System for adjusting a transmission ratio in a transmission built into a motor vehicle
First Claim
1. A system for adjusting a transmission ratio in a transmission built into a motor vehicle, the system comprising:
- at least two transmission ratio criteria (UL) by means of which a first plurality of transmission ratios (u_vor) are determined on the basis of at least two different determination modes;
first means (driveprog_stat) by means of which a second transmission ratio (u_vor, UL) is selected in accordance with a pregivable prioritization (tab_UL) from the determined first plurality of transmission ratios (u_vor) in that said transmission ratio criteria (UL) are processed in accordance with a priority sequence starting with the transmission ratio criterion of the highest priority until a transmission ratio criterion is found which has determined a transmission ratio, said priority sequence being fixed by said pregivable prioritization (tab_UL); and
, the transmission ratio is then adjusted in dependence upon the so selected second transmission ratio.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention is directed to a system for adjusting a transmission ratio in a transmission built into a motor vehicle. The system includes at least two transmission ratio criteria with which first transmission ratios are determined based on at least two different determining modes. The system also includes a first arrangement with the aid of which a second transmission ratio is selected in accordance with a pregiven prioritization from the determined first transmission ratios. The transmission ratio is then adjusted in dependence upon the selected second transmission ratio. In an advantageous configuration of the invention, a second arrangement is provided with which the second transmission ratio is modified in accordance with a pregiven strategy. The transmission ratio is then adjusted in dependence upon the modified second transmission ratio.
-
Citations
8 Claims
-
1. A system for adjusting a transmission ratio in a transmission built into a motor vehicle, the system comprising:
-
at least two transmission ratio criteria (UL) by means of which a first plurality of transmission ratios (u_vor) are determined on the basis of at least two different determination modes;
first means (driveprog_stat) by means of which a second transmission ratio (u_vor, UL) is selected in accordance with a pregivable prioritization (tab_UL) from the determined first plurality of transmission ratios (u_vor) in that said transmission ratio criteria (UL) are processed in accordance with a priority sequence starting with the transmission ratio criterion of the highest priority until a transmission ratio criterion is found which has determined a transmission ratio, said priority sequence being fixed by said pregivable prioritization (tab_UL); and
,the transmission ratio is then adjusted in dependence upon the so selected second transmission ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
second means (driveprog_dyn) by means of which the second transmission ratio (transmission(u_vor, UL)) is modified in accordance with a pregivable strategy (TAB_xSV); and
,the transmission ratio is adjusted in dependence upon the modified second transmission ratio.
-
-
6. The system of claim 5, wherein:
-
a change (HSV, RSV, DHSV, DRSV) of the adjusted transmission ratio is determined with said second means (driveprog_dyn) in dependence upon the instantaneous adjusted transmission ratio and the selected second transmission ratio (transmission(u_vor, UL));
a check is made in accordance with a pregiven strategy (Tab_xSV) as to whether said change (HSV, RSV, DHSV, DRSV) of said adjusted transmission ratio is permissible; and
,an adjustment of the transmission ratio in accordance with the said change (HSV, RSV, DHSV, DRSV) is only then undertaken when this change is permissible.
-
-
7. The system of claim 6, wherein the modification or the check of the reliability of the change takes place in dependence upon the transmission ratio criterion (UL) which forms the selected second transmission ratio (transmission(u_vor, UL)).
-
8. The system of claim 6, wherein said change (HSV, RSV, DHSV, DRSV) is at least one of the following:
- an upshift operation, downshift operation, double upshift operation, double downshift operation, pregivable multiple upshift operations and pregivable multiple downshift operations.
Specification