This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Intake and Exhaust Ports Design for Tumble and Mass Flow Rate Improvements in Gasoline Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published April 02, 2019 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
In recent years, world-wide automotive manufacturers have been continuously working in the research of suitable technical solutions to meet upcoming stringent carbon dioxide (CO2) emission targets, as defined by international regulatory authorities. Many technologies have been already developed, or are currently under study, to meet legislated targets.
In-line with above objective, the enhancement of turbulence intensity inside the combustion chamber has a significant importance which contributes to accelerating the burning rate, to increase the thermal efficiency and to reduce the cyclic variability . Turbulence generation is mainly achieved during the intake stroke which is strictly affected by the intake port geometry, orientation and to certain extends by combustion chamber masking. Conservation of turbulence intensity till 700~720 crank angle (CA) is achieved by optimized shape of combustion chamber geometry and piston bowl shape. High exhaust port flow also contributes to overall engine efficiency by reduction of residual gas fraction (RGF); this enables high compression ratio (CR) operation by reducing in compression end temperature (CET).
In this work, different geometries of the intake port have been designed and analyzed by means of three dimensional (3D) computational fluid dynamics (CFD) simulations, to foresee the in-cylinder tumble motion development during intake stroke. Final design is manufactured and tested on flow bench. 45% tumble improvement has been attained over base design without loss of mass flow rate (MFR). Similarly exhaust port has also been re-designed by performing numbers of iterations to enhance exhaust port flow and velocity by steady state CFD iterations. Similar to intake port, actual flow measurement is also performed on exhaust port and 36% increase in MFR performance is gained.
CitationSingh, A., Poonia, S., Jalan, A., Singh, J. et al., "Intake and Exhaust Ports Design for Tumble and Mass Flow Rate Improvements in Gasoline Engine," SAE Technical Paper 2019-01-0763, 2019, https://doi.org/10.4271/2019-01-0763.
Data Sets - Support Documents
|Unnamed Dataset 1|
|Unnamed Dataset 2|
|Unnamed Dataset 3|
- Cameretti , M. , De Bellis , V. , Romagnuolo , L. , Iorio , A. et al. 3D CFD Analyses of Intake Duct Geometry Impact on Tumble Motion and Turbulence Production in SI Engines SAE Technical Paper 2017-01-2199 2017 10.4271/2017-01-2199
- Tang , Y. , Deng , W. , Liu , B. , Hu , T.G. et al. The New Changan Inline 4 Cylinder 1.6 L Gasoline Naturally Aspirated GDI Engine SAE Technical Paper 2018-01-1129 2018 10.4271/2018-01-1129
- Adomeit , P. , Hopp , M. , Schmidt , A. , Lang , O. et al. CAE-Based Port Development and Flow Design for SI Engines SAE Technical Paper 2005-01-0243 2005 10.4271/2005-01-0243
- Sutar , P. , Dsouza , A. , Sonawane , S. , Rairikar , S. et al. Study of In-Cylinder Tumble Effect on Spark Ignition Direct Injection (SI-DI) Engine Performance Using Gasoline, CNG & E85 Fuels and Simulation Technique SAE Technical Paper 2017-26-0076 2017 10.4271/2017-26-0076
- Hoag , K. and Megel , A. Methodology Development for Tumble Port Evaluation SAE Technical Paper 2016-01-0636 2016 10.4271/2016-01-0636
- Gaikwad , S. and Arora , K. Steady and Transient CFD Approach for Port Optimization SAE Technical Paper 2008-01-1430 2008 10.4271/2008-01-1430
- Son , J.-W. , Lee , S. , Han , B. , and Kim , W. A Correlation Between Re-Defined Design Parameters and Flow Coefficients of SI Engine Intake Ports SAE Technical Paper 2004-01-0998 2004 10.4271/2004-01-0998
- Kobayashi , T. and Arase , K. Intake System Optimization by Intake Loss Coefficient Method SAE Technical Paper 1999-01-3337 1990 10.4271/1999-01-3337
- Ye , Y. , Xu , L. , Wang , J. , Yao , K. et al. Development of a New 1.8L Down-Speeding Turbocharged Gasoline Engine with Miller Cycle SAE Technical Paper 2018-01-1712 2018 10.4271/2018-01-1712
- Kim , Y. , Kim , M. , Kim , J. , Song , H.H. et al. Predicting the Influences of Intake Port Geometry on the Tumble Generation and Turbulence Characteristics by Zero-Dimensional Spark Ignition Engine Model SAE Technical Paper 2018-01-1660 2018 10.4271/2018-01-1660
- Tschöke , H. , Naumann , B. , and Hartkopf , L. Measurement and Simulation of Intake Port and In-Cylinder Air Flow of Diesel and Gasoline Engines SAE Technical Paper 2005-24-072 2005 10.4271/2005-24-072
- Tokuda , S. , Kubota , M. , and Noguchi , Y. Development of CFD Shape Optimization Technology using the Adjoint Method and Its Application to Engine Intake Port Design SAE Technical Paper 2013-01-0969 2013 10.4271/2013-01-0969
- Pinnapedda , B. and Gokhale , A. Improvement of Performance of Single Cylinder Motorcycle Engine by Optimizing the Port Flow Coefficients Through Integrated 1D/3D-CFD Analysis SAE Technical Paper 2012-32-0055 2012 10.4271/2012-32-0055
- Laimboeck , F.J. and Glanz , R. AVL Approach for Small 4-Stroke Cylinderhead-, Port- and Combustion Chamber Layout SAE Technical Paper 1999-01-3344 1999 10.4271/1999-01-3344
- Abidin , Z. , Hoag , K. , Mckee , D. , and Badain , N. Port Design for Charge Motion Improvement within the Cylinder SAE Technical Paper 2016-01-0600 2016 10.4271/2016-01-0600
- Ogink , R. and Babajimopoulos , A. Investigating the Limits of Charge Motion and Combustion Duration in a High-Tumble Spark-Ignited Direct-Injection Engine SAE Int. J. Engines 9 4 2129 2141 2016 10.4271/2016-01-2245
- Jocsak , J. , White , D. , Armand , C. , and Davis , R. Development of the Combustion System for General Motors’ High-Efficiency Range Extender Ecotec Small Gas Engine SAE Int. J. Engines 8 4 1587 1601 2015 10.4271/2015-01-1272