Apparatus for detecting misfire in multicylinder internal combustion engines
US5263364A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1992 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Nov 5, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/1015
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for detecting occurrence of misfire in a multicylinder internal combustion engine detects a rotational speed of the engine in each expansion stroke of each cylinder, calculates a change of the engine rotational speed fluctuation quantity in accordance with a value of the detected rotational speed, and sets a misfire determination value for each cylinder based upon a determination result of the engine operating condition. Misfire determination is made for each cylinder based upon the misfire determination value for each cylinder and the change of the rotational speed fluctuation quantity, thereby elevating the accuracy of detecting occurrence of misfire in each cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.