Multiple ratio overdrive transmission

Details Multiple ratio overdrive transmission Multiple ratio overdrive transmission

F - Mech Eng,Light,Heat,Weapons

16

H

74/138

F16H 47/06 (2006.01)

Patent

CA 1158068

ABSTRACT OF THE DISCLOSURE A multiple ratio automotive vehicle transmission having a hydrokinetic torque converter and a compound plane- tary gear unit that establish a plurality of underdrive ratios, a direct drive ratio and an overdrive ratio, the ratio changes from the first underdrive ratio to a second underdrive ratio from the second underdrive ratio to the direct drive ratio each being established by engagement by a single torque esta- blishing device, brake means for controlling application and release of the torque establishing devices to effect transmission of reaction torque from a reaction element of the gearing to a stationary portion of the mechanism, said controlling means being. adapted to establish optimum shift points during ratio changes regardless of the magnitude of the torque being delivered at the instant a ratio shift occurs. An engine-controlling throttle communicates with the control- ling means to provide a force assist that reduces the force necessary to actuate a movable portion of the throttle.

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