Exhaust gas purifying apparatus
US5455012A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1994 |
| Grant date | Oct 3, 1995 |
| Priority date | — |
| Expiry date | Mar 24, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01N2330/06
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
In an exhaust gas purifying apparatus including first and second exhaust converters composed of a honeycomb catalytic substrate, arranged in sequence from an exhaust manifold downstream along exhaust gas flow of an engine, wherein the catalytic substrate of the first converter has a heat capacity of not exceeding 0.5 J/K per 1 cm.sup.3 in temperatures ranging from room temperature up to 300.degree. C., and the catalytic substrate of the second converter has a geometric surface area of at least 25 cm.sup.2 /cm.sup.3. The first converter purifies exhaust gas immediately after starting up and before completion of warming up of the engine, and the second converter further purifies noxious contents still remaining as being beyond capacity of the first converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.