Apparatus and method for operating a clutch in a transmission
AssigneeGM Global Technology Operations LLC
InventorsGregory Mordukhovich, Michael B. Viola
Life of this patent
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Abstract
A method to control a clutch in a transmission includes monitoring a frequency response of the clutch including monitoring a response repeating one time per revolution of the clutch a response repeating more than one time per revolution of the clutch. A ratio of the response repeating more than one time per revolution of the clutch to the response repeating one time per revolution of the clutch is determined and compared to a first threshold ratio. A likely shudder condition is indicated based upon the comparing.
Claims18
Method to control a clutch in a transmission, comprising:
- monitoring a frequency response of the clutch, comprising:
- monitoring a response repeating one time per revolution of the clutch;
- and
- monitoring a response repeating more than one time per revolution of the clutch;
- determining a ratio of the response repeating more than one time per revolution of the clutch to the response repeating one time per revolution of the clutch;
- comparing the ratio to a first threshold ratio;
- and
- indicating a likely shudder condition based upon the comparing.
Method to control a clutch in a dual clutch transmission, comprising:
- monitoring a frequency response of the clutch, comprising:
- monitoring a response repeating one time per revolution of the clutch;
- monitoring a response repeating two times per revolution of the clutch;
- and
- monitoring a response repeating three times per revolution of the clutch;
- determining a first ratio comprising a ratio of the response repeating two times per revolution of the clutch to the response repeating one time per revolution of the clutch;
- determining a second ratio comprising a ratio of the response repeating three times per revolution of the clutch to the response repeating one time per revolution of the clutch;
- comparing the first ratio and the second ratio to a threshold ratio;
- and
- indicating a likely shudder condition based upon the comparing indicating either the first or second ratio to be greater than the threshold ratio.
Apparatus to control a clutch in a transmission, comprising:
- a transmission comprising a clutch;
- a torque sensor located to monitor a torque within the transmission;
- a control module:
- monitoring a signal from the torque sensor;
- determining a frequency response of the monitored signal of the torque sensor;
- comparing the determined frequency response to a threshold;
- and
- indicating a likely shudder condition based upon the comparing.
Dependencies are inferred from the claim text.