Patent ID: 6739292
Filing Date: 2004-05-25
Classification: F01L,F02B

Abstract:
A two-stroke internal combustion engine comprising:(a) a cylinder having a cylindrical inner wall, an upper end, and a longitudinal axis; (b) a piston in the cylinder; (c) a cylinder head mounted atop the upper end of the cylinder and comprising: (i) a lower surface; (ii) at least one air supply channel in the head; (iii) at least one air intake opening and one air intake valve selectively closing the opening and configured to control the supply of intake air to the cylinder, the at least one intake opening and valve being positioned in the cylinder head along the at least one air supply channel in the cylinder head; (d) an air compressor connected to the air supply channel for supplying compressed air to the cylinder through the at least one air intake valve; and (e) a substantially circular trough in the lower surface of the cylinder head, the trough being substantially concentric with the longitudinal axis of the cylinder; (e) wherein the at least one air intake valve is configured to open and permit the compressed air to enter the cylinder during a scavenging portion of an engine operational cycle and to close during a compression portion of the engine operational cycle, the air intake opening includes an axis which is inclined at an angle relative to the longitudinal axis of the cylinder such that the compressed air entering the cylinder is directed at least partially tangentially to the cylinder inner wall, and the trough is configured to cooperate with the at least one valve and the inner wall of the cylinder to direct the air introduced into the cylinder to swirl in a substantially circular flowpath proximate to the lower surface of the cylinder head.