Stock material or miscellaneous articles – Hollow or container type article – Glass – ceramic – or sintered – fused – fired – or calcined metal...
Patent
1995-05-26
1996-09-03
McCamish, Marion E.
Stock material or miscellaneous articles
Hollow or container type article
Glass, ceramic, or sintered, fused, fired, or calcined metal...
29888061, 60323, 138146, 138149, 164 98, 428 347, 428 362, 428 3691, B32B 108, F01N 710
Patent
active
055521967
ABSTRACT:
The design and construction of past port liners with heat insulation capabilities have had to become more simple in order to reduce costs. However, less costly exhaust port liners may have inferior heat insulation capabilities. Additionally, port liners cast into a cylinder head of an internal combustion diesel engine must endure the stresses associated with the high casting temperatures of cast iron. The present invention overcomes these and other problems by utilizing a ceramic port liner containing a low temperature softening phase. The ceramic port liner is surrounded by a blanket formed when a fiberglass cloth encapsulates an insulating layer of material. The ceramic port liner and surrounding blanket are cast within a cylinder head. During the casting process, the ceramic port liner remains in a softened state. As the casting cools, the ceramic port liner returns to a regular solid state at a progressively sufficient thermal rate to protect it from damage. The ability to protect the ceramic port liner during casting enables it to be used in conjunction with the surrounding blanket, decreasing the rate of heat loss. The ability to decrease the rate of heat loss increases engine efficiency.
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Haselkorn Michael H.
Long Michael C.
Caterpillar Inc.
Charlton Diana L.
Copenheaver Blaine R.
McCamish Marion E.
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