FUEL INJECTION DEVICE

• Main Author: HOTTA SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 12.12.2019
• 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 a fuel injection device capable of suppressing the valve opening delay of an opening/closing member while suppressing the attitude destabilization of the opening/closing member.SOLUTION: A fuel injection device 1 includes a body 10, a needle 70, and a movable plate 50. The body 10 is formed with an injection hole 23 from which fuel is injected, a control chamber 30 in which the fuel is filled, and an inflow passage 24 through which the fuel flows into the control chamber 30. The needle 70 closes the injection hole 23 with the fuel flowing into the control chamber 30. The movable plate 50 can move between a valve closing position where the inflow passage 24 is closed and a valve opening position where the inflow passage 24 is opened. A communication passage 80 is formed so that, when the movable plate 50 is at the valve opening position, communication between a grinding release part 37 and the control chamber 30 is allowed.SELECTED DRAWING: Figure 7 【課題】開閉部材の姿勢の不安定化を抑制しつつ、開閉部材の開弁遅れを抑制可能な燃料噴射装置を提供する。【解決手段】燃料噴射装置１は、ボデー１０、ニードル７０、および可動プレート５０を備えている。ボデー１０には、燃料を噴射する噴孔２３、および燃料が充填される制御室３０、および制御室３０に燃料を流入させる流入路２４が形成されている。ニードル７０は、制御室３０への燃料の流入に伴い噴孔２３を閉弁する。可動プレート５０は、流入路２４を閉じる閉弁位置と、流入路２４を開く開弁位置とを移動可能である。可動プレート５０が開弁位置にある場合に、研削逃がし部３７と制御室３０とを連通させる連通路８０が形成される。【選択図】図７