Parallel hybrid vehicle control method and parallel hybrid vehicle control apparatus

摘要

PROBLEM TO BE SOLVED: To provide a parallel type hybrid vehicle control method and a control device reducing torque variation during switching between engine travel and motor travel.SOLUTION: When engine travel is switched to motor travel, an engine is operated with no load while holding an engine rotation speed. A friction torque estimation value is estimated on the basis of indicated torque at that time, a friction torque calculation value is calculated on the basis of an engine state during the engine travel in the past, and a friction torque correction value is found on the basis of the difference between the friction torque calculation value and the friction torque estimation value. When the motor travel is switched to the engine travel, the friction torque calculation value and the friction torque correction value are added to request torque for the engine to obtain target indicated torque. A fuel injection amount is controlled so that the indicated torque becomes the target indicated torque.