Patent · US Active

Method and device for diagnosing an internal combustion engine; computer program and computer program product

US8091538B2 · kind B2 · utility

17Cited by

7References

13Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Dirk Hartmann · Aßling, DE
Winfried Langer · Schützingen, DE
Armin Huber · Esslingen am Neckar, DE

Key dates

Filing date	Aug 11, 2009
Grant date	Jan 10, 2012
Priority date	—
Expiry date	Jul 21, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/30
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

In a method for diagnosing an internal combustion engine having first and second fuel injectors, if a misfire is detected, the following steps are performed in sequence: a first fuel quantity of the fuel is introduced only by the first fuel injector; a check is performed to determine whether a misfire results from the introduction of a first fuel quantity in the first step; a second fuel quantity of the fuel is introduced only by the second fuel injector; a check is performed to determine whether a misfire results from the introduction of the second fuel quantity in the third step; and an engine error is diagnosed if a misfire was detected in the second or in the fourth step.

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