liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
An Investigation of Maximum Brake Torque Timing based on Ionization Current Feedback
Linköping University, Department of Electrical Engineering.
2007 (English)Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesisAlternative title
Tändningstidpunkt för Maximalt Arbete baserat på Jonströmsåterkoppling (Swedish)
Abstract [en]

For every operating condition of an internal combustion engine there exists an optimal spark timing, called maximum brake torque (MBT), which maximises the output torque and the efficiency of the engine. Traditionally MBT timing is implemented as an open-loop control where the ignition timing is found by using a combination of static lookup tables and sensor information. With a direct closed-loop control from the combustion process the performance of internal combustion engines could be improved. The thesis investigates if it is possible to estimate the MBT timing from the ionization current for every operating condition of a spark ignited engine where the operating conditions are defined by the engine parameters lambda, internal exhaust gas recirculation, engine load, engine speed and spark advance.

First an investigation of how much loss of torque an error from the MBT position corresponds to is made. Then the influence of the engine parameters on the shape of the ionization current was studied. Last different peak pressure position (PPP) estimating algorithms are presented and a new technique is developed where an engine operating point dependant part of the ionization current is used depending on the current operating condition of the engine. Two of the presented PPP estimating algorithms are then complemented with this technique and the results look promising.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2007. , 50 p.
Keyword [en]
MBT timing, maximum brake torque, spark advance, PPP
Keyword [sv]
tändningstidpunkt, maximalt arbete, MBT, jonström, jonströmsåterkoppling, PPP
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:liu:diva-9506ISRN: LITH-ISY-EX--06/3809--SEOAI: oai:DiVA.org:liu-9506DiVA: diva2:23960
Presentation
2007-04-13, Algoritmen, Bhuset, 58183 Linköping, Linköping University, 13:00
Uppsok
teknik
Supervisors
Examiners
Available from: 2007-07-10 Created: 2007-07-10

Open Access in DiVA

fulltext(2209 kB)3153 downloads
File information
File name FULLTEXT01.pdfFile size 2209 kBChecksum MD5
0e30c09e7cc9d647505b86a61a484530f6948cb2d5c9e0169e05a2e9d56ab126e9cfc40a
Type fulltextMimetype application/pdf

By organisation
Department of Electrical Engineering
Vehicle Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 3153 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 3001 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf