Westport Power Inc.

Delphi International Operations Luxembourg S.a.r.l.

Delphi Technologies, Inc.

Delphi Technologies IP Limited

Westport Fuel Systems Canada Inc.

Lukhbir Panesar

George A Meek

Anthony Thomas Harcombe

Andrew R Knight

David E Draper

Michael C Wickstone

Malcolm Lambert

David J C Law

Michael Colin Wickstone

Malcom Lambert

George Meek

A fuel injector for an internal combustion engine is disclosed. The fuel injector is particularly suitable for use as a dual fuel injector, and comprises a generally tubular outer valve needle, an inner valve needle slidably received in the outer valve needle, and a nozzle body assembly comprising a tip part and a needle guide part. The tip part defines a seating region for the outer valve needle, and the needle guide part comprises a guide bore for slidably receiving the outer valve needle. In one embodiment, a lower bore region of the needle guide part defines a cavity around the outer valve needle which houses a biasing spring for the outer valve needle and a fuel. A collar for seating the biasing spring can be dimensioned to allow free flow of the fuel from the cavity into an annular accumulator volume defined between the outer valve needle and the bore of the tip part.

Fuel injector

A gaseous fuel injector for supplying gaseous fuel to a gaseous fuel combustion engine includes an injector housing which receives an injector assembly and supplies gaseous fuel thereto. The injector housing has an inlet at a first end, a nozzle with an outlet at a second open end and a chamber between the inlet and the outlet. The injector housing includes an ignition arrangement at the second open end.

Gaseous fuel injectors

A fuel injector for an internal combustion engine is disclosed. The fuel injector is installable in a cylinder head bore of a cylinder head of the engine and has a body region arranged to be received within the cylinder head bore, and a head region arranged to extend outside the cylinder head bore to protrude from the cylinder head when the injector is installed in the cylinder head bore. The injector includes a first valve needle arranged to control the injection of a gaseous fuel from a first outlet, a second valve needle arranged to control the injection of a liquid fuel from a second outlet, a gaseous fuel inlet for admitting the gaseous fuel to the injector, and a liquid fuel inlet port for admitting the liquid fuel to the injector. The gaseous fuel inlet is disposed in the body region of the injector, and the liquid fuel inlet port is disposed in the head region of the injector. The injector can also include an internal accumulator volume so that an external fuel rail is not necessary.

A fuel injector, preferably a dual fuel injector, for an internal combustion engine is disclosed. The fuel injector comprises first and second valve needles () arranged to control the injection of first and second fuels, first and second control chambers () associated with the first and second valve needles () respectively, a first control valve () comprising a first control valve member () and arranged to vary the pressure of a control fluid in the first control chamber () so as to cause opening and closing movement of the first valve needle (), and a second control valve () comprising a second control valve member () and arranged to vary the control fluidpressure in the second control chamber () so as to cause opening and closing movement of the second valve needle (). The first and second control valve members () are arranged for linear movement along a common control valve axis.

A fuel injector () for an internal combustion engine is disclosed. The fuel injector is particularly suitable for use as a dual fuel injector, and comprises a generally tubular outer valve needle (), an inner valve needle () slidably received in the outer valve needle (), and a nozzle body assembly () comprising a tip part () and a needle guide part (). The tip part () defines a seating region () for the outer valve needle (), and the needle guide part () comprises a guide bore () for slidably receiving the outer valve needle (). In one embodiment, the tip part () and the needle guide part () are made from different materials, and a biasing spring () for the outer valve needle () is housed in the nozzle body assembly ().

A fuel injector for an internal combustion engine includes an injector body, a first actuator for controlling movement of a first valve needle for injecting a first fuel into a cylinder of the engine, and a second actuator for controlling movement of a second valve needle for injecting a second fuel into the cylinder. Each of the actuators are axially spaced along a longitudinal axis of the injector body and has a respective conductive element for carrying current to the actuator, the injector further includes an electrical connector module which has first and second electrical connectors for connection with an associated one of the conductive elements for the actuators. The electrical connector module is mounted between the first and second actuators along the longitudinal axis of the injector body.

A fuel injection system for supplying pressurized fuel to a fuel injector, the fuel injection system comprising an accumulator volume for supplying fuel at a first injectable pressure level to the fuel injector through a fuel supply passage, a pump arrangement for increasing the pressure of fuel supplied to the injector to a second injectable pressure level, and a valve arrangement operable between a first position in which fuel at the first injectable pressure level is supplied to the injector and a second position in which communication between the injector and the accumulator volume is broken so as to permit fuel at the second injectable pressure to be supplied to the injector. The injection system may include a valve arrangement in the form of a three-position valve or may include a shut off valve for controlling the supply of fuel through the fuel supply passage.

Fuel injection system

A fuel system for use in an internal combustion engine comprising a fuel pump having a pumping cycle during which fuel is pressurised to a high level within a pumping chamber for delivery to an injector. The injector is arranged to provide a primary fuel injection event, and a secondary fuel injection event within the same pumping cycle. The injector includes a valve needle which is engageable with a valve needle seating to control fuel delivery and an injection control valve arrangement for controlling movement of the valve needle so as to control the primary and secondary fuel injection events. The fuel system further comprises an accumulator volume for storing high pressure fuel for delivering the secondary fuel injection quantity, and additional valve arrangement for controlling the supply of fuel stored within the accumulator volume to the injector for the secondary injection event.

Growing community of inventors

Feltham, United Kingdom

Lukhbir Panesar