Internal combustion engine

• Main Authors: Moteki, Katsuya, Aoyama, Shunichi, Takemura, Shinichi, Ushijima, Kenshi, Mizuno, Hideaki
• Format: Patent
• Language: English; French; German
• Published: 22.11.2017
• Subjects: ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES; BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES ORMATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHERTHAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES; INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUSSUBCLASSES OF CLASSES F01-F04; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; WEAPONS

In a reciprocating piston engine employing a variable compression ratio mechanism (20) configured to be linked to a reciprocating piston (9) for variably adjusting a geometrical compression ratio by varying at least a top dead center position of the piston (9) responsively to a controlled variable, a controller (39) is configured to control the variable compression ratio mechanism (20) depending on an engine operating condition. A part of a wall surface of a combustion chamber (62) is formed of a non-metallic material (55,56;55,71a) having a higher heat-insulating and heat-reserving property as compared to a base structural material of each of the combustion chamber (62) and the piston (9).