In the present investigation, the behavior of fuel consumption was studied due to the high cost of gasoline and its price increase in Ecuador in recent years, for which reason the different mixtures have been studied to obtain lower consumption. The optimum fuel mixture rate for a T18SED e-tec II engine, Multiport Electronic Fuel Injection System (MPFI) between extra gasoline, super gasoline, and ethanol was obtained on two urban roads in the city of Quito (Ecuador). For the first test, mixtures of 10% super gasoline and 90% extra gasoline were made, and so on, for the following tests: (20–80), (30–70), (40–60), (50–50), (60–40), (70–30), (80–20), and (90–10) % super and extra gasoline. Then, mixtures between super gasoline and ethanol and extra gasoline and ethanol with concentrations of 5% and 10% were made. The results showed a low consumption on Maldonado Avenue with the 20% extra and 80% super mixtures obtaining a value of 2.9 L, while the mixture that presented a higher consumption was 100% extra of 3.4 L. At the end of each test, the fuel tank was completely drained, and the engine control unit (ECU) was reset for each test. The data acquisition was carried out through an OBD II (on-board diagnostic system) installed in each of the tests.
Study of the behavior of a single-cylinder type spark ignition Otto engine with a cylinder capacity of 200 cubic centimeters, which generates a modification in the geometry of the combustion chamber to increase the compression ratio, reaching optimal operating conditions; in order to optimize torque, power, polluting emissions and something fundamental in the social reality of Ecuador, fuel consumption. Variables are determined to be applied in a generic experimental model under controlled conditions with the application of an analysis protocol based on the use of a probe in conjunction with a piezoelectric sensor for various tests based on the effective mean pressure in different engine load cycles, using an electronic acquisition card controlled with LabVIEW software. In the testing cycle, several conditions are considered as the instantaneous speed of the vehicle with attention to the INEN 960 standard, achieving results of an increase in power of 5.85 kW, torque at 0.78 N.m, decrease in CO emissions by 13%, and HC 6.47%, and with a reduction in fuel consumption of 3.35% compared to initial conditions. These results indicate the importance of the study of effective mean pressure as a parameter of a validated experimentation model. The study projections in the branch of analysis of the indicated and real effective mean pressure allow to generate a better control in the combustion process, showing a real stability model according to the engine's behavior characteristics and work requirements.
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