Method for detecting knocking
First Claim
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1. A method of detecting knocking of an internal combustion engine, comprising the steps of:
- specifying a normal range of engine noise for a plurality of operating points of the engine;
determining when an engine noise deviates from the normal range of engine noise;
multiplying a knocking threshold by a weighting factor not equal to 1 when the engine noise deviates from the normal range of engine noise;
sensing a knocking signal; and
detecting knocking when the sensed knocking signal exceeds the knocking threshold.
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Abstract
A method for detecting knocking provides for weighting or limitation of the knocking threshold. For this purpose, on the one hand a normal range of the reference level is defined and in the case of a deviation from this normal range the knocking threshold is multiplied by a weighting factor less than 1 and, alternatively, the knocking threshold is limited when a prescribable limit value is reached.
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Citations
10 Claims
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1. A method of detecting knocking of an internal combustion engine, comprising the steps of:
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specifying a normal range of engine noise for a plurality of operating points of the engine; determining when an engine noise deviates from the normal range of engine noise; multiplying a knocking threshold by a weighting factor not equal to 1 when the engine noise deviates from the normal range of engine noise; sensing a knocking signal; and detecting knocking when the sensed knocking signal exceeds the knocking threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for detecting knocking of an internal combustion engine, comprising the steps of:
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specifying a normal range of engine noise for a plurality of operating points of the engine; determining when an engine noise deviates from the normal range of engine noise; multiplying a knocking threshold by a weighting factor not equal to 1 when the engine noise deviates from the normal range of engine noise; limiting the knocking threshold to a first limit value; sensing a knocking signal; and detecting knocking when the sensed knocking signal exceeds the knocking threshold. - View Dependent Claims (10)
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Specification