Misfire-detecting system for internal combustion engines
US5221904A · kind A · utility
13Cited by
7References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1992 |
| Grant date | Jun 22, 1993 |
| Priority date | — |
| Expiry date | Mar 5, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02P2017/003
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A misfire-detecting system detects a misfire occurring in an internal combustion engine in such a manner that a value of discharge current is detected when sparking voltage is generated in response to an ignition command signal, the detected value of discharge current is compared with a predetermined current value, and it is determined that a misfire has occurred when a time period over which the detected discharge current value after generation of the ignition command signal is above the predetermined current value is shorter than a predetermined time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.