Details
| Original language | English |
|---|---|
| Journal | SAE Technical Papers |
| Publication status | Published - 2011 |
| Event | SAE 2011 World Congress and Exhibition - Detroit, MI, United States Duration: 12 Apr 2011 → 14 Apr 2011 |
Abstract
The supercharging of small-displacement gasoline engines requires high pressure ratios combined with a wide range of air flow rate. To resolve this conflict, two-stage turbo charging with two turbochargers or the combination of a turbocharger and a mechanical compressor is used. But this is associated with an increase in complexity. The highest potential for avoiding a multi-stage system is provided by the systematic modification of the turbo-machinery operating maps, e.g. on the turbine side by using variable turbine geometry. An additional promising approach is the implementation on the compressor side of a variable guide vane. The shape of the compressor map is directly affected and the requirements for highly boosted engines can thus be fulfilled. The present paper provides an assessment of the potential of a variable compressor in combination with a variable geometry turbine (VTG) and additional wastegate on a small-volume gasoline engine. To generate the new compressor maps with different vane positions, a detailed model is developed, which includes several detailed models of earlier publications. The modification of the flow field of the compressor leads to a change in the forces on the rotor assembly. To take account of increased bearing loads another simulation model is developed that allows a detailed analysis of the lubricating film properties occurring. The variable maps are integrated into a 1-D engine simulation model to estimate the potential of this system for higher low-end-torque.
ASJC Scopus subject areas
- Engineering(all)
- Automotive Engineering
- Engineering(all)
- Safety, Risk, Reliability and Quality
- Environmental Science(all)
- Pollution
- Engineering(all)
- Industrial and Manufacturing Engineering
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In: SAE Technical Papers, 2011.
Research output: Contribution to journal › Conference article › Research › peer review
}
TY - JOUR
T1 - The potential of variable compressor geometry for highly boosted gasoline engines
AU - Herbst, Fabian
AU - Stöber-Schmidt, Claude Pascal
AU - Eilts, Peter
AU - Sextro, Thorsten
AU - Kammeyer, Jasper
AU - Natkaniec, Christoph
AU - Seume, Joerg
AU - Porzig, Daniel
AU - Schwarze, Hubert
PY - 2011
Y1 - 2011
N2 - The supercharging of small-displacement gasoline engines requires high pressure ratios combined with a wide range of air flow rate. To resolve this conflict, two-stage turbo charging with two turbochargers or the combination of a turbocharger and a mechanical compressor is used. But this is associated with an increase in complexity. The highest potential for avoiding a multi-stage system is provided by the systematic modification of the turbo-machinery operating maps, e.g. on the turbine side by using variable turbine geometry. An additional promising approach is the implementation on the compressor side of a variable guide vane. The shape of the compressor map is directly affected and the requirements for highly boosted engines can thus be fulfilled. The present paper provides an assessment of the potential of a variable compressor in combination with a variable geometry turbine (VTG) and additional wastegate on a small-volume gasoline engine. To generate the new compressor maps with different vane positions, a detailed model is developed, which includes several detailed models of earlier publications. The modification of the flow field of the compressor leads to a change in the forces on the rotor assembly. To take account of increased bearing loads another simulation model is developed that allows a detailed analysis of the lubricating film properties occurring. The variable maps are integrated into a 1-D engine simulation model to estimate the potential of this system for higher low-end-torque.
AB - The supercharging of small-displacement gasoline engines requires high pressure ratios combined with a wide range of air flow rate. To resolve this conflict, two-stage turbo charging with two turbochargers or the combination of a turbocharger and a mechanical compressor is used. But this is associated with an increase in complexity. The highest potential for avoiding a multi-stage system is provided by the systematic modification of the turbo-machinery operating maps, e.g. on the turbine side by using variable turbine geometry. An additional promising approach is the implementation on the compressor side of a variable guide vane. The shape of the compressor map is directly affected and the requirements for highly boosted engines can thus be fulfilled. The present paper provides an assessment of the potential of a variable compressor in combination with a variable geometry turbine (VTG) and additional wastegate on a small-volume gasoline engine. To generate the new compressor maps with different vane positions, a detailed model is developed, which includes several detailed models of earlier publications. The modification of the flow field of the compressor leads to a change in the forces on the rotor assembly. To take account of increased bearing loads another simulation model is developed that allows a detailed analysis of the lubricating film properties occurring. The variable maps are integrated into a 1-D engine simulation model to estimate the potential of this system for higher low-end-torque.
UR - http://www.scopus.com/inward/record.url?scp=85072503068&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85072503068
JO - SAE Technical Papers
JF - SAE Technical Papers
SN - 0148-7191
T2 - SAE 2011 World Congress and Exhibition
Y2 - 12 April 2011 through 14 April 2011
ER -