Abstract
AbstractThe location of the electric motor (EM) within the transmission in an electric vehicle requires the compatibility of automatic transmission fluids (ATF) with the EM and transmission materials. This work studies the compatibility of four conventional ATF with three structural polymers (PEEK, PTFE and PA66) and three elastomers (FKM, EPDM and silicone). Changes in volume and hardness of the materials after a period of aging in ATFs were measured. Complementary tests were carried out to explain the results. All four ATFs showed good compatibility with all materials except EPDM. This low compatibility was related to changes in the composition and crystalline structure of the elastomer. PA66, despite its good results, showed a certain hardening due to an increase in the degree of crystallinity after aging, so it is necessary to monitor its results in resistance tests.
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