192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch
Reexamination Certificate
2007-02-09
2009-11-03
Le, David D (Department: 3655)
192 clutches and power-stop control
Vortex-flow drive and clutch
Including drive-lockup clutch
C192S003330
Reexamination Certificate
active
07611002
ABSTRACT:
An apparatus for operating a hydrodynamic torque converter and a corresponding converter-bypass clutch of a transmission, having a solenoid valve communicating with a variable pressure control valve. The respective valve stem assembly thereof having surfaces which react to an application of hydraulic pressure. Each valve being controlled by a pilot pressure countering a spring arrangement. A spent fluid flow side of the torque converter communicates with a spent fluid flow aperture of the solenoid valve. The valve stem assembly related, to the solenoid valve is blocked by a supply aperture of the solenoid valve and is in operational connection with an auxiliary pressure control valve. A supply aperture of the variable pressure controller valve is connected with an operational pressure aperture of the pressure control valve, which, can be connected with a piston space of the converter-bypass clutch, which pressurized hydraulic fluid can be applied.
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“Elektrohydraulische Steuerung und äuβere Schaltung des automatischen Getriebes W5A 330/580 von Mercedes-Benz”,Automobiltechnischen Zeitschrift 97(1995), Nr. 10, pp. 698-706.
Gierer Georg
Schmidt Thilo
Davis & Bujold P.L.L.C.
Holmes Justin
Le David D
ZF Friedrichshafen AG
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