Patent · US Expired

Method for detecting combustion misfires in a multi-cylinder internal combustion engine

US6450017B2 · kind B2 · utility

0Cited by

3References

4Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Heiko Oertel · Ditzingen, DE
Andrea Lohmann · Forstau, AT
Juergen Schwabe · Echterdingen, DE
Ralf Schnee · Eberdingen, DE
Uwe Buck · Eßlingen, DE
Peter Wiltsch · Riedlingen, DE
Heinz Viel · Kaisersbach, DE

Key dates

Filing date	Jan 16, 2001
Grant date	Sep 17, 2002
Priority date	—
Expiry date	Mar 16, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG01M15/11
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a method for detecting combustion misfires in a multi-cylinder internal combustion engine. Combustion misfires are detected from data for the rough running of individual cylinders via a comparison with threshold values at operating points stored in a characteristic field. These data are determined within the engine. The combustion misfire detection is suppressed below an rpm-dependent zero-load characteristic line. The zero-load characteristic line is continuously adapted to the actually present lowest load at corresponding rpm values during vehicle operation.

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