Navigation system for electric automobile

  • US 5,815,824 A
  • Filed: 03/06/1996
  • Issued: 09/29/1998
  • Est. Priority Date: 03/06/1995
  • Status: Expired due to Term
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First Claim
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1. A navigation system for an electric automobile having a battery, an electric drive motor for driving wheels by electric power from said battery, motor control means for controlling operation of said electric drive motor by adjusting electric power fed to said electric drive motor in accordance with an output demand operation, and remaining capacity detection means for detecting a remaining capacity of said battery, the navigation system comprising:

  • road map information storage means for storing road map information;

    drive plan information input means for inputting drive plan information including a destination of said automobile;

    present position detecting means for detecting a present position of said automobile;

    indication control means for controlling at least one of screen display information and audio indication information of map information and route information on the basis of information from said road map information storage means, said drive plan information input means, and said present position detecting means;

    reachability determination means for determining, based on a distance planned to be driven by said automobile from the detected present position to said destination and said remaining capacity of said battery determined by said remaining capacity detection means, whether said automobile can reach said destination with said remaining capacity of said battery; and

    use-condition-limited reachability determination means for limiting use of electrical power to extend a driving range of said automobile.

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