On-board diagnostics for detecting the operation of diesel emissions control system
US6363713B1 · kind B1 · utility
21Cited by
10References
9Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 20, 2000 |
| Grant date | Apr 2, 2002 |
| Priority date | — |
| Expiry date | Jul 20, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An on-board diagnostic method for detecting whether a diesel emissions control system is functioning properly by continuously monitoring the temperature rise generated by the catalyst and the light-off temperature with reference to theoretical values stored in an engine control computer. When either of the parameters falls below a predetermined threshold value, the vehicle emissions may exceed emission standards and, if so, the system causes a malfunction indicator light (MIL) to be energize to advise the driver of the need for service.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.