Studies on the Distribution of Cylinder Temperature of Knapsack Type Mist-duster Engine

Abstract

The influences of various cooling conditions on the distribution of cylinder temperature of Knapsack type mist-duster engine were investigated, and the following results were obtained.
(1) Cylinder temperature rises with the increases of r. p. m. and load, and is low on the sides of inlet of cooling air [0°] and suction [270°], and is high on the sides of exhaust [90°] and derivery of cooling air [180°].
It must be cautioned that the cylinder temperature on the exhaust side rises higher than 190°C at the 40 percent partial load.
(2) Cylinder temperature at the lower partial load is much influenced by the fuel consumption regardless of the ratio of oil to gasoline mixture.
(3) The slackness of fin cover by 10mm results in the higher cylinder temperature by 6°C than ordinary set, especially remarkable on the side of the exhaust.
(4) Temperature rises by 27°C at thee cylinder head and decreases by 5°C at the cylinder wall due to the cylinder head fitted faultily, crosswise the direction of inlet cooling air.
(5) Temperature rises by 6-7°C at the cylinder wall and by 14°C at the cylinder head due to the adhesion of dust particles, 40 to 60 gr. of Bentonite, and extremely reaches 200°C by using 100 gr. of Ceressan-Lime mixture at the 40 percent partial load.
(6) Cylinder temperature rises remarkably due to the blockage of the path of cooling air on [270°C] side, while its rising is seen only at the outlet of cooling air due to the blockage of the path of [90°] side.