CN103635684A - Injector, in particular fuel injector for internal combustion engine - Google Patents
Injector, in particular fuel injector for internal combustion engine Download PDFInfo
- Publication number
- CN103635684A CN103635684A CN201280029117.1A CN201280029117A CN103635684A CN 103635684 A CN103635684 A CN 103635684A CN 201280029117 A CN201280029117 A CN 201280029117A CN 103635684 A CN103635684 A CN 103635684A
- Authority
- CN
- China
- Prior art keywords
- sparger
- chamber
- valve
- volume
- valve body
- 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.)
- Granted
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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
- 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
- F02M47/027—Electrically actuated valves draining the chamber to release the closing 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
- 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
- F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
-
- 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
- F02M2200/31—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements
- F02M2200/315—Fuel-injection apparatus having hydraulic pressure fluctuations damping elements for damping fuel pressure fluctuations
-
- 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
- F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
-
- 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
- F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
- F02M2547/003—Valve inserts containing control chamber and valve piston
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to an injector, in particular a fuel injector for an internal combustion engine, having an actuator module (8) controlling a valve (15) for adjusting a flow rate of a fluid medium, wherein the valve (15) links a control chamber (14) for controlling a control piston to a low pressure area. According to the invention an injector is provided which is improved with regard to the process for the manufacture thereof. This is achieved in that the control chamber (4) is connected to a storage volume, wherein the length of the volume chamber is the same for different injectors, irrespective of the injector.
Description
Technical field
The present invention relates to a kind of sparger, especially the fuel injector of internal-combustion engine, has actuator module, and described actuator module is controlled for adjusting the valve of flowing medium flow, wherein, described valve is used in the control chamber of controlling a control piston and is connected with area of low pressure.
Background technique
This sparger is known from DE102007044356A1.This sparger is for injecting fuel into the combustion chamber of internal-combustion engine, it has adjustable needle body between operating position and the mobile enable possition of starting fluid, described needle body can utilize the valve with sleeve-shaped valve element to control, and wherein said valve element interacts with the valve seat being arranged on structural element.This sparger have by described valve element around and the pushing pin of separating with described structural element, and described valve seat is configured to cylindrical cone.Finally, arrange a chamber in the valve body of described sparger, described chamber is connected with the area of low pressure of described sparger by passage.
Summary of the invention
Task of the present invention is to provide a kind of sparger, and described sparger is being improved aspect its manufacturing process.
The settling mode of this task is that described control chamber is connected with a storage volume, and the volume chamber length of described storage volume is configured to sparger irrelevant, and for different spargers, all length is identical.This configuration based on understanding be based on structure sparger true and that for example client needs under internal-combustion engine situation there is different total lengths, wherein, described sparger is a part for ejecting system especially.This ejecting system has high-pressure service pump, and described high-pressure service pump is supplied to the flowing medium of fuel form in high pressure accumulator.Sparger that described high pressure accumulator utilization forms according to the present invention connects, and described sparger is ejected into the fuel of carrying from high pressure accumulator the combustion chamber of configuration sparger of internal-combustion engine.By for example differently under the condition of cylinder of internal-combustion engine of design, for the sparger of different internal-combustion engines, there is different total lengths.So the volume chamber length of described storage volume forms identical length for different spargers now, so described sparger is being standardized aspect described manufacturing process and manufacture cost is lowered.The reduction of manufacture cost is because of the sparger for different length, only must provide a drilling tool for the manufacture of described storage volume.Further, by the standardization of described sparger, until comprise in the region of storing volume, mutually coordinate better the precision of the jet performance of different spargers.So obtain for example simple especially control device, described control device no longer must differently be coordinated each sparger.
The sparger control chamber with storage volume is constructed according to following understanding:
In state of rest, under sparger situation constructed according to the invention, closing force is greater than the opening force forming by fuel.Described closing force is because controlling the change in pressure in chamber, wherein, in state of rest, controls in chamber under high pressure.The entrance throttle that described control chamber is being opened by input channel utilization and being connected with the high-pressure area of fuel system, and the speed control muffler that described control chamber is being opened by discharge route utilization, valve is controlled and being connected with the area of low pressure of described fuel system.By operating described actuator module and causing that thus described valve opens, pressure drop and described control piston in described control chamber leave from valve seat, motion in the valve body cone end of described sparger, and described control piston is especially configured to needle body.When the described valve of closure, described discharge route is closed, and by the fuel of input channel bypass, described needle body moves to again on described valve seat.Therefore described injection finishes.Consider now that described pressure wave directly affects described emitted dose precision and multi-injection ability in the opening and closing process of described injection channel and by controlling the pressure difference Activate pressure ripple in chamber.In very short intermittence between twice injection, existing sparger produces very large mixing ripple.By storage volume being configured on sparger to what is called " micro-rail ", wherein said storage volume is under fuel high pressure, and these pressure surges are attenuated.This has following result, and the mixing ripple between twice injection obviously reduces and accuracy of spray raising.In principle, structure and the layout of the described storage volume for function of the present invention are variable.But prove, if described storage volume is the storage chamber being connected with described control chamber, this is favourable, and in another design proposal, described storage chamber is arranged in the valve body of described sparger again at least as much as possible.The all characteristics that belong to definite sparger here, all can be considered about structure and the size of described storage volume.
In another design proposal, propose again, the described storage chamber ground connection that is connected with valve body convex shoulder is extended along valve body around described needle body.Now, valve body guiding element is projected in described storage chamber and in this region and is directed to by the section of tip side.So described storage chamber allows to be incorporated in described sparger under the prerequisite of manufacture cost that does not change sparger.
In improvement project of the present invention, described sparger has different total lengths, and described sparger has consistent volume chamber length y, and it extends to the convex shoulder of ejection side end of described storage volume from valve body convex shoulder always.Now, described storage volume forms again identical diameter d under different sparger situations, thereby can use identical instrument for all application scenarios.Diameter d is with respect to the outer diameter d of valve body
a, be approximately d=0.3xd
ato d=0.55xd
a, total length y, with respect to diameter d, is approximately that y=6xd is to y=9.5xd.
In another design proposal of the present invention, total storage volume approximately equal of the sparger of different length.Described total storage volume is mainly determined by the actual volume of described storage chamber.Storage sub-chamber additionally determines total storage volume on not half, wherein, described storage sub-chamber determines by the actual volume obtaining to described valve seat from described convex shoulder, thereby the difference of each sparger on total length always stored volume to the difference obtaining thus and do not produced large impact.The difference producing can for example compensate by needle guiding part adaptive insertion depth in storage chamber.
In improvement project of the present invention, total storage volume of minimum possible sparger with the ratio of the longest possible sparger in 0.8 to 1.2 scope, preferably in 0.95 to 1.05 scope.It is particularly advantageous that this design proposal has been proved to be.
In a word, according to design proposal of the present invention, allow to obtain following advantage:
It is minimum that the amount of feed of-described high-pressure service pump reduces to,
-when low pressure, carry out (new) startup,
It is minimum that-instrument pattern reduces to,
-the surface of exerting pressure is reduced,
The performance t of-sparger
diffimprove,
Total storage volume of-injector interior does not rely on sparger length, is approximate consistent,
-manufacture process is simplified,
-breakout pressure does not rely on sparger length, and improve and be approximate consistent,
-because the surface of exerting pressure is less, pressure fatigue strength improves,
-multi-injection ability improves (t
diff-performance), and
-emitted dose precision improves (t
diff-performance).
From accompanying drawing explanation, obtain other favourable design proposal of the present invention, in accompanying drawing explanation, at length set forth the embodiment shown in figure of the present invention.
Accompanying drawing explanation
Shown in the drawings:
Fig. 1 passes through according to the longitudinal section of sparger of the present invention; With
Fig. 2 through for different length two valve bodies of the sparger of constructing dissect each longitudinal section obtaining.
Embodiment
Fig. 1 illustrates fuel injector, is particularly useful for the common rail fuel injection system of self-igniting internal combustion engine.In this common-rail injection system, fuel is supplied with by high pressure accumulator (rail) and is stored in high pressure accumulator by high-pressure service pump.Fuel injector according to the present invention is connected by high pressure pipe line with high pressure accumulator, and described high pressure pipe line is connected with connecting tube 1 bolt of fuel injector.Filter 2 is arranged in connecting tube 1, makes the impurity that may exist in fuel away from fuel injector.
The fuel of supplying with by connecting tube 1 is supplied with to controlling chamber 4 through the input channel 3 of throttle valve is installed, and controls chamber 4 and is arranged in needle guiding part 6 in the tip side of needle body 5.Needle guiding part 6 is arranged and is fixed in valve body 7 in the mode abutting on valve body convex shoulder 20 in a side, and wherein, connecting tube 1 also bolt is connected in valve body 7.Further, actuator module 8 is arranged near needle guiding part 6 or valve body 7, and its function will be described hereinafter.
Valve body cone end 9 utilizes locking nut 10, with control chamber 4 opposite be fixed on valve body 7.Needle body 5 is along with needle body cone end 11 extends until in the tip side region of valve body cone end 9, and form valve seat 19, fuel is by allowing needle cone end 11 injection channels that enter 12, by injection channel 12, under the state of opening of needle body 5, be ejected in the combustion chamber of internal-combustion engine, injection channel 12 is closed by the fuel supply structure of setting forth below.
In order to supply the fuel to the valve seat 19 of injection channel 12 upstreams, supply passage 3 is connected with valve seat 19 chamber above along needle body 5 by a flow channel, and wherein, valve seat 19 consists of needle body cone end 11 and valve body cone end 9.In this flow channel, storage chamber 16 is switched in the valve body 7 of needle body 5.Further, the mobile connection not showing is equally directed to from needle Compress Spring chamber 18, until be connected to the needle cone end 11 on valve seat 19.Further, needle body 5 is compressing towards the direction of valve seat 19 from the needle body spring 13 being arranged in needle body spring chamber 18, so, control the pressure support ventilation of the fuel pressure effect in chamber 4 to needle body 5.
For needle body 5 and its needle body cone end 11 are moved in enable possition to pass through injection channel 12 burner oils, the fuel pressure of controlling in chamber 4 reduces substantially, until the fuel pressure existing overcomes the power of needle body spring 13 in the direction towards controlling chamber 4, compression needle body 5.
In order to be controlled at the fuel pressure of controlling in chamber 4, control chamber 4 and by discharge route 14, utilize the throttle valve of connecting and be connected with the valve 15 being operated by actuator module 8, wherein, valve 15 is connected with the area of low pressure of fuel system in actuator module side.If in the enable possition that valve 15 moves to it by actuator module 8, fuel flows to the area of low pressure of fuel system via valve 15 by discharge route 14 from controlling chamber 4, and therefore the pressure of controlling in chamber 4 decline.Now, the throttle valve in supply passage 3 and discharge route 14 is coordinated, to such an extent as to the fuel that the fuel ratio flowing out by discharge route 14 flow in control chamber 4 by supply passage 3 is many.
At valve 15 and discharge route 12, pass through in needle body 5 opening and closing processes, Activate pressure ripple, described pressure wave directly affects emitted dose precision and multi-injection ability.This pressure wave is propagated and until valve seat 19 and be connected injection channel 12 in the flow channel of definition on the whole above.
In order at least to reduce this pressure wave, control chamber 4 and be connected with storage chamber 6, control chamber 6 and be arranged in valve body 7 around needle body 5 ground.Storage chamber 16 is with major diameter and and then from controlling chamber 4 and extending to the first convex shoulder 17(valve body 7 and have swedged other storage sub-chamber, pass through needle body spring chamber 18 until valve seat 19 with large volume).
Two valve bodies 7 of the sparger of different length shown in Figure 2.Identical to the defined length y of convex shoulder 17 length under the situation of two valve bodies 7 from valve body convex shoulder 20.
Claims (according to the modification of the 19th of treaty)
1. sparger, fuel injector in particular for internal-combustion engine, there is actuator module (8), described actuator module (8) is controlled for adjusting the valve (15) of flowing medium flow, wherein, the control chamber (14) that described valve (15) is used in control one control piston is connected with area of low pressure, this sparger is manufactured like this, be that described control chamber (4) is connected with a storage volume, the volume chamber length of described storage volume is configured to that different spargers is not all relied on to sparger and has identical length.
2. sparger according to claim 1, is characterized in that, described storage volume is storage chamber (16).
3. sparger according to claim 2, is characterized in that, described storage chamber (16) is arranged in the valve body (7) of described sparger.
4. according to the sparger described in claim 2 or 3, it is characterized in that, described storage chamber (16) is connected ground connection along valve body (7) around the control piston extension that is constructed to needle body (5) with valve body convex shoulder (20).
5. according to sparger in any one of the preceding claims wherein, it is characterized in that, always store volume and be greater than 1500cm
3, be especially greater than 2000cm
3.
6. according to sparger in any one of the preceding claims wherein, it is characterized in that, the sparger with different total lengths has consistent volume chamber length y, and it extends to a convex shoulder (17) from valve body convex shoulder (20).
7. according to sparger in any one of the preceding claims wherein, it is characterized in that, total storage volume with the sparger of different length equates.
8. according to sparger in any one of the preceding claims wherein, it is characterized in that, total storage volume of minimum possible sparger with the ratio of the longest possible sparger in 0.8 to 1.2 scope, preferably in 0.95 to 1.05 scope.
Claims (8)
1. sparger, fuel injector in particular for internal-combustion engine, there is actuator module (8), described actuator module (8) is controlled for adjusting the valve (15) of flowing medium flow, wherein, the control chamber (14) that described valve (15) is used in control one control piston is connected with area of low pressure, it is characterized in that
Described control chamber (4) is connected with a storage volume, and the volume chamber length of described storage volume is configured to that different spargers is not all relied on to sparger and has identical length.
2. sparger according to claim 1, is characterized in that, described storage volume is storage chamber (16).
3. sparger according to claim 2, is characterized in that, described storage chamber (16) is arranged in the valve body (7) of described sparger.
4. according to the sparger described in claim 2 or 3, it is characterized in that, described storage chamber (16) is connected ground connection along valve body (7) around the control piston extension that is constructed to needle body (5) with valve body convex shoulder (20).
5. according to sparger in any one of the preceding claims wherein, it is characterized in that, always store volume and be greater than 1500cm
3, be especially greater than 2000cm
3.
6. according to sparger in any one of the preceding claims wherein, it is characterized in that, the sparger with different total lengths has consistent volume chamber length y, and it extends to a convex shoulder (17) from valve body convex shoulder (20).
7. according to sparger in any one of the preceding claims wherein, it is characterized in that thering is total storage volume approximately equal of the sparger of different length.
9. according to sparger in any one of the preceding claims wherein, it is characterized in that, total storage volume of minimum possible sparger with the ratio of the longest possible sparger in 0.8 to 1.2 scope, preferably in 0.95 to 1.05 scope.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011077618A DE102011077618A1 (en) | 2011-06-16 | 2011-06-16 | Injector, in particular fuel injector for an internal combustion engine |
| DE102011077618.4 | 2011-06-16 | ||
| PCT/EP2012/059614 WO2012171767A1 (en) | 2011-06-16 | 2012-05-23 | Injector, in particular fuel injector for an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103635684A true CN103635684A (en) | 2014-03-12 |
| CN103635684B CN103635684B (en) | 2017-06-20 |
Family
ID=46320897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280029117.1A Active CN103635684B (en) | 2011-06-16 | 2012-05-23 | The fuel injector of injector, especially internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2721282B1 (en) |
| CN (1) | CN103635684B (en) |
| DE (1) | DE102011077618A1 (en) |
| WO (1) | WO2012171767A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697922A (en) * | 2003-03-04 | 2005-11-16 | 西门子公司 | High pressure fuel accumulator |
| EP1967727A2 (en) * | 2007-03-08 | 2008-09-10 | Robert Bosch Gmbh | Fuel injector with improved implementation of a control valve for controlling an injection needle |
| CN101415934A (en) * | 2006-04-04 | 2009-04-22 | 罗伯特·博世有限公司 | Fuel injector |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007044356A1 (en) | 2007-09-17 | 2009-03-19 | Robert Bosch Gmbh | injector |
| DE102009046582A1 (en) * | 2009-11-10 | 2011-05-12 | Robert Bosch Gmbh | Method for manufacturing a fuel injection valve and fuel injection valve |
| DE102009055129A1 (en) * | 2009-12-22 | 2011-06-30 | Robert Bosch GmbH, 70469 | Fuel injector |
| DE102010003202A1 (en) * | 2010-03-24 | 2011-09-29 | Robert Bosch Gmbh | Common rail injector with pressure compensated switching valve and additional storage volume |
-
2011
- 2011-06-16 DE DE102011077618A patent/DE102011077618A1/en not_active Withdrawn
-
2012
- 2012-05-23 CN CN201280029117.1A patent/CN103635684B/en active Active
- 2012-05-23 EP EP12728421.4A patent/EP2721282B1/en active Active
- 2012-05-23 WO PCT/EP2012/059614 patent/WO2012171767A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1697922A (en) * | 2003-03-04 | 2005-11-16 | 西门子公司 | High pressure fuel accumulator |
| CN101415934A (en) * | 2006-04-04 | 2009-04-22 | 罗伯特·博世有限公司 | Fuel injector |
| EP1967727A2 (en) * | 2007-03-08 | 2008-09-10 | Robert Bosch Gmbh | Fuel injector with improved implementation of a control valve for controlling an injection needle |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2721282B1 (en) | 2018-07-11 |
| WO2012171767A1 (en) | 2012-12-20 |
| DE102011077618A1 (en) | 2012-12-20 |
| EP2721282A1 (en) | 2014-04-23 |
| CN103635684B (en) | 2017-06-20 |
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