| 摘要 |
PROBLEM TO BE SOLVED: To provide an injector mountable to various types of engines. SOLUTION: A high pressure passage 75 for supplying high pressure fuel to a nozzle 20, a storage hole 73 for storing a piezoelectric actuator 90 controlling opening/closing operation of a needle 30 stored in the nozzle 20 and a low pressure passage 76 for discharging surplus fuel to a low pressure side are formed on a lower body 70 supporting the nozzle 20 of the injector 10. An opening part 77 of the low pressure passage 76 is formed on the outer peripheral wall 71 of the lower body 70. The outer peripheral wall 71 is provided with a ring member 100 which covers the outer peripheral wall 71, has a fuel passage 105 formed between an inner peripheral wall 101 and the outer peripheral wall 71, communicated with the opening part 77 and making surplus fuel discharged from the opening part 77 flow in the circumferential direction and has a through-hole 103 and a pipe 104 for discharging the surplus oil flowing into the fuel passage 105 to the outside of the injector 10. COPYRIGHT: (C)2009,JPO&INPIT
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