Misfire detecting apparatus for a multi-cylinder internal combus

Details Misfire detecting apparatus for a multi-cylinder internal combus Misfire detecting apparatus for a multi-cylinder internal combus

1993-10-19

1996-08-06

Teska, Kevin J.

Boots, shoes, and leggings

36443108, 731173, 73116, 73112, 123419, 123436, 123478, G06F 1900, G01L 326

Patent

active

055440584

ABSTRACT:
A microcomputer-based misfire detecting apparatus for a multi-cylinder internal combustion engine. A crank angle sensor is coupled to the engine for detecting first and second predetermined angular intervals set before and after a predetermined reference crank position close to a TDC preceding to combustion stroke in each of the cylinders. An acceleration detector is connected to the output of the crank angle sensor for determining an acceleration based on a time ratio between times taken for a crank shaft to rotate through the first and second predetermined angular intervals, respectively, from the output signal of the crank angle sensor. A misfire occurrence detector is connected to the acceleration detector for detecting misfire occurring in the engine cylinder on the basis of the output signal of the acceleration detector.

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