Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1991-06-04
1993-05-04
Focarino, Margaret A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180149, 60384, 13762521, B62D 5083
Patent
active
052077802
ABSTRACT:
A power steering device for a motor vehicle whereby when the vehicle is under a high or middle speed movement, the slide torque is controlled to a relatively low constant level irrespective of the turning of the steering wheel. The device includes a hydraulic pump for producing a hydraulic pressure; a power cylinder powered by the hydraulic pressure for producing a force to assist the steering job; a hydraulic valve for controlling the hydraulic pressure supplied to the power cylinder, the hydraulic valve including a valve shaft and a valve body; a chattering protection seal associated with the hydraulic valve to assure a concentric rotation of the valve shaft relative to the valve body with an assistance of hydraulic pressure applied thereto; and an electronically controlled solenoid valve. The electronically controlled solenoid valve applies when the vehicle is at a standstill or under a low speed movement, the chattering protection seal with a hydraulic pressure which is varied as a steering wheel is turned, and applies, when the vehicle is under a high or middle speed movement, the chattering protection seal with a hydraulic pressure which is controlled to a relatively low constant level even when the steering wheel is turned.
REFERENCES:
patent: 4122866 (1978-10-01), Schluckebier
patent: 4573496 (1986-03-01), Richard
patent: 4633907 (1987-01-01), Adams
patent: 4860846 (1989-08-01), Uchida et al.
patent: 5048628 (1991-09-01), Rayner
patent: 5097920 (1992-03-01), Holm Pederson et al.
Nissan's Service Manual published in 1981 and translation of p. 29.
Norimatsu Naoki
Uchida Koh
Yuzuriha Naoki
Focarino Margaret A.
Mattix Carla
Nissan Motor Co,. Ltd.
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