Mechanical air fuel ratio regulating carburetor with fuel pressure regulation
US7744066B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 18, 2005 |
| Grant date | Jun 29, 2010 |
| Priority date | — |
| Expiry date | Apr 2, 2026 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M19/00
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A carburetor includes an air inlet with a mechanically adjustable air valve, a mechanically adjustable atomizer discharging in the air inlet, and a mechanical metering device connected with the air valve and the atomizer, maintaining a stoichiometric ratio between amounts of air and fuel. Additionally, the carburetor includes a fuel pressure regulating unit to regulate the fuel pressure of fuel injected in the air inlet, based on one or more dynamic engine load parameters under which a vacuum signal in the air inlet is obtained via a vacuum intake conduit discharging into the air inlet. By regulating the fuel pressure also in dependence of the measured vacuum signal, the emission of unburned fuel is reduced under certain dynamic conditions of the combustion engine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.