Insulated port linear assembly
US5552196A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1995 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | May 26, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1393
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
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 engin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.