COMBUSTION CHAMBER STRUCTURE OF ENGINE

PROBLEM TO BE SOLVED: To enable sufficient scavenging in a cavity in a central portion on a piston crown surface in an engine in which a compression self-ignition is performed when a geometric compression ratio is 15 or more.SOLUTION: A part of a bevel part 1a of an intake valve 1 is overlapped with...

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Bibliographische Detailangaben
Hauptverfasser:	TODA TADATOMO, HAYATA MITSUNORI, HASHIGUCHI TADASHI, YOUSO TAKASHI, NAGATSU KAZUHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES BLASTING CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION COMBUSTION ENGINES COMBUSTION ENGINES IN GENERAL 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 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
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To enable sufficient scavenging in a cavity in a central portion on a piston crown surface in an engine in which a compression self-ignition is performed when a geometric compression ratio is 15 or more.SOLUTION: A part of a bevel part 1a of an intake valve 1 is overlapped with a cavity 11 formed in a piston 10. A crown surface of the piston 10 has a valve recess 15A (15B, 16A, 16B) for preventing interference of the bevel part 1a with the piston 10 such that the valve recess 15A (15B, 16A, 16B) is continued to the cavity 11. A recess side opening end position 50 that is a position in an area C on an opening end for a combustion chamber of a valve recess 15A for an intake valve 1A and is nearer to another adjacent intake valve 1B, is in the same position as a port side opening end position 51 that is a position on an opening end for the combustion chamber of an intake port 5 and is nearer to the another intake valve 1B, or in a position nearer to the intake valve 1A.