Research on flexible and controllable starting strategy for commercial vehicle diesel range extender
by Zhuo Zhang; Yuzhen Yuan; Zhiqiang Lin; Kang Song; Zhengsong Mao; Fahua Huang
International Journal of Powertrains (IJPT), Vol. 13, No. 4, 2024

Abstract: For range extender, engine starting conditions and boosting methods lead to varying oil film formation and pressure establishment durations, resulting in differences in optimal starting durations. This paper primarily addresses the control issue of range extender starting duration. Initially, it establishes and validates the dynamic model of the target range extender system, consisting of a four-cylinder diesel engine and a flywheel integrated starter generator (FISG). Subsequently, designing an adjustable and controllable target speed curve by polynomial splicing, and calibrates curve parameters by optimising vibration performance indicators. Based on the target speed curve, the motor torque is designed, with the torque corresponding to the speed primarily constructing the feedforward torque, supplemented by the feedback torque. Finally, the proposed starting control strategy is validated on the test bench, compared with the original strategy, and the impact of different control parameters on the starting control effect is analysed, confirming the effectiveness of the proposed strategy in achieving flexible and controllable starting times.

Online publication date: Mon, 17-Feb-2025

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