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Diesel Engine Valve Spring - A Design Optimisation
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Sector:
Event:
SAE Brasil '94
Language:
English
Abstract
This paper presents an study to improve the design of a valve spring for diesel engines. In order to get a guide line for design optimisation, as well as providing the better understanding of the mechanism, a dynamic model is first analysed. After considering the valve spring as a linear mechanical system, loads and dynamic stresses are hereby analysed. The study will be focusing natural frequencies and resonance condictions of the springs. Supporting the fatigue analysis a finite element study is performed using the NASTRAN 67 code and the I DEAS VI solid modeller.
As a final result a single spring design is proposed to substitute the double spring concept. Eletronic devices used in test bench to cheek single spring ability of controlling the value train at high speed are also presented. It is also hereby presented validation procedures and test results to verify the theoretical predictions.
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Authors
Citation
Salamani, J. and Cardoso, L., "Diesel Engine Valve Spring - A Design Optimisation," SAE Technical Paper 942398, 1994, https://doi.org/10.4271/942398.Also In
References
- Valve train dynamics - A computer Study Seidlitz Stive SAE Paper 890620
- An Efficient Model for Valvetrain and Spring Dynamics PHilip P.J. Schamel A.R. Ford Werke AG. SAE paper 890619
- Perkins Engines - Perkins Material Standard
- Perkins Engines - Engineering Test Procedure
- Deutsch Institut für Normen
- Associação Brasileira de Normas Técnicas
- Deutsch Institut für Normen
- Technical Report lochpe-Maxion - Product Engineering C.A.E. Report
- Cardoso, Leandro Guimarães para anãlise de vãlvulas em motores alternativos 1993
- SAE Handbook - J1121 SAE Recommended Practice
- MSC Handbook for Linear Analysis
- MSC Handbook for Dynamics Analysis
- SDRC Finit Element Modeling - I-DEAS VI
- Valve train design developments Adams D.R. T&N Technology Ltd.