Polymetallic piston-cylinder configuration for internal...

F - Mech Eng,Light,Heat,Weapons – 02 – F

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F02F 1/00 (2006.01) F02B 77/02 (2006.01) F02F 3/00 (2006.01) F02F 3/12 (2006.01)

Patent

CA 2028713

A piston-cylinder combination for internal combustion engines made from a varying bonded combination of two or more alloys having dissimilar coefficients of thermal expansion. By regulating the volumetric percentages of the alloys vis-a-vis their location within the piston and cylinder wall, the degree of thermal expansion experienced during operation may be controlled. The concept is especially useful for low heat rejection engines.

Combinaison de piston-cylindre pour moteur à combustion interne obtenue d'une combinaison variée de deux ou de plusieurs alliages, liés entre eux et présentant des coefficients différents d'expansion thermique. En régularisant les pourcentages volumétriques des alliages en regard de leur position à l'intérieur du piston et de la paroi du cylindre, on peut contrôler le degré d'expansion thermique au cours du fonctionnement. Le concept est surtout utile pour les moteurs rejetant peu de chaleur.

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