| 摘要 |
An automatic transmission for an automotive vehicle includes a continually variable drive mechanism (16) having one sheave assembly (54,56) fixed to an input shaft (12) and an output sheave assembly (58,60) supported on an intermediate shaft (34), a planetary gearset having a sun gear (63) fixed to the input shaft (12), and a carrier (68) fixed to an output shaft (14), a first fixed ratio drive mechanism (18) in the form of a chain drive providing a torque delivery path between the intermediate shaft (34) and a ring gear (64) of the gearset, a second fixed drive mechanism (22) in the form of a chain drive located in a torque delivery path between the output shaft (14) and a front drive shaft, a transfer clutch (102) for connecting and releasing the output sheave (58,60) of the variable drive mechanism (16) and sprocket wheel (32) fixed to that shaft (34), a forward brake (98) and reverse brake (100) for holding alternately the ring gears (64,78) of the gearset, and a clutch (104) for selectively driveably connecting the output of the second fixed drive mechanism (22) to the front drive shaft. <IMAGE> |
