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US 12,110,961 B2Granted
Transmission system for an electric vehicle
AssigneeKarma Automotive LLC
InventorShashank Vijay
Life of this patent
Estimating the term…
Abstract
A transmission system for an electric vehicle. The system includes a gearbox containing gears and a lubricating fluid. A pump is provided for supplying and removing lubricating fluid from the gear box. The operation of the pump is controlled by a controller. A reservoir is provided for storing lubricating fluid. The controller is configured to control the pump so that a portion of the lubricating fluid is removed from the gear box when the vehicle is involved in a high acceleration event.
Claims18
A method comprising:
- receiving sensor information from a motor speed sensor of a vehicle, the sensor information representing a motor speed of an electric motor of the vehicle, the vehicle including a transmission that comprises:
- a gearbox containing a volume of lubricating fluid;
- and
- a pump fluidly connected to the gearbox;
- determining a current acceleration of the vehicle based on the received sensor information representing the motor speed of the electric motor of the vehicle;
- determining that the current acceleration of the vehicle is greater than a first predetermined acceleration level;
- and
- in response to determining that the current acceleration of the vehicle is greater than the first predetermined acceleration level, starting operation of the pump to remove a portion of the volume of lubricating fluid from the gearbox, wherein the pump continuously operates while the current acceleration of the vehicle is greater than the first predetermined acceleration level.
5 more elements
A vehicle comprising:
- a transmission comprising:
- a gearbox containing a volume of lubricating fluid;
- and
- a pump fluidly connected to the gearbox;
- an electric motor;
- a motor speed sensor;
- and
- a controller in communication with the motor speed sensor and the transmission, the controller performing operations comprising:
- receiving sensor information from the motor speed sensor, the sensor information indicating a motor speed of the electric motor;
- determining a current acceleration of the vehicle based on the received sensor information representing the motor speed of the electric motor;
- determining that the current acceleration of the vehicle is greater than a first predetermined acceleration level;
- and
- in response to determining that the current acceleration of the vehicle is greater than the first predetermined acceleration level, starting operation of the pump to remove a portion of the volume of lubricating fluid from the gearbox, wherein the pump continuously operates while the current acceleration of the vehicle is greater than the first predetermined acceleration level.
10 more elements
Dependencies are inferred from the claim text.