Air-fuel ratio feedback control system having single air-fuel ratio sensor downstream of or within three-way catalyst converter
US5172320A · kind A · utility
9Cited by
3References
64Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 1, 1990 |
| Grant date | Dec 15, 1992 |
| Priority date | — |
| Expiry date | Mar 1, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In an air-fuel ratio feedback system including a single air-fuel ratio sensor downstream of or within a three-way catalyst converter, a coarse-adjusting term AF.sub.c is calculated integrally in accordance with the output of the air-fuel ratio sensor, and an O.sub.2 storage term AF.sub.CCRO is calculated in accordance with an O.sub.2 storage amount of the three-way catalyst converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.