Analysis of Engine and Powertrain Losses of a Passenger Type 4-Stroke Gasoline Vehicle in 4 Different Driving Cycles with GT-Suite Vehicle Simulation Program

Abstract

Vehicle simulations have a very important place in the automotive R&D process. These simulations provide automotive companies with the benefits of saving money on model creation and the user changing many parameters throughout the vehicles as soon as possible. In this study, the engine and powertrain energy losses of a 4-stroke gasoline passenger car were investigated in FTP75 (Federal Test Procedure), HFET (Highway Fuel Economy Test), US06 and WLTP (Worldwide Harmonized Light Vehicles Test Cycles) cycles, in urban and extra-urban conditions. examined physically and by testing with the help of GT-Suite vehicle simulation program. Ac-cording to the analysis results, the lowest CO2 emission (127.58 g/km) and average fuel consumption (5.29 l/100km) were obtained in the HFET driving cycle. While the transmission and gear friction values were close to each other between the driving cy-cles, the lowest loss in terms of torque converter losses was obtained in the HFET driving cycle (0.2%).