Test bed and test method for dynamically testing gear selecting and shifting performance

Abstract

The invention provides a dynamic test gear selecting and shifting performance test bench and a test method, and belongs to the technical field of gearbox testing, the test bench comprises a motor, a flywheel and clutch assembly, a clutch pump, a clutch pedal, a gear selecting and shifting flexible shaft, a gear shifting performance tester, a computer and a motor controller. According to the invention, the driving condition of the whole vehicle can be simulated, and the index data of the dynamic gear shifting performance can be read from the gear shifting performance tester in the upshift and downshift process of each gear, so that the maneuverability of the whole vehicle can be evaluated, the gear selecting and shifting performance of a gearbox can be optimized, and the requirements of a whole vehicle factory and a user on the maneuverability of the whole vehicle can be met.

Description

Technical Field

[0001] The invention belongs to the technical field of gearbox testing, and specifically discloses a dynamic testing gear selection and shifting performance test bench and a testing method. Background Art

[0002] Nowadays, vehicle manufacturers and users have greatly increased their requirements for vehicle handling performance, and gearbox shifting performance has become a very important indicator of gearbox quality. Therefore, it is very important to simulate and test the corresponding vehicle dynamic shifting performance in advance for different models. The gearbox handling performance can also be optimized based on the test results, so as to successfully pass the vehicle prototype review.

[0003] The existing test bench can only test the static gear selection and shifting performance, but cannot test the dynamic gear shifting performance. If you want to test it, you need a professional large test bench or install it on a whole vehicle. The installation process is complicated and the cost is high. Therefore, it is very necessary to design a complete set of simple dynamic test gear selection and shifting performance test bench and test method. Summary of the invention

[0004] The present invention provides a dynamic test shifting performance test bench and test method, which can simulate the driving condition of a whole vehicle, read the dynamic shifting performance index data from the shifting performance tester during the upshifting and downshifting process of each gear, thereby evaluating the whole vehicle handling performance, optimizing the gearbox shifting performance, and meeting the requirements of vehicle manufacturers and users for the whole vehicle handling performance.

[0005] The invention provides a dynamic test shift performance test bench, comprising a motor, a flywheel and a clutch assembly, a clutch pump, a clutch pedal, a shift soft shaft, a shift performance tester, a computer and a motor controller; the output shaft of the motor is connected to the output shaft of a gearbox to be tested; the flywheel and the clutch assembly are connected to the input shaft of the gearbox to be tested; the output end of the clutch pump is connected to the separation fork of the gearbox to be tested; the clutch pedal is connected to the input end of the clutch pump; the input end of the shift performance tester is connected to the shift rocker arm of the gearbox to be tested through the shift soft shaft, and the output end of the shift performance tester is connected to the input end of the computer; the input end of the motor controller is connected to the output end of the computer, and the output end of the motor controller is connected to the control end of the motor.

[0006] In the above-mentioned dynamic test shift performance test bench, the output shaft of the motor is connected to the output shaft of the gearbox to be tested through a transmission shaft.

[0007] The present invention provides a dynamic test method for gear selection and shifting performance, which uses the above-mentioned dynamic test method for gear selection and shifting performance test bench to test the gearbox to be tested, comprising the following steps:

[0008] S1, before testing, the engine speed and torque of each gear of the vehicle are input into the motor controller;

[0009] S2, the computer controls the motor controller to drive the motor to rotate according to the engine speed and torque of each gear of the whole vehicle, so that the motor simulates the corresponding speed and torque, and the gearbox to be tested shifts at the corresponding speed and torque. When shifting gears, the clutch pedal is controlled to realize the connection and disconnection between the flywheel and the clutch assembly and the gearbox to be tested. The gear shift performance tester tests the gear shift force, synchronization impulse, and synchronization time of the gearbox to be tested at each gear by selecting the gear shift soft shaft, and transmits the test value to the computer. The computer sends a signal to the motor controller according to the test value of the gear shift performance tester, and the motor controller controls the speed and torque of the motor, so as to realize that the motor speed and torque before and after the gear shift meet the driving conditions of the whole vehicle;

[0010] S3, based on the performance data and curve graphs of the shifting force, synchronization impulse and synchronization time collected by the shifting performance tester during the shifting process, the gear selection and shifting operation performance of the gearbox to be tested is evaluated through index comparison and subjective feeling.

[0011] Compared with the prior art, the present invention has the following beneficial effects.

[0012] The present invention can effectively solve the problem of difficulty in testing the dynamic gear selection and shifting performance of various gearboxes. The test bench can conveniently, quickly and accurately test the gearbox handling performance, simulate the driving conditions of the whole vehicle, adjust the motor speed and torque during the upshift and downshift process, and read various performance data from the gear shifting performance tester, so as to judge the quality of the whole vehicle handling performance, and optimize the gearbox selection and shifting performance according to the test results to meet the whole vehicle handling performance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 Schematic diagram of the gear shift performance test bench selected for dynamic testing.

[0015] In the figure: 1. Motor; 2. Flywheel and clutch assembly; 3. Clutch pump; 4. Clutch pedal; 5. Shifting flexible shaft; 6. Shifting performance tester; 7. Computer; 8. Motor controller; 9. Drive shaft; 100. Gearbox to be tested. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] Example 1

[0018] The present embodiment provides a dynamic test shift performance test bench, comprising a motor 1, a flywheel and clutch assembly 2, a clutch pump 3, a clutch pedal 4, a shift soft shaft 5, a shift performance tester 6, a computer 7 and a motor controller 8; the output shaft of the motor 1 is connected to the output shaft of the gearbox 100 to be tested; the flywheel and clutch assembly 2 is connected to the input shaft of the gearbox 100 to be tested; the output end of the clutch pump 3 is connected to the release fork of the gearbox 100 to be tested; the clutch pedal 4 is connected to the input end of the clutch pump 3, and is used to control the opening and closing of the clutch pump 3; the input end of the shift performance tester 6 is connected to the shift rocker arm of the gearbox 100 to be tested through the shift soft shaft 5, and the output end of the shift performance tester 6 is connected to the input end of the computer 7, and the shift performance tester 6 can transmit the test data to the computer 7; the input end of the motor controller 8 is connected to the output end of the computer 7, and the output end of the motor controller 8 is connected to the control end of the motor 1, and the motor controller 8 is used to control the motor 1.

[0019] In the above-mentioned dynamic test shift performance test bench, the output shaft of the motor 1 is connected to the output shaft of the gearbox 100 to be tested through the transmission shaft 9 .

[0020] Example 2

[0021] This embodiment provides a dynamic test method for gear selection and shifting performance, which uses the above-mentioned dynamic test bench for gear selection and shifting performance to test the gearbox to be tested, including the following steps:

[0022] S1, before testing, the engine speed and torque of each gear of the vehicle are input into the motor controller 8;

[0023] S2, the computer 7 controls the motor controller 8 to drive the motor 1 to rotate according to the engine speed and torque of each gear of the whole vehicle, so that the motor 1 simulates the corresponding speed and torque, and the gearbox 100 to be tested shifts at the corresponding speed and torque. When shifting gears, the clutch pedal 4 is controlled to realize the connection and disconnection between the clutch in the flywheel and clutch assembly 2 and the gearbox 100 to be tested. The gear shift performance tester 6 tests the shift force, synchronization impulse, and synchronization time of the gearbox 100 to be tested at each gear by selecting the gear shift soft shaft 5, and transmits the test value to the computer 7. The computer 7 sends a signal to the motor controller 8 according to the test value of the gear shift performance tester 6. The motor controller 8 controls the speed and torque of the motor 1, so as to realize that the speed and torque of the motor 1 before and after the gear shift meet the driving conditions of the whole vehicle;

[0024] S3, based on the performance data and curves of the shifting force, synchronization impulse and synchronization time collected by the shifting performance tester 6 during the shifting process, the gear selection and shifting operation performance of the gearbox to be tested is evaluated through index comparison and subjective feeling. If it does not meet the requirements of the whole vehicle, it can be optimized and improved based on data analysis to ultimately meet the requirements of the vehicle manufacturer and users.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 dynamic test shift performance test bench, comprising a motor, a flywheel and a clutch assembly, a clutch pump, a clutch pedal, a shift flexible shaft, a shift performance tester, a computer and a motor controller; It is characterized in that The output shaft of the motor is connected to the output shaft of the gearbox to be tested; The flywheel and clutch assembly are connected to the input shaft of the gearbox to be tested; The output end of the clutch pump is connected to the release fork of the gearbox to be tested; The clutch pedal is connected to the input end of the clutch pump; The input end of the gear shift performance tester is connected to the gear shift rocker arm of the gearbox to be tested through the gear shift flexible shaft, and the output end of the gear shift performance tester is connected to the input end of the computer; The input end of the motor controller is connected to the output end of the computer, and the output end of the motor controller is connected to the control end of the motor.

2. The dynamic test shift performance test bench according to claim 1, characterized in that: The output shaft of the motor is connected to the output shaft of the gearbox to be tested through a transmission shaft.

3. A dynamic test method for gear selection and shifting performance, characterized in that: The dynamic test gear selection and shifting performance test bench according to claim 1 or 2 is used to test the gearbox to be tested, comprising the following steps: S1, before testing, the engine speed and torque of each gear of the vehicle are input into the motor controller; S2, the computer controls the motor controller to drive the motor to rotate according to the engine speed and torque of each gear of the whole vehicle, so that the motor simulates the corresponding speed and torque, and the gearbox to be tested shifts at the corresponding speed and torque. When shifting gears, the clutch pedal is controlled to realize the connection and disconnection between the flywheel and the clutch assembly and the gearbox to be tested. The gear shift performance tester tests the gear shift force, synchronization impulse, and synchronization time of the gearbox to be tested at each gear by selecting the gear shift soft shaft, and transmits the test value to the computer. The computer sends a signal to the motor controller according to the test value of the gear shift performance tester, and the motor controller controls the speed and torque of the motor, so as to realize that the motor speed and torque before and after the gear shift meet the driving conditions of the whole vehicle; S3, based on the performance data and curve graphs of the shifting force, synchronization impulse and synchronization time collected by the shifting performance tester during the shifting process, the gear selection and shifting operation performance of the gearbox to be tested is evaluated through index comparison and subjective feeling.

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