DE102004060462A1 - Fuel injection device for internal combustion engine has damping elements of metal foam accommodated at respective connecting points between injector and cylinder head and between fuel rail and injector - Google Patents
Fuel injection device for internal combustion engine has damping elements of metal foam accommodated at respective connecting points between injector and cylinder head and between fuel rail and injector Download PDFInfo
- Publication number
- DE102004060462A1 DE102004060462A1 DE200410060462 DE102004060462A DE102004060462A1 DE 102004060462 A1 DE102004060462 A1 DE 102004060462A1 DE 200410060462 DE200410060462 DE 200410060462 DE 102004060462 A DE102004060462 A DE 102004060462A DE 102004060462 A1 DE102004060462 A1 DE 102004060462A1
- Authority
- DE
- Germany
- Prior art keywords
- injector
- cylinder head
- metal foam
- injection device
- damping element
- 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.)
- Withdrawn
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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
-
- 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
- F02M2200/09—Fuel-injection apparatus having means for reducing noise
Abstract
Description
Die Erfindung betrifft eine Einspritzvorrichtung für eine Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1.The The invention relates to an injection device for an internal combustion engine according to the preamble of claim 1.
Zur Kraftstoffversorgung von Brennkraftmaschinen werden Speichereinspritzsysteme eingesetzt, bei denen mit hohen Einspritzdrücken und schnellen Schaltgeschwindigkeiten gearbeitet wird. Die Speichereinspritzsysteme weisen eine Hochdruckpumpe auf, die den Kraftstoff unter hohem Druck in einen Hochdruckspeicher fördert und vorhält. Aus dem Hochdruckspeicher gelangt der Kraftstoff mittels Injektoren direkt in die Brennräume der Brennkraftmaschine. Die Injektoren werden mit Haltemitteln jeweils an mindestens einer Anschlussstelle gegen den Zylinderkopf gedrückt. Die Injektoren werden von piezoelektrischen oder elektromagnetischen Aktoren betätigt. Durch die Betätigung der Injektoren entstehen Schwingungen, die über die Anschlussstelle in den Zylinderkopf geleitet werden. Diese mechanischen Schwingungen führen zu erheblichen Störgeräuschen, die den Fahrkomfort negativ beeinflussen.to Fuel supply of internal combustion engines are storage injection systems used in those with high injection pressures and fast switching speeds is working. The storage injection systems have a high-pressure pump put the fuel under high pressure in a high-pressure accumulator promotes and holds. From the high-pressure accumulator, the fuel passes through injectors directly into the combustion chambers the internal combustion engine. The injectors are equipped with holding means respectively pressed against the cylinder head at least one connection point. The Injectors are powered by piezoelectric or electromagnetic actuators actuated. By the operation The injectors create vibrations that are transmitted via the connection point in to be directed to the cylinder head. These mechanical vibrations to lead to considerable noise, which negatively affect the ride comfort.
Aus
der gattungsbildenden
Aufgabe der Erfindung ist es demgegenüber, eine Einspritzvorrichtung für eine Brennkraftmaschine zur Verfügung zustellen, deren Schwingungsverhalten auf einfache Art so einstellbar ist, dass keine bzw. nur geringe Geräuschemissionen entstehen.task the invention it is in contrast, a Injection device for an internal combustion engine available deliver their vibration behavior in a simple way so adjustable is that no or only low noise emissions arise.
Diese Aufgabe wird durch eine Einspritzvorrichtung für eine Brennkraftmaschine mit den Merkmalen des Anspruchs 1 gelöst.These Task is by an injection device for an internal combustion engine with the features of claim 1 solved.
Die erfindungsgemäße Einspritzvorrichtung für eine Brennkraftmaschine ist gekennzeichnet durch ein Dämpfungselement, das aus Metallschaum besteht. Die Einspritzvorrichtung weist mindestens einen Injektor in einem Zylinderkopf der Brennkraftmaschine auf. Der mindestens eine Injektor spritzt den Kraftstoff direkt in einen Brennraum der Brennkraftmaschine ein. Ein Haltemittel drückt den Injektor an einer Anschlussstelle gegen den Zylinderkopf. An der Anschlussstelle, zwischen dem Injektor und dem Zylinderkopf, ist ein Dämpfungselement aus Metallschaum untergebracht. Infolge der hochporösen Struktur besitzen Metallschäume sehr gute mechanische und akustische Dämmeigenschaften. Vorteilhafterweise ist die Dämpfungskonstante des Dämpfungselementes aus Metallschaum durch Variation der Porengröße und der verwendeten Werkstoffe einfach beeinflussbar.The Inventive injection device for an internal combustion engine is characterized by a damping element, which consists of metal foam. The injection device has at least one Injector in a cylinder head of the internal combustion engine. The at least an injector injects the fuel directly into a combustion chamber of the Internal combustion engine. A holding means presses the injector at a connection point against the cylinder head. At the junction, between the injector and the cylinder head, is a damping element housed in metal foam. Due to the highly porous structure own metal foams very good mechanical and acoustic insulation properties. advantageously, is the damping constant of the damping element made of metal foam by varying the pore size and the materials used easily influenced.
In Ausgestaltung der Erfindung ist an einer zweiten Anschlussstelle, zwischen dem Haltemittel und dem Injektor, ein weiteres, zweites Dämpfungselement aus Metallschaum untergebracht. Vorteilhafterweise wird eine Übertragung von Schwingungen über das Haltemittel in den Zylinderkopf verhindert.In Embodiment of the invention is at a second connection point, between the holding means and the injector, another, second damping element housed in metal foam. Advantageously, a transmission from vibrations over prevents the holding means in the cylinder head.
In weiterer Ausgestaltung der Erfindung ist das Dämpfungselement von einer geschlossenen Hülle umgeben. Vorteilhafterweise führt ein Dämpfungselement aus Metallschaum, das vollständig von einer Hülle umgeben ist, zu einer Steigerung der Festigkeit des Dämpfungselements.In Another embodiment of the invention, the damping element is surrounded by a closed shell. Advantageously leads a damping element made of metal foam that completely from a shell is surrounded, to increase the strength of the damping element.
In weiterer Ausgestaltung der Erfindung ist der Metallschaum geschlossenporig ausgeführt. Vorteilhafterweise ist metallischer Schaum mit geschlossenen Poren gasdicht.In Further embodiment of the invention, the metal foam is closed-pore executed. Advantageously, metallic foam with closed pores gas-tight.
In weiterer Ausgestaltung der Erfindung ist der Metallschaum offenporig ausgeführt. Vorteilhafterweise sind Dämpfungselemente aus offenporigem Metallschaum, die von einer geschlossenen Hülle umgeben sind, gasdicht.In Another embodiment of the invention, the metal foam is open-pored executed. Advantageously, damping elements made of open-pored metal foam surrounded by a closed shell are, gas-tight.
In weiterer Ausgestaltung der Erfindung ist das Haltemittel des Injektors an den Zylinderkopf ein Hochdruckspeicher der Einspritzvorrichtung. Die Einspritzvorrichtung ist in Form eines Speichereinspritzsystems ausgeführt. Der Hochdruckspeicher des Speichereinspritzsystems ist an dem Zylinderkopf befestigt. Vorteilhafterweise spannt der Hochdruckspeicher die Injektoren zwischen die erste Anschlussstelle und die zweite Anschlussstelle ein und versorgt die Injektoren mit Kraftstoff.In Another embodiment of the invention is the retaining means of the injector to the cylinder head, a high-pressure accumulator of the injector. The injection device is in the form of a storage injection system executed. The high pressure accumulator of the accumulator injection system is attached to the cylinder head. Advantageously, the high pressure accumulator biases the injectors the first connection point and the second connection point and supplies the injectors with fuel.
Weitere Merkmale und Merkmalskombinationen ergeben sich aus der Beschreibung sowie den Zeichnungen. Ein konkretes Ausführungsbeispiel der Erfindung ist in den Zeichnungen vereinfacht dargestellt und in der nachfolgenden Beschreibung näher erläutert.Further Features and combinations of features result from the description as well as the drawings. A concrete embodiment of the invention is shown in simplified form in the drawings and in the following Description explained in more detail.
Dabei zeigen:there demonstrate:
Die
Der
Injektor
Der
Injektor
Somit
ergibt sich ein Halte- bzw. Spannverbund für den Injektor
Der
Injektor
Die
Das
erste Dämpfungselement
Das
zweite Dämpfungselement
Die
Dämpfungskonstanten
der Dämpfungselemente
In
In
Die
Dämpfungselemente
Denkbar sind auch Einspritzvorrichtungen, deren Injektoren mit Spannpratzen oder anderen Haltemitteln gegen den Zylinderkopf gedruckt werden. Dabei können an den Anschlussstellen Dämpfungselemente aus Metallschaum vorgesehen sein.Conceivable are also injectors whose injectors with clamps or other holding means against the cylinder head to be printed. It can At the connection points damping elements be provided of metal foam.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410060462 DE102004060462A1 (en) | 2004-12-16 | 2004-12-16 | Fuel injection device for internal combustion engine has damping elements of metal foam accommodated at respective connecting points between injector and cylinder head and between fuel rail and injector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200410060462 DE102004060462A1 (en) | 2004-12-16 | 2004-12-16 | Fuel injection device for internal combustion engine has damping elements of metal foam accommodated at respective connecting points between injector and cylinder head and between fuel rail and injector |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102004060462A1 true DE102004060462A1 (en) | 2006-03-23 |
Family
ID=36001716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE200410060462 Withdrawn DE102004060462A1 (en) | 2004-12-16 | 2004-12-16 | Fuel injection device for internal combustion engine has damping elements of metal foam accommodated at respective connecting points between injector and cylinder head and between fuel rail and injector |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE102004060462A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006009094A1 (en) * | 2006-02-28 | 2007-08-30 | Bayerische Motoren Werke Ag | Damper for use between cylinder head and injector in region of injector foot, has sub-functional section e.g. inner ring and outer ring, for fixing injector with respect to cylinder head, where damper is formed as multipart structure |
DE102007002682A1 (en) * | 2007-01-18 | 2008-07-24 | Bayerische Motoren Werke Aktiengesellschaft | Damping device for damping arrangement of injector of motor vehicle to carrier body, has damping unit for damping, and rings for position-accurate fixing of injector with respect to carrying body, where device includes multipart structure |
EP2166219A1 (en) * | 2008-09-20 | 2010-03-24 | Stop-Choc Schwingungstechnik GmbH & Co KG | Decoupling element |
CN106640452A (en) * | 2016-12-21 | 2017-05-10 | 安徽瑞沃电子科技有限公司 | Special oil injection device for highpressure common rail |
-
2004
- 2004-12-16 DE DE200410060462 patent/DE102004060462A1/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006009094A1 (en) * | 2006-02-28 | 2007-08-30 | Bayerische Motoren Werke Ag | Damper for use between cylinder head and injector in region of injector foot, has sub-functional section e.g. inner ring and outer ring, for fixing injector with respect to cylinder head, where damper is formed as multipart structure |
US7600502B2 (en) | 2006-02-28 | 2009-10-13 | Bayerische Motoren Werke Aktiengesellschaft | Damping device and damping element |
DE102007002682A1 (en) * | 2007-01-18 | 2008-07-24 | Bayerische Motoren Werke Aktiengesellschaft | Damping device for damping arrangement of injector of motor vehicle to carrier body, has damping unit for damping, and rings for position-accurate fixing of injector with respect to carrying body, where device includes multipart structure |
EP2166219A1 (en) * | 2008-09-20 | 2010-03-24 | Stop-Choc Schwingungstechnik GmbH & Co KG | Decoupling element |
CN106640452A (en) * | 2016-12-21 | 2017-05-10 | 安徽瑞沃电子科技有限公司 | Special oil injection device for highpressure common rail |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OAV | Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1 | ||
8127 | New person/name/address of the applicant |
Owner name: DAIMLERCHRYSLER AG, 70327 STUTTGART, DE |
|
8139 | Disposal/non-payment of the annual fee |