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北京吉普汽车有限公司生产的三菱帕杰罗速跑越野车分为2驱和4驱两种,2驱车装用R4A51型自动变速器；4驱车装用V4A51型自动变速器,两款自动变速器的动力传递路线相同,如图1所示。由图可知,该自动变速器采用辛普森式行星齿轮机构,其前行星架和后齿圈为一体：前齿圈和后行星架是一体,为动力输出端。在R4A51自动变速器内部有6个换挡执行元件,各换挡执行元件的作用如表1所示,不同挡位时,各部件的状态如表2所示。
Mitsubishi Jeep Co., Ltd. produced Mitsubishi Pajero speed running off-road vehicles are divided into 2 and 4 drive two, 2 drive equipped with R4A51-type automatic transmission; 4 drive equipped with V4A51-type automatic transmission, the two automatic transmission power transmission line of the same, such as Figure 1 shows. It can be seen from the figure that the automatic transmission adopts the Simpson-type planetary gear mechanism, and the front planet carrier and the rear ring gear are integrated into one: the front ring gear and the rear planet carrier are integrated and are the power output end. In the R4A51 automatic transmission has six shift implementation of the internal components, the role of the shift actuator as shown in Table 1, the different gear, the status of the components shown in Table 2.