Pre-chamber type internal combustion engine
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United States of America Patent
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May 18, 2021
Grant Date -
May 28, 2020
app pub date -
Sep 23, 2019
filing date -
Nov 22, 2018
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Abstract
A cylinder head is formed with a pre-chamber surrounded by a thin pre-chamber wall sticking out from the inside wall surface of the cylinder head to the inside of the main combustion chamber. Inside of the pre-chamber, the electrode of a spark plug is arranged. When the spark plug is used to burn the air-fuel mixture in the pre-chamber, jet flames are ejected from the communication holes to the main combustion chamber. The thin pre-chamber wall is formed from a metal material while the overall outer circumferential surface around the communication holes passing through the thin pre-chamber wall is formed by a material with a lower heat conductivity than the thin pre-chamber wall.
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