DIRECT INJECTION TYPE INTERNAL COMBUSTION ENGINE - MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA

Title:

DIRECT INJECTION TYPE INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JP3644329

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To establish enhancement of the fuel economy and the enhancement of the output compatibly by of a direct injection type internal combustion engine by setting the shape of the combustion chamber and the relative positional relationship of constituent parts of the combustion chamber so that the combustion efficiency becomes the highest.
SOLUTION: An direct injection type internal combustion engine to inject the fuel directly into a combustion chamber 3 is structured so that the undersurface of a cylinder head 8 is made in a pentroof shape, the top face of each piston 2 is made in a crest shape alongside the pentroof shape, and that a recess 25 is formed at least in the inclined oversurface on the intake valve side of the top face of the piston 2, wherein the ratio of Va and Vb to the total capacity of the combustion chamber 3 Va+Vb+Vb when the piston 2 lies at the upper dead point should be between 0.4 and 0.6, where Va represents the capacity portion inside the recess 25 and Vb represents the capacity portion between the cylinder head 8 undersurface and the piston 2 oversurface located over the recess 25 among the capacity of the combustion chamber 3 when the piston 2 lies at the upper dead point.

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Inventors:

Hiromitsu Ando
Satoshi Yoshikawa
Kenji Goto
Takashi Kawabe
Katsunori Ueda
Nobuaki Murakami
Hideyuki Oda
Kyoya Igarashi

Application Number:

JP30289799A

Publication Date:

April 27, 2005

Filing Date:

September 11, 1995

Export Citation:

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Assignee:

MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA

International Classes:

F02B23/10; F02B17/00; F02F3/26; F02B75/12; (IPC1-7): F02B23/10; F02B17/00; F02F3/26

Domestic Patent References:

JP63189614A
JP4166612A
JP4353236A
JP4224230A
JP5099032A
JP62082221A
JP62051754A
JP10288039A
JP10311221A

Attorney, Agent or Firm:

Yu Sanada

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