Method and device for determining energization data for an actuator of an injection valve of a motor vehicle

1. A method for operating an actuator of an injection valve of a motor vehicle, the method comprising:

receiving input data at a control unit, the input data including at least one datum selected from the group consisting of: a rail pressure, a position of an accelerator pedal, a temperature of a fuel upstream of a high-pressure pump, and a temperature of the actuator; and

determining resulting energization data based on the received input data with the control unit;

wherein determining the resulting energization data includes using a polynomial regression model to determine an energization period, a setpoint current strength, and an absolute current strength;

wherein the polynomial regression accounts for at least one parameters selected from the group consisting of: a desired actuator voltage, a desired actuator charge, a desired opening behavior of the injection valve, a desired oscillation behavior of the injection valve, an internal resistance of the actuator, and a maximum time window available for energization of the actuator; and

adjusting a current input to the actuator based on the energization data and a desired charging time.

2. The method as claimed in claim 1 , wherein the control unit determines the energization data as a function of an operating point.

3. The method as claimed in claim 1 , further comprising determining an energization period with the control unit.

4. The method as claimed in claim 3 , further comprising determining a current profile with the control unit.

5. The method as claimed in claim 4 , further comprising determining a current strength at predefined times of the energization period with the control unit.

6. The method as claimed in claim 1 , wherein the input data includes information about a desired piezo voltage.

7. The method as claimed in claim 1 , wherein the input data includes information about a desired piezo charge.

8. The method as claimed in claim 1 , wherein the input data includes information about a desired behavior of the actuator.

9. The method as claimed in claim 1 , wherein the input data includes information about a desired oscillation behavior of the actuator.

10. The method as claimed in claim 1 , wherein the input data includes temperature information.

11. The method as claimed in claim 1 , wherein the input data includes information about one or more individual parameters of the actuator.

12. The method as claimed in claim 1 , wherein the input data includes information about a maximum available energization time window.

13. The method as claimed in claim 1 , wherein the actuator comprises an electromechanical or an electromagnetic transducer.

14. The method as claimed in claim 1 , wherein the actuator comprises a piezo actuator.

15. A control unit for an actuator of an injection valve in a motor vehicle, the control unit comprising:

a processor with access to a memory; and

a data feed receiving input data;

wherein the memory stores instructions for execution by the processor for determining resulting energization data for the actuator based on the input data using a polynomial regression model, wherein the resulting energization data includes an energization period, a setpoint current strength, and an absolute current strength; and

the processor is programmed to adjust a current input to the actuator based on the energization data and a desired charging time;

wherein the input data includes at least one datum selected from the group consisting of: a rail pressure, a position of an accelerator pedal, a temperature of a fuel upstream of a high-pressure pump, and a temperature of the actuator; and

wherein the polynomial regression accounts for at least one parameters selected from the group consisting of: a desired actuator voltage, a desired actuator charge, a desired opening behavior of the injection valve, a desired oscillation behavior of the injection valve, an internal resistance of the actuator, and a maximum time window available for energization of the actuator.