Abrégé

A piston arrangement (12) for an internal combustion engine (10) comprises one or more pistons (14) which are at least partly constructed from a technical ceramic material. An axially disposed bore (20) for receiving a heat transfer member (22) is provided in at least one of the pistons (14). The heat transfer member (22) is reconfigurable from a first, solid, state to a second state in which at least part of the heat transfer member (22) is in a liquid state so as to transfer heat away from and thus cool the piston rod (16) as the piston reciprocates. A cylinder arrangement (46) for the internal combustion engine (10) comprises one or more cylinders (48) which are at least partly constructed from a technical ceramic material. One or more grooves (54) are formed in the cylinder (48), to decrease the thermal gradient between the inside and outside of the cylinder (48). A piston (14) for the internal combustion engine (10) comprises a piston rod (16) and a piston crown (18) which is at least partly constructed from a technical ceramic material. An insulation arrangement (40) between the piston rod (16) and the piston crown (18) comprises segments (42) configured such that when disposed on the piston rod (16) axial slots or spaces are defined between the segments (42).

Classes IPC  ?

• F02B 75/28 - Moteurs à plusieurs pistons alternatifs se déplaçant dans le même cylindre ou dans des cylindres sensiblement coaxiaux
• F02F 3/00 - Pistons
• F02F 3/18 - Pistons comportant des moyens de refroidissement les moyens consistant en un agent de refroidissement liquide ou solide, p. ex. du sodium, dans une chambre close ménagée dans le piston
• F02F 1/18 - Autres cylindres