Variable throat venturi apparatus for mixing and modulating liquid fuel and intake air to an internal combustion engine
US3949025A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1974 |
| Grant date | Apr 6, 1976 |
| Priority date | — |
| Expiry date | Jan 4, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/58
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Discharge velocity of the air-fuel mixture being supplied through a variable venturi flow passage device to an internal combustion engine at idle to near idle operation of the engine is optimized by controllably varying the area ratio between the throat and exit planes of the device. Opposite jaw faces of the device define the flow passage that is gradually opened and closed in correlation to demand imposed on the engine between idle and full throttle operation. Area ratio control in one form is achieved by apparatus operative to selectively vary the diffuser angle between the opposing jaw faces. Area ratio control in another form is achieved by apparatus operative to effect a localized passage opening at idle of selectively different aspect ratio than the aspect ratio defined over the full longitudinal extent of the jaw faces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.