Determining engine cylinder contribution from indexed engine data
First Claim
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1. A signal processing system for generating an engine signature from indexed engine data, the system comprising:
- a buffering unit configured to receive the indexed engine data;
an engine data repair unit operatively coupled to the buffering unit and configured to generate reconstructed engine data;
a synchronization unit operatively coupled to the engine data repair unit and configured to produce an engine cycles signal; and
a filter operatively coupled to the synchronization unit and configured to filter the engine cycles signal to produce the engine signature.
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Abstract
An engine diagnostic system is provided that enables a service technician to evaluate engine cylinder contribution to output power. The service technician couples one or more signal leads to the vehicle'"'"'s battery, alternator, or accessory receptacle (e.g., cigarette lighter receptacle) to provide an alternator output signal to a signal analyzer. The signal analyzer processes the alternator output signal to generate an engine signature, which represents engine cylinder contribution to engine output power.
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Citations
45 Claims
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1. A signal processing system for generating an engine signature from indexed engine data, the system comprising:
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a buffering unit configured to receive the indexed engine data;
an engine data repair unit operatively coupled to the buffering unit and configured to generate reconstructed engine data;
a synchronization unit operatively coupled to the engine data repair unit and configured to produce an engine cycles signal; and
a filter operatively coupled to the synchronization unit and configured to filter the engine cycles signal to produce the engine signature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for processing indexed engine data, the system comprising:
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means for calculating a number of indexed engine samples per engine cycle; and
means for constructing an engine cycles signal using the number of indexed engine sample per engine cycle. - View Dependent Claims (22, 23, 24, 25)
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26. An engine data repair system comprising:
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means for receiving indexed engine data and at least one error tag; and
means for creating an interpolation of the indexed engine data based on the at least one error tag. - View Dependent Claims (27)
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28. A method for generating an engine signature from indexed engine data, the method comprising:
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receiving the indexed engine data;
generating reconstructed engine data;
producing an engine cycles signal; and
filtering the engine cycles signal to produce the engine signature. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A method for processing indexed engine data, the method comprising:
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calculating a number of indexed engine samples per engine cycle; and
constructing an engine cycles signal using the number of indexed engine sample per engine cycle. - View Dependent Claims (41, 42)
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43. A method for repairing engine data, the method comprising:
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receiving indexed engine data and at least one error tag; and
creating an interpolation of the indexed engine data based on the at least one error tag. - View Dependent Claims (44)
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45. A signal processing system for generating an engine signature from indexed engine data, the system comprising:
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means for receiving the indexed engine data;
means for generating reconstructed engine data;
means for producing an engine cycles signal; and
means for filtering the engine cycles signal to produce the engine signature.
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Specification