RT Journal Article
T1 Cooling performance of fresh and aged automatic transmission fluids for hybrid electric vehicles
A1 Rivera, Noelia
A1 Viesca, José Luis
A1 García, Alberto
A1 Iglesias Prado, José Ignacio
A1 Lugo Latas, Luis
A1 Hernández Battez, Antolin
K1 2213 Termodinámica
K1 2213.02 Física de la Transmisión del Calor
K1 3306 Ingeniería y Tecnología Eléctricas
AB The cooling performance of automatic transmission fluids (ATFs) plays an important role in hybrid electrical vehicles, in which the electric motor (EM) is placed inside the transmission housing due to their mission of cooling the EM. The cooling performance of the ATFs depends on their thermophysical properties, but these properties change with the oxidation of the ATFs. This work studies the influence of the oxidation of three ATFs (A, B, C) on their thermophysical properties, as well as on some figures-of-merit (FOMs) which are relevant for evaluating the cooling performance. The results indicated that the influence of the molecular structure on thermal conductivity and heat capacity is stronger than on density and viscosity, whereas the molecular structure hardly affects the FOMs of the fresh ATFs; ATFs B and C, formulated with base oils from API Group III, indicated better cooling performance than ATF A which was formulated with base oils from API Group I; the sensitivity to temperature of the variation with oxidation of the studied properties, including the FOMs, was almost null, except for ATF A; therefore, FOMs should be used to compare the cooling performance of ATFs for electric drivetrains instead of a single property, such as thermal conductivity.
PB Applied Sciences
SN 20763417
YR 2022
FD 2022-09-05
LK http://hdl.handle.net/11093/3814
UL http://hdl.handle.net/11093/3814
LA eng
NO Applied Sciences, 12(17): 8911 (2022)
NO Ministerio de Ciencia, Innovación y Universidades | Ref. PID2019-109367RB-I00
DS Investigo
RD 13-dic-2024