Patent ID: 6321865
Filing Date: 2001-11-27
Classification: B60K,B60L,B60T,B60W,F16H,Y02T,Y10S

Abstract:
A front-and-rear wheel drive vehicle comprising:an engine driving one of pairs of front wheels and rear wheels;a motor driving the other pair of wheels;a wheel speed sensor detecting wheel speeds of the other pair of wheels;a dog clutch provided between said motor and the other pair of wheels;a motor rotation number estimating unit estimating the motor rotation number from the current value and the duty value of said motor; anda control unit controlling the motor rotation number and the engagement of said dog clutch,wherein said control unit engages said dog clutch after said control unit controls the motor rotation number such that the motor rotation number estimated by said motor rotation number estimating unit coincides with the motor rotation number corresponding to wheel speeds detected with said wheel speed sensor.