Part-time four-wheel drive system with braking force responsive control
A four-wheel drive vehicle is described which consists of: an engine, a pair of first wheels and a pair of second wheels, a drive system capable of transmitting power from the engine to the first wheels and the second wheels, the drive system comprising changeover means for changing the drive system from a two-wheel drive mode to a four-wheel drive mode and vice versa, and a control system comprising means for sensing a braking force of the vehicle, condition sensing means for detecting whether the drive system is in the two-wheel drive mode or the four-wheel drive mode, and control means, connected with the braking force sensing means and the condition sensing means, for controlling the changeover means in accordance with signals of the braking force sensing means and the condition sensing means, the control means being arranged to cause the changeover means to change the state of the drive system from the two-wheel drive mode to the four-wheel drive mode if the sensed braking force of the vehicle is equal to or higher than a predetermined value, and at the same time the drive system is in the two-wheel drive mode.
- Assignee:
- Nissan Motor Co., Ltd.
- Patent Number(s):
- US 4582159
- OSTI ID:
- 5686635
- Country of Publication:
- United States
- Language:
- English
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