10.15660/AUOFMTE.2019-2.3467
V Blaga, T Mitran, G Dragomir, D Făgădar
tudor_mitran@yahoo.com
Volume XXVIII, 2019/2
Based on an own model, the authors have realized the analytical calculus of the temperatures in the characteristic points of the thermodynamic cycle for a GDI engine. These temperatures were calculated depending on the engine’s rotational speed and on the environmental temperature (considered to be equal to the one in the intake valve port) and for an excess air factor λ=1. The first step was the development of the mathematical model of the engine’s cycle. The model includes the presentation of the initial data for the thermal calculus and the correlation between the expressions of the parameters in order to develop the computing programs. The calculated data were compared with experimental data acquired at environmental temperature, at maximum power and at the rotational speed corresponding to the maximum power (full load). The results show that the proposed model is accurate enough to be a useful tool for the study of GDI engines.
ISSN 1583-0691, CNCSIS "Clasa B+"