Exhaust emission control system for vehicle internal combustion engine
US7216479B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 17, 2003 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Aug 8, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Normally, at the time of cold-start of an internal combustion engine or the like, the flow of exhaust in an exhaust passage of the internal combustion engine is suppressed or two-stage combustion is carried out so as to promote exhaust purification in an exhaust system. However, when a correlation value of a braking force required to be generated by a vacuum type brake booster is greater than a correlation value of a braking force that can be actually generated by the vacuum type brake booster, a restricting device restricts the suppression of the exhaust flow or a two-stage combustion prohibiting device prohibits the two-combustion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.