著者

田中 敬吉

出版者

一般社団法人 日本機械学会

雑誌

機械學會誌

巻号頁・発行日

vol.31, no.136, pp.810-868, 1928

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The present paper, being the continuation of the auther's earlier reports on the Koku Kenkyusho Zasturoku, consists of two parts. The former is the experiments of the air flow characteristics through an ordinary inlet valve and seat. Generally the air flow through an inlet valve has four different flow configurations I, II, III and IV with the increase of its lift as shown in Fig. 7,and at their tranferences there appear discontinuous points in the lift flow quantity curve, which are called as singular points. The latter is the experiments of variations of the flow configurations and the flow quantities, according to the changes or reformations of the shapes of the inlet valve and seat. There are five changeable points in the shapes as shown in Fig. 3. By these reformations the flow configuration and the flow quantity vary considerably, and often disappear the flow configurations II & III. The most efficient reformation is the rounding of the sharp edges of the valve and seat, and by this reformation Hispano Suiza 300 〓 engine increased 10〜15 〓 at 1800-1900 r.p.m.