Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1993-12-16
1996-02-27
Focarino, Margaret A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180143, 91371, B62D 5083, F15B 908
Patent
active
054941270
ABSTRACT:
A power steering control valve including relatively rotatable inner and outer valve members. A power steering resistance control system resists relative rotation between the inner and outer valve members with a force which varies as a function of variations in vehicle speed and steering demand. The power steering resistance control system includes a force transmitting member which is disposed adjacent to one end of an outer valve member. A spring force is applied against the force transmitting member urging it in a first direction along the axis of rotation of the valve member. Fluid pressure is applied against the force transmitting member to urge it in the first direction. In a first embodiment, a speed responsive valve is operable to vary the fluid pressure applied against the force transmitting member as a function of variations in vehicle speed. A hydraulic pressure responsive valve is operable to vary the fluid pressure applied against the force transmitting member as a function of steering demand. In a second embodiment, only a hydraulic pressure responsive valve controls the pressure applied against the force transmitting member.
REFERENCES:
patent: 4811806 (1989-03-01), Lang
patent: 4819545 (1989-04-01), Dymond
patent: 5046574 (1991-09-01), Goodrich et al.
patent: 5070958 (1991-12-01), Goodrich et al.
patent: 5291963 (1994-03-01), Sangret
patent: 5348110 (1994-09-01), Klein et al.
patent: 5392875 (1995-02-01), Duffy
Focarino Margaret A.
Mattix Carla
TRW Inc.
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