Patent ID: 6520159
Filing Date: 2003-02-18
Classification: F02D

Abstract:
A method for controlling engine parameters during an engine cylinder misfire in at least one cylinder of a multi-cylinder internal combustion engine, the method comprising the steps of:detecting a cylinder misfire in at least one cylinder of a multi-cylinder engine; counting the number of misfires in each cylinder on a cylinder by cylinder basis; integrating the positive change in misfire count for each cylinder over time; establishing a first threshold based on the integrated misfire count for each cylinder; establishing a second threshold for a short term fuel control signal adjusting the flow of fuel to each cylinder of the engine; comparing the integrated misfire count and the short term control signal with the first and second thresholds, respectively; and if the first and second thresholds are exceed at substantially the same time, shutting off fuel to at least one cylinder of the engine in which the misfire is occurring.