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Knock Sensor Based Virtual Cylinder Pressure Sensor
2019 (English)In: SAE technical paper series, ISSN 0148-7191, Vol. 2019-January, no JanuaryArticle in journal (Refereed) Published
Abstract [en]

Typically the combustion in a direct injected compression ignited internal combustion engine is open-loop controlled. The introduction of a cylinder pressure sensor opens up the possibility of a virtual combustion sensor which could enable closed-loop combustion control and thus the potential to counteract effects such as engine part to part variation, component ageing and fuel quality diversity. Closed-loop combustion control requires precise, robust and preferably cheap sensors. This paper presents a virtual cylinder pressure sensor based on the signal from the inexpensive but well proven knock sensor. The method used to convert the knock sensor signal into a pressure estimate included the stages: Phase correcting the raw signal, Filtering the raw signal, Scaling the signal to known thermodynamic laws and provided engine sensors signals and Reconstructing parts of the signal with other known models and assumptions. The modelled cylinder pressure shows high correlation with the measured pressure trace and it was concluded that it is possible to estimate many important combustion parameters - such as maximum pressure, mass fraction burned and total heat release.

Place, publisher, year, edition, pages
SAE International , 2019. Vol. 2019-January, no January
Keywords [en]
Closed loop control systems, Combustion, Combustion knock, Direct injection, Engine cylinders, Fuels, Powertrains, Pressure sensors, Quality control, Combustion control, Combustion parameters, Combustion sensors, Cylinder pressure sensor, Cylinder pressures, Maximum pressure, Thermodynamic laws, Total heat release, Signal reconstruction
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-248280DOI: 10.4271/2019-01-0040Scopus ID: 2-s2.0-85060521437OAI: oai:DiVA.org:kth-248280DiVA, id: diva2:1302588
Conference
22 January 2019 through 24 January 2019
Note

QC 20190405

Available from: 2019-04-05 Created: 2019-04-05 Last updated: 2019-04-05Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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  • vancouver
  • Other style
More styles
Language
  • de-DE
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  • nn-NB
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  • Other locale
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