Electronic power assist control steering system

Details Electronic power assist control steering system Electronic power assist control steering system

1987-10-30

1989-05-09

Mitchell, David M.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

91452, 180143, B62D 508

Patent

active

048280674

ABSTRACT:
A variable assist power steering gear mechanism for vehicles having primary and secondary steering valve portions, the primary portion controlling pressure in a power steering fluid motor, a steering pressure valve that controls the magnitude of the steering pressure as a function of vehicle speed, a steering torque sensor flow control valve that cooperates with the secondary steering valve portion to develop a steering torque signal, and an electronic signal processor for controlling the steering pressure valve in response to changes in the vehicle speed and the steering torque signal.

REFERENCES:
patent: 3901343 (1975-08-01), Inoue
patent: 4561521 (1985-12-01), Duffy
patent: 4570735 (1986-02-01), Duffy
patent: 4570736 (1986-02-01), Waldorf
patent: 4693332 (1987-09-01), Miyata et al.

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