System for controlling a power transmission of a four-wheel driv

Details System for controlling a power transmission of a four-wheel driv System for controlling a power transmission of a four-wheel driv

1984-09-17

1986-12-23

Davis, Jr., Albert W.

Motor vehicles

Having four wheels driven

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

180233, B60K 2308

Patent

active

046307044

ABSTRACT:
A system for controlling a power transmission of a four-wheel drive vehicle powered by an engine has a transmission for transmitting the power of the engine to main driving wheels of the four-wheel drive vehicle, a hydraulically operated clutch for transmitting the power to auxiliary driving wheels, a hydraulic circuit for operating the clutch in accordance with driving conditions. The system comprises a sensor for detecting the inclination of roads and for producing an output signal dependent on the inclination, and a control circuit responsive to the output signal from the sensor for engaging the clutch when the output signal exceeds a predetermined value, thereby establishing the four-wheel drive.

REFERENCES:
patent: 4417641 (1983-11-01), Kageyama
patent: 4551014 (1985-04-01), Makita

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