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

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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Mode Shift Control for a Hybrid Heavy-Duty Vehicle with Power-Split Transmission

Energies ◽

10.3390/en10020177 ◽

2017 ◽

Vol 10 (2) ◽

pp. 177 ◽

Cited By ~ 12

Author(s):

Kun Huang ◽

Changle Xiang ◽

Yue Ma ◽

Weida Wang ◽

Reza Langari

Keyword(s):

Heavy Duty ◽

Mode Shift ◽

Shift Control ◽

Heavy Duty Vehicle ◽

Power Split

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Modeling and Parameter Estimation of Automatic Transmission for Heavy-Duty Vehicle Using Dual Clutch Scheme

10.4271/2020-01-2242 ◽

2020 ◽

Author(s):

Tae Heon Lee ◽

Seibum Choi

Keyword(s):

Parameter Estimation ◽

Automatic Transmission ◽

Heavy Duty ◽

Heavy Duty Vehicle

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Simulation and Analysis on Stationary Combination Valve of Heavy-Duty Vehicle Automatic Transmission

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.712-715.2183 ◽

2013 ◽

Vol 712-715 ◽

pp. 2183-2187 ◽

Cited By ~ 1

Author(s):

Yan Zhang ◽

Wen Xing Ma ◽

Wen Xu

Keyword(s):

Automatic Transmission ◽

Initial Pressure ◽

Hydraulic Cylinder ◽

Orifice Diameter ◽

Outer Diameter ◽

Spring Stiffness ◽

Heavy Duty ◽

Shift Quality ◽

Buffer Time ◽

Heavy Duty Vehicle

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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