Imperial College London
Alternate

ProfessorRicardoMartinez-Botas

Faculty of Engineering, Department of Mechanical Engineering

Associate Dean Industry Partnerships,Prof of Turbomachinery
 
 
 
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Contact

 

+44 (0)20 7594 7241r.botas Website

 
 
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Location

 

611City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@inproceedings{Chiong:2019:10.4271/2019-01-0327,
author = {Chiong, MS and Abas, MA and Tan, FX and Rajoo, S and Martinez-Botas, R and Fujita, Y and Yokoyama, T and Ibaraki, S and Ebisu, M},
doi = {10.4271/2019-01-0327},
title = {Steady-state, transient and wltc drive-cycle experimental performance comparison between single-scroll and twin-scroll turbocharger turbine},
url = {http://dx.doi.org/10.4271/2019-01-0327},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - CPAPER
AB  - The use of twin-scroll turbocharger turbine in automotive powertrain has been known for providing better transient performance over conventional single-scroll turbine. This has been accredited to the preservation of exhaust flow energy in the twin-scroll volute. In the current study, the performance comparison between a single and twin-scroll turbine has been made experimentally on a 1.5L passenger car gasoline engine. The uniqueness of the current study is that nearly identical engine hardware has been used for both the single and twin-scroll turbine volutes. This includes the intake and exhaust manifold geometry, turbocharger compressor, turbine rotor and volute scroll A/R variation trend over circumferential location. On top of that, the steady-state engine performance with both the volutes, has also been tuned to have matching brake torque. Such highly comparable setup enabled a more precise evaluation on the effect of pulse-isolation in the twin-scroll turbine volute during transient process. The steady-state performance comparison shows the amplitude of exhaust pulse in the twin-scroll volute is substantially higher than in the single-scroll volute, hence confirming the preservation of pulse exhaust energy. As a result, twin-scroll volute is found to be able to accelerate the engine boost pressure at a faster rate, therefore results in better transient response. The ultimate advantage of the twin-scroll turbine is further exemplified via engine Worldwide harmonized Light vehicles Test Cycle (WLTC) testing, where approximately 2.7% of averaged reduction in fuel consumption has been recorded. Majority of this improvement has been contributed by low to medium speed driving condition.
AU  - Chiong,MS
AU  - Abas,MA
AU  - Tan,FX
AU  - Rajoo,S
AU  - Martinez-Botas,R
AU  - Fujita,Y
AU  - Yokoyama,T
AU  - Ibaraki,S
AU  - Ebisu,M
DO  - 10.4271/2019-01-0327
PY  - 2019///
TI  - Steady-state, transient and wltc drive-cycle experimental performance comparison between single-scroll and twin-scroll turbocharger turbine
UR  - http://dx.doi.org/10.4271/2019-01-0327
ER  -
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