Motor vehicles – Having four wheels driven – With manually operated means for disengaging drive to one or...
Patent
1985-12-10
1986-09-23
Love, John J.
Motor vehicles
Having four wheels driven
With manually operated means for disengaging drive to one or...
180167, 180169, 73171, 340 59, B60K 1734, B62D 124
Patent
active
046130080
ABSTRACT:
A control system for automatically selecting a two wheel drive mode or a four wheel drive mode has a rainfall sensor for measuring the amount of precipitation such as rain, an acceleration sensor for measuring acceleration or deceleration of the vehicle, a control unit connected with the sensors for generating a 2WD or 4WD command signal, and an actuator for changing the drive system of the vehicle between the two wheel drive mode and four wheel drive mode in response to the command signal of the control unit. The control unit such as a microcomputer determines a reference acceleration and a reference deceleration each of which is a function of the rainfall measured by the rainfall sensor, and generates the 2WD command signal if the actual acceleration or deceleration is smaller than the reference acceleration or deceleration, and the 4WD command signal if the actual acceleration or deceleration is greater than the reference acceleration or deceleration.
REFERENCES:
patent: 4417641 (1983-11-01), Kageyama
patent: 4444073 (1984-04-01), Moroto et al.
patent: 4504823 (1985-03-01), Berthel
patent: 4520667 (1985-06-01), Nelson
patent: 4558414 (1985-12-01), Sakakiyama
Hiraiwa Kazuyoshi
Muraoka Akihiko
Love John J.
McGiehan Donn
Nissan Motor Co,. Ltd.
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