シリンダヘッド

Japanese Patent JP7306832

B2

To realize a structure of a cylinder head, mounted on a PFI type internal combustion engine, which fulfills an excellent tumble flow generation function and can curb a port wet phenomenon.SOLUTION: An intake port 7 is linearly arranged with an injector 10 positioned below the intake port 7. A concave section 22 is formed on a lower face of the intake port 7 with a tip of the injector 10 exposed thereon. An inclined bottom section 27 which is downwardly inclined with respect to a reference bottom line (virtual bottom line) 26 of the intake port 7 is formed at a section upstream the concave section 22 on the lower face of the intake port 7. Because the injector 10 is arranged below the lower face of the intake port 7, the intake port 7 can be arranged as close to a vertical position as possible while preventing interference with a valve member and thereby fulfilling an excellent tumble flow generation function. The inclined bottom section 27 can prevent an eccentric flow of an intake air and thereby significantly curbing adherence of fuel to the intake port 7.SELECTED DRAWING: Figure 3

Shigenori Kuroki
Hiroyuki Fujikawa

JP2019013650A

July 11, 2023

January 29, 2019

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Daihatsu Motor Co., Ltd.

F02M69/00; F02F1/24

JP9170526A
JP2012188937A
JP7180559A
JP6108863A
JP2010249124A
JP2000204969A
JP11107764A
JP2003262132A
JP2008208819A
JP2013209964A
JP6101485A
JP2008291783A
JP200657503A
JP6159201A

US6308686
WO2013146703A1

Hiroyuki Nishi
Ryuichi Watanabe

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