Hydraulic system and vehicle

Abstract

The utility model discloses a hydraulic system and a vehicle, the hydraulic system comprises: a reversing solenoid valve, the reversing solenoid valve comprises an oil suction port, a first oil outlet and a second oil outlet; the mechanical pump comprises a first oil port and a second oil port, and the first oil port is communicated with the second oil port; when the mechanical pump rotates forwards, the oil suction port is communicated with the first oil outlet, the first oil outlet is communicated with the first oil port, and oil flows to the second oil port through the first oil port. When the mechanical pump rotates reversely, the oil suction port is communicated with the second oil outlet, the second oil outlet is communicated with the second oil port, and oil flows to the first oil port through the second oil port. According to the hydraulic system, the reversing electromagnetic valve is communicated with the mechanical pump, the oil pump can suck oil into the cooling and lubricating system from the oil pool no matter whether the mechanical pump rotates forwards or reversely, no extra oil source needs to be introduced, and cost waste is avoided.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a hydraulic system and a vehicle. Background Technology

[0002] Currently, most dual-motor hybrid transmissions with clutch direct drive on the market have two oil pumps. One is a mechanical pump that supplies oil to the clutch high-pressure control system. After the high-pressure oil supply satisfies the clutch drive, any excess oil enters the cooling and lubrication system. The other is an electronic pump that supplies oil to the cooling and lubrication system. As described in Chinese Patent Publication No. CN213479137U, the oil supplied by the electronic pump and the oil overflowing from the clutch control high-pressure system passes through an oil cooler before being distributed to various cooling and lubrication components for cooling and lubrication. The mechanical pump is usually powered by the engine or wheel end. While the mechanical oil pump coupled to the wheel end meets the requirements for forward driving, when the vehicle reverses, the rotation direction of the mechanical pump changes, and the oil suction and discharge direction changes. The pump cannot draw oil from the hybrid transmission oil sump into the hybrid transmission cooling and lubrication hydraulic system, requiring the introduction of an additional oil source such as an electronic pump, resulting in wasted costs. Utility Model Content

[0003] The purpose of this invention is to provide a hydraulic system and a vehicle that can supply oil to the cooling and lubrication system when the vehicle is moving forward or reversing.

[0004] In a first aspect, this utility model provides a hydraulic system, comprising:

[0005] A reversing solenoid valve, the reversing solenoid valve including an oil suction port, a first oil outlet port and a second oil outlet port;

[0006] A mechanical pump, the mechanical pump including a first oil port and a second oil port, the first oil port and the second oil port being connected to each other;

[0007] in:

[0008] When the mechanical pump rotates forward, the oil suction port is connected to the first oil outlet port, and the first oil outlet port is connected to the first oil port port. The oil flows from the first oil port port to the second oil port port.

[0009] When the mechanical pump reverses, the oil suction port is connected to the second oil outlet, and the second oil outlet is connected to the second oil port, and the oil flows from the second oil port to the first oil port.

[0010] In the hydraulic system described above, preferably, the hydraulic system is connected to the clutch oil circuit, and the oil flowing out from the second oil port when the mechanical pump rotates forward, and the oil flowing out from the first oil port when the mechanical pump rotates in reverse, both flow to the clutch oil circuit.

[0011] In the hydraulic system described above, preferably, a first check valve is provided on the connecting pipeline between the first oil port and the clutch oil circuit.

[0012] In the hydraulic system described above, preferably, a second check valve is provided on the connecting pipeline between the second oil port and the clutch oil circuit.

[0013] In the hydraulic system described above, preferably, the hydraulic system is connected to a cooling and lubrication system to supply oil to the cooling and lubrication system, and the oil flowing out from the second oil port when the mechanical pump rotates forward, and the oil flowing out from the first oil port when the mechanical pump rotates in reverse, can both flow to the cooling and lubrication system.

[0014] In the hydraulic system described above, preferably, the clutch and the cooling and lubrication system are arranged in parallel.

[0015] In the hydraulic system described above, preferably, a control element is provided on the connecting pipeline between the first oil port and the second oil port and the cooling and lubrication system, the control element being used to control the flow of oil to the cooling and lubrication system.

[0016] In the hydraulic system described above, preferably, the control element is a relief valve.

[0017] In the hydraulic system described above, preferably, the hydraulic system further includes an oil suction filter, the inlet end of which is connected to an oil sump, and the outlet end of which is connected to the oil suction port.

[0018] Secondly, this utility model provides a vehicle including the aforementioned hydraulic system.

[0019] Compared with the prior art, the hydraulic system of this utility model utilizes a reversing solenoid valve connected to a mechanical pump. When the mechanical pump rotates forward, the oil inlet of the reversing solenoid valve is connected to the first oil outlet, allowing the oil to flow from the first oil outlet of the mechanical pump to the second oil outlet and then to the clutch oil circuit and the cooling and lubrication system. When the mechanical pump rotates in reverse, the oil inlet of the reversing solenoid valve is connected to the second oil outlet, allowing the oil to flow from the second oil outlet of the mechanical pump to the first oil outlet and then to the clutch oil circuit and the cooling and lubrication system. Thus, regardless of whether the mechanical pump rotates forward or reverse, the oil pump can draw oil from the oil sump into the cooling and lubrication system without the need to introduce an additional oil source, avoiding cost waste. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the hydraulic system for a vehicle moving forward, provided in an embodiment of this utility model.

[0021] Figure 2This is a schematic diagram of the hydraulic system for reversing a vehicle, provided in an embodiment of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 10-Hydraulic system, 20-Clutch oil circuit, 30-Cooling and lubrication system;

[0024] 1-Reversing solenoid valve, 11-Suction port, 12-First oil outlet, 13-Second oil outlet, 2-Mechanical pump, 21-First oil port, 22-Second oil port, 3-First check valve, 4-Second check valve, 5-Relief valve, 6-Suction filter. Detailed Implementation

[0025] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] Firstly, referring to Figure 1 and Figure 2 As shown, this utility model provides a hydraulic system 10, including a reversing solenoid valve 1 and a mechanical pump 2, wherein:

[0027] The reversing solenoid valve 1 includes an oil inlet 11, a first oil outlet 12, and a second oil outlet 13.

[0028] The mechanical pump 2 includes a first oil port 21 and a second oil port 22, which are interconnected.

[0029] Reference Figure 1 As shown, when the vehicle moves forward, the mechanical pump 2 rotates forward under the drive of the wheels, and the reversing solenoid valve 1 is energized, so that the oil suction port 11 is connected to the first oil outlet 12, and the first oil outlet 12 is connected to the first oil port 21. The oil flows through the first oil port 21 to the second oil port 22. That is, after the oil is sucked in by the oil suction port 11, it flows through the first oil outlet 12 and the first oil port 21 in sequence to the second oil port 22.

[0030] Reference Figure 2 As shown, when the vehicle reverses, the mechanical pump 2 reverses under the drive of the wheels, and the reversing solenoid valve 1 is de-energized, so that the oil suction port 11 is connected to the second oil outlet 13, and the second oil outlet 13 is connected to the second oil port 22. The oil flows through the second oil port 22 to the first oil port 21. That is, after the oil is sucked in by the oil suction port 11, it flows through the second oil outlet 13 and the second oil port 22 in sequence to the first oil port 21.

[0031] Under the action of the reversing solenoid valve 1, the mechanical pump 2 can draw oil regardless of whether it rotates forward or backward. This solves the problem in the prior art that the mechanical pump 2 cannot draw oil when the vehicle is reversing and an additional oil source needs to be introduced. This application only needs to cooperate with the mechanical pump 2 and the reversing solenoid valve 1 to switch the direction of oil flow by using the forward and reverse rotation of the mechanical pump 2 when the vehicle is moving forward or backward. This improves the system performance and reduces oil resistance.

[0032] In the embodiments provided in this application, the hydraulic system 10 is connected to the clutch oil circuit 20 to meet the oil pressure requirements of the clutch oil circuit 20. When the mechanical pump 2 rotates forward, the oil flowing out from the second oil port 22 and the oil flowing out from the first oil port 21 when the mechanical pump 2 rotates in reverse both flow to the clutch oil circuit 20 to supply oil to the clutch oil circuit 20.

[0033] When the mechanical pump 2 rotates forward and reverse, the oil flows in opposite directions, forming two independent oil circuits. To prevent interference between the two oil circuits, in one feasible embodiment, a first check valve 3 is provided on the connecting pipe between the first oil port 21 and the clutch oil circuit 20, and a second check valve 4 is provided on the connecting pipe between the second oil port 22 and the clutch oil circuit 20. When the mechanical pump 2 rotates forward, the oil flows sequentially through the suction port 11, the first oil outlet 12, the first oil port 21, and the second oil port 22, and then flows to the clutch oil circuit 20 through the second check valve 4. Similarly, when the mechanical pump 2 rotates in reverse, the oil flows sequentially through the suction port 11, the second oil outlet 13, the second oil port 22, and the first oil port 21, and then flows to the clutch oil circuit 20 through the first check valve 3. This ensures that oil is supplied to the clutch oil circuit 20 regardless of whether the vehicle is moving forward or backward, so as to meet the oil pressure requirements of the clutch. Under the action of the first one-way valve 3 and the second one-way valve 4, it is ensured that the two oil circuits do not interfere with each other, thereby improving the stability and reliability of the system.

[0034] After the hydraulic system 10 meets the oil pressure requirements of the clutch oil circuit 20, the oil can be delivered to the cooling and lubrication system 30 to meet the vehicle's cooling and lubrication needs. (Refer to...) Figure 1 and Figure 2 As shown, the hydraulic system 10 is connected to the cooling and lubrication system 30 to supply oil to the cooling and lubrication system 30. The oil flowing out from the second oil port 22 when the mechanical pump 2 rotates forward, and the oil flowing out from the first oil port 21 when the mechanical pump 2 rotates in reverse, can both flow to the cooling and lubrication system 30.

[0035] The oil pumped out by the mechanical pump 2 can flow to both the clutch oil circuit 20 and the cooling and lubrication system 30. Therefore, the clutch oil circuit 20 and the cooling and lubrication system 30 are connected in parallel. When the mechanical pump 2 rotates forward or reverse, the oil flowing out must meet the oil pressure requirements of the clutch before supplying oil to the cooling and lubrication system 30. Therefore, control components are provided on the connecting pipes of the first oil port 21 and the second oil port 22 to the cooling and lubrication system 30. The control components are used to control the flow of oil to the cooling and lubrication system 30.

[0036] When the clutch oil circuit 20 does not meet the oil pressure requirement, the control unit can control the oil to flow to the clutch oil circuit 20 to meet the clutch oil pressure requirement. After the oil meets the clutch oil pressure requirement, the control unit can control the oil to flow to the cooling and lubrication system 30. Thus, the control unit can control the oil to go to the cooling and lubrication system 30 while ensuring that the clutch oil pressure is met, so as to reasonably distribute the oil.

[0037] In one feasible implementation, the control element is an overflow valve 5, which is connected to the first oil port 21 and the second oil port 22 respectively. The overflow valve 5 can maintain the system pressure within a set safe range.

[0038] When the mechanical pump 2 rotates forward, the oil flowing out of the second oil port 22 first goes to the clutch oil circuit 20. Once the oil pressure meets the clutch requirements, the relief valve 5 opens, allowing the oil to flow to the cooling and lubrication system 30. Similarly, when the mechanical pump 2 rotates in reverse, the oil flowing out of the first oil port 21 first goes to the clutch oil circuit 20. Once the oil pressure meets the clutch requirements, the relief valve 5 opens, allowing the oil to flow to the cooling and lubrication system 30.

[0039] To ensure the cleanliness of the hydraulic fluid and prevent impurities in the fluid from damaging the equipment in the clutch oil circuit 20 and the cooling and lubrication system 30, the hydraulic system 10 of this application also includes a suction filter 6. The inlet end of the suction filter 6 is connected to the oil sump, and the outlet end of the suction filter 6 is connected to the suction port 11. When the mechanical pump 2 is running, the oil in the oil sump can pass through the suction filter 6 to filter out impurities before entering the hydraulic system 10 through the suction port 11, effectively preventing impurities in the fluid from damaging downstream equipment.

[0040] Secondly, this utility model provides a vehicle including the aforementioned hydraulic system 10. When the vehicle moves forward or backward, the hydraulic system 10 can meet the oil supply needs of the clutch oil circuit 20 and the cooling and lubrication system 30 without the need for an additional oil source, reducing the control difficulty and operating cost of the system, and improving the safety and reliability of the vehicle.

[0041] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A hydraulic system, characterized in that, include: A reversing solenoid valve, the reversing solenoid valve including an oil suction port, a first oil outlet port and a second oil outlet port; A mechanical pump, the mechanical pump including a first oil port and a second oil port, the first oil port and the second oil port being connected to each other; in: When the mechanical pump rotates forward, the oil suction port is connected to the first oil outlet port, and the first oil outlet port is connected to the first oil port port. The oil flows from the first oil port port to the second oil port port. When the mechanical pump reverses, the oil suction port is connected to the second oil outlet, and the second oil outlet is connected to the second oil port, and the oil flows from the second oil port to the first oil port.

2. The hydraulic system according to claim 1, characterized in that, The hydraulic system is connected to the clutch oil circuit. When the mechanical pump rotates forward, the oil flowing out from the second oil port, and when the mechanical pump rotates in reverse, the oil flowing out from the first oil port, both flow to the clutch oil circuit.

3. The hydraulic system according to claim 2, characterized in that, A first check valve is provided on the connecting pipe between the first oil port and the clutch oil circuit.

4. The hydraulic system according to claim 2, characterized in that, A second check valve is provided on the connecting pipe between the second oil port and the clutch oil circuit.

5. The hydraulic system according to claim 2, characterized in that, The hydraulic system is connected to the cooling and lubrication system to supply oil to the cooling and lubrication system. The oil flowing out from the second oil port when the mechanical pump rotates forward, and the oil flowing out from the first oil port when the mechanical pump rotates in reverse, can both flow to the cooling and lubrication system.

6. The hydraulic system according to claim 5, characterized in that, The clutch oil circuit and the cooling and lubrication system are connected in parallel.

7. The hydraulic system according to claim 6, characterized in that, A control element is provided on the connecting pipe between the first oil port and the second oil port and the cooling and lubrication system. The control element is used to control the flow of oil to the cooling and lubrication system.

8. The hydraulic system according to claim 7, characterized in that, The control component is an overflow valve.

9. The hydraulic system according to claim 1, characterized in that, The hydraulic system also includes an oil suction filter, the inlet end of which is connected to the oil sump, and the outlet end of which is connected to the oil suction port.

10. A vehicle, characterized in that, Includes the hydraulic system as described in any one of claims 1 to 9.

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