HYBRID SYSTEM, HYBRID VEHICLE AND POWER TRANSMISSION METHOD FOR HYBRID SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a hybrid system that enables shortening of time to traveling start by reducing generation torque of a starter required at start of an internal combustion engine and at restart from idling stop, a hybrid vehicle and a power transmission method for the hybrid system.SOLUTION: In a hybrid system including an internal combustion engine 10 and a motor generator 21, the motor generator 21 is directly or indirectly connected to a crank shaft 15 of the internal combustion engine 10. During operation to stop the internal combustion engine 10, a hybrid control device 41 for controlling the motor generator 21 performs control by rotating the crank shaft 15 by driving force of the motor generator 21 so as to form a crank angle that causes smaller friction of the rotation of the crank shaft 15 compared to a crank angle when the crank shaft 15 is stopped.