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1. WO2017025220 - FUEL INJECTOR

Publication Number WO/2017/025220
Publication Date 16.02.2017
International Application No. PCT/EP2016/063171
International Filing Date 09.06.2016
IPC
F02M 61/12 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
61Fuel injectors not provided for in groups F02M39/-F02M57/94
04having valves
10Other injectors with elongated valve bodies, i.e. of needle-valve type
12characterised by the provision of guiding or centring means for valve bodies
F02M 47/02 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
47Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
02of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves, and having means for periodically releasing that closing pressure
CPC
F02M 2200/02
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
2200Details of fuel-injection apparatus, not otherwise provided for
02Fuel-injection apparatus having means for reducing wear
F02M 2200/16
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
2200Details of fuel-injection apparatus, not otherwise provided for
16Sealing of fuel injection apparatus not otherwise provided for
F02M 2547/003
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
2547Special features for fuel-injection valves actuated by fluid pressure
003Valve inserts containing control chamber and valve piston
F02M 47/027
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
47Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
02of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
027Electrically actuated valves draining the chamber to release the closing pressure
F02M 61/12
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
61Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
04having valves ; , e.g. having a plurality of valves in series
10Other injectors with elongated valve bodies, i.e. of needle-valve type
12characterised by the provision of guiding or centring means for valve bodies
Applicants
  • ROBERT BOSCH GMBH [DE]/[DE]
Inventors
  • OLEMS, Lars
  • MERTIN, Frank
Priority Data
10 2015 215 321.511.08.2015DE
Publication Language German (DE)
Filing Language German (DE)
Designated States
Title
(DE) KRAFTSTOFFINJEKTOR
(EN) FUEL INJECTOR
(FR) INJECTEUR DE CARBURANT
Abstract
(DE)
Die Erfindung bezieht sich auf einen Kraftstoffinjektor (10) zum Einspritzen von Kraftstoff in den Brennraum einer Brennkraftmaschine. Der Kraftstoffinjektor (10) umfasst ein in einem Haltekörper (12) angeordnetes, im Wesentlichen zylindrisches Einspritzventilglied (18). Das Einspritzventilglied (18) weist in einem Endbereich eine Führungsfläche (18a) auf, wobei die Führungsfläche (18a) in einer in einem Ventilstück (22) ausgebildeten Führungsbohrung (30) längsbeweglich geführt ist. Das Ventilstück (22) ist mit dem Haltekörper (12) verspannt. Das Einspritzventilglied (18) öffnet und schließt durch seine Längsbewegung Einspritzöffnungen (21) in den Brennraum. Die Einspritzöffnungen (21) sind benachbart zu dem der Führungsfläche (18a) gegenüberliegenden Ende des Einspritzventilglieds (18) angeordnet. Die Führungsfläche (18a) weist im Längsschnitt eine konvexe Form auf.
(EN)
The invention relates to a fuel injector (10) for injecting fuel into the combustion chamber of an internal combustion engine. The fuel injector (10) comprises a substantially cylindrical injection valve member (18) which is arranged in a holding body (12). The injection valve member (18) has a guide surface (18a) in an end region, the guide surface (18a) being guided longitudinally movably in a guide bore (30) which is configured in a valve piece (22). The valve piece (22) is braced with the holding body (12). By way of the longitudinal movement thereof, the injection valve member (18) opens and closes injection openings (21) into the combustion chamber. The injection openings (21) are arranged adjacently with respect to that end of the injection valve member (18) which lies opposite the guide surface (18a). The guide surface (18a) has a convex shape in longitudinal section.
(FR)
L'invention concerne un injecteur de carburant (10) servant à injecter du carburant dans la chambre de combustion d'un moteur à combustion interne. L'injecteur de carburant (10) comprend une soupape d'injection (18) sensiblement cylindrique disposée dans un corps de maintien (12). La soupape d'injection (18) comporte dans une zone d'extrémité une surface de guidage (18a) qui est guidée de manière mobile dans le sens de la longueur dans un perçage de guidage (30) pratiqué dans un élément soupape (22). L'élément soupape (22) est bloqué avec le corps de maintien (12). La soupape d'injection (18) ouvre et ferme par son mouvement longitudinal des orifices d'injection (21) dans la chambre de combustion. Les orifices d'injection (21) sont adjacents à l'extrémité de la soupape d'injection (18) opposée à la surface de guidage (18a). La surface de guidage (18a) présente une forme convexe en coupe longitudinale.
Also published as
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