Method of monitoring hydrocarbon levels in a diesel particulate filter
US8407985B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2009 |
| Grant date | Apr 2, 2013 |
| Priority date | — |
| Expiry date | Sep 23, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
In a method of determining hydrocarbon slip through a diesel oxidation catalyst for an engine having an electronic control module and an exhaust system having a diesel oxidation catalyst and a diesel particulate filter, the electronic control module receives data indicative of a temperature of a diesel oxidation catalyst input, a temperature of a diesel oxidation catalyst output, and a temperature of a diesel particulate filter output. An energy conversion ratio is calculated with the electronic control module using the data indicative of the temperature of the diesel oxidation catalyst input, the temperature of the diesel oxidation catalyst output, and the temperature of the diesel particulate filter output. The calculated energy conversion ratio is compared to stored energy conversion ratio in a memory accessed by the electronic control module. An estimate of hydrocarbon slip through the diesel oxidation catalyst is generated with the electronic control module based upon the comparison of the calculated energy conversion ratio to stored energy conversion ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.