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Device for the control of the traveling speed of a motor vehicle

  • US 4,278,059 A
  • Filed: 08/30/1979
  • Issued: 07/14/1981
  • Est. Priority Date: 09/11/1978
  • Status: Expired due to Term
First Claim
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1. In a device for the control of the traveling speed of a motor vehicle with a regulating unit which is actuatable by the vehicle driver, particularly with a gas pedal, with electrical means for the transmission of the movement of the regulating unit to an element which influences the fuel-air mixture, particularly a throttle valve, with an electrical controller, the element which influences the fuel-air mixture being in operative connection with the output of the electrical controller, and including at least one comparator, one of the inputs of the comparator being applied with a voltage which is proportional to the rotational speed of the motor and its other input being applied with an adjustable constant voltage value for the rotational speed limitation, the improvement whereinthe electrical controller includes,a PI-controller having a proportional-integral time response, anda P-controller, having a proportional time response, of large amplification connected in parallel with said PI-controller, whereby said electrical controller is active during every change in the rotational speed to achieve a new rotational speed substantially without overshooting and oscillations.

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