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Transient Torque Converter Performance, Testing, Simulation and Reverse Engineering
Technical Paper
2003-01-0249
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
The objective of this project was to investigate the transient performance of a three-element torque converter used in automotive applications. The investigation was conducted by running lab tests as well as numerical simulations. Lab tests subjected various torque converters to transient conditions similar to that seen in automotive applications. Numerical simulations were focused on solving a set of nonlinear differential equations that result from application of energy and momentum conservation laws.
A computer model was created that successfully predicts the transient behavior of the torque converter. Validation of the computer model was accomplished by comparing simulation results to test data for three separate torque converters. Excellent agreement between test and simulation was seen across the range of data.
Out of a need for various design parameters required in the transient model, a technique to reverse engineer the torque converter was developed. Additionally, a computer routine has been created that allows efficient study of a torque converter from a design perspective.
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Citation
Pohl, B., "Transient Torque Converter Performance, Testing, Simulation and Reverse Engineering," SAE Technical Paper 2003-01-0249, 2003, https://doi.org/10.4271/2003-01-0249.Also In
SAE 2003 Transactions Journal of Passenger Cars - Mechanical Systems
Number: V112-6; Published: 2004-09-15
Number: V112-6; Published: 2004-09-15
References
- Fujita, K. Seiichi, I. “Transient Characteristics of Torque Converter-Its Effect on Acceleration Performance of Auto-Trans. Equipped Vehicles” SAE 900554
- Hrovat, D. Tobler, W. E. “Bond Graph Modeling and Computer Simulation of Automotive Torque Converters” Journal of the Franklin Institute Pergamon Press Ltd. 1985
- Ishihara, T. Emori, R. I. “Torque Converter as a Vibration Damper and Its Transient Characteristics” SAE 660368
- Jandasek, V. J. “The Design of a Single - Stage Three Element Torque Converter” SAE Design Practices - Passenger Car Automatic Transmissions AE-18 1-50961-506-4 1994