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Power supply control system for a vehicle trailer

  • US 7,498,687 B2
  • Filed: 11/17/2006
  • Issued: 03/03/2009
  • Est. Priority Date: 11/18/2005
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • a controller connected to a tractor and a trailer, the tractor having a power supply, and the trailer having first and second auxiliary devices and a brake that are powered by the tractor'"'"'s power supply, the controller being configured to selectively enable and disable each of the auxiliary devices in order to reserve electricity for use by the trailer'"'"'s brake, wherein;

    when any of a predetermined set of device disabling conditions occurs then disabling both auxiliary devices, the disabling conditions including application of a brake of the tractor or exceeding a threshold speed; and

    when none of the device disabling conditions occurs then;

    when a first device-selecting condition occurs then enabling the first auxiliary device and disabling the second auxiliary device; and

    when a second device-selecting condition occurs then enabling the second auxiliary device and disabling the first auxiliary device.

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