Control algorithm and intrusive state-detection diagnostic for sensorless driveline disconnect
AssigneeRivian IP Holdings, LLC
InventorAravind Arun
Life of this patent
Estimating the term…
Abstract
A sensorless clutch state feedback method is provided including a driveline disconnect. To engage the sensorless disconnect, respective speeds of a motor assembly and the sensorless disconnect are synchronized to within a speed delta threshold of each other, a control system facilitates the engagement of the motor assembly and the sensorless disconnect, and the control system determines the success of the engagement by the motor speed response of the motor assembly (e.g., whether the presence of a load is detected).
Claims22
A method for engaging a driveline disconnect associated with a vehicle, comprising:
- determining a target motor speed based on a wheel speed and a speed delta;
- controlling, via a control system associated with the vehicle, a motor speed, associated with a motor assembly, to achieve the target motor speed;
- facilitating, via the control system, an engagement of the driveline disconnect to couple the motor assembly with a corresponding wheel;
- monitoring, via the control system, the motor speed, associated with the motor assembly, in response to the engagement of the driveline disconnect;
- and
- determining, via the control system, that the engagement of the driveline disconnect is successful based on a motor speed response.
A system for engaging a driveline disconnect associated with a vehicle, comprising:
- a motor;
- a sensorless disconnect;
- and
- processing circuitry configured to:
- determine a target motor speed based on a wheel speed and a speed delta;
- control a motor speed, associated with a motor assembly, to achieve the target motor speed;
- facilitate an engagement of the sensorless disconnect to couple the motor assembly with a corresponding wheel;
- monitor the motor speed, associated with the motor assembly, in response to the engagement of the sensorless disconnect;
- and
- determine that the engagement of the sensorless disconnect is successful based on a motor speed response.
A vehicle, comprising:
- a first motor coupled to a first wheel via a first disconnect;
- a second motor coupled to a second wheel via a second disconnect;
- and
- processing circuitry configured to:
- determine a target motor speed based on a wheel speed and a speed delta;
- control a motor speed of the first or the second motor to achieve the target motor speed;
- facilitate an engagement of the first or the second disconnect to couple the first motor with the first wheel or the second motor with the second wheel;
- monitor the motor speed of the first or the second motor in response to the engagement of the first or the second disconnect;
- and
- determine that the engagement of the first or the second disconnect is successful based on a motor speed response.
Dependencies are inferred from the claim text.