Methods and apparatuses for combustion diagnosis and control of internal combustion engines using accelerometers
First Claim
1. An apparatus, comprising:
- a filter circuit structured to filter vibration data within a predetermined engine combustion time period, the vibration data indicative of a vibration of an internal combustion engine, the vibration data including voltage signals;
a PCP determination circuit operatively and communicably coupled to the filter circuit and structured to determine a peak cylinder pressure (PCP) of a combustion cycle of the internal combustion engine based on the filtered vibration data, the PCP corresponding to a maximum of absolute levels of the voltage signals or a difference between the maximum and a minimum of the absolute levels of the voltage signals;
a LPP determination circuit operatively and communicably coupled to the filter circuit and structured to determine a location of peak cylinder pressure (LPP) of the combustion cycle of the internal combustion engine based on the filtered vibration data, the PCP and the LPP indicative of a performance characteristic of the combustion cycle; and
an ignition timing circuit operatively and communicably coupled to the PCP determination circuit and the LPP determination circuit, wherein the ignition timing circuit is structured to modify an ignition timing of the internal combustion engine based on the determined PCP and LPP.
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Abstract
Methods and systems for diagnosis and control of an internal combustion engine using vibration data obtained from a vibration sensor mounted on the engine includes filtering vibration data within a predetermined engine combustion time period, where the vibration data is indicative of a vibration of an internal combustion engine, determining a peak cylinder pressure (PCP) of a combustion cycle of the internal combustion engine based on the filtered vibration data, determining a location of peak cylinder pressure (LPP) of the combustion cycle of the internal combustion engine based on the filtered vibration data, where the PCP and the LPP are indicative of a performance characteristic of the combustion cycle, and modifying an ignition timing of the internal combustion engine based on the determined PCP and LPP.
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Citations
24 Claims
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1. An apparatus, comprising:
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a filter circuit structured to filter vibration data within a predetermined engine combustion time period, the vibration data indicative of a vibration of an internal combustion engine, the vibration data including voltage signals; a PCP determination circuit operatively and communicably coupled to the filter circuit and structured to determine a peak cylinder pressure (PCP) of a combustion cycle of the internal combustion engine based on the filtered vibration data, the PCP corresponding to a maximum of absolute levels of the voltage signals or a difference between the maximum and a minimum of the absolute levels of the voltage signals; a LPP determination circuit operatively and communicably coupled to the filter circuit and structured to determine a location of peak cylinder pressure (LPP) of the combustion cycle of the internal combustion engine based on the filtered vibration data, the PCP and the LPP indicative of a performance characteristic of the combustion cycle; and an ignition timing circuit operatively and communicably coupled to the PCP determination circuit and the LPP determination circuit, wherein the ignition timing circuit is structured to modify an ignition timing of the internal combustion engine based on the determined PCP and LPP. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system, comprising:
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a vibration sensor communicably coupled to the internal combustion engine and structured to acquire vibration data indicative of a vibration of an internal combustion engine, the vibration data including voltage signals; and a controller communicatively coupled with the vibration sensor, the controller structured to; filter the vibration data within a predetermined engine combustion time period; determine a peak cylinder pressure (PCP) of a combustion cycle of the internal combustion engine based on the filtered vibration data, the PCP corresponding to a maximum of absolute levels of the voltage signals or a difference between the maximum and a minimum of the absolute levels of the voltage signals; determine a location of peak cylinder pressure (LPP) of the combustion cycle of the internal combustion engine based on the filtered vibration data, the PCP and the LPP indicative of a performance characteristic of the combustion cycle; and modify an ignition timing of the internal combustion engine based on the determined PCP and LPP. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method, comprising:
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filtering vibration data within a predetermined engine combustion time period, the vibration data indicative of a vibration of an internal combustion engine, the vibration data including voltage signals; determining a peak cylinder pressure (PCP) of a combustion cycle of the internal combustion engine based on the filtered vibration data, the PCP corresponding to a maximum of absolute levels of the voltage signals or a difference between the maximum and a minimum of the absolute levels of the voltage signals; determining a location of peak cylinder pressure (LPP) of the combustion cycle of the internal combustion engine based on the filtered vibration data, the PCP and the LPP indicative of a performance characteristic of the combustion cycle; and modifying an ignition timing of the internal combustion engine based on the determined PCP and LPP. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification