Power plants – Pressure fluid source and motor – Condition responsive control of motive fluid flow
Patent
1991-03-11
1992-05-12
Look, Edward K.
Power plants
Pressure fluid source and motor
Condition responsive control of motive fluid flow
60494, 180132, 180142, F16D 3102, B62D 506
Patent
active
051116600
ABSTRACT:
A power steering pump includes a housing defining an opening containing a sliding vane rotor, a cam ring and pressure plates located at each axial side of the rotor and having inlet ports connected to a source of low pressure fluid and outlet ports connected to a power steering system. The pressure control valve opens and closes an orifice of constant size connecting the pump outlet to a power steering gear. An electronically variable orifice arranged in parallel with the fixed orifice connects the pump and outlet to the power steering gear. When the control valve opens sufficiently, the pump outlet is connected to the inlet through a diffuser arranged to draw low pressure fluid into a high velocity stream of bypass fluid. Kinetic energy of the stream is used to increase static pressure in the fluid supplied to the pump inlet.
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Ford Motor Company
Look Edward K.
May Roger L.
McKenzie Frank G.
Ryznic John
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