Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Plural elements selectively braked
Patent
1993-07-08
1994-12-06
Wright, Dirk
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Plural elements selectively braked
475287, 475290, F16H 364, F16H 5710
Patent
active
053705890
ABSTRACT:
An automatic transmission for passenger cars has input and output shafts in alignment, three planetary gearsets, first, second and third control clutches and first and second control brakes, and can be coupled to a torque converter with or without a lock-up clutch. Five forward gears and a reverse drive are provided, with excellent ratio progression and high design versatility. As a rule, a direct drive available between third and fourth gears is not used. A first one-way clutch can be added in parallel with the first control brake to facilitate first/second and second/first power-on gearshifts. A second one-way clutch can be added in parallel with the second control clutch to facilitate fourth/fifth and fifth/fourth power-on gearshifts, without requiring an additional control clutch to be mounted in series to release it in other gears. The transmission is remarkably compact and can easily be substituted for existing four-speed transmissions.
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Warrendale, "Overdrive automatic features multi-functional elements", Automotive Engineering, Jul. 1978, vol. 96, No. 7, pp. 56-59.
Jatco Corporation, "Four-Speed Fill Range Electronically Controlled Automatic Transmission with Turbine Revolution Sensor JR404E".
Japan Automatic Transmission Co., Ltd., "JF403E New 4-speed Electronically Controlled Automatic Transmission".
Ta Khoi Q.
Wright Dirk
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