Construcción de un prototipo de motor de combustión interna

Abstract

This document covers practical and theoretical information concerning the construction of an internal combustion engine prototype, using casting and machining processes. The design of the prototype was developed by the English engineer and designer Edgar T Westbury (1896-1970).

Some files such as: SLDPRT and STL files, for the 3D printing of the models and some updates developed in this project are accessible on the website. https://sites.google.com/view/motorprototipoepn2020, their respective download and reproduction.

The theoretical framework section summarizes the general aspects of an internal combustion engine were described, specific to the one proposed to be manufactured, as well as its operation and the materials generally used in its manufacture. In addition, information about the parameters that influence the casting and machining processes by chip removal.

In the case of the casting processes, topics such as: modeling, study of sands (silica), resins, feeding systems and the application of Aluminum A356.0 (AL-7Si-0.3Mg), obtained in the EPN foundry laboratory, with which parts were obtained for the construction of the internal combustion engine prototype, will be covered.

Within the machining by chip removal, the cutting speeds for the machine tools are finished: milling machine and lathe. Other parameters were also studied such as: the selection of the cutting tools, the correct position of the elements to be machined and in this way synthesize the practical experience in obtaining parts for the internal combustion engine prototype.

In the results and analysis sections were discussed surface finishes as well as defects present when obtaining the castings and in the case of machining by chip removal, we will discuss the appropriate processes for each of the roughing and finishing stages (clamping, tuning, tolerances). Allowing this study to serve in the reproduction of combustion engine prototypes and possibly the construction of an engine with more power in future projects in the EPN metal casting laboratory.