Automatic transmission

Details Automatic transmission Automatic transmission

F - Mech Eng,Light,Heat,Weapons

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H

74/123

F16H 47/08 (2006.01) F16H 3/44 (2006.01)

Patent

CA 1110877

TITLE AN AUTOMATIC TRANSMISSION ABSTRACT OF THE DISCLOSURE A multi-ratio motor car automatic transmission comprising two planetary gear trains and a coupling between input and output. Each train comprises a sunwheel, planet pinions, planet pinion carrier and internally toothed annulus. Two clutches and two or three friction reaction brakes hold stationary and/or prevent or allow various parts of the gear trains to rotate to select one of the ratios. The manner of selection is such as to reduce reliance of the trans- mission on the coupling so as to reduce losses in the coupling and thereby improve fuel consumption. Arrange- ments are described suitable for rear engined and trans- verse front engined vehicles as well as for the more conventional front engine layout. -1-

317719

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