Steering system with auxiliary force assist for vehicles in whic

Details Steering system with auxiliary force assist for vehicles in whic Steering system with auxiliary force assist for vehicles in whic

1986-11-10

1987-08-04

Love, John J.

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

180141, B62D 506

Patent

active

046839720

ABSTRACT:
In a steering system with auxiliary force assist for vehicles, especially motor vehicles, steerable vehicle wheels are connected by way of a steering gear with a steering hand wheel as also with a pressure medium servo motor. A central steering limit valve which reduces the working pressure of the servo motor upon reaching a maximum value of the deflection angle of a steering wheel as fixed by mechanical end abutments at the vehicle, is connected directly with the pump pressure line of a steering assist pump connected with the servo motor and is also controllable by sensors influenced by the deflection angle. In order to be able to utilize the smallest possible turning radius with auxiliary force assist, without having to expose vehicle frame and steering linkage to high servo forces in the abutment positions, the sensors are arranged at the end abutments and produce a control signal changing with the deflection angle. An analog valve used as steering limit valve is so influenced by the control signal that the working pressure is reduced preferably in proportional dependence on the increase of the deflection angle.

REFERENCES:
patent: 4473128 (1984-09-01), Nakayama et al.
patent: 4485883 (1984-12-01), Duffy
patent: 4627509 (1986-12-01), Adam et al.

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