RT Journal Article SR Electronic A1 Puškár, Michal A1 Kopas, Melichar A1 Puškár, Dušan T1 Development of Fuel Maps in Hexadecimal Format for Reduction of NOX Emissions and Application in Real HCCI Engine JF Acta Mechanica Slovaca YR 2018 VO 22 IS 2 SP 38 OP 47 DO 10.21496/ams.2018.016 UL https://www.actamechanica.sk/artkey/ams-201802-0007.php AB The newest generation of the electronic control systems, which are determined for the combustion engines, is characterised by a complex structure of the control algorithm. Modification of these systems is performed using a data field editing in order to reach the maximal output parameters. The active algorithms of the control units gained a remarkable participation and mutual relation. The control software is operating with the numerical combinations, which are described in a hexadecimal format. There were suggested various types of the fuel maps and they were tested by means of measurement realised during four sequences of a powerful engine. At the same time there were also monitored, during all the operational measurements, the working parameters using a data link connection. The results obtained from measurement that were performed at the complex dynamometric station confirm a relevant contribution in the area of the engine power output characteristics utilizing the developed hexadecimal matrix. A typical characteristic of the engine torque demonstrates a continuous increase of the torque values within a wide range of the engine speed.