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

1986-05-06

Gluck, Richard E.

Motor vehicles

Having four wheels driven

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

B60K 2308

Patent

active

045865833

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, and a clutch for transmitting the power to auxiliary driving wheels. A hydraulic circuit and a solenoid operated valve are provided for operating the clutch.
First sensors are provided for detecting the speed of the main and auxiliary driving wheels, respectively, and second sensors are provided for detecting depression of an accelerator pedal and depression of a brake pedal of the vehicle respectively. When a large difference between the speed of the wheels is detected, the clutch is engaged, and when a large acceleration and large deceleration dependent on the output of the first sensors are detected, the clutch is engaged for establishing the four-wheel drive.

REFERENCES:
patent: 4466502 (1984-08-01), Saki

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