Secondary air supply system and secondary air supply method for internal combustion engine
US9181836B2 · kind B2 · utility
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8Claims
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Key dates
| Filing date | May 25, 2012 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | May 12, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
In an internal combustion engine that includes a first secondary air supply unit having a first air pump and a first air switching valve and a second secondary air supply unit having a second air pump and a second air switching valve, a time difference is provided between the operation start timing of the first air pump and the operation start timing of the second air pump, and the open timing of the first air switching valve and the open timing of the second air switching valve are set so as to be simultaneous with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.