Method for triggering a regeneration event in a particulates filter of an internal combustion engine
US7930880B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2008 |
| Grant date | Apr 26, 2011 |
| Priority date | — |
| Expiry date | Jan 26, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N3/023
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for triggering a new regeneration event in a soot-trapping particulates filter disposed in an exhaust gas stream of an internal combustion engine, comprising the steps of determining instantaneous engine speed and engine load; determining instantaneous mass fractions for wet soot and for dry soot in the exhaust gas stream for the instantaneous engine speed and load; determining instantaneous concentrations of wet and dry soot particles in the exhaust gas; determining the rates of accumulation of wet soot and dry soot in the particulates filter; determining the total amounts of wet soot and dry soot accumulated in said soot-trapping device during all engine operation conditions since the latest previous regeneration event; and triggering the new regeneration event when the total amount of wet soot and dry soot exceeds a permissible value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.