Misfire detecting apparatus for a multi-cylinder internal combustion engine
US5544058A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1993 |
| Grant date | Aug 6, 1996 |
| Priority date | — |
| Expiry date | Oct 19, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.