CYLINDER BORE WALL HEAT INSULATION DEVICE, INTERNAL COMBUSTION ENGINE AND VEHICLE
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United States of America Patent
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Issued Date -
Feb 2, 2017
app pub date -
Apr 2, 2015
filing date -
Apr 11, 2014
priority date (Note) -
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Abstract
A cylinder bore wall thermal insulator includes a rubber member that comes in contact with half of a cylinder bore-side wall surface of a middle-lower part of a groove-like coolant passage, and has a contact surface having a shape that conforms to the shape of the cylinder bore-side wall surface of the middle-lower part of the groove-like coolant passage, a metal base member on which the rubber member is secured, and an elastic member that is provided to the metal base member, and biases the metal base member so that the metal base member presses the rubber member against the cylinder bore-side wall surface of the middle-lower part of the groove-like coolant passage. An internal combustion engine in which a cylinder bore wall has a uniform temperature can be provided by utilizing the cylinder bore wall thermal insulator.
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