| 摘要 |
PROBLEM TO BE SOLVED: To improve a device for injecting fuel where the use of a high tubular spring sleeve is required as conventional.SOLUTION: The fuel injecting device comprises: a valve needle 3 of outside opening type; a piezo actuator 2; a valve body 4 furnished with a first needle guide 5 and a second needle guide 6; a return element 7 coupled with the valve needle 3 in the force introducing position 8 in order to transmit the returning force; and a seal element 9 coupled with the valve needle 3 in the seal position 12, wherein the valve needle 3 has an end 3a on the injection side and an end 3b on the actuator side, and if viewed from the end 3a on the injection side, the first needle guide 5, the second needle guide 6, the force introducing position 8, and the seal position 12 are arranged on the valve needle 3 in the sequence as named. |
