Machine element or mechanism – Gearing – With fluid drive
Patent
1982-04-06
1985-04-23
Herrmann, Allan D.
Machine element or mechanism
Gearing
With fluid drive
74732, 74752C, 74762, 74869, 192 331, 192 357, 192 0052, F16H 4700, F16H 5710, F16D 3300, B60K 4122
Patent
active
045122121
ABSTRACT:
An automatic power transmission including a torque converter and a planetary type multiple stage gear transmission unit. The torque converter is provided with a lock up clutch for mechanically connecting the converter pump with the turbine so that the engine output torque is directly transmitted to the gear transmission unit. The engagement of the lock up clutch is controlled by the difference between the governor pressure which represents the vehicle speed and the throttle valve kickdown pressure which indicates whether or not the engine throttle valve is in or substantially in the full open position so that the lock up clutch can be engaged at a relatively low speed under a normal operation.
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Aisin Seiki Kabushiki Kaisha
Andrews Stephen B.
Herrmann Allan D.
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