Proportional fuel vapor purge flow control apparatus
US4133328A · kind A · utility
2Cited by
2References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 5, 1977 |
| Grant date | Jan 9, 1979 |
| Priority date | — |
| Expiry date | Jul 5, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0836
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a fuel vapor recovery system for an internal combustion engine, a proportional fuel vapor purge flow control apparatus is used to regulate the flow of a fuel vapor-air mixture to the induction system of the engine, the flow control apparatus including a variable area flow control valve which is diaphragm operated by exhaust back pressure to provide a canister purge flow area which is proportional to exhaust back pressure and a vacuum regulator operative to provide a constant pressure differential across the variable area valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.