Misfire detection system for an internal combustion engine

US5357788A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Anton Kantschar · Lambach, DE
• Martin Klenk · Munich, DE
• Christian Kohler · Dresden, DE

Key dates

• Filing date: May 14, 1993
• Grant date: Oct 25, 1994
• Expiry date: May 14, 2013

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2200/702
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A misfire detection system for an internal combustion engine is disclosed with the system being used to evaluate wheel rpm fluctuations. This system detects a rough roadway over which the misfire detection is to be inhibited. This detection is made with the aid of wheel rpm signals; that is, signals as they are present for all motor vehicles equipped with anti-locking brake systems and for motor vehicles which utilize the wheel rpm signal for determining road speed. In motor vehicles of this kind, the advantage is provided that the wheel rpm signal has a double use. The advantage is provided that a reliable detection of a rough roadway is possible for all motor vehicles independently of whether wheel rpm signals are used for inhibiting the misfire detection or not.