Investment-cast piston crown cap with encapsulated non-metallic insulating core
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United States of America Patent
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Jul 10, 1990
Grant Date -
N/A
app pub date -
Jun 1, 1988
filing date -
Jun 18, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Pistons for internal combustion engines, particularly compression ignition engines. The pistons have insulating crowns and include a crown having a cap thereon, extending over the crown surface area, the crown cap being composed of an iron-based or a nickel-based alloy and having on the underside thereof ribs which are encast into an aluminium alloy which forms the piston body. The crown cap further includes a ceramic insert encapsulated therein. The ceramic insert may also be leached out by chemical means to leave a void in the cap.
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