Eventos Anais de eventos
DINAME2019
DINAME2019
Cam Profile Optimization of a Nonlinear Valve Train Dynamic System
Submission Author:
Flávio Yukio Watanabe , SP
Co-Authors:
Celso Tadeu do Cabo, Flávio Yukio Watanabe, Sidney Bruce Shiki
Presenter: Sidney Bruce Shiki
doi://10.26678/ABCM.DINAME2019.DIN2019-0080
Abstract
The internal combustion engines are complex and widely used equipment in automotive and energy fields. This machine has as main function the conversion of thermal energy from the fuel combustion into mechanical energy. The technological development and the increasing need of improvements such as energetic efficiency and reduction of emissions, brought many studies related to internal combustion engines in many fields of knowledge, such as thermodynamics, fuels, tribology, materials, manufacturing, vibrations and dynamics. In the dynamics of mechanisms subject, many studies related to the slider-crankshaft and the valve train systems are of higher importance in the development and optimization of this equipment. The main objective of this work is to present a study related to the optimization process of a cam profile and its effects in the dynamic behavior of the valve train system. To accomplish this purpose, it was used a real cam of a mono cylinder engine with an overhead valve system. The cam profile of this system was measured and optimized searching the minimization of the root mean square (RMS) values of acceleration of the valve applied in a nonlinear dynamic model, using a hybrid optimization methodology, using sequential quadratic programming (SQP) and genetic algorithms. The simulation results show a global reduction in the residual accelerations generated by the closing of the valve, when compared with the behavior of the original cam profile.
Keywords
CAM, Optimization, Valve train, Dynamic, Nonlinear
