Method for selectively testing for leakage of combustion chambers of cylinders of internal combustion engines

US5945593A · kind A · utility

Assignee

• Aft Atlas Fahrzeugtechnik GmbH · DE

Inventors

• Ralf Magiera · Neuenrade, DE
• Christof Howold · Sundern, DE

Key dates

• Filing date: Aug 14, 1997
• Grant date: Aug 31, 1999
• Expiry date: Aug 14, 2017

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02D2200/1015
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

The invention relates to a method for selectively testing leakage of combustion chambers in cylinders of internal combustion chambers when the engine is operated with the combustion process suppressed. The internal combustion engine is provided with means for measuring the crank shaft rotation angle and for measuring the instantaneous rotational speed of the crank shaft and wherein the leakage of the combustion chambers is tested during expansion of the gas mixture during the combustion stroke and/or during compression of the gas mixture during the compression stroke of the cylinders of the internal combustion engine.