| 摘要 |
PROBLEM TO BE SOLVED: To purify exhaust gas by realizing scavenging by air, preventing blow-by of mixture in a scavenging stroke, and preventing burning of lubricating oil in a combustion chamber. SOLUTION: A two-cycle internal combustion engine 1 is provided with a compressor for performing a compression stroke according to a scavenging stroke by being interlocked with a piston 7 to be reciprocating in a cylinder, mixture from a carburetor is pressurized by the compressor and supplied to a cylinder combustion chamber, and air is pressurized by the compressor and supplied from a cylinder side part to perform scavenging. An oil pump 60 to be driven by a crankshaft 3 is provided, the bottom part of a crank chamber is taken as a lubricating oil reservoir, and the crankshaft 3 is lubricated with lubricating oil from the oil pump 60.
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