Abstract

LOPEZ, Andrés et al. Methodology for inferring the performance map and fuel consumption of an alternative internal combustion engine. Novasinergia [online]. 2022, vol.5, n.1, pp.43-60.  Epub Jan 31, 2022. ISSN 2631-2654.  https://doi.org/10.37135/ns.01.09.04.

Abstract: The objective of this work was to calculate fuel consumption using the engine map. Speed, engine load, torque, and power were measured to identify the working zones of the engine in its operating range. The fuel consumption was measured by the gravimetric method and the onboard diagnostic system. To determine the relationship between engine speed, mean effective pressure or effective torque, and specific fuel consumption, an algorithm was developed that relates engine condition to fuel consumption. Fuel consumption was measured in three scenarios. In the extra-urban route, an efficiency of 4.9 L/100 km was obtained, increasing 29% compared to the manufacturer's data. It was concluded that the factors that substantially affect engine performance and cause an increase in fuel consumption are: fuel and altitude above sea level. Thus, the fuel consumption zones on the engine map determine the engine's behavior in different performance locations of the vehicle.

Keywords : Average effective pressure; chassis dynamometer; engine maps; fuel calorific value; fuel consumption; spark ignition engine; torque curve; power curve.021.

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