Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Transmission control
Patent
1997-11-27
1998-10-13
Zanelli, Michael
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Transmission control
701 57, 477109, B60K 4106, F16H 5938
Patent
active
058227083
ABSTRACT:
A control device for an automatic motor vehicle transmission reduces engine torque during a shifting operation, in particular a shifting operation in a traction mode, in order to increase smoothness of shifting. The engine torque reduction is begun at the earliest upon reaching a free-wheel point of the transmission and is ended shortly before a synchronizing point of the transmission is reached. The free-wheel point and the synchronizing point of the transmission are ascertained from rpm differences in the gearshift elements involved in the particular switching operation. Differential rpm thresholds used in the process and the intensity of the torque reduction are ascertained with fuzzy systems.
REFERENCES:
patent: 4355550 (1982-10-01), Will et al.
patent: 4360092 (1982-11-01), Muller et al.
patent: 4770064 (1988-09-01), Kuerschner
patent: 4823266 (1989-04-01), Baltusis et al.
patent: 5072631 (1991-12-01), Fujimoto et al.
patent: 5119696 (1992-06-01), Yamaguchi
patent: 5261296 (1993-11-01), Ramm
patent: 5307270 (1994-04-01), Graf
patent: 5335568 (1994-08-01), Kammerl et al.
patent: 5491775 (1996-02-01), Madau et al.
patent: 5559694 (1996-09-01), Kraemer et al.
patent: 5580331 (1996-12-01), Shiraishi et al.
Graf Friedrich
Ulm Michael
Wagner Thomas
Greenberg Laurence A.
Lerner Herbert L.
Siemens Aktiengesellschaft
Zanelli Michael
LandOfFree
Controller for an automatic motor vehicle 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 Controller for an automatic motor vehicle transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controller for an automatic motor vehicle transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-326733