Slope Starting Control of Off-Road Vehicle with 32-Speed Binary Logic Automatic Transmission

2022-01-5001

01/03/2022

Features
Event
Automotive Technical Papers
Authors Abstract
Content
Taking an off-road vehicle equipped with 32-speed binary logic automatic transmission (AT) as the research object, the slope starting control research is carried out. The slope starting process is divided into the overcoming resistance stage, the sliding friction stage, and the synchronization stage. The control strategies for each stage are designed respectively. Focusing on the control of the sliding friction stage, the equivalent two-speed model of the starting clutch is established, which realizes the calculation of the speed difference and the slip rate between the driving and driven ends of the starting clutch. Furthermore, the slope starting control strategy based on the proportional-integral-derivative (PID) control of the clutch slip rate is designed. Through the simulation tests of the vehicle starting at different slopes, the correctness of the slope starting control strategy has been verified by MATLAB/Simulink. The strategy proposed in this paper shortens the slope starting time and reduces the starting jerk and the sliding power of the off-road vehicle, which is of great significance to the research on the slope starting control of the multi-gear AT with a small gear ratio.
Meta TagsDetails
DOI
https://doi.org/10.4271/2022-01-5001
Pages
8
Citation
Wang, Y., Liang, W., Yang, L., and Zeng, X., "Slope Starting Control of Off-Road Vehicle with 32-Speed Binary Logic Automatic Transmission," SAE Technical Paper 2022-01-5001, 2022, https://doi.org/10.4271/2022-01-5001.
Additional Details
Publisher
Published
Jan 3, 2022
Product Code
2022-01-5001
Content Type
Technical Paper
Language
English