Control device for controlling front and rear wheel drive vehicle

摘要

A control device for front and rear wheel drive vehicles, in which one of front and rear wheel pairs is driven with an engine and the other one of front and rear wheel pairs is driven with an electrical motor, and a torque converter with a lock-up mechanism capable of controlling the engagement amount is disposed between the engine and the one of wheel pairs, the control device comprising: a lock-up control means 68 and 69 for controlling the lock-up mechanism in such a manner that the engagement amount is changed to the target slip amount to be set in accordance with driving conditions of the front and rear wheel drive vehicle; a motor drive power setting means 61, 62 and 63 which sets the drive power of the motor; a compensation means ( a target slip ratio setting unit) 67 which compensates the target slip amount according to the motor drive power set by the motor drive power setting means. The control device enables the setting of the optimum slip ratio of the torque converter to improve the fuel consumption, avoiding problems associated with noise and vibration during the motor assisting.