Droplet Velocity/Size and Mixture Distribution in a Single-Cylinder Four-Valve Spark-Ignition Engine 981186
Laser Doppler velocimetry, phase Doppler anemometry and Mie scattering were applied to a single-cylinder, four-valve, spark-ignition gasoline research engine equipped with a fully transparent liner and piston, to obtain information about the tumble flow and the droplet size and velocity distributions during induction and compression, for lean air/fuel mixture ratios of 17.5 and 24 and with closed-valve and open-valve fuel injection. The mixture distribution obtained with the two injection strategies was correlated with flame images, pressure analysis and exhaust emissions which confirmed the advantages of combining open-valve injection with tumble to allow stable and efficient engine operation at an air/fuel ratio of 24 through charge stratification and faster flame growth.
Citation: Arcoumanis, C., Gold, M., Whitelaw, J., Xu, H. et al., "Droplet Velocity/Size and Mixture Distribution in a Single-Cylinder Four-Valve Spark-Ignition Engine," SAE Technical Paper 981186, 1998, https://doi.org/10.4271/981186. Download Citation
C. Arcoumanis, M. R. Gold, J. H. Whitelaw, H. M. Xu, J. E. Gaade, S. Wallace
Imperial College of Science, Technology and Medicine, Rover Group Ltd.
International Congress & Exposition
Analysis of Combustion and Flow Diagnostics-SP-1348, SAE 1998 Transactions - Journal of Engines-V107-3