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Method and system for controllably transferring energy from a high voltage bus to a low voltage bus in a hybrid electric vehicle

  • US 7,199,551 B2
  • Filed: 09/26/2003
  • Issued: 04/03/2007
  • Est. Priority Date: 09/26/2003
  • Status: Expired due to Fees
First Claim
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1. A method for operating a hybrid electric vehicle (HEV) having a low voltage bus, a high voltage bus, and a DC convertor electrically coupling the low and high voltage busses, the method comprising:

  • controllably transferring energy from the high voltage bus to the low voltage bus during prestart of the high voltage bus by controlling energy flow through the DC/DC converter.

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