Transmission and control

Abstract

Abstract PROVIDES WITHIN THE SPACE PROFILE OF THIS GEAR SET SPACE FOR THREE SUCCESSIVELY LARGER AREA MOTORS AND LARGER RADIUS PLATE PACKS HAVING THE SAME NUMBER OF PLATES TO PROVIDE DIRECT AND SECOND CLUTCH TORQUE CAPACITY AND REVERSE BRAKE TORQUE CAPACITY WHICH WITH A REVERSE PRESSURE BOOST TO MATCH THE TORQUE REQUIREMENTS OF THIS GEAR SET. ALSO, THE SINGLE PLATE AREA OF EACH PACK IS SUCCESSIVELY LARGER AND SUFFICIENT FOR DURABILITY. THE CONCENTRIC PLATE PACKS ARE MADE OF SETS OF THREE DIFFERENT SIZE PLATES STAMPED FROM A SINGLE BLANK. THE CARRIER HAS A CENTRAL PLATE MEMBER AND A PAIR OF SIDE MEMBERS WELDED TO THE FACES OF THE PLATE WITH THE SHORT AND LONG PINION SHAFTS MOUNTED ON THE PLATE AND SIDE MEMBERS WITHIN THE PERIMETER SO THREE OR FOUR SETS OF PINIONS CAN BE USED IN A SMALL DIAMETER GEAR SET. THE TRANSMISSION HOUSING IS FORMED OF A BELL-SHAPED CONVERTER HOUSING AND GEAR HOUSING SECURING TOGETHER AND CLAMPING THEREBETWEEN A WEAR PLATE AND A ONE-PIECE WALL STRUCTURE JOINTLY PROVIDING PASSAGES AND THE LATTER PROVIDING A PUMP AND VALVE BODY, A STATOR SHAFT AND MOTOR PORTIONS. IN THE TRANSMISSION CONTROLS, THE UPSHIFT AND DOWNSHIFT BIAS SIGNALS ARE CONTROLLED TO PREVENT HUNTING OF THE SHIFT VALVE. A DOWNSHIFT CONTROL VALVE CONTROLS THE OPERATION OF DOWNSHIFT BIAS SIGNALS SUCH THAT SOME OF THE BIAS SIGNALS ARE DISCONNECTED FROM THE SHIFT VALVE DURING UPSHIFTED LOW TORQUE DEMAND OPERATION. THE CONTROL ALSO DIRECTS FLUID THROUGH THE SHIFT VALVE AND A SHIFT CONTROL VALVE TO ENGAGE AND DISENGAGE THE FRICTION TORQUE ESTABLISHING DEVICES. THE TRANSMISSION SHOWN HAS A TORQUE CONVERTER DRIVING AN INPUT DRUM AND A GEAR UNIT HAVING AN INNER DRUM CONNECTED TO AN INPUT SUN GEAR MESHING WITH A SHORT PINION WHICH MESHES WITH A LONG PINION. BOTH PINIONS ARE MOUNTED ON THE OUTPUT CARRIER. THE LONG PINION MESHES WITH A REACTION SUN GEAR AND WITH AN INPUT REACTION RING GEAR SPLINED TO AN OUTER DRUM AND WITH A REACTION SUN GEAR. WHEN THE REACTION SUN GEAR IS HELD, LOW RATIO IS PROVIDED BY A ONE-WAY CLUTCH IN AUTOMATIC LOW GEAR AND BY THE ONE-WAY CLUTCH AND A DIRECT CLUTCH IN MANUAL LOW TO PROVIDE ENGINE BRAKING. THE DIRECT CLUTCH IS LOCATED BETWEEN THE INPUT DRUM AND INNER DRUM. THE INPUT DURING SECOND RATIO IS PROVIDED BY AN INTERMEDIATE CLUTCH LOCATED BETWEEN THE INPUT DRUM AND THE OUTER DRUM AND THE REACTION IS PROVIDED BY THE REACTION SUN GEAR. FOR THIRD RATIO, THE REACTION SUN GEAR IS RELEASED AND BOTH CLUTCHES DRIVE. FOR REVERSE, THE REVERSE PLATE BRAKE BETWEEN THE OUTER DRUM AND AN OUTERMOST FIXED HOUSING DRUM AND THE DIRECT CLUTCH ARE ENGAGED. THE ENGAGEMENT OF THE DIRECT CLUTCH IN REVERSE SUPPLEMENTS THE INPUT TO THE GEAR SET THROUGH THE ONE-WAY CLUTCH AND PREVENTS FREEWHEELING IN REVERSE GEAR. THE DIRECT CLUTCH HANDLES NO TORQUE EXCEPT ON COASTING. THE DRUMS ARE CONCENTRICALLY ARRANGED AND SUCCESSIVELY LONGER FROM THE SHORT INNER DRUM TO THE LONGEST OUTERMOST FIXED DRUM SO THE SUCCESSIVELY OUTER CLUTCH AND BRAKE PLATE PACKS ARE FURTHER FROM THE GEAR SET AND THE FLUID MOTOR FOR OPERATING EACH PLATE PACK CLEARS THE INNER DRUM AND IS WITHIN THE OUTER DRUM FOR THAT PLATE PACK. THIS MOTOR AND PLAT PACK ARRANGEMENT WITH SHEET METAL INTERMEDIATE AND OUTER DRUMS, HAVING ROLLED NESTED SPLINES,

Inventors

• 👤 Raymond P Michnay
• 👤 Charles R Moore
• 👤 Gilbert K Hause

Bibliographic Details