DIRECT INJECTION SOLENOID INJECTOR OPENING TIME DETECTION

摘要

PROBLEM TO BE SOLVED: To provide a reliable detection of injector opening time for each injection.SOLUTION: A direct injection, solenoid fuel injector includes at least one current sensing function capable of detecting a current draw of the solenoid, and a controller function. The controller is capable of determining a fully open time of the direct fuel injector solenoid on the basis of the application of a slope inflection filter and a slope discrimination filter to a derivative of the current draw.