Comparison of Measured and Predicted Skirt Liner Clearances in a Gasoline Engine 972879
Using skirt-liner clearance and cylinder pressure measurements provided by Isuzu Motors, Ltd. of a production type gasoline automotive engine, a validation study was done of Ricardo's PISDYN code, which predicts the secondary motions and skirt liner elastohydrodynamic lubrication of pistons. Predictions using the computer code of the skirt liner clearance at two locations on the skirt were compared with measured results. Using the code, parametric studies were done.
Very good qualitative and quantitative agreement was found for the baseline cases. In the parametric studies using the code only, the following were found: The predicted clearances were very sensitive to variation in cold minimum clearance. The effect of cylinder induced pressure deformation was significant, especially near the point of peak cylinder pressure. Increasing the cylinder pressure increased the peak clearances. Changing the asperity roughness height affected the clearances near a point of asperity contact only. The clearances showed small sensitivity to changes in temperature.
Citation: Perchanok, M., Yamamoto, A., and Tanaka, O., "Comparison of Measured and Predicted Skirt Liner Clearances in a Gasoline Engine," SAE Technical Paper 972879, 1997, https://doi.org/10.4271/972879. Download Citation
Author(s):
Mathias Perchanok, A. Yamamoto, O. Tanaka
Affiliated:
Isuzu Motors Ltd.
Pages: 12
Event:
International Fuels & Lubricants Meeting & Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Diesel and SI Engine Modeling-SP-1306
Related Topics:
Engine cylinders
Pistons
Pressure
Gasoline
Production
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