EP3308011A1 - Ventilvorrichtung für ein kraftstoffeinspritzsystem und kraftstoffeinspritzsystem - Google Patents
Ventilvorrichtung für ein kraftstoffeinspritzsystem und kraftstoffeinspritzsystemInfo
- Publication number
- EP3308011A1 EP3308011A1 EP16726580.0A EP16726580A EP3308011A1 EP 3308011 A1 EP3308011 A1 EP 3308011A1 EP 16726580 A EP16726580 A EP 16726580A EP 3308011 A1 EP3308011 A1 EP 3308011A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve device
- pressure
- valve
- diameter
- valve seat
- 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.)
- Ceased
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
- 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
- F02M63/0005—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 valves actuated by fluid pressure
-
- 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
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/005—Pressure relief valves
-
- 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
- F02M2200/28—Details of throttles in fuel-injection apparatus
Definitions
- Valve device for a fuel injection system
- the invention relates to a valve device for a fuel injection system, which can be used in particular as a pressure relief ⁇ valve for relieving a high pressure area of a power ⁇ fuel injection system. Furthermore, the invention relates to a fuel injection system comprising such a valve device.
- a diesel fuel is usually on a pressure range of 1500 bar to 3000 bar
- Pressure range from 200 bar to 350 bar compressed.
- valve devices see ⁇ provided that ensure that is diverted to high pressure from the fuel injection system.
- a valve device in the fuel injection system which is designed as such a pressure ⁇ limiting valve, usually has a fixed set opening pressure at which the valve device opens to prevent the high pressure in the Fuel injection system these particular items will be damaged.
- valve device which is designed as Druckbe ⁇ limit valve opens with a too strong stroke.
- a normal stroke of a sealing element is usually between 3 ym and 30 ym.
- the stroke of the sealing element within the valve device can become up to 1 mm, which can result in damage to elements of the valve device. This damage could lead to leakage, whereby the valve device loses its principal function.
- Reducing a diameter of a valve seat of the valve device is not a suitable option to reduce the air-affected too large stroke, since it is desirable that the opening pressure of the valve device at a high flow rate in the range of about 100 1 / h is not much greater than that Opening pressure at a low flow in the range of about 6 1 / h.
- Fig. 6 shows a currently used, known valve device 10, for example, as a pressure relief valve 12 in
- FIG. 7 shows a characteristic in which the opening pressure of the pressure-limiting valve 12 shown in FIG. 6 is set by the pressure-limiting valve 12 as a function of the flow rate.
- the valve device 10 has a sealing element 14 which cooperates with a valve seat 18 arranged in a valve plate 16 so as to close a high-pressure inlet bore 20 which carries a fluid in the valve device 10.
- the opening pressure characteristic shown in Fig. 7 depends 18 of a diameter D V s of the valve seat, the oblique line in Di ⁇ agrammen Fig. 7 shows the opening pressure characteristic of the valve device 10 of Fig. 6.
- the colored area marks a tolerance pressure range in which the opening pressure of the valve device 10 may be located. As can be seen, the opening pressure increases with increasing flow through the valve device 10, but must not increase too much. In the present example, a pressure difference of the upper opening pressure between a low flow rate and a high flow rate may not be greater than about 100 bar.
- the aim is therefore to propose a valve device which has a flat opening pressure characteristic.
- a flat Publ ⁇ design pressure characteristic can be realized only with a sufficiently large diameter D V s of the valve seat 18th Therefore, it is not advantageous to reduce the diameter D V s of the valve seat 18 in order to compensate for negative influences on the valve device 10 due to air pockets in the fuel injection system and the instability of the valve device 10 incoming therefrom.
- the object of the invention is therefore to propose a valve device, in spite of a flat opening pressure characteristic air bubbles in a through the valve device to be performed fluid have little influence on the stability of the valve device.
- a fuel injection system comprising such a valve device is the subject of the independent claim.
- a valve device for a fuel injection system has a high-pressure inlet bore for fluidically connecting a high-pressure region of the fuel injection system to the valve device and a valve seat cooperating with a sealing element along a longitudinal axis of the valve device for opening and closing the high-pressure inlet bore.
- the high pressure inlet bore has a first diameter adjacent the valve seat and spaced apart from the valve seat an aperture of a second diameter smaller than the first diameter.
- the aperture is spaced from the valve seat, so that a Publ ⁇ design pressure characteristic of the valve device further is flat, because a diameter of the valve seat remains unchanged.
- the aperture is therefore at maximum specified Flow through the valve device has almost no influence on the normal function of the valve device. Only when the valve device tends to become unstable, when air bubbles are present in the fuel injection system, and as a result, a stroke of the valve device normally increases, does the diaphragm become active causing a pressure drop and thus limiting the stroke.
- the first diameter of the high-pressure inlet bore preferably corresponds substantially to a diameter of the valve seat.
- the valve seat and the first diameter of the high-pressure inlet bore have in particular a value in the range of 0.7 mm to 0.85 mm, preferably 0.75 mm to 0.8 mm. If the diameters of valve seat and high-pressure feed bore are preferably in this range, a flat opening pressure characteristic of the valve device can be achieved.
- the second diameter of the diaphragm advantageously has a value of 0.4 mm to 0.6 mm.
- the diaphragm can advantageously become active in the presence of air bubbles in the fuel injection system and cause a pressure drop, whereby the otherwise too large stroke of the valve device can be limited.
- the diaphragm along the longitudinal axis of the valve device has a length of 0.8 mm to 1.2 mm.
- a transition region for connecting the first diameter and the second diameter is provided, which is arranged obliquely to a longitudinal axis of the valve device.
- valve seat In an advantageous embodiment directed to the valve seat upper edge of the aperture is at a distance of 0.8 mm we ⁇ tendonss to 1.2 mm spaced apart from the valve seat at ⁇ sorted.
- the diaphragm preferably has almost no negative influence on the opening pressure at higher flow rates through the valve device, so that further a flat opening pressure characteristic of the valve device is maintained.
- the opening pressure of the valve device is therefore due to the spaced arrangement of the diaphragm, for example, at a flow rate of 6 1 / h in a range as at a flow rate of 100 1 / h, with which the fluid flows through the valve device.
- the diaphragm is formed in a bush pressed into the high-pressure inlet bore, which has a flow-through bore for fluidically connecting the high-pressure region and the valve seat.
- the high-pressure inlet bore can be produced as known and only one additional element is pressed into the high-pressure inlet bore, which then realizes the diaphragm.
- processing steps on the high-pressure inlet bore can preferably be avoided.
- the diaphragm is arranged on a directed to the valve seat end of the socket.
- the diaphragm may also be arranged centrally in the bushing along the longitudinal axis of the valve device. This can have the advantage that a less sharp-edged transition between a small diameter of the orifice and a large diameter of the high-pressure inlet bore or flow bore can thereby be realized, as a result of which turbulences within the high-pressure inlet orifice are achieved. hole or the flow hole can be preferably avoided.
- the bushing as a whole is also arranged at a distance from the sealing seat.
- the high-pressure inlet bore and the valve seat are formed in a valve plate so as to make the assembly of the valve device easier than if the
- High-pressure inlet bore and the valve seat are formed together with other elements of a single housing part.
- the high-pressure feed bore has, in the area of the valve seat, a first diameter which is greater than the second diameter which is present in the region of the aperture of the high-pressure inlet bore.
- the high-pressure inlet bore additionally in the flow direction in front of the orifice, that is even further away from the valve seat, has a third diameter, which is preferably larger than the first diameter, so as to enable a largely laminar flow from the high-pressure region to the valve seat.
- a biasing spring is provided, which is designed in particular as a spiral spring to bias the sealing element with a biasing force along the longitudinal axis of the valve device in the direction of the valve seat.
- the valve device is designed as a solenoid valve device with a movable along the longitudinal axis of the valve device armature. This makes it possible to actively influence the opening stroke of the valve device.
- the anchor is between the 0
- Tensioning spring and the sealing element arranged so as to be able to take a ⁇ advantageous influence on the biasing force of the biasing spring can.
- the sealing element is designed as a ball, which in particular has a diameter of 1 mm to 1.5 mm.
- the valve device has at least one Abêtbohrung for discharging a fluid from the valve device.
- the diameter of this at least one Abêtbohrung is preferably greater than the diameter of the sealing element.
- the large diameter of the Abêtbohrung is advantageous so as to be able to realize a rapid outflow of the fluid from the valve device.
- the valve device is formed as a pressure relief valve for relieving a high-pressure region of a fuel injection system, wherein the Druckbegren ⁇ relief valve is designed in particular such that it relieves the fuel injection system in a pressure range of 200 bar to 3000 bar. Particularly preferred is a discharge in the range between 1500 bar and 3000 bar, which corresponds to a pressure range in diesel applications.
- a fuel injection system for injecting a motor substance in at least one combustion chamber of an internal combustion engine comprises a high-pressure fuel pump for pressurizing the fuel at high pressure and a high fuel ⁇ pressure pump downstream downstream KraftstoffSpeicherbe ⁇ rich for storing the pressurized fuel, wherein at the high-pressure fuel pump and / or to the Fuel ⁇ storage area a valve device is arranged as described above.
- FIG. 1 shows a longitudinal section of a fuel injection system with a high-pressure fuel pump, a fuel storage area and a valve device as a pressure-limiting valve;
- Fig. 2 is a longitudinal sectional view through a Ventilvor direction, which may be arranged in a fuel injection system according to FIG. 1;
- Valve device in a first embodiment 4 shows a detailed detail from the longitudinal sectional illustration in FIG. 2 in the region of the valve seat in a second embodiment; 5 shows a detailed detail from the longitudinal sectional illustration in FIG. 2 in the region of the valve seat in a third embodiment;
- Fig. 6 is a longitudinal sectional detail view of a valve device of the prior art in the region of
- Fig. 7 is a diagram showing the desired opening pressure of in
- FIG. 2 to Fig. 6 showing the valve devices shown in response to a flow rate through the Ven ⁇ tilvorraum.
- Fig. 1 shows a longitudinal sectional view of a fuel injection system 22, with which a fuel can be injected into at least one combustion chamber of an internal combustion engine.
- the fuel injection system 22 includes a high-pressure fuel pump 24 and a fuel storage area 26.
- the fuel is subjected to a high pressure, for example diesel at a pressure between 1500 bar and 3000 bar or gasoline with a pressure between 200 bar and 350 bar.
- a high pressure for example diesel at a pressure between 1500 bar and 3000 bar or gasoline with a pressure between 200 bar and 350 bar.
- the fuel is admitted from a low-pressure region 30 into a pressure chamber 32 of the high-pressure fuel pump 24 via an inlet valve 28.
- a pump piston 34 driven by a drive arrangement 36, translates back and forth and reduces or increases the volume of the pressure chamber 32.
- the fuel in the pressure chamber 32 is compressed and thus pressurized.
- the fuel from the pressure chamber 32 via an exhaust valve 38 is discharged into the fuel storage area 26.
- a valve device 10 is provided, which is designed as a pressure relief valve 12 to pressure as existing at too high in the High-pressure range 40 Abzu Tavernn fuel from the high pressure area 40.
- the valve device 10 as shown in Fig. 1, arranged so that it connects the high-pressure region 40 with the pressure chamber 32 of the high-pressure fuel pump 24.
- the pressure limiting valve 12 controls excess fuel in the pressure chamber 32.
- the pressure relief valve 12 it is also possible to arrange the pressure relief valve 12 so that it abgrest the fuel in the low pressure region 30 in front of the high-pressure fuel pump 24.
- the pressure limiting valve 12 is arranged in a pump housing 42 of the high-pressure fuel pump 24 adjacent to the outlet valve 38.
- the pressure relief valve 12 may also be arranged on a housing of the fuel storage area 26.
- the pressure relief valve 12 is simple
- FIG. 2 shows a longitudinal sectional view of a valve device 10 in a first embodiment, as it is the subject of the present application.
- the valve device 10 includes a valve plate 16 in which a valve seat 18 and a high pressure inlet bore 20 are formed, the high pressure inlet bore 20 connecting the valve device 10 to a high pressure region 40 of the fuel injection system 22.
- a sealing element 14 is provided which is designed in particular as a ball 44.
- Abêtbohrept 46 are provided, through which a fluid from the valve device 10 can be omitted.
- the fluid is preferably a fuel.
- a pre-tension spring 54 in particular a coil spring
- Sealing member 14 which is movably arranged in a valve housing 52 to ⁇ pressed by a along a longitudinal axis 56 of the valve device 10 acting biasing force F v of the biasing spring 54 to the valve seat 18 and so the valve device 10 is kept closed. Only when a pressure of a fluid in the high pressure supply hole 20, this biasing force F v of the pre ⁇ tension spring overcomes 54, lifts the sealing element 14 from the valve seat 18, and are so free a flow, whereby the fluid via the spill ports 46 of the valve device 10 and thus can also flow from the high-pressure region 40, wherein the high-pressure region 40 is relieved.
- FIG. 3 shows a detailed view of the valve device 10 from FIG. 2 in the first embodiment of the valve device 10.
- the high-pressure inlet bore 20 is realized here by a simple bore in the valve plate 16 and has a plurality of diameters.
- a first diameter D i H of ⁇ Hochdruckzu barrel bore 20 adjacent to the valve seat 18 is disposed and has substantially the same diameter D H i as the valve seat 18 with its diameter D V s ⁇ spaced from the valve seat 18, ie against the flow direction of a fluid flowing through the valve device 10, the high-pressure inlet bore 20 has a second diameter D H. 2, which is formed smaller than the first diameter D H i.
- a shutter 58 is formed, which becomes active when air pockets are present in the fluid in the fuel injection system 22 and thereby a valve without orifice 58 would become unstable, ie the stroke of
- the Hochscherzu ⁇ barrel bore 20 connects the valve device 10 with the high pressure region 40 of the fuel injection system 22, and it is advantageous if the high-pressure inlet bore 20 here has an enlarged diameter D H 3, to thus allow a laminar possible flow into the valve device 10 ,
- a transition region 60 is present, which connects the respective diameters, and the obliquely to the Longitudinal axis 56 of the valve device 10 is arranged so as to contribute to a laminar flow through the valve device 10 therethrough.
- the first diameter D H i and also the diameter D V s of the valve seat 18 are in a range of 0.7 mm to 0.85 mm, in the present embodiment between 0, 75 mm and 0, 8 mm.
- the diameter D H 2 in the region of the diaphragm 58 is in a range between 0.4 mm and 0.6 mm.
- An upper edge 62 of the orifice 58, which is directed toward the valve seat 18, is spaced from the valve seat 18 by a distance d that varies in the range of 0.8 mm and 1.2 mm.
- FIG. 4 shows a second embodiment of the valve device 10, wherein a bushing 64 is provided, which is pressed into the high ⁇ pressure inlet bore 20, and having a through ⁇ flow bore 66 through which the fluid from the high-pressure region 40 to the valve seat 18 pass can.
- the aperture 58 is formed here by a constriction of the flow bore 66.
- the diaphragm 58 is arranged on an end 68 of the bushing 64 facing the valve seat 18.
- the diaphragm 58 is provided centrally in the bushing 64, as shown in FIG.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015210800.7A DE102015210800A1 (de) | 2015-06-12 | 2015-06-12 | Ventilvorrichtung für ein Kraftstoffeinspritzsystem und Kraftstoffeinspritzsystem |
| PCT/EP2016/062518 WO2016198311A1 (de) | 2015-06-12 | 2016-06-02 | Ventilvorrichtung für ein kraftstoffeinspritzsystem und kraftstoffeinspritzsystem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3308011A1 true EP3308011A1 (de) | 2018-04-18 |
Family
ID=56097123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP16726580.0A Ceased EP3308011A1 (de) | 2015-06-12 | 2016-06-02 | Ventilvorrichtung für ein kraftstoffeinspritzsystem und kraftstoffeinspritzsystem |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3308011A1 (de) |
| KR (1) | KR20170059470A (de) |
| CN (1) | CN107667217A (de) |
| DE (1) | DE102015210800A1 (de) |
| WO (1) | WO2016198311A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19822671A1 (de) * | 1998-05-20 | 1999-11-25 | Bosch Gmbh Robert | Druckbegrenzungsventil |
| EP2138708A1 (de) * | 2008-06-27 | 2009-12-30 | C.R.F. Società Consortile per Azioni | Brennstoffeinspritzvorrichtung mit Mess-Servoventil für einen Verbrennungsmotor |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62134916A (ja) * | 1985-12-06 | 1987-06-18 | Daihen Corp | 巻線装置 |
| DE19827267A1 (de) * | 1998-06-18 | 1999-12-23 | Bosch Gmbh Robert | Kraftstoff-Einspritzventil für Hochdruck-Einspritzung mit verbesserter Steuerung der Kraftstoffzufuhr |
| DE10059425A1 (de) * | 2000-11-30 | 2002-06-06 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe für Brennkraftmaschinen, insbesondere Dieselmotoren |
| DE10112163A1 (de) * | 2001-03-14 | 2002-09-19 | Bosch Gmbh Robert | Speichereinspritzsystem (Common Rail) für Brennkraftmaschinen |
| US7441546B2 (en) * | 2005-07-28 | 2008-10-28 | Denso Corporation | Valve apparatus |
| DE102007016134A1 (de) * | 2006-04-25 | 2007-11-08 | Robert Bosch Gmbh | Kraftstoff-Hochdruckpumpe |
| DE102010049035A1 (de) * | 2010-10-21 | 2012-04-26 | Kendrion Binder Magnete Gmbh | Hochdruckregelventil |
| EP2728163B1 (de) * | 2012-10-30 | 2016-08-17 | Delphi International Operations Luxembourg S.à r.l. | Ventilanordnung |
| JP5857980B2 (ja) * | 2013-02-06 | 2016-02-10 | 株式会社日本自動車部品総合研究所 | 電磁弁 |
| DE102013214589A1 (de) * | 2013-07-25 | 2015-01-29 | Robert Bosch Gmbh | Schaltventil für einen Kraftstoffinjektor |
-
2015
- 2015-06-12 DE DE102015210800.7A patent/DE102015210800A1/de not_active Ceased
-
2016
- 2016-06-02 CN CN201680034294.7A patent/CN107667217A/zh active Pending
- 2016-06-02 KR KR1020177010975A patent/KR20170059470A/ko not_active Ceased
- 2016-06-02 EP EP16726580.0A patent/EP3308011A1/de not_active Ceased
- 2016-06-02 WO PCT/EP2016/062518 patent/WO2016198311A1/de not_active Ceased
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19822671A1 (de) * | 1998-05-20 | 1999-11-25 | Bosch Gmbh Robert | Druckbegrenzungsventil |
| EP2138708A1 (de) * | 2008-06-27 | 2009-12-30 | C.R.F. Società Consortile per Azioni | Brennstoffeinspritzvorrichtung mit Mess-Servoventil für einen Verbrennungsmotor |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2016198311A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107667217A (zh) | 2018-02-06 |
| WO2016198311A1 (de) | 2016-12-15 |
| DE102015210800A1 (de) | 2016-12-15 |
| KR20170059470A (ko) | 2017-05-30 |
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