System for determining the gear ratio changes for an automatic t

Details System for determining the gear ratio changes for an automatic t System for determining the gear ratio changes for an automatic t

1997-03-26

2000-01-04

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

Transmission control

701 58, 477905, G06F 1700, F16H 6102

Patent

active

060120096

ABSTRACT:
The invention proceeds from a system for determining the changes in gear ratio for an automatic transmission of a vehicle. In the system, at least two different pregiven associations (shift programs) are selected in dependence upon the detected vehicle speed and the detected accelerator pedal position. The selection of these associations (shift program) takes place with the aid of a specific adaptation quantity. The essence of the invention is in the determination of this adaptation quantity and therefore in the selection of the different shift programs. According to the invention, the selection of the associations or shift programs takes place in such a manner that one of the two associations is set as the base adjustment, that is, as the base shift program. The other association, or in the case of several alternative associations, the other associations are set for only a specific time duration. After this time duration has elapsed, the system of the invention automatically returns to the base setting.

REFERENCES:
patent: 5069084 (1991-12-01), Matsuno et al.
patent: 5157609 (1992-10-01), Stehle et al.
patent: 5688207 (1997-11-01), Uchida et al.
patent: 5878364 (1999-03-01), Kuroda et al.
"Die Adaptive Getriebesteuerung fur die Automatikgetriebe der BMW Fahrzeuge mit Zwolfzylindermotor" by A. Welter et al, ATZ Automobiltechnische.
"Die Adaptive Getriebesteuerung fur BMW-Automobile" by A. Welter et al, ATZ Automobiltechnische Zeitschrift 95 (1993) 9, pp. 420 to 434.

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