| 摘要 |
The invention describes a method for operating an injector of an internal combustion engine, the nozzle needle of said injector being operated by a piezo actuator by means of a servo valve. The idle travel of the piezo actuator is eliminated by maintaining a permanent direct force connection between the piezo actuator and the servo valve, so that a change in force on the servo valve due to a change in pressure in the valve chamber when the servo valve is opened and closed and when the nozzle needle of the injector is closed is always transmitted to the piezo actuator as a change in force. The resulting change in voltage and/or capacitance of the piezo actuator is detected, and parameters with which the injection quantity output by the injector is regulated are determined from the result of the detection. A particularly high degree of quantity metering accuracy can be achieved in this way. |
