System for controlling the transmission of a four-wheel drive ve

Details System for controlling the transmission of a four-wheel drive ve System for controlling the transmission of a four-wheel drive ve

1983-12-15

1986-03-18

Pate, III, Willaim F.

Machine element or mechanism

Gearing

Plural power paths to and/or from gearing

74665GA, 74861, F16H 3706

Patent

active

045760616

ABSTRACT:
A system for controlling a power transmission of a four-wheel drive vehicle powered by an engine. The system is provided with a transmission for transmitting a power of the engine to main wheels, a clutch for selectively transmitting the power to auxiliary wheels, a vehicle speed sensor for sensing the speed of the vehicle and for producing a vehicle speed signal dependent on the speed, a steering angle sensor for sensing the steering angle of the vehicle and for producing a steering angle signal dependent on the steering angle. A control circuit is provided to compare the vehicle speed signal and steering angle signal with reference values and judge whether the condition is in the range of conditions causing tight corner braking and to produce a clutch signal. A switch is responsive to the clutch signal for disengaging the clutch, whereby the four-wheel drive is changed to the two-wheel drive.

REFERENCES:
patent: 4298085 (1981-11-01), Moroto et al.
patent: 4367661 (1983-01-01), Moroto et al.
patent: 4387795 (1983-06-01), Mueller
patent: 4407387 (1983-10-01), Lindbert
patent: 4417641 (1983-11-01), Kageyama
patent: 4433748 (1984-02-01), Satoh et al.
patent: 4466502 (1984-08-01), Sakai

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