Patent ID: 11912119
Assignee: DANA BELGIUM N.V.
Field: Transport (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 18:
19. A control method for controlling a dual-motor electrical transmission for an electric vehicle to perform a gear shift in a second gear arrangement from a first gear to a second gear, the transmission comprising:
a first and a second electric motor for driving the vehicle;
a first gear arrangement, the second gear arrangement, and a summation box, wherein
the first gear arrangement comprises a first gear arrangement first shaft and at least the first gear and the second gear, wherein each of the first and the second gears can be selectively engaged and disengaged with the first gear arrangement first shaft via a first and second clutch element, and the first gear arrangement is configured to supply a first torque from the first electric motor via one of the first and second gears to the summation box;
the second gear arrangement comprises a second gear arrangement first shaft and at least a second gear arrangement first gear, wherein the second gear arrangement first gear can be engaged and disengaged with the second gear arrangement first shaft via a second gear arrangement first clutch element, the second gear arrangement is configured to supply a second torque from the second electric motor to the summation box, and the second gear arrangement includes a second gear arrangement second gear which can be engaged or disengaged with the second gear arrangement first shaft via a second gear arrangement second clutch element; and
the summation box is configured to combine the first and second torques and to output a combined output torque,
the method comprising:
controlling the first electric motor to synchronize with the first gear arrangement first gear,
controlling the first clutch element to engage with the first gear arrangement first shaft,
controlling the second electric motor to reduce the second torque to zero, and simultaneously controlling the first electric motor to increase the first torque such that the combined output torque is constant,
controlling the first clutch element to disengage from the second gear arrangement first shaft,
controlling the second electric motor to synchronize with the second gear arrangement second gear,
controlling the second gear arrangement second clutch element to engage with the second gear arrangement first shaft,
controlling the first electric motor to decrease the first torque, and simultaneously controlling the second electric motor to increase the second torque such that the combined output torque is constant.