Automatic transmission having a pressure regulator with flow...

Details Automatic transmission having a pressure regulator with flow... Automatic transmission having a pressure regulator with flow...

2005-03-17

2008-10-07

Lee, Kevin L (Department: 3753)

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

C137S625690, C137S597000, C251S282000

Reexamination Certificate

active

07431043

ABSTRACT:
An automatic transmission having a pressure regulator with flow force compensation. The pressure regulator includes a valve body having a valve bore and at least one inlet and at least one outlet adapted to provide fluid communication with a source of pressurized hydraulic fluid and a return to the source of pressure. A valve member is slidingly disposed within the valve body that includes at least one valve element having an outer diameter and a metering face. The metering face is adapted to control the flow of pressurized hydraulic fluid between the inlet and the outlet of the valve body. The metering face includes a flow force compensating annular void disposed adjacent to the outer diameter that is defined by a lead angle α measured between the outer surface and a line intersecting the outer surface and tangential to the annular void.

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