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Dual fuel carburetor gasoline engine using ethanol and gasoline separated fuel storage, avoid many drawbacks, existing in ethanol gasoline, dual fuel carburetor design computer using AT89S52 microcontroller as the core of the control system, the control system of dual fuel carburetor key display, detection and alarm, lack of liquid, the engine speed measurement and calculation, ethanol pump stall detection and protection, the amount of ethanol injection control, hydraulic cylinder hydraulic rod limit detection and protection functions, at the same time, can real-time acquisition of automobile engine speed signal, through the preset software to analyze the engine speed, accurately calculate the single ethanol injection time and injection frequency. In order to accurately control the air, ethanol and gasoline according to the ratio of mixed burning, improving the combustion efficiency of gasoline, reducing fuel consumption, reduce The emission of harmful substances to achieve the purpose of energy saving and emission reduction. In practical application, the control system runs stably and has good anti-jamming performance and accurate control.