EGR controller for internal combustion engine
US9458785B2 · kind B2 · utility
0Cited by
6References
4Claims
0Family size
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Key dates
| Filing date | Jun 6, 2012 |
| Grant date | Oct 4, 2016 |
| Priority date | — |
| Expiry date | Sep 5, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
While an engine is an idling state and an EGR opening degree is increased stepwise from a specified opening degree, a variation in engine speed (a standard deviation in engine speed) is repeatedly computed. After that, a specified step amount is successively reduced from the EGR opening degree and the variation in engine speed is successively computed until the EGR opening degree becomes less than or equal to a specified value. Then, a maximum value of the EGR opening degrees where the variation in engine speed becomes minimum is learned as the full-close position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.