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Real-time virtual axle assembly temperature sensor

  • US 9,714,871 B2
  • Filed: 05/20/2014
  • Issued: 07/25/2017
  • Est. Priority Date: 05/20/2014
  • Status: Active Grant
First Claim
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1. A vehicle, comprising:

  • an axle assembly, including;

    an input configured to receive drive torque from a powertrain of the vehicle,a pair of axle shafts,a gearbox that translates the drive torque from the input to the pair of axle shafts, andan axle housing having an axle shaft portion that houses at least a portion of the pair of axle shafts and a gearbox housing portion that houses the gearbox; and

    a controller configured to;

    (i) determine an initial temperature of the axle assembly based on an ambient temperature external to the vehicle and a fluid temperature of a transmission of the vehicle,(ii) determine an operating mode of the vehicle, the operating mode of the vehicle being one of moving and non-moving, and(iii) estimate, using an axle temperature model, a temperature of the axle assembly based on the determined initial axle assembly temperature and the vehicle operating mode.

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