Pedally propelled vehicle gear system and method for operating such
AssigneeMont Invest 30 AS
InventorsKnut Tore Ljøsne, Jakob Deraas Grimsgaard, Daniel Preining
Life of this patent
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Abstract
A system and method for operating a pedally propelled vehicle gear system, includes a multi-speed gear configured to provide varying gear ratios between a gear input element and a gear output element, wherein the method includes receiving a shift control signal indicating that a gear shift should be performed, providing a boost control signal to the motor to run at a boost torque bT for a boost torque time period tbT, providing a dip control signal 154 to the motor to run at a dip torque dT for a dip torque time period tdT, wherein the boost torque is higher than the dip torque.
Claims20
A computer-implemented method for operating a pedally propelled vehicle gear system, the gear system including a multi-speed gear configured to provide varying gear ratios between a gear input element and a gear output element, a crank drive configured to transmit torque to the gear input element, a motor drive configured to transmit torque to the gear input element, and a movable shift element configured to shift the multi-speed gear between the gear ratios, the method comprising:
- receiving a shift control signal indicating that a gear shift should be performed;
- providing a boost control signal to the motor drive to run at a boost torque bT for a boost torque time period tbT;
- and
- providing a dip control signal to the motor drive to run at a dip torque dT for a dip torque time period tdT, the boost torque being higher than the dip torque,
- wherein the gear system has a Current Shift Torque Threshold (STT) defined as the maximum allowable torque between the gear input element and the gear output element at which a shift of gear ratio in the multi-speed gear is able to be performed.
A computer-implemented method for operating a pedally propelled vehicle gear system, the gear system including a multi-speed gear configured to provide varying gear ratios between a gear input element and a gear output element, a crank drive configured to transmit torque to the gear input element, a motor drive configured to transmit torque to the gear input element, and a movable shift element configured to shift the multi-speed gear between the gear ratios, the method comprising:
- receiving a shift control signal indicating that a gear shift should be performed;
- providing a boost control signal to the motor drive to run at a boost torque bT for a boost torque time period tb, after receiving the shift control signal;
- providing a dip control signal to the motor drive to run at a dip torque dT for a dip torque time period tdT, the boost torque being higher than the dip torque, after providing the boost control signal to cause a total torque across the multi-speed gear to drop below a Current Shift Torque Threshold (STT) defined as the maximum allowable torque between the gear input element and the gear output element at which a shift of gear ratio in the multi-speed gear is able to be performed;
- and
- performing the gear shift when the total torque drops below the Current STT.
Dependencies are inferred from the claim text.