Piston type internal combustion engine
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United States of America Patent
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Feb 9, 2016
Grant Date -
Aug 27, 2015
app pub date -
Dec 1, 2014
filing date -
Feb 21, 2014
priority date (Note) -
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Abstract
An internal combustion engine includes a cylinder of which the interior is divided into two in the longitudinal direction. The lower chamber serves as a mechanical driving portion in which the piston is reciprocated. The upper chamber serves as a power portion in which combustion gas is drawn in, compressed, burned and exhausted. A cylindrical portion with a lid which moves into the power portion is continuously provided on top of the piston. A gap is defined between the cylindrical portion and the inner peripheral surface of the power portion of the cylinder. The inner peripheral surface of the power portion is defined by a heat shield tube fitted in the cylinder. A heat insulating tube is provided on the outer periphery of the heat shield tube.
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