Importance

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Abstract

An engine generator includes a four-cycle engine including a cylinder, one inlet port that supplies air-fuel mixture into the cylinder, one inlet valve that opens/closes the inlet port, a piston reciprocable inside the cylinder, a crank shaft that converts reciprocating movement of the piston into rotating movement, a connecting rod that connects the piston and the crank shaft to each other, and a recoil starter that rotates the crank shaft. The engine has a geometric compression ratio not smaller than about 8.5. The valve closure timing of the inlet valve is defined as a timing when the closing inlet valve has a valve lift of about 1 mm, and is within a range from after the bottom dead center to the top dead center.

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First Claim