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A fuel pressure regulator with a flexible diaphragm defining in part first and second chambers in a housing and moving a ball valve in the first chamber to open and closed positions to regulate pressure of fuel discharged from the first chamber through an outlet having a seat on which the ball is re

A fuel pressure regulator with a flexible diaphragm defining in part first and second chambers in a housing and moving a ball valve in the first chamber to open and closed positions to regulate pressure of fuel discharged from the first chamber through an outlet having a seat on which the ball is received when the valve is closed. A cage carried by the diaphragm cooperates with a carrier member or disc fixed to the ball to provide a lost motion coupling between the diaphragm and the ball valve. This coupling permits movement within predetermined limits of the diaphragm generally axially, radially and pivotally relative to the ball while it remains on its seat and upon further generally axial movement of the diaphragm open and partially closes the ball valve to regulate and maintain substantially constant the pressure of fuel discharged from the chamber over substantially the full range of the rate at which the fuel is discharged. Preferably, to further improve regulation, a restricted orifice is disposed in the outlet downstream of the valve seat.

대표청구항 ▼

A fuel pressure regulator comprising: a housing, a diaphragm defining in cooperation with the housing a first chamber and a second chamber, a passage from the second chamber to the exterior of the housing, a fuel inlet to the first chamber, a fuel outlet from the first chamber, a valve seat associat

A fuel pressure regulator comprising: a housing, a diaphragm defining in cooperation with the housing a first chamber and a second chamber, a passage from the second chamber to the exterior of the housing, a fuel inlet to the first chamber, a fuel outlet from the first chamber, a valve seat associated with said fuel outlet and having a generally circular seat surface for engagement with a complementary valve element, a first spring in said second chamber and urging said diaphragm generally axially toward said valve seat, a cage carried by said diaphragm, a valve element having an exterior portion with a generally spherical surface complementary to and for mating sealing engagement with said circular valve seat, said valve element being carried by said cage and movable generally axially by said diaphragm to a closed position received on said valve seat and to an open position spaced from said valve seat, a second spring carried by said cage and yieldably urging said valve element generally axially toward said valve seat relative to said cage, a carrier element carrier by said valve element for movement in unison therewith and projecting generally radially of the longitudinal axis of said valve element, said valve element comprises a ball, said carrier element comprises a disc encircling the mid portion of said ball, projecting generally radially outward thereof and fixed to said ball for movement in unison therewith, said cage having a cavity in which said carrier element is received, and said cavity and said carrier element being dimensioned and constructed and arranged to provide a lost motion coupling between said diaphragm and said valve element so that with said valve element on said valve seat said diaphragm can move generally axially, radially and pivotally within predetermined limits relative to said valve element without moving it from said valve seat and thereafter upon further generally axial movement of said diaphragm away from said valve seat said valve element will be moved from its closed position toward its fully open position.