Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Computational Study of the Effect of Variable Compression Ratio on the Performance of an Internal Combustion Engine
Submission Author:
Antônio Moreira Junior , SC
Co-Authors:
Antônio Moreira Junior, Gustavo Augusto Rezende Couto, Gustavo Rodrigues de Souza
Presenter: Antônio Moreira Junior
doi://10.26678/ABCM.COBEM2017.COB17-1659
Abstract
Internal combustion engines are a subject which draws an extensive number of researches and studies, reaching incredible technological levels, nevertheless, the automotive industry still seeks for new technologies that could enhance the use of fuels’ energy and engine performance. Variable compression ratio is one of the most promising in-cylinder technologies that has been studied in recent past. The present study is a computational investigation on how the behavior of different engine performance parameters such as break mean effective pressure, torque, volumetric efficiency and specific fuel consumption varies within a range of different compression ratios (8:1 to 16:1). A four cylinder, four stroke, naturally aspirated, engine model using gasoline as fuel was created in the Diesel RK software and several simulations, using four different engine working speeds, were carried out. Optimum points of compression ratio, at which the engine reached its best performance in terms of the monitored parameters were found, thus creating a map of the most advantageous compression ratios and parameters improved by them. Furthermore, the study highlighted the positive implications of the development of variable compression ratio engines, by comparing the engine performance achieved using the current fixed compression ratio to the performance achieved using the ideal compression ratios pointed out in the simulation results.
Keywords
Engine Performance, Variable Compression Ratio, Computational Study
