Secondary air supply system and secondary air supplying method of internal combustion engine
US8429902B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 17, 2008 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Feb 22, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A secondary air supply system includes a secondary air supply device that supplies secondary air to the upstream side of an exhaust emission control device installed in an exhaust system of an internal combustion engine, and an ECU that estimates the secondary air temperature, and estimates the exhaust gas temperature after supply of secondary air, based on the result of estimation. The ECU starts or inhibits supply of secondary air by the secondary air supply device, depending on the result of estimation of the exhaust gas temperature. It is thus possible to prevent discharge of unburned fuel components, by estimating the exhaust gas temperature after supply of secondary air in view of the secondary air temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.