Misfire detection system for internal combustion engine

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

2007-01-02

2007-01-02

Vo, Hieu T. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C073S117020

Reexamination Certificate

active

11316984

ABSTRACT:
In a misfire detection system for an internal combustion engine, a product is calculated at every predetermined crank angle by multiplying a value retrieved from a periodic function defined to model torque generation of individual cylinders synchronously with each combustion cycle, by a detected crank angle velocity, and the product is integrated over a predetermined interval to calculate an integral. The integral is then compared with a predetermined value and is detected whether misfire has occurred in one of the individual cylinders, thereby enabling to detect misfire even when misfire occurs successively in a multiple cylinder engine, identify the misfiring cylinders with good accuracy.

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