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WO1996010129A1 - Soupape d'injection - Google Patents

Soupape d'injection Download PDF

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Publication number
WO1996010129A1
WO1996010129A1 PCT/DE1995/001317 DE9501317W WO9610129A1 WO 1996010129 A1 WO1996010129 A1 WO 1996010129A1 DE 9501317 W DE9501317 W DE 9501317W WO 9610129 A1 WO9610129 A1 WO 9610129A1
Authority
WO
WIPO (PCT)
Prior art keywords
injection
needle
pressure
driver
spring
Prior art date
Application number
PCT/DE1995/001317
Other languages
German (de)
English (en)
Inventor
Wendelin KLÜGL
Detlev SCHÖPPE
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP95931910A priority Critical patent/EP0783625A1/fr
Publication of WO1996010129A1 publication Critical patent/WO1996010129A1/fr

Links

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
    • 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
    • F02M47/027—Electrically actuated valves draining the chamber to release the 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
    • 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
    • F02M45/083—Having two or more closing springs acting on injection-valve
    • 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
    • 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
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0045—Three-way valves

Definitions

  • the invention relates to an injection valve according to the preamble of claim 1.
  • Such a valve is known, for example, from US Pat. No. 4,258,674.
  • a valve is shown in FIG. 2, in which a compression spring is arranged in a space behind the injection needle, so that when injection is to be carried out, the injection needle is pressed against the force of the compression spring.
  • Appropriate dimensioning of the compression spring allows the injection course to be shaped within certain limits, in particular delayed.
  • the injection process In order to improve the engine values of internal combustion engines, in particular the exhaust gas values, it is desirable for the injection process to be malleable. In other words, when an injection valve is actuated, the
  • Injection does not occur abruptly, but have a desired injection profile adapted to the internal combustion engine.
  • valves in particular for diesel internal combustion engines, should be designed such that pre-injection before the main injection is possible in order to further improve the exhaust gas behavior.
  • a first and a second compression spring come into effect, through which the Control the opening process of the injection needle.
  • the spring forces can also be adjusted by means of adjusting disks which can be inserted into the spring spaces, so that the injection course can be shaped to a large extent by the invention.
  • a pre-injection can be achieved if only the first compression spring comes into effect during a pre-injection, while in the case of a main injection both compression springs form the course of the injection.
  • the injection valve shown in the figure consists of an elongated housing 1, on whose lower end a union nut 2 is screwed on. With this union nut 2, an intermediate washer 4 and an injection nozzle housing 3, in which the
  • Injection needle 5 is held. Both the intermediate disk 4 and the injection nozzle housing 3 have a central bore in which the injection needle 5 can be displaced axially. In the state shown, the injection needle 5 lies at one end on an annular nozzle seat 6, so that the nozzle holes 7, 8 arranged in this area are not supplied with fuel.
  • a pressure pin 9 which runs in the longitudinal axis of the housing 1 and bears against a guide part 10, engages the lower end of the injection needle 5.
  • This guide part acts on a first spring 11, which rests on a first adjusting disk 39, and further on a plunger 12 of a locking bolt 13, which is connected to a valve chamber 15 via a bore 14.
  • a valve needle 16 provided with two seat surfaces, which in turn is connected to a bolt 17 which is in the upper part of the housing 1 is guided and is connected to a magnet armature 18 which is arranged in a magnet armature space 19.
  • a return spring 20 acts on the magnet armature 18 and is guided in a magnet coil 21, the electrical connections 22, 23 of which are guided to the outside.
  • a further second spring 25 is arranged in a further recess 24, which surrounds the pressure pin 9 and rests on one side against an adjusting disk 26.
  • the second spring 25 rests on a spring contact disk 27, on which a driver 28 acts, which is axially displaceably mounted in the intermediate disk 4.
  • the driver 28 has an annular extension 29 which bears against the injection housing 3.
  • the opposite side of the driver 28 bears against the spring contact disk 27.
  • the pressure pin 9 is passed axially through the spring contact disk 27 as well as through the driver 28.
  • the driver 28 has a recess in the area of its annular projection 29, which forms a first annular gap 30 for a first stroke. Furthermore, a second annular gap 31 is formed between the intermediate disk 4 and the driver 28 for a second stroke.
  • the injection needle 5 is designed so that it rests on the pressure pin in the region of the first annular gap.
  • the fuel is fed into the valve chamber 15 via an inlet channel 32.
  • a channel 33 is also provided, via which the fuel is guided to a shoulder 34 of the injection needle 5.
  • a return 35 for the fuel supplied via the inlet channel 32 which is connected via a throttle bore 36 to the lower seat of the valve needle 16.
  • the return 35 is further connected via a channel 37 to the magnet armature chamber 19 and to a spring chamber 38 in which the first spring 11 is arranged.
  • Injection is initiated by energizing solenoid 21.
  • the magnet coil 21 When the magnet coil 21 is energized, the magnet armature 18 is attracted, as a result of which the valve needle 16 is moved upward into its upper seat via the bolt 17. This closes the fuel inlet connection for the valve chamber 15 and the lower seat is free, so that the space behind the closing piston 13 is connected to the return 35 via the bore 14 and 36.
  • the area of the return has only a very low pressure. Since the high pressure of the fuel continues to be applied via the channel 33 to the annular shoulder 34 of the injection needle 5, a pressure imbalance arises, as a result of which the injection needle 5 is displaced upwards and the nozzle seat of the injection needle 5 is released for injection.
  • the opening process takes place in two stages.
  • a first stage the injection needle 5 rests on the end face of the pressure pin 9 and moves it upward against the force of the first spring 11. This process is continued until the end face of the injection needle 5 is at the bottom of the annular extension 29 of the driver 28 after overcoming the first
  • Annular gap 30 comes to the plant. With a further upward movement, the driver 28 is now also moved upward. shifted against the force of the second spring 25 until a second annular gap 31 is overcome and the driver 28 comes to rest with a shoulder on the fixed intermediate disk 4. At this point in time, the nozzle seat 6 is fully open.
  • the course of the injection can be shaped, i.e. the opening process of the injection needle 5 is decisive for the time course of the injection quantity of the fuel.
  • the lifting of the injection needle 5 can be slowed down by designing the throttle bore 36 accordingly, which is desirable for a softer injection at the start of injection. Since the throttle bore 36 is arranged behind the lower valve seat of the valve needle 16, the opening process of the injection needle 5 can be slowed down, but the closing process can take place quickly if the bore 14, which forms the inlet to the closing piston 13, is dimensioned sufficiently large.
  • the opening process of the injection needle can be shaped with the springs 11 and 25.
  • the injection needle 5 moves against the force of the first spring 11, the pressure pin 9 pressing on the guide part 10 until the end face of the injection needle 5 comes to rest on the bottom of the annular extension 29 of the driver 28.
  • the biasing force of the first spring 11 can be fixed by a first shim 39.
  • the second spring 25 also has an adjustable pretensioning force, which can be fixed via a further adjusting disk 26. After the end of the first injection phase, the driver 28 is now also moved upward, specifically against the force of the second spring 25, until the driver 28 comes to rest with its flange on the intermediate disk 4. O 96/10129
  • the two springs 11 and 25 support the closing process of the injection needle 5 when the energization of the solenoid coil 21 is ended and the return line 36 is thus closed.
  • the spring forces of the springs 11 and 25 can be designed such that only the stroke of the first opening phase is largely used for a pre-injection quantity. Furthermore, the springs form an additional security with which the injection needle can be brought into its closed position if the high pressure of the fuel should decrease due to any occurrence.

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

L'invention concerne une soupape d'injection présentant une arrivée à haute pression (32), un retour à basse pression (35), un pointeau de soupape (16), un pointeau d'injection (5) ainsi qu'un dispositif à ressort qui sollicite le pointeau d'injection (5) dans le sens de son siège d'injecteur. La soupape est conçue de sorte que le déroulement de l'injection puisse être adapté. A cet effet, le dispositif à ressort est formé de deux ressorts à pression successifs (25, 11) qui peuvent être commandés successivement par un dispositif d'entraînement (28). L'invention peut être appliquée dans les moteurs à combustion interne.
PCT/DE1995/001317 1994-09-29 1995-09-22 Soupape d'injection WO1996010129A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95931910A EP0783625A1 (fr) 1994-09-29 1995-09-22 Soupape d'injection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4434892.4 1994-09-29
DE19944434892 DE4434892A1 (de) 1994-09-29 1994-09-29 Einspritzventil

Publications (1)

Publication Number Publication Date
WO1996010129A1 true WO1996010129A1 (fr) 1996-04-04

Family

ID=6529559

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/001317 WO1996010129A1 (fr) 1994-09-29 1995-09-22 Soupape d'injection

Country Status (3)

Country Link
EP (1) EP0783625A1 (fr)
DE (1) DE4434892A1 (fr)
WO (1) WO1996010129A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5884848A (en) * 1997-05-09 1999-03-23 Cummins Engine Company, Inc. Fuel injector with piezoelectric and hydraulically actuated needle valve
US5979803A (en) * 1997-05-09 1999-11-09 Cummins Engine Company Fuel injector with pressure balanced needle valve
DE10134529A1 (de) * 2001-07-16 2003-02-13 Bosch Gmbh Robert Injektor mit hintereinandergeschalteten, nach innen öffnenden Ventilen

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0741244B1 (fr) * 1995-05-03 1999-07-07 DaimlerChrysler AG Injecteur
US5779149A (en) * 1996-07-02 1998-07-14 Siemens Automotive Corporation Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke
DE19729844A1 (de) * 1997-07-11 1999-01-14 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung
US6079641A (en) 1998-10-13 2000-06-27 Caterpillar Inc. Fuel injector with rate shaping control through piezoelectric nozzle lift
GB9823134D0 (en) * 1998-10-23 1998-12-16 Lucas Ind Plc Valve
DE19921242C1 (de) 1999-05-07 2000-10-26 Siemens Ag Verfahren zum Positionieren des Stellantriebs in einem Kraftstoffinjektor und Vorrichtung zur Durchführung des Verfahrens
DE19936942A1 (de) 1999-08-05 2001-02-08 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10059009A1 (de) 2000-11-28 2002-05-29 Bosch Gmbh Robert Brennstoffeinspritzanlage
DE10101797A1 (de) * 2001-01-17 2002-07-18 Bosch Gmbh Robert Einspritzventil

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3712310A1 (de) * 1986-04-11 1987-10-29 Nippon Denso Co In einer kraftstoffeinspritzvorrichtung fuer eine brennkraftmaschine verwendetes kraftstoffeinspritzventil
EP0304747A1 (fr) * 1987-08-25 1989-03-01 WEBER S.r.l. Soupape à injection de combustible commandée électromagnétiquement pour moteurs diesel
DE4001103A1 (de) * 1990-01-17 1991-07-18 Daimler Benz Ag Kraftstoffeinspritzventil fuer luftverdichtende direkteinspritzende brennkraftmaschinen
WO1993015310A1 (fr) * 1992-01-28 1993-08-05 Servojet Electronic Systems Ltd. Systeme d'injection de carburant a accumulateur
EP0582993A1 (fr) * 1992-08-11 1994-02-16 Nippondenso Co., Ltd. Dispositif d'injection de carburant avec accumulateur

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107817A (en) * 1960-05-31 1963-10-22 American Mach & Foundry Cigarette package with a cigarette ejector
DE2711393A1 (de) * 1977-03-16 1978-09-21 Bosch Gmbh Robert Kraftstoffeinspritzduese
DE2909307A1 (de) * 1979-03-09 1980-09-18 Inst Motorenbau Prof Huber E V Kraftstoff-einspritzsystem mit kontinuierlicher foerderung und intermittierender einspritzung
US4258674A (en) * 1979-03-28 1981-03-31 Wolff George D Engine fuel injection system
DE3610658A1 (de) * 1985-11-21 1987-05-27 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE4011782A1 (de) * 1989-04-11 1990-10-31 Toyota Motor Co Ltd Steuerschaltung fuer eine brennstoffeinspritzvorrichtung
CH686845A5 (de) * 1993-03-08 1996-07-15 Ganser Hydromag Steueranordnung fuer ein Einspritzventil fuer Verbrennungskraftmaschinen.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3712310A1 (de) * 1986-04-11 1987-10-29 Nippon Denso Co In einer kraftstoffeinspritzvorrichtung fuer eine brennkraftmaschine verwendetes kraftstoffeinspritzventil
EP0304747A1 (fr) * 1987-08-25 1989-03-01 WEBER S.r.l. Soupape à injection de combustible commandée électromagnétiquement pour moteurs diesel
DE4001103A1 (de) * 1990-01-17 1991-07-18 Daimler Benz Ag Kraftstoffeinspritzventil fuer luftverdichtende direkteinspritzende brennkraftmaschinen
WO1993015310A1 (fr) * 1992-01-28 1993-08-05 Servojet Electronic Systems Ltd. Systeme d'injection de carburant a accumulateur
EP0582993A1 (fr) * 1992-08-11 1994-02-16 Nippondenso Co., Ltd. Dispositif d'injection de carburant avec accumulateur

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5884848A (en) * 1997-05-09 1999-03-23 Cummins Engine Company, Inc. Fuel injector with piezoelectric and hydraulically actuated needle valve
US5979803A (en) * 1997-05-09 1999-11-09 Cummins Engine Company Fuel injector with pressure balanced needle valve
DE10134529A1 (de) * 2001-07-16 2003-02-13 Bosch Gmbh Robert Injektor mit hintereinandergeschalteten, nach innen öffnenden Ventilen
DE10134529C2 (de) * 2001-07-16 2003-07-03 Bosch Gmbh Robert Injektor mit hintereinandergeschalteten, nach innen öffnenden Ventilen

Also Published As

Publication number Publication date
DE4434892A1 (de) 1996-04-11
EP0783625A1 (fr) 1997-07-16

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