Misfire detection system for internal combustion engine

Details Misfire detection system for internal combustion engine Misfire detection system for internal combustion engine

2007-11-13

2007-11-13

McCall, Eric S. (Department: 2855)

Measuring and testing

Vehicle chassis

Steering

C701S111000

Reexamination Certificate

active

11471518

ABSTRACT:
When a fuel cut command is issued, a time required for a crankshaft of each cylinder to rotate through a certain angle is stored in one memory per cylinder. In a stage of engine production, a combustion variation per cylinder is stored in another memory. When fuel is supplied, a particular component is extracted from a value obtained by subtracting the sum of the time required for the rotation in a non-combustion state and the combustion variation from the time required for the rotation corresponding to a cylinder determined to be in a combustion stroke. The occurrence of a misfire is determined when the extracted particular component exceeds a threshold.

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European Search Report dated Sep. 29, 2006 (Four (4) pages).

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