CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Modeling, Identification, and Separation of Crankshaft Dynamics in a Light-Duty Diesel Engine

Mikael Thor (Institutionen för signaler och system, Reglerteknik) ; Ingemar Andersson (Institutionen för signaler och system, Signalbehandling) ; Tomas McKelvey (Institutionen för signaler och system, Signalbehandling)
SAE Technical Paper Series 2009-01-1798, SAE 2009 International Powertrains, Fuels & Lubricants Meeting, Florence, Italy (2009)
[Konferensbidrag, refereegranskat]

Mathematical models of a torque sensor equipped crankshaft in a light-duty diesel engine are identified, validated, and compared. The models are based on in-cylinder pressure and crankshaft torque data collected from a 5-cylinder common-rail diesel engine running at multiple operating points. The work is motivated by the need of a crankshaft model in a closed-loop combustion control system based on crankshaft torque measurements. In such a system a crankshaft model is used in order to separate the measured crankshaft torque into cylinder individual torque contributions. A method for this is described and used for IMEP estimation. Not surprisingly, the results indicate that higher order models are able to estimate crankshaft torque more accurately than lower order models, even if the differences are small. For IMEP estimation using the cylinder separation method however, these differences have large effects on accuracy. Here, the performance of higher order models is significantly better than for lower order models. Also, models of odd model order perform better than models of even model order. On average, a 9th order model estimates IMEP values to within 2-3% of the reference values.



Denna post skapades 2009-06-22. Senast ändrad 2018-01-17.
CPL Pubid: 95175

 

Läs direkt!


Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för signaler och system, Reglerteknik (2005-2017)
Institutionen för signaler och system, Signalbehandling (1900-2017)

Ämnesområden

Reglerteknik
Signalbehandling

Chalmers infrastruktur