The invention relates to the technical field of internal
combustion engines, and discloses a dual-fuel
injector and a ship. The dual-fuel
injector comprises a valve body, a
needle valve element and a sliding valve element. The ship adopts the dual-fuel
injector, when the sliding valve element is located at the first position, the diesel oil channel, the inner cavity channel and the mold cavity are sequentially communicated, diesel oil enters from the diesel oil channel, and part of the diesel oil enters the injection cavity through the diesel oil channel, the inner cavity channel, the mold cavity and the injection channel. And the other part of the diesel enters the switch channel, the
needle valve core moves under the pressure of the diesel and opens the injection orifice, and the diesel in the injection cavity is injected from the injection orifice. And when the sliding valve element is located at the second position, the
natural gas enters the injection cavity through the
natural gas channel, the cavity and the injection channel. Part of diesel oil enters the switch channel, the
needle valve element moves under the pressure of the diesel oil, the injection opening is opened, and
natural gas in the injection cavity is injected out of the injection opening. According to the dual-fuel injector, dual-
fuel injection of diesel
oil and natural gas can be achieved, and the structure of the dual-fuel injector is simplified.