Engine cylinder head with precombustion chambers using ceramics

Details Engine cylinder head with precombustion chambers using ceramics Engine cylinder head with precombustion chambers using ceramics

1988-02-17

1990-02-13

Wolfe, Willis R.

Internal-combustion engines

Precombustion and main combustion chambers in series

Precombustion chamber liner or coating

F02B 1914

Patent

active

048997072

ABSTRACT:
The invention relates to a cylinder head for an internal combustion engine in which each combustion chamber has a prechamber. A cast metal body of the cylinder head has recesses each of which provides a prechamber, and a hollow and, for example, bell-shaped member of an adequately porous ceramics is cast-inserted in the inner surface defining each recess. Use is made of a ceramics low in thermal expansion coefficient and heat conductivity, such as aluminum titanate or cordierite, and the porosity of the ceramics is limited within the range of from 5 to 20%. The cast-inserted ceramics member can easily be machine-finished and, without any extra treatment, has sufficient strength and durability.

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patent: 4562806 (1986-01-01), Gonnord et al.
patent: 4577600 (1986-03-01), Morita et al.
patent: 4600038 (1986-07-01), Matsui et al.
patent: 4651692 (1987-03-01), Morita et al.

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