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CLC number: U270.1

On-line Access: 2024-08-27

Received: 2023-10-17

Revision Accepted: 2024-05-08

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Journal of Zhejiang University SCIENCE A 2004 Vol.5 No.7 P.878-883

http://doi.org/10.1631/jzus.2004.0878


Study on shift schedule saving energy of automatic transmission of ground vehicles


Author(s):  GONG Jie, ZHAO Ding-xuan, CHEN Ying, CHEN Ning

Affiliation(s):  College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China; more

Corresponding email(s):   gongjie@zju.edu.cn

Key Words:  Ground vehicle, Hydrodynamic drive, Automatic transmission, Shift schedule, Saving energy, Shift quality


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Abstract: 
To improve ground vehicle efficiency, shift schedule energy saving was proposed for the ground vehicle automatic transmission by studying the function of the torque converter and transmission in the vehicular drivetrain. The shift schedule can keep the torque converter working in the high efficiency range under all the working conditions except in the low efficiency range on the left when the transmission worked at the lowest shift, and in the low efficiency range on the right when the transmission worked at the highest shift. The shift quality key factors were analysed. The automatic transmission’s bench-test adopting this shift schedule was made on the automatic transmission’s test-bed. The experimental results showed that the shift schedule was correct and that the shift quality was controllable.

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