Four-wheel drive vehicle running normally and with object...

Details Four-wheel drive vehicle running normally and with object... Four-wheel drive vehicle running normally and with object...

2006-04-07

2009-06-23

Dickson, Paul N (Department: 3611)

Motor vehicles

Having four wheels driven

C180S247000, C180S248000, C180S249000, C701S089000, C701S094000

Reexamination Certificate

active

07549497

ABSTRACT:
A vehicle includes a wheel speed sensor sensing a vehicle speed V, a 2WD/4WD switch operative to input an instruction to switch between a two-wheel driving state and a four-wheel driving state, a transfer and an actuator switching the two-wheel driving state and the four-wheel driving state, and an ECU driving the actuator. The ECU instructs the actuator to switch from the four-wheel driving state to the two-wheel driving state regardless of the switching instruction from the 2WD/4WD switch if the vehicle tows a trailer and runs in the four-wheel driving state when the vehicle speed exceeds a predetermined value. Consequently, it is possible to provide a four-wheel drive vehicle capable of running while towing an object and also avoiding an increase in the size of the peripheral parts of driving wheels.

REFERENCES:
patent: 4995862 (1991-02-01), Arocha
patent: 6865468 (2005-03-01), Lin et al.
patent: 7349776 (2008-03-01), Spillane et al.
patent: 2003-14100 (2003-01-01), None

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