Ignition circuit monitoring in an internal combustion engine

US5134987A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Ulrich Mayer · Weißenhorn, DE
• Karl Ott · Markgröningen, DE
• Joerg Fuchs · Schwieberdingen, DE
• Immanuel Krauter · Munderkingen, DE

Key dates

• Filing date: May 17, 1991
• Grant date: Aug 4, 1992
• Expiry date: May 17, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P17/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to ignition circuit monitoring in an internal combustion engine, where a sensor signal is generated in the course of each ignition by an ignition current sensor (5), which is supplied via a pulse shaper (6) to a memory unit (7). An ignition computer (4) reads out the contents of the memory following each ignition or each sensor signal and resets the memory unit (7) prior to the next ignition. Thus, when the sensor signal is missing, the ignition computer (4) detects the lack of ignition and an appropriate control signal is made available for control actions.