EP1838960A1 - Fuel injection nozzle - Google Patents
Fuel injection nozzleInfo
- Publication number
- EP1838960A1 EP1838960A1 EP05823534A EP05823534A EP1838960A1 EP 1838960 A1 EP1838960 A1 EP 1838960A1 EP 05823534 A EP05823534 A EP 05823534A EP 05823534 A EP05823534 A EP 05823534A EP 1838960 A1 EP1838960 A1 EP 1838960A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- nozzle
- fuel injection
- needle
- nozzle needle
- 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.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 35
- 238000002347 injection Methods 0.000 title claims abstract description 29
- 239000007924 injection Substances 0.000 title claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 20
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 230000007423 decrease Effects 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
Classifications
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- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
- F02M45/086—Having more than one injection-valve controlling discharge orifices
-
- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of 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
-
- 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
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/46—Valves, e.g. injectors, with concentric valve bodies
-
- 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
- F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion
- F02M2200/706—Valves for filling or emptying hydraulic chamber
-
- 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
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
- F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
-
- 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
- F02M63/00—Other 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
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0026—Valves characterised by the valve actuating means electrical, e.g. using solenoid using piezoelectric or magnetostrictive actuators
Definitions
- the invention is based on a fuel injection nozzle according to the preamble of patent claim 1.
- Such, for example, from DE 100 58 153 A1 known fuel injector for internal combustion engines has two nozzle needles that can be controlled independently.
- the outer nozzle needle is opened when the force exerted by the fuel on a pressure shoulder of the outer nozzle needle opening force is greater than the action of a closing spring.
- the inner nozzle needle is opened by the pressure of a force acting in the closing direction on the nozzle needle hydraulic fluid is lowered in a control chamber.
- the fuel injector according to the invention for internal combustion engines with the characterizing features of claim 1 has the advantage that the fuel injector is easy and directly controlled. By using a direct needle control both nozzle needles can be opened quickly controlled. Advantage of the invention is a simple construction of a direct needle control for a so-called KVD nozzle.
- FIGURE shows the fuel injection nozzle according to the invention in a longitudinal section.
- the fuel injector 1 for internal combustion engines shown in the figure has a one-piece or multi-piece, cylindrical nozzle body 2, which projects with its free lower end into a combustion chamber of the internal combustion engine not shown in detail.
- Nozzle body 2 is formed as a hollow needle outer nozzle needle 4 axially displaceably guided, in which an inner nozzle needle 5 is arranged coaxially and also guided axially displaceable.
- an annular space 6 is formed, which is bounded by the outer nozzle needle 4 radially inwardly.
- a high-pressure fuel line 7 the annular space 6 is connected to a high-pressure fuel storage (common rail), not shown.
- a first closing spring 8 presses the outer nozzle needle 4 into a first sealing seat 9 at the combustion chamber end of the bore 3. In the closed state of the outer nozzle needle 4 prevents a sealing cone 10 of the outer nozzle needle 4 in conjunction with the first sealing seat 9 that fuel from the annular space. 6 through first injection holes 11 in the
- a second closing spring 12 presses the inner nozzle needle 5 into a second sealing seat 13 at the combustion chamber end of the guide bore 3.
- a sealing cone 14 prevents the inner nozzle needle 5 in conjunction with the second
- Sealing seat 13 that when the outer nozzle needle 4 open fuel from the annular space 6 passes through second injection holes 15 in the combustion chamber of the internal combustion engine.
- the two sealing seats 9, 13 are formed by a common conical surface.
- the closing springs 8, 12 of the two nozzle needles 4, 5 are supported on a piston 16 which is guided axially displaceably in the bore 3 and in a translator piston 17 which is open at the bottom.
- the piezoelectric actuator 18 is energized, whereby the booster piston 17 is pressed against the action of a tension spring 19 down.
- the piston 16 is hydraulically coupled to the booster piston 17 via a fuel-filled booster space (coupling space) 20 to provide 1: 1 temperature compensation
- the booster chamber 20 is connected via a filling throttle 21 to the high-pressure supply line 7, so that there is rail pressure in the booster chamber 20.
- the outer nozzle needle 4 is guided displaceably on the piston 16.
- the piston 16 has a downwardly open piston chamber, at the chamber wall, the outer nozzle needle 4 is guided.
- the piston 16 engages with an annular projection 22, the outer nozzle needle 4 in the opening direction. In the shown closed state of the two
- Nozzle needles is the outer nozzle needle 4 in the opening direction on the projection 22 at.
- Each of the two nozzle needles 4, 5 delimits, with a control surface 23, 24 acting in the closing direction, in the piston chamber a nozzle rear space 25, which can be connected to the booster chamber 20 via a control valve 27 and is connected to a control chamber 29 via a throttle 28.
- the two springs 8, 12 are arranged in the nozzle rear space 25 and are supported on the piston 16.
- the control chamber 29 is bounded radially inwardly by the piston 16, radially outward by a sealing sleeve 30, in the opening direction by the booster piston 17 and in the closing direction by the nozzle body 2.
- the control chamber 27 is throttled to the fuel
- the piston 16 is axially displaceably guided in the bore 3 against the action of a closing spring 32 and has on the outside an annular groove 33 into which an annular projection 34 of the nozzle body 2 engages.
- Projection 34 defines on the one hand the closed position of the piston 16 shown in FIG. 1 and on the other hand the maximum opening stroke hi of the piston 16.
- the closing spring 32 is arranged in the booster chamber 20 and supported at the other end on the booster piston 17.
- the control valve 17 has a piston piston 16 axially displaceably guided valve piston 35 which has an acting in the valve closing direction end face 36 in the booster chamber 20 and at the opposite end a spherical valve closure member 37 carries.
- One on the valve piston 35th attacking closing spring 38 presses the valve closure member 37 in an annular sealing seat, which separates a valve chamber 39 and a nozzle back space 25 leading to the connecting channel 40 from each other.
- the valve chamber 39 is connected via a throttle 41 to the booster chamber 20.
- the closing spring 38 is arranged in the booster chamber 20 and supported at the other end on the booster piston 17.
- Nozzle needle 4 entrains in the opening direction.
- the outer nozzle needle 4 lifts off from its sealing seat 9, and via the now released first injection holes 1 1 fuel from the annular space 6 is injected into the combustion chamber.
- the opening stroke of the booster piston 17 leads to an increase in volume in the control chamber 29, so that the prevailing therein
- Nozzle needle 4 against the action of the closing spring. 8
- Nozzle needle 4 has in the closed state, when this rests with its sealing cone 10 on the sealing seat 9, a larger pressurized surface than the inner nozzle needle 5, if this with its sealing cone
- volume in the translator space 20 and the control room 29 is reduced.
- the pressure prevailing in the booster chamber 20 rises above the rail pressure, so that the control valve 17 closes.
- the prevailing in the control chamber 29 pressure increases above the rail pressure, and the nozzle needles 4, 5 close.
- control chamber 29 is not limited in the opening direction by the booster piston, but with the same operation by the piston.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004060550A DE102004060550A1 (en) | 2004-12-16 | 2004-12-16 | fuel Injector |
PCT/EP2005/056091 WO2006063918A1 (en) | 2004-12-16 | 2005-11-21 | Fuel injection nozzle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1838960A1 true EP1838960A1 (en) | 2007-10-03 |
EP1838960B1 EP1838960B1 (en) | 2010-01-13 |
Family
ID=35953945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05823534A Not-in-force EP1838960B1 (en) | 2004-12-16 | 2005-11-21 | Fuel injection nozzle |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1838960B1 (en) |
JP (1) | JP4518516B2 (en) |
AT (1) | ATE455241T1 (en) |
DE (2) | DE102004060550A1 (en) |
WO (1) | WO2006063918A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3846917B2 (en) * | 1995-07-13 | 2006-11-15 | 株式会社デンソー | Fuel injection device |
JP3327787B2 (en) * | 1996-09-25 | 2002-09-24 | 三菱重工業株式会社 | Two-fluid injection valve |
JP3932688B2 (en) * | 1997-08-28 | 2007-06-20 | 株式会社デンソー | Fuel injection device for internal combustion engine |
DE10058153A1 (en) | 2000-11-22 | 2002-06-06 | Bosch Gmbh Robert | Injection nozzle with separately controllable nozzle needles |
DE10246974A1 (en) * | 2002-10-09 | 2004-04-22 | Robert Bosch Gmbh | Fuel injector nozzle for use in internal combustion engine has needle and sleeve separately cutting off fuel flow to inner and outer nozzle bores |
DE10254186A1 (en) * | 2002-11-20 | 2004-06-17 | Siemens Ag | Injector with a directly driven register nozzle needle for fuel injection into an internal combustion engine |
DE10336327B4 (en) * | 2003-08-07 | 2016-03-17 | Robert Bosch Gmbh | Injector for fuel injection systems of internal combustion engines, in particular direct injection diesel engines |
-
2004
- 2004-12-16 DE DE102004060550A patent/DE102004060550A1/en not_active Withdrawn
-
2005
- 2005-11-21 WO PCT/EP2005/056091 patent/WO2006063918A1/en active Application Filing
- 2005-11-21 EP EP05823534A patent/EP1838960B1/en not_active Not-in-force
- 2005-11-21 DE DE502005008888T patent/DE502005008888D1/en active Active
- 2005-11-21 AT AT05823534T patent/ATE455241T1/en not_active IP Right Cessation
- 2005-11-21 JP JP2007546007A patent/JP4518516B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006063918A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE455241T1 (en) | 2010-01-15 |
EP1838960B1 (en) | 2010-01-13 |
WO2006063918A1 (en) | 2006-06-22 |
JP4518516B2 (en) | 2010-08-04 |
DE502005008888D1 (en) | 2010-03-04 |
JP2008523319A (en) | 2008-07-03 |
DE102004060550A1 (en) | 2006-07-06 |
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