Method and apparatus for controlling automatic gear-change processes of an electric gear-change apparatus of a bicycle

Patent metadata

Field	Value
Publication number	US-10086906-B2
Application number	US-201614995529-A
Country	US
Kind code	B2
Filing date	Jan 14, 2016
Priority date	Jan 14, 2015
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

Controlling automatic gear-changing of an electric gear-change apparatus of a bicycle, the method may involve assigning each of a plurality of gears of the bicycle a predetermined gearing range. Controlling the process may also involve assigning a predetermined lower limit value and a predetermined upper limit value to each gearing range, wherein the upper limit value of a gearing range is in each case larger by a predetermined value than the lower limit value of a next higher gearing range, and the upper limit value of the gearing range and the lower limit value of the next higher gearing range define between them an overlap range. Controlling the process may also involve selecting an engagement of either a gear or a next higher gear in the overlap range depending on a speed profile of the bicycle.

First claim

The invention claimed is:

1. A method for controlling automatic gear-changing of an electric gear-change apparatus of a bicycle, the method comprising:
assigning, to a memory of a control device, each of a plurality of gears of the bicycle a predetermined gearing range;
assigning, to the memory of the control device, a predetermined lower limit value and a predetermined upper limit value to each gearing range, wherein the upper limit value of a gearing range is in each case larger by a predetermined value than the lower limit value of a next higher gearing range, and the upper limit value of the gearing range and the lower limit value of the next higher gearing range define between them an overlap range;
selecting, with the control device, an engagement of either a gear or a next higher gear in the overlap range depending on a speed profile of the bicycle;
assigning, to the memory of the control device, a speed at which a gear-change operation takes place as a changeover speed of the gear-change operation; and
determining, with the control device, a type of gear-change operation depending on the changeover speed, wherein determining the type of gear-change operation further depends on whether a most recent gear-change operation was an upward change or a downward change.

2. The method of claim 1 , further comprising:
changing, with the control device, from an active gear into the next higher gear relative to the active gear when a second speed of the bicycle exceeds a lower limit value of the next higher gearing range.

3. The method of claim 1 , further comprising:
changing, with the control device, from an active gear into a next lower gear to the active gear when a second speed falls below an upper limit value of a next lower gearing range.

4. The method of claim 1 , further comprising:
making a second upward change when the most recent gear-change operation was the upward change and a second speed exceeds a lower limit value of the gearing range.

5. The method of claim 1 , further comprising:
making a second downward change when the most recent gear-change operation was the downward change and a second speed falls below an upper limit value.

6. The method of claim 1 , wherein the determining the type of gear-change operation further comprises:
determining, with the control device, whether a second speed after the changeover speed rises or falls by a value that is greater than or equal to a predetermined threshold value.

7. The method of claim 1 , wherein the upward change is made if:
the most recent gear-change operation was the downward change into an active gear,
a second speed is higher than the changeover speed at least by a predetermined threshold value, and
the second speed is higher than the lower limit value of the next higher gearing range.

8. The method of claim 1 , wherein the downward change is made if:
the most recent gear-change operation was the upward change into an active gear,
a second speed is lower than the changeover speed at least by a predetermined threshold value, and
The second speed is lower than the upper limit value of a next lower gearing range.

9. The method of claim 1 , wherein the speed is detected, with a speed detecting unit, continuously or at predetermined sequential time points.

10. The method of claim 9 , wherein the profile of the speed is stored to the memory of the control unit as the speed profile of the bicycle.

11. The method of claim 1 , wherein each gearing range corresponds to a predetermined range of speeds.

12. The method of claim 1 , wherein the type of the gear-change operation is detected by at least one detection unit.

13. The method of claim 1 , further comprising:
storing at least the type of the most recent gear-change operation and the changeover speed assigned to the most recent gear-change operation.

14. The method of claim 1 , wherein the changing from an active gear into the next higher gear to the active gear comprises changing from the active gear of a derailleur system or a gear hub into the next higher gear to the active gear of the derailleur system or the gear hub.

15. The method of claim 1 , wherein the speed profile is a measure of a development of speed of the bicycle over time.

16. A control apparatus for controlling automatic gear-changing of a derailleur system or a gear hub of a bicycle, the control apparatus comprising:
a gearing range assignment unit that is configured to assign, to a memory of the control apparatus, a predetermined gearing range to each gear,
a limit range assignment unit that is configured to assign a predetermined lower limit value and a predetermined upper limit value to each of the gearing ranges to the memory, wherein the limit range assignment unit is configured to assign the limit values such that the upper limit value of the predetermined gearing range is in each case greater by a predetermined value than the lower limit value of a next higher gearing range, so that the upper limit value of the predetermined gearing range and the lower limit value of the next higher gearing range define between them an overlap range,
a speed detection unit for detecting a speed of the bicycle, and
a gear detection unit that is configured to determine whether a gear or a next higher gear can be engaged in the overlap range, depending on a speed profile and whether a most recent gear-change operation was an upward change or a downward change.

17. The control apparatus of claim 16 , further comprising:
a changeover unit that assigns, to the memory, a changeover speed to the most recent gear-change operation.

18. The control apparatus of claim 17 , further comprising:
a determination unit that is configured to determine whether the speed after the changeover speed rises or falls by a value that is greater than or equal to a predetermined threshold value.

19. The control apparatus of claim 16 , further comprising:
a detection unit that is configured to detect a type of a gear-change operation.

20. A method for controlling automatic gear-changing of an electric gear-change apparatus of a bicycle, the method comprising:
assigning, to a memory of a control device, each of a plurality of gears of the bicycle a predetermined gearing range;
assigning, to the memory of the control device, a predetermined lower limit value and a predetermined upper limit value to each gearing range, wherein the upper limit value of a gearing range is in each case larger by a predetermined value than the lower limit value of a next higher gearing range, and the upper limit value of the gearing range and the lower limit value of the next higher gearing range define between them an overlap range;
selecting, with the control device, an engagement of either a gear or a next higher gear in the overlap range depending on a speed profile of the bicycle; and
determining, with the control device, a type of gear-change operation depending on whether a most recent gear-change operation was an upward change or a downward change.

Assignees

• Sram De Gmbh
• Sram Llc

Inventors

• Baumann Sven
• Schmittfull Egon
• Seufert Uwe

Classifications

• F16H59/44

  dependent on machine speed {, e.g. the vehicle speed} (F16H59/46 takes precedence) · CPC title

• F16H59/70

  dependent on the ratio established · CPC title

• B62M9/122

  electrically or fluid actuated; Controls thereof · CPC title

• B62M11/16

  built in, or adjacent to, the ground-wheel hub · CPC title

• B62M9/06

  using a single chain, belt, or the like · CPC title