Driving torque distribution control system for 4WD vehicle

Details Driving torque distribution control system for 4WD vehicle Driving torque distribution control system for 4WD vehicle

1986-09-12

1988-09-27

Love, John J.

Motor vehicles

Having four wheels driven

B60K 1734

Patent

active

047735007

ABSTRACT:
A four wheel drive system has an interaxle multiple disc friction clutch, an actuator for varying torque transmitted through the clutch to a front wheel drive shaft by varying a clutch pressure of the clutch, first and second sensors for sensing rotational speeds of the front wheel and rear wheel drive shafts, a third element for producing a third signal, and a control unit for controlling a driving torque distribution between the front and rear wheel drive shafts by sending a control signal to the actuator. The control means increases the torque transmitted through the clutch with increase in a speed difference between the front wheel and rear wheel drive shafts in accordance with one of characteristics selected in accordance with the third signal. The third element is designed to find a condition of the vehicle which can be controlled by a driver of the vehicle, and may take the form of an accelerator position sensor or a manually operated selector switch.

REFERENCES:
patent: 4444286 (1984-04-01), Hawkins
patent: 4466502 (1984-08-01), Sakai
patent: 4484654 (1984-11-01), Hayakawa

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