Method and apparatus for performance enhancement of the manifold catalyst in the automotive exhaust system
US5685145A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1995 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Feb 7, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2250/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
In an exhaust gas system comprising a hydrocarbon trap (28) and a downstream catalyst zone (30), a heat exchange catalyst member (10) is incorporated into the system to provide heat exchange between the exhaust gas and air that is pumped through the heat exchange catalyst member (10). The heated air is injected into the exhaust gas stream to facilitate the oxidation of hydrocarbons in the downstream catalyst zone. The heat exchange catalyst member (10) defines two separate flow paths therethrough, one of the flow paths containing a catalyst zone for the exhaust gas. In an alternative embodiment, the injected air is heated by a heat exchange trap (28') or by a separate heating element (62).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.