| 摘要 |
PROBLEM TO BE SOLVED: To increase lubricity and ignition of a needle sliding part and a valve part in injectors injecting mainly a high-pressure gas fuel in such a manner that one injector is used for each of the cylinders of an internal combustion engine. SOLUTION: A liquid fuel for lubrication is led from a high-pressure liquid passage 34 to the guide part 311 of a needle 31, and further fed to a liquid fuel supply hole 313 for seat lubrication and a liquid fuel supply hole 314 for ignition through a fuel passage 315 in the needle. The liquid fuel supply hole 313 for seat lubrication opens to the upstream side of the seat part 38 and lubricates the seat part 38. The liquid fuel supply hole 314 for ignition opens to the downstream side of the seat part 38, and injects the liquid fuel together with a high-speed gas fuel into an engine combustion chamber to increase the ignition. COPYRIGHT: (C)2006,JPO&NCIPI |
