This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Effects of In - Cylinder Swirl on Part Load Performance and Combustion Characteristics in a S.I. Engine
Technical Paper
912468
Annotation ability available
Sector:
Event:
Language:
English
Abstract
The flow characteristics such as flow coefficient and swirl ratio in cylinder were measured at steady-state condition by using a steady-state flow measuring system which consists of an impulse swirl meter and a viscous flow air meter. Effects of the in-cylinder swirl on the emissions (NOx, THC), BSFC, MBT, and lean mixture limit (LML) were investigated by using single cylinder research engine with a helical intake port.
The combustion pressure in the cylinder was measured to analyze the combustion duration (such as the initial burn duration and the main burn duration) and COV of IMEP which have an effect on LML.
By generating the in-cylinder swirl, the combustion duration is remarkably decreased, while the emissions and BSFC are increased.
The lean mixture limit is increased with the in-cylinder swirl ratio. In the case of high swirl ratio (Rs=2.48),the lean mixture limit is increased by 3.3 with optimized fuel inject ion timing.
Authors
Citation
Han, B., Suh, J., and Kim, W., "Effects of In - Cylinder Swirl on Part Load Performance and Combustion Characteristics in a S.I. Engine," SAE Technical Paper 912468, 1991.Also In
References
- Matsushita S Inoue T. Nakanishi K. Kato K. Kobayashi N. “Development of the Toyota Lean Combustion System” SAE Paper 850044
- Quissek F. Bandel W. Mikulic L. A. “The AVL High Compression Lean Burn Engine - Engine Development and Passenger Car Application” SAE Paper 880575
- Chau E - L. Schipperijn F. W. Nagasaka R. Sawyer R - F. Iiyama A. “Effect of Intake Valve Configuration on lean Combustion” SAE Paper 880202
- Nagayama I Araki Y. Iioka Y. “Effects of Swirl and Squish on S.I. Engine Combustion and Emission” SAE Paper 770217
- Mikulec A Kent J. C. Tabaczynski R.J. “The Effect of Swirl on Combustion in a Pancake Chamber Spark Ignition Engine: The case of Constant Inducted Kinetic Energy” SAE Paper 880200
- Tippelmann G “A New Method of Investigation of Swirl Ports” SAE Paper 770404
- Partington G - D. “Analysis of Steady Flow Tests on Inlet and Exhaust Poets” Ricardo, DP.80/1123
- Spindt R - S. “Air-Fuel Ratios from Exhaust Gas Analysis” SAE Paper 650507 , SAE Trans. 74 1965
- Heywood J - B. Internal Combustion Engine Fundamentals Mcgraw-Hill Book 1988
- Lee D - U. Shim H. S. “Study of Gasoline Combustion Process by High Speed In-cylinder Gas Sampling ” Proceedings of the Fifth International Pacific Conference on Automotive Engineering 2 1989
- Iguchi S Kudo S. Furuno S. Kashiwagura T. Yasui T. “Study of Mixture Formation and Gas Motion in an Internal Combustion Engine Using Laser Sheet 2-D Visualization” SAE Paper 885078
- Yamamoto H. Misumi M. “Analysis of Cyclic Combustion Variation in a Lean Operating S.I.Engine” SAE Paper 870547
- Peters B. D. “Fuel Droplets inside the Cylinder of a spark Ignition Engine with Axial Stratification” SAE Paper 820132
- Quader A.A. “The Axially-Stratified-Charge Engine” SAE Paper 820131