Patent ID: 11940059
Assignee: CONTINENTAL TEVES AG & CO. OHG
Field: Measurement (Instruments)
Classification: CPC F  G  H | IPC F  G  H

Claim 10:
11. A method for determining a switching state of a valve which is actuated by a coil, the method comprising:
respectively ascertaining a current flowing through the coil and a voltage applied to the c oil at several times following one another with a specified time interval,
calculating an inductance variable of the coil on the basis of the currents, the voltage and the specified time interval, and
determining the switching state of the valve on the basis of the inductance variable of the coil,
wherein the inductance variable of the coil is ascertained by a linear equation, in which a first column vector is set equal to a matrix multiplied by a second column vector,
wherein the times are numbered with index k,
wherein the first column vector contains in row k a difference between the current at time k+1 minus the current at time k,
wherein the matrix has two columns,
wherein the first column of the matrix contains in row k a sum of the voltage at time k+1 and the voltage at time k,
wherein the second column of the matrix contains in row k a sum of the current at time k+1 and the current at time k, and
wherein the second column vector contains a first parameter in its first row and a second parameter in its second row.