Patent Document ID: 20100312416
Application ID: 12784070
Patent Flag: 0

Claim One:
1. A method for controlling the temperature of a glow plug, wherein a setpoint temperature is used to determine a setpoint value of a temperature-dependent electric variable, and an effective voltage which is generated by pulse width modulation is applied to the glow plug, wherein a mathematical model, which calculates an output variable from an input variable and provides the output variable at its output, is used to calculate an expected value of the electric variable, the electric variable is measured, a first error signal e 1 is generated by evaluating the calculated value, a value calculated from the value of the effective voltage and the error signal is used as the input variable of the mathematical model, wherein the mathematical model calculates an output variable from the input variable, said output variable defining the expected value of the electric variable, and the output variable of the mathematical model is used to calculate a corrected value for the effective voltage and the effective voltage is changed to the corrected value.