A Study on the Drivability of Hybrid Electric Vehicle

This paper studies the drivability of Hybrid Electric Vehicles (HEV), and presents some methods to improve the drivability based on experiment results. First, the working principle of HEV is introduced and the hybrid powertrain is modeled. The jerk of vehicle is applied in this paper to evaluate the drivability of HEV. After studying the cause of jerk, a series of experiments of vehicle starting, state-changing, shifting and braking are designed and implemented on a parallel HEV with an automated mechanical transmission. Analysis of these experiment results shows that optimization of clutch control and cooperation of the engine and the motor on speed and torque are effective in reducing the jerk of vehicle.