Engine misfire detection system
US7031828B1 · kind B1 · utility
14Cited by
9References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2003 |
| Grant date | Apr 18, 2006 |
| Priority date | — |
| Expiry date | Aug 28, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/1015
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An engine misfire detection system includes a database of engine fingerprints, each fingerprint corresponding to a known misfire condition. A technician uses software to compare the fingerprints in the database to an engine with a combustion inefficiency to determine which cylinder in the engine has the combustion inefficiency. The fingerprints are generated by evaluating an output from a lambda sensor and a timing reference. An alternate embodiment associates oxygen sensors with each of the cylinders in the engine and infers combustion inefficiency when a given sensor detects a peak in the amount of oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.