Fig.2.23.Camshaft sprocket: 1 - an asterisk of a camshaft;2 - actuator variable valve timing
The design uses a camshaft sprocket doped alloy of high rigidity, hardened to increase the abrasion resistance at the point of contact with the timing chain drive. On engines of models L3 asterisk intake camshaft actuator combined with a variable valve timing system (Fig. 2.23).