EP1887216B1 - Arrangement thermique de compensation dans une valve d'injection - Google Patents
Arrangement thermique de compensation dans une valve d'injection Download PDFInfo
- Publication number
- EP1887216B1 EP1887216B1 EP20060016135 EP06016135A EP1887216B1 EP 1887216 B1 EP1887216 B1 EP 1887216B1 EP 20060016135 EP20060016135 EP 20060016135 EP 06016135 A EP06016135 A EP 06016135A EP 1887216 B1 EP1887216 B1 EP 1887216B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- thermal compensation
- compensation arrangement
- front surface
- injection valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000002347 injection Methods 0.000 title claims description 29
- 239000007924 injection Substances 0.000 title claims description 29
- 239000012530 fluid Substances 0.000 claims description 36
- 238000002485 combustion reaction Methods 0.000 description 8
- 239000000446 fuel Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000004323 axial length Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/167—Means for compensating clearance or thermal expansion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/06—Fuel-injection apparatus having means for preventing coking, e.g. of fuel injector discharge orifices or valve needles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
- F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
Definitions
- the thermal compensation arrangement comprises a gap being formed in the recess and extending in radial direction between the lateral surface of the piston and the casing, a first piston channel being arranged in the piston and extending from the first front surface to the second front surface of the piston, and a second piston channel extending from the lateral surface to the first piston channel thereby enabling a fluid flow through the second piston channel between the gap and a recess section extending in axial direction between the first front surface of the piston and the casing.
- the thermal compensation unit 14 comprises a sealing element 50 arranged in a piston rest 51 being part of the casing 45 and supporting the piston 46 in an initial state of the thermal compensation unit 14 as described below.
- the piston 46 of the thermal compensation arrangement 14 is forced to move in a second piston movement direction P2 ( Fig. 4 ) towards the sealing element 50.
- P2 Fig. 4
- the movement of the piston 46 creates a pressure wave in the fluid being in the first piston channel 61a which opens the flap 64. By this fluid flows through the first piston channel 61a into the recess section 66 between the first front surface 58 of the piston 46 and the casing 54.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Claims (4)
- Dispositif de compensation thermique (14) pour une soupape d'injection (10), la soupape d'injection (10) comprenant- un boîtier (12) définissant un axe longitudinal central (A), ce boîtier (12) comportant une cavité (24),- une aiguille de soupape (22) déplaçable axialement dans la cavité (24), et- une unité d'actionnement (16) couplée à l'aiguille de soupape (22) et permettant d'en assurer le mouvement axial par rapport au boîtier (12) après une activation de l'unité d'actionnement (16),le dispositif de compensation thermique (14) comprenant- un fourreau (45) qui peut être couplé au boîtier (12) et qui définit une cavité (54),- un piston (46) qui peut se déplacer axialement dans la cavité (54) et être couplé à l'unité d'actionnement (16), ce piston (46) présentant une surface latérale (60), une première face frontale (58) faisant face à la direction axiale et une seconde face frontale (59) faisant face à la direction axiale mais en sens opposé par rapport à la première face frontale (58),- une fente (65) formée dans la cavité (54) et s'étendant en direction radiale entre la surface latérale (60) du piston et le fourreau (45),- un premier passage de piston (61a) ménagé dans le piston (46) en s'étendant à partir de la première face frontale (58) vers la seconde face frontale (59) du piston (46),caractérisé en ce que la soupape d'injection (10) comprend- un second passage de piston (61b) s'étendant à partir de la surface latérale (60) vers le premier passage de piston (61a) pour permettre un écoulement de fluide à travers le second passage de piston (61b) entre la fente (65) et la partie de cavité (66) s'étendant axialement entre la première face frontale (58) du piston (46) et le fourreau (45).
- Dispositif de compensation thermique (14) selon la revendication 1, comprenant une rainure (62) agencée dans la surface latérale (60) du piston (46) et couplée hydrauliquement au second passage de piston (61b).
- Dispositif de compensation thermique (14) selon la revendication 2, dans lequel la rainure (62) s'étend autour de la surface latérale (60) du piston (46).
- Soupape d'injection (10) comprenant un dispositif de compensation thermique (14) selon l'une des revendications précédentes.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200660011604 DE602006011604D1 (de) | 2006-08-02 | 2006-08-02 | Anordnung zum thermischen Ausgleich in einem Einspritzventil |
EP20060016135 EP1887216B1 (fr) | 2006-08-02 | 2006-08-02 | Arrangement thermique de compensation dans une valve d'injection |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20060016135 EP1887216B1 (fr) | 2006-08-02 | 2006-08-02 | Arrangement thermique de compensation dans une valve d'injection |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1887216A1 EP1887216A1 (fr) | 2008-02-13 |
EP1887216B1 true EP1887216B1 (fr) | 2010-01-06 |
Family
ID=37502181
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20060016135 Expired - Fee Related EP1887216B1 (fr) | 2006-08-02 | 2006-08-02 | Arrangement thermique de compensation dans une valve d'injection |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1887216B1 (fr) |
DE (1) | DE602006011604D1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2110199B1 (fr) | 2008-04-18 | 2013-04-10 | Continental Automotive GmbH | Ensemble ajusté à interférence et procédé de production d'un ensemble ajusté à interférence |
EP2141346B1 (fr) * | 2008-07-03 | 2011-01-19 | Continental Automotive GmbH | Agencement de compensation thermique et soupape d'injection |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002031349A1 (fr) * | 2000-10-11 | 2002-04-18 | Siemens Vdo Automotive Corporation | Ensemble compensateur muni d'une soupape sensible a la pression destine a etre accouple a un actionneur a solide situe dans un injecteur de carburant |
DE60204565T2 (de) * | 2002-08-20 | 2005-11-03 | Siemens Vdo Automotive S.P.A., Fauglia | Dosiergerät mit Thermalkompensationseinheit |
DE10343017A1 (de) * | 2003-09-17 | 2005-04-14 | Robert Bosch Gmbh | Brennstoffeinspritzventil |
DE602005005242T2 (de) * | 2004-04-26 | 2009-04-02 | Isuzu Motors Ltd. | Längen-Ausgleichselement und dieses enthaltendes Kraftstoff-Einspritzventil |
-
2006
- 2006-08-02 DE DE200660011604 patent/DE602006011604D1/de active Active
- 2006-08-02 EP EP20060016135 patent/EP1887216B1/fr not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE602006011604D1 (de) | 2010-02-25 |
EP1887216A1 (fr) | 2008-02-13 |
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