Method and device for checking the performance reliability of a timer
First Claim
1. A method for checking a performance reliability of an external timer that is arranged outside of a control unit and that supplies the control unit with time information, comprising the steps of:
- generating time information internally in the control unit;
comparing the generated time information to corresponding time information supplied by the external timer;
starting an internal time meter in the control unit; and
comparing time information supplied by the internal time meter to the time information supplied by the external timer at arbitrarily specifiable points of time.
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Accused Products
Abstract
A method and a control unit are proposed for checking the performance reliability of a timer that is arranged outside of the control unit, used in particular for controlling an internal combustion engine, and that supplies time information to the control unit, further time information being generated internally in the control unit and being compared to corresponding time information supplied by the external timer. Because an internal time meter is started in the control unit and the comparison of the time information supplied by the external timer and by the internal time meter is carried out at arbitrarily specifiable points of time, a malfunction of the external timer can be determined during the entire operating time, and furthermore, a deviation can be calculated with higher accuracy.
14 Citations
10 Claims
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1. A method for checking a performance reliability of an external timer that is arranged outside of a control unit and that supplies the control unit with time information, comprising the steps of:
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generating time information internally in the control unit;
comparing the generated time information to corresponding time information supplied by the external timer;
starting an internal time meter in the control unit; and
comparing time information supplied by the internal time meter to the time information supplied by the external timer at arbitrarily specifiable points of time. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A control unit for checking a performance reliability of an external timer that is arranged outside of the control unit and that is operatively connected to the control unit in order to transmit time information, comprising:
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a computer unit for comparing the time information transmitted by the external timer to time information generated internally in the control unit; and
an internal time meter operatively connected to the computer unit such that the time information generated by the internal time meter can be compared to the time information transmitted by the external timer at arbitrarily specifiable points of time. - View Dependent Claims (8, 9)
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10. A device, comprising:
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an external timer; and
a control unit connected to the external timer, the control unit including;
a computer unit for comparing time information transmitted by the external timer to time information generated internally in the control unit, and an internal time meter operatively connected to the computer unit such that the time information generated by the internal time meter can be compared to the time information transmitted by the external timer at arbitrarily specifiable points of time.
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Specification