This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Local Optimization of Parametrized Cam Profiles Applied to the Dynamic of Valvetrains
Technical Paper
2014-36-0231
ISSN: 0148-7191, e-ISSN: 2688-3627
Annotation ability available
Sector:
Language:
English
Abstract
Over the years, internal combustion engines have been researched and improved in the search for more power and for lower fuel consumption. An automotive subsystem that directly affects the performance of the engine is the valve train system. This system allows for the control of the admittance and release of gases from the combustion chamber. This system operates in all phases, ensuring that the valves open and close properly and ensuring the sealing of the cylinder. Several researchers have studied the kinematics and dynamics of the valve actuation system to improve engine performance. As the actuation of the valves occurs usually by cams, every movement and timing of the system is dictated by the design characteristics of the profile of the cams: it has a predominant action on the dynamics of the system. Many phenomena, such as the vibration of the drive system, impacts on the valve seat, and loss of physical contact between cam and follower can be understood and optimized by manipulation of the profile. One can minimize unwanted effects with concise understanding of the computational manipulation of the curve representing the cam profile. In industry, there are few institutions holders of such structured knowledge, which makes it difficult and costly to develop and optimize projects. Thus, the objective of this work is to present an efficient computational way to manipulate the curve representing the profile of cams, aiming their application in computer simulations and optimization routines.
Authors
Topic
Citation
Junior, R. and Pederiva, R., "Local Optimization of Parametrized Cam Profiles Applied to the Dynamic of Valvetrains," SAE Technical Paper 2014-36-0231, 2014, https://doi.org/10.4271/2014-36-0231.Also In
References
- Matthew , G.K. , Tesar , D. Vibration in Valve Springs for Internal Combustion Engines Mechanism and Machine Theory 11 247 257 1976
- Tomoyose , R. Análise Dinâmica Não Linear de Sistema de Acionamento de Válvulas com Tucho Hidráulico 2013 122 Dissertação (Mestrado) Faculdade de Engenharia Mecânica, Universidade Estadual de Campinas
- Heywood , J.B. Internal Combustion Engine Fundamentals McGraw-Hill series in mechanical engineering 1988
- Teodorescu , M. , Votsios , V. , Rahnejat , H. Multiphysics Analysis for The Determinations of Valvetrain Characteristics International Computer Science Institute 12 1 16 1995
- Qiu , H. , Lin , C.J. , Li , Z.Y. , Ozaki , H. , Wang , J. , Yue , Y. A Universal Optimal Approach to Cam Curve Design and Its Applications Mechanism and Machines Theory 40 669 692 2005
- Chen , F.Y. A Survey of the State of Art of Cam Systems Dynamics Mechanism and Machine Theory 12 201 224 1977
- Jeon , H.S. , Park , K.J. , Park , Y.S. An Optimal Cam Profile Design Considering Dynamic Characteristics of a Cam-Valve Systems Experimental Mechanics 29 357 363 1989
- Li , Z. , Li , Z.S. , Lou , Y.G. Dynamic Simulation of Distribution Cam Mechanism in Internal Combustion Engine Based on Ant Colony Algorithm CSAE 21 64 67 2005
- Li , Z. , Sun , J.B. , Lou , Y.G. Dynamical Optimization Design of Distribution Cam Mechanism in Internal Combustion Engine Based on Immune Genetic Algorithm Journal of Vibration Shock 24 68 70 2005
- Qin , W.J. , He , J.Q. Optimum Design of Local Cam Profile of a Valve Train Journal of Mechanical Engineering Science 224 2487 2492 2010
- Storn , R. , Price , K. Differential Evolution: a Simple and Efficient Adaptive Scheme for Global Optimization Over Continuous Spaces International Computer Science Institute 12 1 1 16 1995
- Lobato , F.S. Otimização Multi-objetivo para o Projeto de Sistemas de Engenharia 2008 402 Tese (Doutorado) Universidade Federal de Uberlândia
- Mandal , M. , Naskar , T.K. Introduction of Control Points in Splines for Synthesis of Optimized Cam Motion Program Mechanism and Machine Theory 44 255 271 2008