Sub-combustion chamber of an internal combustion engine
In a cylinder head in an internal combustion engine having a cylinder body to which the cylinder head is installed, with a gasket placed therebetween, the cylinder head is described including a pre-combustion chamber having a cylindrical portion for receiving a ceramic hot plug; and a ceramic hot plug disposed in the cylindrical portion of the pre-combustion chamber. The improvement comprises: an annular shoulder in the pre-combustion chamber, an annular elastic member disposed between the annular shoulder and the upper end of the ceramic hot plug and compressed therebetween; the ceramic hot plug being shaped to conform to the cylindrical portion of the pre-combustion chamber so that a small clearance is provided between the ceramic hot plug and the peripheral wall of the pre-combustion chamber; and means for preventing the ceramic hot plug from dropping out of the cylindrical portion of the pre-combustion chamber prior to installation of the cylinder head on the cylinder body.
- Assignee:
- Kyocera Corp., Kyoto
- Patent Number(s):
- US 4714062
- OSTI ID:
- 5313148
- Country of Publication:
- United States
- Language:
- English
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