Fuel control for robust detection of catalytic converter oxygen storage capacity
US7793489B2 · kind B2 · utility
29Cited by
9References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2005 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | Jun 17, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An oxygen storage capacity (OSC) monitoring system for a vehicle having a catalytic converter includes an inlet oxygen sensor that generates an inlet sensor signal (ISS) based on an oxygen content of exhaust flowing into the catalytic converter. A control module receives the ISS, increases a closed loop fuel control gain during a first period and determines a fuel control factor based on the ISS during the first period. The control module determines an OSC when an average value of the fuel control factor is greater than a first value and is less than a second value during the first period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.