Engine combustion chamber structure - Mazda Corporation Inc

Title:

Engine combustion chamber structure

Document Type and Number:

Japanese Patent JP6047996

Kind Code:

B2

Abstract:

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.

Inventors:

Tadachi Toda
Mitsunori Hayada
Tadashi Hashiguchi
Takashi Goster
Kazuhiro Nagatsu

Application Number:

JP2012185270A

Publication Date:

December 21, 2016

Filing Date:

August 24, 2012

Export Citation:

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