Method for checking the efficiency of a catalytic converter
US5673555A · kind A · utility
10Cited by
3References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 27, 1995 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Nov 27, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method is provided for checking the efficiency of a catalytic converter with an oxygen probe upstream of the catalytic converter and of an oxygen probe downstream of the catalytic converter. A ratio of times in which the oxygen probe downstream of the catalytic converter and the oxygen probe upstream of the catalytic converter indicate a rich or a lean mixture value is formed. The catalytic converter has a sufficient efficiency if the value of the smaller amount of the ratio values is lower than a predeterminable limit value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.