Device for evaluating catalyst performance deterioration
US5722238A · kind A · utility
4Cited by
2References
14Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 22, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Oct 22, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A device for evaluating catalyst performance deterioration includes an air-fuel ratio sensor and a temperature sensor. The degree of catalyst performance deterioration per unit time is calculated based on the concentration of oxygen in the exhaust gas and the temperature of the catalyst. The deterioration of the catalyst is evaluated on the basis of the accumulated value of the degree of catalyst performance deterioration per unit time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.