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Simulated sound generator for electric vehicles

  • US 5,635,903 A
  • Filed: 12/21/1994
  • Issued: 06/03/1997
  • Est. Priority Date: 12/21/1993
  • Status: Expired due to Term
First Claim
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1. A simulated sound generator for use in an electric passenger vehicle in which motive power for the vehicle is supplied by electricity comprising:

  • an electrically powered drive motor for driving wheels of the electric vehicle;

    a start sensor for detecting starting of the electric vehicle and ignition operation of said drive motor;

    a speed sensor for detecting a running speed of the electric vehicle;

    an accelerator opening sensor for detecting a degree of opening of an accelerator of the electric vehicle;

    a simulated sound selector device for outputting simulated sound selection information based on starting information from said start sensor, speed information from said speed sensor and accelerator degree of opening information from said accelerator opening sensor;

    a simulated sound source device for producing a simulated sound based on the simulated sound selection information from said simulated sound selector device; and

    a sound level switcher device for selecting a sound level of the simulated sound from said simulated sound source device based on said starting information, said speed information and said accelerator degree of opening information, wherein simulated sounds depending on operating conditions of the electric vehicle are produced.

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