Gaseous fuel injectors

Patent metadata

Field	Value
Publication number	US-10683829-B2
Application number	US-201615780378-A
Country	US
Kind code	B2
Filing date	Dec 1, 2016
Priority date	Dec 1, 2015
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

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.

First claim

The invention claimed is:

1. A gaseous fuel injector for supplying gaseous fuel to a gaseous fuel combustion engine, the gaseous fuel injector comprising:
an injector housing adapted to receive an injector assembly and supply the gaseous fuel thereto, the injector housing having a nozzle body, an inlet at a first end, a nozzle with spray apertures at a second open end, a chamber between the inlet and the spray apertures, and an ignition arrangement at the second open end;
wherein the nozzle is adapted to comprise the ignition arrangement comprising a primary electrode thereof;
wherein the nozzle comprises an outer coating of an electrical insulator material forming an insulating ring around the nozzle body along a length of the nozzle body;
wherein the nozzle comprises a heat shield comprising a sleeve around the insulating ring; and
wherein the sleeve of the heat shield comprises a short cone section extending downwardly at the second open end of the nozzle to define a small annular cavity terminating below the insulating ring and just above the spray apertures, wherein a lower-most end of the short cone section has an inner periphery which terminates just above the spray apertures.

2. The gaseous fuel injector according to claim 1 , wherein the sleeve of the heat shield forms the primary electrode by comprising a current conducting material.

3. The gaseous fuel injector according to claim 1 , wherein the nozzle body forms the primary electrode by comprising a current conducting material.

4. The gaseous fuel injector according to claim 3 , wherein the current conducting material comprises copper and is connected to an insulated coaxial cable adapted to deliver a current thereto.

Assignees

• Delphi Tech Ip Ltd

Inventors

• Panesar Lukhbir
• Lambert Malcolm

Classifications

• H01T13/40

  structurally combined with other devices (combined or associated with fuel injectors F02M57/06; structurally combined with other parts of internal-combustion engines F02P13/00) · CPC title

• H01T13/00

  Sparking plugs · CPC title

• F02M21/0296

  Manufacturing or assembly; Materials, e.g. coatings · CPC title

• Y02T10/30

  Use of alternative fuels, e.g. biofuels · CPC title

• F02M21/0275 Primary

  for in-cylinder direct injection, e.g. injector combined with spark plug · CPC title