Automatic backlash-compensation for a dog clutch in an electrified transmission
AssigneeDana Italia S.R.L.
InventorsSara Gennari, Mirko Brentari, Giacomo Faggiani, Pier Paolo Rinaldi
Life of this patent
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Abstract
A method for controlling an engagement of a dog clutch in an electrified drivetrain, comprising: locking a shaft of a transmission; positioning an actuator of the transmission at a prescribed position; commanding an electric machine to rotate at a speed; and updating the engagement threshold position when the electric machine stalls based on the prescribed position of actuator.
Claims19
A method for controlling an engagement of a dog clutch in an electrified drivetrain, comprising:
- locking a shaft of a transmission;
- positioning an actuator of the transmission at a prescribed position;
- commanding an electric machine to rotate at a selected speed;
- and
- updating an engagement threshold position when the electric machine stalls based on the prescribed position of the actuator.
A method for estimating a neutral threshold position of a dog clutch, comprising:
- locking a shaft of a transmission;
- positioning an actuator at a prescribed position;
- commanding an electric machine to rotate at a selected speed;
- and
- updating a neutral threshold position to a first test position when at a second test position the actuator is pushed in a direction opposite to a shift direction along an axis, wherein the shift direction is a direction the actuator shifts to engage the dog clutch, and where the first test position is a last tested position before the second test position.
A method for estimating a neutral threshold position and an engagement threshold position of a dog clutch, comprising:
- locking a driven shaft of a transmission;
- positioning an actuator at a first prescribed position;
- commanding an electric machine to rotate at a speed;
- and
- updating the first prescribed position of the actuator as the neutral threshold position and calculating a second prescribed position when the actuator is pushed in a direction opposite to a shift direction along an axis, wherein the shift direction is a direction the actuator shifts to engage the dog clutch, and
- locking the driven shaft of the transmission;
- positioning the actuator at the second prescribed position;
- commanding the electric machine to rotate at the speed;
- and
- updating the second prescribed position as the engagement threshold position when the electric machine stalls.
Dependencies are inferred from the claim text.