Analysis of The Effect of Different Gearbox/Transmission Types on Driveline Friction Losses by Means of Gt Suite Simulation Programme

Authors : Mehmet Akif KUNT

Pages : 271-280

Doi:10.30939/ijastech..945675

View : 20 | Download : 10

Publication Date : 2021-09-30

Article Type : Research Paper

Abstract :Selection of transmission systems of motor vehicles used on highways is high-ly important in terms of fuel consumption and vehicle efficiency. In this study, effect of using 3 different gearboxes in a passenger car insert ignore into journalissuearticles values(automatic gearbox, CVT gearbox and manuel gearbox); on driveline friction losses and engine operation interval by means of GT SUITE vehicle modelling programme. The vehicle model formed has been simulated in 3 different driving cycles insert ignore into journalissuearticles values(WLTP, HFET and US06); and transmission system losses have been compared. In WLTP driving cycle in which speed changes and average speed are low, frictions resulting from the load constitute a significant part of total frictions; on the other hand, in driving cycles in which driving mode is aggressive and the average speed is high, frictions re-sulting from lubricant and sealing elements constitute a significant part of total frictions. Gearbox and related clutch mechanism selection have changed opera-tion interval of the engine during driving cycle.
Keywords : Driving cycle, GT SUITE, transmission losses, lock up clutches