Velocity-based control methods for a rotary disconnect system
AssigneeHUSCO Automotive Holdings LLC
InventorsTrevor Wynkoop, Matthew Pellmann
Life of this patent
Estimating the term…
Abstract
A disconnect system for selectively coupling or disconnecting a drive member and a driven member. The disconnect system includes a clutch ring rotationally coupled to a drive member, a solenoid actuator, and a clutch ring configured to be moved by the solenoid actuator to selectively transition the clutch ring between an engaged position where the clutch ring is rotationally coupled to a driven member and a disengaged position where the clutch ring is disconnected from the driven member. A controller can be provided to control the axial velocity of the clutch ring (e.g., relative to the rotational axis thereof) to reduce unwanted noise, vibrations, or harshness that can occur during the transition between engaged and disengaged positions.
Claims18
A rotary disconnect system for selectively coupling a drive member and a driven member, the rotary disconnect system comprising:
- a clutch ring rotationally coupled to the drive member;
- a solenoid actuator adapted to move the clutch ring between an engaged position, in which the clutch ring is rotationally coupled to the driven member, and a disengaged position, in which the clutch ring is rotationally decoupled from the driven member;
- a sensor configured to detect an actuation position of the solenoid actuator, wherein the actuation position of the solenoid actuator is indicative of an axial position of the clutch ring;
- and
- a controller in communication with the solenoid actuator and the sensor, the controller configured to:
- receive, from the sensor, the actuation position of the solenoid actuator;
- determine a target axial velocity for the clutch ring based on the actuation position of the solenoid actuator received from the sensor;
- determine a first current for applying to the solenoid actuator based on the target axial velocity;
- determine a second current for applying to the solenoid actuator by applying the actuation position of the solenoid actuator received from the sensor as input to a lookup table, wherein the second current mitigates latch forces on the solenoid actuator, and wherein the lookup table correlates the actuation position of the solenoid actuator to a magnitude for the second current;
- and
- provide a current command to the solenoid actuator based on the first current and the second current to cause the solenoid actuator to move the clutch ring in accordance with the target axial velocity.
A method of controlling a rotary disconnect mechanism, comprising:
- determining a position of a clutch ring that is rotationally coupled to a drive member in the rotary disconnect mechanism based on data received from a sensor, wherein:
- the clutch ring is configured to be moved between an engaged position, in which the clutch ring is rotationally coupled to a driven member, and a disengaged position, in which the clutch ring is rotationally decoupled from the driven member, by a solenoid actuator;
- the sensor is configured to detect an actuation position of the solenoid actuator, the actuation position of the solenoid actuator indicative of the position of the clutch ring;
- determining a target axial velocity for the clutch ring based on the position of the clutch ring;
- determining a first current for applying to the solenoid actuator based on the target axial velocity;
- determining a second current for applying to the solenoid actuator by applying the position of the clutch ring as input to a lookup table, wherein the second current mitigates latch forces on the solenoid actuator, and wherein the lookup table correlates the position of the clutch ring to a magnitude for the second current;
- and
- providing an excitation command to the solenoid actuator based on the first current and the second current to cause the solenoid actuator to move the clutch ring in accordance with the target axial velocity.
Dependencies are inferred from the claim text.