FUEL-SAVING DEVICE OF THE CARBURETTER IN PETROL VEHICLE

The utility model discloses a fuel-saving device under the carbureter base in petrol vehicles. The utility model is characterized in that a by-pass air pipe is arranged under the carbureter base, and a valve device and an air filtration unit is arranged in a port of the by-pass air pipe. When the vehicle in the downhill or speed reduction, a fuel throttle is shut down, and the valve is opened, the air is input into the lower space of the throttle through the by-pass air pipe, the air negative pressure in the atomization area is destroyed, the petrol is stopped to go into a cylinder, and the fuel saving purpose is reached.