METHOD AND DEVICE FOR CONTROLLING PIEZO ACTUATOR OF INJECTION VALVE OF MOTOR VEHICLE

• Main Authors: KATZENBERGER MICHAEL, KAUSCHE MICHAEL, KRAMEL MANFRED
• Format: Patent
• Language: Chinese; English
• Published: 15.03.2019
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

The invention relates to a method for controlling a piezo actuator of an injection valve of a fuel injection system, comprising the following steps: determining control signals for the piezo actuatorusing a stored current/voltage characteristic curve for carrying out an injection process; detecting the course of the current flowing through the piezo actuator during the injection process and the course of the voltage at the piezo actuator during the injection process; adapting the stored current/voltage characteristic curve using the detected current course and the detected voltage course; anddetermining control signals for the piezo actuator using the stored adapted current/voltage characteristic curve for carrying out a subsequent injection process. The invention also relates to a device for controlling a piezo actuator of an injection valve of a fuel injection system. 本发明涉及用于促动燃料喷射系统的喷射阀的压电促动器的方法，该方法包括如下步骤：使用所存储的电流/电压特征曲线来识别用于执行喷射过程的用于压电促动器的促动信号，检测在喷射过程期间流动通过压电促动器的电流的走势、以及在喷射过程期间被施加到压电促动器的电压的走势，使用所检测的电流走势和所