Engine cylinder head with precombustion chambers using porous ce

Details Engine cylinder head with precombustion chambers using porous ce Engine cylinder head with precombustion chambers using porous ce

1988-02-26

1989-10-17

Dolinar, Andrew M.

Internal-combustion engines

Precombustion and main combustion chambers in series

Precombustion chamber liner or coating

123254, 123668, 291564WL, F02B 1916

Patent

active

048739529

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 a 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 5 to 50%. Because of its porousness the cast-inserted ceramics member is easily machine-finished. After that, for enhancement of strength and durability, the cast-inserted member of the porous ceramics is impregnated with an inorganic refractory material by using either a solution of, for example, sodium silicate or aluminum phosphate or an aqueous suspension of a ceramics powder, or a mixture of the solution and the suspension.

REFERENCES:
patent: 3786795 (1974-01-01), Kaneko et al.
patent: 3919755 (1975-11-01), Kaneko et al.
patent: 4325334 (1982-04-01), Nishida et al.
patent: 4562806 (1986-01-01), Gonnord et al.
patent: 4577600 (1986-03-01), Morita et al.

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