Patent ID: 6826974
Filing Date: 2004-12-07
Classification: B60W,F16H,Y10T

Abstract:
An automatic transmission comprising:a plurality of gear trains provided between an input shaft and an output shaft, said gear trains each including a drive gear mounted on said input shaft and a driven gear mounted on said output shaft; a start clutch between a crankshaft of an engine and said input shaft; a changeover mechanism that selects a desired gear train through which power is transmitted; a plurality of bypass clutches to transmit torque directly from said input shaft to said output shaft using said plurality of gear trains; and a bypass clutch control means for engaging at least one of said plurality of bypass clutches, wherein said plurality of bypass clutches comprises: a first bypass clutch that engages a high gear ratio within a group of consecutive lower ratio gear trains; and a second bypass clutch that engages a high gear ratio within a group of consecutive higher ratio gear trains.