This content is not included in your SAE MOBILUS subscription, or you are not logged in.
The Effects of Squish Motion on the Burn-Rate and Performance of a Spark-Ignition Engine
ISSN: 0148-7191, e-ISSN: 2688-3627
Published August 01, 1990 by SAE International in United States
Annotation ability available
An experimental investigation of the effects of squish motion on turbulence generation, burn-rate and engine performance has been undertaken in a Ricardo Hydra single-cylinder research engine. An experimental combustion chamber design incorporating a number of squish generated jets was used to enhance the turbulent motion in the chamber during combustion. Flow-field measurements were made with a hot-wire anemometer in order to characterize the turbulence field. Measurements of brake thermal efficiency and mass burn-rate showed that enhanced turbulence generated by combustion chamber geometry is effective in improving performance under lean operating conditions. A single squish generated jet motion directed towards the spark plug resulted in the highest thermal efficiency during high speed lean operation, while burn-rate analysis indicated that squish action was most effective during the main burn period.
CitationEvans, R. and Tippett, E., "The Effects of Squish Motion on the Burn-Rate and Performance of a Spark-Ignition Engine," SAE Technical Paper 901533, 1990, https://doi.org/10.4271/901533.
- Young, M.B., “Cyclic Dispersion in the Homogeneous Charge Spark Ignition Engine -- A Literature Study”, SAE Paper 810020, 1981.
- Nagayana, I., Araki, Y., and Lioka, Y., “Effects of Swirl and Squish on SI Engine Combustion and Emissions”, SAE Paper 770217, 1977.
- Nakamura, H., Ohinouye, T., et al., “Development of a New Combustion System (MCA Jet) in Gasoline Engine”, SAE Paper 790016, 1979.
- Evans, R.L., “Internal Combustion Engine Squish Jet Combustion Chamber”, U.S. Patent No. 4,572,123, 1986.
- Evans, R.L. and Cameron, C., “A New Combustion Chamber for Fast Burn Applications”, SAE Paper 860319, 1986.
- Dymala-Dolesky, R., “The Effects of Turbulence Enhance ment on the Performance of a Spark-Ignition Engine”, M.A.Sc. thesis, UBC, 1986.
- Witze, P.O., “A Critical Comparison of Hot-Wire Anemometry and Laser Doppler Velocimetry for IC Engine Applications”, SAE Paper 800132, 1980.
- Catania, A.E., and Mittica, A., “A Contribution to the Definition and Measurement of Turbulence in a Reciprocating IC Engine”, ASME Paper 85DPG12, 1985.
- Tippett, E.C., “The Effects of Combustion Chamber Design on Turbulence, Cyclic Variation and Performance in an SI Engine”, M.A.Sc. thesis, U.B.C., 1989.
- Rassweiler, C.M. and Withrow, L., “Motion Pictures of Engine Flames Correlated with Pressure Cards”, SAE Transactions, vol. 42, No. 5, 1938.
- Amann, C.A., “Cylinder Pressure Measurement and its Use in Engine Research”, SAE Paper 852067, 1985.