TWO CYCLE INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To prevent contamination and fire accidents by communicating a fuel well and the upper stream parts of lead valves of air intake paths by fuel supply pipe, and ensuring the sucking of blown back fuel to the side of a carbureter by the action of the negative pressure in crank chambers. CONSTITUTION:When a piston 19 is in an ascending stroke and the reed valves 32A and 32B are opened, the negative pressure in the crank chambers 21A and 21B are acted on the fuel chamber 39 through the fuel pipe 41. The blown back fuel which is captured in the fuel well 39 can be sucked into air intake paths 31A and 31B through the fuel supply pipe 41. The blown back fuel which is returned to the air intake paths 31A and 31B is mixed in fuel air mixture yielded in the carbureter 14, sucked in the crank chambers 21A and 21B, and introduced into a combustion chamber in the scavenging stroke in which the piston is lowered.