Patent ID: 6112708
Filing Date: 2000-09-05
Classification: F02B

Abstract:
A stratified scavenging two-cycle engine comprising:a piston;a cylinder block, containing a cylinder chamber in which said piston is disposed so as to be slidable;a crankcase, connected to said cylinder block and containing a crankcase chamber;a scavenging flow passage, having a scavenging port formed in a side wall of said cylinder block, for connecting said scavenging port and said crankcase chamber;a check valve;an air supply flow passage fluidly connected to said scavenging flow passage for supplying air through said check valve;a suction fitting;a carburetor for supplying mixture into said crankcase chamber via said suction fitting; andan air cleaner connected to said carburetor;wherein said carburetor is connected between said air cleaner and said suction fitting;wherein an air flow passage, forming a part of said air supply flow passage, and a mixture flow passage are formed in said carburetor at least generally in parallel with each other;wherein an air flow control valve is disposed in said air flow passage in said carburetor;wherein a mixture control valve is disposed in said mixture flow passage in said carburetor;wherein said suction fitting is connected between said carburetor and an outer face of said cylinder block;wherein an air flow passage, formed in said suction fitting, is fluidly connected to said air flow passage in said carburetor; andwherein a mixture flow passage, formed in said suction fitting, is fluidly connected to said mixture flow passage in said carburetor.