Engine exhaust valve shield
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United States of America Patent
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Mar 16, 2021
Grant Date -
Dec 15, 2016
app pub date -
Jun 10, 2015
filing date -
Jun 10, 2015
priority date (Note) -
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Abstract
An internal combustion engine has a cylinder head defining an exhaust valve guide bore with a side wall and an end wall, and an exhaust valve stem passage extending between an exhaust port and the end wall of the bore. A diameter of the passage is less than a diameter of the bore. An exhaust gas valve guide is positioned in the bore and spaced apart from the end wall to form an air gap therebetween.
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