Testing system and method of high-power automatic transmission control strategy

Abstract

The invention discloses a testing system of a high-power automatic transmission control strategy. The system comprises a control system, a fixing rack, a variable-frequency motor, a high-power automatic transmission and an electric power loading device, wherein the electric power loading device is in transmission connection with an output of the high-power automatic transmission; torque and rotation speed sensors are arranged between the variable-frequency motor and the high-power automatic transmission and between the high-power automatic transmission and the electric power loading device respectively; and the torque and rotation speed sensors, the variable-frequency motor, the high-power automatic transmission and the electric power loading device are connected with the control system respectively. At the same time, the invention further discloses a testing method using the testing system, a power device is the variable-frequency motor, an engine is not taken as a power source, the variable-frequency motor can realize constant rotation speed control and constant torque control and is easy to control; accurate control of control strategies such as shift rules and the like can be realized, and parameter correction is facilitated.

Description

technical field [0001] The invention relates to the technical field of mechanical transmission, in particular to a test system and a test method for a control strategy of a high-power automatic transmission. Background technique [0002] High-power hydraulic mechanical high-power automatic transmission is an important aspect in the field of vehicle transmission technology in my country. The level of high-power automatic transmission depends largely on the performance of the control system. Compared with other types of transmissions, high-power hydraulic mechanical The working conditions of the type high-power automatic transmission are more complicated, so its control is more difficult, and the quality of the control strategy has a crucial impact on various performances of the vehicle. [0003] The performance of the control strategy is generally tested first through bench tests. However, since the power source of the traditional test bench is an engine and the loading device...

AI Technical Summary

Problems solved by technology

[0003] The performance of the control strategy is generally tested first through bench tests. However, since the power source of the traditional test bench is an engine and the loading device is a hydraulic system, the engine speed fluctuates greatly during the test, and the loading accuracy of the hydraulic loading device is low. Especially when the throttle opening of the engine changes greatly, it will cause large fluctuations in the speed and load of the entire test system, which is extremely unfavorable for the control strategy test. Therefore, in order to improve the accuracy and efficiency of the control strategy test, It is necessary to adopt a high-power automatic transmission shift control strategy test system with higher precision and easier control

[0004] The power source of the existing automatic transmission performance testing device and test method also uses a variable frequency speed regulating motor, but its test method is not suitable for the test of high-power automatic transmission. The main reasons are as follows: First, its test device is mobile, It is not suitable for testing high-power automatic transmissions. Second, the loading device is a magnetic powder loader. For high-power automatic transmissions, its loading capacity is far from enough. Third, its data collector only collects test data for high-power automatic transmissions. Fourth, there is no setting Speed ​​and torque sensors, incomplete data collection during performance testing of high-power automatic transmissions

Images