System for purifying the exhaust gases of diesel engines
US5067319A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Feb 13, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A system for purifying the exhaust gases of a diesel engine comprises an exhaust gas line, which is branched to form two branch lines, which are adapted to be shut off in alternation by change-over valve means. One of said branch lines constitutes a filter line, which incorporates a soot filter. The other branch line constitutes a by-pass line. Downstream of the soot filter the filter line joins the by-pass line to form a common end line. In dependence on the load on the engine, the filter line is opened by the change-over valve means only during an operation of the engine under a full load or under a partial load in excess of a predetermined value. In order to ensure that the exhaust gas will almost entirely be purified during an operation of the engine throughout its load range, an diesel soot oxidation-inducing catalyst is provided downstream of the change-over valve means and is incorporated in the by-pass line or in the common end line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.