Abstract In an apparatus for controlling a vehicle at constant speed, an actual vehicle speed signal is developed and when it is desired to operate the vehicle continuously at the desired vehicle speed the desired vehicle speed is stored in a memory. A negative feedback signal responsive to the opening degree of the throttle valve is applied to the storage means storing the desired vehicle speed for varying the stored desired vehicle speed in accordance with the opening degree of the throttle valve. An artificial throttle valve opening degree signal corresponding to the vehicle running condition when traveling on an even traffic surface at a speed equal to the actual vehicle speed is obtained by modifying the actual speed signal. The negative feedback signal is replaced with said artificial throttle valve opening degree signal upon selection of a desired vehicle speed and the memorized actual speed signal is compared with the actual speed signal to provide the necessary control for a throttle servo.
Apparatus for constant speed control of vehicle travel speed, comprising: a throttle servo means, a first electrical circuit providing an electrical signal responsive to actual vehicle speed, means for establishing a desired vehicle speed, a second electrical circuit for providing a second electric signal responsive to the desired vehicle speed, a third electrical circuit including a potentiometer for obtaining a negative feedback signal responsive to throttle valve opening degree, said third circuit being connected with said second circuit, for varying said desired vehicle speed, a fourth electric circuit for providing an artificial throttle valve opening degree signal corresponding to the vehicle running condition when traveling on an even traffic surface at a speed equal to said actual vehicle speed by modifying said first signal, a fifth electric circuit for memorizing said second electric signal, a sixth electric circuit for replacing said negative feedback signal from said third electric circuit with said artificial throttle valve opening degree signal upon operation of said means, and a seventh electric circuit for comparing said memorized signal in said fifth circuit with said first electric signal for the control of said throttle servo means.
Claim 2
Dependent Claim
189 words
Apparatus for constant speed control of vehicle travel speed, comprising: a throttle servo means, a first electrical circuit providing an electrical signal responsive to actual vehicle speed, means for establishing a desired vehicle speed, a second electrical circuit for providing a second electric signal responsive to the desired vehicle speed, a third electrical circuit including a potentiometer for obtaining a negative feedback signal responsive to throttle valve opening degree, said third circuit being connected with said second circuit, for varying said desired vehicle speed, a fourth electric circuit for providing an artificial throttle valve opening degree signal corresponding to the vehicle running condition when traveling on an even traffic surface at a speed equal to said actual vehicle speed by modifying said first signal, a fifth electric circuit for memorizing said second electric signal, a sixth electric circuit for replacing said negative feedback signal from said third electric circuit with said artificial throttle valve opening degree signal upon operation of said means, and a seventh electric circuit for comparing said memorized signal in said fifth circuit with said first electric signal for the control of said throttle servo means.
Claim 3
Dependent Claim
72 words
The apparatus of claim 1 wherein said first circuit includes a circuit for generating a pulse having a pulse width corresponding to the actual vehicle speed and said second circuit includes a first means for determination of a quasi-stabilization period, a second means for generating a pulse having a width as determined by said first means and a third means for generating a pulse of reverse phase relative to the last-mentioned pulse.