| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an automatic transmission capable of performing speed change for seven forward stages by five engaging elements. Ž<P>SOLUTION: This automatic transmission includes first to fourth planetary gears 4, 6, 7, 8. A ring gear Rr is integrated with a ring gear Rm (first connected body), a second connected body Cm, Cr, Ca is composed by connecting a carrier Cm, a carrier Cr, and a carrier Ca, and a sun gear Sr is integrated with a sun gear Sa (third connected body). The automatic transmission further includes a first engaging element C1 connecting a carrier Cf to the first connected body Rm, Rr, a second engaging element C2 connecting the carrier Cf (second element) to the third connected body Sa, Sr, a third engaging element C3 connecting the second connected body Cm, Cr, Ca, to an input shaft 2, a fourth engaging element B1 fixing a sun gear Sm to a transmission case 1, and a fifth engaging element B2 fixing the second connected body Cm, Cr, Ca to the transmission case 1. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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