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Valve Train Dynamic Analysis and Validation
Technical Paper
2004-01-1457
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
In order to reduce engine development timing and cost, a numerical calculation has been developed by Toyota Motor Company and Toyota Technical Center to evaluate valve train systems. The goal is to predict valve_bounce speed, valve displacement, hydraulic lash adjuster motion and strain in the rocker arm. The numerical procedure combines finite element model and multi-body dynamic analysis.
Normally, strain calculation is a two-step process. In the first step, engineers obtain the excitation from the dynamic analysis. In the second step, engineers use the forcing function from dynamic analysis to calculate strain and stress. The new approach in this paper, using ADAMS, calculates dynamic load and recover strain simultaneously. As the flexibility of the moving part (for example rocker arm) is taken into account in the equations of motion, ADAMS will calculate the modal strain. Based on the modal strain, the strain or stress at any given node(s) can be recovered. Figure 1 shows the calculation process. The dynamic strain described in this paper has been fully validated by measurement.
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Lin, Y., Ramachandra, P., Tanaka, Y., Tawata, K. et al., "Valve Train Dynamic Analysis and Validation," SAE Technical Paper 2004-01-1457, 2004, https://doi.org/10.4271/2004-01-1457.Also In
References
- Du H.Y.Isaac Chen Jia-Shiun “Dynamic Analysis of a 3D Finger Follower Valve Train System Coupled with Flexible Camshafts” SAE 2001-01-1503
- Ortmann Christoph “Mechanical Simulation in the Engine Development Process: Part II - Coupled Analysis of Engine Subsystems” ADAMS User Conference Europe 2001
- Merritt H. “Hydraulic Control Systems” John Wiley & Sons
- Ross J. Meyer J. “Simulation the Dynamic Behavior of Chain Drive Systems By Advanced CAE Programs” SAE 960298
- Johnson K. L. “Contact Mechanics” Cambridge University Press