Boots – shoes – and leggings
Patent
1990-11-30
1993-05-04
Chin, Gary
Boots, shoes, and leggings
180 791, 180142, B62D 602
Patent
active
052087522
ABSTRACT:
A control apparatus for a power-assisted steering system which includes a servo valve associated with a hydraulic power cylinder to selectively direct the flow of fluid under pressure from a source of hydraulic pressure to opposite fluid chambers of the power cylinder in response to operation of a steering wheel and an electrically operated control valve arranged to control hydraulic pressure for power assist applied to the servo valve in accordance with a control current applied thereto. The control apparatus is arranged to control the value of the control current in such a manner that the hydraulic pressure for power assist is decreased when the steering wheel is returned to its neutral position from its steered position during low speed travel of the vehicle and that the hydraulic pressure for power assist is increased when the steering wheel is returned to its neutral position from its steered position during high speed travel of the vehicle.
REFERENCES:
patent: 4476529 (1984-10-01), Nakamura et al.
patent: 4745985 (1988-05-01), Nakayama et al.
patent: 4979114 (1990-12-01), Oshita et al.
Patent Abstracts of Japan, vol. 013, No. 153 (M-813) Apr. 13, 1989, Publication No.: 63 312268 "Steering Wheel Return Control Device For Power Steering Apparatus".
Patent Abstracts of Japan, vol. 012, No. 160 (M-697) May 14, 1988, Publication No.: 62 279170 "Steering Force Control Device For Power Steering Device".
Eto Kunihiko
Koba Hisashi
Kodama Kazumasa
Kubota Yuzo
Yamaguchi Kimio
Chin Gary
Toyoda Koki Kabushiki Kaisha
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