Cylinder bore wall thermal insulator, internal combustion engine, and automobile
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 2, 2020
Grant Date -
Jan 31, 2019
app pub date -
Aug 29, 2017
filing date -
Nov 21, 2016
priority date (Note) -
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Abstract
A cylinder bore wall thermal insulator includes a base member made of synthetic resin and having a shape conforming to a shape of the groove-like cooling water channel in a setting position of the thermal insulator, an opening for heat-sensitive expanding rubber swelling for heat-sensitive expanding rubber disposed on a rear surface side to pass through a base member during heat-sensitive expansion being formed in a position opposed to an insulating part of a cylinder bore wall, heat-sensitive expanding rubber disposed on the rear surface side of the base member and covering the opening for heat-sensitive expanding rubber swelling, and a rear-surface metal plate covering the rear surface side of the heat-sensitive expanding rubber, fixed to the base member, and holding an outer edge portion of the heat-sensitive expanding rubber between the rear-surface metal plate and the base member to thereby fix the heat-sensitive expanding rubber to the base member. An urging member for urging the heat-sensitive expanding rubber after the heat-sensitive expansion toward the cylinder bore wall is attached to the rear-surface metal plate.
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