Patent ID: 11952937
Assignee: ANDREAS STIHL AG & CO. KG
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A two-stroke engine comprising:
a cylinder having a cylinder bore;
a combustion chamber formed in said cylinder bore;
a crankcase defining a crankcase interior;
a crankshaft rotatably mounted in said crankcase;
a reciprocating piston configured to drive said crankshaft;
said combustion chamber being bounded by said reciprocating piston;
at least one transfer channel;
said crankcase interior being fluidically connected to said combustion chamber across said at least one transfer channel in at least one position of said reciprocating piston;
said at least one transfer channel emerging with a discharge opening in said crankcase interior and emerging with at least one transfer window on said cylinder bore;
an intake channel;
a fuel supply unit for supplying of fuel to said intake channel or said crankcase interior;
an outlet opening from said combustion chamber;
wherein all of said at least one transfer channels have an average length as measured from said discharge opening to said transfer window;
wherein said average length of said at least one transfer channel is at least 1.5 in relation to a stroke of said piston; and,
said crankcase interior defining a crankcase volume including all of said at least one transfer channels being at most 3.1 in relation to a piston displacement.