Two-stroke engine and method for operating a two-stroke engine

A two-stroke engine comprising:

• a cylinder having a combustion chamber formed therein;
• a piston configured to be guided in a reciprocating manner in said cylinder;
• said combustion chamber being delimited by said piston;
• a crankcase defining a crankcase interior;
• a crankshaft rotatably mounted in said crankcase;
• said piston being configured to drive said crankshaft;
• a first intake channel which opens into said crankcase interior via a first intake channel opening;
• said first intake channel and said crankcase interior forming a first flow path;
• a throttle element disposed in said first intake channel;
• said combustion chamber having an outlet opening;
• said cylinder having a cylinder bore;
• at least one transfer channel opening out via a transfer window at said cylinder bore and opening into said crankcase interior via a passage opening;
• said at least one transfer channel being configured to establish a fluidic connection between said crankcase interior and said combustion chamber in a region of bottom dead center of said piston;
• a second intake channel for supplying scavenging air to said at least one transfer channel;
• wherein a connection between said second intake channel and said at least one transfer channel and a connection between said first intake channel opening and said crankcase interior as a function of a rotary position of said crankshaft are controlled in such a manner that said connection between said second intake channel and said at least one transfer channel during an upward stroke of said piston is established before said connection between said first intake channel opening and said crankcase interior;
• and,
• a metering device for supplying fuel, said metering device being configured to supply to said first flow path an entire quantity of fuel to be supplied to the two-stroke engine downstream of said throttle element.

A two-stroke engine comprising:

• a cylinder having a combustion chamber formed therein;
• a piston configured to be guided in a reciprocating manner in said cylinder;
• said combustion chamber being delimited by said piston;
• a crankcase defining a crankcase interior;
• a crankshaft rotatably mounted in said crankcase;
• said piston being configured to drive said crankshaft;
• a first intake channel which opens into said crankcase interior via a first intake channel opening;
• said first intake channel and said crankcase interior forming a first flow path;
• a first throttle element arranged in said first intake channel;
• said combustion chamber having an outlet opening;
• said cylinder having a cylinder bore;
• at least one transfer channel opening via a transfer window at said cylinder bore and opening into the crankcase interior via a passage opening;
• said at least one transfer channel being configured to establish a fluidic connection between said crankcase interior and said combustion chamber in a region of bottom dead center of said piston;
• a second intake channel configured to supply scavenging air to said at least one transfer channel;
• a second throttle element arranged in said at least one second intake channel;
• said first intake channel and said second intake channel being formed separate from each other;
• wherein a connection between said second intake channel and said at least one transfer channel and a connection between said first intake channel opening and said crankcase interior are controlled as a function of a rotary position of said crankshaft;
• and,
• an injection valve for supplying fuel, said injection valve being configured to supply an entire quantity of fuel to be supplied to the two-stroke engine to said first flow path.