Fuel injection valve and its apparatus, method for manufacturing internal combustion engine and fuel injection valve and its nozzle body, and method for manufacturing the same

A fuel injection valve comprising:

• a nozzle body provided with an injection hole therein;
• a valve body for opening and closing a fuel passage from said injection hole relative to said nozzle body;
• and
• a drive means for driving said valve body;
• wherein a fuel turning element provided on the injection surface side having said injection hole of said nozzle body is connected to said nozzle body by plastic flowing of a fastening member,
• wherein a protrusion having a shape round from the extreme end to the side having an opening continuous to said injection hole on the injection surface side having said injection hole of said nozzle body and having part of the side opened continuous to the extreme end on the downstream side thereof is formed in communication with said injection hole,
• wherein an outer peripheral cross-sectional shape of said protrusion taken along a central axis line of said nozzle body is construed as an arc-shaped curved toward the central axis near a top end thereof, and
• wherein the extreme end of said protrusion is flat.

A fuel injection valve comprising:

• a nozzle body provided with an injection hole therein;
• a valve body for opening and closing a fuel passage from said injection hole relative to said nozzle body;
• a drive means for driving said valve body;
• and
• a protrusion having an opening continuous to said injection hole of said nozzle body and having part of a side opened continuously to an extreme end on the downstream side thereof, and a shape round from the extreme end of said opening to the side,
• wherein an outer peripheral cross-sectional shape of said protrusion taken along a central axis line of said nozzle body is construed as an arc-shape curved toward the central axis near a top end thereof, and
• wherein the extreme end of said protrusion is flat.