A novel synchronizer for clutchless automated manual transmissions applied in electric vehicles

Zhang, Lipeng; Yang, Hongyong; Peng, Yunao; Li, Shaohua

doi:10.1016/j.mechmachtheory.2021.104688

Cited by 7 publications

(1 citation statement)

References 19 publications

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“…This makes it easier to produce quick and smooth gearshift performance because of the drive motor's quick adjustment capability, which includes torque and speed. Because of this, numerous research use AMT to increase the EVs' drive range [6][7][8][9]. Meanwhile, it is also possible to enhance the EVs' dynamic performance.…”

Section: Introductionmentioning

confidence: 99%

Precise and coordinated gearshift control for AMT gearshift system equipped with two linear actuators

Lin,

Li,

Tang

et al. 2024

Mechanics & Industry

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A type of automated manual transmission gearshift system that uses two linear actuators to perform gearshift events is presented. The shifting mechanism can be made simpler by using linear actuator to drive the shift fork directly. The mathematical model of the actuator is built and analyzed. Coordinated control of the engagement and disengagement processes is created based on a detailed analysis of the gearshift process in order to shorten the shift time. The force characteristics test reveals the nonlinear output characteristics. The precise displacement control need for coordinated control and stable control requirement for the shifting operation are satisfied by a linear extended state observer based controller. To verify the novel gearshift system and the control method, a test bench and control system are constructed. The results of the simulations indicate that the displacement control's accuracy is enhanced. As the speed difference reaches 500 r/min, the testing results demonstrate a noticeably reduced of shift force fluctuation and jerk generated during the gearshift process, from 20 m/s3 to 3.1 m/s3. With the improved gearshift system and control method, the gearshift coordinated control can also save 25 ms of shift time.

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Section: Introductionmentioning

confidence: 99%