Vibration test system and method for AMT pneumatic gear shifting execution mechanism of commercial vehicle

Abstract

The invention belongs to the field of vibration testing of pneumatic gear shifting executing mechanisms, and particularly relates to a vibration testing system and method of a commercial vehicle AMT pneumatic gear shifting executing mechanism. The system comprises a gear shifting execution mechanism, a vibration test bench, a TCU and an upper computer. The gear shifting execution mechanism is installed on the vibration test bench. The first interaction end of the TCU is electrically connected with the interaction end of the gear shifting execution mechanism, and the second interaction end of the TCU is electrically connected with the interaction end of the upper computer. The TCU is used for controlling an electromagnetic valve in the gear shifting execution mechanism to work according to a command sent by the upper computer and a preset control flow, judging whether the gear shifting execution mechanism works normally or not according to a received air cylinder displacement signal sent by a displacement sensor in the gear shifting execution mechanism, and sending a judgment result to the upper computer; and the upper computer is used for sending a test command of the gear shifting execution mechanism to the TCU and displaying a judgment result sent by the TCU. The device can be applied to the vibration test of the gear-shifting execution mechanism of the small vibration table, and the reliability of the gear-shifting execution mechanism is verified.

Description

Technical Field

[0001] The present invention relates to a vibration testing system and method, and in particular to a vibration testing system for a pneumatic shift actuator of an AMT for commercial vehicles and a method based on the system. Background Art

[0002] AMT is a transmission device that can automatically shift gears according to the vehicle's operating status and the road environment. With the popularization of AMT on domestic commercial vehicles, the use of the AMT system has greatly reduced the driver's operating intensity. However, the operating conditions of commercial vehicles are complex and changeable. Resonance is inevitable during operation. When combined with the vibration acceleration caused by the gear shift impact, the vibration acceleration actually borne by the gear shift actuator is immeasurable, which seriously affects the driving performance of the AMT.

[0003] At present, there are few vibration test schemes for AMT shift actuators, which are mainly matched with the transmission as a whole to conduct vehicle vibration testing and strength verification. This method takes a long time to test, occupies a lot of resources, is difficult to follow the vehicle, and is expensive. Secondly, installing the shift actuator on the gearbox for assembly vibration testing occupies a large space, has high requirements for the vibration table, and consumes a lot of resources. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems of the existing vibration testing method of the AMT shift actuator, such as long testing time, high resource occupation, great difficulty in following vehicle detection, high testing cost, large testing space occupation and high requirements for the vibration table, and to provide a vibration testing system and method for the AMT pneumatic shift actuator of a commercial vehicle.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A vibration test system for commercial vehicle AMT pneumatic shift actuator, which is special in that:

[0007] Including shift actuator, vibration test bench, TCU and host computer;

[0008] The shift actuator is installed on a vibration test bench;

[0009] The first interactive end of the TCU is electrically connected to the interactive end of the shift actuator, and the second interactive end is electrically connected to the interactive end of the host computer;

[0010] The TCU is used to control the solenoid valve in the shift actuator to work according to the command sent by the host computer and the preset control process, thereby controlling the cylinder to move, and judge whether the shift actuator works normally according to the cylinder displacement signal sent by the displacement sensor in the shift actuator, and send the judgment result to the host computer;

[0011] The host computer is used to send a shift actuator test command to the TCU and display the determination result sent by the TCU.

[0012] Furthermore, the first interactive end of the TCU is electrically connected to the interactive end of the shift actuator through the control harness assembly, and the second interactive end is electrically connected to the interactive end of the host computer through the CAN line.

[0013] Furthermore, the host computer is equipped with a diagnostic tool, and the host computer sends a shift actuator test command to the TCU through the diagnostic tool.

[0014] At the same time, the present invention also provides a vibration test method for a commercial vehicle AMT pneumatic shift actuator, based on the aforementioned vibration test system for a commercial vehicle AMT pneumatic shift actuator, which is special in that it includes the following steps:

[0015] Step 1: Send a shift actuator test command to the TCU through the host computer;

[0016] Step 2: The TCU receives a command from the host computer and controls the solenoid valve in the shift actuator to work according to a preset control process, thereby controlling the cylinder to move. During this process, the displacement sensor in the shift actuator detects the displacement signal of the cylinder and sends it to the TCU;

[0017] Step 3: The TCU determines whether the shift actuator is operating normally based on the cylinder displacement signal received from the displacement sensor in the shift actuator, and sends the determination result to the host computer;

[0018] Step 4: Display the judgment result through the host computer.

[0019] Furthermore, in step 2, the preset control process is specifically as follows:

[0020] K1, open the 1st gear solenoid valve for the first preset time, and then close it for the second preset time;

[0021] K2, open the 1st gear solenoid valve and the 2nd gear solenoid valve for the second preset time, and then close them for the second preset time;

[0022] K3, open the 2nd gear solenoid valve for the first preset time, and then close it for the second preset time;

[0023] K4, open the 1st gear solenoid valve and the 2nd gear solenoid valve simultaneously for the second preset time, and then close for the second preset time;

[0024] K5, and so on, after opening the N-1 gear solenoid valve for the first preset time, it is closed for the second preset time; N is an even number greater than 3;

[0025] K6, open the N-1 gear solenoid valve and the N gear solenoid valve for the second preset time, and then close them for the second preset time;

[0026] K7, open the N gear solenoid valve for the first preset time, and then close it for the second preset time;

[0027] K8. After the N-1 gear solenoid valve and the N gear solenoid valve are opened for the second preset time, they are closed for the second preset time.

[0028] Furthermore, in step 3, the TCU determines whether the shift actuator works normally according to the displacement signal received from the displacement sensor in the shift actuator in the following manner:

[0029] If the cylinder displacement is 11.5±0.5mm after the 1st gear solenoid valve is opened for the first preset time, the cylinder displacement is -11.5±0.5mm after the 2nd gear solenoid valve is opened for the first preset time, the cylinder displacement is 0±0.5mm after the 1st gear solenoid valve and the 2nd gear solenoid valve are opened for the second preset time, the cylinder displacement is 11.5±0.5mm after the 3rd gear solenoid valve is opened for the first preset time, and the cylinder displacement is -11.5±0.5mm after the 4th gear solenoid valve is opened for the first preset time, the 3rd gear solenoid valve and the 4th gear solenoid valve are opened for the first preset time. After the N-1 gear solenoid valves are opened for the second preset time, the cylinder displacement is 0±0.5mm. Similarly, after the N-1 gear solenoid valves are opened for the first preset time, the cylinder displacement is 11.5±0.5mm. After the N gear solenoid valves are opened for the first preset time, the cylinder displacement is -11.5±0.5mm. After the N-1 gear solenoid valves and the N gear solenoid valves are opened for the second preset time, the cylinder displacement is 0±0.5mm. The shift actuator is in a normal working state; otherwise, the shift actuator is in an abnormal working state.

[0030] Furthermore, the first preset time is 1.5s, and the second preset time is 1s.

[0031] Further, the gear shift actuator is a 6-speed gear shift actuator;

[0032] The preset control process is specifically as follows:

[0033] K1, open the first gear solenoid valve for 1.5s and then close it for 1s;

[0034] K2, open the 1st gear solenoid valve and the 2nd gear solenoid valve at the same time for 1 second and then close for 1 second;

[0035] K3, open the 2nd gear solenoid valve for 1.5s and then close it for 1s;

[0036] K4, open the 1st gear solenoid valve and the 2nd gear solenoid valve at the same time for 1 second and then close for 1 second;

[0037] K5, open the 3rd gear solenoid valve for 1.5 seconds and then close it for 1 second;

[0038] K6, open the 3rd gear solenoid valve and the 4th gear solenoid valve at the same time for 1 second and then close for 1 second;

[0039] K7, open the 4th gear solenoid valve for 1.5 seconds and then close it for 1 second;

[0040] K8, open the 3rd gear solenoid valve and the 4th gear solenoid valve at the same time for 1 second and then close them for 1 second;

[0041] K9, open the 5th gear solenoid valve for 1.5 seconds and then close it for 1 second;

[0042] K10, open the 5th gear solenoid valve and the 6th gear solenoid valve at the same time for 1 second and then close for 1 second;

[0043] K11, open the 6th gear solenoid valve for 1.5 seconds and then close it for 1 second;

[0044] K12, open the 5th gear solenoid valve and the 6th gear solenoid valve at the same time for 1 second and then close for 1 second.

[0045] Furthermore, in step 3, the TCU determines whether the shift actuator works normally according to the displacement signal received from the displacement sensor in the shift actuator in the following manner:

[0046] If the cylinder displacement is 11.5±0.5mm 1.5s after the 1st gear solenoid valve is opened, the displacement is -11.5±0.5mm 1.5s after the 2nd gear solenoid valve is opened, the cylinder displacement is 0±0.5mm 1.5s after the 1st gear solenoid valve and the 2nd gear solenoid valve are opened simultaneously for 1s, the cylinder displacement is 11.5±0.5mm 1.5s after the 3rd gear solenoid valve is opened, the cylinder displacement is -11.5±0.5mm 1.5s after the 4th gear solenoid valve is opened, the cylinder displacement is 0±0.5mm 1.5s after the 3rd gear solenoid valve and the 4th gear solenoid valve are opened simultaneously for 1s, the cylinder displacement is 11.5±0.5mm 1.5s after the 5th gear solenoid valve is opened, the cylinder displacement is -11.5±0.5mm 1.5s after the 6th gear solenoid valve is opened, and the cylinder displacement is 0±0.5mm 1.5s after the 5th gear solenoid valve and the 6th gear solenoid valve are opened simultaneously for 1s, then the shift actuator is in a normal working state; otherwise, the shift actuator is in an abnormal working state.

[0047] The beneficial effects of the present invention are:

[0048] The present invention comprises a shift actuator, a TCU, a vibration test bench and a host computer to form a vibration test system for a pneumatic shift actuator of an AMT for commercial vehicles. The system can be applied to a vibration test of the shift actuator on a small vibration table, thereby verifying the reliability of the shift actuator and achieving the purpose of completing the vibration test of the pneumatic shift actuator of the AMT for commercial vehicles quickly, efficiently and at a relatively low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1It is a structural schematic diagram of an embodiment of a vibration test system for a pneumatic shift actuator of an AMT for commercial vehicles of the present invention. DETAILED DESCRIPTION

[0050] In order to make the purpose, advantages and features of the present invention clearer, the vibration testing system and method of the pneumatic shift actuator of a commercial vehicle AMT proposed by the present invention are further described in detail in combination with the drawings and specific embodiments. According to the following specific implementation methods, the advantages and features of the present invention will be clearer. It should be noted that: the drawings are all in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention; secondly, the structure shown in the drawings is often part of the actual structure.

[0051] See also Figure 1 The present embodiment provides a vibration test system for a pneumatic shift actuator of an AMT for a commercial vehicle, which mainly includes a shift actuator, a test fixture, a vibration test bench, a TCU (transmission control unit) and a host computer.

[0052] The shift actuator is fixed on the test fixture by bolts and fixed on the vibration test bench.

[0053] The solenoid valve, displacement sensor, etc. in the shift actuator are electrically connected through the control harness assembly, and then the control harness assembly is plugged into the TCU, and a clean dry air source of 8±0.5Bar is provided to the shift actuator and a working voltage of 24±2V is provided to the TCU to meet its normal working needs.

[0054] The main function of TCU is: according to the command sent by the host computer, it controls the operation of the solenoid valve in the shift actuator according to the preset control process, thereby controlling the displacement of the cylinder, and judging whether the shift actuator is working normally according to the cylinder displacement signal sent by the displacement sensor in the shift actuator, and sending the judgment result to the host computer.

[0055] The host computer is equipped with a diagnostic tool, and is electrically connected to the TCU via the CAN bus. The diagnostic tool sends a command for testing the shift actuator to the TCU. At the same time, the host computer displays the judgment results sent by the TCU. During the entire test cycle, the experimenter regularly judges whether the shift actuator is working normally based on the judgment results displayed on the host computer.

[0056] The present embodiment provides a vibration test method for a pneumatic shift actuator of an AMT for a commercial vehicle, comprising the following steps:

[0057] Step 1: Send a shift actuator test command to the TCU through the host computer;

[0058] Step 2: The TCU receives a command from the host computer and controls the solenoid valve in the shift actuator to work according to a preset control process. The preset control process is as follows:

[0059] K1, open the 1st gear solenoid valve for the first preset time, and then close it for the second preset time;

[0060] K2, open the 1st gear solenoid valve and the 2nd gear solenoid valve for the second preset time, and then close them for the second preset time;

[0061] K3, open the 2nd gear solenoid valve for the first preset time, and then close it for the second preset time;

[0062] K4, open the 1st gear solenoid valve and the 2nd gear solenoid valve simultaneously for the second preset time, and then close for the second preset time;

[0063] K5, and so on, after opening the N-1 gear solenoid valve for the first preset time, it is closed for the second preset time; N is an even number greater than 3;

[0064] K6, open the N-1 gear solenoid valve and the N gear solenoid valve for the second preset time, and then close them for the second preset time;

[0065] K7, open the N gear solenoid valve for the first preset time, and then close it for the second preset time;

[0066] K8. After the N-1 gear solenoid valve and the N gear solenoid valve are opened for the second preset time, they are closed for the second preset time.

[0067] The following is an example of the 6-speed shift actuator in the shift actuator to illustrate the above control process;

[0068] The first preset time in this embodiment is 1.5 s, and the second preset time in this embodiment is 1 s.

[0069] K1, open the first gear solenoid valve for 1.5s and then close it for 1s;

[0070] K2, open the 1st gear solenoid valve and the 2nd gear solenoid valve at the same time for 1 second and then close for 1 second;

[0071] K3, open the 2nd gear solenoid valve for 1.5s and then close it for 1s;

[0072] K4, open the 1st gear solenoid valve and the 2nd gear solenoid valve at the same time for 1 second and then close for 1 second;

[0073] K5, open the 3rd gear solenoid valve for 1.5 seconds and then close it for 1 second;

[0074] K6, open the 3rd gear solenoid valve and the 4th gear solenoid valve at the same time for 1 second and then close for 1 second;

[0075] K7, open the 4th gear solenoid valve for 1.5 seconds and then close it for 1 second;

[0076] K8, open the 3rd gear solenoid valve and the 4th gear solenoid valve at the same time for 1 second and then close them for 1 second;

[0077] K9, open the 5th gear solenoid valve for 1.5 seconds and then close it for 1 second;

[0078] K10, open the 5th gear solenoid valve and the 6th gear solenoid valve at the same time for 1 second and then close for 1 second;

[0079] K11, open the 6th gear solenoid valve for 1.5 seconds and then close it for 1 second;

[0080] K12, open the 5th gear solenoid valve and the 6th gear solenoid valve at the same time for 1 second and then close for 1 second.

[0081] In other embodiments of the present invention, the shift actuators of other gear numbers may be tested in the above manner.

[0082] During the execution of the above control process, the displacement signal of the cylinder is detected by the displacement sensor in the shift actuator and sent to the TCU.

[0083] Step 3: The TCU determines whether the shift actuator is working normally according to the cylinder displacement signal received from the displacement sensor in the shift actuator in the following way:

[0084] If the cylinder displacement is 11.5±0.5mm 1.5s after the 1st gear solenoid valve is opened, the cylinder displacement is -11.5±0.5mm 1.5s after the 2nd gear solenoid valve is opened, the cylinder displacement is 0±0.5mm 1.5s after the 1st gear solenoid valve and the 2nd gear solenoid valve are opened simultaneously for 1s, the cylinder displacement is 11.5±0.5mm 1.5s after the 3rd gear solenoid valve is opened, the cylinder displacement is -11.5±0.5mm 1.5s after the 4th gear solenoid valve is opened, the cylinder displacement is 0±0.5mm 1.5s after the 3rd gear solenoid valve and the 4th gear solenoid valve are opened simultaneously for 1s, the cylinder displacement is 11.5±0.5mm 1.5s after the 5th gear solenoid valve is opened, the cylinder displacement is -11.5±0.5mm 1.5s after the 6th gear solenoid valve is opened, and the cylinder displacement is 0±0.5mm 1.5s after the 5th gear solenoid valve and the 6th gear solenoid valve are opened simultaneously for 1s, then the shift actuator is in a normal working state; otherwise, the shift actuator is in an abnormal working state.

[0085] Then, the judgment result that the shift actuator is in a normal working state or the shift actuator is in an abnormal working state is sent to the host computer.

[0086] Step 4: Display the judgment results through the host computer, so that the experimenters can check them regularly.

Claims

1. A vibration test system for a pneumatic shift actuator of an AMT for commercial vehicles, characterized by: Including vibration test bench, TCU and host computer; The gear shift actuator to be tested is installed on a vibration test bench; The first interactive end of the TCU is electrically connected to the interactive end of the shift actuator, and the second interactive end is electrically connected to the interactive end of the host computer; The TCU is used to control the solenoid valve in the shift actuator to work according to the command sent by the host computer and the preset control process, thereby controlling the cylinder to move, and judge whether the shift actuator works normally according to the cylinder displacement signal sent by the displacement sensor in the shift actuator, and send the judgment result to the host computer; The host computer is used to send a shift actuator test command to the TCU and display the determination result sent by the TCU.

2. The vibration test system for the pneumatic shift actuator of an AMT for commercial vehicles according to claim 1 is characterized in that: The first interactive end of the TCU is electrically connected to the interactive end of the shift actuator through a control harness assembly, and the second interactive end is electrically connected to the interactive end of the host computer through a CAN line.

3. A vibration test system for a commercial vehicle AMT pneumatic shift actuator according to claim 1 or 2, characterized in that: The host computer is equipped with a diagnostic tool, and the host computer sends a shift actuator test command to the TCU through the diagnostic tool.

4. The vibration test system for the pneumatic shift actuator of an AMT for commercial vehicles according to claim 3 is characterized in that: The gear shift actuator to be tested is installed on the vibration test bench through the test fixture.

5. A vibration test method for a pneumatic shift actuator of an AMT for commercial vehicles, based on a vibration test system for a pneumatic shift actuator of an AMT for commercial vehicles according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Send a shift actuator test command to the TCU through the host computer; Step 2: The TCU receives a command from the host computer and controls the solenoid valve in the shift actuator to work according to a preset control process, thereby controlling the cylinder to move. During this process, the displacement sensor in the shift actuator detects the displacement signal of the cylinder and sends it to the TCU; Step 3: The TCU determines whether the shift actuator is operating normally based on the cylinder displacement signal received from the displacement sensor in the shift actuator, and sends the determination result to the host computer; Step 4: Display the judgment result through the host computer.

6. A vibration test method for a commercial vehicle AMT pneumatic shift actuator according to claim 5, characterized in that: In step 2, the preset control process is specifically as follows: K1, open the 1st gear solenoid valve for the first preset time, and then close it for the second preset time; K2, open the 1st gear solenoid valve and the 2nd gear solenoid valve for the second preset time, and then close them for the second preset time; K3, open the 2nd gear solenoid valve for the first preset time, and then close it for the second preset time; K4, open the 1st gear solenoid valve and the 2nd gear solenoid valve simultaneously for the second preset time, and then close for the second preset time; K5, and so on, after opening the N-1 gear solenoid valve for the first preset time, it is closed for the second preset time; N is an even number greater than 3; K6, open the N-1 gear solenoid valve and the N gear solenoid valve for the second preset time, and then close them for the second preset time; K7, open the N gear solenoid valve for the first preset time, and then close it for the second preset time; K8. After the N-1 gear solenoid valve and the N gear solenoid valve are opened for the second preset time, they are closed for the second preset time.

7. A vibration testing method for a pneumatic shift actuator of an AMT for commercial vehicles according to claim 6, characterized in that: In step 3, the TCU determines whether the shift actuator works normally according to the displacement signal received from the displacement sensor in the shift actuator in the following way: If the cylinder displacement is 11.5±0.5mm after the 1st gear solenoid valve is opened for the first preset time, the cylinder displacement is -11.5±0.5mm after the 2nd gear solenoid valve is opened for the first preset time, the cylinder displacement is 0±0.5mm after the 1st gear solenoid valve and the 2nd gear solenoid valve are opened for the second preset time, the cylinder displacement is 11.5±0.5mm after the 3rd gear solenoid valve is opened for the first preset time, the cylinder displacement is -11.5±0.5mm after the 4th gear solenoid valve is opened for the first preset time, and the cylinder displacement is 0±0.5mm after the 3rd gear solenoid valve and the 4th gear solenoid valve are opened for the second preset time. 0.5mm, and so on, after the N-1 gear solenoid valve is opened for the first preset time, the cylinder displacement is 11.5± 0.5mm, the cylinder displacement is -11.5±0.5mm after the N gear solenoid valve is opened for the first preset time, and the cylinder displacement is 0±0.5mm after the N-1 gear solenoid valve and the N gear solenoid valve are opened at the same time for the second preset time, then the shift actuator is in a normal working state; otherwise, the shift actuator is in an abnormal working state.

8. The vibration testing method for a pneumatic shift actuator of an AMT for commercial vehicles according to claim 7, characterized in that: The first preset time is 1.5s, and the second preset time is 1s.

9. A vibration test method for a commercial vehicle AMT pneumatic shift actuator according to claim 8, characterized in that: The shift actuator is a 6-speed shift actuator; The preset control process is specifically as follows: K1, open the first gear solenoid valve for 1.5s and then close it for 1s; K2, open the 1st gear solenoid valve and the 2nd gear solenoid valve at the same time for 1 second and then close for 1 second; K3, open the 2nd gear solenoid valve for 1.5s and then close it for 1s; K4, open the 1st gear solenoid valve and the 2nd gear solenoid valve at the same time for 1 second and then close for 1 second; K5, open the 3rd gear solenoid valve for 1.5 seconds and then close it for 1 second; K6, open the 3rd gear solenoid valve and the 4th gear solenoid valve at the same time for 1 second and then close for 1 second; K7, open the 4th gear solenoid valve for 1.5 seconds and then close it for 1 second; K8, open the 3rd gear solenoid valve and the 4th gear solenoid valve at the same time for 1 second and then close them for 1 second; K9, open the 5th gear solenoid valve for 1.5 seconds and then close it for 1 second; K10, open the 5th gear solenoid valve and the 6th gear solenoid valve at the same time for 1 second and then close for 1 second; K11, open the 6th gear solenoid valve for 1.5 seconds and then close it for 1 second; K12, open the 5th gear solenoid valve and the 6th gear solenoid valve at the same time for 1 second and then close for 1 second.

10. A vibration test method for a commercial vehicle AMT pneumatic shift actuator according to claim 9, characterized in that: In step 3, the TCU determines whether the shift actuator works normally according to the displacement signal received from the displacement sensor in the shift actuator in the following way: If the cylinder displacement is 11.5±0.5mm 1.5s after the 1st gear solenoid valve is opened, the displacement is -11.5±0.5mm 1.5s after the 2nd gear solenoid valve is opened, the cylinder displacement is 0±0.5mm 1.5s after the 1st gear solenoid valve and the 2nd gear solenoid valve are opened simultaneously for 1s, the cylinder displacement is 11.5±0.5mm 1.5s after the 3rd gear solenoid valve is opened, the cylinder displacement is -11.5±0.5mm 1.5s after the 4th gear solenoid valve is opened, the cylinder displacement is 0±0.5mm 1.5s after the 3rd gear solenoid valve and the 4th gear solenoid valve are opened simultaneously for 1s, the cylinder displacement is 11.5±0.5mm 1.5s after the 5th gear solenoid valve is opened, the cylinder displacement is -11.5±0.5mm 1.5s after the 6th gear solenoid valve is opened, and the cylinder displacement is 0±0.5mm 1.5s after the 5th gear solenoid valve and the 6th gear solenoid valve are opened simultaneously for 1s, then the shift actuator is in a normal working state; otherwise, the shift actuator is in an abnormal working state.

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