Method for the post-injection of hydrocarbon-, alcohol- and/or reducing-agent-type regeneration solution (e.g. diesel fuel and/or urea and/or ammoniacal solution) for the regeneration of diesel engine exhaust gas filtration systems
US7481045B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Dec 23, 2003 |
| Grant date | Jan 27, 2009 |
| Priority date | — |
| Expiry date | Dec 23, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2610/1493
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A post-injection method for the regeneration of a device used to filter diesel engine exhaust gases. The method includes injecting a fully-pulverized hydrocarbon-, alcohol- and/or reducing-agent-type regeneration solution upstream of the oxidation catalyst (14) to increase the exhaust gases' temperature upon detection of clogging of the filter with particles. A computer uses temperature (2) and pressure (3) sensors disposed upstream of the filtration device to control injection of the regeneration solution from an electromagnetic injector (9). The regeneration solution is directed through a capillary (12) into the exhaust pipe (1) at a point located at a good distance from the injector, upstream of the catalyst (5), in order to be finely pulverized by the air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.