Apparatus for detecting misfire in multicylinder internal combustion engine
US4040294A · kind A · utility
18Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 1976 |
| Grant date | Aug 9, 1977 |
| Priority date | — |
| Expiry date | Sep 29, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An apparatus for detecting misfire in a multicylinder internal combustion engine, comprising a sound pick-up transducer disposed in the exhaust passage of the engine or a chamber communicating with the exhaust passage for the purpose of detecting exhaust sound, an integrating circuit for integrating an electric output of the transducer in synchronism with the rotation of the engine and a comparison circuit for comparing the output of the integrating circuit with a reference signal, thereby misfire being detected on the basis of an output of the comparison circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.