CN1759240A - The Fuelinjection nozzle that is used for internal-combustion engine - Google Patents
The Fuelinjection nozzle that is used for internal-combustion engine Download PDFInfo
- Publication number
- CN1759240A CN1759240A CN 03826217 CN03826217A CN1759240A CN 1759240 A CN1759240 A CN 1759240A CN 03826217 CN03826217 CN 03826217 CN 03826217 A CN03826217 A CN 03826217A CN 1759240 A CN1759240 A CN 1759240A
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- needle
- circular groove
- rib
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 79
- 239000007924 injection Substances 0.000 claims abstract description 79
- 239000000446 fuel Substances 0.000 claims abstract description 38
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 27
- 230000000284 resting effect Effects 0.000 claims description 3
- 241001672694 Citrus reticulata Species 0.000 description 15
- 230000002349 favourable effect Effects 0.000 description 10
- 238000010304 firing Methods 0.000 description 8
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 150000002430 hydrocarbons Chemical class 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
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- 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
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- 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
- F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
- F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
- F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
- F02M45/08—Injectors peculiar thereto
- F02M45/086—Having more than one injection-valve controlling discharge orifices
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- 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
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
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- 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
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
Fuelinjection nozzle, it has a valve body (1), in this valve body, be configured with a hole (3), this hole constitutes the border by the valve seat (13) of a taper on the end of its combustion chamber side, draw a plurality of injection channels (11) from this valve seat, the entry port of these injection channels (16) longitudinal axis (7) with respect to hole (3) in valve seat (13) is positioned on the identical height.A needle (5; 60; 62) be arranged in the hole (3) wall of (3) and needle (5 with longitudinal movement in the hole; 60; 62) be configured with a pressure chamber (20) between, this pressure chamber can be filled by fuel.At needle (5; 60; The end of combustion chamber side 62) is provided with one first conical surface (40) and one and is arranged on second conical surface (42) in downstream with respect to this first conical surface (40), wherein is configured with a seal land (45) between these conical surfaces (40,42).At needle (5; 60; 62) be configured with in second conical surface (42) one around first circular groove (50), this first circular groove extends in one with respect to needle (5; 60; In the radial plane of longitudinal axis 62) (7), and have the rib (51) of a upstream and the rib (52) in a downstream, wherein the rib in this downstream (52) is at needle (5; 60; 62) on the height of the entry port (16) of injection channel (11), extend in the operating position.
Description
Prior art
The present invention relates to the Fuelinjection nozzle that a kind of and the described type of claim 1 are used for internal-combustion engine accordingly.A kind of like this Fuelinjection nozzle is for example open by open source literature DE 198 44 638 A1.This known Fuelinjection nozzle has a valve body at this, and in this valve body, the needle of a piston-like is directed in a hole with longitudinal movement.This hole constitutes the border by the valve seat of a taper on the end of its combustion chamber side, draw injection channel in a plurality of firing chambers of leading to internal-combustion engine the mounting point of Fuelinjection nozzle from this valve seat.The longitudinal axis in the described relatively hole of the entry port of these injection channels is positioned on the identical height.Needle it combustion chamber side on the end of valve seat, have a valve sealing surface of taper basically, this valve sealing surface comprises that one first conical surface and relative this first conical surface are arranged on second conical surface in downstream.Between these two conical surfaces, be configured with a seal land, by the sealing rib, needle in its operating position with the valve seat acting in conjunction, thus when needle rests on the valve seat, fuel from the pressure chamber to the injection channel is interrupted, and wherein the pressure chamber is configured between the wall in needle and described hole.
This known Fuelinjection nozzle has a circular groove on valve sealing surface, this circular groove overlaps with the entry port of injection channel in the operating position of needle at least.This helps fuel to flow in the described injection channel, even on the one hand be because during the slightly different axle center of the relative valve seat of needle, fuel is also distributed to each injection channel equably.On the other hand, owing to different some fluctuations that occur of the rounding degree that carries out the transition to the injection channel place at valve seat, owing to this circular groove influence less because throttling is gone in becoming a mandarin of fuel.
Yet this known Fuelinjection nozzle exists shortcoming at this, promptly this circular groove has big relatively volume, therefore even and if when needle is closed, fuel also can arrive the firing chamber of internal-combustion engine from injection channel, this causes the hydrocarbon emission of internal-combustion engine to increase.
Advantage of the present invention
By contrast, have following advantage according to Fuelinjection nozzle of the present invention, that have the described feature of claim 1: fuel becoming a mandarin in the injection channel gone throttling, and the hydrocarbon emission of internal-combustion engine do not had a negative impact.On second conical surface of needle, be configured with for this reason one around first circular groove, this first circular groove extends in the radial plane of relative longitudinal axis.This around first circular groove have the rib of a upstream and the rib in a downstream at this, wherein the rib in this downstream extends on the height of the entry port of injection channel in the operating position of needle.By this first circular groove, the fuel that the pressure chamber between valve sealing surface and valve seat flows to injection channel becoming a mandarin during flowing into injection channel the time gone throttling (entdrosselt).This position is crucial especially, because the direction of fuel stream at this strong variation takes place, this is accompanied by energy loss usually and is accompanied by little effective jet pressure thus.In addition, but by some fluctuations of this circular groove balance, these fluctuations are owing to following reason produces: the transition from the valve seat to the injection channel is rounded usually, but this is not all can strictness to reproduce in the same manner at all injection channel places.Therefore, different injection channels has different slightly chamfering radius usually at the entry port place, and these different chamfering radius are by the compensation of first circular groove, and this causes obtaining the identical stream mode of going in all injection channels.
Can further construct favourable configuration of the present invention by dependent claims.
In the first favourable configuration, the width of first circular groove is littler than the diameter of the entry port of injection channel.When the very little volume of first circular groove, fuel enters becoming a mandarin of injection channel and is gone throttling, thereby has avoided the raising of hydrocarbon emission reliably like this.
In another favourable configuration, the rib of the upstream of first circular groove and.Or the rib in downstream is constructed roundedly.By the configuration of this circular groove, fuel further is simplified and is gone throttling to becoming a mandarin of injection channel.
In another favourable configuration, the rib of the upstream of first circular groove is configured to seal land, needle on resting on valve seat the time by the sealing of sealing rib.This sealing function is additionally strengthened by first circular groove, because in this case at the higher surface pressure of this region generating.
In another favourable configuration, on second conical surface of needle, be configured with one second circular groove, wherein this second circular groove is arranged on the downstream of first circular groove and parallel with it, and the rib in the downstream of entry port is positioned within second circular groove.By second circular groove, becoming a mandarin also of fuel gone throttling at the rib place in the downstream of the entry port of injection channel, thus, by second circular groove further to the generation favorable influence that becomes a mandarin.Particularly advantageously at this be, keep the zone of a taper between first circular groove and second circular groove, this regional height is less than the diameter of the entry port of injection channel.
Another Fuelinjection nozzle, it is the modification of same solution thinking, this Fuelinjection nozzle has and some advantages identical according to the injection valve of claim 1.In valve seat one of structure around the valve body circular groove replace first circular groove in described second conical surface, this valve body circular groove extends in the radial plane with respect to the axis in hole, and have the rib of a upstream and the rib in a downstream, wherein the rib in this downstream extends by the entry port of injection channel.The effect of going throttling of this valve body circular groove is identical with the effect of going throttling of first circular groove in second conical surface of described needle, yet needle but can keep its original shape at this.
In a favourable configuration according to the Fuelinjection nozzle of claim 7, the width of circular groove is littler than the diameter of the entry port of injection channel.Only form a little volume thus, but fuel is gone throttling reliably to becoming a mandarin of injection channel.Particularly advantageously be, the rib of the upstream of circular groove and.Or the rib in downstream is constructed roundedly.Also can consider at this, one second circular groove of structure in second conical surface of needle, this second circular groove is arranged on the downstream of the circular groove in the valve seat and parallel with the circular groove in this valve seat, and wherein the rib in the downstream of entry port is positioned within second circular groove.
Description of drawings
A plurality of embodiments according to Fuelinjection nozzle of the present invention shown in the drawings.The accompanying drawing table is not:
The sectional arrangement drawing of Fig. 1 Fuelinjection nozzle,
The zoomed-in view of Fig. 2 Fig. 1 in valve seat area,
Another embodiment's of Fig. 3 the view identical with Fig. 2,
Another embodiment of Fig. 4 shows the partial enlarged view of valve seat area at this, and
Another embodiment's of Fig. 5 the view identical with Fig. 4 wherein is provided with the needle that two coaxial hearts lead mutually at this.
Embodiment's explanation
Fig. 1 shows the sectional arrangement drawing according to Fuelinjection nozzle of the present invention.This Fuelinjection nozzle comprises a valve body 1, and this valve body extend in the firing chamber 8 in the end of combustion chamber side that Fuelinjection nozzle is installed in the mounting point in the internal-combustion engine with it.Valve body 1 is equipped with in the centre by turnbuckle 2 to be pressed under the situation of a throttling bodies 4 and keeps on the body 6, wherein turnbuckle 2 by a not shown screw-internal thread fit in the outside thread of the correspondence that keeps body 6.Be configured with a hole 3 in valve body 1, this hole is expanded into a spring housing 22 deviating from combustion chamber side.An input channel of extending in keeping body 6, throttling bodies 4 and valve body 1 10 feeds in the spring housing 22, and by this input channel, spring housing 22 reaches so hole 3 can under high pressure be filled by fuel.Hole 3 constitutes the border in combustion chamber side by the valve seat 13 of a taper, wherein is configured with a plurality of injection channels 11 on the end of the combustion chamber side of valve body 1, and these injection channels feed in the firing chamber 8 of internal-combustion engines.Be provided with the needle 5 of a piston-like in hole 3 with longitudinal movement, this needle has a longitudinal axis 7, and is directed in the section at the middle part in hole 3.Needle 5 has a valve sealing surface 9 of taper basically on the end of its combustion chamber side, needle 5 passes through this valve sealing surface with valve seat 13 actings in conjunction.Be configured with a pressure chamber 20 between the wall in hole 3 and needle 5, this pressure chamber feeds in the spring housing 22 deviating from combustion chamber side, and fuel flows to injection channel 11 from spring housing 22 through these pressure chambers.Valve sealing surface 9 carries out in the following manner with the acting in conjunction of valve seat 13: when needle 5 rests on the valve seat 13,20 fuel that flow to injection channel 11 are blocked from the pressure chamber, and when needle 5 when valve seat 13 lifts, the fuel between valve sealing surface 9 and valve seat 13 passes injection channel 11 and flows into.The fuel that flows to injection channel 11 from spring housing 22 guides by a plurality of flat surface grindings 17 that formed enough passage sections a zone, and in described zone, needle 5 is directed in hole 3.
In spring housing 22, be provided with a sleeve 24, this liner ring around needle 5 back to the end of firing chamber and rest on the throttling bodies 4.Constituted the border in a control room 26 by the end face 32 back to the firing chamber, sleeve 24 and the throttling bodies 4 of needle 5, this control room is connected with spring housing 22 by an input throttle structure 34 that is configured on the sleeve 24.Control room 26 can be connected with a unshowned in the drawings draining chamber by a discharge throttle structure 36 that is configured in the throttling bodies 4, and wherein this connection can be closed by a control valve 14.Around needle 5 in the spring housing 22 of the end of firing chamber, be provided with a closing spring 28, this closing spring at one end is supported on the sleeve 24, and on the other end was supported on spring seat 30 around needle 5, wherein closing spring 28 had compressive pre-stress.Preload by closing spring 28 obtains a power that acts on the spring seat 30, and owing to spring seat 30 is supported on the needle 5, thereby this power that acts on the spring seat 30 also acts on the needle 5, and thus, needle 5 is crushed on the valve seat 13 with valve sealing surface 9.
The control that fuel sprays is carried out in the following manner: in the beginning of a spraying cycle, control valve 14 is closed and is discharged throttle structure 36, so that in control room 26 by the input throttle structure 34 have with spring housing 22 in identical pressure, this causes a hydraulic coupling on the end face 32 that acts on needle 5, this hydraulic coupling is pressed in this needle 5 on the valve seat 13, thus, injection channel 11 is closed.Spray if desired, then control valve 14 is opened and is discharged throttle structure 36, and this causes, and pressure reduces in the control room 26.Thus, these hydraulic couplings that act on the part on the pressure shoulder 15 and that act on valve sealing surface 9 are preponderated now, so that needle 5 lifts from valve seat 13, and fuel 20 flows to injection channel 11 from the pressure chamber.By operation control valve 14 again, in control room 26, set up high fuel pressure once more, and needle 5 slides and turns back in its operating position.
Fig. 2 shows among Fig. 1 the zoomed-in view with the part that II marked.The valve sealing surface 9 of needle 5 comprises that one first conical surface 40 and relative this first conical surface are positioned at second conical surface 42 in downstream.Transition position at first conical surface, 40 to second conical surfaces 42 is configured with a seal land 45, and the sealing rib causes sealing when needle 5 rests on the valve seat 13.Be configured with one first circular groove 50 in second conical surface 42, this first circular groove extends in the radial plane of longitudinal axis 7 of a relative needle 5, and has the rib 51 of a upstream and the rib 52 in a downstream.The rib 52 in this downstream extends on the height of the entry port 16 of injection channel 11, thereby fuel becoming a mandarin in the injection channel 11 gone throttling.The entry port 16 of injection channel 11 has diameter a, and this diameter a is greater than the diameter D of injection channel 11, and this realizes by following method: the end 18 of the upstream of entry port 16 and the end 19 in downstream are rounded with radius R to the transition position of valve seat 13 at injection channel 11.
When fuel was walked around seal land 45 flow to injection channel 11 between second conical surface 42 and valve seat 13 from pressure chamber 20, fuel must experience strong directionization in flowing into injection channel 11 time.This causes strong energy loss usually, and causes the jet pressure in the injection channel 11 correspondingly to reduce thus.By chamfering radius R this influence is alleviated slightly, but this influence also exists, and cause jet pressure to reduce at entry port 16 places.Yet by first circular groove 50, fuel becoming a mandarin in the injection channel 11 gone throttling, and thus, the speed that fuel enters in the injection channel 11 is higher, and has the jet pressure of corresponding higher effective thus.To the become a mandarin generation favorable influence of fuel in the injection channel 11, be configured with one second circular groove 53 abreast with first circular groove 50 for further on second conical surface 42, this second circular groove also has the rib 54 of a upstream and the rib 55 in a downstream.The end 19 in the downstream of entry port 16 in the operating position of needle 5 relatively longitudinal axis 7 between the rib 55 in the rib 54 of the upstream of second circular groove 53 and downstream.Thus, second circular groove 53 also help fuel the critical localisation place of the end 19 in the downstream of entry port 16, becoming a mandarin in the injection channel 11.
The throttling of minimizing when fuel flows in the injection channel 11 mainly is to have meaning in the partial journey zone, though promptly lift when also not reaching its range from valve seat 13 when needle 5.Therefore, for effectively going throttling importantly, in Fig. 2 with the distance of the rib 55 in the downstream of rib 51 relative second circular grooves 53 of e upstream that indicate, first circular groove 50, greater than the distance between the end 19 in the end 18 of the upstream of entry port 16 and its downstream.With the height y of second circular groove 53 height x about equally, first circular groove 50 at this preferably less than the diameter D of injection channel 11.This is enough for effectively going throttling, and this only causes that the volume that keeps increases a little between the downstream of seal land 45 second conical surface 42 and valve seat 13 in the operating position of needle 5.This volume is more little, and the hydrocarbon emission of internal-combustion engine is favourable more, because only there is fuel seldom to arrive in the firing chamber 8 between these real injections by injection channel 11 uncontrollably.
Fig. 3 shows another embodiment according to Fuelinjection nozzle of the present invention, should the part only be left-half wherein.Some is different for the configuration of the circular groove 50,53 on second conical surface 42 and structure shown in Figure 2: first circular groove 50 directly links to each other with seal land 45, so that first conical surface 40 is not close to second conical surface 42.In the case, entry port 16 is provided with in this wise, so that entry port 16 or injection channel 11 are identical with respect to being provided with of first circular groove 50 and relative second circular groove 53.
Figure 4 illustrates part another embodiment, same as shown in Figure 3.Needle 5 only has second circular groove 53 at this on second conical surface 42, and has cancelled first circular groove 50.The substitute is and in valve seat 13, be configured with a valve body circular groove 57, this valve body circular groove in the operating position of needle 5 roughly first circular groove 50 in relative longitudinal axis 7 and embodiment shown in Figure 2 when needle 5 rests on the valve seat 13, extend on the identical height.By valve body circular groove 57, fuel becomes a mandarin and is gone throttling by first circular groove 50 is the same in the embodiment shown in Figure 2 to injection channel 11, but go into the stroke that stream mode keeps less relying on needle 5, because the position of valve body circular groove 57 relative entry ports 16 does not change with the stroke of needle 5.As the embodiment of front, realized the throttling of going at 19 places, end in the downstream of entry port 16 by second circular groove 53.On second conical surface 42, a cannelure 56 can be set in addition, this cannelure with second circular groove 53 be connected at formed volume between the end face 47 of the combustion chamber side of needle 5 and the valve body 1.By this discharge degree of second circular groove 53, the throttling of going that becomes a mandarin in injection channel 11 has been produced additional favourable influence.
In order to optimize throttling, the rib 58 of the upstream of valve body circular groove 57 can be constructed with the rib 59 in downstream roundedly, because sharp-pointed rib causes fluid breakdown at fuel fast in flowing easily, thereby and causes flow resistance to increase.For the optimum efficiency of valve body circular groove 57, the rib 58 of the upstream of valve body circular groove 57 is approximately 0.02 to 0.2mm with the distance of seal land 45 in the operating position of needle 5.
Fig. 5 shows another embodiment, is not in this embodiment to be provided with only single needle, but is provided with two needles, and these two needles insert concentrically with respect to one another.Needle 60 has one first conical surface 63 and one second conical surface 64 on the end of its combustion chamber side, wherein be configured with a circular groove 70 in second conical surface 64.Needle 60 has a vertical hole 61, is provided with an inner valve needle 62 with longitudinal movement in this vertical hole 61.On the end of the combustion chamber side of inner valve needle 62, be configured with a mitre velve sealing surface 66, in this mitre velve sealing surface 66, be configured with a circular groove 72.The relative longitudinal axis 7 of an alternative only row is positioned at the entry port 11 on the equal height, is provided with two injection channels row 11a and 11b at this, and wherein outside injection channel row 11a is controlled by needle 60, and inboard injection channel row 11b is by needle 62 controls.In order to make fuel be gone throttling to the trip of going among the injection channel of the upstream row 11a in the mode in the previous embodiment, circular groove 70 acts in an identical manner at this.Equally, fuel is gone throttling to the circular groove 72 of the rib 74 in become a mandarin a rib 73 by having a upstream and the downstream of the injection channel in downstream row 11b, wherein work as inner valve needle 62 and be in its operating position, the rib 74 in described downstream extends on the height of the entry port of interior injection channel row 11b.
The diameter D of these injection channels 11 is preferred in all embodiments in the scope of 80-150 μ m, and this makes that the diameter of circular groove 50,53,57 must be less than the diameter of these injection channels 11.Small like this circular groove can preferably be set in needle 5 or the valve seat 13 by laser, because machining process does not possess essential precision usually at this.
Claims (11)
1. the Fuelinjection nozzle that is used for internal-combustion engine, it has: a valve body (1), in this valve body, be configured with a hole (3), this hole (3) constitutes the border by the valve seat (13) of a taper on the end of its combustion chamber side, draw a plurality of injection channels (11) from this valve seat, the entry port of these injection channels (16) longitudinal axis (7) with respect to hole (3) in valve seat (13) is positioned on the identical height; A needle (5; 60; 62), this needle is arranged in the hole (3) with longitudinal movement, is configured with a pressure chamber (20) between the wall of this needle and hole (3), and this pressure chamber can be filled by the fuel under the jet pressure; One at needle (5; 60; The valve sealing surface of constructing on the end of combustion chamber side 62) (9), this valve sealing surface comprises one first conical surface (40) and second conical surface (42) that is arranged on the downstream with respect to this first conical surface (40), wherein at these conical surfaces (40,42) be configured with a seal land (45) between, needle (5; 60; 62) in its operating position, pass through the same valve seat of sealing rib (13) acting in conjunction, so that when needle (5; 60; When 62) resting on the valve seat (13), the fuel stream that is flowed to injection channel (11) by pressure chamber (20) is interrupted, it is characterized by: in second conical surface (42) of needle, be configured with one around first circular groove (50), this first circular groove extends in one with respect to needle (5; 60; In the radial plane of longitudinal axis 62) (7), and have the rib (51) of a upstream and the rib (52) in a downstream, wherein the rib in this downstream (52) is at needle (5; 60; 62) on the height of the entry port (16) of injection channel (11), extend in the operating position.
2. according to the Fuelinjection nozzle of claim 1, it is characterized by: the width of first circular groove (50) is less than the diameter (D) of the entry port (16) of these injection channels (11).
3. according to the Fuelinjection nozzle of claim 1, it is characterized by: the rib (51) of the upstream of first circular groove (50) and/or the rib (52) in downstream are constructed roundedly.
4. according to the Fuelinjection nozzle of claim 1, it is characterized by: the rib (51) of the upstream of first circular groove (50) constitutes seal land (45).
5. according to the Fuelinjection nozzle of claim 1, it is characterized by: at needle (5; 60; 62) be configured with one second circular groove (53) in second conical surface (42), wherein this second circular groove is arranged on the downstream of first circular groove, and parallel with this first circular groove, wherein the end (19) in the downstream of entry port (16) is within second circular groove (53).
6. according to the Fuelinjection nozzle of claim 5, it is characterized by: have the little height of diameter in zone second conical surface (42), that between first circular groove (50) and second circular groove (53), keep than the entry port (16) of injection channel (11).
7. the Fuelinjection nozzle that is used for internal-combustion engine, it has: a valve body (1), in this valve body, be configured with a hole (3), this hole (3) constitutes the border by the valve seat (13) of a taper on the end of its combustion chamber side, draw a plurality of injection channels (11) from this valve seat, the entry port of these injection channels (16) longitudinal axis (7) with respect to hole (3) in valve seat (13) is positioned on the identical height; A needle (5; 60; 62), this needle is arranged in the hole (3) with longitudinal movement, is configured with a pressure chamber (20) between the wall of this needle and hole (3), and this pressure chamber can be filled by the fuel under the jet pressure; One at needle (5; 60; The valve sealing surface of constructing on the end of combustion chamber side 62) (9), this valve sealing surface comprises one first conical surface (40) and second conical surface (42) that is arranged on the downstream with respect to this first conical surface (40), wherein at these conical surfaces (40,42) be configured with a seal land (45) between, needle (5; 60; 62) in its operating position, pass through the same valve seat of sealing rib (13) acting in conjunction, so that when needle (5; 60; When 62) resting on the valve seat (13), the fuel stream that is flowed to injection channel (11) by pressure chamber (20) is interrupted, it is characterized by: in valve seat (13), be configured with one around valve body circular groove (57), this valve body circular groove extends in a radial plane of the longitudinal axis (7) of relative opening (3), and have the rib (58) of a upstream and the rib (59) in a downstream, wherein the rib in this downstream (59) extends within the entry port (16) of injection channel (11).
8. according to the Fuelinjection nozzle of claim 7, it is characterized by: the width of valve body circular groove (57) is less than the diameter of the entry port (16) of injection channel (11).
9. according to the Fuelinjection nozzle of claim 7, it is characterized by: the rib (58) of the upstream of valve body circular groove (57) and/or the rib (59) in downstream are constructed roundedly.
10. according to the Fuelinjection nozzle of claim 7, it is characterized by: at needle (5; 60; 62) be configured with one second circular groove (53) in second conical surface (42), wherein this second circular groove is arranged on the downstream of valve body circular groove (57) and parallel with it, and wherein the end (19) in the downstream of entry port (16) is positioned within second circular groove (53).
11. the Fuelinjection nozzle according to claim 1 or 7 is characterized by: draw two injection channel row (11a from valve seat (13); 11b), in these two injection channel rows, outside injection channel row (11a) is arranged on inboard injection channel row's (11b) upstream; In needle (60), be configured with a vertical hole (61), in this vertical hole (61), be provided with an inner valve needle (62), this inner valve needle has the valve sealing surface (66) of a taper on the end of its combustion chamber side, in this valve sealing surface, be configured with a circular groove (72), this circular groove has the rib (73) of a upstream and the rib (74) in a downstream, and wherein the rib in this downstream (74) is positioned in the operating position of inner valve needle (62) on inboard injection channel row's (11b) the height of entry port.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10313225.2 | 2003-03-25 | ||
| DE2003113225 DE10313225A1 (en) | 2003-03-25 | 2003-03-25 | Fuel injection valve for internal combustion engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1759240A true CN1759240A (en) | 2006-04-12 |
Family
ID=32946137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03826217 Pending CN1759240A (en) | 2003-03-25 | 2003-08-22 | The Fuelinjection nozzle that is used for internal-combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1627148A1 (en) |
| JP (1) | JP2006514210A (en) |
| CN (1) | CN1759240A (en) |
| DE (1) | DE10313225A1 (en) |
| WO (1) | WO2004085832A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101365874B (en) * | 2006-08-31 | 2011-07-06 | 三菱重工业株式会社 | Fuel injection valve |
| CN104775959A (en) * | 2014-01-15 | 2015-07-15 | 大陆汽车有限公司 | Valve assembly and fluid injector for a combustion engine |
| CN104948349A (en) * | 2014-03-24 | 2015-09-30 | 罗伯特·博世有限公司 | Double valve needle air injector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TR200402050A2 (en) * | 2004-08-18 | 2006-03-21 | Robert Bosch Gmbh | Dual seating diameter injector with coaxial areal contact |
| DE102005020365A1 (en) * | 2005-05-02 | 2006-11-09 | Robert Bosch Gmbh | Valve, in particular fuel injection valve |
| DE102005029024A1 (en) * | 2005-06-22 | 2007-01-04 | Siemens Ag | Nozzle assembly has a injector body whereby nozzle needle is arranged axially moveable in injector needle recess and has a sealing geometry in tip region of nozzle needle |
| US7578450B2 (en) | 2005-08-25 | 2009-08-25 | Caterpillar Inc. | Fuel injector with grooved check member |
| US20070200011A1 (en) * | 2006-02-28 | 2007-08-30 | Caterpillar Inc. | Fuel injector having nozzle member with annular groove |
| EP2369166B1 (en) * | 2010-03-22 | 2017-12-13 | Delphi International Operations Luxembourg S.à r.l. | Injection nozzle |
| DE102010063355A1 (en) * | 2010-12-17 | 2012-06-21 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
| JP5716788B2 (en) * | 2013-04-25 | 2015-05-13 | 株式会社デンソー | Fuel injection valve |
| EP3156640B1 (en) * | 2015-10-14 | 2020-12-30 | Vitesco Technologies GmbH | Nozzle body for a fluid injector and fluid injector |
| FR3057623B1 (en) * | 2016-10-14 | 2020-12-25 | Delphi Int Operations Luxembourg Sarl | FUEL INJECTOR VALVE MEMBER |
| RU2724287C1 (en) * | 2020-01-10 | 2020-06-22 | Александр Александрович Стуров | Injector sprayer for diesel internal combustion engine |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2998183B2 (en) * | 1990-09-18 | 2000-01-11 | 日産自動車株式会社 | Fuel injection nozzle |
| JPH04318277A (en) * | 1991-04-17 | 1992-11-09 | Nissan Motor Co Ltd | Fuel injection nozzle |
| JPH07259704A (en) * | 1994-03-24 | 1995-10-09 | Nissan Diesel Motor Co Ltd | Fuel injection nozzle for internal combustion engine |
| JP3799857B2 (en) * | 1999-02-02 | 2006-07-19 | トヨタ自動車株式会社 | Fuel injection valve injection hole structure |
| JP3567838B2 (en) * | 1999-04-26 | 2004-09-22 | トヨタ自動車株式会社 | Fuel injection nozzle |
| ATE472677T1 (en) * | 1999-10-06 | 2010-07-15 | Delphi Tech Holding Sarl | FUEL INJECTION VALVE |
| JP4221898B2 (en) * | 2000-02-29 | 2009-02-12 | 株式会社デンソー | Fuel injection nozzle |
| IT1319988B1 (en) * | 2000-03-21 | 2003-11-12 | Fiat Ricerche | CLOSING PLUG OF A NOZZLE IN AN INTERNAL COMBUSTION FUEL INJECTOR. |
| JP2003120474A (en) * | 2001-10-15 | 2003-04-23 | Hino Motors Ltd | Fuel injection nozzle |
-
2003
- 2003-03-25 DE DE2003113225 patent/DE10313225A1/en not_active Withdrawn
- 2003-08-22 EP EP03747819A patent/EP1627148A1/en not_active Withdrawn
- 2003-08-22 JP JP2004569830A patent/JP2006514210A/en not_active Withdrawn
- 2003-08-22 CN CN 03826217 patent/CN1759240A/en active Pending
- 2003-08-22 WO PCT/DE2003/002817 patent/WO2004085832A1/en not_active Application Discontinuation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101365874B (en) * | 2006-08-31 | 2011-07-06 | 三菱重工业株式会社 | Fuel injection valve |
| CN104775959A (en) * | 2014-01-15 | 2015-07-15 | 大陆汽车有限公司 | Valve assembly and fluid injector for a combustion engine |
| CN104775959B (en) * | 2014-01-15 | 2018-07-17 | 大陆汽车有限公司 | Valve member and fluid ejector for combustion engine |
| CN104948349A (en) * | 2014-03-24 | 2015-09-30 | 罗伯特·博世有限公司 | Double valve needle air injector |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2004085832A1 (en) | 2004-10-07 |
| JP2006514210A (en) | 2006-04-27 |
| EP1627148A1 (en) | 2006-02-22 |
| DE10313225A1 (en) | 2004-10-07 |
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