Misfire detection in internal combustion engine with overlapping

Details Misfire detection in internal combustion engine with overlapping Misfire detection in internal combustion engine with overlapping

1993-12-27

1994-11-22

Williams, Hezron E.

Measuring and testing

Vehicle chassis

Steering

G01M 1500

Patent

active

053657802

ABSTRACT:
Incorrect classifications of misfires (potential false alarms) are reduced by comparing the power loss value for a particular cylinder event with the power loss values for neighboring cylinder events. A set of rules for the comparisons permits identifications of potential misfires that are, in reality, a normally firing cylinder event having a measurement that is altered by a neighboring misfire event, referred to as the pulling effect. The invention improves misfire detection accuracy, especially in internal combustion engines with 8 or more cylinders, which have substantially overlapping power strokes.

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