A method and apparatus for monitoring and determining the functional status of an electromagnetic valve

摘要

The present invention provides a method and apparatus for determining the functional status of an electromagnetic valve (10) having a solenoid (16) and plunger (14) including determining the electro-mechanical switching time of a valve based on characteristics of an electrical characteristic responsive to the solenoid; comparing the valve electro-mechanical switching time to a predetermined value; and generating a valve status signal dependant on the results of the comparison.