Optimización del pistón de un motor marca Qingqi a gasolina cuatro tiempos monocilíndrico 150 cc a través de un estudio CAE y construcción del mismo aplicando las herramientas CAD/CAM

Abstract

This technological proposal was focused on the study of the impact of the geometry of the Qingqi 150cc piston; a gasoline four-stroke of a single cylinder engine, in the consumption of fuel and emission of polluting gases such as HC and CO, starting from the modification of the original piston, after obtaining the CAD using SolidWorks software, later various simulations were developed in Ansys: the static-structural, thermal and dynamic, both of the standard as the modified pistons. Then, the 3D printing was carried out, using carbon fiber as material, 0.1mm quality and 30% of infill between each layer of the molds material, to cast a permanent matrix in bronze, the same one that would give the details of the external piston. For the internal details; cores of silica sand mixed with sodium silicate, to melt by gravity in a chill and obtain the casting with aluminum 4032-T6. For the final details of the piston, machining was carried out by means of CNC with the use of a lathe and milling machine with a Fanuc controller. For the validation of the degree work, three consumption tests were made at different revolutions: 3000, 4000 and 5000 RPM, plus a static gas analysis test, using the MAHA 6.3 analyzer; with the engine running in optimal conditions, tests were performed with the standard and modified pistons. It is always recommended to be under the supervision of a professional with the necessary training in the foundry area since there are highly dangerous procedures and involves a lot of responsibility.