Power steering pump flow control

Details Power steering pump flow control Power steering pump flow control

2011-08-09

2011-08-09

Freay, Charles G (Department: 3746)

Pumps

With condition responsive pumped fluid control

Fluid flow rate responsive

C417S053000, C417S302000, C417S441000, C060S468000, C091S446000

Reexamination Certificate

active

07993111

ABSTRACT:
An apparatus for preventing noise from occurring due to cavitation in a power steering pump during low temperature start-up includes the addition of a multi-passage orifice element for adding wetted surface resistance to high viscous fluid flow downstream from a single passage outlet orifice element of a fluid flow control device and upstream of an associated steering gear or steering assist valve.

REFERENCES:
patent: 4446697 (1984-05-01), Goscenski, Jr.
patent: 4549566 (1985-10-01), Fujiwara et al.
patent: 5161959 (1992-11-01), Gettel
patent: 7556479 (2009-07-01), Foor
patent: 2009/0053077 (2009-02-01), Arnett et al.
Bishop, et al., “Power Steering Pump with Enhanced Cold Start Priming”, SAE 2001-01-1422, Society of Automotive Engineers, 2001.

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