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Travel control method of electric vehicle

  • US 6,968,265 B2
  • Filed: 09/24/2004
  • Issued: 11/22/2005
  • Est. Priority Date: 10/28/2003
  • Status: Active Grant
First Claim
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1. A travel control method for an electric vehicle having left and right motors for independently driving respective left and right drive wheels and having left and right brakes for regulating driving speeds of the respective left and right drive wheels, comprising the steps of:

  • independently regulating with the left and right brakes the speeds of the left and right drive wheels driven by the left and right electric motors; and

    performing speed-reduction control of the left and right electric motors when brake percentages of the left and right brakes are approximately equal to each other by determining the speed of each of the left and right electric motors and reducing the speed of one of the left and right electric motors being driven at a first speed to match the speed of the other of the left and right electric motors being driven at a second speed lower than the first speed;

    wherein reduction of the speed of the one of the left and right electric motors driven at the first speed is not carried out when a first condition, in which a difference between the first and second speeds of the left and right electric motors is below a first preselected threshold value, and a second condition, in which the first speed of the one of the left and right electric motor is below a second preselected threshold value identical or substantially equal to a low speed range of the electric vehicle, are met.

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