EGR control apparatus and method for operating the same
US7370644B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 2006 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Jun 1, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An ECU calculates a foreign-matter accumulation index base on a total flow rate of EGR gas integrated since the previous execution of a last foreign-matter removal operation until the present execution of the foreign-matter removal operation. The ECU controls an actuator for operating an EGR valve and a number of the actuations of the EGR valve on the basis of the foreign-matter accumulation index. When the total flow rate of the EGR gas increases, the quantity of foreign matters contained in EGR gas correspondingly increases. Therefore, as the foreign-matter accumulation index becomes larger, the actuation intensity of the EGR valve is set higher and the number of the actuations of the EGR valve is set larger. As a result, the removal operation of foreign matters can be efficiently executed in accordance with the deposition intensity or the deposition quantity of foreign matters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.