Steuerungssystem für Hybridfahrzeuge

摘要

A control system for a hybrid vehicle including a traction motor (3) which drives a drive shaft (2) of the vehicle by electrical energy and has a regenerative function of converting kinetic energy of the drive shaft (2) into electrical energy, a transmission (4) arranged between driving wheels (5) of the vehicle and an internal combustion engine (1) of the vehicle and the traction motor (3), and a storage battery (14) which supplies electrical energy to the traction motor (3) and stores electrical energy output from the traction motor (3). A desired output from the traction motor (3) is calculated according to decelerating conditions of the vehicle, and an optimal rotational speed of the traction motor at which the traction motor (3) provides a maximum regeneration output is calculated according to the calculated desired output. The change gear ratio of the transmission (4) is controlled such that the rotational speed of the traction motor (3) is equal to the optimal rotational speed.