Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
MEASUREMENT OF AIR MASS FLOW IN COMPRESSION IGNITION ENGINES
Submission Author:
Sara Leão , PA
Co-Authors:
Sara Leão, ANTONILSON CONCEIÇÃO, EDSON ALVES, Hendrick Zarate Rocha, Manoel Fernandes Martins Nogueira, Danielle R S Guerra
Presenter: Sara Leão
doi://10.26678/ABCM.ENCIT2018.CIT18-0346
Abstract
In many applications it is necessary to know the mass flow of air, being a quantity consisting of a determined mass of air flowing through a section in a time interval. In the automotive area this application becomes essential for the correct relation between air-fuel, looking for fuel economy, better engine performance and reduction of emissions. This study aims to develop an efficient methodology for the measurement of mass air flow in diesel cycle engines using two different meters (Measuring tools): the MAF (flow) sensor and Pitot tube (velocity). An experimental apparatus was assembled in the engines laboratory of the UFPA (Labmotor), where a diesel generator manufactured by YANMAR model 4TNV88-GGE naturally aspirated was used in the measurements, on him the original air intake system of the engine was preserved. The meters were installed simultaneously in a duct with known cross section, the objective is determine the disparities between the measurements and find a correlation between the meters. The measurements showed a superiority of the MAF sensor in relation to the Pitot tube, because the flow is highly turbulent due to the opening and closing of the engine valves, and the Pitot tube captures all this disturbance, however the MAF sensor is designed for this type of flow and presents filters, capable of decrease these disturbances
Keywords
diesel engines, Air mass flow, Sensors, MAF
