Control method and unit of an electric traction motorcycle according to the position of an accelerator grip

A control unit for an electric traction motorcycle comprising:

• an accelerator grip pivotally mounted to rotate in a first rotation direction about a rotation axis from a neutral position (N) towards a maximum acceleration position (A), and in a second rotation direction opposite to the first rotation direction and about the rotation axis away from the neutral position (N) towards a deceleration position (D) arranged in a direction opposite to the maximum acceleration position (A);
• an elastic member to bias the accelerator grip toward the neutral position (N);
• at least one position sensor to detect the angular position (α) of the accelerator grip about the rotation axis;
• and
• a control device which drives an electric machine as a motor for generating a varying driving torque (T) when the accelerator grip is between the neutral position (N) and the maximum acceleration position (A) and the value of the driving torque (T) varies according to the angular position (α) of the accelerator grip
• wherein the control device drives the electric machine as a generator for absorbing a mechanical torque (T) that brakes the motorcycle when the accelerator grip is in the neutral position (N);
• and
• wherein the control device switches off the electric machine to eliminate the braking of the motorcycle when the accelerator grip is in the deceleration position (D).

A control unit for an electric traction motorcycle comprising:

• an accelerator grip pivotally mounted to rotate in a first rotation direction about a rotation axis from a neutral position (N) towards a maximum acceleration position (A), and in a second rotation direction opposite to the first rotation direction and about the rotation axis away from the neutral position (N) towards a deceleration position (D)
• a biasing member to move the accelerator grip toward the neutral position (N);
• at least one position sensor to detect the angular position (α) of the accelerator grip about the rotation axis;
• and
• a control device which drives an electric machine as a motor for generating a varying driving torque (T) when the accelerator grip is between the neutral position (N) and the maximum acceleration position (A), which drives the electric machine as a generator for absorbing a mechanical torque (T) that brakes the motorcycle when the accelerator grip is in the neutral position (N), and which switches off the electric machine to eliminate the braking of the motorcycle when the accelerator grip is in a selected position, and
• wherein the value of the mechanical torque (T) absorbed by the electric machine operating as a generator when the accelerator grip is in the neutral position (N) is set close to the value of the mechanical torque (T) required for sustaining an internal combustion thermal engine of the type of those which may be installed in the motorcycle in a cut-off mode.