Optimización de un motor ciclo Otto atmosférico 1.2 lt mediante la modificación geométrica del múltiple de escape

Abstract

The technical project was carried out with the purpose of optimizing the performance of a naturally aspirated four-cylinder 1.2 L Otto cycle engine by modifying the geometry of the exhaust manifold. The research focuses on studying the most influential variables affecting exhaust system restriction, measuring backpressure using an EMP sensor, and designing and simulating both the original and modified manifolds using CAD/CAM software, followed by manufacturing and validating the results on a dynamometer bench. Regarding the results, engine power increased from 60.8 kW to 66.4 kW, representing a relative gain of 9.25%; and torque increased from 105.4 Nm to 118.2 Nm, corresponding to a 12.15% improvement. Exhaust pressure decreased from 95.59 kPa to 89.53 kPa, which is 6.34% lower than the original system.