INJECTOR

• Main Authors: ONO KAZUJI, ISHIKAWA NAOHIRO
• Format: Patent
• Language: English; Japanese
• Published: 22.12.2016
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

PROBLEM TO BE SOLVED: To facilitate the adjustment of an orientation and a flow rate of each injection hole, in an injector.SOLUTION: In an injector 20, an inner surface 31 of a nozzle tip end portion 28 is formed on a tapered surface whose center side is inclined to a tip end side about a nozzle axis X, and a valve seat 29 is formed in a ring shape about the nozzle axis on the inner surface 31. A plurality of jet holes 35 has an opening end on the inner surface side on a center side than an outer peripheral edge of the valve seat. A hole wall inside portion 75 configuring the nozzle axis side of a hole wall, and a hole wall outside portion 76 configuring a side opposite to the nozzle axis of the hole wall are provided. First jet holes 35A, 35B, and 35C which are one or more of the plurality of jet holes are formed so as to have acute angles between the hole wall inside portion and inner surfaces and obtuse angles between the hole wall outside portion and the inner surfaces, and have first recessed portions 80A, 80B, and 80C extended from the inner surfaces to the hole wall outside portion.SELECTED DRAWING: Figure 3 【課題】 インジェクタにおいて、各噴孔の向き及び流量の調整を容易にする。【解決手段】 インジェクタ２０であって、ノズル先端部２８の内面３１は、ノズル軸線Ｘを中心として中央側が先端側に傾斜したテーパ面に形成され、弁座２９は、内面３１にノズル軸線を中心とした環状に形成され、複数の噴孔３５は、内面側の開口端が弁座の外周縁よりも中央側に配置され、その孔壁のノズル軸線側を構成する孔壁内側部７５と、孔壁のノズル軸線と相反する側を構成する孔壁外側部７６とを有し、複数の噴孔の少なくとも１つである第１の噴孔３５Ａ、３５Ｂ、３５Ｃは、孔壁内側部と内面とのなす角度が鋭角、かつ孔壁外側部と内面とのなす角度が鈍角に形成され、内面から孔壁外側部に延在する第１の凹部８０Ａ、８０Ｂ、８０Ｃを有する。【選択図】 図３