System for controlling a power transmission of a four-wheel drive vehicle
This patent describes an improved system for controlling a power transmission of a four-wheel drive vehicle powered by an engine having 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. It also has a second sensor for detecting the speed of the vehicle and for producing a speed output signal dependent on the speed and circuit means for operating the clutch in accordance with driving conditions. The improvement described here comprises: a first sensor for detecting the inclination of roads and for producing an inclination output signal dependent on the inclination, and the circuit means includes control means responsive to the output signals from the first sensor and the second sensor for engaging the clutch when the speed output signal is smaller than a predetermined speed signal which is decided by the inclination of the road.
- Assignee:
- Fuji Jukogyo Kabushiki Kaisha, Tokyo
- Patent Number(s):
- US 4630704
- OSTI ID:
- 6924378
- 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 the transmission of a four-wheel drive vehicle