Air/fuel imbalance monitor using an oxygen sensor
US7802563B2 · kind B2 · utility
46Cited by
12References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2008 |
| Grant date | Sep 28, 2010 |
| Priority date | — |
| Expiry date | Dec 16, 2028 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/187
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Air/fuel imbalance monitoring systems and methods for monitoring air/fuel ratio imbalance of an internal combustion engine are disclosed. In one embodiment, an oxygen sensor is sampled above cylinder firing frequency and a ratio of data from at least one window over a total number of windows is determined. The approach can be used to indicate imbalances between engine cylinders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.