The Effect of Intake Air Temperature and Pressure for Engine Performance in a Pre-Combustion Type Diesel Engine.

It has widely been pointed out by some well-known scholars that there are close relationships between the engine performance and operating conditions and also there is thermodynamic effect on the engine performance. They established the equations for the volumetric efficincy affected by the atmospheric air temperature and pressure, intake manifold pressure, and the like. In this paper, the writer tried to confirm the propriety of the above men tioned equations in his experiment, in which he examined the effect on the pressure and temperature in the intake pipe which are affected by the engine performance. The result of the experiment indicates that the increasing pressure in the intake pipe had a good effect on the volumetric efficiency, where as the increasing temperature had an ill one