EP0657644A2 - Dispositif d'injection de combustible pour moteurs à combustion interne - Google Patents

Dispositif d'injection de combustible pour moteurs à combustion interne Download PDF

Info

Publication number: EP0657644A2
Authority: EP; European Patent Office
Prior art keywords: valve; pressure; injection device; fuel injection; sealing surface
Prior art date: 1993-12-07
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

EP94113012A

Other languages

German (de)

English (en)

Other versions

EP0657644A3 (fr

EP0657644B1 (fr

Inventor

Peter Dipl.-Ing. Müller

Jaroslaw Dipl.-Ing. Hlousek

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.)

Robert Bosch GmbH

Original Assignee

Robert Bosch 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.)

1993-12-07

Filing date

1994-08-20

Publication date

1995-06-14

1994-08-20 Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH

1995-06-14 Publication of EP0657644A2 publication Critical patent/EP0657644A2/fr

1995-12-06 Publication of EP0657644A3 publication Critical patent/EP0657644A3/fr

1999-01-13 Application granted granted Critical

1999-01-13 Publication of EP0657644B1 publication Critical patent/EP0657644B1/fr

2014-08-20 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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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
- 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
- F02M63/0003—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure
- F02M63/0007—Fuel-injection apparatus having a cyclically-operated valve for connecting a pressure source, e.g. constant pressure pump or accumulator, to an injection valve held closed mechanically, e.g. by springs, and automatically opened by fuel pressure using electrically actuated valves
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

the invention is based on a fuel injection device for internal combustion engines according to the preamble of claim 1.
a high-pressure fuel pump delivers fuel from a low-pressure chamber into a high-pressure collection chamber, which is connected via high-pressure lines to the individual injection valves projecting into the combustion chamber of the internal combustion engine to be supplied, this common pressure storage system being kept at a certain pressure by a pressure control device.
an electrically controlled control valve is inserted into the high-pressure lines, which controls the opening and closing of the high-pressure fuel injection at the injection valve.
the control valves on the injection valves are designed as solenoid valves, which open the connection of the high-pressure line to the injection valve at the start of injection and close it again at the end of injection.
the control valves on the known fuel injection devices however, have the disadvantage that it with them it is not possible to shape the injection course at the injection valve.
the main problem here is that the high fuel pressure applied to the injection valve cannot be released quickly enough, which can result in inaccuracies in the control at the end of the injection.
the fuel injection device according to the invention with the characterizing features of claim 1 has the advantage that the end of injection can be safely controlled by means of a relief valve upstream of the relief valve.
This return suction collar removes fuel from the pressure line to the injection valve during the closing movement of the control valve member, so that a rapid pressure drop at the injection end is ensured there.
Another advantage is achieved by the arrangement in the pressure chamber of an annular shoulder acting in the opening direction of the valve for opening the connection between the high-pressure line and the injection valve, by means of which a safety function can be integrated into the control valve.
This ring shoulder is designed so that when a predetermined maximum pressure in the high-pressure line and in the pressure chamber is exceeded, the opening cross-section to the ring space is released to a small extent, which is so small that the opening cross-section does not control the valve seat controlling the connection of the ring space to a relief chamber is completely closed, so that the excess fuel pressure from the annular space relaxes in the relief space and further into a return line to the low-pressure fuel space.
FIG. 1 shows a schematic illustration of the fuel injection device with a longitudinal section through the control valve and the injection valve
FIG. 2 shows an enlarged section of the control valve of FIG. 1, in which the arrangement of an additional annular shoulder on the valve member is shown.
a high-pressure fuel pump 1 is connected on the suction side via a fuel supply line 3 to a fuel-filled low-pressure chamber 5 and on the pressure side via a delivery line 7 to a high-pressure collecting chamber 9.
High-pressure lines 13 lead from the high-pressure plenum 9 to the individual injection valves 15 projecting into the combustion chamber of the internal combustion engine to be supplied, with an electric control valve 17 on each injection valve 15 in the respective one to control the injection process High pressure line 13 is used.
a further pressure storage space 19 is provided in each high-pressure line 13 between the high-pressure collecting space 9 and the control valve 17, the dimensioning of which allows the injection course at the injection valve to be shaped.
the control valve 17 is designed as a 3/2 way valve, the piston-shaped valve member 21 of which is actuated by an electric actuating magnet 25 acting on its one end face.
the actuating magnet 25 is fastened to the valve member via an anchor plate 27 by means of a screw 29 in an axial blind bore of the valve member 21 and counteracts a return spring clamped between the housing 23 and a spring plate 31, which is arranged in a spring chamber 35 of the control valve 17.
the piston-shaped valve member 21 has two mutually facing valve sealing surfaces, of which a first conical valve sealing surface 37 interacts with a conical valve seat 39.
This conical valve sealing surface 37 is formed by a conical cross-sectional reduction of a guide piston part 41, which slides sealingly in a guide bore 43 and projects into the spring chamber 35 with its end facing away from the conical valve sealing surface 37.
the conical valve seat 39 is formed by a reduction in the diameter of the guide bore 43, the sealing being effected via the outside diameter on the valve seat 39 when the valve is closed.
the second valve sealing surface is designed as a flat sealing surface 45 and interacts with a flat valve seat 47.
the flat valve sealing surface 45 is arranged on an axial ring surface facing the conical valve sealing surface 37 of an annular web 49 delimiting the valve member 21 on the side facing away from the actuating magnet 25.
the flat valve seat 47 is formed by a ring shoulder on the guide bore 43 designed as a stepped bore.
the Ring web 49 On the side bearing the flat sealing surface 45 the Ring web 49 to a first ring groove 51, which on the other hand is limited by a suction collar 53.
This suckback collar 53 has only a slightly smaller outside diameter than the guide bore 43 designed as a stepped bore in this area and thus forms on its circumferential surface a throttle section 55 connected upstream of the flat seat valve, which opens into an annular space 57 on the side facing away from the first annular groove 51 the arrangement of a second annular groove 59 on the valve member 21 between the conical valve sealing surface 37 and the suction collar 53 is formed in the guide bore 43 and from which a pressure line 61 leads to the injection valve 15.
the throttle 55 can also be formed by a small difference in diameter between the suction collar 53 and the guide piston part 41 with the same diameter of the guide bore 43 in these areas, the diameter of the guide piston part 41 then being about 5 to 30 ⁇ m larger than the diameter of the suction collar 53, so that there is a corresponding throttle ring gap on the throttle 55.
a pressure chamber 63 adjoins the larger diameter of the conical valve sealing surface 37, into which the high-pressure line 13 opens.
the ring web 49 protrudes with its end facing away from the flat valve seat 47 into a relief chamber 65 which continues axially in the direction facing away from the actuating magnet 25 into a spring chamber 67 of the injection valve 15, in which a valve spring 71 acting on a valve member 69 of the injection valve 15 in the closing direction is arranged and from which a return line 73 leads into the low-pressure chamber 5.
the valve member 69 of the injection valve 15 is provided in a known manner with a conical pressure shoulder 75 which projects into a pressure chamber 77 connected to the pressure line 61 in such a way that the pressure in the pressure chamber 77 acts on the valve member 69 in the opening direction.
An injection channel 79 also leads from the pressure chamber 77 along the valve member 69 to one or more of the Sealing surface at the tip of the valve member 69 controlled injection openings 81 of the injection valve 15 in the combustion chamber, not shown, of the internal combustion engine to be supplied.
the spring chamber 35 of the control valve 17 is connected to the return line 73 via a connecting bore 83, so that the end faces of the valve member 21 are pressure-balanced.
the stroke movement of the valve member 21 is in each case limited by the contact of the valve sealing surfaces 37, 45 on one of the valve seats 39, 47.
the fuel injection device according to the invention works in the following way.
the high-pressure fuel pump 1 conveys the fuel from the low-pressure chamber 5 into the high-pressure collection chamber 9 and thus builds up a high-pressure fuel in the latter. This high fuel pressure continues via the high-pressure lines 13 into the pressure chamber 63 of the individual control valves 17 on the injection valves 15 and also fills the respective pressure storage spaces 19.
the actuating magnet 25 on the control valve 17 is de-energized, so that the return spring 33 holds the valve member 21 via the spring plate 31 with the conical valve sealing surface 37 in contact with the conical valve seat 39, so that the connection between the high pressure fuel chamber 63 and the annular chamber 57 permanently connected to the pressure line 61 to the injection valve 15 is closed and the connection from the annular space 57 into the relief space 65 is open.
the actuating magnet 25 is energized and displaces the valve member 21 of the control valve 17 against the restoring force of the spring 33 until its flat valve sealing surface 45 abuts the flat valve seat 47.
connection of the annular space 57 to the relief space 65 is closed and opened to the pressure line 61, so that the high fuel pressure is now from the pressure chamber 63 via the annular space 57 and the pressure line 61 propagates to the pressure chamber 77 of the injection valve 15 and there the injection at the injection openings 81 takes place in a known manner by lifting the valve member 69 from its valve seat. If the injection is to be ended, the actuating magnet 25 is again de-energized and the return spring 33 moves the valve member 21 back against the conical valve sealing surface 37 against the conical valve seat 39.
the suction collar 53 releases a specific suction volume at the annular space 57 that the high-pressure fuel volume in the pressure line 61 relaxes, so that the fuel pressure in the pressure line 61 and on the injection valve 15 drops very quickly below the closing pressure of the injection valve 15 and the injection valve 15 closes safely.
the further outflow of the fuel from the annular space 57 or the pressure line 61 now takes place via the throttle 55 on the suction collar 53, so that a certain residual pressure remains in the pressure line 61 until the following injection process.
annular shoulder 91 formed by reducing the cross-section of the guide piston part 41, is provided on the valve member 21 in the region of the pressure chamber 63.
This annular shoulder 91 serves as a relief or safety valve, which causes the conical valve seat 39 to open when the overpressure in the high-pressure line 13 is approximately 10%.
the annular shoulder 91 is dimensioned such that it causes only a small opening stroke of the valve member 21, so that the flat seat valve does not close completely and the overpressure from the pressure chamber 63 can relax into the annular chamber 57 and further into the relief chamber 65.

Landscapes

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

EP94113012A 1993-12-07 1994-08-20 Dispositif d'injection de combustible pour moteurs à combustion interne Expired - Lifetime EP0657644B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE4341546A DE4341546A1 (de)	1993-12-07	1993-12-07	Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE4341546		1993-12-07

Publications (3)

Publication Number	Publication Date
EP0657644A2 true EP0657644A2 (fr)	1995-06-14
EP0657644A3 EP0657644A3 (fr)	1995-12-06
EP0657644B1 EP0657644B1 (fr)	1999-01-13

Family

ID=6504297

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP94113012A Expired - Lifetime EP0657644B1 (fr)	1993-12-07	1994-08-20	Dispositif d'injection de combustible pour moteurs à combustion interne

Country Status (4)

Country	Link
US (1)	US5538187A (fr)
EP (1)	EP0657644B1 (fr)
JP (1)	JP3742669B2 (fr)
DE (2)	DE4341546A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19637186A1 (de) *	1995-09-14	1997-03-20	Avl Verbrennungskraft Messtech	Speichereinspritzsystem für eine Brennkraftmaschine
DE19907544A1 (de) *	1999-02-22	2000-08-31	Siemens Ag	Injektor für eine Einspritzanlage einer Brennkraftmaschine

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19512730C1 (de) *	1995-04-05	1996-08-29	Mtu Friedrichshafen Gmbh	Kraftstoffeinspritzanlage für Brennkraftmaschine
DE19547877A1 (de) *	1995-12-21	1997-06-26	Bosch Gmbh Robert	Kraftstoffhochdruckspeichersystem für ein in Brennkraftmaschinen eingesetztes Kraftstoffeinspritzsystem
US5788154A (en) *	1996-05-02	1998-08-04	Caterpillar Inc.	Method of preventing cavitation in a fuel injector having a solenoid actuated control valve
GB9609382D0 (en) *	1996-05-03	1996-07-10	Lucas Ind Plc	Fuel injection system
JP3823391B2 (ja) *	1996-08-31	2006-09-20	いすゞ自動車株式会社	エンジンの燃料噴射装置
DE19712135C1 (de)	1997-03-22	1998-08-13	Mtu Friedrichshafen Gmbh	Kraftstoffeinspritzsystem für eine Brennkraftmaschine
US5860597A (en) *	1997-03-24	1999-01-19	Cummins Engine Company, Inc.	Injection rate shaping nozzle assembly for a fuel injector
DE19728111A1 (de)	1997-07-02	1999-01-07	Bosch Gmbh Robert	Kraftstoffeinspritzsystem
DE19732070C2 (de) *	1997-07-25	2001-02-01	Daimler Chrysler Ag	Direkteinspritzendes Kraftstoffeinspritzventil mit Magnetventilsteuerung für eine mehrzylindrige Brennkraftmaschine
WO1999034111A1 (fr) *	1997-12-23	1999-07-08	Siemens Aktiengesellschaft	Soupape d'injection a vanne de controle
US5967413A (en) *	1998-02-11	1999-10-19	Caterpillar Inc.	Damped solenoid actuated valve and fuel injector using same
GB9812889D0 (en) *	1998-06-15	1998-08-12	Lucas Ind Plc	Fuel injector
US6029632A (en) *	1998-07-21	2000-02-29	Daimlerchrysler Ag	Fuel injector with magnetic valve control for a multicylinder internal combustion engine with direct fuel injection
US6113000A (en) *	1998-08-27	2000-09-05	Caterpillar Inc.	Hydraulically-actuated fuel injector with intensifier piston always exposed to high pressure actuation fluid inlet
DE19842067A1 (de) *	1998-09-15	2000-03-16	Daimler Chrysler Ag	Kraftstoffeinspritzanlage für eine Dieselbrennkraftmaschine
GB9823134D0 (en) *	1998-10-23	1998-12-16	Lucas Ind Plc	Valve
DE19928846A1 (de) *	1999-06-24	2001-03-08	Bosch Gmbh Robert	Common-Rail-Injektor
DE19951554A1 (de) *	1999-10-26	2001-05-10	Bosch Gmbh Robert	Kraftstoffinjektor mit integrierter Durchflussbegrenzung
DE19963367B4 (de) *	1999-12-28	2008-07-31	Robert Bosch Gmbh	Common-Rail-Injektor
DE10001828A1 (de) *	2000-01-18	2001-07-19	Fev Motorentech Gmbh	Direktgesteuerte Kraftstoffeinspritzeinrichtung für eine Kolbenbrennkraftmaschine
DE10065221B4 (de) *	2000-12-27	2007-11-29	Robert Bosch Gmbh	Direkt gesteuertes 2-Sitzventil für Kraftstoffeinspritzsysteme
US7278593B2 (en) *	2002-09-25	2007-10-09	Caterpillar Inc.	Common rail fuel injector
FI117349B (fi) *	2002-08-02	2006-09-15	Waertsilae Finland Oy	Polttoaineen syöttöjärjestelmä
DE10342698A1 (de) *	2003-09-16	2005-04-28	Bosch Gmbh Robert	Druckgesteuerter CR-Injektor
JP5043761B2 (ja) *	2008-06-18	2012-10-10	本田技研工業株式会社	燃料噴射装置
CN107524551B (zh) *	2017-08-31	2020-01-31	重庆红江机械有限责任公司	一种带保压结构的微喷电控喷油器
CN108150662A (zh) *	2018-02-05	2018-06-12	潍坊力创电子科技有限公司	双阀门气体喷射阀

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AU444015B2 (en) *	1968-11-15	1973-12-19	Pritchard Edward	Improvements in or relating to pressure jet burner control systems
FR2145081A5 (fr) *	1971-07-08	1973-02-16	Peugeot & Renault
GB2045347B (en) *	1979-02-24	1983-04-20	Huber Motorenbau Inst	I c engine fuel injection system
JPS5655769U (fr) *	1979-10-05	1981-05-14
JPS60206973A (ja) *	1984-03-30	1985-10-18	Nippon Denso Co Ltd	アキユ−ムレ−タ型燃料噴射ノズル
CH668621A5 (de) *	1986-01-22	1989-01-13	Dereco Dieselmotoren Forschung	Kraftstoffeinspritzanlage fuer eine brennkraftmaschine.
JPS62288366A (ja) *	1986-06-06	1987-12-15	Kubota Ltd	ディーゼルエンジンの燃料噴射装置への燃料供給方法
US4951874A (en) *	1988-09-01	1990-08-28	Diesel Kiki Co., Ltd.	Unit fuel injector
JPH0286953A (ja) *	1988-09-21	1990-03-27	Kanesaka Gijutsu Kenkyusho:Kk	燃料噴射弁
US4948049A (en) *	1989-02-24	1990-08-14	Ail Corporation	Rate control in accumulator type fuel injectors

1993
- 1993-12-07 DE DE4341546A patent/DE4341546A1/de not_active Withdrawn
1994
- 1994-08-20 DE DE59407647T patent/DE59407647D1/de not_active Expired - Fee Related
- 1994-08-20 EP EP94113012A patent/EP0657644B1/fr not_active Expired - Lifetime
- 1994-11-14 US US08/339,684 patent/US5538187A/en not_active Expired - Lifetime
- 1994-12-07 JP JP30395594A patent/JP3742669B2/ja not_active Expired - Fee Related

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19637186A1 (de) *	1995-09-14	1997-03-20	Avl Verbrennungskraft Messtech	Speichereinspritzsystem für eine Brennkraftmaschine
DE19907544A1 (de) *	1999-02-22	2000-08-31	Siemens Ag	Injektor für eine Einspritzanlage einer Brennkraftmaschine
DE19907544C2 (de) *	1999-02-22	2002-12-05	Siemens Ag	Injektor für eine Einspritzanlage einer Brennkraftmaschine

Also Published As

Publication number	Publication date
EP0657644A3 (fr)	1995-12-06
EP0657644B1 (fr)	1999-01-13
DE59407647D1 (de)	1999-02-25
JP3742669B2 (ja)	2006-02-08
JPH07189851A (ja)	1995-07-28
US5538187A (en)	1996-07-23
DE4341546A1 (de)	1995-06-08

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1995-04-28	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
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1999-03-19	ET	Fr: translation filed
1999-03-30	ITF	It: translation for a ep patent filed
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Publication	Publication Date	Title
EP0657644B1 (fr)	1999-01-13	Dispositif d'injection de combustible pour moteurs à combustion interne
EP0960274B1 (fr)	2003-01-29	Dispositif d'injection de carburant pour moteurs a combustion interne
EP0657642B1 (fr)	1999-01-13	Dispositif d'injection de combustible pour moteurs à combustion interne
EP0657643B1 (fr)	1999-01-13	Dispositif d'injection de combustible pour moteurs à combustion interne
DE4414242A1 (de)	1995-10-26	Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
EP0807757A1 (fr)	1997-11-19	Injecteur de combustible pour moteur à combustion interne
DE19709794A1 (de)	1998-09-17	Ventil zum Steuern von Flüssigkeiten
DE4445980C2 (de)	1999-12-30	Einspritzsystem
EP1068445B1 (fr)	2004-03-31	Dispositif d'injection de carburant pour moteurs a combustion interne
DE4243665C2 (de)	2003-11-13	Kraftstoffeinspritzeinrichtung, insbesondere Pumpedüse für Brennkraftmaschinen
DE60215591T2 (de)	2007-08-30	Kraftsoffeinspritzventil
EP0050710A1 (fr)	1982-05-05	Installation d'injection de carburant
DE2750042A1 (de)	1978-05-18	Kraftstoffeinspritzsystem
DE4211651B4 (de)	2004-11-18	Kraftstoffeinspritzeinrichtung, insbesondere Pumpedüse für Brennkraftmaschinen
WO1999018349A1 (fr)	1999-04-15	Soupape d'injection a commande directe, en particulier soupape d'injection de carburant
EP1097303A2 (fr)	2001-05-09	Dispositif d'injection de carburant
EP1923564A2 (fr)	2008-05-21	Injecteur de carburant
EP1373714B1 (fr)	2010-07-28	Soupape d'injection
DE19954288A1 (de)	2001-05-17	Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19936667A1 (de)	2001-02-22	Common-Rail-Injektor
DE29814934U1 (de)	2000-01-05	Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19747092B4 (de)	2005-01-13	Durchflußbegrenzungsvorrichtung für Brennkraftmaschinen
DE68913416T2 (de)	1994-06-01	Hochdruck-Brennstoffeinspritzgerät für Motoren.
EP1961953A1 (fr)	2008-08-27	Soupape à plusieurs voies
DE4410742A1 (de)	1994-10-06	Kraftstoffpumpe