Exhaust line allowing a faster triggering of the catalyst
US5307628A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 18, 1992 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Jun 18, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Device intended to improve the working of a catalyst (3) placed in the exhaust manifold of an internal-combustion engine, said exhaust manifold consisting of a tube (2) opening on one side into the collector (1) collecting the combustion gases coming from the cylinder(s) and covering with the other end thereof said catalyst (3). According to the invention, the device comprises: PA1 at least one pipe (8) inside said tube (2), having a first end (81) which opens in proximity to said catalyst (3), and PA1 a means (10) intended to selectively close the intertube volume (9) delimited between said inner pipe (8) and said tube (2) as a function of the temperature of the exhaust gases flowing onto said catalyst (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.