Power steering device for four-wheel drive vehicle

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United States of America Patent

PATENT NO 7717224
SERIAL NO

11328874

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Abstract

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The present invention offers a power steering device for a four-wheel drive, which includes: a first self-aligning torque estimation unit for estimating a self-aligning torque generated in a current vehicle behavior as a first self-aligning torque; a second self-aligning torque estimation unit for estimating a self-aligning torque that is to influence a subsequent vehicle behavior as a second self-aligning torque; a self-aligning torque change amount calculation unit for calculating a difference of the second self-aligning torque from the first self-aligning torque as a self-aligning torque change amount; and an assisting force correction unit for determining and outputting a corrected value of an assisting force to be generated for a steering operation based on the self-aligning torque change amount. Therefore, even when the self-aligning torque changes as the distribution of the front and rear driving power is variably controlled, a corresponding assisting force is generated, maintaining a natural steering feeling without causing an unpleasant sensation to the driver.

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Patent Owner(s)

Patent OwnerAddress
FUJI JUKOGYO KABUSHIKI KAISHATOKYO

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kanazawa, Kazuo Tokyo, JP 15 119
Kiryu, Hiroyuki Tokyo, JP 2 15
Shibuya, Makoto Tokyo, JP 58 418
Yamazaki, Yoshinobu Tokyo, JP 12 59
Yoneda, Takeshi Tokyo, JP 37 359

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