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Prediction of Tumble Speed in the Cylinder of the 4-Valve Spark Ignition Engines
Technical Paper
2000-01-0247
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Event:
SAE 2000 World Congress
Language:
English
Abstract
The prediction of tumble speed in the cylinder of spark ignition engines is discussed in this paper. Based on the experimental results from the steady state flow rig and the flow field measurement in the cylinder of a motored engine by LDA system, a model for the physical process of the tumble formation is proposed. That is: during the early stage of induction and before the piston reaching a critical crank angle, tumble can't be formed effectively. This critical piston position or crank angle should correspond to the time when the in-cylinder tumble has to be distorted and destroyed by the upward moving piston during the late stage of compression stroke. A model for predicting the tumble speed is derived and verified by the in-cylinder flow measurement results by a LDA system.
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Authors
Citation
Shuliang, L., Yufeng, L., and Ming, L., "Prediction of Tumble Speed in the Cylinder of the 4-Valve Spark Ignition Engines," SAE Technical Paper 2000-01-0247, 2000, https://doi.org/10.4271/2000-01-0247.Also In
Combustion, Flow Diagnostics, and In-Cylinder Velocity Measurement
Number: SP-1529; Published: 2000-03-06
Number: SP-1529; Published: 2000-03-06
References
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- Shuliang Liu Ming Lu Prediction of Tumble Speed in the Cylinder of Spark Ignition Engines Transaction of CSICE 1998 2
- Shuliang Liu Feizhou Song Investigation of the steady flow test rig and inlet port for in-cylinder tumbling air movement in gasoline engine “Internal Combustion Engine Engineering” 1995 1