Four-wheel drive vehicle having differential-limiting control

Details Four-wheel drive vehicle having differential-limiting control Four-wheel drive vehicle having differential-limiting control

1997-10-28

2000-11-14

Johnson, Brian L.

Motor vehicles

Having four wheels driven

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

180247, 180142, 180197, B60K 17344

Patent

active

061456144

ABSTRACT:
A four-wheel drive vehicle of the present invention includes: a first differential mechanism for distributing engine drive force to front drive wheels and rear drive wheels; a second differential mechanism for distributing engine drive force to left and right main drive wheels (the main drive wheels get more drive force than other drive wheels); first differential-limiting device for operating differential-limiting control by the first differential mechanism; second differential-limiting device for operating differential-limiting control by the second differential mechanism; rotational speed detection device for detecting rotational speed of each drive wheel; turn direction detection device for detecting the direction of a turn that the vehicle is making; and control means for, based on detection signals from the rotational speed detection device and the turn direction detection device, controlling differential-limiting force provided by the second differential-limiting device according to a difference between the rotational speed of the left main drive wheel and that of the right main drive wheel, determining front and rear drive wheels on the outer side in the turn direction, and controlling differential-limiting force provided by the first differential-limiting device according to a rotational speed difference between the front and rear drive wheels on the outer side in the turn direction.

REFERENCES:
patent: 4986388 (1991-01-01), Matsuda
patent: 5070961 (1991-12-01), Tezuka
patent: 5132908 (1992-07-01), Eto
patent: 5396421 (1995-03-01), Niikura
patent: 5701247 (1997-12-01), Sasaki
patent: 5894904 (1999-04-01), Yakou et al.

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