Patent ID: 6701876
Filing Date: 2004-03-09
Classification: F01L,F16K

Abstract:
An electromechanical engine valve actuation system comprising:a control element; a first actuator; a second actuator; an armature element positioned between said first actuator and said second actuator; and a motion detector generating a signal in relation to said armature element's position, said motion detector element sending said signal to said controller element when said armature element reaches a midpoint between said first actuator and said second actuator, wherein said control element controls said first actuator and said second actuator in response to said signal to reduce the impact of said armature element by rapidly unpowering said first actuator, followed by rapidly first powering said second actuator when said armature element reaches said midpoint, rapidly unpowering said second actuator immediately after said first powering to allow said armature element to freewheel towards said second actuator, and second powering said second actuator with a holding current when said armature element reaches said second actuator.