Device for the operation of a starter mechanism that can be...

Details Device for the operation of a starter mechanism that can be... Device for the operation of a starter mechanism that can be...

2007-02-09

2009-11-17

Bonck, Rodney H (Department: 3655)

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

C192S003330

Reexamination Certificate

active

07617918

ABSTRACT:
A device for operating a starter mechanism actively connected with a hydraulic supply circuit of a transmission unit. The starter mechanism has a piston chamber subject to hydraulic pressure for activating a frictional shift element and a hydraulic chamber subject to hydraulic pressure for the cooling and lubricating an area of the starter mechanism. A hydraulic pressure between a lubrication pressure control port of a second pressure relief valve and the hydraulic chamber and equivalent to a lubrication pressure, is exerted on a second back pressure outlet port of a first relief valve, which acts on a valve slide of the first relief valve in the opposite direction relative to the working pressure exerted on a first back pressure outlet port of the first relief valve so that the pressure feed-back of the hydraulic pressure to the first relief valve occurs additively to the pilot signal characteristic of the first relief valve.

REFERENCES:
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patent: 6544139 (2003-04-01), Gierer et al.
patent: 2005/0269181 (2005-12-01), Gierer et al.
patent: 10 2005 016 495 (2006-10-01), None
“Elektrohydraulische Steuerung und äuβere Schaltung des automatischen Getriebes W5A 330/580 von Mercedes-Benz”,Automobiltechnischen Zeitschrift 97(1995), Nr. 10, pp. 698-706.

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