192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch
Reexamination Certificate
2007-07-31
2009-08-18
Lorence, Richard M. (Department: 3655)
192 clutches and power-stop control
Vortex-flow drive and clutch
Including drive-lockup clutch
C192S003330, C192S003580, C475S066000, C475S209000, C475S210000, C074S733100
Reexamination Certificate
active
07575111
ABSTRACT:
A clutch apply control valve switches between a first position and a second position based on a control pressure PDS1and a control pressure PDS2. When both the control pressure PDS1and the control pressure PDS2are output, the clutch apply control valve switches from the first position to the second position and outputs the control pressure PDS2. As a result, a lockup control valve switches to an OFF position. Accordingly, a dedicated solenoid valve for controlling operation of the clutch apply control valve can be eliminated, thus reducing both size and cost while enabling a lockup clutch to be released even if there is an ON failure of a solenoid valve.
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Ogata Yusuke
Soga Yoshinobu
Lorence Richard M.
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
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