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1. WO2020136025 - A FUEL FLOW PATH FOR A VALVE GROUP OF A FUEL INJECTOR

Publication Number WO/2020/136025
Publication Date 02.07.2020
International Application No. PCT/EP2019/085150
International Filing Date 13.12.2019
IPC
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
F02M 61/16 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
16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02-F02M61/14132
CPC
F02M 2200/04
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
04Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion
F02M 2200/28
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
28Details of throttles in fuel-injection apparatus
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 61/168
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
16Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
168Assembling; Disassembling; Manufacturing; Adjusting
Applicants
  • ROBERT BOSCH GMBH [DE]/[DE]
Inventors
  • KAYAKOL, Nuray
Priority Data
2018/2074927.12.2018TR
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A FUEL FLOW PATH FOR A VALVE GROUP OF A FUEL INJECTOR
(FR) TRAJET D'ÉCOULEMENT DE CARBURANT POUR UN GROUPE DE SOUPAPES D'UN INJECTEUR DE CARBURANT
Abstract
(EN)
A fuel injector (10) having a fuel flow path having a total length (H) between a valve seat (41) and a fuel pressure control chamber (50) comprising a length (L1) of an A-throttle (32), a distance (L2) between the A-throttle (32) and the valve seat (41) and a length (L3) of a pre-hole (31). The fuel flow path is arranged by shortening a length (L3) of the pre-hole (31) and arranged by elongating a sum of the length (L1) of the A-throttle (32) and of the distance (L2) between the A-throttle (32) and the valve seat (41) in a constant total length (H) of the fuel flow path between the valve seat (41) and the fuel pressure control chamber (50) in order to decrease L1/L2 ratio.
(FR)
La présente invention concerne un injecteur de carburant (10) ayant un trajet d'écoulement de carburant ayant une longueur totale (H) entre un siège de soupape (41) et une chambre de commande de pression de carburant (50) comprenant une longueur (L1) d'un papillon des gaz (32), une distance (L2) entre le papillon des gaz (32) et le siège de soupape (41) et une longueur (L3) d'un pré-trou (31). Le trajet d'écoulement de carburant est agencé en raccourcissant une longueur (L3) du pré-trou (31) et agencé en allongeant une somme de la longueur (L1) du papillon des gaz (32) et de la distance (L2) entre le papillon des gaz (32) et le siège de soupape (41) dans une longueur totale constante (H) du trajet d'écoulement de carburant entre le siège de soupape (41) et la chambre de commande de pression de carburant (50) afin de diminuer le rapport L1/L2.
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