Control method of exhaust emission purification system and exhaust emission purification system
US8453432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2007 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Jun 5, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust emission purification system having a controller performing exhaust temperature rise control including multistage delay injection control for raising the exhaust temperature, if the exhaust gas temperature is lower than a predetermined judgment temperature, and performing particulate matter combustion removal control including post injection control, if the exhaust gas temperature becomes equal to or higher than the predetermined judgment temperature, when forced regeneration of a diesel particulate filter is carried out. The multistage delay injection control is forbidden when an idle operation state of an internal combustion engine occurs for a predetermined judgment time and a power take-off device is operating. A control method for exhaust emission purification is also provided sustaining a diesel particulate filter for purifying particulate matter in exhaust gas by executing forced regeneration while avoiding variation in engine speed, even if the power take-off device is operating during an extended idling operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.