Lubricants Technology Applied to Transmissions in Hybrid Electric Vehicles and Electric Vehicles 2019-01-2338
The aim of this study is to investigate how lubricants used for transaxles in hybrid electric vehicles (HEVs) and electric vehicles (EVs) give an impact on the cooling performance for electric motors. As a result, reducing lubricant viscosity improve heat transfer in both natural and forced convection conditions. Quantitative analysis could reveal that kinetic viscosity and heat conductivity of fluids are highly influential on the cooling performance. In addition, we investigated the effect of lubricant additive on fatigue life in bearing components by using a thrust needle roller bearing tester. Extreme pressure agent could control a morphology of the bearing raceway surface, playing a role in extending a fatigue life of the bearing.
Citation: Narita, K. and Takekawa, D., "Lubricants Technology Applied to Transmissions in Hybrid Electric Vehicles and Electric Vehicles," SAE Technical Paper 2019-01-2338, 2019. Download Citation
Keiichi Narita, Daisuke Takekawa
Lubricants Research Laboratory, Idemitsu Kosan Co., LTd.Ichi
2019 JSAE/SAE Powertrains, Fuels and Lubricants