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1. WO2001055578 - INJECTION NOZZLE

Publication Number WO/2001/055578
Publication Date 02.08.2001
International Application No. PCT/DE2001/000280
International Filing Date 25.01.2001
IPC
F02M 47/02 2006.1
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 59/46 2006.1
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
59Pumps specially adapted for fuel-injection and not provided for in groups F02M39/-F02M57/126
44Details, component parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02-F02M59/42165
46Valves
F02M 61/16 2006.1
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 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 61/167
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
167Means for compensating clearance or thermal expansion
F02M 61/18
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
18Injection nozzles, e.g. having valve seats; ; Details of valve member seated ends, not otherwise provided for
F02M 63/0026
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
0012Valves
0014characterised by the valve actuating means
0015electrical, e.g. using solenoid
0026using piezoelectric or magnetostrictive actuators
F02M 63/0036
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
0012Valves
0031characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
0033Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
0036with spherical or partly spherical shaped valve member ends
Applicants
  • ROBERT BOSCH GMBH [DE]/[DE] (AllExceptUS)
  • BOECKING, Friedrich [DE]/[DE] (UsOnly)
Inventors
  • BOECKING, Friedrich
Priority Data
100 03 863.828.01.2000DE
Publication Language German (de)
Filing Language German (DE)
Designated States
Title
(DE) EINSPRITZDÜSE
(EN) INJECTION NOZZLE
(FR) INJECTEUR
Abstract
(DE) Bei einer Einspritzdüse für ein Kraftstoff-Einspritzsystem, einer Einspritzdüse (10) für ein Kraftstoff-Einspritzsystem, mit einem Druckraum (26), der mit einem Fluideingang (24) und einem Fluidausgang (30) versehen ist, einem Ventilsitz (32) um den Fluidausgang herum, einem Ventilelement (34), das an dem Ventilsitz anliegen kann, so daß der Fluidausgang verschlossen ist, und einem Piezo-Aktor (40), der mit einem Betätigungsfortsatz (42) versehen ist, der an dem Ventilelement angreifen kann, soll eine Temperaturkompensation mit geringem Aufwand erzielt werden. Zu diesem Zweck ist vorgesehen, daß ein verschiebbares Wandteil (28) vorgesehen ist, an dem der Ventilsitz ausgebildet ist und das den Druckraum auf der Seite des Ventilsitzes begrenzt, und daß ein Temperaturausgleichselement (44) vorgesehen ist, das mit dem verschiebbaren Wandteil zusammenwirkt und dieses entsprechend einer temperaturbedingten Längenänderung des Piezo-Aktors verschiebt.
(EN) The invention relates to an injection nozzle (10) for a fuel injection system. The injection nozzle comprises a pressure space (26), which is provided with a fluid entry (24) and a fluid exit (30), and comprises a valve seat (32) around the fluid exit. The injection nozzle additionally comprises a valve element (34) which can rest on the valve seat in order to close the fluid exit, and comprises a piezo-actuator (40), which is provided with an actuating extension (42) that can act upon the valve element. The aim of the invention is to achieve a temperature compensation using little effort. To this end, a displaceable wall part (28) is provided on which the valve seat is configured and which borders the pressure space on the side of the valve seat. In addition, a temperature equalizing element (44) is provided which interacts with the displaceable wall part and which displaces the wall part according to a temperature-related change in length of the piezo-actuator.
(FR) L'invention concerne un injecteur (10) pour système d'injection de carburant, qui comprend une chambre de pression (26) comportant une entrée de fluide (24) et une sortie de fluide (30), un siège de soupape (32) autour de la sortie de fluide, un élément de soupape (34) pouvant reposer sur le siège de soupape, de sorte que la sortie de fluide soit fermée, ainsi qu'un actionneur piézo-électrique (40), muni d'un prolongement d'actionnement (42) pouvant agir sur l'élément de soupape. L'invention vise à parvenir à une compensation de la température, de manière peu complexe. A cet effet, il est prévu une partie de paroi déplaçable (28) sur laquelle est formé le siège de soupape et qui délimite la chambre de pression sur la face du siège de soupape. Il est également prévu un élément de compensation de la température (44) qui coopère avec la partie de paroi déplaçable qu'il déplace en fonction de variations de la longueur de l'actionneur piézo-électrique, dues à la température.
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