Delphi Technologies, Inc.

Gm Global Technolgoy Operations, Inc.

Grover Wesley Preston

Charles Wilson Braun

Ahmet T Becene

Thomas J Gutmann

Jeffrey Allan Rock

David Howard Burke

Sharon Elizabeth Beyer

Curtis David Lamb

Gary John Deangelis

Michael Roland Brosseau

Chris Clarence Begley

Roland S Taylor

Mohammed Aslam

Richard Lloyd Cooper

Robert Augustine Zaso

Steven J Fogarassy

Edwin A Rivera

Kurt T Hertzog

Philip Moore Anderson

Anatol Avdenko

Daniel J Buehler

A pressure relief valve useful in vehicle fuel delivery systems includes a spring biased, concave conical flow directing surface and a spherical valve seat.

Conical concave cap pressure relief valve

A fuel pressure regulator including a valve head having a centerline offset from the centerline of a corresponding fuel orifice. The valve head may be offset with respect to the valve seat and orifice, the orifice may be offset within the seat with respect to the head and diaphragm assembly, or the axes of the head and seat may be non-coaxially biased. Because the vector of the valve closing force does not align with the centerline of the valve head and diaphragm assembly, a resulting torque on the valve head keeps the head in a stable, pivoted position at all flow rates. The valve head always makes contact with the valve seat at a predetermined point during regulator operation, eliminating pressure instabilities and noise experienced in prior art pressure regulators.

Fuel pressure regulator having offset head and orifice axes

A valve seat for a fuel pressure regulator includes a valve body adapted to be disposed in the fuel pressure regulator and a passageway extending axially through the valve body. The passageway is tapered through the valve body to reduce fluid flow cavitation by limiting expansion of the fuel.

Valve seat for fuel pressure regulator

A fuel pressure regulator includes three major components, a lower housing, a control member comprising an resilient diaphragm mounted on the housing and a tubular return member mounted in a fuel return opening of the housing. The control member is preferably formed of resilient sheet metal and includes at least one annular convolution between the mounting portion and a stiff center portion configured as an inverted dome with a lower center part that acts as a valve member. The control member acts as a cover closing the internal fuel chamber and responds as a diaphragm to changes in pressure within the fuel chamber to flex upwardly by a rolling action of the convolution, which lifts the domed central portion, opening the valve and allowing excess fuel to drain through the return member. The regulated pressure is set by adjusting via sliding or threading the return member upwardly, forcing the valve seat against the valve member portion of the control member diaphragm so that the spring force of the diaphragm is preloaded to a desired value.

Fuel system pressure regulator

A fuel rail has a high pressure inlet and a low pressure outlet. The high pressure inlet feeds pressurized fuel to a plurality of injectors along the fuel rail. A fuel return line, which is connected with the low pressure outlet, is positioned substantially centrally of and coaxial with the fuel rail. The fuel return line is non-circular in configuration having a width to height ratio greater than one. The configuration of the return fuel line and the flexibility of the walls thereof provide a damper that reduces the pressure pulsations in the high pressure fuel.

Coaxial flow through fuel rail with a damper for a recirculating fuel

A pressure regulating valve including a valve seat on valve body, a valve element having a flow directing surface, and a spring biasing the valve element toward a closed position in which the flow directing surface bears against and defines a fluid seal at the valve seat. The valve element has a range of open positions in which the flow directing surface and the valve seat are progressively further separated and in which they cooperate in defining an annular flow orifice the area of which varies with the span between the valve seat and the flow directing surface. The flow directing surface redirects fluid flow upstream of the annular flow orifice through about 150.degree. to 180.degree. to induce on the valve element a force reaction which cooperates with a fluid pressure force reaction on the valve element to improve the sensitivity of the valve element to changes in fluid pressure upstream of the annular flow orifice. A skirt of the flow directing surface downstream of the annular flow orifice directs fluid flow substantially parallel to the direction of movement of the valve element to minimize the sensitivity of the valve element to a velocity induced pressure gradient across the valve element.

Pressure regulating valve

A fuel injection nozzle has a tubular body adapted to receive fuel, a tubular seat member mounted to the body, the seat member having an opening for discharging fuel and a valve seat surrounding the opening, a poppet valve member engageable with the valve seat to interrupt fuel flow through the opening, and an extension spring anchored to the body and to the valve member and biasing the valve member to engage the valve seat. The extension spring is a helically coiled spring with each coil lying close to the adjacent coils and with the coils at one end overlying an end of the body to anchor the spring to the body and to cause fuel flowing through the nozzle to pass between the coils of the spring; the spring thereby acts as a filter for fuel to be discharged by the nozzle. The seat member is axially movable relative to the body to adjust the length of the spring and thus the bias on the valve member whereby the desired valve-opening pressure differential may be established. The body is adapted to receive fuel through a restriction member that limits fuel flow through the opening. The valve member has a shank with a valve element at one end and a head at the other end, the shank being formed as a pin and the valve element as a ball that is welded to the pin.

Fuel injection nozzle

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Livonia, NY, United States of America

Grover Wesley Preston