Patent ID: 6571756
Filing Date: 2003-06-03
Classification: F02B

Abstract:
A two-cycle engine, comprising:a cylinder in which is formed a combustion chamber; a piston reciprocally disposed in said cylinder and delimiting said combustion chamber, wherein said piston, for driving a crankshaft, is connected by a connecting rod to said crankshaft, which is rotatably mounted in a crankcase; wherein said combustion chamber has an outlet for the removal of waste gases; and wherein said combustion chamber has gas-conveying channels, which open into said combustion chamber, for supplying air for combustion and a fuel/air mixture prepared by a mixture preparation device, wherein for the duration of a scavenging cycle, essentially fuel-free gas flows in the vicinity of said outlet of said combustion chamber, and wherein for the duration of said scavenging cycle, fuel-rich gas flows out of said crankcase in a region of said combustion chamber remote from said outlet thereof, wherein via ones of said gas-conveying channels disposed in the vicinity of said outlet of said combustion chamber essentially only air is supplied, and via ones of said gas-conveying channels disposed remote from said outlet of said combustion chamber essentially only fuel/air mixture is supplied, wherein said air-conveying channel is open towards said crankcase, wherein in the vicinity of that end of said air conveying channel that faces said combustion chamber said air conveying channel communicates via a valve with an air intake member, and wherein said valve is formed by an auxiliary window that is slot-controlled by said piston.