Combination catalytic converter and muffler for an exhaust system
US4209493A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 3, 1979 |
| Grant date | Jun 24, 1980 |
| Priority date | — |
| Expiry date | Jan 3, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A combination muffler and catalytic converter for an exhaust system. The unit comprises an outer housing having an inlet to receive exhaust gases, and a venturi is located within the housing and provides an aspirating effect to draw air into the housing from the atmosphere for the catalytic conversion. The venturi includes a diverging conical outlet section, and the gases are discharged from the outlet section through a plurality of perforations which aids in obtaining a uniform distribution of the gases to the catalytic unit that is located centrally of the housing. After passing through the catalytic unit, the gases are discharged from the housing through a discharge pipe having a closed inner end and perforations in its wall through which the gases flow. The perforated discharge pipe provides a self-controlling system which prevents overheating of the catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.