On the Temperature of Piston and Cylinder Liner in a Kerosene Engine

概要

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In this paper the authors have described the results of measuring the temperature distribution over the usual piston, special piston, and cylinder liner by means of the thermocouples, and the results of calculating the heat transmitted from the piston to the cylinder liner. The special piston has four or six longitudinal fins which are installed inside with intension to decrease the temperature of both the piston head and the first ring groove. From the experimental results, the following conclusions were reached. (a) The temperature of usual piston without fins is so high that the first ring of piston is in danger of sticking. On the contrary the longitudinal fins of inside surface prove effective as intended by the authors. (b) The exhaust gas leakage disturbs the concentric uniformity of the temperature of the piston body. (c) The heat is transferred to the air in the crank case from the inner surface of the tail part of liner. (d) The overall coefficient of heat transmission from the piston body to the liner through the piston rings is calculated to be 7000 to 8000 kcal/m^2hr℃.
一般社団法人日本機械学会の論文