To reduce the possibility of fuel leak by improving sealing performance of a second injection hole 3 which is opened and closed in a slide manner in a fuel injection nozzle 1.
The nozzle 1 is provided with a body 4 including the second injection hole 3 opened and closed in the slide manner and a needle 5 opening and closing a first and the second injection hole 2, 3. The second injection hole 3 is opened while a needle side slide part (an outer circumference surface 26 of a sliding member 25) slides on a body side sliding part (notched circumference surface 23). The needle side slide part and the body side slide part are pressed against each other by elastic force of a spring 32 energizing the sliding member 25 in a radial direction. As a result, the needle side sliding part can be concentratedly pressed against the body side sliding part on which an opening part 31 of the second injection hole 3 is provided. Consequently, fuel penetrates in a gap between the needle side sliding part and the body side sliding part to reduce the possibility of fuel leak from the second injection hole 3.
| JP4251123 | Internal combustion engine |
| WO/2000/032928 | FUEL INJECTOR FOR SELF-IGNITING INTERNAL COMBUSTION ENGINES |
OKAJIMA MASAHIRO
KOIE KAZUTOSHI
MIYOSHI SHINJI
GOTO MORIYASU
TOMITA HIROKUNI
NIPPON SOKEN