Steady state fuel consumption optimization through feedback control of estimated cylinder individual efficiency

Lewander, Magnus (författare): Lund University,Lunds universitet,Förbränningsmotorer,Institutionen för energivetenskaper,Institutioner vid LTH,Lunds Tekniska Högskola,Combustion Engines,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH

Widd, Anders (författare): Lund University,Lunds universitet,Förbränningsprocesser KCFP,Annan verksamhet, LTH,Lunds Tekniska Högskola,Institutionen för reglerteknik,Institutioner vid LTH,The Competence Centre for Combustion Processes,Other operations, LTH,Faculty of Engineering, LTH,Department of Automatic Control,Departments at LTH,Faculty of Engineering, LTH

Tunestål, Per (författare): Lund University,Lunds universitet,Förbränningsprocesser KCFP,Annan verksamhet, LTH,Lunds Tekniska Högskola,Förbränningsmotorer,Institutionen för energivetenskaper,Institutioner vid LTH,The Competence Centre for Combustion Processes,Other operations, LTH,Faculty of Engineering, LTH,Combustion Engines,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH

Johansson, Bengt (författare): Lund University,Lunds universitet,Förbränningsprocesser KCFP,Annan verksamhet, LTH,Lunds Tekniska Högskola,Förbränningsmotorer,Institutionen för energivetenskaper,Institutioner vid LTH,The Competence Centre for Combustion Processes,Other operations, LTH,Faculty of Engineering, LTH,Combustion Engines,Department of Energy Sciences,Departments at LTH,Faculty of Engineering, LTH

(creator_code:org_t)

2012
2012
Engelska.
Ingår i: Proceedings of the 2012 American Control Conference. - 0743-1619 .- 2378-5861. - 9781457710957 - 9781457710964 ; , s. 4210-4214

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Abstract Ämnesord

Stäng

Engine efficiency is often controlled in an indirectway through combustion timing control. This requires a prioriknowledge of where to phase the combustion for differentoperating points and conditions. With cylinder individual efficiencyestimation, control strategies aiming directly at fuelconsumption optimization can be developed. It has previouslybeen shown that indicated efficiency can be estimated using thecylinder pressure trace. This paper presents a method to usethe estimated efficiency as a feedback variable in an extremumseeking control strategy for online steady state fuel consumptionoptimization. The experimental results show that the controllermanages to find the maximum brake torque region at the givenoperating point both with and without external excitation.

Engine efficiency is often controlled in an indirect way through combustion timing control. This requires a priori knowledge of where to phase the combustion for different operating points and conditions. With cylinder individual efficiency estimation, control strategies aiming directly at fuel consumption optimization can be developed. It has previously been shown that indicated efficiency can be estimated using the cylinder pressure trace. This paper presents a method to use the estimated efficiency as a feedback variable in an extremum seeking control strategy for online steady state fuel consumption optimization. The experimental results show that the controller manages to find the maximum brake torque region at the given operating point both with and without external excitation.

Av författaren/redakt...: Lewander, Magnus; Widd, Anders; Tunestål, Per; Johansson, Bengt

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