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System Optimization for a 2-Stroke Diesel Engine with a Turbo Super Configuration Supporting Fuel Economy Improvement of Next Generation Engines
Technical Paper
2014-32-0011
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The objective of this paper is to present the results of the GT Power calibration with engine test results of the air loop system technology down selection described in the SAE Paper No. 2012-01-0831. Two specific boosting systems were identified as the preferred path forward: (1) Super-turbo with two speed Roots type supercharger, (2) Super-turbo with centrifugal mechanical compressor and CVT transmission both downstream a Fixed Geometry Turbine. The initial performance validation of the boosting hardware in the gas stand and the calibration of the GT Power model developed is described. The calibration leverages data coming from the tests on a 2 cylinder 2-stroke 0.73L diesel engine. The initial flow bench results suggested the need for a revision of the turbo matching due to the big gap in performance between predicted maps and real data. This activity was performed using Honeywell turbocharger solutions spacing from fixed geometry waste gate to variable nozzle turbo (VNT). New simulations results recommend VNT as it offers a higher potential to reduce BSFC with increase power and low end torque output than the original matching. For the high pressure stage the mechanical Roots type and the CVT superchargers have been assessed and the latter one has been identified having higher power adsorption than traditional positive displacement supercharger. This has allowed the supplier to work on an optimization of the units. Ultimately the VNT with CVT supercharger has been assessed on engine and it allowed confirming the validity and accuracy of the GT Power model after its calibration.
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Citation
Brynych, P., Macek, J., Tribotte, P., De Paola, G. et al., "System Optimization for a 2-Stroke Diesel Engine with a Turbo Super Configuration Supporting Fuel Economy Improvement of Next Generation Engines," SAE Technical Paper 2014-32-0011, 2014, https://doi.org/10.4271/2014-32-0011.Also In
References
- Heywood , J.B. Internal Combustion Engine Fundamentals McGraw-Hill London, England 1988 0-07-028637-X
- Pohorelsky , L. , Brynych , P. , Macek , J. , Vallaude , P. et al. Air System Conception for a Downsized Two-Stroke Diesel Engine SAE Technical Paper 2012-01-0831 2012 10.4271/2012-01-0831
- Brynych , P. - Macek , J. - Pohořelský , L. Air System Proposal and Testing for a Downsized Two-Stroke Diesel Engine Proceedings of the FISITA 2012 World Automotive Congress Beijing SAE-China FISITA 2012 1 289 314 978-3-642-33841-0
- Macek , J. , Pohořelský , L. Supercharger and Turbocharger Tests at CZ a.s. Strakonice ČVUT Praha 2010
- Bartelet P. , Morand N. , Chammas B. , Tuissant L. , Sausse L. , Riviere C. , Bouvier E. The new family of VNT™ turbocharger developed by Honeywell turbo technologies for Euro 6 an beyond Dresden supercharging conference 2013
- GT POWER User's manual and Tutorial GT-SuiteTM version 6.2 Gamma Technologies Inc. 2012
- Ciesla , C. , Keribar , R. , and Morel , T. Engine/Powertrain/Vehicle Modeling Tool Applicable to All Stages of the Design Process SAE Technical Paper 2000-01-0934 2000 10.4271/2000-01-0934
- Morel , T. , Keribar , R. , and Leonard , A. “Virtual Engine/Powertrain/Vehicle” Simulation Tool Solves Complex Interacting System Issues SAE Technical Paper 2003-01-0372 2003 10.4271/2003-01-0372