Exhaust cleaning apparatus and method thereof
US8122705B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2007 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | May 8, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An internal combustion engine of a vehicle is provided with an exhaust cleaning apparatus and control method. In the exhaust cleaning apparatus and method, exhaust from a combustion chamber is conducted to a main catalytic converter disposed in a main exhaust channel. A fuel cutting operation is performed upon determining a deceleration state in the vehicle and establishment of a condition for stopping fuel supply to the engine. Then, a main-channel blocking device closes the main exhaust channel so that the exhaust flows through a bypass catalytic converter disposed in a bypass exhaust channel upstream from the main catalytic converter and then merges again with the main exhaust channel upstream from the main catalytic converter after the fuel cutting operation and upon determining one of either an elapsed of a prescribed period of time, or an air-fuel ratio of the exhaust reaching a stable state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.