EP3655641A1 - Injecteur pour l'injection de carburant - Google Patents

Injecteur pour l'injection de carburant

Info

Publication number
EP3655641A1
EP3655641A1 EP18743521.9A EP18743521A EP3655641A1 EP 3655641 A1 EP3655641 A1 EP 3655641A1 EP 18743521 A EP18743521 A EP 18743521A EP 3655641 A1 EP3655641 A1 EP 3655641A1
Authority
EP
European Patent Office
Prior art keywords
injector
magnetic
housing
coil winding
injector housing
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
Application number
EP18743521.9A
Other languages
German (de)
English (en)
Other versions
EP3655641B1 (fr
Inventor
Norbert SCHÖFBÄNKER
Richard Pirkl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Liebherr Components Deggendorf GmbH
Original Assignee
Liebherr Components Deggendorf GmbH
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 Liebherr Components Deggendorf GmbH filed Critical Liebherr Components Deggendorf GmbH
Publication of EP3655641A1 publication Critical patent/EP3655641A1/fr
Application granted granted Critical
Publication of EP3655641B1 publication Critical patent/EP3655641B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F02M63/0019—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of electromagnets or fixed armatures
    • 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
    • F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/081—Magnetic constructions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1638—Armatures not entering the winding
    • 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
    • F02M2200/90—Selection of particular materials
    • F02M2200/9053—Metals

Definitions

  • the present invention relates to an injector for injecting fuel.
  • fuel is usually injected via an injector with a certain amount and for a certain period of time into a combustion chamber. It is due to the very low injection durations, which are in microseconds range, required to open the outlet of the injector at a very high frequency or close.
  • An injector typically has a nozzle needle (also called an injector needle) that allows a high pressure fuel to escape when an exit hole of the injector is released.
  • This nozzle needle acts in conjunction with this outlet opening like a plug, which allows a lifting of the fuel when lifting. Accordingly, it is therefore necessary to lift this needle in relatively short time intervals and to let slide back into the outlet opening after a short time.
  • This can be hydraulic
  • Servo valves are used, which control the triggering of this movement. Such valves in turn are controlled by means of an electromagnet.
  • so-called servo valves are used instead of the direct control, which control the nozzle needle and are themselves controlled by a solenoid valve.
  • a pressure level which acts on the nozzle needle in the closing direction is established in a control space cooperating with the nozzle needle with the aid of the fuel which is available under high pressure.
  • This control chamber is typically connected via an inlet throttle to the high-pressure region of the fuel.
  • this control chamber has a small closable outlet throttle, from which the fuel can escape. If this is done, the pressure in the control chamber and the closing force acting on the nozzle needle are reduced because the high-pressure fuel of the control chamber can flow off. This leads to a movement of the nozzle needle, which releases the outlet opening at the injector tip.
  • the outlet throttle of the valve with the aid of an anchor element is optionally closed or opened.
  • the injector for injecting fuel according to the invention comprises an injector housing for accommodating at least one injector component and an electromagnet for driving a valve for opening and closing the injector, the solenoid having a coil winding and a magnetic body.
  • the injector according to the invention is characterized in that the injector is formed integrally with the magnetic body.
  • the coil winding is mounted directly on the injector housing, preferably, the coil winding is wound around an outer peripheral surface of the injector.
  • the magnetic body has a magnetic inner pole provided inside the coil winding and a magnetic outer pole provided outside the coil winding, the injector housing being integrally connected to the magnetic inner pole and / or the magnetic outer pole.
  • the injector is formed integrally with the Magnetinnenpol or with the Magnetau solidpol. It is further encompassed by the invention that both the magnetic inner pole and the magnetic outer pole are formed integrally with the injector housing.
  • the injector housing comprises or consists of a Cr-Mo alloyed tempering steel, wherein preferably the Cr-Mo alloyed tempering steel is 50CrMo4.
  • tempered 50CrMo4 represents the optimum in terms of high pressure shock resistance and the magnetic properties.
  • the first injector housing comprises a first injector housing section and a second injector housing section, and one of the two injector housing sections is integrally connected to the magnet body or both injector housing sections are integrally connected to the magnet body.
  • Dividing the injector housing into several sections makes assembling and assembling the injector easier.
  • the coil winding of the electromagnet is mounted directly on the first injector housing section and is preferably wound around an outer peripheral surface of the first injector housing section.
  • the coil winding can come into direct contact with the first injector housing section.
  • the injector further comprises a valve for applying a variable pressure to an injector needle, the second injector housing portion being adjacent to the valve.
  • This valve has an outlet throttle, which can be closed by means of an armature element movably mounted in the injector. In a closed state of the valve, so much pressure is exerted on the injector needle that it closes the injector outlet. On the other hand, if the outlet throttle opens by lifting off the anchor element, the pressure level drops and allows the injector needle to be raised from its closed position. Furthermore, it can be provided that the second injector housing section supports the anchor element for selectively closing the outlet throttle.
  • the second Injektorgepurabites is integrally connected to a part of the magnetic body provided outside the coil winding. It is advantageous if the portion of the magnet body provided outside the coil winding directly adjoins the coil winding.
  • the first Injektorgekoruseabites is integrally connected to a provided within the coil winding part of the magnetic body.
  • the injector further comprises an anchor element for selectively closing a valve opening, wherein the anchor element is movable by the electromagnet.
  • the armature element is moved in a current-fed state of the electromagnet into a position in which the armature element forms a magnetic circuit together with a magnet inner pole and a magnet outer pole of the magnet body.
  • the anchor element in this position which is achieved in an energized state of the electromagnet contacts both the Magnetinnenpol and the Magnetau hybridpol, preferably in this position, the valve opening is in an open position.
  • the anchor element comprises a steel tempered with chromium and molybdenum or consists of this. It can also be provided that the anchor element consists of 50CrMo4.
  • the injector housing is an injector outer housing.
  • the injector housing thus represents, at least in sections, the outer end of the injector.
  • the injector housing preferably the first injector housing section and / or the second injector housing section, has a duct for flowing or guiding fuel from one or more bores distributed around the circumference.
  • this conduit is thus in the injector itself.
  • This channel can preferably be introduced into the injector, for example by means of a bore or a similar method.
  • the invention comprises an internal combustion engine with an injector, which is designed according to one of the variants described above.
  • FIG. 2 shows a detail of Fig. 1 in an enlarged view for explaining the
  • Fig. 3 a cross section of an injector according to the invention.
  • FIG. 4 shows a section of FIG. 3 in an enlarged view for explaining the differences from the prior art.
  • Fig. 1 shows a partial sectional view of an injector of the prior art.
  • the injector 1 which has a housing 2, in which a plurality of injector components are arranged.
  • Essential for the function of the injector 1 are the Injektornadel 5, the valve 4, the anchor member 6 and the Elektromanget 3, which has a coil winding 31, an inner magnetic pole 32 and an outer magnetic pole 33.
  • a recess for arranging the spring 8 is provided in the inner magnetic pole 32, which presses the armature member 6 in the direction of the valve 4 to fluid-tightly close the drain throttle of the valve 4 in a de-energized state of the electromagnet.
  • FIG. 2 shows an enlarged representation in the lower region of the anchor element 6 in a closed state of the valve 4. It can be seen an outlet throttle 41, which represents an outlet for stored in a control chamber 44 under high pressure fuel. If the anchor element 6 is not located on the sealing seat 45 of the valve 4, the fuel taken up from the control chamber 44 under high pressure can flow out into a low-pressure region via a passage space 42.
  • the valve 4 can also be provided with a movable valve insert 43, by means of which the force acting on the Injektornadel 5 force can be degraded or built up very quickly.
  • Fig. 3 shows a cross section along the longitudinal direction of an injector according to the invention. It can be seen a conduit 7 for supplying fuel, which is arranged in a first housing portion 21 of the injector 1.
  • the injector housing 2 also constitutes a magnetic body of the electromagnet 3.
  • the injector housing 2 is divided into a first injector housing section 21 and a second injector housing section 22.
  • the first Injektorgepuruseabêt 21 also represents an outer housing of the injector 1.
  • the first Injektorgepuruseabêt 21 is simultaneously a Magnetinnenpol the electromagnet 3.
  • the second Injektorgepuruseabêt 22 represents a Magnetau touchpol the electromagnet 3. Separated is the Magnetinnenpol of the magnetic outer pole by a coil winding 30th
  • the first injector housing section 21 and the second injector housing section 22 are characterized in that they each have a channel for guiding fuel in their bodies.
  • FIG. 4 shows an enlarged portion of FIG. 3, showing the area around the electromagnet 3. It can be seen the coil winding 31 which is wound around an outer peripheral portion of the first Injektorgepuruseabitess 21 and thus simultaneously represents the Magnetinnenpol the electromagnet 3. Outside the coil winding 31 around a magnetic outer pole 33 is also provided, which also represents a second injector housing portion 22 at the same time.
  • the coil winding 31 is shown in an energized state, since the anchor member 6 is lifted from its closed position of the outlet throttle of the valve. In order to bring the anchor element 6 in such a position, it is necessary to overcome the force exerted by the spring 8 closing force, which is achieved by the electromagnet 3.
  • a magnetic flux or a magnetic circuit which extends from the magnetic inner pole 32 via the armature element 6 to the magnetic outer pole 33. Accordingly, a magnetic flux thus arises via the injector housing 2 and the anchor element 6 (also: plunger anchor).
  • the manufacturing costs for the solenoid valve can be reduced by approximately 85%. This is also advantageous also the lower number of components, which can be achieved due to the now no longer separately required magnetic components.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Fluid Mechanics (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

La présente invention concerne un injecteur (1) destiné à injecter du carburant, comprenant un corps d'injecteur (2) destiné à accueillir au moins un composant d'injecteur et un électroaimant (3) destiné à commander une vanne (4) pour l'ouverture et la fermeture de l'injecteur. L'électroaimant (3) possède un enroulement de bobine (31) et un corps d'aimant (32, 33) et le corps d'injecteur (2) est réalisé d'un seul tenant avec le corps d'aimant (32, 33).
EP18743521.9A 2017-07-20 2018-07-20 Injecteur pour l'injection de carburant Active EP3655641B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017116383.2A DE102017116383A1 (de) 2017-07-20 2017-07-20 Injektor zum Einspritzen von Krafstoff
PCT/EP2018/069837 WO2019016398A1 (fr) 2017-07-20 2018-07-20 Injecteur pour l'injection de carburant

Publications (2)

Publication Number Publication Date
EP3655641A1 true EP3655641A1 (fr) 2020-05-27
EP3655641B1 EP3655641B1 (fr) 2023-10-04

Family

ID=62981257

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18743521.9A Active EP3655641B1 (fr) 2017-07-20 2018-07-20 Injecteur pour l'injection de carburant

Country Status (5)

Country Link
US (1) US11319913B2 (fr)
EP (1) EP3655641B1 (fr)
CN (1) CN111094737B (fr)
DE (1) DE102017116383A1 (fr)
WO (1) WO2019016398A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017116383A1 (de) * 2017-07-20 2019-01-24 Liebherr-Components Deggendorf Gmbh Injektor zum Einspritzen von Krafstoff
DE102018101351A1 (de) 2018-01-22 2019-07-25 Liebherr-Components Deggendorf Gmbh Sitzplatte für einen Injektor und Verfahren zur Herstellung einer solchen Sitzplatte
DE102018113662A1 (de) 2018-06-08 2019-12-12 Liebherr-Components Deggendorf Gmbh Sitzplatte für einen Injektor
DE102019121538A1 (de) * 2019-08-09 2021-02-11 Liebherr-Components Deggendorf Gmbh Sitzplatte für einen Injektor und Verfahren zum Herstellen einer solchen Sitzplatte
DE102020108665A1 (de) 2020-03-30 2021-09-30 Liebherr-Components Deggendorf Gmbh Düsennadel für einen Kraftstoffinjektor und Injektorgehäuse für eine Düsennadel
DE102020108668A1 (de) 2020-03-30 2021-09-30 Liebherr-Components Deggendorf Gmbh Nadelhubschalter und Kraftstoffinjektor mit einem solchen Nadelhubschalter
DE102020108816A1 (de) 2020-03-31 2021-09-30 Liebherr-Components Deggendorf Gmbh Kraftstoffinjektor
DE102020113608A1 (de) 2020-03-31 2021-09-30 Liebherr-Components Deggendorf Gmbh Kraftstoffinjektorgehäuse und Injektor mit einem solchen Gehäuse
DE102020113609A1 (de) 2020-03-31 2021-09-30 Liebherr-Components Deggendorf Gmbh Kraftstoffinjektor
US11933257B2 (en) * 2022-03-18 2024-03-19 Caterpillar Inc. Fuel injector lift control
CN115288902B (zh) * 2022-09-01 2023-12-08 哈尔滨工程大学 低回油量双升程可变喷油规律电控喷油器

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Also Published As

Publication number Publication date
WO2019016398A1 (fr) 2019-01-24
CN111094737B (zh) 2022-09-20
DE102017116383A1 (de) 2019-01-24
EP3655641B1 (fr) 2023-10-04
US11319913B2 (en) 2022-05-03
US20200318596A1 (en) 2020-10-08
CN111094737A (zh) 2020-05-01

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