Internal combustion engine secondary air control system
US4152893A · kind A · utility
5Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 23, 1977 |
| Grant date | May 8, 1979 |
| Priority date | — |
| Expiry date | May 23, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7738
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A secondary air control system for an internal combustion engine having an exhaust system provided with exhaust gas treating means adapted for secondary air injection and including a relief valve includes a mechanism which keeps the relief valve open after the valve is opened by a predetermined pump discharge pressure, until a predetermined lower pressure is reached.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.