Heat-insulating structure of swirl chamber and production method

Details Heat-insulating structure of swirl chamber and production method Heat-insulating structure of swirl chamber and production method

1990-07-27

1991-04-30

Wolfe, Willis R.

Internal-combustion engines

Precombustion and main combustion chambers in series

Precombustion chamber liner or coating

123254, 29888061, F02B 1908, F02B 1916

Patent

active

050108611

ABSTRACT:
In a heat-insulating structure of a swirl chamber in accordance with the present invention, a cast metal blocks made of a metal material casted into the gap portions in molded articles made of a ceramic fiber-reinforced material are disposed outside swirl chamber blocks made of a ceramic material and forming swirl chambers, and the cast metal blocks are fitted and fixed to a fitting holes of a cylinder head in such a manner as to define air layers. The coefficient of thermal expansion and heat transfer rate of the cast metal blocks can be controlled and heat-resistance can be improved by adding the ceramic fiber-reinforced material to the cast metal blocks. Furthermore, the present invention relates to a production method of a heat-insulating structure of a swirl chamber which imparts easily a residual compressive stress to the swirl chamber blocks using the cast metal blocks.

REFERENCES:
patent: 4616611 (1986-10-01), Ogawa et al.
patent: 4676207 (1987-06-01), Kawamura et al.
patent: 4681074 (1987-07-01), Ogawa et al.
patent: 4699102 (1987-10-01), Taniguchi
patent: 4834042 (1989-05-01), Wakasa et al.
patent: 4844037 (1989-07-01), Miyakawa et al.
patent: 4875939 (1989-10-01), Miyakawa et al.

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