Air intake side secondary air supply system for an internal combustion engine
US4648374A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 1985 |
| Grant date | Mar 10, 1987 |
| Priority date | — |
| Expiry date | Sep 26, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The so called air intake side secondary air supply system for an internal combustion engine having a choke valve in an intake air passage supplies an air intake side secondary air into the intake air passage so that the air-fuel ratio is feedback controlled. During a period of cold operation of the engine in which the choke valve is actuated to close the intake air passage, the supply of the air intake side secondary air is stopped to enrich the air-fuel ratio upon detection of a no-load operating condition of the engine such as in the case where clutch is disengaged or in the case where the shift position of the transmission is the neutral position or the parking position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.