On the Prevention of Fatigue Failures of Valve Springs of Internal-Combustion Engines (2nd Report)

Abstract

Some results previously reported by the auther, concerning the repeated shearing stresses cvalve springs in surge of internal combustion engine, are examined by the improved test method. It is ascertained that the ranges of the repeated shearing stresses attain maximum value at a point situated near the both ends of the effective coils, in surge. Also reported, insertion of a thin rubber plate between the upper end of the spring and the spring retaining plate reduces these shearing stresses to a remarkable degree.