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Transmission Fluid Warming and Cooling Method

  • US 20110284200A1
  • Filed: 05/21/2010
  • Published: 11/24/2011
  • Est. Priority Date: 05/21/2010
  • Status: Active Grant
First Claim
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1. A method for controlling the temperature of transmission fluid in a motor vehicle having an engine and a transmission comprising:

  • operating in a heater priority mode by disabling automatic transmission fluid heating;

    determining when to enter an automatic transmission fluid heating mode by determining when any one of a group of conditions has been met wherein entering an automatic transmission fluid heating mode occurs after the heater priority mode and only when any one of the group of conditions has been met; and

    entering the automatic transmission fluid heating mode by sending hot engine coolant to the heat exchanger for heating the automatic transmission fluid by transferring heat from the hot engine coolant to the automatic transmission fluid.

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