Enhancement of Two-Motor Hybrid Engine Start-up Vibration Performance by Motor Starting Torque Control Considering Power Plant Resonance

Abstract

In order to suppress the variation in body vibration at the start-up of a compact two-motor hybrid vehicle, this study focused on the coupling between the initial frequency of the input shaft torque fluctuation due to the forcing force, in addition to the torsional damper resonance and power plant rigid body resonance, which are the causes of the vibration. By increasing the starting torque rise, these coupling effects were avoided, power plant vibration was reduced, and the variation in body vibration was reduced to the same level as the target for a mid-size vehicle.