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A Study on the Mechanism of In-Cylinder Tumble Generation by Directed Intake Ports
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English
Abstract
The magnitudes and compositions of in-cylinder tumble ratio generated by each velocity components were computed at different intake valve lifts and distances along the direction of valve axis in this paper, based on the three-dimensional velocity data measured by hot-wire anemometry at intake valve periphery of typical SI engine intake ports (horizontal and sloping directed ports) in a steady flow rig. The effect of velocity profiles at above two intake ports exit on in-cylinder tumble generation was studied, and a microscopic analytical method of evaluating tumble-generating capability of intake ports was developed according to the velocity profiles at intake valve exit area.
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Authors
- Rui-Lin Liu - Engineering College of Transportation
- Chun-Run Zhang - Engineering College of Transportation
- Liang-Qin Wu - Engineering College of Transportation
- Xiang-Bi An - Engineering College of Transportation
- Yi-Kun Yu - Engineering College of Transportation
- Shu-Min Li - Engineering College of Transportation
- Ming-Zhi Feng - Tianjin Univ.
- Chong-Lin Song - Tianjin Univ.
Topic
Citation
Liu, R., Zhang, C., Wu, L., An, X. et al., "A Study on the Mechanism of In-Cylinder Tumble Generation by Directed Intake Ports," SAE Technical Paper 962089, 1996, https://doi.org/10.4271/962089.Also In
References
- Arcoumanis C. Whitelaw J.H. Fluid mechanics of Internal Combustion Engines: A Review Proc. I.Mech.E. 201 C1 1987
- Pinchon P. et al An Experimental and Computational Analysis of the Flow Field in a Four-Valve Spark Ignition Engine-Focus on Cycle Resolved Turbulence SAE paper 900006
- Omori S. et al Effect of Intake Port Flow Pattern on the In-cylinder Tumbling Air Flow in Multi-Valve SI Engine SAE paper 910477
- Ando H. et al Observations on the Effects of Intake-Generated Swirl and Tumble on Combustion COMODIA 90 1990
- Arcoumanis C. et al Steady Flow Characterization of Tumble-Generating Four-Valve Cylinder Heads Proc Instn Mech Engrs. 207 1993
- Belmont M.R. et al Tumble and Swirl: Are They a Mixed Blessing? Proc Inst Mech Engrs 208 1994
- Liu Ruilin et al An Investigation into Air Flow Characteristics through Inlet Valve of Directed Ports SAE paper 941753
- Liu Xunjun et al A Microscopic Analysis of In-Cylinder Swirl Generated by Directed Ports SAE paper 941754