Carburetor for an internal combustion engine

US4861522A · kind A · utility

Assignee

• Andreas Stihl · DE

Inventors

• Reinhard Gerhardy · Bad Marienberg, DE
• Hans Holderle · Freiberg, DE
• Jurgen Wolf · Kriftel, DE
• Werner Vonderau · Sechselberg, DE

Key dates

• Filing date: May 2, 1988
• Grant date: Aug 29, 1989
• Expiry date: May 2, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86847
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

Disturbances can occur in handheld portable tools driven by internal combustion engines because the idle-nozzle system and the main-nozzle system influence each other. The carburetor of the invention prevents this disturbing influence and provides a control of the engine which is proportional to speed. The carburetor includes a control member which closes off the main nozzle during idle operation and the idle nozzle during operation under load in dependence upon the position of the throttle flap.