INJECTOR

• Main Author: FUJINO TOMOKI
• Format: Patent
• Language: English; Japanese
• Published: 14.11.2019
• Subjects: BLASTING; COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

To provide an injector 20 for suppressing the wear of a contact area between a needle 50 and a movable core 42.SOLUTION: The injector 20 includes a housing 30, a fixed core 41, the movable core 42, a coil 44, the needle 50, and a spring 61. A shaft part 51 has a first protruded part 53 on the side of a valve part 52 and a second protruded part 54 on the side of the fixed core while holding the movable core therebetween. A space between a third face 421 as the face of the valve part side of the movable core and a fourth face 422 as the face of the fixed core side of the movable core along the axial direction is smaller than a space between a first face 531 as the face of the fixed core side of the first protruded part and a second face 541 as the face of the valve part side of the second protruded part in the axial direction AX. On at least one of the first face and the third face, an elastic member 55 is provided.SELECTED DRAWING: Figure 1 【課題】インジェクタ２０において、ニードル５０と可動コア４２との接触部における摩耗を抑制する。【解決手段】インジェクタ２０は、ハウジング３０と固定コア４１と可動コア４２とコイル４４とニードル５０とスプリング６１とを備える。軸部５１は、可動コアを挟んで弁部５２側に第１突出部５３と固定コア側に第２突出部５４とを有し、第１突出部の固定コア側の面である第１面５３１と、第２突出部の弁部側の面である第２面５４１との軸方向ＡＸに沿った間隔よりも、可動コアの弁部側の面である第３面４２１と、可動コアの固定コア側の面である第４面４２２との軸方向に沿った間隔の方が小さく、第１面と第３面との少なくともいずれか一方に、弾性部材５５が設けられている。【選択図】図１