Method for identifying misfirings in a piston internal combustion engine
US6425355B1 · kind B1 · utility
4Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Jul 30, 2002 |
| Priority date | — |
| Expiry date | Aug 24, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L2009/4096
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for recognizing misfires in a piston-type internal-combustion engine with spark ignition and an engine control unit (ECU) for actuating electromagnetic actuators to operate the cylinder valves. The time difference between the opening time preset by the engine control unit and the actual opening time of an exhaust valve is detected as the actual value, then compared to a preset tolerance-time difference as the nominal value, and a signal is generated if this nominal value is not met, i.e., the nominal value exceeds the actual value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.