Torque coordination of clutch, engine and motor during power transition for a hybrid electric bus

Chen, L.; Xi, Gang

doi:10.1109/vppc.2010.5729114

Cited by 1 publication

(1 citation statement)

References 14 publications

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“…Due to the different dynamic characteristics of the engine, motor, and wet clutch, driving mode switches from one to another cause torque fluctuations, which deteriorate the riding 2 of 19 comfort. Therefore, it is necessary to control the dynamic process of driving mode switches effectively to reach a coordinated work state between engine, motor, and clutch [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Control Strategy for Driving Mode Switches of Plug-in Hybrid Electric Vehicles

et al. 2018

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Driving mode switches of hybrid vehicles are significant events. Due to the different dynamic characteristics of the engine, motor, and wet clutch, it is difficult to coordinate torque fluctuations caused by mode switches. This paper focused on a control strategy for driving mode switches of plug-in hybrid electric vehicles (PHEVs) with a multi-disk wet clutch. First, the dynamic model of the PHEV was established, and a rule-based control strategy was proposed to divide the working mode regions and distribute the torque between engine and motor. Second, the dual fuzzy control strategy for a wet clutch and the coordinated torque control strategy for driving mode switches were proposed. The dual fuzzy logic control system consisted of the initial pulse-width modulation (PWM)’s duty cycle control and the changing rate of the PWM’s duty cycle control. Considering the difference in the dynamic characteristics between engine, motor, and wet clutch, a coordinated control strategy for the driving mode switches of PHEVs was put forward. Third, simulations of driving mode switches between pure electric driving mode and only engine driving mode were conducted. The results showed that the proposed control strategy could reduce the torque ripple and the jerk of the vehicle, completely satisfying the requirements of China. Finally, the control strategy for the motor-assisted engine starting process was tested on the bench. The experiment results indicated that the proposed control strategy was effective.

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Section: Introductionmentioning

confidence: 99%