Patent ID: 6535810
Filing Date: 2003-03-18
Classification: F02B,F02D,F02F,G01M

Abstract:
A method of analyzing the operation of a multi-cylinder engine to identify cylinders delivering substandard performance, the method comprising:operating the engine to attain a steady-state operating temperature; operating the engine in an analysis mode at substantially constant speed or load; gathering data indicative of fuel usage of the engine cylinders when the engine is operating on all cylinders in said analysis mode; gathering data indicative of the fuel usage of the engine cylinders when the engine is operating with the operation of at least one cylinder arrested in said analysis mode until data gathering has been performed with each of the cylinders successively arrested; and analyzing said gathered data to identify the engine operations for which fuel usage was affected to a lesser degree by the arrest of cylinder operation to identify cylinders delivering substandard performance.