Method for monitoring operations of an internal combustion engine to detect combustion misses

US5619975A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Schmidt · Schwieberdingen, DE
• Manfred Mezger · Markgröningen, DE
• Walter Gollin · Heubach, DE
• Arnd-Matthias Langner · Kornwestheim, DE
• Klaus Ries-Mueller · Bad Rappenau, DE

Key dates

• Filing date: Jun 20, 1996
• Grant date: Apr 15, 1997
• Expiry date: Jun 20, 2016

Classification

• Technology area (CPC G): Physics
• CPC primary: G01M15/11
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A method is proposed for monitoring operations of an internal combustion engine to detect combustion misses for internal combustion engines having dual spark coils. A method is provided for the primary-side monitoring of the spark voltage and/or of the spark duration, and a method is provided for detecting irregular operations. If a faulty ignition is detected in one cylinder at one spark plug by monitoring the spark voltage and/or the spark duration, the second spark plug in this cylinder is then cut off (de-energized) and the reaction to this cut-off is monitored by means of the method for detecting irregular running. If the irregular running detection confirms faulty operation of the internal combustion engine, then the faulty ignition at the first spark plug of a cylinder was correctly recognized and appropriate emergency measures are introduced.