Exhaust gas purification apparatus of internal combustion engine
US6560959B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2000 |
| Grant date | May 13, 2003 |
| Priority date | — |
| Expiry date | Dec 6, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An upstream-side catalyst is provided at a location in close to an exhaust manifold of an engine. An HC absorbent and a downstream-side catalyst are installed in series at the downstream side. With the upstream-side catalyst put in an inactive state, the HC absorbent absorbs HC having passing through the upstream-side catalyst. After the upstream-side catalyst has been activated, HC released from the HC absorbent is refluxed to the upstream side of the upstream-side catalyst through a reflux path to be removed by the upstream-side catalyst. At that time, the ECU executes catalyst-early-warming control right after an engine start in order to raise the temperature of the upstream-side catalyst at an early time so as to shorten the time it takes to activate the upstream-side catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.