Exhaust gas purification apparatus in combustion engine
US6334306B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 28, 1999 |
| Grant date | Jan 1, 2002 |
| Priority date | — |
| Expiry date | May 28, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A three-way catalytic converter 42 and a combined catalytic-hydrocarbon adsorbent 43 are arranged in an exhaust manifold 32 of an engine 11. The three-way catalytic converter 42 and the combined catalytic-hydrocarbon adsorbent 43 are arranged adjacent to each other in series from an upstream. A pulsing stream of the exhaust gas is kept strong at the point where combined catalytic-hydrocarbon adsorbents 42 are arranged. Thus, hydrocarbons desorbed from the combined catalytic-hydrocarbon adsorbents 42 are strongly affected by an action of a pulsing stream of the exhaust gas, and hydrocarbons desorbed from the combined catalytic-hydrocarbon adsorbent 43 flow backward in the direction of the three-way catalytic converter 42. Consequently, hydrocarbons desorbed from the combined catalytic-hydrocarbon adsorbent 43 are given a chance to contact with the three-way catalytic converter 42 again, and are oxidized with the three-way catalytic converter 42.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.