Apparatus and method for adjusting air-to-fuel ratio for small gasoline engine

US7509941B2 · kind B2 · utility

Assignee

• Phelon Euro AB · SE

Inventors

• Lars-Olof Ottosson
• Jorgen Bengtsson · Eksjö, SE
• Bert Gustafsson · Åmål, SE

Key dates

• Filing date: Mar 6, 2007
• Grant date: Mar 31, 2009
• Expiry date: Mar 6, 2027

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02P3/0861
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An apparatus and method for use with a carbureted internal combustion engine that accurately controls the amount of fuel that passes through the carburetor into the combustion chamber of the engine. A controlled triggering system controls the activation and deactivation of a solenoid. The solenoid, in turn, operates a plunger that varies the flow of fuel during the fuel intake cycle of the engine depending on the amount of fuel needed by the engine under any operating load. Thus, an engine can run leaner under partial load and run richer during periods of load and acceleration. By controlling the air-to-fuel ratio lower engine emissions and fuel consumption can be achieved.