Exhaust gas purification system and method
US6928809B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2004 |
| Grant date | Aug 16, 2005 |
| Priority date | — |
| Expiry date | Jan 7, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/30
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exhaust gas purification system includes a particulate filter, a sensor that detects a filter differential pressure and a controller that controls regeneration of the particulate filter. The controller is programmed to execute a control for burning particulate accumulated on the particulate filter, determine whether regeneration of the particulate filter is completed, detect, in cooperation with the sensor, a filter differential pressure immediately after it is determined that regeneration of the particulate filter is completed, and estimate an ash accumulation amount based on the detected filter differential pressure. An exhaust gas purification method is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.