System for adjusting a transmission ratio in a transmission built into a motor vehicle

• US 6,592,493 B2
• Filed: 12/29/2000
• Issued: 07/15/2003
• Est. Priority Date: 12/29/1999
• Status: Expired due to Fees

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Hermsen, Wolfgang, Loeffler, Juergen, Huelser, Holger, Bolz, Martin-Peter, Frei, Rasmus, Poljansek, Marko, Steiger-Pischke, Andrea
• Primary Examiner(s): Bonck, Rodney H.
• Assistant Examiner(s): Le, David D.
• Application Number:
  US09/750,060
• Publication Number:
  US 20010006923A1
• Time in Patent Office: 928 Days
• Field of Search: 477/115, 477/107, 477/78, 477/77, 701/51, 701/54, 701/55, 701/56, 701/58, 701/59
• US Class Current: 477/115
• CPC Class Codes: F16H 61/0213 characterised by the method for generating shift signals

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.

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.

2. The system of claim 1, wherein at least one transmission ratio criterion (UL) contains at least two shift characteristic lines which can be distinguished via pregivable codes.

3. The system of claim 1, wherein the transmission ratio criterion (UL) and the first means (driveprog_stat) for transmitting the first transmission ratios (u_vor) communicate via a criterion administration.

4. The system of claim 3, wherein the first means (driveprog_stat) communicates by means of the criterion administrator via pregivable identification codes (ID).

5. The system of claim 1, further comprising:

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.