Research of Technical Standards of Engine Accessory Drive System Components

Examined actual poly V-belt fatigue damage examples in use and impact of environment temperature,pulley diameter and installation tension on its life,on the basis of special scheme verification and statistic treatment of test data,a standard of poly V-belt fatigue life index was proposed.For mechanical automatic tensioner,its static and dynamic torque characteristics were analyzed,and the average damping rate,a index assessing its dynamic torque characteristics,was introduced and specified its proper limits of 20%~60%.A set of high-temperature contamination-tolerance test specifications was independently developed to evaluate the tentioner durability and work out its durability index standard.At last,A Set of Technical Requirements and Acceeptance Standards of the V-Belt and the Automatic Tensioner are completed and proved to be feasible in actual use.