Conversion efficiency measuring apparatus of catalyst used for exhaust gas purification of internal combustion engine and the method of the same
US5237818A · kind A · utility
22Cited by
3References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Mar 19, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A conversion efficiency of a catalyst is estimated by a correlation function concerning output signals of upper and down stream side air fuel ratio sensors. The conversion efficiency is measured by comparing the correlation function and a complement value of the correlation function with a comparing standard value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.