Device for supplying secondary air for purifying exhaust gases discharged from internal combustion engine
US4146986A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 24, 1976 |
| Grant date | Apr 3, 1979 |
| Priority date | — |
| Expiry date | Nov 24, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M26/56
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A device for supplying secondary air in proportion to the volume of intake air into the exhaust manifold of an internal combustion engine without any adverse effects on an exhaust gas recirculation system, the device comprising a secondary air supply pipe communicated with the exhaust manifold, means for supplying secondary air through the secondary air supply pipe into the exhaust manifold, secondary air control valve means disposed in the secondary air supply pipe for controlling the flow rate of secondary air flowing therethrough, means for detecting the volume of intake air to said engine, means for detecting the volume of the secondary air flowing through the secondary air supply pipe, and means responsive to both the signal representative of the detected volume of intake air and the signal representative of the detected volume of the secondary air supply for controlling the secondary air control valve means in such a way that the secondary air supply may be in proportion to the volume of intake air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.