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Constant speed regulator apparatus

  • US 5,749,427 A
  • Filed: 07/11/1996
  • Issued: 05/12/1998
  • Est. Priority Date: 09/18/1995
  • Status: Expired due to Fees
First Claim
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1. A constant speed regulator apparatus of an automotive vehicle in which a throttle opening angle of a throttle valve changes in response to a position of an accelerator pedal set by a vehicle operator and in response to an action of a driven throttle adjusting actuator, comprising:

  • a vehicle speed sensing unit for detecting a vehicle speed of the automotive vehicle;

    an idle switch unit for detecting an OFF state of the throttle valve;

    a throttle adjusting actuator for adjusting a throttle opening angle of the throttle valve to control the vehicle speed;

    a target speed determining unit for determining a target speed by using the vehicle speed which is detected by the vehicle speed sensing unit immediately after the OFF state of the throttle valve is detected by the idle switch unit; and

    an actuator control unit for controlling the throttle adjusting actuator to set the throttle opening angle of the throttle valve at a controlled level to maintain the vehicle speed at the target speed determined by the target speed determining unit, wherein when the accelerator pedal is pressed to exceed the level of the throttle opening angle controlled by the throttle adjusting actuator during a constant-speed running mode, the actuator control unit controls the throttle adjusting actuator to temporarily decrease the throttle opening angle to zero, and wherein a new target speed is determined based on the vehicle speed detected after the accelerator pedal is released and an OFF state of the throttle valve is detected by the idle switch unit.

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