Whirlpool type - Whirlpool chamber type

Japanese: 渦流室式 - かりゅうしつしき
Whirlpool type - Whirlpool chamber type

…However, in high-speed engines, this alone is insufficient, so the intake air is given a swirling flow around the central axis of the cylinder, and radial flow caused by the up and down movement of the piston is actively utilized. The pre-chamber types currently in practical use are the swirl chamber type and the pre-combustion chamber type. The former creates a strong vortex in the swirl chamber at the top of the cylinder during the compression stroke of the piston, and the fuel is injected into this vortex to achieve as efficient combustion as possible within the swirl chamber. …

*Some of the terminology used to refer to the "swirl chamber type" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…しかし,高速機関ではこれだけでは不足であり,吸入空気にシリンダー中心軸回りの旋回流を与えたり,ピストンの上下運動に伴って生ずる半径流などを積極的に利用する。副室式としては渦流室式と予燃焼室式が現在実用されている。前者はシリンダーの上部の渦流室中にピストンの圧縮行程で強力な渦を作り,この中に燃料を噴射し,渦流室内でできるだけ十分な燃焼を図るものである。…

※「渦流室式」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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