Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Impeller-turbine type fluid circuit in series with planetary...
Patent
1997-10-23
1999-05-25
Wright, Dirk
Planetary gear transmission systems or components
Fluid drive or control of planetary gearing
Impeller-turbine type fluid circuit in series with planetary...
475118, 475120, 477158, 477175, F16H 6114
Patent
active
059065567
ABSTRACT:
A line pressure control apparatus of an automatic transmission controls the line pressure of the automatic transmission under a lockup condition to ensure an engagement capacity and an amount of lubrication oil for an engaged friction element under a high vehicle speed condition. The line pressure control apparatus comprises a line pressure lowering section, a vehicle speed deciding section and a pressure changing section. The pressure lowering section lowers a line pressure under a lockup condition of the automatic transmission. The vehicle speed deciding section decides whether a vehicle speed of the automotive vehicle is higher than a predetermined value. The pressure changing section changes the line pressure under the lockup condition from the lowered line pressure to a line pressure under a normal condition when the vehicle speed is higher than the predetermined value.
REFERENCES:
patent: 4431096 (1984-02-01), Kobayashi et al.
patent: 4651593 (1987-03-01), Aoki et al.
patent: 4981053 (1991-01-01), Yamaguchi
patent: 5093789 (1992-03-01), Yoshimura et al.
patent: 5191815 (1993-03-01), Kouta
patent: 5311795 (1994-05-01), Yoshimura et al.
patent: 5339935 (1994-08-01), Ishii et al.
patent: 5527233 (1996-06-01), Tabata et al.
patent: 5634869 (1997-06-01), Mikami et al.
patent: 5641043 (1997-06-01), Niiyama
patent: 5733223 (1998-03-01), Matsubara et al.
Harada Chiaki
Sakai Hiromasa
Takatori Kazuhiro
Kwon Peter T.
Nissan Motor Co,. Ltd.
Wright Dirk
LandOfFree
Line pressure control apparatus of automatic transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Line pressure control apparatus of automatic transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Line pressure control apparatus of automatic transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-398786