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AssigneeStanadyne, Inc.
InventorsCharles W. Davis, Robert Raufeisen, Daniel Edwin Salzgeber
Estimating the term…
The present invention provides a liquid fuel injection pump suited for the sequential delivery of measured charges of liquid fuel under high pressure to an associated engine in timed relationship therewith comprising pump chamber means wherein the charges are pressurized to high pressure, a passage for delivering the fuel to said pump chamber means, a metering valve in said passage for reglating the amount of fuel in said measured charges of fuel, said metering valve comprising a pair of relatively movable members respectively having ports in the adjacent surfaces thereof adapted for registry, means to vary the amount of overlap of said ports in a first direction to control the quantity of fuel in each measured charge of fuel in accordance with the load on the associated engine, and means for controlling the relative movement of said members in a second direction transverse to said first direction to vary the amount of overlap of said ports in said second direction in accordance with the speed of the associated engine whereby the amount of overlap in said second direction increases with increased engine speed thereby to maintain the quantity of fuel in sequential charges of fuel at a substantially constant level for a given setting of said means regardless of changes in engine speed.
A liquid fuel injection pump suited for the sequential delivery of measured charges of liquid fuel under high pressure to an associated engine in timed relationship therewith comprising pump chamber means wherein the charges are pressurized to high pressure, a passage for delivering the fuel to said pump chamber means, a metering valve in said passage for regulating the amount of fuel in said measured charges of fuel, said metering valve comprising a pair of relatively movable members respectively having ports in the adjacent surfaces thereof adapted for registry, first means to vary the amount of overlap of said ports in a first direction to control the quantity of fuel in each measured charge of fuel in accordance with the load on the associated engine, and second means for controlling the relative movement of said members in a second direction transverse to said first direction to vary the amount of overlap of said ports in said second direction in accordance with the speed of the associated engine to increase the amount of overlap in said second direction with increased engine speed to maintain the quantity of fuel in sequential charges of fuel at a substantially constant level for a given setting of said first means regardless of changes in engine speed.
A liquid fuel injection pump suited for the sequential delivery of measured charges of liquid fuel under high pressure to an associated engine in timed relationship therewith comprising a pump housing, a rotor journaled in a bore in said pump housing, a transverse bore in the rotor forming a high pressure pump chamber, a pair of pump plungers slidably mounted in said bore, an angularly shiftable cam ring surrounding said plungers and having inwardly directed cam lobes whereby the rotation of said rotor relative to said cam translates the contour of said cam into sequential pumping strokes of said plungers, a regulating member connected to said cam ring to vary the angular position thereof, said regulating member comprising a piston mounted in a bore of the pump, a closed chamber at one end of said piston, means to control the quantity of liquid fuel contained in said closed chamber for controlling the position of said piston, and feedback means comprising a pivoted feedback beam member having a profiled surface and a stop member engageable therewith to provide a feedback signal to said means to control the quantity of fuel in said closed chamber, one of said members being mounted by said piston and the other of said members being mounted in a fixed position whereby the movement of said piston translates the profile of said profiled surface into said feedback signal.
A liquid fuel injection pump suited for the sequential delivery of measured charges of liquid fuel under high pressure to an associated engine in timed relationship therewith comprising pump chamber means wherein the charges are pressurized to high pressure, a passage for delivering the fuel to said pump chamber means, a metering valve in said passage for regulating the amount of fuel in said measured charges of fuel, said metering valve comprising a fixed cylindrical rod and a sleeve mounted around said rod for relative axial and angular movement with respect thereto, said rod and sleeve respectively having ports in the adjacent surfaces thereof adapted for registry, mechanical means to rotate said sleeve to select the amount of angular overlap of said ports, means for controlling the axial movement of said sleeve to vary the amount of axial overlap of said ports, a second valve in said passage connected in series with said metering valve and comprising a second pair of ports respectively provided by said rod and said sleeve, said second pair of ports being normally positioned in registry with each other, and means for reducing the registry of said second pair of ports when the engine exceeds a predetermined speed.
A liquid fuel injection pump suited for the sequential delivery of measured charges of liquid fuel under high pressure to an associated engine in timed relationship therewith comprising a pump housing, a rotor journaled in a bore in said pump housing, a transverse bore in the rotor forming a high pressure pump chamber, a pair of pump plungers slidably mounted in said bore, an angularly shiftable cam ring surrounding said plungers and having inwardly directed cam lobes whereby the rotation of said rotor relative to said cam translates the contour of said cam into sequential pumping strokes of said plungers, a regulating member connected to said cam ring to vary the angular position thereof, said regulating member comprising a piston mounted in a bore of the pump, a closed chamber at one end of said piston, means to control the quantity of liquid fuel contained in said closed chamber for controlling the position of said piston, and feedback means comprising a pivoted feedback beam member and a second member engageable therewith to provide a feedback signal to said means to control the quantity of fuel in said closed chamber, said members being movable relative to each other with one of said members being operatively connected for movement by said piston relative to the other of said members and one of said members having a profiled surface for engagement by the other of said members whereby the movement of said piston translates the profile of said profiled surface into said feedback signal.
Dependencies are inferred from the claim text.