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CONTROL DEVICE AND CONTROL METHOD OF AUTOMATIC TRANSMISSION

  • US 20090137362A1
  • Filed: 06/05/2008
  • Published: 05/28/2009
  • Est. Priority Date: 11/22/2007
  • Status: Active Grant
First Claim
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1. A control device of an automatic transmission, comprising:

  • an automatic transmission coupled to an engine and having a gear-change mechanism portion and a clutch to transmit motive power from the engine to the gear-change mechanism portion;

    a clutch control portion to engage and disengage the clutch; and

    a motor control portion to control an output of a motor that executes a control operation on the clutch control portion,wherein the motor control portion includes;

    a target motor current computation portion that computes a target motor current according to a desired driving state;

    a motor current detection portion that detects plural motor currents respectively corresponding to plural detection timings;

    a selection portion that selects a motor current corresponding to the desired driving state among the plural motor currents that have been detected; and

    a motor driving portion that applies feedback control on the output of the motor according to a difference between the target motor current and the motor current that has been selected.

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