Using Bezier-Splines for Design Optimization of CAMS Regarding Valve Train Dynamics-Reference-Cited by-同舟云学术

Using Bezier-Splines for Design Optimization of CAMS Regarding Valve Train Dynamics

Published:2005-01-01 Issue: Volume: Page:
ISSN:
Container-title:Design Engineering, Parts A and B
language:
Short-container-title:

Author:

Scheucher R.¹,Hellinger W.²

Affiliation:

1. Industrial Mathematics Competence Center

2. AVL List GmbH

Abstract

The aim of this work is the improvement of the cam design for automotive valve trains. A constrained optimization problem is defined, using the control points of the cam profile, which is represented by harmonic splines, as design variables. Additionally to the optimization problem the advantages of the calculation of sensitivity information using direct or adjoint methods are determined. The valve train model is defined by a multi body system containing discontinuities due to the loss of contact between two consecutive components of the valve train. The objective function is to maximize the area below the valve lift, which has a great influence on the gas flow. Constraints for dynamic force, the valve opening and closing phase and the valve lift based on the engine’s thermodynamics considerations are taken into account. Furthermore some constraints for the geometric coordinates of the control points of the cam profile must be imposed.

Publisher

ASMEDC

Link

http://asmedigitalcollection.asme.org/IMECE/proceedings-pdf/doi/10.1115/IMECE2005-79865/4717324/881_1.pdf

Reference19 articles.

1. Norton, R. L., 2002, Cam Design and Manufacturing Handbook, Industrial Press, NY.

2. Hellinger, W., Priebsch, H. H., Landfahrer, H. H., Mayerhofer, U, 1992, “Valve Train Dynamics and its contribution to Engine Performance,” FISITA’92 Congress, London.

3. Rivola A., Carlini A., Dalpiaz G., 2002, “Modelling the Elastodynamic Behaviour of a Desmotronic Valve Train,” Proceedings of ISMA2002 International Conference on Noise & Vibration Engineering 16–18 Sept. 2002, Leuven, Belgium.

4. Tolsma J. E. , BartonP., 2002, “Hidden Discontinuities and Parametric Sensitivity Calculations,” SIAM Journal Scientific Computation, 23, 6, 1862–1875.

5. Sopouch, M., Hellinger, W., Priebsch, H. H., 2003, “Prediction of Vibro-Acoustic Excitation due to Timing Chains of Reciprocating Engines,” Journal of Multi-Body Dynamics, Proceedings IMECHE, 215.