This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Active Combustion Development Leveraging Injection Optimization with Exhaust Thermal Boost
Technical Paper
2020-01-0277
ISSN: 0148-7191, e-ISSN: 2688-3627
This content contains downloadable datasets
Annotation ability available
Sector:
Language:
English
Abstract
This IC engine improvement addresses ICE’s inherent efficiency limit through innovative mechanical design of a consolidated system encompassing intake bypass and coordinating injection mechanism. In principle, the exhaust energy is recuperated to modulate intake temperature, in the meantime, multi-staged injection control is proposed that enhances in-cylinder thermal efficiency. To be specific, a CFD-optimized bypass is constructed alongside the intake and injection design which utilizes multi-stage variable mixing precisely, taking full advantage of exhaust temperature elevation. Regenerative heat gained through exhaust system gives rise to flexible amount of thermal dynamics adjustment to the intake, which consequently delivers more robust combustion efficiency as well as lower emission metrics. A flow control valve is developed at intake interface enables modular variable intake routing supporting engine efficiency promotion. To improve power density and engine emissions, we develop a multiple injection strategy in accordance with boosted combustion characteristics. The strategy utilizes fuel air mixing thermodynamics to fulfill higher in-cylinder energy maximization where adequate fuel distribution is managed in the combustion chamber. Regarding ECU development, integrated valve, intake airflow, as well as injection control are designed to cooperate with each other under the supervisory control module, which determines weight coefficients related to relative component influence. Transient analysis of this combustion mode alongside with injection adjustment is implemented and compared with benchmark boosted engine performance. For intake port and injector, active valve timing is optimized showing substantial propelling effect of tackling trade-off between heat loss and entropy stimulation.
Recommended Content
Authors
Topic
Citation
Jia, X. and Ouyang, Q., "Active Combustion Development Leveraging Injection Optimization with Exhaust Thermal Boost," SAE Technical Paper 2020-01-0277, 2020, https://doi.org/10.4271/2020-01-0277.Data Sets - Support Documents
Title | Description | Download |
---|---|---|
Unnamed Dataset 1 | ||
Unnamed Dataset 2 |
Also In
References
- Hagos , F.Y. , Aziz , A.R.A. , and Sulaiman , S.A. Syngas (H2/CO) in a Spark-Ignition Direct Injection Engine. Part 1: Combustion, Performance and Emissions Comparison with CNG Int. J Hydrogen Energy 39 17884 17895 2014 10.1016/j.ijhydene.2014.08.141
- Poran , A. and Tartakovsky , L. Energy Efficiency of a Direct-Injection Internal Combustion Engine with High-Pressure Methanol Steam Reforming Energy 88 506 514 2015 10.1016/j.energy.2015.05.073
- Beatrice , C. , Avolio , G. , and Guido , C. Experimental Analysis of the Operating Parameter Influence on the application of Low Temperature Combustion in the Modern Diesel Engines SAE Technical Paper 2007-01-1839 2007 https://doi.org/10.4271/2007-01-1839
- Torregrosa , A.J. et al. Experiments on the Influence of Inlet Charge and Coolant Temperature on Performance and Emissions of a DI Diesel Engine Experimental Thermal and Fluid Science 30 7 633 2006 10.1016/j.expthermflusci.2006.01.002
- Iida , M. et al. The Effect of Intake Air Temperature, Compression Ratio and Coolant Temperature on the Start of Heat Release in an HCCI (Homogeneous Charge Compression Ignition) Engine SAE Technical Paper 2001-01-1880 2001 https://doi.org/10.4271/2001-01-1880
- Iverson , R.J. et al. The Effects of Intake Charge Preheating in a Gasoline-Fueled HCCI Engine SAE Technical Paper 2005-01-3742 2005 https://doi.org/10.4271/2005-01-3742
- Alain , M. , Tauzia , X. , and Hétet , J. Experimental Study of Various Effects of Exhaust Gas Recirculation (EGR) on Combustion and Emissions of an Automotive Direct Injection Diesel Engine Energy 33 1 22 34 2008 10.1016/j.energy.2007.08.010
- Kyritsis , D.C. and Rakopoulos , C.D. Parametric Study of the Availability Balance in an Internal Combustion Engine Cylinder SAE Technical Paper 2001-01-1263 2001 https://doi.org/10.4271/2001-01-1263
- Ghojel , J.I. Review of the Development and Applications of the Wiebe Function: A Tribute to the Contribution of Ivan Wiebe to Engine Research International Journal of Engine Research 11 4 297 312 August 2010 10.1243/14680874JER06510
- Heywood , J.B. Internal Combustion Engine Fundamentals New York McGraw Hill 1988
- Pischinger , F. Development Work on a Combustion System for Vehicle Diesel Engines FISITA Congress 1962
- Amsden , A.A. 1997
- Han , Z.Y. and Reitz , R.D. Turbulence Modeling of Internal Combustion Engines Using RNG j-e Models Combust Sci Technol 106 4-6 267 295 1995
- Han , Z.Y. and Reitz , R.D. A Temperature Wall Function Formulation for Variable Density Turbulence Flows with Application to Engines Convective Heat Transfer Modeling Int J Heat Mass Transfer 40 3 613 625 1997
- Vignaud , A. , Gastaldi , P. , and Hardy , J.P. Last Developments of Low Temperature Combustion ATA Engine Conference Siracusa October 18-20, 2006