DUAL FUEL INJECTOR, ENGINE, AND CONTROL METHOD FOR A DUAL FUEL INJECTOR

Provided are a dual fuel injector, an engine, and a control method for a dual fuel injector, relating to the technical field of engines. The dual fuel injector includes a fuel oil supply passage, a gaseous fuel supply passage, and a fuel injection portion. The fuel oil supply passage is used for delivering fuel oil, the gaseous fuel supply passage is used for delivering gaseous fuel, the fuel injection portion is used for being in communication with a combustion chamber, and the fuel injection portion is selectively in communication with the fuel oil supply passage, and the fuel injection portion is selectively in communication with the gaseous fuel supply passage.