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1. WO2021039434 - FUEL INJECTION DEVICE

Publication Number WO/2021/039434
Publication Date 04.03.2021
International Application No. PCT/JP2020/030850
International Filing Date 14.08.2020
IPC
F02M 51/00 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
51Fuel-injection apparatus characterised by being operated electrically
F02M 51/06 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
51Fuel-injection apparatus characterised by being operated electrically
06Injectors peculiar thereto
CPC
F02M 51/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
51Fuel-injection apparatus characterised by being operated electrically
F02M 51/06
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
51Fuel-injection apparatus characterised by being operated electrically
06Injectors peculiar thereto ; with means directly operating the valve needle
Applicants
  • 日立Astemo株式会社 HITACHI ASTEMO, LTD. [JP]/[JP]
Inventors
  • 菅谷 真士 SUGAYA Masashi
  • 宮本 明靖 MIYAMOTO Akiyasu
  • 三宅 威生 MIYAKE Takao
  • 杉井 泰介 SUGII Taisuke
Agents
  • 戸田 裕二 TODA Yuji
Priority Data
2019-15537028.08.2019JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) FUEL INJECTION DEVICE
(FR) DISPOSITIF D'INJECTION DE COMBUSTIBLE
(JA) 燃料噴射装置
Abstract
(EN)
The purpose of the present invention is to provide a fuel injection device capable of stable high-pressure fuel injection. To attain this purpose, the fuel injection device includes: a valve body 113; an anchor 110 that moves the valve body 113 to an upstream side; a surrounding member 102 that surrounds the valve body 113 and the anchor 110 from the outside; a spring 124 that is arranged on the downstream side of the anchor 110 and urges the anchor 110 to the upstream side; a guide portion forming section 102b that forms a guide portion 102bx that guides the spring 124; a first space portion V1 that is formed on the downstream side of the anchor 110 radially outward from the outer peripheral surface 113b of the valve body 113 to the position corresponding to the outer peripheral surface 110d of the anchor 110, and a second space portion V2 that is formed on the downstream side of the first space portion V1 radially outward from the outer peripheral surface 102b1 of the guide portion forming section 102b.
(FR)
La présente invention a pour but de fournir un dispositif d'injection de combustible permettant une injection de combustible à haute pression stable. À cet effet, le dispositif d'injection de combustible comprend : un corps de soupape 113; une ancre 110 qui déplace le corps de soupape 113 vers un côté en amont; un élément périphérique 102 qui entoure le corps de soupape 113 et l'ancre 110 depuis l'extérieur; un ressort 124 qui est disposé sur le côté en aval de l'ancre 110 et pousse l'ancre 110 vers le côté en amont; une section de formation de partie de guidage 102b qui forme une partie de guidage 102bx qui guide le ressort 124; une première partie d'espace V1 qui est formée sur le côté en aval de l'ancre 110 radialement vers l'extérieur à partir de la surface périphérique externe 113b du corps de soupape 113 jusqu'à la position correspondant à la surface périphérique externe 110d de l'ancre 110, et une seconde partie d'espace V2 qui est formée sur le côté en aval de la première partie d'espace V1 radialement vers l'extérieur à partir de la surface périphérique externe 102b1 de la section de formation de partie de guidage 102b.
(JA)
本発明の目的は、安定的な高圧燃料噴射が可能な燃料噴射装置を提供することにある。そのため燃料噴射装置は、弁体113と、弁体113を上流側に移動させるアンカー110と、弁体113及びアンカー110を周囲から囲む囲繞部材102と、アンカー110の下流側に配置されアンカー110を上流側に付勢するスプリング124と、スプリング124をガイドするガイド部102bxを形成するガイド部形成部102bと、アンカー110の下流側でかつ弁体113の外周面113bから径方向外側に向かってアンカー110の外周面110dに対応する位置まで形成される第1空間部V1と、第1空間部V1の下流側でかつガイド部形成部102bの外周面102b1から径方向外側に向かって形成される第2空間部V2と、を備える。
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