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辛普森(Sim pson)结构是汽车自动变速器行星齿轮的基本结构之一。TOYOTA A40DE自动变速器行星齿轮机构由共太阳轮式辛普森齿系和超速行星排组成,可实现4个前进速比。TOYOTA U340自动变速器行星齿轮机构为独立太阳轮式,可实现4个前进速比。
Simpson (Sim pson) structure is one of the basic structure of planetary gear automatic transmission. TOYOTA A40DE automatic transmission planetary gear mechanism consists of a common-sun Simpson gear system and speeding planetary rows, enabling four forward speed ratio. TOYOTA U340 automatic transmission planetary gear mechanism for the independent sun wheel, can achieve four forward speed ratio.