×

Control apparatus for electric oil pump

  • US 9,039,383 B2
  • Filed: 09/11/2012
  • Issued: 05/26/2015
  • Est. Priority Date: 09/22/2011
  • Status: Active Grant
First Claim
Patent Images

1. A control apparatus of an electric oil pump which supplies oil to a vehicle drive system, comprising:

  • an oil temperature measuring section which measures an oil temperature;

    a trial operation control section which performs a trial operation in a state in which a drive current of the electric oil pump is limited to be less than a required drive current of the electric oil pump, and performs the trial operation in a state in which the trial operation control section does not establish a malfunction determination of the electric oil pump when the measured oil temperature is in a temperature range in which operation of the electric oil pump is susceptible to measurement error due to a fluctuation of the oil temperature measuring section; and

    a regular operation allowing determining section which allows a regular operation of the electric oil pump while allowing the malfunction determination of a main body of the electric oil pump when a rotation number increasing state of the electric oil pump subjected to the trial operation satisfies a regular operation allowing condition, and which stops driving of the electric oil pump when the rotation number increasing state does not satisfy the regular operation allowing condition.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×