Automatic speed adjusting device for small-size two-stroke gasoline engine

[0015] Figure 1 to Figure 3 Shown, for the present invention creates the concrete embodiment of a kind of small two-stroke gasoline engine automatic speed control device, it comprises carburetor 1, speed regulating motor 3, circuit controller 4, engine 5, flywheel and magneto 6, engine High voltage pack 7, speed regulating motor 3 are fixed on the carburetor 1 by mounting bracket 2, and the engine speed signal of the flywheel and magneto 6 that are installed on the crankshaft of engine 5 is transmitted to circuit controller 4, and circuit controller 4 and After the set speed is compared, the rotation signal of the speed regulating motor is output, so that the speed regulating motor 3 rotates forward or reversely, the throttle opening of carburetor 1 is opened or closed at a certain angle driven by speed regulating motor 3, and the throttle opening of carburetor 1 changes Control the engine 5 rotating speed, make the engine 5 rotating speed work at a constant speed under the set rotating speed. The circuit controller 4 is connected between the engine high voltage pack 7 and the speed regulating motor 3 , and the working power of the circuit controller 4 is provided by the engine high voltage pack 7 .

[0016] When the carburetor 1 adopts a rotary valve carburetor, the rotating shaft of the speed regulating motor 3 is connected with the rotary valve shaft of the rotary valve carburetor, and the rotating shaft rotation direction of the speed regulating motor 3 is the same as that of the rotary valve. The rotary valve shaft of the type carburetor rotates in the same direction.

[0017] When the carburetor 1 adopts a butterfly valve carburetor, the rotating shaft of the speed regulating motor 3 is connected with the throttle shaft of the butterfly valve carburetor, and the rotating shaft of the speed regulating motor 3 is in the same direction as the butterfly valve carburetor. The direction of rotation of the throttle valve of the controller is the same.

[0018] The embodiment of the present invention is as follows, first set the rotating speed for the circuit controller 4, then start the engine 5, and make it run at idle speed. During normal work, turn on the switch to make the speed regulating motor 3 run, open the carburetor 1 damper to make the engine 5 run at high speed. The flywheel and the magneto 6 installed on the crankshaft of the engine 5 make the engine high-voltage package 7 ignite once every one week of operation, and transmit the engine speed signal to the circuit controller 4 to compare with the set speed. After the circuit controller 4 judges, the speed is too low or when it is too high, the circuit controller 4 sends the speed regulating motor rotation signal to control the speed regulating motor 3, so that the speed regulating motor 3 rotates a certain angle clockwise or counterclockwise, and the throttle opening of the carburetor 1 is driven by the speed regulating motor 3 to open Or off at an angle. When the throttle of the carburetor 1 is opened, the intake air volume of the mixture increases, and the speed of the engine 5 increases; when the throttle of the carburetor 1 is closed, the intake air volume of the mixture decreases, and the speed of the engine 5 decreases. During the whole working process, the circuit controller 4 monitors the rotation speed of the engine 1 in real time, and feeds back in time to automatically control the engine 5 to work at a constant speed at a set rotation speed.

[0019] The above is only an embodiment of the invention, and does not impose any formal restrictions on the invention. On the basis of not departing from the technical solution of the invention, any simple modification, equivalent change or modification shall fall into the The scope of protection created by the present invention.