EP1717436A1 - Elektrischer Verbinder für Brennstoffinjektor - Google Patents

Elektrischer Verbinder für Brennstoffinjektor Download PDF

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Publication number
EP1717436A1
EP1717436A1 EP05009254A EP05009254A EP1717436A1 EP 1717436 A1 EP1717436 A1 EP 1717436A1 EP 05009254 A EP05009254 A EP 05009254A EP 05009254 A EP05009254 A EP 05009254A EP 1717436 A1 EP1717436 A1 EP 1717436A1
Authority
EP
European Patent Office
Prior art keywords
connector
absorber
injector
junction area
socket
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
EP05009254A
Other languages
English (en)
French (fr)
Other versions
EP1717436B1 (de
EP1717436B8 (de
Inventor
Paolo Bertini
Alessandro Morelli
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.)
Continental Automotive GmbH
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Priority to EP20050009254 priority Critical patent/EP1717436B8/de
Priority to DE200560004601 priority patent/DE602005004601T2/de
Publication of EP1717436A1 publication Critical patent/EP1717436A1/de
Publication of EP1717436B1 publication Critical patent/EP1717436B1/de
Application granted granted Critical
Publication of EP1717436B8 publication Critical patent/EP1717436B8/de
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus

Definitions

  • the invention relates to a connector for an injector comprising a socket, a flange and a junction area, the junction area coupling the flange with the socket.
  • fluid injectors In order to meet the requirements of strict emission legislation and in order to save fuel consumption, fluid injectors, in particular fluid injectors for internal combustion engines, are arranged in a cylinder head of an internal combustion engine in a way that they inject the fuel directly into a combustion chamber of the engine. In order to get a very fine atomization of the fluid in such applications, it is necessary to provide the fluid under high pressure. In gasoline internal combustion engines, the fluid pressure may reach up to 200 bars; in Diesel engines, the fluid pressure may reach up to 2000 bars. The duration while there is an injection can be very short. The duration may go down to a few milliseconds or lower. So the pressure conditions in the injector during the operation of the injector are changing very fast. The fast change from high to low pressure in the fluid in the injector can cause shock waves in the fluid which leads to shock waves in the whole injector material.
  • the object of the invention is to create a connector for an injector, which enables simply low-noise operation of the connector-injector-unit.
  • the invention is distinguished by a connector for an injector comprising a socket, a flange and a junction area.
  • the junction area couples the flange with the socket.
  • the socket comprises one or more electric conductors and an absorber.
  • the mass of the absorber exceeds the mass of the one or respectively more electric conductors.
  • the density of the absorber exceeds the density of the main material of the connector.
  • the main material of the connector is considered as the material of the connector making up the biggest percentage of the mass of the connector.
  • the injector comprises arrangements for contacting the injector, for example for electric connections.
  • Shock waves in the injector caused by fast and heavily changing pressure conditions in the injector, cause shock waves in the connector. Simulations show that the amplitude of the shock waves can be very high in that area where the connector is connected to the injector.
  • the shock waves in the injector and the connector cause to acoustic waves in the surrounding air which leads to noise during the operation of the injector.
  • An absorber with a properly given mass and density contributes simply to an absorption of the shock waves in the connector-injector-unit. This avoids acoustic waves in the air and contributes to a noise reduction while operating the injector.
  • the absorber comprises a first absorber body which is surrounded by the connector material in the junction area. So the first absorber body simply is well-protected from corrosion by the material of the connector.
  • the absorber comprises a second absorber body, which is arranged in a recess of the connector in the junction area. This enables noise reduction of the injector with insignificant modification of the connector.
  • the absorber comprises a third absorber body, which is arranged in a groove of the connector in the junction area. This enables noise reduction of the injector with insignificant weakening of the connector in the junction area.
  • the absorber comprises a fourth absorber body having a form enabling a positive connection of the fourth absorber body to the connector in the junction area. This enables noise reduction of the connector-injector-unit without any modification of the connector.
  • the absorber comprises carbide. This enables a good noise absorption and a cheap production of the absorber.
  • the absorber comprises lead. This enables a very good noise absorption.
  • the absorber comprises steel. This enables a very good noise absorption.
  • the total absorber mass has about 5% to 15% of the total injector mass. This enables a very good noise reduction while having a low mass.
  • a connector 2 for an injector 4 comprises a flange 6, a socket 8, and a junction area 10 (figure 1).
  • the flange 6 has an injector-recess, in which the injector 4 is arranged.
  • the socket 8 comprises a socket-recess for a jack.
  • the junction area 10 connects the socket 8 to the flange 6.
  • the junction area 10 comprises at least one electric conductor 11 (figure 2).
  • the electric conductor 11 may be a wire, for example a copper wire.
  • the electric conductor 11 also could be a pin made of an electric conducting material.
  • An internal combustion engine comprises a cylinder head, in which the connector 2 and the injector 4 may be arranged, and a control unit.
  • the control unit operates the injector 4 by sending signals through the electric conductor 11 to the injector 4. Via the injector 4, the control unit is able to control the amount of fuel which is injected to a combustion chamber of the internal combustion engine.
  • the injector 4 that is suitable for injecting fuel into a gasoline engine or that also may be suitable for injecting fuel into a diesel engine, may comprise a housing, a valve body, at least one nozzle and a connection area for a fuel supply.
  • the connector 2, especially the flange 6, the socket 8 and the junction area 10, may be formed in a different way.
  • the flange 6 may cover in axial direction of the injector 4 only a small part of the injector 2.
  • the flange 6 may be not circulating the injector 4. This means that the flange 6 contacts the injector 4 only in a part of the scope of the injector 4.
  • the junction area 10 could be arranged in any part of the flange 6, while its functionality is still given.
  • the design of the socket 8 is dependent on the jack which is meant to be put in the socket 8.
  • the junction area 10 comprises an absorber-recess 12 (Figure 1).
  • the absorber-recess 12 could be formed while forming the whole connector 2 or may be formed after forming the connector 2 by drilling the absorber-recess 12 in the connector 2 in the junction area 10.
  • the absorber may be made of carbide and can have a mass of about 8% of the whole connector-injector-unit 2, 4 mass.
  • junction area 10 is that part of the connector-injector-unit 4, 2 which comprises the biggest vibration amplitude while operating the injector.
  • the vibrations are caused by shock waves which are caused by fast and heavily changing pressure conditions in the injector 4. This leads to acoustic waves in the surrounding air of the connector-injector-unit 2, 4 and so creates noise.
  • the first absorber body 14 contributes to the absorption of the shock waves in the junction area 10, which enables low noise operation of the connector-injector-unit 2, 4.
  • the absorber may be built in an alternative way.
  • There may be a second absorber body 16 which is built in the junction area 10 in a way that the material of the junction area totally surrounds the second absorber body 16 (figure 2).
  • This embodiment comprises a cheap possibility to produce the connector 2 absorber unit.
  • the second absorber body 16 is protected by the material of the connector 2 in the junction area 10. This protects the second absorber body 16 from corrosion. Further, it enables to put the second absorber body 16 in any part of the connector 2 in the junction area 10.
  • the second absorber body 16 may be an alternative to the first absorber body 14 or may be additional to the first absorber body 14.
  • the junction area 10 comprises a groove 20 in which a third absorber body 18 is arranged (figure 3).
  • the absorber may comprise a fourth absorber body 24 which is formed in a way which enables a positive connection between the fourth absorber body 24 and the connector 2 in the junction area 10 (figure 4).
  • the fourth absorber body 24 may be formed like two brackets which are connected on one side. So the connector 2 does not need to be modified (figure 5).
  • the absorber especially the absorber bodies one to four 14, 16, 18, 24 alternatively may be made of lead or stainless steel or any further material which enables the absorption of acoustic waves in the material of the connector 2.
  • Stainless steel is especially advantageous, if it needs to be robust against corrosion.
  • the absorber has a mass of 5% to 15% of the total connector-injector-unit 2, 4 mass.
  • the injector 4 having a mass of 24 g requires an absorber with about 2 g.
  • the absorber may have another mass which enables the absorption of the shock waves.
  • the third absorber body 18 and the fourth absorber body 24 may be arranged together. Further, any combination of the single absorber bodies one to four 14, 16, 18, 24 is possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20050009254 2005-04-27 2005-04-27 Elektrischer Verbinder für Brennstoffinjektor Expired - Fee Related EP1717436B8 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20050009254 EP1717436B8 (de) 2005-04-27 2005-04-27 Elektrischer Verbinder für Brennstoffinjektor
DE200560004601 DE602005004601T2 (de) 2005-04-27 2005-04-27 Elektrischer Verbinder für Brennstoffinjektor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20050009254 EP1717436B8 (de) 2005-04-27 2005-04-27 Elektrischer Verbinder für Brennstoffinjektor

Publications (3)

Publication Number Publication Date
EP1717436A1 true EP1717436A1 (de) 2006-11-02
EP1717436B1 EP1717436B1 (de) 2008-01-30
EP1717436B8 EP1717436B8 (de) 2008-05-21

Family

ID=34935842

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20050009254 Expired - Fee Related EP1717436B8 (de) 2005-04-27 2005-04-27 Elektrischer Verbinder für Brennstoffinjektor

Country Status (2)

Country Link
EP (1) EP1717436B8 (de)
DE (1) DE602005004601T2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012136415A1 (de) * 2011-04-06 2012-10-11 Robert Bosch Gmbh Ventil zum zumessen eines mediums
WO2012152488A1 (de) * 2011-05-06 2012-11-15 Robert Bosch Gmbh Ventil zum zumessen eines strömenden mediums

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6338682A (ja) * 1986-07-31 1988-02-19 Nippon Denso Co Ltd 電磁式燃料噴射弁
JPS6361770A (ja) * 1986-09-02 1988-03-17 Nippon Denso Co Ltd 電磁式燃料噴射弁
JPH01155071A (ja) * 1987-12-11 1989-06-16 Nippon Denso Co Ltd 燃料噴射装置
DE10317393A1 (de) * 2002-04-22 2004-02-05 Usui Kokusai Sangyo K.K. Ltd. Kraftstoffförderleistenanordnung
DE102004013169A1 (de) * 2003-03-25 2004-10-21 Hitachi Unisia Automotive, Ltd., Atsugi Kraftstoffeinspritzventil

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6338682A (ja) * 1986-07-31 1988-02-19 Nippon Denso Co Ltd 電磁式燃料噴射弁
JPS6361770A (ja) * 1986-09-02 1988-03-17 Nippon Denso Co Ltd 電磁式燃料噴射弁
JPH01155071A (ja) * 1987-12-11 1989-06-16 Nippon Denso Co Ltd 燃料噴射装置
DE10317393A1 (de) * 2002-04-22 2004-02-05 Usui Kokusai Sangyo K.K. Ltd. Kraftstoffförderleistenanordnung
DE102004013169A1 (de) * 2003-03-25 2004-10-21 Hitachi Unisia Automotive, Ltd., Atsugi Kraftstoffeinspritzventil

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 257 (M - 719) 20 July 1988 (1988-07-20) *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 286 (M - 727) 5 August 1988 (1988-08-05) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 418 (M - 871) 18 September 1989 (1989-09-18) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012136415A1 (de) * 2011-04-06 2012-10-11 Robert Bosch Gmbh Ventil zum zumessen eines mediums
CN103459823A (zh) * 2011-04-06 2013-12-18 罗伯特·博世有限公司 用于计量介质的阀
JP2014510234A (ja) * 2011-04-06 2014-04-24 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング 媒体を調量するための弁
CN103459823B (zh) * 2011-04-06 2017-09-01 罗伯特·博世有限公司 用于计量介质的阀
WO2012152488A1 (de) * 2011-05-06 2012-11-15 Robert Bosch Gmbh Ventil zum zumessen eines strömenden mediums
CN103518055A (zh) * 2011-05-06 2014-01-15 罗伯特·博世有限公司 用于对流动介质计量的阀

Also Published As

Publication number Publication date
DE602005004601D1 (de) 2008-03-20
DE602005004601T2 (de) 2009-02-05
EP1717436B1 (de) 2008-01-30
EP1717436B8 (de) 2008-05-21

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