Patent ID: 6899067
Filing Date: 2005-05-31
Classification: F02B,F02M

Abstract:
1. A two-stroke engine including a two-stroke engine for a portable handheld work apparatus, the two-stroke engine comprising: a crankcase; a cylinder connected to said crankcase; said cylinder having a cylinder wall defining a cylinder bore; a piston displaceably mounted in said cylinder bore and said piston and said cylinder conjointly defining a combustion chamber; a crankshaft rotatably mounted in said crankcase; a connecting rod connecting said piston to said crankshaft so as to permit said piston to drive said crankshaft as said piston reciprocates in said cylinder between bottom dead center and top dead center; said cylinder having a discharge outlet formed therein for conducting exhaust gases away from said combustion chamber; an air channel window formed in said cylinder; an air channel opening into said cylinder at said air channel window and said air channel being provided to supply combustion air; a plurality of transfer channels for connecting said crankcase to said combustion chamber at pregiven positions of said piston and said plurality of transfer channels opening into said cylinder via respective inlet windows in said cylinder; said piston having a piston window formed therein for fluidly connecting said air channel to one of said transfer channels when said piston is in the region of said top dead center; an injection nozzle opening into said one transfer channel; and, said one transfer channel having a connecting window to the interior of said cylinder via which said one transfer channel is connected to said air channel at pregiven positions of said piston.