motor valve actuation system comprising backlash prevention valve actuation movement

摘要

A motor valve actuation system comprises a main valve actuation motion source configured to provide main valve actuation motions for the at least one motor valve through a main motion load path, and a main source of motion. auxiliary valve drive movement separated from the main valve drive movement source and configured to provide complementary auxiliary valve drive movements to the at least one engine valve via an auxiliary motion load path. a lost motion component is configured in one state to maintain the clearance between the auxiliary valve drive motion source and the auxiliary motion load path or within the auxiliary motion load path and in another state to occupy This time off. the auxiliary valve actuation motion source is further configured to provide at least one backlash prevention valve actuation motion which substantially corresponds to at least one of the main valve actuation movements.