Two-cycle engine with pneumatic fuel injection and flow restriction in at least one transfer passageway

Two-cycle engine comprising at least one cylinder, a piston movably mounted in said cylinder, a crankcase communicating with one end of the cylinder and comprising a means for admitting air into the crankcase, at least one intake passageway for introducing non-carburetted air into the cylinder, said at least one intake passageway communicating the crankcase with a transfer opening in the cylinder, means for pneumatically injecting fuel into the cylinder including a pneumatic injector, supply and metering means for supplying and metering the pneumatic fuel injector, a passageway for supplying the pneumatic injector with compressed air to atomize the fuel, said passageway being connected to the crankcase by a valve and a container for accommodating compressed air connected to the pneumatic injector by said passageway, an exhaust passageway connected to the cylinder by an exhaust opening located in an offset position in a direction of travel of the piston relative to the transfer opening of the cylinder, means for restricting a flow in the at least one intake passageway, and means for regulating an opening and closing of said means for restricting as a function of at least one engine operating parameter.