Patent ID: 6978666

Claim:
A method for calibrating a misfire detection system of an internal combustion engine, the method comprising: a) collecting a plurality of groups of sampled data points, each of the plurality of groups of sampled data points representing engine conditions and engine misfire occurrence data for a particular firing event for a vehicle test run, wherein engine conditions comprise engine speed (RPM) signals based on crankshaft angular velocity and manifold absolute pressure (MAP) signals; b) optionally generating misfire events during the collection of the plurality of groups of sampled data points, wherein misfire-event generation can be varied from zero misfire events to one-hundred percent random misfire events; c) generating a plurality of compensation parameters based on at least one of the groups of sampled data points; d) varying at least one of the plurality of compensation parameters; e) applying the compensation parameters to a misfire detection algorithm; f) comparing misfire detection results to the engine misfire occurrence data contained within the groups of sampled data points; g) selecting compensation parameters which produce a high accuracy misfire detection; and h) exporting selected compensation parameters for transport to an engine controller in an internal combustion engine.