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Hellring, Magnus
Publications (2 of 2) Show all publications
Hellring, M. & Holmberg, U. (2001). A Comparison of Ion Current Based Algorithms for Peak Pressure Position Control. Paper presented at Conference of International Spring Fuels and Lubricants Meeting and Exhibition, Orlando, FL, United States, 7-9 May, 2001. SAE technical paper series, Article ID 2001-01-1920.
Open this publication in new window or tab >>A Comparison of Ion Current Based Algorithms for Peak Pressure Position Control
2001 (English)In: SAE technical paper series, ISSN 0148-7191, article id 2001-01-1920Article in journal (Refereed) Published
Abstract [en]

Combustion timing control of SI engines can be improved by feedback of the peak pressure position (PPP). However, pressure sensors are costly, and therefore, nonintrusive and cheap ion-current ’soft sensors’ have been suggested. Three different algorithms have been proposed that extract information about PPP from the ion current signal. In this paper, these approaches are compared with respect to accuracy, operational range, implementation aspects, as well as sensitivity to engine load and inlet air humidity. Copyright © 2001 Society of Automotive Engineers, Inc.

Place, publisher, year, edition, pages
Warrendale, PA: Society of Automobile Engineers, 2001
Keywords
Combustion timings, Engine load, Implementation aspects, Inlet air, Ion currents, Ion-current signal, Non-intrusive, Operational range, Peak pressure position, SI Engines, Soft sensors, Algorithms, Exhibitions, Internet protocols, Ions
National Category
Control Engineering
Identifiers
urn:nbn:se:hh:diva-37630 (URN)10.4271/2001-01-1920 (DOI)2-s2.0-84877228944 (Scopus ID)
Conference
Conference of International Spring Fuels and Lubricants Meeting and Exhibition, Orlando, FL, United States, 7-9 May, 2001
Available from: 2018-07-19 Created: 2018-07-19 Last updated: 2018-07-19Bibliographically approved
Hellring, M. & Holmberg, U. (2000). An ion current based peak-finding algorithm for pressure peak position estimation. Paper presented at International Fall Fuels and Lubricants Meeting and Exposition, Baltimore, MD, United States, 16-19 October, 2000. SAE technical paper series, Article ID 2000-01-2829.
Open this publication in new window or tab >>An ion current based peak-finding algorithm for pressure peak position estimation
2000 (English)In: SAE technical paper series, ISSN 0148-7191, article id 2000-01-2829Article in journal (Refereed) Published
Abstract [en]

In this paper a novel ion current based estimation scheme for the in-cylinder pressure peak position (PPP) is proposed. A reliable estimate is constructed by appropriate signal processing based on local curvatures of the post flame phase of the ion current. The peak-finding algorithm is simple and easy to implement in an engine control unit for feedback control of the combustion phasing. Results on real data, sampled onboard a commercial car are presented. Further, the performance of the algorithm is compared to two state of the art algorithms for PPP estimation from the ion current. The comparison shows that the algorithm presented in this paper outperforms its competitors. Copyright © 2000 Society of Automotive Engineers, Inc.

Place, publisher, year, edition, pages
Warrendale, PA: Society of Automobile Engineers, 2000
Keywords
Combustion phasing, Engine control unit, Estimation schemes, Ion currents, Local curvature, Peak-finding algorithms, Pressure peaks, Reliable estimates, Two-state, Algorithms, Estimation, Exhibitions, Internet protocols, Signal processing, Ions
National Category
Control Engineering
Identifiers
urn:nbn:se:hh:diva-37634 (URN)10.4271/2000-01-2829 (DOI)2-s2.0-84877449898 (Scopus ID)
Conference
International Fall Fuels and Lubricants Meeting and Exposition, Baltimore, MD, United States, 16-19 October, 2000
Available from: 2018-07-19 Created: 2018-07-19 Last updated: 2018-07-19Bibliographically approved
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