Heat insulating combustion chamber and method of producing the s

Details Heat insulating combustion chamber and method of producing the s Heat insulating combustion chamber and method of producing the s

1988-10-14

1990-03-20

Cross, E. Rollins

Internal-combustion engines

Combustion chamber

Having coating or liner

123193CH, F02B 7508

Patent

active

049092308

ABSTRACT:
The heat insulating combustion chamber according to the present invention is provided with a surface layer, which faces a combustion chamber, of a head liner consisting of an integrated structure of a lower surface portion of a head and an upper portion of a cylinder liner and made of a thin ceramic layer of the smallest possible thickness, and a heat insulating member, i.e. a heat insulating layer consisting of a porous carbon structure and disposed between the head liner and this thin layer so as to improve the heat insulating functions of the combustion chamber, the thin layer which faces the combustion chamber, and which is heated to a high temperature, being formed to have a small thermal capacity, whereby the suction efficiency in a suction stroke of the engine and the cycle efficiency are improved, the thin layer the strength of which decreases due to the reduction of the thickness of the ceramic material constituting the same being reinforced by a latticed partition inserted in the heat insulating layer so as to support the thin layer, the joint portions of the thin layer and partition being combined firmly with each other. The present invention further provides a method of producing a heat insulating combustion chamber of the above described construction very easily to have a high strength.

REFERENCES:
patent: 3820523 (1974-06-01), Showalter et al.
patent: 4376374 (1983-03-01), Bothwell
patent: 4523554 (1985-06-01), Ryu
patent: 4531502 (1985-07-01), Mizuhara
patent: 4676064 (1987-06-01), Naita et al.
patent: 4838235 (1989-06-01), Kawamura et al.
"Ceramic Coating Techniques" published on May 25, 1984 (date of issue) by the Sogo Gijutsu Center K.K. (publishing company), pp. 41-52.

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