Integrated feedback controlled secondary air injection and egr
US5271221A · kind A · utility
7Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1992 |
| Grant date | Dec 21, 1993 |
| Priority date | — |
| Expiry date | Dec 7, 2012 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/61
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An integral system controls exhaust gas recirculation and secondary air injection for an internal combustion engine. An air pump is coupled to the exhaust manifold through a series combination of a secondary air control valve, a check valve and an orifice for measuring flow. An intake manifold is coupled to the exhaust manifold through an exhaust gas recirculation flow control valve and the orifice. A vacuum source is selectively coupled to the secondary air control valve and the EGR flow control valve for introducing secondary air to the exhaust manifold or introducing exhaust gas recirculation to the intake manifold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.