This invention discloses a fuel
injector, including an
electromagnet, a moving component, and a limiting component. The moving component includes a
valve stem, a attracted component, and a valve core. The limiting component includes a first limiting part, a second limiting part, a first elastic part, and a magnetic component located between the first and second limiting parts. The moving component can move between a first position, a second position, and a third position. When in the first position, the
electromagnet is de-energized, the attracted component separates from the magnetic component, and the valve core abuts against the
valve seat. When in the second position, the
electromagnet and the magnetic component have the same
magnetism, the magnetic component abuts against the second limiting part, the attracted component abuts against the magnetic component, and the valve core and
valve seat have a first gap. When in the third position, the electromagnet and the magnetic component have opposite
magnetism, the magnetic component abuts against the first limiting part, the attracted component abuts against the magnetic component, and the valve core and
valve seat have a second gap. The second gap is larger than the first gap. This allows for adjustment of the
fuel injection quantity of the fuel
injector.