US Patent 8668156 Direct injection injector for engine

A direct injection injector for an engine includes a body forming the outer structure and having a space therein, a needle inserted to slide linearly in the body and having a hole therein forming a fuel channel, and a cylinder nozzle fitted on needle to communicate with hole and having a nozzle hole for injecting fuel, such that it is possible to prevent caulking in which the nozzle of the injector is clogged with soot while injecting fuel at relatively low pressure, change the spray type of the injected engine in various shapes, and sufficiently decrease the size of droplet of the fuel.