A test device for automobile automatic transmission solenoid valve and valve body

Abstract

The present invention discloses a testing device for a solenoid valve and a valve body of an automobile automatic transmission, wherein the inlet of an oil pump motor unit is connected to an oil tank, and the outlet is connected to the inlet of a reversing unit, and the outlets of the reversing units are respectively connected to corresponding test fixture units through regulating units, the oil pump motor unit comprises a motor and an oil pump controlled by the motor, the reversing unit is used to switch the oil flow direction to the test fixture unit to be operated, and the regulating unit is used to control the pressure and flow of the oil circuit; the problem that the performance test results of the solenoid valve and the valve body are not reliable enough due to the difference between the simulated test conditions and the actual operating conditions is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile automatic transmission testing, in particular to a testing device for an automobile automatic transmission solenoid valve and a valve body. Background Art

[0002] As a key component of an automatic transmission, the performance of the hydraulic valve body is crucial to the transmission's control accuracy and system stability. The solenoid valve, as the control core of the hydraulic valve body, has a direct impact on its performance. Therefore, conducting solenoid valve and valve body testing and verification to understand their performance is a crucial step in the development of automatic transmission hydraulic control systems. The test device simulates the operation of the solenoid valve and valve body in an automobile automatic transmission to test their performance. This difference from actual operating conditions can lead to discrepancies between the test results and actual operating performance of the solenoid valve and valve body. Summary of the Invention

[0003] (1) Technical issues to be resolved

[0004] In view of the above problems, the present invention provides a testing device for a solenoid valve and a valve body of an automobile automatic transmission, which improves the reliability of the performance test of the solenoid valve and the valve body.

[0005] (2) Technical solution

[0006] Based on the above technical problems, the present invention provides a testing device for the solenoid valve and valve body of an automobile automatic transmission, wherein the inlet of the oil pump motor unit is connected to the oil tank, and the outlet is connected to the inlet of the reversing unit. The outlets of the reversing unit are respectively connected to the corresponding test fixture units through the adjustment units. The oil pump motor unit includes a motor and an oil pump controlled by the motor. The reversing unit is used to switch the direction of oil flow to the test fixture unit to be worked, and the adjustment unit is used to control the pressure and flow of the oil circuit.

[0007] Furthermore, the oil pump includes oil pump 1 and oil pump 2, the reversing unit includes reversing valve 1 and reversing valve 2, the test fixture unit includes test fixture unit 1 and test fixture unit 2, and the regulating unit includes regulating unit 1, regulating unit 2, and regulating unit 3; the outlet of the oil pump 1 is connected to oil circuit 3 and oil circuit 4 respectively through oil circuit 1 and reversing valve 1, the oil circuit 3 is connected to test fixture unit 1 through regulating unit 1, the oil circuit 4 is connected to test fixture unit 2 through regulating unit 2, and the outlet of the oil pump 2 is connected to test fixture unit 2 through oil circuit 2, reversing valve 2, oil circuit 5, and regulating unit 3; when oil circuit 1 is connected to oil circuit 4 and oil circuit 2 is connected to oil circuit 5, the test fixture unit 2 is tested, and when oil circuit 1 is connected to oil circuit 3 and oil circuit 2 is not connected to oil circuit 5, the test fixture unit 1 is tested, and the oil pump 1 and oil pump 2 are double pumps controlled by one motor or two single pumps controlled by two motors respectively.

[0008] Preferably, the reversing valve 1 is a one-inlet, two-outlet, two-position, three-way electromagnetic reversing valve, and the left position outlet is connected to oil circuit four, and the right position outlet is connected to oil circuit three. The reversing valve 2 is a two-position, two-way electromagnetic reversing valve, and the left position is open and the right position is closed. When the reversing valve 1 and the reversing valve 2 are in the left position, the oil circuit 1 is connected with the oil circuit four, and the oil circuit 2 is connected with the oil circuit five; when the reversing valve 1 and the reversing valve 2 are in the right position, the oil circuit 1 is connected with the oil circuit three, and the oil circuit 2 is not connected with the oil circuit five.

[0009] Preferably, the test fixture unit 1 includes a solenoid valve test fixture connected to the return oil circuit, and the test fixture unit 2 includes a valve body test fixture, an adjustable flow valve 1 and a one-way valve forming a connection circuit with the valve body test fixture, and an adjustable flow valve 2 and an adjustable flow valve 3 connected between the valve body test fixture and the return oil circuit; the adjustable flow valve 1 and the one-way valve are used to simulate the torque converter; the adjustable flow valve 2 and the adjustable flow valve 3 are used to simulate the cooling and lubrication oil circuit loads.

[0010] Preferably, the test fixtures included in the test fixture unit are all connected to the corresponding connecting oil circuits in a detachable connection manner, so as to facilitate replacement or exchange of the test fixture unit.

[0011] Preferably, the oil circuit 1 and the oil circuit 2 are respectively connected to the safety valve 1 and the safety valve 2 connected to the return oil circuit, so as to ensure that the system pressure does not exceed the limit.

[0012] Preferably, the oil tank includes a clean oil tank and a dirty oil tank, which are connected by an oil transfer device. The dirty oil tank is connected to the return oil circuit, and the clean oil tank is connected to the motor oil pump unit. The oil transfer device is used to extract the oil from the dirty oil tank and flow it into the clean oil tank after filtering and cooling.

[0013] Preferably, the clean oil tank is connected to a mold temperature controller for controlling the temperature rise and fall of the oil in the clean oil tank.

[0014] Preferably, the regulating unit comprises a pressure control valve, an accumulator and a flow control valve connected in sequence, and the accumulator is used to compensate for pressure fluctuations and maintain pressure stability.

[0015] Preferably, the pressure control valve is a proportional relief valve; and the flow control valve is a proportional flow valve.

[0016] (3) Beneficial effects

[0017] The above technical solution of the present invention has the following advantages:

[0018] (1) The present invention uses two oil pumps, which are more consistent with the double-acting vane pumps commonly used in automobile automatic transmissions. The simulated operation is closer to the actual operating conditions, which improves the reliability of performance testing. In particular, it is suitable for automatic transmission hydraulic control systems with single-double pump switching or flow control.

[0019] (2) The present invention controls the first and second reversing valves to test the solenoid valve or valve body, and simulates the torque converter and oil circuit load as needed, so that the simulation is closer to the actual working conditions and the test reliability of the test tool is improved;

[0020] (3) The present invention realizes different working condition tests by controlling the parameters of the flow controller, pressure controller and mold temperature controller. The device has a simple structure, multiple testing functions, low equipment investment, strong versatility and high utilization rate, thereby effectively reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, which are schematic and should not be construed as limiting the present invention in any way. In the accompanying drawings:

[0022] Figure 1 This is a schematic diagram of a testing device for a solenoid valve and a valve body of an automobile automatic transmission according to an embodiment of the present invention;

[0023] In the figure: 1: Dirty oil tank; 2: Oil transfer device; 3: Motor; 4: Duplex pump; 5: Clean oil tank; 6: Mold temperature controller; 7: Safety valve one; 8: Oil circuit one; 9: Reversing valve one; 10: Solenoid valve test fixture; 11: Flow control valve one; 12: Accumulator one; 13: Pressure control valve one; 14: Oil circuit three; 15: Oil circuit four; 16: Oil circuit five; 17: Pressure control valve two; 18: Accumulator two; 19: Flow control valve two; 20: Valve body test fixture; 21: Safety valve two; 22: Oil circuit two; 23: Reversing valve two; 24: Pressure control valve three; 25: Accumulator three; 26: Flow control valve three; 27: Adjustable flow valve one; 28: One-way valve; 29: Adjustable flow valve two; 30: Adjustable flow valve three. DETAILED DESCRIPTION

[0024] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0025] A testing device for a solenoid valve and valve body of an automobile automatic transmission, wherein the inlet of an oil pump motor unit is connected to a fuel tank, and the outlet is connected to the inlet of a reversing unit. The outlets of the reversing units are respectively connected to corresponding test fixture units via adjustment units. The oil pump motor unit includes a motor and an oil pump controlled by the motor. The reversing unit is used to switch the direction of oil flow to the test fixture unit to be operated, and the adjustment unit is used to control the pressure and flow of the oil circuit.

[0026] like Figure 1 In the embodiment shown, the oil pump motor unit includes a motor 3 and an oil pump controlled by the motor. The oil pump is a double pump 4, including oil pump 1 and oil pump 2; the reversing unit includes reversing valve 1 9 and reversing valve 2 23; the test fixture unit includes test fixture unit 1 and test fixture unit 2; the regulating unit includes regulating unit 1, regulating unit 2, and regulating unit 3. The regulating units each include a pressure control valve, an accumulator, and a flow control valve connected in sequence. The accumulator is used to compensate for pressure fluctuations and maintain pressure stability; the oil tank includes a clean oil tank 5 and a dirty oil tank 1, which are connected through an oil transfer device 2. The dirty oil tank 1 is connected to the return oil circuit, and the clean oil tank 5 is connected to the oil pump motor unit. The oil transfer device 2 is used to extract oil from the dirty oil tank 1, which flows into the clean oil tank 5 after filtering and cooling. The clean oil tank 5 is connected to the mold temperature controller 6 to control the rise and fall of the oil temperature in the clean oil tank 5.

[0027] The inlet of the double pump 4 is connected to the clean oil tank 5, and the two outlets of the double pump 4 are respectively connected to the oil circuit 1 8 and the oil circuit 2 22. The oil circuit 1 8 is respectively connected to the oil circuit 3 14 and the oil circuit 4 15 through the reversing valve 1 9. The oil circuit 3 14 is connected to the test tooling unit 1 through the pressure control valve 1 13, the accumulator 1 12, and the flow control valve 1 11. The oil circuit 4 15 is connected to the test tooling unit 2 through the pressure control valve 2 17, the accumulator 2 18, and the flow control valve 2 19; the oil circuit 2 22 is connected to the test tooling unit 2 through the reversing valve 2 23, the oil circuit 5 16, the pressure control valve 3 24, the accumulator 3 25, and the flow control valve 3 26.

[0028] When the oil circuit 1 8 is connected to the oil circuit 4 15 and the oil circuit 2 22 is connected to the oil circuit 5 16, the test fixture unit 2 is tested; when the oil circuit 1 8 is connected to the oil circuit 3 14 and the oil circuit 2 22 is not connected to the oil circuit 5 16, the test fixture unit 1 is tested; in this embodiment, the reversing valve 1 9 is a one-inlet-two-outlet two-position three-way electromagnetic reversing valve, including an inlet, a left position outlet and a right position outlet, and the reversing valve 2 23 is a two-position two-way electromagnetic reversing valve, and is in an open state when in the left position and in an open state when in the right position. It is in a closed state when in the right position; therefore, oil circuit 1 8 is connected to the inlet of reversing valve 1 9, the left position outlet of reversing valve 1 9 is connected to oil circuit 4 15, the right position outlet is connected to oil circuit 3 14, oil circuit 2 22 is connected to the inlet of reversing valve 2 23, and the outlet of reversing valve 2 23 is connected to oil circuit 5 16. When the reversing valve 1 9 and reversing valve 2 23 are in the left position, the test fixture unit 2 is tested; when the reversing valve 1 9 and reversing valve 2 23 are in the right position, the test fixture unit 1 is tested.

[0029] In this embodiment, the test fixture unit 1 includes a solenoid valve test fixture 10 connected to the return oil circuit. The solenoid valve has a small flow demand, so it is only connected to a single pump and a single oil circuit; and the test fixture unit 2 includes a valve body test fixture 20, an adjustable flow valve 1 27 and a one-way valve 28 forming a connection circuit with the valve body test fixture 20, and an adjustable flow valve 2 29 and an adjustable flow valve 3 30 connected between the valve body test fixture 20 and the return oil circuit; the valve body has a large flow and pressure demand, so it is connected to a dual pump and a dual oil circuit, and the valve body has a hydraulic transmission when in use, in order to To make the simulation closer to actual working conditions, the adjustable throttle valve 1 27 and the one-way valve 28 are required to simulate the torque converter, and the adjustable throttle valve 29 and the adjustable throttle valve 30 are required to simulate the cooling and lubrication oil circuit loads. The test fixtures included in the test fixture unit are all connected to the corresponding connecting oil circuits through a detachable connection method, so that the position of the test fixture unit 1 and the test fixture unit 2 can be exchanged or the test fixture unit can be replaced according to the different tested parts. In this embodiment, the solenoid valve test fixture 10 and the valve body test fixture 20 are both connected to the corresponding connecting oil circuits through quick hydraulic connectors.

[0030] Oil circuit 1 8 and oil circuit 2 22 are connected to safety valve 1 7 and safety valve 2 21, respectively, which are connected to the return oil circuit, to ensure that the system pressure does not exceed the limit. In this embodiment, safety valve 1 7 and safety valve 2 21 are relief valves. The pressure control valves and flow control valves are used to control the pressure and flow of the oil circuits respectively. Pressure control valve 1 13, pressure control valve 2 17, and pressure control valve 3 24 can be proportional relief valves; flow control valve 1 11, flow control valve 2 19, and flow control valve 3 26 can be proportional flow valves.

[0031] When the solenoid valve test is required, the control reversing valve 1 9 and the reversing valve 2 23 are in the right position, and the oil enters the solenoid valve testing tool 20 through the oil circuit 1 8, the control reversing valve 1 9, the oil circuit 3 14, the pressure control valve 1 13, the accumulator 12, and the flow control valve 1 11 to perform the solenoid valve performance test; when the valve body test is required, the control reversing valve 1 9 and the reversing valve 2 23 are in the left position, and the oil enters the valve body testing tool 20 through the oil circuit 1 8, the control reversing valve 1 9, the oil circuit 4 15, the pressure control valve 2 17, the accumulator 2 18, and the flow control valve 2 19, and at the same time enters the valve body testing tool 20 through the oil circuit 2 22, the reversing valve 2 23, the pressure control valve 3 24, the accumulator 3 25, and the flow control valve 3 26 to perform the valve body performance test.

[0032] In another embodiment, the reversing valve 1 9 can be a three-position, four-way electro-hydraulic reversing valve, which can be a two-input, two-output type or a one-input, three-output type, with the redundant inlet or outlet connected to the return oil circuit, and the reversing valve 2 23 can be a two-position, three-way electro-hydraulic reversing valve, with the redundant inlet or outlet connected to the return oil circuit, or the reversing valve 2 23 can also be cancelled, then the oil circuit 2 22 and the oil circuit 5 16 are always connected, and when the test tooling unit 2 is not working, the oil returns to the oil circuit after passing through the test tooling unit 2.

[0033] In another embodiment, the motor oil pump unit includes two motors and two single pumps respectively controlled by the two motors, and the oil circuit connection is the same as that of the embodiment using a double pump, and the same effect can be achieved; in an automatic transmission hydraulic control system with single-double pump switching or flow control, the motor oil pump unit cannot use a large-scale single pump controlled by a motor to replace the double pump controlled by one motor or the two single pumps respectively controlled by two motors in the embodiment. This is because when a large-scale single pump is used, although the oil can be diverted for control, the flow and pressure of the oil circuit after diversion will affect each other and are not independent of each other, that is, the oil diverted through oil circuit 18 and oil circuit 28 will not be able to be controlled. Oil Line 4 15, Oil Line 2 22, and Oil Line 5 16 are connected to the valve body test fixture 20. When the loads on the diverted oil lines are the same, the diverted oil lines function normally. When the hydraulic control system needs to simulate switching to single-pump operation, the hydraulic valve body connects oil through Oil Line 1 8 and Oil Line 4 15 to the return oil line, and then enters the valve body test fixture 20 for testing via Oil Line 2 22 and Oil Line 5 16. However, at this time, Oil Line 1 8 and Oil Line 4 15 are unloaded, and more oil will flow through Oil Line 1 8 and Oil Line 4 15 into the return oil line, affecting the flow of Oil Line 2 22 and Oil Line 5 16, or even causing no flow, causing the valve body test fixture 20 to malfunction and affect the test results. However, in a test system using a dual pump or two single pumps, Oil Line 1 8 and Oil Line 4 15 are independent from Oil Line 2 22 and Oil Line 5 16. When the test device simulates switching between single and dual pumps in the hydraulic control system, the test system functions normally, improving the reliability of the performance test.

[0034] The test method of the test device is:

[0035] S1. Install the solenoid valve and valve body to be tested on the solenoid valve test fixture 10 and the valve body test fixture 20 respectively, and inspect and test the test device;

[0036] S2. Set parameters according to different working conditions, and set the parameters of pressure control valve, flow control valve, safety valve and other components respectively;

[0037] S3. Start the test: When the control reversing valve 1 9 and the reversing valve 2 23 are in the right position, the solenoid valve test is performed; when the control reversing valve 1 9 and the reversing valve 2 23 are in the left position, the valve body test is performed;

[0038] S4. Record the test results separately, turn off the power, and remove the tested device.

[0039] In summary, the above-mentioned testing device for automobile automatic transmission solenoid valve and valve body has the following advantages:

[0040] (1) The present invention uses two oil pumps, which are more consistent with the double-acting vane pumps commonly used in automobile automatic transmissions. The simulated operation is closer to the actual operating conditions, which improves the reliability of performance testing. In particular, it is suitable for automatic transmission hydraulic control systems with single-double pump switching or flow control.

[0041] (2) The present invention controls the first and second reversing valves to test the solenoid valve or valve body, and simulates the torque converter and oil circuit load as needed, so that the simulation is closer to the actual working conditions and the test reliability of the test tool is improved;

[0042] (3) The present invention realizes different working condition tests by controlling the parameters of the flow controller, pressure controller and mold temperature controller. The device has a simple structure, multiple testing functions, low equipment investment, strong versatility and high utilization rate, thereby effectively reducing costs.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations shall fall within the scope defined by the appended claims.

Claims

1. A testing device for a solenoid valve and a valve body of an automobile automatic transmission, characterized in that: The inlet of the oil pump motor unit is connected to the oil tank, and the outlet is connected to the inlet of the reversing unit. The outlet of the reversing unit is connected to the corresponding test fixture unit through the regulating unit. The oil pump motor unit includes a motor and an oil pump controlled by the motor. The reversing unit is used to switch the oil flow direction to the test fixture unit to be operated, and the regulating unit is used to control the pressure and flow of the oil circuit; The oil pump includes oil pump 1 and oil pump 2, the reversing unit includes reversing valve 1 and reversing valve 2, the test fixture unit includes test fixture unit 1 and test fixture unit 2, the regulating unit includes regulating unit 1, regulating unit 2 and regulating unit 3; the outlet of the oil pump 1 is connected to oil circuit 3 and oil circuit 4 respectively through oil circuit 1 and reversing valve 1, the oil circuit 3 is connected to test fixture unit 1 through regulating unit 1, the oil circuit 4 is connected to test fixture unit 2 through regulating unit 2, the outlet of the oil pump 2 is connected to test fixture unit 2 through oil circuit 2, reversing valve 2, oil circuit 5 and regulating unit 3; when oil circuit 1 is connected to oil circuit 4 and oil circuit 2 is connected to oil circuit 5, the test fixture unit 2 is tested, when oil circuit 1 is connected to oil circuit 3 and oil circuit 2 is not connected to oil circuit 5, the test fixture unit 1 is tested, the oil pump 1 and oil pump 2 are double pumps controlled by one motor or two single pumps controlled by two motors respectively; The reversing valve 1 is a two-position three-way electromagnetic reversing valve with one inlet and two outlets, and the left position outlet is connected to the oil circuit 4, and the right position outlet is connected to the oil circuit 3. The reversing valve 2 is a two-position two-way electromagnetic reversing valve, and the left position is open and the right position is closed. When the reversing valve 1 and the reversing valve 2 are in the left position, the oil circuit 1 is connected with the oil circuit 4, and the oil circuit 2 is connected with the oil circuit 5; when the reversing valve 1 and the reversing valve 2 are in the right position, the oil circuit 1 is connected with the oil circuit 3, and the oil circuit 2 is not connected with the oil circuit 5; The test fixture unit 1 includes a solenoid valve test fixture connected to the return oil circuit, and the test fixture unit 2 includes a valve body test fixture, an adjustable flow valve 1 and a check valve forming a connection circuit with the valve body test fixture, and an adjustable valve connected between the valve body test fixture and the return oil circuit. Flow valve 2 and adjustable flow valve 3; the adjustable flow valve 1 and the check valve are used to simulate the torque converter; the adjustable flow valve 2 and the adjustable flow valve 3 are used to simulate the cooling and lubricating oil circuit loads; The oil circuit 1 and the oil circuit 2 are respectively connected to the safety valve 1 and the safety valve 2 connected to the return oil circuit, so as to ensure that the system pressure does not exceed the limit.

2. A testing device for a solenoid valve and a valve body of an automobile automatic transmission according to claim 1, characterized in that: The test fixtures included in the test fixture unit are all connected to the corresponding connecting oil circuits in a detachable connection manner, so as to facilitate the replacement or exchange of the test fixture unit.

3. A testing device for a solenoid valve and a valve body of an automobile automatic transmission according to claim 1, characterized in that: The oil tank includes a clean oil tank and a dirty oil tank, which are connected through an oil transfer device. The dirty oil tank is connected to the return oil circuit, and the clean oil tank is connected to the motor oil pump unit. The oil transfer device is used to extract oil from the dirty oil tank and flow it into the clean oil tank after filtering and cooling.

4. A testing device for a solenoid valve and a valve body of an automobile automatic transmission according to claim 3, characterized in that: The clean oil tank is connected to a mold temperature controller to control the rise and fall of the oil temperature of the clean oil tank.

5. A testing device for a solenoid valve and a valve body of an automobile automatic transmission according to claim 1, characterized in that: The regulating unit comprises a pressure control valve, an accumulator and a flow control valve which are connected in sequence. The accumulator is used to compensate for pressure fluctuations and maintain pressure stability.

6. A testing device for a solenoid valve and a valve body of an automobile automatic transmission according to claim 5, characterized in that: The pressure control valve is a proportional relief valve; the flow control valve is a proportional flow valve.

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