Dual check fuel injector and fuel system using same

Patent metadata

Field	Value
Publication number	US-9068539-B2
Application number	US-201213566321-A
Country	US
Kind code	B2
Filing date	Aug 3, 2012
Priority date	Aug 3, 2012
Publication date	Jun 30, 2015
Grant date	Jun 30, 2015

Abstract

A fuel injector includes a first check valve member that seats on an injector body, and a second check valve member that seats on the first check valve member covers a first nozzle outlet set when in a closed position. When the first check valve member moves to an open position, gaseous fuel is injected through both a first nozzle outlet set and a second nozzle outlet set. When the second check valve member moves to an open position, liquid fuel moves through a through passage defined by the first check valve member to facilitate injection of the second nozzle outlet set. The first and second check valve members may be controlled by first and second control valves, respectively.

First claim

What is claimed is:

1. A fuel injector comprising:
an injector body defining a first fuel type inlet, a second fuel type inlet, a first nozzle outlet set, a second nozzle outlet set and a drain outlet, and having disposed therein a first control chamber and a second control chamber;
a first check valve member defining a through passage and being positioned entirely inside the injector body with a closing hydraulic surface exposed to a fluid pressure in the first control chamber,…

Assignees

• Coldren Dana R
• Caterpillar Inc

Inventors

• Coldren Dana R

Classifications

• F02M47/043

  Mechanical Engineering · mapped topic

• F02M61/1846

  Mechanical Engineering · mapped topic

• F02M61/165

  Mechanical Engineering · mapped topic

• F02M45/086

  Mechanical Engineering · mapped topic

• Y02T10/36

  Cross-Sectional Technologies · mapped topic