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Apparatus and method for driving a vehicle with a plurality of motors

  • US 5,879,265 A
  • Filed: 05/14/1997
  • Issued: 03/09/1999
  • Est. Priority Date: 05/14/1996
  • Status: Expired due to Fees
First Claim
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1. A method for the operation of a vehicle having a drive system with at least first and second electric motors, each motor being assigned to a wheel of the vehicle, a first switchable transmission being attached to the first electric motor and a second switchable transmission being attached to the second electric motor, the method comprising:

  • (a) switching the first transmission, said switching being a function of a total efficiency of the first motor when reaching a predetermined switching point;

    (b) monitoring the first transmission during said switching step;

    (c) switching the second transmission only when the switching process of the first transmission is completed so that no interruption of tracking force occurs in the entire drive system, said switching of the second transmission being a function of a total efficiency of the second motor when reaching a predetermined switching point.

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