Hydrostatic auxiliary power steering mechanism for motor vehicle

Details Hydrostatic auxiliary power steering mechanism for motor vehicle Hydrostatic auxiliary power steering mechanism for motor vehicle

1988-11-09

1990-09-11

Bertsch, Richard A.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

74388PS, B62D 508

Patent

active

049554450

ABSTRACT:
A hydrostatic auxiliary power steering mechanism for motor vehicles is described, in which the steering cylinder power is controlled by a servo mechanism for which a control loop is provided for regulating oil quantity proportional to the turning of the steering wheel. This control loop is connected in parallel to a hand pump driven by the steering wheel. In this way, the transmission ratio of the hand pump can be selected independently of the auxiliary power control loop in such a way that the vehicle remains steerable in all operating conditions. Moreover, there results the possibility of designing the auxiliary power control loop with external feedback in such a way that disturbance variables of a control system comprising the steering valve, the steering cylinders and the steering linkage can be controlled.

REFERENCES:
patent: 4645025 (1987-02-01), Ohe et al.
patent: 4708220 (1987-11-01), Noto et al.
patent: 4736811 (1988-04-01), Marosen et al.

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