METHOD FOR SWITCHING A GEAR RATIO OF A SWITCHABLE TRANSMISSION, CONTROL UNIT AND VEHICLE
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- ROBERT BOSCH GMBH
- Filing Date
- 2021-10-26
- Publication Date
- 2026-07-02
AI Technical Summary
Existing gear shifting methods in vehicles with drive motors, particularly electric bicycles, result in unpleasant jerking and speed reduction due to torque interruptions during gear changes, especially on steep terrain, leading to potential accidents.
A method for switching gear ratios in a switchable transmission that involves reducing motor torque temporarily, generating motor torque pulses during the shift, and adjusting these pulses based on detected rider inputs and pedal positions to maintain power assistance and smooth gear changes.
This approach minimizes jerking and ensures reliable gear changes by maintaining average torque, providing power assistance and preventing speed reductions, even on steep inclines, while allowing for shorter shift durations.