| 摘要 |
A fuel injection valve equipped with: a needle valve having a seat part at the tip thereof; a nozzle body having a seat surface on which the seat part is seated and having a rotation stabilization chamber downstream from the seat surface, and in which is formed an injection hole having an inlet within the rotation stabilization chamber; a rotational flow generation part provided with rotation grooves that impart a rotational component to fuel introduced into the rotation stabilization chamber; and a fuel collision part, which is provided at the tip of the needle valve and which, when the needle valve is open, crosses the hypothetical plane formed by extending the seat surface of the nozzle body toward the injection hole. Thus, dead fuel accumulates in the rotation stabilization chamber and is introduced into the injection hole after a rotational component is imparted by the fuel having a rotational component. |
