Internal-combustion engines – Particular piston and enclosing cylinder construction – Piston
Reexamination Certificate
2004-02-06
2008-10-21
McMahon, Marguerite (Department: 3747)
Internal-combustion engines
Particular piston and enclosing cylinder construction
Piston
Reexamination Certificate
active
07438039
ABSTRACT:
A large-bore (at least 180 mm diameter) diesel engine cylinder configuration featuring a piston crown bowl having an acute re-entrant angle and, optionally, an anti-polish ring. The acute re-entrant angle crown bowl involves a maximum radius of the crown bowl exceeding a minimum crown bowl radius, wherein the maximum crown bowl radius is located farther from the squish face than is the minimum crown bowl radius. The acute re-entrant angle crown bowl applied to large-bore, medium-speed diesel engines yields an improvement in performance and emissions characteristics. The anti-polish ring may be integrally formed with the cylinder liner and used in any internal combustion engine.
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Acosta German A.
Beasley John L.
Blase James L.
Goetzke Michael
Gryfakis Nicholas
Cummings, P.C. Eugene M.
Electro-Motive Diesel Inc.
McMahon Marguerite
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