Control device and transmission system

Patent metadata

Field	Value
Publication number	US-11518475-B2
Application number	US-202016901570-A
Country	US
Kind code	B2
Filing date	Jun 15, 2020
Priority date	Jul 8, 2019
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A control device includes an electronic controller configured to control a transmission to shift a transmission ratio of a human-powered vehicle in accordance with a first shifting condition set based on a first reference value. The electronic controller is configured to control the transmission to restrict shifting of the transmission ratio of the human-powered vehicle regardless of the first shifting condition upon determining a second shifting condition set based on a second reference value is satisfied. The second reference value includes at least one of a reference value indicating an acceleration tendency of the human-powered vehicle and a reference value indicating a deceleration tendency of the human-powered vehicle.

First claim

What is claimed is:

1. A control device comprising:
an electronic controller configured to control a transmission to shift a transmission ratio of a human-powered vehicle in accordance with a first shifting condition set based on a first reference value,
the electronic controller being configured to control the transmission to restrict shifting of the transmission ratio of the human-powered vehicle regardless of the first shifting condition upon determining a second shifting condition set based on a second reference value is satisfied, the electronic controller being configured to restrict shifting of the transmission ratio for as long as the second condition is satisfied, and
the second reference value including at least one of a reference value indicating an acceleration tendency of the human-powered vehicle and a reference value indicating a deceleration tendency of the human-powered vehicle.

2. The control device according to claim 1 , wherein
the second reference value includes the acceleration of the human-powered vehicle, and
the electronic controller is configured to determine that the second shifting condition is satisfied and restrict the shifting of the transmission ratio of the human-powered vehicle upon determining the acceleration of the human-powered vehicle is greater than or equal to a first predetermined value.

3. The control device according to claim 2 , wherein
the electronic controller is configured to determine that the second shifting condition is satisfied and is configured to restrict a first shifting that decreases the transmission ratio of the human-powered vehicle upon determining the acceleration of the human-powered vehicle is greater than or equal to the first predetermined value.

4. A control device comprising
an electronic controller configured to control a transmission to shift a transmission ratio of a human-powered vehicle in accordance with a first shifting condition set based on a first reference value,
the electronic controller being configured to control the transmission to restrict shifting of the transmission ratio of the human-powered vehicle regardless of the first shifting condition upon determining a second shifting condition set based on a second reference value is satisfied, and
the second reference value including at least one of a reference value indicating an acceleration tendency of the human-powered vehicle and a reference value indicating a deceleration tendency of the human-powered vehicle, the second reference value including the deceleration of the human-powered vehicle, and
the electronic controller being configured to determine that the second shifting condition is satisfied and is configured to restrict the shifting of the transmission ratio of the human-powered vehicle upon determining the deceleration of the human-powered vehicle is greater than or equal to a second predetermined value.

5. The control device according to claim 4 , wherein
the electronic controller is configured to determine that the second shifting condition is satisfied and is configured to restrict a second shifting that increases the transmission ratio of the human-powered vehicle upon determining the deceleration of the human-powered vehicle is greater than or equal to the second predetermined value.

6. The control device according to claim 1 , wherein
the first shifting condition includes a first threshold value and a second threshold value that is smaller than the first threshold value,
the electronic controller is configured to perform a second shifting that increases the transmission ratio of the human-powered vehicle upon determining the first reference value is greater than or equal to the first threshold value, and
the electronic controller is configured to perform a first shifting that decreases the transmission ratio of the human-powered vehicle upon determining the first reference value is less than or equal to the second threshold value.

7. The control device according to claim 1 , wherein
the second reference value differs from the first reference value.

8. The control device according to claim 1 , wherein
the first reference value includes at least one of a cadence, a torque acting on a crank of the human-powered vehicle, a power, and a vehicle speed of the human-powered vehicle.

9. The control device according to claim 8 , wherein
the first reference value includes the cadence, and
the electronic controller is configured to restrict a second shifting that increases the transmission ratio of the human-powered vehicle upon determining the cadence is greater than or equal to a third threshold value that is greater than the first threshold value.

10. The control device according to claim 8 , wherein
the first reference value includes the vehicle speed, and
the electronic controller is configured to calculate an estimated cadence of the human-powered vehicle from the vehicle speed.

11. The control device according to claim 10 , wherein
the first reference value further includes the cadence and the torque acting on the crank of the human-powered vehicle, and
the electronic controller is configured to determine whether or not the first shifting condition is satisfied based on the estimated cadence upon determining the torque is less than or equal to a third predetermined value.

12. The control device according to claim 1 , wherein
the electronic controller is configured to determine whether or not the first shifting condition is satisfied every predetermined period and is configured to shift the transmission ratio of the human-powered vehicle upon determining the first shifting condition is satisfied a predetermined number of times.

13. The control device according to claim 12 , wherein
the predetermined period is set by rotation of a crank of the human-powered vehicle.

14. The control device according to claim 12 , wherein
the predetermined number of times is three times.

15. A control device comprising
an electronic controller configured to control a transmission to shift a transmission ratio of a human-powered vehicle in accordance with a first shifting condition set based on a first reference value,
the electronic controller being configured to control the transmission to restrict shifting of the transmission ratio of the human-powered vehicle regardless of the first shifting condition upon determining a second shifting condition set based on a second reference value is satisfied, and
the second reference value including at least one of a reference value indicating an acceleration tendency of the human-powered vehicle and a reference value indicating a deceleration tendency of the human-powered vehicle, the second reference value including an acceleration of the human-powered vehicle, and
the electronic controller is configured to determine whether or not the second shifting condition is satisfied based on a plurality of accelerations of the human-powered vehicle calculated at predetermined intervals.

16. The control device according to claim 15 , wherein
the electronic controller is configured to determine that the second shifting condition is satisfied and is configured to restrict the shifting of the transmission ratio of the human-powered vehicle upon determining at least one of successive ones of the plurality of accelerations of the human-powered vehicle is greater than or equal to a first predetermined value.

17. The control device according to claim 1 , wherein
the second reference value includes a deceleration of the human-powered vehicle, and
the electronic controller is config

Assignees

• Shimano Kk

Inventors

• Shahana Satoshi
• Kawasaki Mitsuhiko

Classifications

• B62M6/55

  power-driven at crank shafts parts · CPC title

• B62M25/08

  with electrical or fluid transmitting systems · CPC title

• B62M9/132

  electrically or fluid actuated; Controls thereof · CPC title

• B62J45/20 Primary

  Cycle computers as cycle accessories · CPC title

• B62M9/122

  electrically or fluid actuated; Controls thereof · CPC title