METHOD FOR DETERMINING THE VALVE OPENING MOMENT IN PIEZO SERVO-DRIVEN INJECTORS

摘要

the present invention is the piezoelectric element as a servo operation using a piezoelectric sensor elements - to a method for determining a valve opening moment on the driven injector. The voltage and the amount of charge at the end of the charging process of the piezoelectric operating member is measured and the temporary scaling factor is identified on the basis of this measurement. In this way, the approximate value of the valve opening moments is obtained, the voltage and the charge amount is measured again at this point. The new scaling factor is determined by a calculation operation corresponding to. Finally, the valve opening moment is determined with the help of the new scaling factor. This moment can be determined by online. ;