Control process for variable-lift valve involves reporting closing duration before start of closing, using time of control event as start of closing

摘要

The control process is for a hydraulic setter operating a variable-lift valve in the valve system of an engine or compressor. The control event initiates a closing phase of the valve and then closes the valve to a closing point The time of the control event is considered the start of closing, i.e. the actual set value (wem2). Before this, a closing duration is set between the start of closing and the closure time point, which is reported depending on the operating conditions of the valve setting system.