This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Valvetrain Response Prediction Using Advanced Continuous Simulation Language
ISSN: 0148-7191, e-ISSN: 2688-3627
Published December 01, 1996 by SAE International in United States
Annotation ability available
The response of an overhead cam valvetrain system has been accurately simulated using the Advanced Continuous Simulation Language (ACSL). This approach is unique by using a software program to solve the system equations while others have derived codes to perform these calculations. Simulation variables include cam lift velocity function, valve spring stiffnesses and damping coefficients, stiffnesses of other valvetrain components, and cam speed. Simulated results closely agree with actual valvetrain test data. Natural frequencies obtained from the valvetrain simulation match those predicted by spring design theory and finite element analysis. Since the cam lift function and other components' properties are easily modified, this computer simulation simplifies the task of designing valvetrain systems by providing meaningful and reliable system response predictions quickly.
CitationMergen, H. and Harralson, J., "Valvetrain Response Prediction Using Advanced Continuous Simulation Language," SAE Technical Paper 962512, 1996, https://doi.org/10.4271/962512.
- Freudenstein, F. Hanachi, S. “The Development of a Predictive Model for the Optimization of High-Speed Cam-Follower Systems with Coulomb Damping Internal Friction and Elastic and Fluidic Elements,” Transactions of the ASME Journal of Mechanisms, Transmissions, and Automation in Design December 1986 108
- Seidlitz, S. “Valve Train Dynamics - A Computer Study,” SAE Technical Paper # 890620 March 1989
- Meyer, J. Phlips, P.J. Schamel, A.R. “An Efficient Model for Valvetrain and Spring Dynamics,” SAE Technical Paper # 890619 March 1989
- David, J.W. Kim, D. “A Combined Model for High Speed Valve Train Dynamics (Partly Linear and Partly Nonlinear),” SAE Technical Paper # 901726 September 1990
- Paranjpe, R.S. “Dynamic Analysis of a Valve Spring With a Coulomb-Friction Damper,” Journal of Mechanical Design December 1990 112
- Hammacher, J. Schamel, A.R. Utsch, D. “Modeling and Measurement Techniques for Valve Spring Dynamics in High Revving Internal Combustion Engines,” SAE Technical Paper # 930615 March 1993
- Wahl, A.M. Mechanical Springs McGraw-Hill Book Company, Inc. New York 2nd 1963