Rediseño del sistema de propulsión y optimización del consumo de combustible mediante la utilización de una unidad de control electrónico programable para un prototipo diseñado para la Shell Eco-Marathon 2019.

Abstract

By increasing the compression ratio of the Honda GX 35 engine and implementing the electronic control unit to obtain greater energy efficiency since that is the basis of competition. This technological proposal was based on the literature review and the results of the teams participating in previous competitions. To select the appropriate method for increasing of the compression ratio of the engine, decision matrices were made. In the same way, to select the control unit, the electronic control units that can be acquired in our environment were taken into account, and then submitted to a decision matrix. The method to increase the compression ratio was to place a piston of the same diameter, but of a greater height specifically for the Honda GX 31 engine. The piston was subjected to a machining process to prevent it from wearing the head, the spark plug and the valves. As a result, an increase in the compression ratio of 12: 1 improving its energy efficiency. The selected control unit was MicroSquirt that met the necessary conditions for the operation of the GX 35 engine, which was coupled to the sensors and actuators of the EcoCal electronic injection system, except for the CKP sensor, the coil and the control module, using the TunerStudio MS software, which allows modifying the operating parameters of the actuators to achieve the lowest fuel consumption. As a result, a prototype covering 400 km / L was obtained, which passed without any difficulty the technical review of the competition. It is recommended to replace the 4-stroke GX35 electronic injection engine with a more robust engine so that it performs better and prevents possible fractures in its internal parts.