Heat insulating structure for swirl chambers

Details Heat insulating structure for swirl chambers Heat insulating structure for swirl chambers

1995-03-13

1996-05-28

Nelli, Raymond A.

Stone working

Turning

Grinding-wheel dressing

F02F 100

Patent

active

055201482

ABSTRACT:
This heat insulating structure for swirl chambers enables the heat insulating capability of hot plugs, which form swirl chambers, to be improved by setting an area of contact surfaces of the hot plugs and walls surrounding the same to a proper level. A cylinder head is fixed on a cylinder block with a gasket interposed therebetween, and hot plugs constituting swirl chambers are provided in cavities in the cylinder head, whereby heat insulating air layers are formed between the hot plugs and the cavities. The hot plugs are formed out of a heat resisting ceramic material, and the sum of an area of contact portions of the outer surfaces of the hot plugs and the corresponding portions of the cavities and that of contact portions of the outer surfaces of the hot plugs and the corresponding portions of an upper surface of said cylinder block is set to not more than 1/5 of a total area of the outer surfaces of the hot plugs.

REFERENCES:
patent: 5010861 (1991-04-01), Matsuoka
patent: 5014664 (1991-05-01), Matsuoka
patent: 5040504 (1991-08-01), Matsuoka
patent: 5065714 (1991-11-01), Matsuoka
patent: 5178109 (1993-01-01), Kawamura

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