Análisis comparativo de las emisiones de gases contaminantes entre un sistema de inyección monopunto y un sistema de inyección multipunto indirecta utilizando una ecu programable en un vehículo Suzuki Vitara JX

Abstract

The objective of this degree work was to conduct a comparative analysis of polluting gas emissions between a single point and indirect multipoint injection system with a programmable ECU in a Suzuki Vitara JX vehicle and its fuel consumption, torque, and vehicle power. The exhaust gas emission values were obtained at the "CCICEV" certified center under the NTE INEN 2203 standard, where CO [%v] and HC [ppm] were studied both at idle and at a steady state. Turn stop, for fuel consumption, a 74.5 [km] route was selected between the city of Riobamba and Ambato, an external fuel tank was also adapted, and a speed range between 30 to 90 [km/h] was established for travel the route, values that were controlled with the Race Chrono application, as well as obtaining the torque and power of the vehicle on a Bapro brand dynamometer that measures torque and power to the wheels. The results of exhaust gas emissions of the multipoint injection system with programmable ECU presented a decrease in CO [%v] and an increase in HC [ppm] of 74.38% and 117.78% at idle, 51.54% and 113.06% at idle. Correlatively high rotation compared to the single point injection system, 5.43% less fuel consumption, and increased torque and power of 1.21% and 8.81%, respectively. In conclusion, the multipoint injection system with programmable ECU presents a decrease in CO [%v] and an increase in HC [ppm], lower fuel consumption, and greater torque and power than the single-point injection system. It is recommended to conduct technical inspections of the vehicle before the relevant tests to guarantee its correct operation and not alter the results.