Injection hole plate and fuel injection apparatus having the same

A fuel injection apparatus comprising:

• a valve body that includes a valve seat, which is formed in an inner peripheral surface of the valve body that forms a fuel passage in the valve body;
• an injection hole plate that is arranged downstream of the valve seat and includes a wall, which has a plurality of injection holes, wherein the injection holes penetrate through the wall of the injection hole plate to inject fuel supplied from the fuel passage, and each injection hole of the injection hole plate includes:
• at least one first-side hole section that extends from an upstream end of the wall of the injection hole plate to an axially intermediate point of the wall of the injection hole plate, which is located between the upstream end of the wall and a downstream end of the wall;
• a collision portion, in which fuel flows supplied from the at least one first-side hole section collide with one another;
• and
• at least one second-side hole section that extends from the downstream end of the wall of the injection hole plate and is communicated with the at least one first-side hole section, wherein the at least one second-side hole section conducts fuel collided in the collision portion to the downstream end of the wall of the injection hole plate;
• and
• a valve member that is reciprocably received in the valve body and is seatable against the valve seat, wherein the valve member enables fuel injection from the injection holes when the valve member is lifted away from the valve seat, and the valve member disables fuel injection from the injection holes when the valve member is seated against the valve seat.

An injection hole plate for a fuel injection apparatus, the injection hole plate comprising a wall, which has a plurality of injection holes that penetrate through the wall of the injection hole plate to inject fuel, wherein each injection hole of the injection hole plate includes:

• at least one first-side hole section that extends from an upstream end of the wall of the injection hole plate to an axially intermediate point of the wall of the injection hole plate, which is located between the upstream end of the wall and a downstream end of the wall;
• a collision portion, in which fuel flows supplied from the at least one first-side hole section collide with one another;
• and
• at least one second-side hole section that extends from the downstream end of the wall of the injection hole plate and is communicated with the at least one first-side hole section, wherein the at least one second-side hole section conducts fuel collided in the collision portion to the downstream end of the wall of the injection hole plate.