SPEED GOVERNOR FOR INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE:To obtain the control of the number of revolutions with a small steady deviation and a short setting time by controlling the supply amount of fuel on the basis of a deviation signal between the number of revolutions of an engine and the target number of revolutions and a discrimination signal to increase and decrease the number of revolutions of the engine with the passage of time. CONSTITUTION:The number of revolutions is detected by a revolution number detection circuit 3 on the basis of the output of a revolution number sensor 2 to detect the number of revolutions of an engine 1, and the detected number of revolutions is averaged in an average circuit 4. This average number of revolutions is compared with a target number of revolution from a setting circuit 5 in a differential amplification circuit 6 for generating a differential signal. The average number of revolutions is also sent to a revolution number increase discrimination circuit 7 for discriminating the tendency between the increase and the decrease. Outputs of both circuits 6 and 7 are inputted into a computation circuit 8 for generating a fixed control operation signal, by which a servo-motor 10 is rotated via a drive circuit 9 for regulating the injection amount of a fuel injection pump 13 via the engagement between a pinion 11 and a rack 12.