Torque distribution control device for four-wheel drive vehicle

Details Torque distribution control device for four-wheel drive vehicle Torque distribution control device for four-wheel drive vehicle

2005-05-03

2005-05-03

DePumpo, Daniel G. (Department: 3611)

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

C701S089000

Reexamination Certificate

active

06886652

ABSTRACT:
A torque distribution control device for a four-wheel drive vehicle is disclosed, wherein a torque transmitted from an engine to prime drive wheels is distributed by an electromagnetic clutch to sub-drive wheels on an on-demand basis. A pre-torque is determined based on a vehicle speed and a throttle opening degree in a feed-forward sense. A compensation torque is determined based on the rotational speed difference between the prime drive wheels and the sub-drive wheels and the vehicle speed in a feedback sense. The pre-torque and the compensation torque are added for a command torque, depending on which the electromagnetic clutch is controlled to transmit the torque from the engine to the sub-drive wheels. At this time, since the command torque is limited to an upper limit value therefor or below in dependence on the engine torque, an ECU can be prevented from applying an excess current to an electromagnetic coil of the electromagnetic clutch and hence, from generating heat to raise its temperature when the engine torque is small.

REFERENCES:
patent: 4936406 (1990-06-01), Tezuka et al.
patent: 5450919 (1995-09-01), Shitani
patent: 5655618 (1997-08-01), Wilson et al.
patent: 6497301 (2002-12-01), Iida et al.
patent: 6698541 (2004-03-01), Sakakiyama
patent: 2001-71781 (2001-03-01), None

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