Arrangement for monitoring rotational speed sensor
First Claim
1. An arrangement for monitoring a rotational speed sensor of an internal combustion engine having a starter and a rotational speed sensor which supplies an output signal in dependence on a rotational speed, the arrangement comprising means for measuring a vehicle electrical system voltage;
- a control device in which an output signal of the rotational speed sensor is related to a vehicle electrical system voltage; and
means for recognizing an error operation of the rotational speed sensor so that a course of the vehicle electrical system voltage is evaluated during a starting process of the internal combustion engine, and an error recognition is released only when a typical course of a starting process for the vehicle electrical system voltage is recognized and simultaneously no output signal of the rotational speed sensor is recognized.
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Accused Products
Abstract
An arrangement for monitoring a rotational speed sensor of an internal combustion engine having a starter and a rotational speed sensor which supplies an output signal in dependence on a rotational speed, has a unit for measuring a vehicle electrical system voltage, and a control device in which an output signal of the rotational speed sensor is related to a vehicle electrical system voltage and an error operation of the rotational speed sensor is monitored. The measuring unit and the control device are formed so that for error recognition a course of the vehicle electrical system voltage is evaluated during a starting process of the internal combustion engine, and an error recognition is released only when a typical course of a starting process for the vehicle electrical system voltage is recognized and simultaneously no output signal of the rotational speed sensor is recognized.
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Citations
12 Claims
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1. An arrangement for monitoring a rotational speed sensor of an internal combustion engine having a starter and a rotational speed sensor which supplies an output signal in dependence on a rotational speed, the arrangement comprising means for measuring a vehicle electrical system voltage;
- a control device in which an output signal of the rotational speed sensor is related to a vehicle electrical system voltage; and
means for recognizing an error operation of the rotational speed sensor so that a course of the vehicle electrical system voltage is evaluated during a starting process of the internal combustion engine, and an error recognition is released only when a typical course of a starting process for the vehicle electrical system voltage is recognized and simultaneously no output signal of the rotational speed sensor is recognized. - View Dependent Claims (2, 3, 4, 5, 6)
- a control device in which an output signal of the rotational speed sensor is related to a vehicle electrical system voltage; and
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7. A method of monitoring a rotational speed sensor of an internal combustion engine having a starter and a rotational speed sensor, comprising the steps of supplying an output of the rotational speed sensor in dependence on a rotational speed;
- measuring a vehicle electrical system voltage by measuring means;
setting the output signal of the rotational speed sensor in reference to the vehicle electrical system voltage; and
recognizing an error operation of the rotational speed sensor, said recognizing includes evaluating a course of the vehicle electrical system voltage during a starting process of the internal combustion engine, and releasing an error recognition only when a typical course of the vehicle electrical system voltage for the starting process is recognized and simultaneously no output signal of the rotational speed sensor is recognized. - View Dependent Claims (8, 9, 10, 11, 12)
- measuring a vehicle electrical system voltage by measuring means;
Specification