Clutch fill control of an automatic transmission for heavy-duty vehicle applications

A mathematical model and dynamic characteristics simulation model were established based on working principle of stationary combination valve in order to study shift quality of heavy-duty vehicle automatic transmission. Various parameters on buffer characteristics influence and outer diameter of the clutch hydraulic cylinder, the spring stiffness and preload influenced on the buffer time, starting pressure and termination pressure were gained with using batch function. The results show that the smaller the orifice diameter, spring stiffness and preload is, the longer the buffer time is, and the curve of buffer characteristic is downward translation. The larger the outer diameter of the clutch hydraulic cylinder, spring stiffness and preload is, the shorter the buffer time is, while the initial pressure and the termination pressure are relatively lower.

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Down shift control with power of planetary-type automatic transmission for a heavy-duty vehicle

Mechanical Systems and Signal Processing ◽

10.1016/j.ymssp.2021.107828 ◽

2021 ◽

Vol 159 ◽

pp. 107828

Author(s):

Erlie Wang ◽

Fei Meng

Keyword(s):

Automatic Transmission ◽

Heavy Duty ◽

Shift Control ◽

Heavy Duty Vehicle

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Shift Control System of Heavy-duty Vehicle Automatic Transmission

Journal of Networks ◽

10.4304/jnw.8.12.2948-2955 ◽

2013 ◽

Vol 8 (12) ◽

Cited By ~ 1

Author(s):

Yan Zhang ◽

Wenxing Ma ◽

Xuesong Li

Keyword(s):

Control System ◽

Automatic Transmission ◽

Heavy Duty ◽

Shift Control ◽

Heavy Duty Vehicle

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Shift Quality Analysis of Heavy-Duty Vehicle Automatic Transmission Shift Control Valve

The Open Mechanical Engineering Journal ◽

10.2174/1874155x01509010333 ◽

2015 ◽

Vol 9 (1) ◽

pp. 333-338 ◽

Cited By ~ 1

Author(s):

Ma Wenxing ◽

Zhang Yan ◽

Wang Ruoyang ◽

Lu Xiuquan

Keyword(s):

Automatic Transmission ◽

Solenoid Valve ◽

Simulation Software ◽

Quality Analysis ◽

Bench Test ◽

Heavy Duty ◽

Shift Quality ◽

Shift Control ◽

Heavy Duty Vehicle ◽

Proportional Solenoid Valve

The structural concepts of Switch solenoid valve and proportional solenoid valve were proposed for the hydraulic shift control system of some hydrodynamic mechanical automatic transmissions. Shift oil pressure of stationary combination valve and proportional solenoid valve was modeled, simulated, contrasted and analyzed by dynamic simulation software in order to study the shift quality of heavy-duty vehicle automatic transmission. The results show that proportional solenoid valve is better to control the characteristic of shift oil pressure, reduce shift shock, improve shift quality and comfort than stationary combination valve. The correctness and validity of the model were verified through bench test, which reflected the dynamic characteristics of shift oil pressure of hydrodynamic mechanical automatic transmission. The results can be used to match the performance and predict heavy-duty vehicle shifting process, and to further lay the foundation for the enhancement of shift performance of the system.

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