Water injector control method for immediate water injection and engine driven by method

A method of controlling an operation of a water injector for injecting water into a combustion chamber of an engine to which a turbo system for increasing an amount of air by pressing air has been applied, the method comprising:

• a water pressure detection step of detecting water pressure applied to a water supply pipe for supplying water to the water injector;
• a pump stop step of stopping an operation of a water supply pump when the data detected in the water pressure detection step reaches a preset reference value;
• a water temperature detection step of detecting a temperature of water within the water supply pipe for supplying the water to the water injector;
• and
• a water replacement step of returning the water within the water supply pipe to a water storage tank and driving the water supply pump to supplying new water to the water supply pipe when the data detected in the water temperature detection step deviates from a preset range, wherein
• the water temperature detection step comprises further detecting a modeling temperature of each of the engine and a manifold, and
• when the detected modeling temperature of each of the engine and the manifold deviates from a preset range, the water replacement step of returning the water within the water supply pipe to the water storage tank and driving the water supply pump to supply the new water to the water supply pipe is performed.