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1. EP1125043 - FLAT TUBULAR PRESSURE DAMPER FOR DAMPING FLUID PRESSURE OSCILLATIONS IN FLUID LINES

Office European Patent Office
Application Number 00952917
Application Date 11.07.2000
Publication Number 1125043
Publication Date 22.08.2001
Publication Kind B1
IPC
F02M 37/00
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
37Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
F02M 55/02
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
55Fuel-injection apparatus characterised by their fuel conduits or their venting means
02Conduits between injection pumps and injectors
F02M 55/04
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
55Fuel-injection apparatus characterised by their fuel conduits or their venting means
04Means for damping vibrations in injection-pump inlets
F02M 63/00
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
63Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/-F02M57/143; Details, component parts or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/-F02M61/193
F02M 63/02
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
63Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/-F02M57/143; Details, component parts or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/-F02M61/193
02Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
F02M 65/00
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
65Testing fuel-injection apparatus, e.g. testing injection timing
CPC
F02M 37/0041
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
37Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
0011Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
0041Means for damping pressure pulsations
F02M 37/0047
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
37Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
0047Layout or arrangement of systems for feeding fuel
F02M 55/025
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
55Fuel-injection apparatus characterised by their fuel conduits or their venting means; ; Arrangements of conduits between fuel tank and pump F02M37/00
02Conduits between injection pumps and injectors ; , e.g. conduits between pump and common-rail or conduits between common-rail and injectors
025Common rails
F02M 55/04
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
55Fuel-injection apparatus characterised by their fuel conduits or their venting means; ; Arrangements of conduits between fuel tank and pump F02M37/00
04Means for damping vibrations ; or pressure fluctuations; in injection pump inlets ; or outlets
F02M 63/0225
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
63Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; ; Combination of fuel pump with other devices, e.g. lubricating oil pump
02Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
0225Fuel-injection apparatus having a common rail feeding several injectors
F02M 69/465
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
69Low-pressure fuel-injection apparatus ; ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
46Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
462Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
465of fuel rails
Applicants BOSCH GMBH ROBERT
Inventors SCHWEGLER HELMUT
MAIER MARTIN
Designated States
Priority Data 0002251 11.07.2000 DE
19934357 22.07.1999 DE
Title
(DE) FLACHROHRDRUCKDÄMPFER ZUR DÄMPFUNG VON FLÜSSIGKEITS-DRUCKSCHWINGUNGEN IN FLÜSSIGKEITSLEITUNGEN
(EN) FLAT TUBULAR PRESSURE DAMPER FOR DAMPING FLUID PRESSURE OSCILLATIONS IN FLUID LINES
(FR) ATTENUATEUR DE PRESSION TUBULAIRE PLAT POUR ATTENUER DES VARIATIONS DE PRESSION DE LIQUIDES DANS DES CONDUITES DE LIQUIDES
Abstract
(DE)
Die Erfindung betrifft einen Flachrohrdruckdämpfer (1) zur Dämpfung von Flüssigkeits-Druckschwingungen in Flüssigkeitsleitungen, insbesondere von Kraftstoff-Druckschwingungen in Kraftstoffversorgungsleitungen von Kraftfahrzeugen, mit mindestens einer länglichen Kammer (24), deren Querschnitt klein gegenüber ihrer Längserstreckung ist und von welcher mindestens ein Teil der Kammerwand (26) mit der Flüssigkeit in Wirkverbindung stehend durch die Flüssigkeits-Druckschwingungen elastisch verformbar ist. Die Erfindung sieht vor, daß entlang der Längserstreckung der Kammer (24) gesehen sich deren Querschnitt kontinuierlich oder stufenweise ändert.

(EN)
The invention relates to a flat tubular pressure damper (1) for damping fluid pressure oscillations in fluid lines, in particular, fuel pressure oscillations in motor vehicle fuel supply lines. Said damper comprises at least one oblong chamber (24) whose cross-section is small compared to its longitudinal extension, and of which at least a portion of the chamber wall (26) which is actively in contact with the fluid can be elastically deformed by the fluid pressure oscillations. The invention provides that the cross-section of the chamber (24), when viewed along the longitudinal extension of the same, varies continuously or progressively.

(FR)
L'invention concerne un atténuateur de pression tubulaire plat (1) pour atténuer des variations de pression de liquides dans des conduites de liquides, notamment des variations de pression de carburant dans des conduites de carburant d'automobiles. Cet atténuateur de pression tubulaire plat comprend au moins une chambre oblongue (24) dont la section transversale est petite comparativement à son extension longitudinale et depuis laquelle au moins une partie de la paroi de la chambre (26) qui coopère avec le liquide concerné peut être soumise à une déformation élastique sous l'effet de variations de pression du liquide. Selon l'invention, il est prévu que vue le long de l'extension longitudinale de la chambre (24), sa section transversale varie en continu ou progressivement.