Motor vehicles – Steering gear – With fluid power assist
Patent
1996-10-22
1999-01-26
Hurley, Kevin
Motor vehicles
Steering gear
With fluid power assist
B62D 5083
Patent
active
058628797
ABSTRACT:
The invention discloses a method for controlling the hydraulic pressure in a power steering device that serves for supplying compressed oil to the left and the right chamber of a power steering cylinder via a rotary slide valve with the aid of a pump, wherein a reaction piston arranged on the input shaft in axially movable and rotationally rigid fashion and connected to the control sleeve of the rotary slide valve via an elastic rotary coupling is inserted between the input shaft and the control sleeve of the rotary slide valve, and wherein a hydraulic reaction device controlled by a control unit with dependence on speed and which serves to control the reaction pressure is arranged in a return line for the hydraulic medium which leads away from the reaction piston. According to the invention, the changes in the hydraulic pressure are determined and used as control parameters for the hydraulic reaction device that is controlled with dependence on speed in addition to the parameter speed.
REFERENCES:
patent: 4913250 (1990-04-01), Emori et al.
patent: 5307895 (1994-05-01), Duffy
patent: 5339917 (1994-08-01), Eberthart
patent: 5392875 (1995-02-01), Duffy
patent: 5396969 (1995-03-01), Joerg et al.
Hurley Kevin
TRW Fahrwerksysteme GmbH & Co. KG
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