Method and apparatus for determining oxygen storage capacity time of a catalytic converter
US6694243B2 · kind B2 · utility
15Cited by
16References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2001 |
| Grant date | Feb 17, 2004 |
| Priority date | — |
| Expiry date | Jan 19, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An on-board catalyst diagnostic for monitoring the conversion efficiencies of a catalytic converter by measuring the oxygen storage capacity (OSC) of the converter. The measurement of the OSC indicates the degree of health of the converter. Under the same engine running conditions, the greater the OSC measurement, the healthier the converter. A modeled OSC is compared to the real OSC to determine a normalized OSC. The normalized OSC is compared to a predetermined threshold value in order to determine the health of the converter. The modeled OSC takes into consideration variables which will affect the value of the OSC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.