Diagnostic Parameter of Wear of a Piston–Bush–Cylinder System

Abstract

It is shown that the intensity of gas scavenging to the crankshaft box of a gas internal-combustion engine in the course of its startup is a convenient parameter that enables one to determine not only the amount of the used fuel but also the compactness of a piston–bush–cylinder system. This is true both for the “hot” and a “cold” engines. However, the coefficient of linear correlation for the hot engine at an oil temperature of 70 °C is higher than the corresponding coefficient for the cold engine (0°C). Clearly, this is explained by the fact that, in the course of startup of the cold engine, oil is rapidly heated and its viscosity changes.