Patent ID: 9200580
Filing Date: 2015-12-01
Classification: F02D,F02M

Abstract:
1. A method for operating an indirectly-driven injection valve having a longitudinal axis, a nozzle needle in a valve space, a control valve in a control space and an actuator which is embodied as a solid actuator in an actuator space, wherein the actuator is designed to act on the control valve, and the control valve is designed to act on the nozzle needle, wherein the nozzle needle is designed to prevent, in a closed position, a flow of fluid through at least one injection opening and otherwise to enable the flow of fluid, the method comprising: feeding different predefined quantities of electrical energy to the actuator in a plurality of adaptation passes in order to change an axial length of the actuator, for each respective adaptation pass: determining, for a particular adaptation pass, that the voltage difference value is less than the predefined threshold value, which indicates that axial position of the nozzle needle remains unchanged throughout the feeding of the predefined quantity of electrical energy, and in response to such determination, discharging the actuator and executing a subsequent adaptation pass using a different predefined quantity of electrical energy, such that the particular adaptation pass involves electrically charging and discharging the actuator without causing an axial movement of the nozzle needle, and determining, for the subsequent adaptation pass, that the voltage difference value is greater than or equal to the predefined threshold value, and in response to such determination: