Patent ID: 7942252
Filing Date: 2011-05-17
Classification: F16D,F16H,Y10T

Abstract:
1. An automatic transmission ( 20 ) of a motor vehicle, comprising a transmission housing ( 79 , 80 , 81 ) including a gear shift module ( 24 ) with gear shift elements ( 34 , 65 , 68 , 70 ), a plurality of fluid-activated piston cylinder units ( 37 , 73 , 74 , 75 ) disposed in the gear shift module ( 24 ) for operating the gear shift elements, said gear shift module ( 24 ) including a module baseplate ( 71 ) forming part of the cylinders of the piston cylinder units ( 37 , 73 , 74 , 75 ) and at least part of a housing ( 82 ) of a countershaft brake and part of a central clutch disengager ( 83 ) of a starting clutch ( 76 ), the gear shift module ( 24 ) and the starting clutch ( 76 ) being arranged in a front housing part ( 79 ) and a main transmission ( 22 ) of the automatic transmission ( 20 ) being arranged in a central housing part ( 80 ) which adjoins the front housing part ( 79 ), the gear shift module ( 24 ) having a module cover ( 72 ), the module baseplate ( 71 ) and the module cover ( 72 ) forming the cylinders of the piston cylinder units ( 37 , 73 , 74 , 75 ) and being fastened to the front housing part ( 79 ).