Method for controlling exhaust gas purification system and exhaust gas purification system
US8322130B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2008 |
| Grant date | Dec 4, 2012 |
| Priority date | — |
| Expiry date | Oct 18, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
When the operating state of an internal combustion engine (10) is under low load, the supply of unburned fuel is controlled by using post-injection without using in-exhaust-pipe direct injection. Under medium load, the supply of the unburned fuel is controlled by using both the post-injection and the in-exhaust-pipe direct injection. Under high load, the supply of the unburned fuel is controlled by using the in-exhaust-pipe direct injection without using the post-injection. Thus, in air-fuel ratio rich control performed during regeneration to recover the purification capability of an exhaust gas purification apparatus, both black smoke and white smoke are reduced when the supply of the unburned fuel for supplying the unburned fuel into exhaust gas is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.