Electric pump actuator, stepless transmission with electric pump actuator and control method for an electric pump actuator

An electric pump actuator for a continuously variable transmission comprising:

• a gear wheel pump comprising:
• a first gear wheel;
• and
• a second gear wheel meshing with the first gear wheel;
• a first electric motor for actuating the first gear wheel;
• a second electric motor for actuating the second gear wheel independent of the first gear wheel;
• and
• an electronic control unit arranged to:
• control the first electric motor to transmit a first torque to the first gear wheel;
• and
• control the second electric motor to transmit a second torque to the second gear wheel that is set against the first torque in at least one rotation angle range.

A control method for an electric pump actuator comprising:

• providing a gear wheel pump comprising:
• a first gear wheel driven by a first electric motor;
• a second gear wheel driven by a second electric motor;
• and
• an electronic control unit for controlling the first electric motor and the second electric motor;
• applying a first torque to the first electric motor with the electronic control unit;
• and
• applying a second torque to the second electric motor with the electronic control unit, wherein a first torque vector of the first torque points in a same direction as a second torque vector of the second torque.