192 clutches and power-stop control – Vortex-flow drive and clutch – Including drive-lockup clutch
Reexamination Certificate
2006-03-16
2010-11-02
Bonck, Rodney H (Department: 3655)
192 clutches and power-stop control
Vortex-flow drive and clutch
Including drive-lockup clutch
C192S085630
Reexamination Certificate
active
07823710
ABSTRACT:
Description of a hydraulic control system (1A) for a hydrodynamic torque converter (1) with a controlled torque converter lockup clutch (2) of an automatic transmission for controlling a supply pressure (p_WD_zu) of the torque converter (2) and a supply pressure (p_WK_zu) of the torque converter lockup clutch (2). The torque converter lockup clutch (2) is engaged when the supply pressure (p_WD_zu) of the torque converter (1) is lower than a predefined pressure level of the supply pressure (p_WK_zu) of the torque converter lockup clutch. A converter pressure valve (WDV) is provided for controlling the supply pressure (p_WD_zu) of the torque converter (1), and a converter coupling valve (WKV) for controlling the supply pressure (p_WK_zu) of the torque converter lockup clutch, where their valve slides (WDV_S, WKV_S) can be acted upon by at least one pre-control pressure (p_VS) and one system pressure (p_sys). When the torque converter lockup clutch (2) is disengaged, the valve slide (WKV_S) of the converter coupling valve (WKV) is acted upon in such a way on an active surface (15) by the reverse pressure (p_WD_ab) of the torque converter (1), and when the torque converter lockup clutch (2) is engaged, is acted upon in such a way on the active surface (15) by the reverse pressure (p_WK_zu) of the torque converter lockup clutch (2), that at least either the supply pressure (p_WD_zu) of the torque converter (1) or the supply pressure (p_WK_zu) of the torque converter lockup clutch (2) is higher than a predefined pressure level (p—0) over the entire operational area of the torque converter (1).
REFERENCES:
patent: 4603601 (1986-08-01), Nishikawa et al.
patent: 4640396 (1987-02-01), Nishimura
patent: 4880090 (1989-11-01), Ando
patent: 5549184 (1996-08-01), Löffler et al.
patent: 5934427 (1999-08-01), Takagi
patent: 39 37 976 (1990-05-01), None
patent: 42 03 322 (1992-08-01), None
Gierer Georg
Rolser Tobias
Schmidt Thilo
Bonck Rodney H
Davis & Bujold P.L.L.C.
ZF Friedrichshafen AG
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