Driveline Vibration Reduction of Two-Mode Hybrid System

摘要

In order to achieve better performance of fuel consumption in hybrid vehicles, the internal combustion engine is controlled to operate in a better efficient zone, and often turn off and on during driving, coordinating with motors for power output. However, while starting engine or shifting the mode, the instantaneous large torque of engine may occur, which easily leads to a high vibration of the elastomer on the driveline. This research built a two-mode power-spit hybrid system model with elastomers by using MATLAB/Simulink. Pause cancelation (PC) and Proportional-Integral-Derivative Control (PID) were employed in this research. In the research results, in the two-mode hybrid system with engine damper, half-shaft, and tires, PC was able to mitigate the peak-to-peak value of half-shaft reaction torque by about 22.5%. However, the mitigation effect of PID and PC-PID was better than PC, and the mitigation effect was able to reach 40%. The vibration was also converged faster.