This content is not included in your SAE MOBILUS subscription, or you are not logged in.
The Effect of Intake Valve Angle on In-cylinder Flow during Intake and Compression Process
Technical Paper
2007-01-4045
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Valve angle defined as the angle between a valve axis and a cylinder axis is one of the most important design factors that may have an influence on valve train design, cylinder head size, in-cylinder flow, etc. In particular, since valve angle cannot be altered during the development process once basic engine specification is determined at the initial concept design stage, the decision of a valve angle is an important process and the determined valve angle imposes restriction on the potential of the gasoline engine performance.
In this study the effect of the valve angle on in-cylinder flows has been experimentally investigated using a PIV (Particle Image Velocimetry) technique. In-cylinder flows of two test engines that have different valve angles have been measured at four different horizontal and three different vertical planes during intake and compression processes. During the intake process, the result shows that the intake flow of the conventional engine in horizontal plane is more complicated than that of narrow angle engine and the flow in vertical plane is rapidly decayed at the end stage of intake process. The flow pattern of the narrow angle engine is well arranged in horizontal plane and the vertical component of the flow remains so high that forms large scale strong tumble flow. During the compression process, the flow pattern is well arranged compared with intake flows and basic tumble flow structures are maintained until the end of the compression stage regardless of the valve angle.
Recommended Content
Authors
Citation
Kim, M. and Ohm, I., "The Effect of Intake Valve Angle on In-cylinder Flow during Intake and Compression Process," SAE Technical Paper 2007-01-4045, 2007, https://doi.org/10.4271/2007-01-4045.Also In
References
- Church, W., Farrell, P.V. (1998). Effects of Intake Port Geometry on Large Scale In-Cylinder Flows, SAE Paper, 98484.
- Patrie, M.P., Martin, J.K., Engman, T.J. (1998). Inlet Port Geometry and Flame Position, Flame Stability, and Emissions in an SI Homogeneous Charge Engine, SAE Paper, 982056
- Fontana, G., Galloni, E., Jannelli, E., Palmaccio, R. (2003). Influence of the Intake System Design on a Small Spark-Ignition Engine Performance: A Theoretical Analysis, SAE Paper, 2003-01-3134
- Lee, D., Heywood, J.B. (2006). Effects of Charge Motion Control during Cold Start of SI Engines, SAE Paper, 2006-01-3399
- Kim, T., Noh, S., Yu, C., Kang, I., (1994). Optimization of Swirl and Tumble in KMC 2.4L Lean Burn Engine, SAE Paper, 940307
- Lienemann, H., Shirmpton, J.S., (2003). In-Cylinder Tumble Flow Characteristics and Implication for Fuel/Air Mixing in Direct Injection Gasoline Engine, SAE Paper, 2003-01-3104
- Christensen, M., Johansson, B., (2002). The effect of In-Cylinder Flow and Turbulence on HCCI Operation, SAE Paper, 2002-01-2864
- Aleiferis, P., Charalambides, A.G., Hardalupas, Y., Urata, Y. (2005). Modeling and Experiments of HCCI Engine Combustion with Charge Stratification and Internal EGR, SAE Paper, 2005-01-3725
- Mattarelli, E., Borghi, M., Fontanesi, S., Montarsi, L., (2004). The Influence of Swirl Control Strategies on the Intake Flow in Four Valve HSDI Diesel Engine, SAE Paper, 2004-01-0112
- Reitz, R., Corgard, D. (2001). Effects of Alternative Fuels and Intake Port Geometry on HSDI Diesel Engine Performance and Emissions, SAE Paper, 2001-01-0647
- Son, J.W., Lee, S., Han, B., Kim, W. (2004). A Correlation Between Re-Defined Design Parameters and Flow Coefficients of SI Engine Intake Ports, SAE Paper, 2004-01-0998