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Valve Train Dynamics-A Computer Study
ISSN: 0148-7191, e-ISSN: 2688-3627
Published February 01, 1989 by SAE International in United States
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A computer model was developed to study the dynamic behavior of a pushrod/hydraulic tappet configured valve train. For accurate simulation, the model had 21 degrees of freedom, nine of which were used to model the valve spring. The model's damping values, and the stiffness of the hydraulic tappet, were empirically derived by correlating the model with experimental data. To achieve excellent correlation, two of the model's dampers had to be non-linear. This study did not include the impact of cylinder pressure.
The computer model was used to study component loads and stresses over a broad engine speed range. The valve train was found to behave as a linear mechanical system with two significant modes of vibration. The harmful consequences of strongly exciting these resonant modes is covered, as well as ways to minimise these resonant responses.
|Technical Paper||A Comprehensive Simulation of High Speed Driven Valve Trains|
|Technical Paper||An Efficient Model for Valvetrain and Spring Dynamics|
|Technical Paper||An Optimization Approach to Valve Train Design|
CitationSeidlitz, S., "Valve Train Dynamics-A Computer Study," SAE Technical Paper 890620, 1989, https://doi.org/10.4271/890620.
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