Hydraulic automatic transmission hydraulic valve block electromagnetic valve jitter curve test system and method

Abstract

The application discloses a hydraulic automatic transmission hydraulic valve block electromagnetic valve flutter curve test system and method, which comprises an oil tank, an oil pump, a pressure stabilizing valve, a valve block electromagnetic valve, a first pressure sensor, a second pressure sensor and a control cabinet; the outlet of the oil tank is connected with the oil pump, the oil pump is connected with one end of the pressure stabilizing valve, and the other end of the pressure stabilizing valve is connected with the oil tank; the pressure stabilizing valve is further connected with the valve block electromagnetic valve, the valve block electromagnetic valve is connected with the oil tank and the control cabinet; the first pressure sensor is arranged on the pressure stabilizing valve, the second pressure sensor is arranged on the valve block electromagnetic valve, and the first pressure sensor and the second pressure sensor are both connected with the control cabinet. The application can automatically test the flutter curve of the hydraulic valve block, and provides a qualified standard and a calculation method for the flutter curve of the hydraulic valve block, so that the test result is more scientific, the control of the valve block on the clutch is more accurate, and the driving comfort is improved.

Description

Technical Field

[0001] This invention belongs to the field of solenoid valve technology for hydraulic automatic transmissions, and specifically relates to a test system and method for testing the solenoid valve vibration curve of hydraulic valve block in hydraulic automatic transmissions. Background Technology

[0002] The hydraulic valve block is a key component of a hydraulic automatic transmission. It mainly consists of solenoid valves, valve cores, accumulators, and hydraulic valve housings. During actual driving, the TCU (Transmission Control Unit) sends shift signals to the hydraulic valve block. Upon receiving the control commands from the TCU, the solenoid valve in the hydraulic valve block pushes the valve core within the hydraulic valve housing, distributing hydraulic fluid to different functional parts of the transmission to achieve shifting, locking, and other functions. Therefore, the ability of the solenoid valve to effectively push the valve core after receiving TCU commands is crucial for hydraulic automatic transmissions. Currently, most tests on the solenoid valve vibration curves of hydraulic automatic transmissions containing hydraulic valve blocks are manual, and the results are largely subjective and inaccurate. Summary of the Invention

[0003] The purpose of this invention is to provide a test system and method for the solenoid valve vibration curve of hydraulic valve block in hydraulic automatic transmissions, so as to solve the problem that the results are subjective and inaccurate when relying on manual judgment.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A hydraulic automatic transmission hydraulic valve block solenoid valve vibration curve testing system includes an oil tank, an oil pump, a pressure regulating valve, a valve block solenoid valve, a first pressure sensor, a second pressure sensor, and a control cabinet. The outlet of the oil tank is connected to the oil pump, the oil pump is connected to one end of the pressure regulating valve, and the other end of the pressure regulating valve is connected to the oil tank. The pressure regulating valve is also connected to the valve block solenoid valve, which is connected to both the oil tank and the control cabinet. The first pressure sensor is mounted on the pressure regulating valve, and the second pressure sensor is mounted on the valve block solenoid valve. Both the first and second pressure sensors are connected to the control cabinet.

[0006] Furthermore, an oil filter is installed at the oil pump outlet.

[0007] Furthermore, a first check valve is provided between the oil filter and the pressure regulating valve.

[0008] Furthermore, a second check valve is installed between the other end of the pressure regulating valve and the oil tank.

[0009] Furthermore, the test method for the solenoid valve chatter curve of the hydraulic valve block in a hydraulic automatic transmission includes the following steps:

[0010] Start the system so that the industrial control computer in the control cabinet can control the solenoid valves of the hydraulic valve block of the hydraulic automatic transmission;

[0011] The operating current of the solenoid valve is divided into n equal currents I1, I2, ..., I... n ;

[0012] A pre-set current of m, from small to large, is applied sequentially to the solenoid valve under test every few seconds.

[0013] While applying current, the industrial control computer acquires the pressure from the second pressure sensor and records the current and pressure in a one-to-one correspondence as p1, p2, ..., p n The industrial control computer calculates the variance σ of the collected samples.

[0014] The industrial control computer determines the magnitude of the sample variance σ and the preset K value: X = σ - K;

[0015] The industrial control computer calculates X three times. If X is less than 0 in all three tests, the industrial control computer issues a stop command and displays "pass". If X is greater than 0 in any of the three tests, the industrial control computer issues an alarm, stops the test, and displays "fail".

[0016] Furthermore, the time interval for applying the preset current is 10 seconds.

[0017] Furthermore, K is the product of the influence factors of the solenoid valve and the valve core spring and the ideal variance plus 0.05.

[0018] Furthermore, the industrial control computer in the control cabinet controls the solenoid valves of the hydraulic valve block of the hydraulic automatic transmission:

[0019] The control cabinet controls the oil pump to rotate, drawing oil from the oil tank. The oil passes through the oil filter and goes to the pressure regulating valve. The first pressure sensor collects the oil pressure passing through the pressure regulating valve and sends the data to the control cabinet. After the control cabinet determines that the oil pressure is within acceptable limits, it starts to control the valve block solenoid valve to operate. At the same time, the second pressure sensor collects the oil passing through the solenoid valve and sends the collected signal to the control cabinet. The control cabinet completes the control of the hydraulic valve block solenoid valve of the hydraulic automatic transmission.

[0020] Furthermore, the variance σ of the collected samples is calculated:

[0021]

[0022]

[0023] Compared with the prior art, the present invention has the following technical effects:

[0024] This invention addresses hydraulic automatic transmissions containing hydraulic valve blocks, providing a method and system for testing the solenoid valve shudder curve of the hydraulic valve block. The system can automatically test the shudder curve of the hydraulic valve block and provides a pass / fail standard and calculation method for the shudder curve. The test results are more scientific, resulting in more precise clutch control by the valve block that passes the test, thus improving driving comfort. Attached Figure Description

[0025] Figure 1 This is a system structure diagram of the present invention;

[0026] Figure 2 This is a flowchart of the present invention.

[0027] in:

[0028] 1. Oil tank; 2. Oil pump; 3. Oil filter; 4. First check valve; 5. Pressure regulating valve; 6. First pressure sensor; 7. Second pressure sensor; 8. Valve block solenoid valve; 9. Second check valve; 10. Control cabinet. Detailed Implementation

[0029] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] Please see Figure 1This invention provides a method and system for testing the solenoid valve vibration curve of a hydraulic automatic transmission containing a hydraulic valve block, which can automatically complete the testing and determination of the solenoid valve vibration curve of the hydraulic automatic transmission.

[0033] The technical solution is as follows:

[0034] The system includes: an oil tank, an oil pump, an oil filter, a check valve 1, a pressure regulating valve, a check valve 2, a valve block, a pressure sensor, and a control cabinet. The control cabinet controls the oil pump to rotate, drawing oil from the oil tank. The oil passes through the oil filter and goes to the pressure regulating valve. The first pressure sensor collects the oil pressure passing through the pressure regulating valve and sends the data to the control cabinet. After the control cabinet determines that the oil pressure is within acceptable limits, it starts to control the valve block solenoid valve to operate. At the same time, the second pressure sensor collects the oil passing through the solenoid valve and sends the collected signal to the control cabinet. The control cabinet completes the acquisition and analysis of pressure and corresponding current when controlling the hydraulic valve block solenoid valve of the hydraulic automatic transmission.

[0035] During the data acquisition and analysis process, the industrial control computer performs the following steps:

[0036] The operating current of the solenoid valve is divided into n equal currents (I1, I2, ..., I...). n )

[0037] Apply n pre-set currents (I1, I2, ..., I6) in ascending order to the solenoid valve under test every 10 seconds. n )

[0038] While applying current, the industrial control computer acquires the pressure collected by the second pressure sensor and records the current and pressure in a one-to-one correspondence (p1, p2, ..., p...). n )

[0039] The industrial control computer calculates the variance of the collected samples.

[0040] in

[0041] The industrial control computer determines the magnitude of the sample variance σ relative to a preset K value (K is the product of the influence factors of the solenoid valve and valve core spring and the ideal variance plus 0.05): X = σ - K.

[0042] The industrial control computer repeats steps 2-5 three times. If the result X is less than 0 in all three tests, the industrial control computer issues a stop command and displays "qualified". If X is greater than 0 in any of the three tests, the industrial control computer issues an alarm, stops the test, and displays "unqualified".

[0043] according to Figure 1 Connect the components sequentially as shown in the diagram, and then connect the control cabinet according to the instructions. Figure 2Testing is conducted as follows: The industrial control computer controls the oil pump to rotate, drawing oil from the oil tank. The oil passes through the oil filter and goes to the pressure regulating valve. The first pressure sensor collects the oil pressure passing through the pressure regulating valve and sends the data to the control cabinet. After the control cabinet determines that the oil pressure is within acceptable limits, it starts to control the valve block solenoid valve to operate. At the same time, the second pressure sensor collects the oil passing through the solenoid valve and sends the collected signal to the control cabinet. The control cabinet completes the collection and analysis of the pressure and corresponding current during the control of the hydraulic valve block solenoid valve of the hydraulic automatic transmission and provides the corresponding test results.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic automatic transmission hydraulic valve block solenoid valve chatter curve testing system, characterized in that, The system includes an oil tank (1), an oil pump (2), a pressure regulating valve (5), a valve block solenoid valve (8), a first pressure sensor (6), a second pressure sensor (7), and a control cabinet (10). The outlet of the oil tank (1) is connected to the oil pump (2), the oil pump (2) is connected to one end of port A of the pressure regulating valve (5), and port C of the pressure regulating valve (5) is connected to the oil tank (1). Port B of the pressure regulating valve (5) is connected to the valve block solenoid valve (8), and the valve block solenoid valve (8) is connected to the oil tank (1) and the control cabinet (10). The first pressure sensor (6) is installed on the pressure regulating valve (5), and the second pressure sensor (7) is installed on the pressure regulating valve (5). On the valve block solenoid valve (8), the first pressure sensor (6) and the second pressure sensor (7) are both connected to the control cabinet (10); the pressure stabilizing valve is a hydraulically controlled directional valve with a first valve position and a second valve position. When it is in the first valve position, only port A and port B are connected, and ports A and B are not connected to port C. When it is in the second valve position, ports A, B and C are all connected; one end of the pressure stabilizing valve is a hydraulically controlled port, which is connected to port A of the pressure stabilizing valve, enabling the pressure stabilizing valve to move to the first valve position; the other end of the pressure stabilizing valve is equipped with a spring; a second check valve is also provided between port C of the pressure stabilizing valve and the oil tank.

2. The hydraulic automatic transmission hydraulic valve block solenoid valve chatter curve testing system according to claim 1, characterized in that, An oil filter (3) is installed at the outlet of the oil pump (2).

3. The hydraulic automatic transmission hydraulic valve block solenoid valve chatter curve testing system according to claim 2, characterized in that, A first check valve (4) is provided between the oil filter (3) and the pressure regulating valve (5).

4. A method for testing the solenoid valve chatter curve of a hydraulic automatic transmission hydraulic valve block, characterized in that, The hydraulic automatic transmission hydraulic valve block solenoid valve chatter curve testing system according to any one of claims 1 to 3 includes the following steps: Start the system so that the industrial control computer in the control cabinet can control the solenoid valves of the hydraulic valve block of the hydraulic automatic transmission; Divide the operating current of the solenoid valve into n equal currents. ; A pre-set current of m, from small to large, is applied sequentially to the solenoid valve under test every few seconds. While the current is applied, the industrial control computer acquires the pressure data from the second pressure sensor and records the current and pressure in a one-to-one correspondence. The industrial control computer calculates the variance σ of the collected samples. The industrial control computer determines the magnitude of the sample variance σ and the preset K value: X = σ - K; The industrial control computer calculates X three times. If X is less than 0 in all three tests, the industrial control computer issues a stop command and displays "pass". If X is greater than 0 in any of the three tests, the industrial control computer issues an alarm, stops the test, and displays "fail".

5. The method for testing the solenoid valve chatter curve of a hydraulic automatic transmission hydraulic valve block according to claim 4, characterized in that, The time interval for applying the preset current is 10 seconds.

6. The method for testing the solenoid valve chatter curve of a hydraulic automatic transmission hydraulic valve block according to claim 4, characterized in that, K is the product of the influence factors of the solenoid valve and the valve core spring and the ideal variance plus 0.

05.

7. The method for testing the solenoid valve chatter curve of a hydraulic automatic transmission hydraulic valve block according to claim 4, characterized in that, The industrial computer in the control cabinet controls the solenoid valves of the hydraulic valve block in the hydraulic automatic transmission. The control cabinet controls the oil pump to rotate, drawing oil from the oil tank. The oil passes through the oil filter and goes to the pressure regulating valve. The first pressure sensor collects the oil pressure passing through the pressure regulating valve and sends the data to the control cabinet. After the control cabinet determines that the oil pressure is within acceptable limits, it starts to control the valve block solenoid valve to operate. At the same time, the second pressure sensor collects the oil passing through the solenoid valve and sends the collected signal to the control cabinet. The control cabinet completes the control of the hydraulic valve block solenoid valve of the hydraulic automatic transmission.

8. The method for testing the solenoid valve chatter curve of a hydraulic automatic transmission hydraulic valve block according to claim 4, characterized in that, Calculate the variance σ of the collected samples: 。

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