EP0915253A2 - Dispositif d'injection de combustible à haute pression pour moteurs à combustion interne, notamment pour moteurs Otto - Google Patents

Dispositif d'injection de combustible à haute pression pour moteurs à combustion interne, notamment pour moteurs Otto Download PDF

Info

Publication number: EP0915253A2
Authority: EP; European Patent Office
Prior art keywords: connecting piece; injection nozzle; injection device; injection; pressure accumulator
Prior art date: 1997-11-04
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

EP98117925A

Other languages

German (de)

English (en)

Other versions

EP0915253A3 (fr

EP0915253B1 (fr

Inventor

Hermann Meindl

Franz Kreil

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.)

Bayerische Motoren Werke AG

Original Assignee

Bayerische Motoren Werke 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.)

1997-11-04

Filing date

1998-09-22

Publication date

1999-05-12

1998-09-22 Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG

1999-05-12 Publication of EP0915253A2 publication Critical patent/EP0915253A2/fr

2003-01-02 Publication of EP0915253A3 publication Critical patent/EP0915253A3/fr

2003-11-26 Application granted granted Critical

2003-11-26 Publication of EP0915253B1 publication Critical patent/EP0915253B1/fr

2018-09-22 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

Links

238000002347 injection Methods 0.000 title claims abstract description 68
239000007924 injection Substances 0.000 title claims abstract description 68
239000000446 fuel Substances 0.000 title claims abstract description 22
238000002485 combustion reaction Methods 0.000 title claims description 11
238000007789 sealing Methods 0.000 claims abstract description 10
210000002105 tongue Anatomy 0.000 claims description 9
230000001681 protective effect Effects 0.000 claims description 3
238000011144 upstream manufacturing Methods 0.000 claims description 3
238000004519 manufacturing process Methods 0.000 description 4
238000010276 construction Methods 0.000 description 3
230000036316 preload Effects 0.000 description 2
238000009434 installation Methods 0.000 description 1
239000007921 spray Substances 0.000 description 1

Images

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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails

Definitions

the invention relates to a preamble of claim 1 High-pressure fuel injection device for an internal combustion engine, in particular Otto engine, with an injection nozzle directed directly into a combustion chamber, which can be arranged with a connecting piece on the machine housing High-pressure fuel reservoir by means of a plug connection with a tolerance compensating elastic sealing element is connectable.
the invention is based, for a generic high-pressure fuel injection device the task to show training that takes into account the acting combustion chamber pressure in connection with the need for compensation of component tolerances in construction and assembly is simple.
an assembly unit has at least two connecting pieces for injection nozzles comprises, each via a cylindrical plug-in extension with radial play are arranged in a fuel supply line in the respective connecting piece Interposition of an O-ring as an elastic sealing element and that everyone Plug-in extension also has a groove arrangement on the injection nozzle side for receiving a disc spring as a force-transmitting spring element between each Connection piece and respective injection nozzle.
each connecting piece on the injection nozzle side one of the plug-in extension the injection nozzle receiving supply line axially upstream recess has for the arrangement of arranged on the plate spring retaining tabs, which outward locking tongues in openings in which the recess intervene positively in the limiting jacket of each connection piece.
the plate spring retaining tabs Preferably are disc spring and retaining tabs with locking tongues in one piece educated.
a first, relatively thick-walled, preferably slotted Belleville spring is provided as an essentially force-transmitting spring element and that a second, relatively thin-walled, also slotted disc spring in one piece is formed with retaining tabs, both disc springs arranged in the same direction are to increase the spring force.
the retaining tabs each have a step-shaped section with the edge area the disc spring are connected, and those in the gap recesses of the jacket each connecting piece engaging arranged sections as rotary stops serve the or each disc spring.
the sections of the retaining tabs which act as rotary stops preferably serve in combination with a slot of the disc spring which is adapted to the groove arrangement enforcing protective device for a control cable or a molded Plug connection of the injection nozzle at the same time securing the position of the injection nozzle relative to the connector. This is advantageous for installation or attachment an assembly unit according to the invention the selected Spray jet position of the injection nozzles ensured.
the injectors in groups of adjacent cylinders form an assembly unit connected to a single high-pressure accumulator, wherein the subunits to each other via a compensating connection Compensation for other building, manufacturing and assembly tolerances are connected and the compensating connection is preferably designed as a corrugated pipe.
the high-pressure accumulator 7 With injection nozzles detachably held at its connecting piece 5 4 an assembly unit 9, the high-pressure accumulator 7 with the connecting pieces 5 detachable in the mounting direction of the injection nozzles 4 on the machine housing 6 is fixed and which each have a circumferential shoulder 11 against a paragraph 12 a receptacle 13 in the machine housing 6 arranged injectors stop 4 via the fixed high-pressure accumulator 7 by a between the injection nozzles 4 and the connecting piece 5 each arranged to transmit power Spring element 14 are arranged biased.
the assembly unit 9 comprises two subunits 9, 9 ′′. with at least two connecting pieces 5 for injection nozzles 4, each of which a cylindrical plug-in extension 15 with radial play in a fuel feed line 16 are arranged in the respective connecting piece 5 with the interposition of a O-ring as an elastic sealing element 8, each plug-in extension 15 also on the injection nozzle side has a groove arrangement 17 for receiving a plate spring 14 as a force-transmitting spring element between the respective connecting piece 5 and respective injector 4.
each connection piece 5 has one of the injection nozzle side Plug-in extension 15 of the feed line receiving the injection nozzle 16 axially upstream Recess 18 on the arrangement of a plate spring developed with retaining tabs 19 14.
the holding tabs 19 have locking tongues arranged outwards 20, which in openings 21 in which delimit the recess 18 Sheath 22 of each connection piece 5 engage positively. How from Figures 2, 3 and 5 can be seen, the retaining tabs 19 with the locking tongues 20 arranged in one piece on the plate springs 14.
each injector 4 on the high pressure accumulator 7 or on the assembly unit 9 reaches a double positive connection, namely a first positive connection the plate spring 14 with the groove arrangement 17 of the injection nozzle 14 on the one hand and in openings 21 in the jacket 22 of the connecting piece 5 latching locking tongues 20 of the retaining tabs 19 with the biasing force transmitting disc spring 14 are in one piece.
the retaining tabs 19 can also on the outer circumference of the jacket 22 with locking tongues engaging in the openings 21 20 may be provided.
a first, relatively thick-walled, corresponding to the groove arrangement 17 slotted disc spring 14 as an essentially force-transmitting spring element is provided and that a second, relatively thin-walled, slotted Belleville washer is integrally formed with retaining tabs, with both Belleville washers 14 arranged in the same direction to increase the spring force for increased preload are.
a rotation of the plate springs 14 under tension is countered by the fact that the retaining tabs 19 each have a step-shaped section 23 with the edge area the plate spring 14 are connected and in the gap recesses 24th of the jacket 22 of each connecting piece 5 engagingly arranged sections 23 serve as turning stops.
the injection nozzles 4 form for a multi-cylinder Otto engine 2 of cylinders in series with a single high-pressure accumulator 7 each connected to the assembly unit 9, the subunits 9, 9 ′′ with each other via a compensating connection 27 to compensate for all possible Tolerances are connected.
the compensating connection 27 is preferably as one Corrugated tube 28 designed.
the invention provides an embodiment of a high-pressure fuel injection device 1 for a direct petrol injection found as a tightly tested unit 9 from injection nozzles 4 and high pressure accumulator 7 (common rail) completely on the Internal combustion engine 2 can be assembled at low assembly costs, with the designed from plate spring 14 and retaining tabs 19 with locking tongues 20 Holding and connecting element in combination with the O-ring 8 as an elastic Sealing element of the plug connection of the injection nozzles 4 on the high-pressure accumulator 7 a compensation of all component, manufacturing and assembly tolerances is achieved and at the same time a positional orientation of the injection nozzles 4 is ensured. Since also at disassembly of the assembly unit 9, the injection nozzles 4 on the high-pressure accumulator 7 leakage or loss of fuel is avoided.

Landscapes

Engineering & Computer Science (AREA)
Chemical & Material Sciences (AREA)
Combustion & Propulsion (AREA)
Mechanical Engineering (AREA)
General Engineering & Computer Science (AREA)
Fuel-Injection Apparatus (AREA)

EP98117925A 1997-11-04 1998-09-22 Dispositif d'injection de combustible à haute pression pour moteurs à combustion interne, notamment pour moteurs Otto Expired - Lifetime EP0915253B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE19748593A DE19748593A1 (de)	1997-11-04	1997-11-04	Hochdruck-Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine, insbesondere Otto-Motor
DE19748593		1997-11-04

Publications (3)

Publication Number	Publication Date
EP0915253A2 true EP0915253A2 (fr)	1999-05-12
EP0915253A3 EP0915253A3 (fr)	2003-01-02
EP0915253B1 EP0915253B1 (fr)	2003-11-26

Family

ID=7847516

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP98117925A Expired - Lifetime EP0915253B1 (fr)	1997-11-04	1998-09-22	Dispositif d'injection de combustible à haute pression pour moteurs à combustion interne, notamment pour moteurs Otto

Country Status (3)

Country	Link
EP (1)	EP0915253B1 (fr)
DE (2)	DE19748593A1 (fr)
ES (1)	ES2210638T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2003006818A1 (fr) *	2001-07-09	2003-01-23	Robert Bosch Gmbh	Dispositif de fixation d'une soupape d'injection de carburant a une conduite de distribution de carburant
EP1094217A3 (fr) *	1999-10-22	2003-10-22	Ford Global Technologies, Inc.	Système d'injection de combustible
EP1388665A3 (fr) *	2002-08-09	2006-03-08	DaimlerChrysler AG	Dispositif d'injection de combustible
EP1482169A3 (fr) *	2003-05-29	2006-06-07	Delphi Technologies, Inc.	Bride de fixation d'injecteurs et ensemble
WO2006037726A3 (fr) *	2004-10-01	2006-06-22	Bosch Gmbh Robert	Systeme d'assujettissement pour dispositif d'injection de carburant, et dispositif d'injection de carburant
US10167831B2 (en)	2017-01-13	2019-01-01	Caterpillar Inc.	Accumulator centering mechanism

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US5970953A (en) *	1999-01-12	1999-10-26	Siemens Automotive Corporation	High pressure injector clip
DE10012759A1 (de) *	2000-03-16	2001-09-20	Volkswagen Ag	Brennkraftmaschine mit Einspritzventilen
DE10108467A1 (de) *	2001-02-22	2002-09-05	Bosch Gmbh Robert	Befestigungsvorrichtung
DE10256668A1 (de)	2002-12-04	2004-07-29	Robert Bosch Gmbh	Stützelement
DE102004055317A1 (de)	2004-11-16	2006-05-24	Bosch Rexroth Aktiengesellschaft	Elektrische Drehfeldmaschine und Primärteil
DE102012016254A1 (de)	2012-08-16	2013-03-21	Daimler Ag	Rail-Baugruppe

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3843214C2 (fr)	1988-12-22	1992-04-30	Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De

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Publication number	Priority date	Publication date	Assignee	Title
CA951201A (en) *	1971-09-20	1974-07-16	Bendix Corporation (The)	Fuel injector manifold and mounting arrangement
DE2908095C2 (de) *	1979-03-02	1984-02-16	Robert Bosch Gmbh, 7000 Stuttgart	Kraftstoffeinspritzanlage für Brennkraftmaschinen
DE7918697U1 (de) *	1979-06-29	1980-08-28	Bayerische Motoren Werke Ag, 8000 Muenchen	Verbindung von zwei koaxial hintereinander angeordneten Rohrabschnitten o.dgl
CS220808B1 (en) *	1980-09-19	1983-04-29	Jaromir Indra	Head of combustion engine with injector
DE8134504U1 (de) *	1981-11-26	1983-10-06	Bayerische Motoren Werke Ag, 8000 Muenchen	Kraftstoff-einspritzanlage fuer brennkraftmaschinen
DE4413914A1 (de) *	1994-04-21	1995-10-26	Bosch Gmbh Robert	Brennstoffeinspritzeinrichtung
JPH08121285A (ja) *	1994-10-27	1996-05-14	Hitachi Ltd	燃料供給装置及び燃料供給システム
US5697345A (en) *	1994-12-28	1997-12-16	Cummins Engine Company, Inc.	Clamping load distributor for a fuel injector
DE19536441A1 (de) *	1995-09-29	1997-04-03	Saab Automobile	Federklammer zur Verbindung einer Einspritzdüse mit einer Einspritzleitung
US5762040A (en) *	1997-02-04	1998-06-09	Brunswick Corporation	Cylinder wall fuel injection system for loop-scavenged, two-cycle internal combustion engine

1997
- 1997-11-04 DE DE19748593A patent/DE19748593A1/de not_active Withdrawn
1998
- 1998-09-22 DE DE59810257T patent/DE59810257D1/de not_active Expired - Lifetime
- 1998-09-22 EP EP98117925A patent/EP0915253B1/fr not_active Expired - Lifetime
- 1998-09-22 ES ES98117925T patent/ES2210638T3/es not_active Expired - Lifetime

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3843214C2 (fr)	1988-12-22	1992-04-30	Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart, De

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
EP1094217A3 (fr) *	1999-10-22	2003-10-22	Ford Global Technologies, Inc.	Système d'injection de combustible
WO2003006818A1 (fr) *	2001-07-09	2003-01-23	Robert Bosch Gmbh	Dispositif de fixation d'une soupape d'injection de carburant a une conduite de distribution de carburant
EP1388665A3 (fr) *	2002-08-09	2006-03-08	DaimlerChrysler AG	Dispositif d'injection de combustible
EP1482169A3 (fr) *	2003-05-29	2006-06-07	Delphi Technologies, Inc.	Bride de fixation d'injecteurs et ensemble
WO2006037726A3 (fr) *	2004-10-01	2006-06-22	Bosch Gmbh Robert	Systeme d'assujettissement pour dispositif d'injection de carburant, et dispositif d'injection de carburant
EP1906005A1 (fr) *	2004-10-01	2008-04-02	Robert Bosch Gmbh	Dispositif d'injection de carburant
JP2008514861A (ja) *	2004-10-01	2008-05-08	ローベルトボツシユゲゼルシヤフトミツトベシユレンクテルハフツング	燃料噴射装置のための支持クランプ及び燃料噴射装置
US7802559B2 (en)	2004-10-01	2010-09-28	Robert Bosch Gmbh	Hold-down device for a fuel injection device, and fuel injection device
US10167831B2 (en)	2017-01-13	2019-01-01	Caterpillar Inc.	Accumulator centering mechanism

Also Published As

Publication number	Publication date
EP0915253A3 (fr)	2003-01-02
DE19748593A1 (de)	1999-05-06
DE59810257D1 (de)	2004-01-08
ES2210638T3 (es)	2004-07-01
EP0915253B1 (fr)	2003-11-26

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