Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – Fluid pressure actuator for adjustment of member
Reexamination Certificate
2005-10-27
2011-11-29
Mansen, Michael (Department: 3654)
Endless belt power transmission systems or components
Pulley with belt-receiving groove formed by drive faces on...
Fluid pressure actuator for adjustment of member
C474S103000, C474S104000, C474S110000, C477S045000, C477S046000, C477S048000, C477S160000, C477S163000
Reexamination Certificate
active
08066595
ABSTRACT:
A hydraulic control system for a vehicular drive system including a hydraulically operated belt-and-pulley type continuously variable transmission and a hydraulically operated frictional coupling device engaged for running of a vehicle, the hydraulic control system including: a first solenoid valve for regulating a belt-tensioning hydraulic pressure for tensioning a belt of the transmission, a second solenoid valve for regulating a transient coupling hydraulic pressure to be applied to the frictional coupling device in the process of an engaging action, a line-pressure regulating valve for regulating a line pressure used for hydraulically operated devices of the mechanism, and a hydraulic-circuit switching device operable to apply a control pressure of the second solenoid-operated valve to the line-pressure regulating valve after the frictional coupling device has been placed in a fully engaged state, and to apply a first control pressure of the first solenoid-operated valve to the line-pressure regulating valve while the frictional coupling device is in the process of the engaging action.
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Habuchi Ryoji
Ogata Yusuke
Soga Yoshinobu
Liu Henry
Mansen Michael
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
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