Patent · US Active

Method to detect a contaminated fuel injector

US7370521B1 · kind B1 · utility

6Cited by

4References

23Claims

0Family size

Assignee

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US

Inventors

Nils Sandmann · Havelsee, DE
Noboru Takahashi · Nagoya, JP
Douglas E. Trombley · Grosse Pointe, US
Jeffrey J. Allen · Kelkheim, DE
Dietmar Mueller · Riedstadt, DE
Thomas Wagner · Wattenscheid, DE
Toshio Ichimasa · Fujisawa, JP
Yoshiki Torii · Sagamihara, JP

Key dates

Filing date	Oct 25, 2006
Grant date	May 13, 2008
Priority date	—
Expiry date	Nov 25, 2026

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF02M2200/24
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

A method of diagnosing a fuel injector of an engine system as contaminated is provided. The method comprises: recording a first fuel injection quantity; commanding a fuel rail pressure high; recording a second fuel injection quantity while the fuel rail pressure is high; and diagnosing the fuel injector as contaminated if the first fuel injection quantity is greater than the second fuel injection quantity.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.