Carburetor with diaphragm type fuel pump
US6394424B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2001 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Jun 4, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/68
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
For a four-stroke engine, a carburetor with a fuel pump diaphragm which defines a fuel pump chamber on one side and a pressure pulse chamber on its other side in communication with the engine to receive pressure pulses which actuate the fuel pump diaphragm to draw fuel into the carburetor and to discharge fuel under pressure to a downstream fuel metering assembly. An air passage communicates an air supply with the pressure pulse chamber to provide an air flow within the pressure pulse chamber which sweeps away, dries out or aerates and removes any liquid fuel within the pressure pulse chamber to avoid puddling of liquid fuel therein. In one form, a throttle valve carried by the carburetor body for movement between idle and wide open positions also actuates a valve which controls the flow of fluid through the air passage as a function of the position of the throttle valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.