Power steering for motor vehicles with power assistance increase

Details Power steering for motor vehicles with power assistance increase Power steering for motor vehicles with power assistance increase

1987-01-14

1988-06-21

Pekar, John A.

Motor vehicles

Surface effect vehicles

Dynamic seal or fluid curtain

60430, B62D 506

Patent

active

047519770

ABSTRACT:
A power steering system for motor vehicles includes a two chamber piston and cylinder actuator connected to an output member output member of the steering system and first and second sources of fluid pressure having different absolute pressures p1 and p2, respectively, wherein p2 is greater than p1. A regulating valve is connected between the sources and the actuator for controlling the pressure medium sources to each chamber of the actuator in response to torque applied to an input element of the steering system. An additional pump is connected between at least one of the sources and the actuator for increasing the pressure difference in the actuator when appropriate. The fluid utilized is air, and the system normally operates without the use of the additional pump using only the pressure jump p2-p1 between the first and second sources.

REFERENCES:
patent: 3952510 (1976-04-01), Peterson

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