System for driving an automotive vehicle

A drive system for driving an automotive vehicle having one of a) left and right front wheels and b) left end right rear wheels driven with an engine as primarily driven wheels and the other driven with a motor means as secondarily driven wheels, comprising:

• a drive control means for controlling the driving of said motor means so as to drive said secondarily driven wheels in the same direction in which said primarily driven wheels are driven with said engine, only when a running state of said vehicle exists in a predetermined driving region;
• and
• a driving-region altering means for altering said driving region in accordance with said running state of the vehicle, said driving-region altering means being adapted as to alter said driving region on the basis of a lateral G-force acting upon the vehicle body.

A drive system for driving an automotive vehicle having one of a) left and right front wheels and b) left and right rear wheels driven with an engine as primarily driven wheels and the other driven with a motor means as secondarily driven wheels, comprising:

• a drive control means for controlling the driving of said motor means so as to drive said secondarily driven wheels in the same direction in which said primarily driven wheels are driven with said engine, only when a running state of said vehicle exists in a predetermined driving region;
• and
• a driving-region altering means for altering said driving region in accordance with said running state of the vehicle, said driving-region altering means being adapted as to alter said driving region on the basis of a road surface friction coefficient .mu..

A drive system for driving an automotive vehicle having one of a) left and right front wheels and b) left and right rear wheels driven with an engine as primarily driven wheels and the other driven with a motor means as secondarily driven wheels, comprising:

• a drive control means for controlling the driving of said motor means so as to drive said secondarily driven wheels in the same direction in which said primarily driven wheels are driven with said engine, only when a running state of said vehicle exists in a predetermined driving region;
• and
• a driving-region altering means for altering said driving region in accordance with said running state of the vehicle, said driving-region altering means being adapted as to alter said driving region on the basis of a steered angle of a steering wheel.

A drive system for driving an automotive vehicle having one of a) left and right front wheels and b) left and right rear wheels driven with an engine as primarily driven wheels and the other driven with a motor means as secondarily driven wheels, comprising:

• a drive control means for controlling the driving of said motor means so as to drive said secondarily driven wheels in the same direction in which said primarily driven wheels are driven with said engine, only when a running state of said vehicle exists in a predetermined driving region;
• and
• a driving-region altering means for altering said driving region in accordance with said running state of the vehicle, said driving-region altering means being adapted as to alter said driving region on the basis of a road condition.

A drive system for driving an automotive vehicle having one of a) left and right front wheels and b) left and right rear wheels driven with an engine as primarily driven wheels and the other driven with a motor means as secondarily driven wheels, comprising:

• a drive control means for controlling the driving of said motor means so as to drive said secondarily driven wheels in the same direction in which said primarily driven wheels are driven with said engine, only when a running state of said vehicle exists in a predetermined driving region;
• and
• a driving-region altering means for altering said driving region in accordance with said running state of the vehicle, said driving-region altering means being adapted to alter said driving region by employing at least a vehicle speed, a steered angle of a steering wheel and a road surface friction coefficient .mu. as parameters.

A drive system for an automotive vehicle having one of, a) left and right front wheels and b) left and right rear wheels driven with an engine as primarily driven wheels and the other driven with a motor means as secondarily driven wheels, comprising:

• said motor means comprising a pair of left and right motors disposed for driving said left and right secondarily driven wheels discretely and separately;
• and
• a clutch for mechanically coupling said left and right secondarily driven wheels to each other when a predetermined condition is set.