Catalyst degradation detecting device and method thereof in internal combustion engine
US6797517B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2000 |
| Grant date | Sep 28, 2004 |
| Priority date | — |
| Expiry date | Apr 28, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
It is an object of the present invention to contribute to prevention of worsening an exhaust gas emission at the time of cold starting up of an internal combustion engine by providing a technology for accurately determining the degradation of an exhaust gas purifying catalyst provided in an exhaust passage of the internal combustion engine, specifically, the degradation of a low temperature activation capability of the exhaust gas purifying catalyst. In order to achieve this object, the catalyst degradation detecting device of the internal combustion engine of the present invention includes an adsorbent provided in the exhaust passage at downstream of the exhaust gas purifying catalyst, for adsorbing a predetermined component contained in the exhaust gas when a temperature is lower than a predetermined temperature range, and desorbing the adsorbed predetermined component when the temperature is within the predetermined temperature range; an adsorbing amount detector for detecting the amount of the predetermined component adsorbed in the adsorbent; and a catalyst degradation determining device for determining the degradation of the exhaust gas purifying catalyst based on a predeterm…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.