System for controlling the transmission of a four-wheel drive vehicle
A system is described for controlling power transmission of a four-wheel drive vehicle powered by an engine comprising: a transmission for transmitting power of the engine to main wheels of the vehicle; a clutch for selectively transmitting the power to auxiliary wheels of the vehicle, whereby the main and auxiliary wheels are power driven; first sensing means for sensing the speed of the vehicle and for producing vehicle speed signals as a function of the speed; second sensing means for sensing the steering angle of the vehicle and for producing steering angle signals as a function of the steering angle; control means responsive to the vehicle speed and steering angle signals for producing a clutch signal as a function of the vehicle speed and steering angle such that when the vehicle speed is low, the clutch signal is produced at a first steering angle, and as the vehicle speed increases, the steering angle for the clutch signal increases; and switch means responsive to the clutch signal for disengaging the clutch, whereby the four-wheel drive is changed to the two-wheel drive.
- Assignee:
- Fuji Jukogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4576061
- OSTI ID:
- 5636639
- Country of Publication:
- United States
- Language:
- English
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System for controlling a power transmission of a four-wheel drive vehicle
System for controlling a power transmission of a four-wheel drive vehicle