| 摘要 |
PROBLEM TO BE SOLVED: To inject fuel including fine bubbles from the early stage of opening a fuel injection valve.SOLUTION: The fuel injection valve includes: a needle valve having a seat part on the front end side; a nozzle body having a seat surface on which the seat part is seated, and including a sack chamber provided on the downstream side of the seat surface, and an injection hole provided in the sack chamber and having an inlet; a needle guide stored in the nozzle body and slidably storing the needle valve; and a swirl flow generating part provided on the further upstream side than the seat part and swirling fuel introduced into the sack chamber. The needle valve which has a piston storage chamber formed inside to store a magnetic piston includes an air storage chamber formed encircled by the inner peripheral wall of the piston storage chamber and the magnetic piston, and a communication passage communicating the air storage chamber with the sack chamber. The needle guide includes a magnetic part arranged around the magnetic piston. |
