192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch
Reexamination Certificate
2007-02-09
2009-12-08
Bonck, Rodney H (Department: 3655)
192 clutches and power-stop control
Vortex-flow drive and clutch
Including drive-lockup clutch
C192S003330
Reexamination Certificate
active
07628261
ABSTRACT:
An apparatus operating a hydrodynamic torque converter and a corresponding converter-bypass clutch of a transmission. The apparatus having a line system, a solenoid valve and a therewith coacting variable pressure controlling valve. A valve stem assembly respectively of the solenoid valve and the pressure control valve are controllable by subjection to a pilot pressure counter to a spring arrangement. A spent flow of the torque converter is, by way of a piston chamber of the converter-bypass clutch, which chamber is subjected to hydraulic fluid pressure of the spent flow of the torque converter, by means of an operational pressure aperture valve and a relief control aperture valve of the pressure control valve, connectable to a spent flow control aperture valve of the solenoid valve. By way of the piston chamber, this spent flow communicates with the hydraulic system through the spent flow control aperture valve of the solenoid valve.
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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
Bonck Rodney H
Davis & Bujold P.L.L.C.
Holmes Justin
ZF Friedrichshafen AG
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