CYLINDER HEAD, INTERNAL COMBUSTION ENGINE EQUIPPED WITH SAME, AND CORE FOR MOLDING INTAKE PORT

Title:

CYLINDER HEAD, INTERNAL COMBUSTION ENGINE EQUIPPED WITH SAME, AND CORE FOR MOLDING INTAKE PORT

Document Type and Number:

WIPO Patent Application WO/2015/182191

Kind Code:

A1

Abstract:

[Problem] To provide a technology for further improving fuel economy. [Solution] The intake port (24) is provided with a square port area, the vertical cross-sectional shape in the lengthwise direction (direction of intake air flow) of which is substantially square, and the opening that leads from an injector attachment aperture (26) into branch ports (24b, 24c) is formed approximately entirely within upper flat wall portions (122b, 122c) in square port areas of the branch ports (24b, 24c). In so doing, the size of dead volume (92) can be minimized, as compared with when the injector attachment aperture is formed in an intake port of circular cross-sectional shape. Consequently, turbulence of intake air flowing within the intake port (24), and particularly within the branch ports (24b, 24c), can be minimized, affording good mixing of fuel and intake air, and improving combustion efficiency. Fuel economy can be further improved as a result.

Inventors:

ABE DAICHI (JP)
SATAKE TAKASHI (JP)
TOKURA KOICHI (JP)
IWAMURO NOBUO (JP)

Application Number:

PCT/JP2015/055349

Publication Date:

December 03, 2015

Filing Date:

February 25, 2015

Export Citation:

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Assignee:

AICHI MACHINE IND (JP)

International Classes:

B22C9/24; F02F1/24; F02F1/42; F02M61/14; F02M69/00

Foreign References:

JP2011149309A	2011-08-04
JP2006299894A	2006-11-02
JPH10299497A	1998-11-10
JPH06213069A	1994-08-02
JPS61255745A	1986-11-13

Other References: