US 7,066,120 B2Granted

Two-cycle engine

AssigneeAndreas Stihl AG & Co. KG

InventorsWerner Geyer, Claus Fleig, Helmar Amend, Klaus-Martin Uhl, Jörg Schlossarczyk

Life of this patent

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Abstract

A two-cycle engine is provided that has a cylinder in which is formed a combustion chamber delimited by a reciprocating piston that via a connecting rod drives a crankshaft rotatably mounted in a crankcase. An inlet is provided for a supply of fuel into the crankcase, and an outlet leads out of the combustion chamber. In predetermined positions of the piston the crankcase communicates with the combustion chamber via at least one transfer channel. The cover is secured to a connecting flange of the cylinder, the cover closes off the transfer channel on an outer side of a cylinder, the connecting flange is inclined relative to the longitudinal axis of the cylinder by an angle that opens in a direction toward the crankcase.

Claims14

Dependent claims

A two-cycle engine, comprising:

a cylinder in which is formed a combustion chamber that is delimited by a reciprocating piston that via a connecting rod drives a crankshaft that is rotatably mounted in a crankcase, wherein an inlet is provided for a supply of fuel into said crankcase, wherein said cylinder has an outlet leading out of said combustion chamber, and wherein in predetermined of said piston said crankcase communicates with said combustion chamber via at least one transfer channel;
and
a cover that is secured to a connecting flange of said cylinder, wherein said cover closes off said at least one transfer channel on an outer side of said cylinder, and wherein said connecting flange is inclined relative to a longitudinal axis of said cylinder by an angle that opens in a direction toward said crankcase, so that said cylinder is adapted to be manufactured by diecasting.

Dependencies are inferred from the claim text.

Facts

Application: 10/799,167Filed 12 Mar 2004
Priority: DE 103 12 09719 Mar 2003
Published: US 2004/0182339 A123 Sep 2004
Granted: 27 Jun 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

F02F 1/22
Other cylinders: characterised by having ports in cylinder wall for scavenging or charging
F02B 63/02
Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices: for…
F02B 75/16
Other engines: engines characterised by number of cylinders, e.g. single-cylinder engines
F02B 2075/025
Having less than six strokes per cycle: two