Driving force distribution control device for vehicle

A driving force distribution control device for a vehicle for controlling engaging force of a coupling mechanism so as to change transmission torque, thereby distributing driving force, said device comprising:

• means for continuously changing a torque limiter, which limits engaging force of the coupling mechanism, from a limiter value in an ordinary control state according to a driving state to a limiter value in a specific control state at a time of detecting any abnormal increase in oil temperature in a driving force transmission system;
• means for controlling engaging force of the coupling mechanism so as to be kept below the limiter value of the torque limiter in every control state;
• and
• means for setting amount-of-change of the torque limiter per time increment at transition from the ordinary control state to the specific control state and amount-of-change of the torque limiter per time increment at recovery from the specific control state to the ordinary control state such that the former is relatively larger than the latter.

A driving force distribution control device for a vehicle for controlling engaging force of a coupling mechanism so as to change transmission torque, thereby distributing driving force, the device comprising:

• means for continuously changing a torque limiter, which limits engaging force of the coupling mechanism, from a limiter value in an ordinary control state according to a driving state to a limiter value in a specific control state that protects a driving force transmission system;
• means for controlling engaging force of the coupling mechanism so as to be kept below the limiter value of the torque limiter in every control state;
• and
• means for setting amount-of-change of the torque limiter per time increment at transition from the ordinary control state to the specific control state and amount-of-change of the torque limiter per time increment at recovery from the specific control state to the ordinary control state such that the former and the latter is substantially equal at the low speed range of the vehicle.