Hybrid vehicles

  • US 7,392,871 B2
  • Filed: 05/08/2006
  • Issued: 07/01/2008
  • Est. Priority Date: 09/14/1998
  • Status: Expired due to Fees
First Claim
Patent Images

1. A hybrid vehicle, comprising:

  • at least two pairs of wheels, each pair of wheels operable to receive power to propel said hybrid vehicle;

    a first alternating current (AC) electric motor, operable to provide power to a first pair of said at least two pairs of wheels to propel said hybrid vehicle;

    a second alternating current (AC) electric motor, operable to provide power to a second pair of said at least two pairs of wheels to propel said hybrid vehiclea third AC electric motor;

    an engine coupled to said third electric motor, operable to provide power to at least one of said two pairs of wheels to propel the hybrid vehicle, and/or to said third electric motor to drive the third electric motor to generate electric power;

    a first alternating current-direct current (AC-DC) converter having an AC side coupled to said first electric motor, operable to accept AC or DC current and convert the current to DC or AC current respectively;

    a second alternating current-direct current (AC-DC) converter having an AC side coupled to said second electric motor, operable to accept AC or DC current and convert the current to DC or AC current respectively;

    a third alternating current-direct current (AC-DC) converter coupled to said third electric motor, at least operable to accept AC current and convert the current to DC;

    an electrical storage device coupled to a DC side of said AC-DC converters, wherein the electrical storage device is operable to store DC energy received from said AC-DC converters and provide DC energy to at least said first and second AC-DC converters for providing power to at least said first and second electric motors; and

    a controller, operable to start and stop the engine to minimize fuel consumption.

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