| 摘要 |
PURPOSE:To prevent the car speed from changing rapidly when a car comes back to a flat road by allowing a duty control on the throttle valve opening to be effected and also allowing the accumulation of set deviations to be interrupted when the car is running on a slope with a system where set deviations to the set duty are correctly integrated. CONSTITUTION:In a device as referred to the title, after F/V conversion 19 of a speed signal C from a lead switch 13 is effected, it is inputted into a memory 21 through a switch 20 where an average voltage (set up car speed) for the stated period of time is stored by means of an averaging function in the memory 21. Then, a deviation between an actual car speed and the set up car speed, is determined by a comparator 22, the output from which is applied to a solenoid coil 17 by way of a timing compensation circuit 23 which compensates the delay in mechanical operations of an actuator 16, and of a prohibiting gate 24 which is opened only when a car is running at a constant speed. Thus, a duty control on a control valve which controls the throttle valve opening, is allowed to be effected. In this case, when the car is running on a slope exceeding the specified angle of inclination, its detected output E allows the operation of an integration circuit 40 to be discontinued once permitting its accumulation of set deviations to be interrupted.
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