Methods and systems to derive knock sensor conditions
First Claim
Patent Images
1. A method of diagnosing a knock sensor comprising:
- receiving knock sensor data from the knock sensor, wherein the knock sensor is configured to be coupled to an engine;
applying one or more filters to the knock sensor data to derive one or more events from the knock sensor data; and
comparing the one or more events to expected engine data to evaluate whether the knock sensor is functioning properly and correctly wired, functioning properly and miswired, or not functioning properly.
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Abstract
A method of diagnosing a knock sensor includes steps of receiving data from the knock sensor, the knock sensor configured to be coupled to an engine, processing the data to derive one or more events from the data, and determining whether the one or more events took place at a known time or a known crank position.
108 Citations
20 Claims
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1. A method of diagnosing a knock sensor comprising:
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receiving knock sensor data from the knock sensor, wherein the knock sensor is configured to be coupled to an engine; applying one or more filters to the knock sensor data to derive one or more events from the knock sensor data; and comparing the one or more events to expected engine data to evaluate whether the knock sensor is functioning properly and correctly wired, functioning properly and miswired, or not functioning properly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
an engine control unit (ECU) configured to control an engine, wherein the ECU comprises a processor configured to; receive a noise signal sensed by a knock sensor, wherein the knock sensor is configured to be coupled to an engine; apply one or more filters to the noise signal to derive a combustion signature, a valve signature, and one or more events from the noise signal; and compare the one or more events to expected engine data to evaluate whether the knock sensor is functioning properly and correctly wired, functioning properly and miswired, or not functioning properly. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A non-transitory computer readable medium comprising executable instructions that when executed cause a processor to:
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receive engine noise data from a knock sensor, wherein the knock sensor is configured to be coupled to an engine; apply one or more filters to the engine noise data to derive a combustion signature, derive a valve signature, and derive one or more events from the data; and use a lookup table to compare the one or more events to expected engine data to evaluate whether the knock sensor is functioning properly and correctly wired, functioning properly and miswired, or not functioning properly. - View Dependent Claims (17, 18, 19, 20)
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Specification