Exemplary, as shown in Figure 5, in hybrid mode, the vehicle's engine is in a driving or power generation operation state, and the hydraulic system needs to continuously supply high-pressure oil to provide hydraulic clamping force to actuators 100 such as clutch 101. At this time, the first on / off valve 31 is closed, the electric pump 11 supplies oil to actuators 100, and the cooling lubrication module 3 cools and lubricates the components to be cooled by outputting oil via the mechanical pump 12.

[0040] In one specific embodiment, the cooling and lubrication module 3 further includes a second on / off valve 32, an oil cooler 33, and a temperature sensing member 34, wherein the second on / off valve 32 and the oil cooler 33 are installed in parallel between the mechanical pump 12 and the member to be cooled, and the temperature sensing member 34 is installed at the output terminal of the oil cooler 33 and the output terminal of the second on / off valve 32, and the second on / off valve 32 is opened and closed according to the oil temperature detected by the temperature sensing member 34. To be understood, "connecting the second on / off valve 32 and the oil cooler 33 in parallel" means that both the input terminal of the second on / off valve 32 and the input terminal of the oil cooler 33 are connected to the mechanical pump 12, and both the output terminal of the second on / off valve 32 and the output terminal of the oil cooler 33 are connected to the member to be cooled.

[0041] The oil cooler 33 is used to cool the oil, and the temperature sensing member 34 is used to detect the oil temperature.

[0042] For example, if the oil temperature is below a preset oil temperature, the oil temperature of the cooling lubrication module 3 is relatively low. In this case, the second on / off valve 32 is opened, and the oil does not pass through the oil cooler 33, or only a very small amount of oil passes through the oil cooler 33. This causes the oil temperature to rise rapidly, improving the working efficiency of the hybrid transmission. If the oil temperature is higher than the preset oil temperature, the vehicle's driving load is relatively high, and the oil temperature is relatively high. In this case, the second on / off valve 32 is closed, and the oil is cooled by the oil cooler 33. After cooling, the components to be cooled are cooled and lubricated, preventing overheating of the components to be cooled from affecting their performance.

[0043] Selectively, the second on / off valve 32 is communicatively connected to a temperature sensing member 34. If the oil temperature is higher than a preset oil temperature, the temperature sensing member 34 transmits a first signal to the second on / off valve 32, which is shut off upon receiving the first signal. If the oil temperature is below a preset oil temperature, the temperature sensing member 34 transmits a second signal to the second on / off valve 32, which is opened upon receiving the second signal.

[0044] Selectively, the second on / off valve 32 and the temperature sensing member 34 are connected to the vehicle's control module in a communicative manner. The temperature sensing member 34 transmits a third signal to the second on / off valve 32 if the oil temperature is higher than a preset oil temperature. Upon receiving the third signal, the control module transmits a fourth signal to the second on / off valve 32, which is then shut off. The temperature sensing member 34 transmits a fifth signal to the control module if the oil temperature is below a preset oil temperature. Upon receiving the fifth signal, the control module transmits a sixth signal to the second on / off valve 32, which is then opened.

[0045] In a further embodiment, the lubrication module 1 further includes an oil tank 13, an electric pump 11 and a mechanical pump 12 are connected to the oil tank 13, and the cooling lubrication module 3 further includes a relief valve 36, the input terminal of which is connected to the input terminal of a second on / off valve 32, and the output terminal of which is connected to one end of the mechanical pump 12 that is closer to the oil tank 13.

[0046] As shown in Figure 1, the refueling module 1 further includes a first filter 14, and the oil tank 13 and the first filter 14 are located upstream of the electric pump 11 and the mechanical pump 12, and the first filter 14 is located at the upstream end of the electric pump 11 and the mechanical pump 12 and is used to filter the oil flowing out of the oil tank 13, providing clean oil to the high-pressure module 2 and the cooling lubrication module 3.

[0047] The relief valve 36 has the function of pressure regulation and pressure stabilization. As shown in Figure 1, the first end of the relief valve 36 is connected to the input terminals of the second on / off valve 32 and the oil cooler 33, and the second end of the relief valve 36 is connected between the mechanical valve and the first filter 14. The direction of conduction of the relief valve 36 is from the first end to the second end.

[0048] When the vehicle speed is relatively high and the cooling and lubrication needs reach their maximum, the excess oil from the cooling and lubrication module 3 is returned to the mechanical pump 12 or oil tank 13 via the relief valve 36, stabilizing the oil pressure in the cooling and lubrication module 3 while simultaneously improving the utilization rate of the oil.

[0049] Specifically, the cooling and lubrication system further includes a first check valve 37, a second check valve 16, and a sub-tank 15.

[0050] As shown in Figure 1, the first check valve 37 is connected between the second on / off valve 32 and the mechanical pump 12 (and also between the oil cooler 33 and the mechanical pump 12, and between the first end of the relief valve 36 and the mechanical pump 12), and the direction of conduction of the first check valve 37 is from the mechanical pump 12 to the second on / off valve 32, the oil cooler 33, and the relief valve 36.

[0051] The first end of the second check valve 16 is connected between the mechanical pump 12 and the first check valve 37, and the second end is connected to the sub-tank 15. The direction of conduction of the second check valve 16 is from the second end to the first end. When the vehicle moves forward, the mechanical pump 12 rotates forward, the first check valve 37 is open, and the second check valve 16 is closed, and the oil flows from the mechanical pump 12 through the second on / off valve 32 or the oil cooler 33 to the component to be cooled. When the vehicle moves backward, the mechanical pump 12 rotates backward, the first check valve 37 is closed, and the second check valve 16 is open, and the mechanical pump 12 pumps oil from the sub-tank 15 for subsequent use.

[0052] The cooling and lubrication module 3 further includes a flow control valve 35, the input terminal of which is connected to the output terminal of the first on / off valve 31, the output terminal of the oil cooler 33, and the output terminal of the second on / off valve 32, respectively, and the output terminal of which is connected to the member to be cooled.

[0053] The output terminals of the first on / off valve 31, the second on / off valve 32, and the oil cooler 33 are all connected to the flow control valve 35, and the oil flowing out from the electric pump 11 and the mechanical pump 12 flows to the cooling target component via the flow control valve 35.

[0054] The flow control valve 35 can allocate flow rates to different components to be cooled, thereby ensuring sufficient cooling and lubrication for each component.

[0055] In one specific embodiment, the high-pressure module 2 includes a control valve 27, the input terminal of which is connected to the electric pump 11, and the output terminal of which is connected to the actuator 100.

[0056] For example, the control valve 27 is an electromagnetic valve and is openable and closable. When the actuator 100 is operating, the control valve 27 is open and the oil fluid output from the electric pump 11 can flow to the actuator 100 through the control valve 27. When the control valve 27 is not operating, the control valve 27 is closed and the oil fluid output from the electric pump 11 cannot flow to the actuator 100.

[0057] Specifically, each control valve 27 corresponds to one actuator 100, and as shown in Figure 1, the actuator 100 includes a parallel-mounted shift mechanism 102 and three clutches 101, and there are four control valves 27, each corresponding one-to-one with either a clutch 101 or a shift mechanism 102.

[0058] In this embodiment, by installing the control valve 27, precise control of the oil in the high-pressure module 2 can be achieved, transporting the oil according to the needs of the actuator 100 and improving the operational efficiency of the hybrid transmission.

[0059] In one further embodiment, the high-pressure module 2 further includes a connected accumulator 25 and a pressure sensing member 26, both of which are located between a control valve 27 and an electric pump 11, and the accumulator 25 is arranged to fill with oil to store energy or to supply oil to the control valve 27 in response to the pressure detected by the pressure sensing member 26.

[0060] The accumulator 25 is used to store hydraulic energy in the hydraulic system and, when in operation, releases hydraulic energy to the actuator 100 so that the actuator 100 can obtain oil. That is, the actuator 100 may directly obtain oil from the electric pump 11, or the electric pump 11 may not output oil to the actuator 100, and the actuator 100 may directly obtain oil from the accumulator 25.

[0061] The pressure sensing member 26 is used to detect the hydraulic pressure upstream of the control valve 27. If the hydraulic pressure is greater than or equal to the required hydraulic pressure of the actuator 100, the accumulator 25 can supply oil to the actuator 100. If the hydraulic pressure is less than the required hydraulic pressure of the actuator 100, the electric pump 11 directly supplies oil to the actuator 100, and any excess oil is stored in the accumulator 25.

[0062] Selectively, the high-pressure module 2 further includes a third check valve 21 and a fourth check valve 24 connected in series downstream of the electric pump 11, and the input terminal of the first on / off valve 31 is connected between the third check valve 21 and the fourth check valve 24. The direction of conduction of both the third check valve 21 and the fourth check valve 24 is from the electric pump 11 to the actuator 100, the third check valve 21 is used to ensure that the oil output from the electric pump 11 flows to the first on / off valve 31, the accumulator 25 and the actuator 100, and the fourth check valve 24 is used to ensure that the oil output from the electric pump 11 flows to the accumulator 25 and the actuator 100.

[0063] Selectively, the high-pressure module 2 further includes a second filter 22 connected between a third check valve 21 and a fourth check valve 24, the second filter 22 being used to filter and purify the oil liquid output from the electric pump 11, thereby making the oil liquid flowing to the actuator 100 and the components to be cooled relatively clean.

[0064] In one further embodiment, the high-pressure module 2 further includes a safety valve 23 installed between the electric pump 11 and the first on / off valve 31 and located upstream of the control valve 27.

[0065] The safety valve 23 is used to limit the highest hydraulic pressure in the high-pressure module 2 and to protect the safety of the high-pressure module 2 and the cooling and lubrication module 3.

[0066] In one specific embodiment, the operational flow in different modes of the hydraulic system provided by the embodiment of the present application includes the following:

[0067] (1) In pure electric drive mode, the drive motor drives the vehicle's movement, the hydraulic system has no need to transmit power, the high-pressure module 2 does not operate, and the hybrid transmission only has cooling and lubrication needs.

[0068] At this time, as shown in Figure 2, the oil in the oil tank 13 flows through the first filter 14 to the electric pump 11 and the mechanical pump 12, and the oil liquid output from the electric pump 11 flows sequentially through the third check valve 21, the second filter 22, the first on / off valve 31, and the flow control valve 35 to reach the component to be cooled.

[0069] At the same time, when the mechanical pump 12 is rotating in the forward direction and the temperature sensing member 34 detects that the oil temperature is relatively low, the second on / off valve 32 is opened and the first check valve 37 is opened, and the oil in the oil tank 13 flows through the first filter 14 to the mechanical pump 12, and is output downstream by the mechanical pump 12, flowing sequentially through the first check valve 37, the second on / off valve 32 and the flow control valve 35 to reach the component to be cooled, cooling and lubricating the component, and any excess oil output from the mechanical pump 12 returns to the mechanical valve via the relief valve 36.

[0070] When the temperature detection member 34 detects that the oil temperature is relatively high, the second on / off valve 32 is opened and the first check valve 37 is opened, and the oil liquid output from the mechanical pump 12 flows sequentially through the first check valve 37, the oil cooler 33, and the flow control valve 35 to reach the component to be cooled.

[0071] In this mode, if the vehicle has a need for a gear shift, as shown in Figure 3, the first on / off valve 31 is temporarily closed, the control valve 27 connected to the shift mechanism 102 is opened, and the oil output from the electric pump 11 flows sequentially through the third check valve 21, the second filter 22, the fourth check valve 24, the accumulator 25, and the control valve 27 to reach the shift mechanism 102. After the shift is completed, the first on / off valve 31 is opened, and the electric pump 11 continues to supply oil to the cooling lubrication module 3. Alternatively, if the vehicle has a need for a gear shift and oil is stored in the accumulator 25, and the hydraulic pressure detected by the pressure sensing member 26 is higher than the hydraulic pressure needs of the shift mechanism 102, the electric pump 11 does not operate, and the shift mechanism 102 is lubricated by the accumulator 25.

[0072] (ii) In reverse mode, the wheels rotate in reverse, and as shown in Figure 4, the mechanical pump 12 does not transport oil to the cooling target member. The first on / off valve 31 opens, and the oil output from the electric pump 11 flows sequentially through the third check valve 21, the second filter 22, the first on / off valve 31, and the flow control valve 35 to reach the cooling target member.

[0073] Simultaneously, the mechanical pump 12 rotates in reverse, the first check valve 37 is shut off, the second check valve 16 is opened, and the mechanical pump 12 draws up oil from the sub-tank 15 for subsequent use.

[0074] (iii) In hybrid mode, the hybrid transmission has a need for high-pressure fluid, and the hydraulic system continuously supplies high-pressure fluid.

[0075] Specifically, when the vehicle's engine is in a driving or power generation operation state, the hydraulic system needs to supply high-pressure oil to continuously provide hydraulic clamping force to actuators 100 such as the clutch 101. At this time, as shown in Figure 5, the first on / off valve 31 is closed, and the oil output from the electric pump 11 flows sequentially through the third check valve 21, the second filter 22, the fourth check valve 24, the accumulator 25, and the control valve 27 to reach the shift mechanism 102.

[0076] Simultaneously, the cooling and lubrication module 3 outputs oil via the mechanical pump 12 to cool and lubricate the component to be cooled. When the mechanical pump 12 is rotating forward and the temperature detection member 34 detects that the oil temperature is relatively low, the second on / off valve 32 opens and the first check valve 37 becomes conductive, and the oil in the oil tank 13 flows through the first filter 14 to the mechanical pump 12, and is output downstream by the mechanical pump 12, flowing sequentially through the first check valve 37, the second on / off valve 32 and the flow control valve 35 to reach the component to be cooled, cooling and lubricating the component, and any excess oil output from the mechanical pump 12 returns to the mechanical valve via the relief valve 36. When the temperature detection member 34 detects that the oil temperature is relatively high, the second on / off valve 32 is opened and the first check valve 37 is opened, and the oil liquid output from the mechanical pump 12 flows sequentially through the first check valve 37, the oil cooler 33, and the flow control valve 35 to reach the component to be cooled.

[0077] Embodiments of the present invention further provide a hybrid transmission including a hydraulic system provided by any one of the embodiments described above.

[0078] Embodiments of the present invention further provide a vehicle including a hybrid transmission provided by any one of the embodiments described above.

[0079] Specifically, the vehicle is a hybrid model.

[0080] In a further embodiment, the vehicle is A purely electric drive mode, in which the first on / off valve 31 is opened, In reverse mode, in reverse mode, the first on / off valve 31 is opened, The system has one or more operating modes, namely a hybrid mode in which the first on / off valve 31 is closed.

[0081] In this embodiment, the first on / off valve 31 can perform different operations in different operating modes, thereby selectively supplying lubrication to the cooling lubrication module 3.

[0082] Exemplary, as shown in Figure 2, in purely electric drive mode, the drive motor drives the vehicle, the cooling and lubrication module 3 begins supplying oil to the component to be cooled, and the first on / off valve 31 opens, pressurizing the oil fluid to the component to be cooled by the electric pump 11, which is advantageous in reducing the load on the cooling and lubrication module 3 of the drive motor and improving the working efficiency of the hydraulic system. In this mode, if the vehicle has a need for gear shifting, as shown in Figure 3, the first on / off valve 31 is temporarily closed, allowing the electric pump 11 to supply oil fluid to the shift mechanism 102, and after the shift is completed, the first on / off valve 31 is opened, and the electric pump 11 continues to supply oil fluid to the cooling and lubrication module 3.

[0083] As an example, as shown in Figure 4, in reverse mode, the wheels rotate in reverse, the cooling and lubrication module 3 does not transport oil to the component to be cooled, the first on / off valve 31 opens, and oil is pumped to the component to be cooled by the electric pump 11 to cool and lubricate the object.

[0084] For example, as shown in Figure 5, in hybrid mode, when the vehicle's engine is operating in a driving or power generation state, the hydraulic system needs to continuously supply high-pressure oil to the actuator 100, such as the clutch 101, to provide hydraulic clamping force. At this time, the first on / off valve 31 is closed, the electric pump 11 supplies oil to the actuator 100, and the cooling lubrication module 3 outputs oil to the component to be cooled, thereby cooling and lubricating the component.

[0085] In this application, the terms "first" and "second" are merely for the purpose of describing the objective and should not be understood as indicating or implying relative importance. The term "plural" refers to two or more unless otherwise specified.

[0086] Other embodiments of the Application will be readily conceivable to those skilled in the art after taking this Specification into consideration and after practicing the Application disclosed herein. This Application is intended to cover any variations, uses, or adaptable changes of the Application, including common or conventional technical means known in the art that are in accordance with the general principles of the Application and not disclosed herein. This Specification and Examples are to be considered merely illustrative.

[0087] It should be understood that this application is not limited to the exact structure described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of this application is limited only by the attached claims.

[0088] This application claims priority to the Chinese patent application filed on December 20, 2023, with application number 202311767646.8 and title "Hydraulic System, Hybrid Transmission and Vehicle," the entirety of which is incorporated into this disclosure by reference. [Explanation of symbols]

[0089] 1- Fueling module, 11- Electric pump, 12- Mechanical pump, 13- Oil tank, 14- First filter, 15- Sub-tank, 16- Second check valve, 2-High-pressure module, 21-Third check valve, 22-Second filter, 23-Safety valve, 24-Fourth check valve, 25-Accumulator, 26-Pressure sensing member, 27-Control valve, 3-Cooling and lubrication module, 31-First on / off valve, 32-Second on / off valve, 33-Oil cooler, 34-Temperature sensing element, 35-Flow control valve, 36-Relief valve, 37-First check valve, 100 - Actuator, 101 - Clutch, 102 - Shift mechanism

Claims

1. A hydraulic system applied to a hybrid transmission, the hydraulic system includes a lubrication module (1), a high-pressure module (2), and a cooling lubrication module (3), The refueling module (1) includes an electric pump (11) connected to the high-pressure module (2), The high-pressure module (2) is arranged to supply lubrication to the vehicle's actuator (100) via the electric pump (11), and the cooling and lubrication module (3), which includes a first on / off valve (31), is used to cool and lubricate the vehicle's cooling target components, the first on / off valve (31) is installed between the electric pump (11) and the cooling target components, and the first on / off valve (31) is arranged to open and close according to the vehicle's operating mode. Hydraulic system.

2. The lubrication module (1) further includes a mechanical pump (12) connected to the cooling lubrication module (3) and arranged to operate in conjunction with the wheels or drive motor of the vehicle. The hydraulic system according to claim 1.

3. The cooling lubrication module (3) further includes a second on / off valve (32), an oil cooler (33), and a temperature sensing member (34), wherein the second on / off valve (32) and the oil cooler (33) are installed in parallel between the mechanical pump (12) and the member to be cooled, the temperature sensing member (34) is installed at the output terminal of the oil cooler (33) and the output terminal of the second on / off valve (32), and the second on / off valve (32) is opened and closed according to the oil temperature detected by the temperature sensing member (34). The hydraulic system according to claim 2.

4. The refueling module (1) further includes an oil tank (13), and the electric pump (11) and the mechanical pump (12) are connected to the oil tank (13), respectively. The cooling lubrication module (3) further includes a relief valve (36), the input terminal of which is connected to the input terminal of the second on / off valve (32), and the output terminal of which is connected to one end of the mechanical pump (12) that is close to the oil tank (13). The hydraulic system according to claim 3.

5. The cooling lubrication module (3) further includes a flow control valve (35), the input terminal of which is connected to the output terminal of the first on / off valve (31), the output terminal of the oil cooler (33), and the output terminal of the second on / off valve (32), respectively, and the output terminal of which is connected to the member to be cooled. The hydraulic system according to claim 3 or 4.

6. The high-pressure module (2) includes a control valve (27), the input terminal of which is connected to the electric pump (11), and the output terminal of which is connected to the actuator (100). A hydraulic system according to any one of claims 1 to 5.

7. The high-pressure module (2) further includes a connected accumulator (25) and a pressure sensing member (26), both of which are located between the control valve (27) and the electric pump (11), and the accumulator (25) is arranged to fill with oil to store energy or to supply oil to the control valve (27) in accordance with the pressure detected by the pressure sensing member (26). The hydraulic system according to claim 6.

8. A hydraulic system comprising the one described in any one of claims 1 to 7, Hybrid transmission.

9. Including the hybrid transmission described in claim 8, vehicle.

10. The aforementioned vehicle is A purely electric drive mode, in which the first on / off valve (31) is opened, In reverse mode, in the reverse mode, the first on / off valve (31) is opened, A hybrid mode, in which the first on / off valve (31) is closed, has one or more operating modes, The vehicle according to claim 9.

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