System for controlling transmission torque of a four-wheel drive

Details System for controlling transmission torque of a four-wheel drive System for controlling transmission torque of a four-wheel drive

1982-09-27

1984-08-21

Peters, Jr., Joseph F.

Motor vehicles

Having four wheels driven

With manually operated means for disengaging drive to one or...

180248, B60K 1734

Patent

active

044665024

ABSTRACT:
A system for a four-wheel drive vehicle for automatically changing transmission torque to rear wheels. The system is provided with a fluid pressure controlled friction clutch which is in a partial engagement state in an ordinary driving condition for transmitting the power of the engine to rear wheels. Therefore, when the vehicle turns a corner, the friction clutch slips to allow the rear wheels to rotate slower than front wheels. A load sensor and slip detecting device are provided for producing signals. A control system is provided to respond to the signals for increasing the engagement part of the friction clutch to provide a sufficient four-wheel driving.

REFERENCES:
patent: 4417641 (1983-11-01), Kageyama

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