Patent ID: 6668771
Filing Date: 2003-12-30
Classification: F02B

Abstract:
A two-stroke, crankcase-scavenged internal combustion engine (1) including:a cylinder (2); an inlet tube (10) operatively connected to the cylinder (2) for introducing air/fuel mixture to the cylinder (2); a transfer duct (20) extending from the cylinder (2) to a crankcase (3) area of the engine (1), the crankcase (3) being located toward a lower portion of the engine (1); a carburetor (12) connected to the inlet tube (10); and an air inlet (24) equipped with a restriction valve (25); a piston-ported air passage (23, 22, 26, 21) arranged between the air inlet (24) and the transfer duct (20) at the cylinder (2): wherein the inlet tube (10), the carburetor (12), the air inlet (24), and the air passage (23, 22, 26, 21) are configured with respect to the engine (1) such that the air inlet (24) at least partly extends below the carburetor (12).