Reciprocating piston engine

US6109251A · kind A · utility

Assignee

• Andreas Stihl AG & Co. KG · DE

Inventors

• Jurgen Haberlein · Murrhardt, DE
• Georg Becker · Schwaikheim, DE

Key dates

• Filing date: Jul 21, 1999
• Grant date: Aug 29, 2000
• Expiry date: Jul 21, 2019

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01M2013/0422
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a reciprocating piston engine having a piston which moves upwardly and downwardly and which rotatably drives a crankshaft and components connected therewith via a connecting rod. The crankshaft is journalled in the crankcase which has a crankcase venting system to compensate pressure in the interior space of the crankcase. The venting system includes a venting line leading away from the interior space of the crankcase. The venting line is configured as a channel in a rotating component in order to achieve a functionally reliable pressure compensation with high separating action. The channel defines a connection between the interior space of the crankcase and the atmosphere. A valve is mounted in this channel and this valve becomes unblocked under the action of centrifugal force and seals the crankcase with respect to fluids when the engine is at standstill.