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Dive into the research topics where Kohei Iwai is active.

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Featured researches published by Kohei Iwai.


Jsae Review | 2002

Effect of combustion chamber shape on tumble flow, squish-generated flow and burn rate

Masahiko Fujimoto; Kohei Iwai; Motoshi Kataoka; Michihiko Tabata

Abstract Effects of squish area location on tumble and squish flow were investigated to control the knock in an SI engine. For the exhaust squish piston, tumble flow is collapsed by the exhaust squish clearance during the compression stroke, so that the compression-squish flow is strong. For the intake squish piston, tumble flow impinges on the edge of squish area and the induction of it into the squish area is controlled. The compression-squish flow is weakened and reverse-squish flow grows strong. This led to realization of a high heat release at late stage combustion. Simultaneously, the decrease of cycle-by-cycle variation of initial burn is realized. Consequently, knocking is controlled compared with a flat piston.


Archive | 2012

Control device for spark ignition type gasoline engine

Shuji Oba; Kohei Iwai; Kazuhiro Nagatsu; Masanao Yamakawa; Yoshinao Noo; Shigeru Nakagawa; Masato Iwaki; Kaei Nakayama; Toru Sotozono; Shuhei Shintani; 佳映 中山; 滋 中川; 芳尚 乃生; 徹 外薗; 秀児 大場; 正尚 山川; 浩平 岩井; 正人 岩城; 修平 新谷; 和弘 長津


Archive | 2005

CONTROL DEVICE FOR SPARK IGNITION GASOLINE ENGINE

Kohei Iwai; Masanao Yamakawa; Kaneyuki Ota; Kazuhiro Nagatsu; Takashi Youso; Kazutoyo Watanabe; Hiroyuki Kurita; Naoya Watanabe; Takaaki Nagano; Shuji Oba; 秀児 大場; 統之 太田; 正尚 山川; 浩平 岩井; 寛之 栗田; 一豊 渡邉; 直哉 渡邊; 和弘 長津; 高皓 長野; 隆 養祖


Archive | 2011

Spark ignition engine control device

Kazuhiro Nagatsu; 和弘 長津; Masanao Yamakawa; 正尚 山川; Kaneyuki Ota; 統之 太田; Kohei Iwai; 浩平 岩井; Yoshinao Noo; 芳尚 乃生; Takashi Kaminaga; 隆史 神長; Takeshi Cho


Archive | 2003

INTAKE DEVICE OF SPARK IGNITION TYPE RECIPROCAL ENGINE

Masahiko Fujimoto; Kohei Iwai; Takayuki Kuwabara; Yasushi Murakami; Hirobumi Nishimura; Yoshihisa Nooi; Daisuke Shimo; Michihiko Tabata; Tatsuya Tanaka; Naoyuki Yamagata; 芳尚 乃生; 直之 山形; 浩平 岩井; 大輔 志茂; 康 村上; 孝之 桑原; 達也 田中; 道彦 田端; 昌彦 藤本; 博文 西村


Archive | 2003

INTAKE DEVICE OF SPARK IGNITION TYPE ENGINE

Masahiko Fujimoto; Kohei Iwai; Takayuki Kuwabara; Yasushi Murakami; Hirobumi Nishimura; Yoshihisa Nooi; Naoyuki Yamagata; Yasuhide Yano; 芳尚 乃生; 直之 山形; 浩平 岩井; 康 村上; 孝之 桑原; 康英 矢野; 昌彦 藤本; 博文 西村


Archive | 2011

Control method and control apparatus of a supercharged engine

Masataka Yamakawa; Kohei Iwai; Shuji Oba


Archive | 2011

ABNORMALITY DETERMINING METHOD OF HIGH PRESSURE FUEL PUMP FOR SPARK IGNITION TYPE ENGINE AND CONTROL DEVICE OF SPARK IGNITION TYPE ENGINE

Kazuhiro Nagatsu; Masanao Yamakawa; Yoshinao Noo; Kaneyuki Ota; Kohei Iwai; Masato Iwaki; Naoya Watanabe; Hiroyuki Kurita; Kazutoyo Watanabe; Hiroaki Abe; 芳尚 乃生; 統之 太田; 正尚 山川; 浩平 岩井; 正人 岩城; 寛之 栗田; 一豊 渡邉; 直哉 渡邊; 和弘 長津; 博聴 阿部


Archive | 2009

METHOD AND DEVICE FOR CONTROLLING SPARK IGNITION ENGINE

Kohei Iwai; Shuji Oba; Masanao Yamakawa; Takashi Youso; 秀児 大場; 正尚 山川; 浩平 岩井; 隆 養祖


Archive | 2012

Electric spark ignition type direct-injection engine

Kohei Iwai; 浩平 岩井; Masanao Yamakawa; 正尚 山川; Kazuhiro Nagatsu; 和弘 長津; Takashi Youso; 隆 養祖; Keiji Araki; 啓二 荒木

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