Desarrollo de una metodología experimental para la determinación del flujo de dosado de hidrógeno para un motor otto de cuatro tiempos

Abstract

In this project, an experimental methodology was developed to determine the hydrogen dosing flow in a 4-stroke Otto engine. A Trisco DA 830 multimeter was used as a tachometer with a precision of ± 1.2% of the engine revolutions, to measure the TPS voltage the OTC 3980 Automotive multimeter was used with a precision of ± 0.5% of DC voltage and To measure the hydrogen flow, an MF digital gas flow meter with an accuracy of ± (2.0+0.5FS) % is used that measures from 0 to 20 liters per minute with a maximum pressure of 0.2 MPa. 8 repetitions of the 4 load levels were made when the engine ran with hydrogen, thus obtaining the experimental hydrogen flow that the engine needs to operate at those load levels. These values were compared with theoretical calculations that estimate the hydrogen flow necessary for engine combustion; The average margin of error of the results is less than 7%. From these data, the mathematical function was obtained using MATLAB, which defines the hydrogen dosing flow as a function of the load and engine speed. The equation is demonstrated at levels that were not previously used to generate it and it is confirmed that there is no significant difference between the samples generated with our mathematical equation and those obtained experimentally with the 2000 cc engine running completely on hydrogen.