Planetary gear transmission systems or components – Electric or magnetic drive or control – With electric or magnetic controlled brake
Patent
1997-05-28
1998-11-10
Wright, Dirk
Planetary gear transmission systems or components
Electric or magnetic drive or control
With electric or magnetic controlled brake
475158, 475 98, F16H 6100
Patent
active
058335650
ABSTRACT:
An oil pressure control system for an automatic transmission in which an initial pressure of oil pressures to be fed selectively to apply frictional engagement elements is controlled according to an engine load. The control system comprises an oil pressure keeper for keeping the initial pressure during a shift at a constant level independent of the engine load. Thus, the rates of feeding the oil pressures to the frictional engagement elements are constant so that the shift shock is suppressed to reduce the factors for the oil pressure fluctuation thereby to facilitate the control.
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Kimura Hiromichi
Yasue Hideki
Kwon Peter T.
Toyota Jidosha & Kabushiki Kaisha
Wright Dirk
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