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
Estimation of Indicated– and Load– Torque from Engine Speed Variations
Linköping University, Department of Electrical Engineering.
2006 (English)Independent thesis Basic level (professional degree), 20 points / 30 hpStudent thesis
Abstract [en]

The importance of control systems and diagnostics in vehicles are increasing and has resulted in several new methods to calculate better control signals. The performance can be increased by calculating these signals close to optimum, but that also require more and precise information regarding the system.

One of the wanted control signals are the crankshaft torque and the thesis presents two different methods to estimate this torque using engine speed variations. These methods are Modeling of the Crankshaft and Frequency Analysis. The methods are evaluated and implemented on for a four cylinder SAAB engine. Measurements are made in an engine test cell as well as a vehicle.

The results show that the Modeling of the Crankshaft method does not produce a satisfying estimation, with a difference of about 200% between estimated and calculated torque. On the other hand, the Frequency Analysis provides an accurate estimation of both mean and instantaneous indicated torque, with a maximum difference of ±20% between estimated and calculated torque.

Place, publisher, year, edition, pages
Institutionen för systemteknik , 2006. , 70 p.
Keyword [en]
Torque estimation, Indicated torque, Load torque, Crankshaft model, Frequency analysis
National Category
Information Science
Identifiers
URN: urn:nbn:se:liu:diva-7097ISRN: LiTH-ISY-EX--06/3793--SEOAI: oai:DiVA.org:liu-7097DiVA: diva2:22165
Presentation
2006-06-02, Glashuset, B-huset, Ingång 23, Linköping, 13:00
Uppsok
teknik
Supervisors
Examiners
Available from: 2006-07-14 Created: 2006-07-14

Open Access in DiVA

fulltext(584 kB)2729 downloads
File information
File name FULLTEXT01.pdfFile size 584 kBChecksum SHA-1
fb925337e0bfcdbdced09294581528d786794b7d6c1245d96e2642f48661947bd86b5df3
Type fulltextMimetype application/pdf

By organisation
Department of Electrical Engineering
Information Science

Search outside of DiVA

GoogleGoogle Scholar
Total: 2729 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: 669 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