CONTROL UNIT AND METHOD FOR MONITORING THE FUNCTION OF AN ELECTROMAGNETIC ACTUATOR
First Claim
1. A method for monitoring the function of an electromagnetic actuator, comprising:
- shifting a magnetic core within the electromagnetic actuator by supplying a current to an electric coil;
measuring of a temporally varying current flowing through the electric coil;
selecting of a temporal evaluation section of a course of the temporally varying current, wherein the temporally varying current changes from a current value at a beginning of the temporal section to a current value at an end of the section, wherein the temporal evaluation section lasts for a duration period;
forming of an evaluation product from factors which comprise at least the current value at the beginning of the section and the current value at the end of the section as well as the duration period of the section; and
detecting of an error function of the actuator by comparing the evaluation product with an evaluation product limit.
1 Assignment
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Accused Products
Abstract
A magnetic core and an electric coil, wherein the magnetic core is configured to move by supplying current to the electric coil to allow electrical energy to be transformed into mechanical energy and an electromagnetic actuator operates a valve body to move, and a controller configured to measure a current flowing through the electric coil, select a temporal evaluation section of a course of the current, wherein the current changes from a current value at a beginning of the temporal section to a current value at an end of the section, wherein the evaluation section lasts for a duration period, form an evaluation product from at least the current value at the beginning of the section, the current value at the end of the section, and the duration period of the section, and detect an error function of the actuator by comparing the evaluation product with an evaluation product limit.
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Citations
20 Claims
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1. A method for monitoring the function of an electromagnetic actuator, comprising:
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shifting a magnetic core within the electromagnetic actuator by supplying a current to an electric coil; measuring of a temporally varying current flowing through the electric coil; selecting of a temporal evaluation section of a course of the temporally varying current, wherein the temporally varying current changes from a current value at a beginning of the temporal section to a current value at an end of the section, wherein the temporal evaluation section lasts for a duration period; forming of an evaluation product from factors which comprise at least the current value at the beginning of the section and the current value at the end of the section as well as the duration period of the section; and detecting of an error function of the actuator by comparing the evaluation product with an evaluation product limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. (canceled)
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11. A method for monitoring a function of an electromagnetic actuator, comprising:
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measuring of a current flowing through an electric coil; selecting of a temporal evaluation section of a course of the current, wherein the current changes from a current value at a beginning of the temporal section to a current value at an end of the section, wherein the temporal evaluation section lasts for a duration period; forming of an evaluation product from at least the current value at the beginning of the section, the current value at the end of the section, and the duration period of the section; and detecting an error function of the actuator by comparing the evaluation product with an evaluation product limit. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A control valve, comprising:
a magnetic core and an electric coil, wherein the magnetic core is configured to be moved by supplying a current to the electric coil to allow electric energy to be transformed into mechanical energy and an electromagnetic actuator operates a valve body that is to be moved; and a controller configured to; measure a current flowing through the electric coil; select a temporal evaluation section of a course of the current, wherein the current changes from a current value at a beginning of the temporal section to a current value at an end of the section, wherein the temporal evaluation section lasts for a duration period; form an evaluation product from at least the current value at the beginning of the section, the current value at the end of the section, and the duration period of the section; and detect an error function of the actuator by comparing the evaluation product with an evaluation product limit. - View Dependent Claims (19, 20)
Specification