EP1422418A1 - Injecteur de combustible pour moteurs à combustion interne - Google Patents

Injecteur de combustible pour moteurs à combustion interne Download PDF

Info

Publication number: EP1422418A1
Authority: EP; European Patent Office
Prior art keywords: valve; valve needle; diameter; cylindrical section; section
Prior art date: 2002-11-19
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

EP03011992A

Other languages

German (de)

English (en)

Other versions

EP1422418B1 (fr

Inventor

Wolfgang Stoecklein

Holger Rapp

Dietmar Schmieder

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.)

2002-11-19

Filing date

2003-05-28

Publication date

2004-05-26

2003-05-28 Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH

2004-05-26 Publication of EP1422418A1 publication Critical patent/EP1422418A1/fr

2008-02-20 Application granted granted Critical

2008-02-20 Publication of EP1422418B1 publication Critical patent/EP1422418B1/fr

2023-05-28 Anticipated expiration legal-status Critical

Status Expired - Lifetime legal-status Critical Current

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
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/042—The valves being provided with fuel passages
- 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
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
- F02M61/12—Other injectors with elongated valve bodies, i.e. of needle-valve type characterised by the provision of guiding or centring means for valve bodies
- 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
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift

Definitions

the invention relates to a fuel injection valve for Internal combustion engines made from the state of the art is known.
DE 100 24 703 A1 shows a fuel injector that has a valve body has a bore formed therein.
the hole is at the combustion chamber end of a conical valve seat limited, of which at least one injection opening goes off, in the installed position of the fuel injector the combustion chamber of the internal combustion engine opens.
a piston-shaped valve needle is arranged to be longitudinally displaceable, which resulted in a middle section in the bore is.
the valve needle points at its combustion chamber end an essentially conical valve sealing surface, which cooperates with the valve seat and on your, the End facing away from the combustion chamber has an annular seat edge.
the valve needle has a cylindrical section, between the and the wall of the fuel hole which flows to at least one injection opening.
the known fuel injection valve has the disadvantage that the nozzle needle is a quite rigid component represents.
the fuel injector according to the invention with the characteristic Features of claim 1, however, points the advantage that the fuel injector is a has better opening dynamics and the valve needle otherwise unchanged components faster in their longitudinal direction is movable.
the cylindrical section between the valve sealing surface and the guide section is formed on a diameter of is 1.0 to 1.5 times the seat diameter.
the moving ones Forces on the valve needle are determined, among other things about the seat diameter, because of this the surface is determined by the hydraulic pressure in the pressure chamber is applied and thereby generates a longitudinal force that exerted on the cylindrical portion of the valve needle becomes.
the seat diameter on the diameter of the cylindrical section achieve that the valve needle on the one hand is sufficiently high Has longitudinal elasticity to the forces occurring when Put on the valve seat to reduce wear to keep small.
such a diameter of the cylindrical section sufficient to to ensure sufficient stability of the valve needle, so that there is no lateral buckling due to the hydraulic Force comes to the valve sealing surface.
a first advantageous embodiment is on the guide section formed at least one bevel through which the fuel between the wall of the bore and the valve pin can flow through to the injection openings.
the cross section of the at least one bevel is at least as large as the cross section of the ring gap, which in the Area of the cylindrical section between the valve needle and the wall of the bore is formed. hereby throttles the guide section even with a relatively small one Diameter of the cylindrical section the fuel inflow to the at least one injection opening.
the Valve needle provided a circumferential groove that is arranged away from the combustion chamber to the guide section and whose diameter is at least approximately the diameter of the cylindrical section corresponds. Through this grooving the valve needle receives a certain bending elasticity in this area, so that it compensates for malpositions can come inside the valve needle and not a raised one Friction between this and the wall of the bore occur can.
FIG. 1 is a fuel injection valve according to the invention shown in longitudinal section.
a valve body 1 In a valve body 1 is a bore 3 formed on its combustion chamber side End has a conical valve seat 12. From the valve seat 12 go out several injection openings 16, which are in the installed position of the fuel injection valve in the combustion chamber of the internal combustion engine lead.
a piston-shaped Valve needle 5 In the bore 3 is a piston-shaped Valve needle 5 arranged longitudinally, the Valve needle 5 in a centrally arranged guide section 205 is guided in the bore 3. Starting from the management section 205 the valve needle 5 tapers the valve seat 12 and goes into a pressure shoulder 7 in one cylindrical section 105 over. Between the valve needle 5 and the wall of the bore 3, a pressure chamber 10 is formed, flow through the fuel into the injection openings 16 can.
the combustion chamber end of the valve needle 5 is as a valve sealing surface 14 is formed, with FIG 1 in the area of the valve sealing surface 14 shows.
the valve sealing surface 14 comprises a first conical surface 21 and a second conical surface 22, between which one Ring groove 23 runs.
the opening angles of the conical surfaces 21, 22 and the opening angle of the conical valve seat 12 coordinated so that when the valve needle 5 at the conical valve seat 12, the boundary line that at the transition the first conical surface 21 is formed to the annular groove 23, bears as a sealing edge 18 on the valve seat 12.
the valve needle 5 seals when seated on valve seat 12 at the point of Sealing edge 18, the injection openings 16 against the pressure chamber 10th
the hole widens in the end area facing away from the combustion chamber 3 to a spring chamber 25 in which the combustion chamber is remote Spring section 305 of the valve needle 5 is arranged.
the End section of the valve needle 5 facing away from the combustion chamber is of limited a pressure sleeve 29 in which the valve needle 5 out is.
the end of the valve needle facing away from the combustion chamber 5 and the pressure sleeve 29 delimit a control chamber 40, into which an inlet throttle 42 and an outlet throttle 44 open.
the control chamber 40 is connected to the inlet throttle 42 High pressure chamber connected and via the outlet throttle 44th connectable with a leak oil chamber.
a groove 37 is formed on the valve needle 5 between the ring shoulder 34 and the guide section 205, so that the diameter of the valve needle 5 at this point corresponds at least approximately to the diameter D Z of the cylindrical section 105.
a plurality of bevels 20 are formed on the guide section 205 on the valve needle 5, four of which are arranged distributed over the circumference in this exemplary embodiment.
the cuts 20 enable a fuel flow between the guide section 205 and the wall of the bore 3 and are designed such that the entire cross section of the cuts 20 corresponds at least approximately to the cross section of the pressure chamber 10, which is formed in the area of the cylindrical section 105.
the fuel supply for the pressure chamber 10 takes place via an inlet bore, not shown in the drawing, into the spring chamber 25, from where the fuel flows through the bevels 20 into the pressure chamber 10.
the fuel injector works as follows: The spring chamber 25 and thus also the pressure chamber 10 are constantly supplied with fuel under high pressure. Initially, the valve needle 5 is in its closed position, ie it lies with its valve sealing surface 14 on the valve seat 12. The valve needle 5 is held in this position by the pressure in the control chamber 40, which corresponds to the pressure in the pressure chamber 10, and thus closes the injection openings 16. By opening the outlet throttle 44, the pressure in the control chamber 40 drops and thus also the hydraulic force the end of the valve needle 5 facing away from the combustion chamber. Now the hydraulic force on the valve needle 5, as exerted by the pressure in the pressure chamber 10 on the valve needle 5, predominates, in particular on the pressure shoulder 7 and the first cone surface 21.
the closing spring 27 only plays a subordinate role in this process, since the hydraulic forces due to the very high injection pressure of in some cases significantly more than 100 MPa compared to the force of the closing spring 27 are clearly predominant.
the closing spring 27 mainly serves to hold the valve needle 5 in its closed position when the internal combustion engine is switched off.
valve needle 5 Since in modern, high-speed internal combustion engines the speeds of up to 4500 revolutions per minute require very rapid successive injections, the valve needle 5 must be moved from its closed position into the open position in a very short time. In order to accelerate the longitudinal movement of the valve needle 5, either the forces can be increased or the mass of the valve needle 5 can be reduced. In addition, it must be taken into account that with a very rapid movement of the valve needle 5 and correspondingly violent placement on the valve seat 12, strong deformations and vibrations occur in the valve needle 5, which lead to increased wear between the valve sealing surface 14 and the valve seat 12.
the cylindrical section 105 is tapered to such an extent that the diameter D Z corresponds to 1.0 to 1.5 times the diameter of the seat diameter, that is to say the diameter D of the annular seat edge 18.
the longitudinal elasticity thereby increased reduces dynamic Force spraying when the valve needle 5 is placed on the valve seat 12 and thus reduces wear.
This ratio of the diameter D Z of the cylindrical section 105 to the seat diameter D of the seat edge 18 has proven to be particularly advantageous since the longitudinal elasticity of the cylindrical section 105 is optimal in a certain range for a given hydraulic force on the valve sealing surface 14, in that the longitudinal elasticity must not be too high or too low, on the one hand to achieve good vibration damping and on the other hand to avoid destabilization of the valve needle 5 due to a too small diameter.
the groove serves as a compensating element 37, which specifically targets the bending stiffness of the Valve needle 5 reduced. Should it be an easy one Misalignment of the valve needle 5 in the area of the cylindrical Section 105 come, it may be due to the groove 37 come to a compensation and therefore not to one increased friction in the spring sleeve 29. This reduces also the lateral forces in the area of the guide section 205 and thus the friction in this area.
the annular groove on the valve sealing surface 14 21 is omitted and the first conical surface 21 directly on the second Conical surface 22 borders.
the sealing edge 18 is in this Case formed at the transition of the two cone surfaces 21, 22.
the valve sealing surface 14 formed by a single, continuous conical surface becomes. The sealing edge 18 is then at the transition from the cylindrical Section 105 formed to the valve sealing surface 14, which means that the opening angle of the valve sealing surface 14 larger than the opening angle of the conical Valve seat 12 must be.

Landscapes

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

EP03011992A 2002-11-19 2003-05-28 Injecteur de combustible pour moteurs à combustion interne Expired - Lifetime EP1422418B1 (fr)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
DE10253721		2002-11-19
DE2002153721 DE10253721A1 (de)	2002-11-19	2002-11-19	Kraftstoffeinspritzventil für Brennkraftmaschinen

Publications (2)

Publication Number	Publication Date
EP1422418A1 true EP1422418A1 (fr)	2004-05-26
EP1422418B1 EP1422418B1 (fr)	2008-02-20

Family

ID=32185815

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP03011992A Expired - Lifetime EP1422418B1 (fr)	2002-11-19	2003-05-28	Injecteur de combustible pour moteurs à combustion interne

Country Status (3)

Country	Link
EP (1)	EP1422418B1 (fr)
JP (1)	JP2004169699A (fr)
DE (2)	DE10253721A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2006087186A1 (fr) *	2005-02-15	2006-08-24	Siemens Ag	Dispositif d'etancheite pour injecteur de carburant et procede pour realiser un etancheite
WO2006128756A1 (fr) *	2005-06-01	2006-12-07	Robert Bosch Gmbh	Soupape d'injection de carburant de moteurs a combustion interne
WO2016096217A1 (fr) *	2014-12-18	2016-06-23	Robert Bosch Gmbh	Injecteur pour carburants
CN109210253A (zh) *	2018-11-29	2019-01-15	美钻深海能源科技研发（上海）有限公司	一种节流稳定的针式节流阀
CN114592998A (zh) *	2020-12-03	2022-06-07	日本发动机股份有限公司	燃料喷射阀以及船舶用内燃机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JP5716788B2 (ja) *	2013-04-25	2015-05-13	株式会社デンソー	燃料噴射弁

Citations (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3224684A (en) *	1963-04-16	1965-12-21	Hartford Machine Screw Co	Fuel injection nozzle
GB2102877A (en) *	1981-07-25	1983-02-09	Vysoke Uceni Tech Brne	Injection nozzle for fuel injection engines
US4903898A (en) *	1986-11-28	1990-02-27	Robert Bosch Gmbh	Fuel injection valve
EP1030053A2 (fr) *	1999-02-16	2000-08-23	Siemens Aktiengesellschaft	Injecteur pour un dispositif d'injection d'un moteur à combustion interne
EP1063422A1 (fr) *	1999-06-23	2000-12-27	Delphi Technologies, Inc.	Injecteur de combustible
EP1088985A2 (fr) *	1999-09-29	2001-04-04	Siemens Aktiengesellschaft	Injecteur de carburant pour injection directe dans un moteur à combustion interne
DE10013198A1 (de) *	2000-03-17	2001-09-20	Siemens Ag	Injektor für eine Einspritzanlage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB562033A (en) *	1942-11-11	1944-06-15	William Reginald Cobb	Improvements relating to fuel injectors for internal combustion engines
DE4117910A1 (de) *	1991-05-31	1992-12-03	Yaroslavskij Z Dizel Noj Appar	Einspritzduese fuer brennkraftmaschinen
GB9425652D0 (en) *	1994-12-20	1995-02-22	Lucas Ind Plc	Fuel injection nozzle
DE19634933B4 (de) *	1996-08-29	2007-06-06	Robert Bosch Gmbh	Kraftstoffeinspritzventil für Brennkraftmaschinen
DE19820513A1 (de) *	1998-05-08	1999-11-11	Mtu Friedrichshafen Gmbh	Kraftstoffeinspritzdüse für eine Brennkraftmaschine
DE19942370A1 (de) *	1999-09-04	2001-03-22	Bosch Gmbh Robert	Einspritzdüse für Brennkraftmaschinen mit einer Ringnut in der Düsennadel
DE10031264A1 (de) *	2000-06-27	2002-01-17	Bosch Gmbh Robert	Kraftstoffeinspritzventil für Brennkraftmaschinen

2002
- 2002-11-19 DE DE2002153721 patent/DE10253721A1/de not_active Withdrawn
2003
- 2003-05-28 DE DE50309190T patent/DE50309190D1/de not_active Expired - Lifetime
- 2003-05-28 EP EP03011992A patent/EP1422418B1/fr not_active Expired - Lifetime
- 2003-11-14 JP JP2003385454A patent/JP2004169699A/ja active Pending

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3224684A (en) *	1963-04-16	1965-12-21	Hartford Machine Screw Co	Fuel injection nozzle
GB2102877A (en) *	1981-07-25	1983-02-09	Vysoke Uceni Tech Brne	Injection nozzle for fuel injection engines
US4903898A (en) *	1986-11-28	1990-02-27	Robert Bosch Gmbh	Fuel injection valve
EP1030053A2 (fr) *	1999-02-16	2000-08-23	Siemens Aktiengesellschaft	Injecteur pour un dispositif d'injection d'un moteur à combustion interne
EP1063422A1 (fr) *	1999-06-23	2000-12-27	Delphi Technologies, Inc.	Injecteur de combustible
EP1088985A2 (fr) *	1999-09-29	2001-04-04	Siemens Aktiengesellschaft	Injecteur de carburant pour injection directe dans un moteur à combustion interne
DE10013198A1 (de) *	2000-03-17	2001-09-20	Siemens Ag	Injektor für eine Einspritzanlage

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2006087186A1 (fr) *	2005-02-15	2006-08-24	Siemens Ag	Dispositif d'etancheite pour injecteur de carburant et procede pour realiser un etancheite
US7559312B2 (en)	2005-02-15	2009-07-14	Siemens Aktiengesellschaft	Sealing device for a fuel injector, and sealing method
WO2006128756A1 (fr) *	2005-06-01	2006-12-07	Robert Bosch Gmbh	Soupape d'injection de carburant de moteurs a combustion interne
CN101184916B (zh) *	2005-06-01	2011-03-09	罗伯特·博世有限公司	用于内燃机的燃料喷射阀
US8720802B2 (en)	2005-06-01	2014-05-13	Robert Bosch Gmbh	Fuel injection valve for internal combustion engines
WO2016096217A1 (fr) *	2014-12-18	2016-06-23	Robert Bosch Gmbh	Injecteur pour carburants
US10508634B2 (en)	2014-12-18	2019-12-17	Robert Bosch Gmbh	Injection nozzle for fuels
CN109210253A (zh) *	2018-11-29	2019-01-15	美钻深海能源科技研发（上海）有限公司	一种节流稳定的针式节流阀
CN114592998A (zh) *	2020-12-03	2022-06-07	日本发动机股份有限公司	燃料喷射阀以及船舶用内燃机

Also Published As

Publication number	Publication date
JP2004169699A (ja)	2004-06-17
DE50309190D1 (de)	2008-04-03
DE10253721A1 (de)	2004-06-03
EP1422418B1 (fr)	2008-02-20

Publication	Publication Date	Title
EP2171258B1 (fr)	2014-12-17	Soupape de commande pour une soupape d'injection de carburant
EP1567763B1 (fr)	2006-09-27	Soupape d'injection de carburant pour des moteurs a combustion interne
DE19706591A1 (de)	1998-08-27	Druckventil
EP1321661A2 (fr)	2003-06-25	Soupape d'injection de combustible pour moteurs à combustion interne
EP1373715B1 (fr)	2005-01-05	Soupape d'injection de carburant pour moteurs a combustion interne
EP1556607B1 (fr)	2010-07-14	Injecteurs de carburant pour moteurs a combustion interne
EP1563181A1 (fr)	2005-08-17	Soupape d'injection de carburant pour moteurs combustion interne
EP1117922B1 (fr)	2005-03-16	Injecteur a rampe commune
DE10335059A1 (de)	2005-02-17	Schaltventil für einen Kraftstoffinjektor mit Druckübersetzer
EP1346143B1 (fr)	2004-06-16	Soupape d'injection de carburant destinee a des moteurs a combustion interne
EP1422418B1 (fr)	2008-02-20	Injecteur de combustible pour moteurs à combustion interne
DE10205218A1 (de)	2003-10-30	Ventil zur Steuerung einer Verbindung in einem Hochdruckflüssigkeitssystem, insbesondere einer Kraftstoffeinspitzeinrichtung für eine Brennkraftmaschine
EP1433951A1 (fr)	2004-06-30	Injecteur de carburant de moteur à combustion interne
EP1344929A1 (fr)	2003-09-17	Injecteur de combustible pour moteurs à combustion interne
DE19954288A1 (de)	2001-05-17	Kraftstoffeinspritzventil für Brennkraftmaschinen
EP1276987A1 (fr)	2003-01-22	Soupape d'injection de carburant pour moteurs a combustion interne
EP1504189B1 (fr)	2007-07-04	Soupape d'injection de carburant pour moteurs a combustion interne
EP1576283A1 (fr)	2005-09-21	Soupape d'injection de carburant pour moteurs a combustion interne
DE10318989A1 (de)	2003-11-27	Kraftstoffeinspritzventil für Brennkraftmaschinen
EP1621759B1 (fr)	2009-08-05	Injecteur pour rampe commune
EP2655850B1 (fr)	2015-09-09	Injecteur de carburant pour moteurs à combustion interne
EP1740821B1 (fr)	2008-08-27	Injecteur common rail
EP2496822A1 (fr)	2012-09-12	Buse d'injection pour un injecteur de carburant sans fuite
EP1546546A1 (fr)	2005-06-29	Soupape d'injection de carburant pour moteur a combustion interne
DE10337848A1 (de)	2005-03-17	Kraftstoffeinspritzventil für eine Brennkraftmaschine

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