Thermal Effect upon Air Capacity of the Four-Stroke Engine : 2nd Report, Results of Experimental Analysis

Abstract

Report No. 1 has shown a way of determining various temperature changes in the mixture gas in the induction process, and in the suction end temperature. The directly measurable intake mixture gas weight and the cylinder pressures were substituted into the thermodynamical equations obtained by a theoretical analysis of the engine cycle. The relationship between the air capacity and various temperatures of mixture was expressed theoretically. Here the results of experimental measurements are reported. The effect of various temperature rises upon the air capacity was studied while varying the engine type, intake manifold pressure, spark advance, mixture ratio, cooling-water temperature, compression ratio, intake temperature and exhaust pressure.