四サイクルディーゼル機関の吸排気弁,ポートの流れに関する実験的研究

概要

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This paper presents the results of steady air flow tests carried out on valves and ports of a diesel engine. One of the objects of the present investigation was to determine the boundary conditions for intake and exhaust valves or ports for use in the computer program of unsteady flow research. The second object was to establish suitable data for the design of valves and ports. The experimental investigation was carried out on a cylinder head with four valves of an actual 4-cycle diesel engine (250 mm bore×320 mm stroke, Semisiamese ports, L_<max>=22 mm). The flow coefficients for the intake and exhaust valves or ports were obtained and plotted against pressure ratios at given lift values. The flow through valves, ports and cylinder were made visible by the aid of an oil film method and the injection of visible tracers. The attempts to improve flow characteristics were conducted by alterations in the exhaust port based on the results of flow visualization.
一般社団法人日本機械学会の論文
1988-04-25