Energy-saving and emission-reducing device for vehicle internal combustion engine

The utility model relates to an energy-saving and emission-reducing device of an internal combustion engine for a vehicle, which comprises a water electrolysis tank, a circulating liquid storage tank,a gas cooling and water filtering device, a gas drying device and a liquid supplementing tank, wherein the circulating liquid storage tank is used for collecting gas-liquid mixed high-temperature electrolyte which reacts in the water electrolysis tank, one part of oxyhydrogen gas containing water vapor is fed into the gas cooling and water filtering device, and the other part of high-temperatureelectrolyte is fed into the liquid supplementing tank; the gas cooling and water filtering device is used for cooling the oxyhydrogen gas containing water vapor and filtering water; the gas drying device is used for drying the cooled and water-filtered oxyhydrogen gas and outputting the oxyhydrogen gas into the engine; and the liquid supplementing tank is used for cooling the high-temperature electrolyte and supplementing