Torsionally compliant sprocket system for balance shaft drive

摘要

The present invention relates to a torsionally compliant sprocket assembly which reduces the transfer of the crankshaft torsional oscillations to other components in the engine such as the balance shaft drives. The assembly comprises a first sprocket (3,5), second sprocket (2) and a planar torsion spring (15) located between the second sprockets (2) and the shaft (20).