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Straddle type vehicle having an electronic throttle valve system

  • US 20060243247A1
  • Filed: 04/20/2006
  • Published: 11/02/2006
  • Est. Priority Date: 05/02/2005
  • Status: Active Grant
First Claim
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1. A straddle type vehicle having an electronic throttle valve system for adjusting the amount of intake air to an internal combustion engine, the electronic throttle valve system comprising:

  • a throttle valve for adjusting the amount of intake air to the internal combustion engine;

    an electric motor for actuating the throttle valve; and

    a control unit for controlling the electric motor, wherein the throttle valve is fixed to a valve shaft;

    the electric motor, connected to the valve shaft, is located for actuating the throttle valve through the valve shaft;

    a throttle opening sensor is provided on the valve shaft, the throttle opening sensor being in electrical connection with the control unit and detecting the opening of the throttle valve;

    a guard mechanism is provided on the valve shaft, the guard mechanism including;

    a pulley with which a throttle cable is engaged, the throttle cable being coupled to a throttle grip of the straddle type vehicle; and

    a first rotational member for operating in conjunction with the pulley;

    a second rotational member is formed on the valve shaft, the second rotational member operating in conjunction with the valve shaft;

    a relative movement of the first and the second rotational members is limited within a predetermined displacement; and

    an elastic member is formed between the first and second rotational members.

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