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

A device for the control of the speed of travel of a motor vehicle by controlling the element which controls the fuel-air mixture, particularly the throttle valve and having a gas pedal which is actuatable by the driver, comprising

• transmitter means coupled with the gas pedal and transmitting an electric signal dependent on the position of the gas pedal,
• means for effecting a gas pedal dependent adjustment of said throttle valve in dependency on the position of the gas pedal corresponding to from zero vehicle speed to a maximum vehicle speed, said means comprising an electrical controller having an electrical desired-value input operatively connected with said transmitter means and an electrical actual-value input, said electrical controller including an adjustment actuator coupled with the throttle valve, and means for transmitting the instantaneous position of the adjustment actuator as an electrical signal to said actual-value input,
• circuit means operatively connected with one of said inputs of said electrical controller for producing a correction signal for correction of said gas pedal dependent adjustment of the throttle valve so as to decrease fuel consumption substantially independently of the extent of stepping-down on the gas pedal by the driver, said correction signal being dependent on at least one instantaneous operating parameter of the vehicle, said operating parameter being dependent on consumption of fuel,
• tachometer means for providing a signal dependent on the instantaneous rotational speed of the vehicle,
• said circuit means comprises,
• a line directly connected from said transmitter means to said desired value input of said controller,
• a differential amplifier having an output directly connected to said line and a first input directly connected to said tachometer means and a second input operatively connected to said output,
• a voltage divider connected directly to said second input of said differential amplifier, whereby when potential on said line via said transmitter means increases above a value associated with the instantaneous rotational speed, the potential is reduced via said output of said differential amplifier to the value associated with said instantaneous rotational speed, whereby upon acceleration the throttle valve opens only to an extent precisely necessary for said instanteous rotational speed and the vehicle is optimally accelerated with a smallest possible consumption of fuel.

A device for the control of the speed of travel of a motor vehicle by controlling the element which controls the fuel-air mixture, particularly the throttle valve and having a gas pedal which is actuatable by the driver, comprising

• transmitter means coupled with the gas pedal and transmitting an electric signal dependent on the position of the gas pedal,
• means for effecting a gas pedal dependent adjustment of said throttle valve in dependency on the position of the gas pedal corresponding to from zero vehicle speed to a maximum vehicle speed, said means comprising an electrical controller having an electrical desired-value input operatively connected with said transmitter means and an electrical actual-value input, said electrical controller including an adjustment actuator coupled with the throttle valve, and means for transmitting the instantaneous position of the adjustment actuator as an electrical signal to said actual-value input,
• circuit means operatively connected with one of said inputs of said electrical controller for producing a correction signal for correction of said gas pedal dependent adjustment of the throttle valve so as to decrease fuel consumption substantially independently of the extent of stepping-down on the gas pedal by the driver, said correction signal being dependent on at least one instantaneous operating parameter of the vehicle, said operating parameter being dependent on consumption of fuel,
• tachometer means for providing a signal dependent on the instantaneous rotational speed of the vehicle,
• said circuit means comprises,
• a line directly connected from said transmitter means to said desired value input of said controller,
• a differential amplifier having an output directly connected to said line and a first input and a second input operatively connected to said output,
• a voltage divider connected directly to said second input of said differential amplifier,
• a differentiator having an input connected to said tachometer means, and an output providing an output signal representing the exactly prevailing acceleration value of the vehicle connected to said first input of said differential amplifier, being rated such that when the amplitude of said output signal remains below a predetermined value, potential on said line is not corrected via the output of said differential amplifier, and when corresponding to larger than a predetermined acceleration movement of the gas pedal the amplitude of said output signal is above said predetermined value, the potential in said line is reduced via said differential amplifier by an amount such that the throttle valve is swung into a position which corresponds to the exactly prevailing acceleration value, whereby the acceleration of the vehicle is limited such that a minimum amount of fuel which is necessary for the prevailing acceleration is fed to the engine.