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Technologies for Gear Noise Reduction in the Newly Developed Electric Vehicle
Published October 12, 2011 by Society of Automotive Engineers of Japan in Japan
Outstanding quietness was set as one of the development targets for the Newly Developed Electric Vehicle (EV) so as to satisfy customers' expectations that EVs are exceptionally quiet. Toward that end, the gear noise of the new EV was developed to reduce substantially compared with that of conventional vehicles because the new EV has only low level of background noises (and also no engine background noise). This paper describes how superior gear noise performance was achieved from the early development stage by reducing the exciting force of gears and applying several technologies.