This application provides a fuel
injector and its control method, as well as a vehicle. The fuel
injector includes a body and a water inlet. The body contains a fuel passage and an air-water passage, and has an
injection port and a water
injection port. The inlet of the fuel passage connects to a
fuel supply system, and the outlet of the fuel passage communicates with the
injection port. The body also includes an injection valve
assembly connected to the fuel passage, which controls the opening and closing of the fuel passage. The inlet of the air-water passage connects to an air source, and the outlet of the air-water passage communicates with a water injection port. The water inlet is located on the body and contains a water injection passage. One end of the water injection passage connects to a
water supply system, and the other end communicates with the air-water passage to inject water into the air-water passage, causing air-liquid mixing. The water inlet includes a water injection valve
assembly, which controls the opening and closing of the water injection passage. The fuel
injector of this application simultaneously functions as both water and
fuel injection, effectively meeting the needs of various complex engine operating conditions.