Control method and apparatus for gasohol flexible fuel engine

The invention discloses a method and a device for controlling a gasoline alcohol flexible fuel engine, wherein the method comprises supply and injection of gasoline and supply and injection of alcohols; the working mode comprises that the engine is started by using a mode of original vehicle gasoline and a gasoline nozzle injects gasoline to keep the engine working normally; when a select switch of the alcohol fuel is closed, an alcohol controller detects the cooling liquid temperature and the engine oil temperature of the engine: if the cooling liquid temperature and the engine oil temperature reach the evaporation point of the alcohols, the alcohol controller starts to receive an oil injection pulse sent by an gasoline controller and convert the oil injection pulse into the injection pulse width of the alcohol fuel; the alcohol controller converts the oil injection pulse into an alcohol injection pulse and controls an alcohol nozzle to work; the modes that the gasoline controller controls the gasoline injection and the alcohol controller controls the alcohol injection are switched in proportion and are performed alternately; and after the alcohol nozzle finishes 8 to 10 seconds of working cycle of the engine through continuous injection, the gasoline nozzle finishes 1 to 2 seconds of working cycle through injection, and the operations are repeated alternately.