Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
CONVERSION ANALYSIS OF A FOUR-STROKE TO A TWO-STROKE INTERNAL COMBUSTION ENGINE
Submission Author:
Antônio Carlos Barbosa Zancanella , ES
Co-Authors:
Lucas Henrique Pagoto Deoclecio, Ryck Andrade Boroto, Filipe Arthur Firmino Monhol, Antônio Carlos Barbosa Zancanella
Presenter: Walber Ronconi dos Santos
doi://10.26678/ABCM.COBEM2019.COB2019-0064
Abstract
Nowadays, the most used engine in vehicles in the world is the four-stroke engine; however, the two-stroke engine has higher specific power, since it has fewer cycles. However, the conventional two-stroke engine exhibits a high rate of pollutants emission and fuel consumption; additionally, its lubrication is precarious, which decreases its durability. The present work proposes a change of a conventional four-stroke engine to a new version of a direct-injection supercharged two-stroke engine in a way which allows for an increase in power, characteristic of the two-stroke engines, as well as greater durability, such as of four-stroke engines. The proposal is made by altering the opening and closing times of the engine valves and adding a turbocharger. This prevents the unreacted fuel to be exhausted with the flue gases, and it allows the lubrication to be done as in a four-stroke engine. The ideal air-standard thermodynamic cycle was the tool employed to access the power gains of the two-stroke engine proposed in this paper in comparison with the four-stroke engine with the same dimensions, a 0.999-liter three-cylinder engine. The analyses demonstrated that the four and two-stroke engines power at a rotation of 6250 rpm could be estimated at 56.0 and 92.7 kW, respectively, which represents a 65.5% increase in power
Keywords
Internal combustion engine, two stroke engine, Four-Stroke Engine, thermodynamic analysis
