US 12,344,349 B2
Method for changing a transmission ratio of a gearing of a bicycle, computer program, controller, drive unit, and bicycle
Christian Reisige, Tuebingen (DE); Marcus Boege, Dusslingen (DE); Thomas Mattes, Eningen Unter Achalm (DE); Merlin Martin Manewald, Reutlingen (DE); and Daniel Baumgaertner, Neustetten (DE)
Assigned to Robert Bosch GmbH, Stuttgart (DE)
Appl. No. 18/556,724
Filed by Robert Bosch GmbH, Stuttgart (DE)
PCT Filed Apr. 8, 2022, PCT No. PCT/EP2022/059415
§ 371(c)(1), (2) Date Oct. 23, 2023,
PCT Pub. No. WO2022/228867, PCT Pub. Date Nov. 3, 2022.
Claims priority of application No. 10 2021 204 352.6 (DE), filed on Apr. 30, 2021.
Prior Publication US 2024/0199170 A1, Jun. 20, 2024
Int. Cl. B62M 25/08 (2006.01); B62J 45/411 (2020.01); B62J 45/413 (2020.01); B62J 45/414 (2020.01); B62J 45/415 (2020.01)
CPC B62M 25/08 (2013.01) [B62J 45/411 (2020.02); B62J 45/413 (2020.02); B62J 45/414 (2020.02); B62J 45/4151 (2020.02)] 16 Claims
OG exemplary drawing
 
1. A method for changing a transmission ratio of an electrically controllable gearing of a bicycle, comprising:
measuring a pedaling frequency of a bicycle rider of the bicycle on a pedal shaft of the bicycle,
measuring a pedaling force of the bicycle rider, and
determining a gear change operating state based on the measured pedaling frequency and based on the measured pedaling force if:
i. the measured pedaling frequency is:
a. less than or equal to a lower frequency threshold value, or
b. greater than or equal to an upper frequency threshold value, and/or
ii. the measured pedaling force is:
a. less than or equal to a lower force threshold value, or
b. greater than or equal to an upper force threshold value,
wherein, after the determining the gear change operating state, the method includes (i) generating a control signal for the gearing according to the determined gear change operating state, and (ii) determining a shift command for the gearing,
wherein the generating the control signal for the gearing is additionally performed based on the determined shift command,
wherein prior to the generating the control signal the method includes:
determining an expected rider torque and/or an expected pedaling frequency for a future transmission ratio based on the measured pedaling force of the bicycle rider and/or the measured pedaling frequency and based on a current motor torque and based on the current transmission ratio and the future transmission ratio, and
determining the shift command additionally based on the expected rider torque and/or the expected pedaling frequency, wherein, the shift command is determined only if the expected rider torque is between the lower and upper force threshold values, and/or the expected pedaling frequency is between the lower and upper frequency threshold values.