Gm Global Technolgoy Operations, Inc.

Delphi Technologies, Inc.

Richard Lloyd Cooper

Michael Raymond Salemi

James Zizelman

Jeffrey Mark Noll

Edwin A Rivera

Jeffrey Allan Rock

Gary John Deangelis

Harry Richard Mieney

Grover Wesley Preston

David Wesley Rogers

Daniel L Varble

Roland S Taylor

Robert Augustine Zaso

Albert Martin Knebel

Kevin J Allen

Kurt T Hertzog

Gary Robert Lippert

Anatol Avdenko

A fuel swirler plate for improving atomization of fuel in a fuel injector. A plurality of identical fuel supply passages is formed in the plate, each passage including an outer fuel reservoir region; a region having converging walls wherein fuel is accelerated and turned partially tangential to the axis of the plate and fuel injector; a metering region wherein flow is regulated; and an exit region wherein the fuel is combined with similar fuel flows from the other passages to form a high velocity swirl annulus between the swirler plate and a pintle ball of the fuel injector. An advantage of the novel swirl plate over prior art plates is that, when the injector valve is closed, only a very small volume of fuel resides in the swirl annulus between the pintle ball and the exit region of the plate, and such residual fuel is urged rotationally and becomes the leading edge of a new vortex the next time the valve is opened, thus minimizing SAC spray formation. The present invention is useful in fuel cells, burners, and in both direct injection and port injection fuel injectors of internal combustion engines.

Fuel swirler plate for a fuel injector

A fuel system including a fuel nozzle is disclosed. The fuel nozzle is adapted to receive pulsed pressurized fuel from a source and includes a valve seat assembly having a valve seat body with a longitudinally extending passage. The passage of the valve seat body has a valve seat extending thereabout and interfaces with a downstream opening valve element which is disposed within the longitudinally extending passage and operates to move into and out of sealing engagement with the valve seat to regulate the flow of pressurized fuel though the passage. The valve element has a spherically configured upstream surface for sealing engagement with the valve seat which includes an annular drag groove extending thereabout. The drag groove functions to increase viscous drag force, in the downstream opening direction, which is imparted on the valve element by fuel flow over the spherical upstream surface. The nozzle also has an annular, fuel directing orifice disc which is disposed downstream of the valve seat. The orifice disc includes fuel directing orifices which extend therethrough from a first, upstream side to a second downstream side. The annular fuel directing orifice disc limits downstream movement of the valve member and directs fuel through the orifices into a desired fuel pattern.

Poppet nozzle for fuel injection

A fuel injection system is disclosed having a fuel injection nozzle which receives pressurized fuel pulses from a source. The nozzle includes a body having a tubular nozzle body with a longitudinally extending opening extending therethrough. A valve seat is located between the upstream and downstream ends of the longitudinal opening in the valve body for engagement with a valve member to thereby regulate the flow of fuel through the opening. A downstream stop member includes a hollow cylinder with a diametrical member extending across one end. The cylindrical stop member is received over the downstream end of the nozzle body with the diametrically extending member disposed across the downstream end of the longitudinal opening to thereby limit the outward range of movement of the valve member from the opening. As a result, the valve member and the downstream end of the longitudinally extending opening define an annular fuel metering orifice therebetween to regulate the flow of fuel from the nozzle.

Fuel injection nozzle

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.

Growing community of inventors

Le Roy, NY, United States of America

Richard Lloyd Cooper