FUEL INJECTION VALVE

• Main Authors: ISHIKAWA TORU, FURUDATE HITOSHI, MIFUJI MASANORI
• Format: Patent
• Language: English; Japanese
• Published: 05.07.2018
• 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

PROBLEM TO BE SOLVED: To improve hardness by applying surface treatment on a driving element and a damper body, or the driving element and a valve element or a valve element intermediate member, in a fuel injection valve for injecting a fuel by driving the valve element by directly transferring expansion and contraction of a piezoelectric element to the valve element.SOLUTION: A substantially spherical face of a lot-like tip portion of a damper body and a recessed conical face disposed on one end face of the driving element are brought into contact with each other, and the valve element or a projecting substantially spherical face of a tip of the valve intermediate member connected to the valve element and a recessed conical face disposed on the other end face of the driving element are brought into contact with each other to fix the driving element and the damper body.SELECTED DRAWING: Figure 9 【課題】圧電素子の伸縮を直接弁体に伝えて駆動させ、燃料を噴射する燃料噴射弁において、駆動素子とダンパー体又は駆動素子と弁体又は弁体中間部材に表面処理を実施し、硬度を高くする。【解決手段】前記ダンパー体のロット状形状の先端部の略球面と前駆動素子の一つの端面に具備された凹状の円錐面とが当接され、且つ前記弁体又は弁体と接続している弁体中間部材の先端の凸状の略球面と前駆動素子の他方の端面に具備された凹状の円錐面とが当接されて、前記駆動素子及び前記ダンパー体が固定されている。【選択図】図９