CN100449140C - Piston for a high pressure piston cylinder unit of an injection valve - Google Patents
Piston for a high pressure piston cylinder unit of an injection valve Download PDFInfo
- Publication number
- CN100449140C CN100449140C CNB2004100634728A CN200410063472A CN100449140C CN 100449140 C CN100449140 C CN 100449140C CN B2004100634728 A CNB2004100634728 A CN B2004100634728A CN 200410063472 A CN200410063472 A CN 200410063472A CN 100449140 C CN100449140 C CN 100449140C
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- Prior art keywords
- piston
- high pressure
- mentioned
- cylinder
- injection valve
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- 238000002347 injection Methods 0.000 title claims abstract description 53
- 239000007924 injection Substances 0.000 title claims abstract description 53
- 238000002485 combustion reaction Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000007921 spray Substances 0.000 claims description 22
- 239000011241 protective layer Substances 0.000 claims description 18
- 238000010304 firing Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 claims description 4
- 229910001573 adamantine Inorganic materials 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 230000005518 electrochemistry Effects 0.000 claims description 3
- 238000005381 potential energy Methods 0.000 claims description 3
- 239000002912 waste gas Substances 0.000 claims description 2
- 230000000712 assembly Effects 0.000 claims 1
- 238000000429 assembly Methods 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 17
- 238000003860 storage Methods 0.000 description 8
- 239000000295 fuel oil Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 229910000760 Hardened steel Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
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
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
-
- 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
-
- 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
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
-
- 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
- F02M2200/02—Fuel-injection apparatus having means for reducing wear
-
- 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
- F02M2200/90—Selection of particular materials
- F02M2200/9038—Coatings
-
- 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
- F02M61/166—Selection of particular materials
-
- 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
Abstract
This high pressure piston includes a piston having a surface area provided with not only a groove (22) but also an abrasion resistance protection layer, and a cylinder bore (19) with the piston (20) arranged movably in its inside, in the cylinder unit (15) used for the control valve or the injection valve (10) for the combustion engine.
Description
Technical field
The present invention relates to a kind of piston of high pressure piston of the cylinder assembly that is used for internal-combustion engine control valve or injection valve, and relate to a kind of high pressure piston that is used for the cylinder assembly of internal-combustion engine control valve or injection valve, and relate to a kind of being used for to having above-mentioned this piston or having the control valve or the injection valve of combustion chambers of internal combustion engines atomizing of liquids of the high pressure piston of above-mentioned this cylinder assembly, also relate to the high pressure piston in above-mentioned this piston and the above-mentioned this cylinder assembly and the application of above-mentioned this control valve or injection valve.
Background technique
In the specifically large-scale diesel engine of internal-combustion engine especially diesel engine, water to be sprayed in each firing chamber usually, and also will spray into fuel oil.The purpose of water spray is to reduce the nitrogen oxides from exhaust gas (N0 of the internal-combustion engine that pollutes the environment
x) content.Except directly to firing chamber water spray, also can prepare water-fuel emulsification liquid, spray in the firing chamber then.Under the situation of large-scale firing chamber, normally each cylinder is provided with the injection valve and the nozzle of a plurality of water sprays and fuel oil, so that the better distribution in the firing chamber of fuel oil and water, and reduce its maximum temperature wittingly.
In recent years, developed by the oil spout of public main line principle and/or the method for water spray.In this method, fuel oil and/or water are subjected to a high-pressure service pump or are pressurizeed by high-pressure service pump itself respectively, send into then in the high pressure liquid-storage container, or infeed in separately the high pressure liquid-storage container.The high pressure liquid-storage container can directly be connected with the injection valve that has nozzle or be connected with the injection valve that has nozzle by control valve, so that spray into fuel oil and/or water according to ignition procedure to the firing chamber.Pressure in the high pressure liquid-storage container is equivalent to jet pressure substantially.
Have found that, the injection valve of internal-combustion engine or the piston of control valve stand to wear and tear largely, and this situation is particularly useful for the ejecting system according to public main line principle, because in this case, high pressure is influential, does not also reduce in whole piston stroke.A reason of wearing and tearing is that for example piston centering in cylinder-bore is improper too early, thereby causes the card to piston to squeeze.
European patent EP-A-1066466 is openly a kind of excessively to be used for the high pressure piston of the cylinder assembly of the jet pump of injected fuel in internal-combustion engine or injection valve, the groove that spacing is 0.05～1mm is set on the surface of this piston, because this groove has been arranged, pressure distributes more even on the circumferential surface of piston, adopt this structure, the centering of piston makes moderate progress, and has reduced wearing and tearing.In above-mentioned groove, fuel oil is arranged, also further obtain lubrication effect.The illustrated details of above-mentioned EP-A-1066466 is applicable to injection diesel oil.
; when when combustion chambers of internal combustion engines is sprayed water; piston and the wearing and tearing on the cylinder-bore at injection and control valve are more obvious; even it is also like this that piston face is provided with groove; because anticorrosive necessary inert passive layer goes to pot owing to rubbing and boning on the piston; like this, correlated parts makes owing to corrosion damages.So known injection of prior art and control valve are bigger in when water spray wearing and tearing, can not reach expected service life according to the working life of the injection of oil spout and control valve.
Summary of the invention
The objective of the invention is to make the piston of the high pressure piston in the cylinder assembly of a kind of control that can be used for internal-combustion engine or injection valve, and make the high pressure piston of the cylinder assembly of a kind of control that is used for internal-combustion engine or injection valve with above-mentioned this piston, spray into the liquid especially control or the injection valve of water with a kind of being used for to combustion chambers of internal combustion engines, their wearing and tearing when water spray are all littler than the prior art, and the working life of the injection of the oil spout of working life of their water sprays and prior art and control valve is suitable.Another object of the present invention provides above-mentioned this piston and the high pressure piston of above-mentioned this cylinder assembly or the method for control or injection valve used.
Can reach above-mentioned purpose according to the present invention by the high pressure piston in the cylinder assembly of the piston of claim 1 regulation, claim 2 regulation with by the injection of claim 7 regulation or control valve and by the method for claim 9 regulation.
In first embodiment, the present invention has the piston of high pressure piston of the cylinder assembly of control that is used for internal-combustion engine or control valve, and the surface of this piston not only is provided with groove but also protective layer with wear-resistant preferably anti-stick.
In second embodiment of the present invention; high pressure piston with cylinder assembly of control that is used for internal-combustion engine or injection valve; this high pressure piston has a piston (20) and a cylinder-bore (19); above-mentioned piston (20) is placed in the above-mentioned cylinder-bore (19) movably; the surface of above-mentioned piston (20) and/or cylinder-bore (19) are provided with groove (22), and the surface of above-mentioned piston (20) and/or cylinder-bore (19) have wear-resisting protective layer.
Above-mentioned protective layer be preferably made be inertia and/or waterproof, and (be Al specifically by similar adamantine carbon or by one or more stupaliths
2O
3, SiO
2, TiN, Si
3N
4, SiC, TiC, WC) or hard chrome or above-mentioned material in a kind of making.
The width of above-mentioned groove is preferably 120～150 μ m, and/or flute pitch is 100～2000 μ m.The spacing of groove preferably piston the high pressure side more greatly, low voltage side is littler.
Piston preferably is connected with needle, and/or piston has a needle, and/or piston and needle are made of one.In one embodiment, piston and needle are made many.In another embodiment, piston and needle are connected to each other by friction weldering, laser beam welding or electron beam welding.
Piston and cylinder-bore are preferably mutually different at the material structure that they contact with each other the place.In they contacting points, the material of piston and cylinder-bore preferably has substantially the same electrochemistry potential energy.
In the 3rd embodiment, the present invention has a control or an injection valve to combustion chambers of internal combustion engines atomizing of liquids (specifically water spray), and this control or injection valve have an above-mentioned piston, or the high pressure piston in above-mentioned cylinder assembly.Above-mentioned control or injection valve are preferably used in by public main line principle atomizing of liquids.
The present invention also comprises a kind ofly having at least one by control recited above or injection valve.
The present invention comprises that also the high pressure piston of using in above-mentioned piston or the above-mentioned cylinder assembly especially sprays into water to the firing chamber of large-sized diesel motor to combustion chambers of internal combustion engines.Spray into water and can advantageously reduce NO in the waste gas that internal-combustion engine discharges
xContent.
Piston of the present invention and have the high pressure piston in the cylinder assembly of this piston and be used for to the above-mentioned this piston of having of combustion chambers of internal combustion engines atomizing of liquids or have the control of high pressure piston of above-mentioned this cylinder assembly and the advantage of injection valve is that its degree of wear is than the remarkable reduction of prior art.This also specifically is applicable to the water spray operation to combustion chambers of internal combustion engines.Different with diesel oil, the greasy property of water is not enough, so there is not the lubrication of the groove of prior art in water.Therefore, stand much serious wearing and tearing during common control or injection valve water spray.Control or injection valve are made with case-hardened steel mostly, and regrettably, at high temperature, tap water commonly used has corrosive action to case-hardened steel, thereby makes wearing and tearing more serious.Comparatively speaking, not only be provided with the piston of the present invention of groove but also tool wear-resistant protective layer and the high pressure piston in the cylinder assembly of the present invention, its degree of wear is less, even also like this when water spray.Piston of the present invention, the high pressure piston in the cylinder assembly of the present invention and have above-mentioned this piston or have the control of the high pressure piston in the above-mentioned this cylinder assembly or injection valve is equivalent to be used for the general control of oil spout or the working life of injection valve when being used to spray water its working life.The protective layer that is applied in inertia protective layer described in the preferred embodiment and/or waterproof is particularly advantageous.In a further advantageous embodiment, adopting width is 120～500 μ m, and spacing is that the groove of 100～2000 μ m is favourable too.
Other advantageous embodiments are included in appended related right requirement and the accompanying drawing.
The accompanying drawing summary
Illustrate in greater detail the present invention below with reference to various embodiments and accompanying drawing, in the accompanying drawing:
Fig. 1 simply illustrates by the embodiment of public main line principle to the device of combustion chambers of internal combustion engines atomizing of liquids;
Fig. 2 illustrates the embodiment's of injection valve of the present invention sectional view; With
Fig. 3 illustrates the details of the valve body and the piston of injection valve shown in Figure 2.
Detailed Description Of The Invention
Fig. 1 simply illustrates according to the embodiment of public main line principle to the device of combustion chambers of internal combustion engines atomizing of liquids.The device 1 of this atomizing of liquids has a high pressure liquid-storage container 2 (for example so-called supply pipe), and it for example is called high pressure resistant lengthwise pipeline.This liquid-storage container 2 infeeds pressure by the high-pressure service pump (not shown) by pressure-resistant pipeline 7 and is about for example water of 400 liquid that cling to.By pressure-resistant pipeline 3 two identical injection apparatus of structure are connected with above-mentioned high pressure liquid-storage container 2, so as respectively to internal-combustion engine for example a cylinder of large-scale diesel engine spray into liquid.Each injection apparatus has 3 preferably by the injection valve 10.1a～c of the present invention's design, and 10.2a～4 also have a control valve 4.1, (4.2 for example control valve of European patent EP-A-0995903), throttle valve 6.1,6.2 and one second control valve 5.1,5.2 (for example solenoid valve).
The control valve 4.1,4.2 that is shown in Fig. 1 is equivalent to the disclosed control valve of EP-A-0995903.The control valve 4.1,4.2 of Fig. 1 has the control piston 4.1a and a closure member 4.1c who is arranged in figure the right and is connected with control piston 4.1a by an axle 4.1b that are arranged in the figure left side.On the stop position of atomizing of liquids not, second control valve 5.1 is closed, and acts on from the total pressure of high pressure liquid-storage container on the bi-side of control 4.1a when living through, and acts on the closure member 4.1c.In this structure, the diameter of control piston 4.1a, axle 4.1b and closure member 4.1c is complementary according to the mode that closure member 4.1c can be pushed into closing position.Second control valve 5.1 opens wide towards the reflux line 8 of atomizing of liquids, and owing to throttle valve 6.1 is opened the pressure that makes control piston 4.1 right flanks and is descended, up to the pressure that acts on the control piston left surface control piston 4.1a can be moved to closure member 4.1c when opening till.Can design the part of control piston 4.1a and/or axle 4.1b and/or axle best according to the present invention.Embodiment below in conjunction with an injection valve describes piston of the present invention in detail.
Fig. 2 illustrates an embodiment of injection valve of the present invention.This embodiment's injection valve 10 has a nozzle chuck, a high pressure piston and a nozzle tip 13 that has nozzle bore 14 that is positioned at cylinder assembly 15.High pressure piston in the cylinder assembly 15 has the valve body 12 and the piston 20 that is arranged on movably in the cylinder-bore that have cylinder-bore.In addition, injection valve 10 also has a needle 21 (this needle 21 forms in the present embodiment), one and is arranged on tappet 16 on needle seat (needle 21 and this needle seat sealing engagement when injection valve 10 cuts out) on the prolonged section of needle 21, the prolonged section that is arranged on piston 20 and pressure spring 17 (spring force of pressure spring 17 being passed to piston 20 by above-mentioned tappet 16) on piston 20.Therefore, the needle 21 that is connected with piston 20 is pushed to the needle seat, as long as the fluid pressure that is applied on the injection valve reduces, just injection valve can cut out voluntarily.
Fig. 3 is shown specifically the valve body 12 and the piston 20 of injection valve 10 shown in Figure 2.In the present embodiment, valve body 12 has a duct 18 that is used to supply with atomizing of liquids, and this duct 18 is connected with the cavity around needle 21 on the valve body 12, so, the pressure of atomizing of liquids not only acts on the piston 20, and acts on that to close the position be on needle 21 and the needle seat.If be applied to the spring force of the power Overpressure of a safety valve spring 17 on the piston 20,, needle 21 risen leave the needle seat, thereby reserve the passage of atomizing of liquids for nozzle tip 13 just piston 20 is removable by fluid pressure.Otherwise if fluid pressure is applied to the spring force that power on the piston 20 is lower than pressure spring 17, piston 20 will be pushed back by spring force, thereby pushes needle 21 to the needle seat, closes injection valve.So injection valve is directly actuated by the pressure of atomizing of liquids.
In working order down; it is obstruction wearing and tearing in the injection water specifically that the piston 20 that moves forward and backward along cylinder-bore is subjected to; in order to reduce this wearing and tearing; on surface of piston 20 and/or cylinder-bore 19 groove 22 is set, above-mentioned piston face and/or cylinder 19 have the wear-resistant protective layer of interpolation.The width of above-mentioned groove 22 can be 50～1000 μ m, is preferably 120～500 μ m, and the direction of above-mentioned groove 22 is perpendicular to the longitudinal direction of piston.Also can adopt spiral groove.In the present embodiment, flute pitch is 100～2000 μ m.In an advantageous embodiments, flute pitch is not made steady state value, but for example is complementary with the pressure that promotes piston, for example, and in the on high-tension side flute pitch of piston flute pitch greater than its low voltage side.
In a preferred embodiment, above-mentioned wear-resistant protective layer be inertia and/or waterproof.In a further advantageous embodiment, above-mentioned wear-resistant protective layer is made by similar adamantine carbon (DLC), or (is Al specifically by one or more stupaliths
2O
3, SiO
2, TiN, Si
3N
4, SiC, TiC WC) or by hard chrome makes, and perhaps contains a kind of in the above-mentioned material at above-mentioned protective layer.Piston 20 is preferably on their contacted positions with cylinder-bore 19 has different material structures respectively.Owing to this different material structure, can reduce the adhesive attraction of 20 pairs of cylinder-bore 19 of piston.More advantageously, selected manufacturing piston and adjacent members be the material separately of cylinder-bore 19 for example, and the difference of its electrochemistry potential energy is as far as possible little, for example less than 1 volt, is preferably less than 0.2 volt.High pressure piston in the cylinder assembly 15 of the piston of design like this and so design, its degree of wear reduces than prior art is remarkable, especially the occasion of water spray.
Claims (12)
1. piston that is used for water is sprayed into the high pressure piston that is positioned at cylinder assembly of the control valve of internal-combustion engine or injection valve; wherein the surface of piston (20) not only is provided with some grooves (22) but also is provided with a wear-resisting protective layer; it is characterized in that described protective layer is that protective layer waterproof and described is by similar adamantine carbon (DLC) or TiN, Si
3N
4, SiC, TiC, WC or hard chrome form or contain a kind of in the above-mentioned material in described protective layer.
2. high pressure piston that is used for water is sprayed into the cylinder assembly of the control valve of internal-combustion engine or injection valve; described high pressure piston in this cylinder assembly (15) has a piston (20) and a cylinder-bore (19); above-mentioned piston (20) is placed in the above-mentioned cylinder-bore (19) movably; wherein the surface of piston (20) and/or cylinder-bore (19) surface and/or cylinder-bore that some grooves (22) and piston (20) be set has a wear-resisting protective layer; it is characterized in that described protective layer is that protective layer waterproof and described is by similar adamantine carbon (DLC) or TiN; Si
3N
4, SiC, TiC, WC or hard chrome form or contain a kind of in the above-mentioned material in described protective layer.
3. the high pressure piston in piston according to claim 1 or the cylinder assembly according to claim 2 is characterized in that, above-mentioned recess width is that 120～500 μ m and/or above-mentioned flute pitch are 100～2000 μ m.
4. according to any described piston in the claim 1 to 3 or according to the high pressure piston in claim 2 or the 3 described cylinder assemblies, it is characterized in that, above-mentioned groove in the on high-tension side spacing of piston (20) greater than spacing in its low voltage side.
5. according to any described piston in the claim 1,3 or 4, or according to the high pressure piston in any described cylinder assembly in the claim 2～4, it is characterized in that above-mentioned piston (20) is connected with needle (21), or above-mentioned piston (20) has a needle (21).
6. according to any described piston in the claim 1,3,4 or 5, or, it is characterized in that above-mentioned piston and needle are made of one according to the high pressure piston in any described cylinder assembly in the claim 2～5.
7. according to the high pressure piston in any described cylinder assembly in the claim 2～6, it is characterized in that, on piston (20) and the contacted position of cylinder-bore (19), this piston has different material structures respectively with cylinder-bore, and/or is made by the essentially identical material of electrochemistry potential energy respectively.
8. one kind is used for control valve or the injection valve by public main line principle water-spraying to the firing chamber of internal-combustion engine, this control valve or injection valve (4.1,4.2,10,10.1a～c, 10.2a～c) have one according to any described piston (20) in the claim 1,3,4,5 or 6 or have one according to the high pressure piston in any described cylinder assembly (15) in the claim 2～7.
One kind have according to the described control valve of claim 8 or injection valve (4.1,4.2,10,10.1a～c, the internal-combustion engine of 10.2a～c).
10. according to the high pressure piston in any described cylinder assembly in any described piston (20) or the claim 2～7 in the claim 1,3,4,5 or 6 or described control valve of claim 8 or injection valve (4.1,4.2,10,10.1a～c, 10.2a～c) application is used for to the firing chamber of internal-combustion engine water spray.
11. the application according to claim 10 is characterized in that, the firing chamber of described internal-combustion engine is the firing chamber of large-sized diesel motor.
12. the application according to claim 10 is characterized in that, is in order to reduce the NO in the waste gas of being discharged by this internal-combustion engine to the firing chamber of internal-combustion engine water spray
xContent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP03405543 | 2003-07-16 | ||
| EP03405543.4 | 2003-07-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1576570A CN1576570A (en) | 2005-02-09 |
| CN100449140C true CN100449140C (en) | 2009-01-07 |
Family
ID=34203264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100634728A Expired - Fee Related CN100449140C (en) | 2003-07-16 | 2004-07-06 | Piston for a high pressure piston cylinder unit of an injection valve |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1498603B1 (en) |
| JP (1) | JP4792209B2 (en) |
| KR (1) | KR101307563B1 (en) |
| CN (1) | CN100449140C (en) |
| AT (1) | ATE340927T1 (en) |
| DE (1) | DE502004001570D1 (en) |
| DK (1) | DK1498603T3 (en) |
| PL (1) | PL1498603T3 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL1566539T3 (en) * | 2004-02-23 | 2009-05-29 | Waertsilae Nsd Schweiz Ag | Fuel injector |
| DE102006017449A1 (en) * | 2006-04-13 | 2007-10-18 | Robert Bosch Gmbh | Fuel injector with high durability and wear resistance |
| DE102007050811A1 (en) * | 2007-10-24 | 2009-04-30 | Robert Bosch Gmbh | Wear protection layer and method for its production |
| DE102015211705A1 (en) * | 2015-06-24 | 2016-12-29 | Robert Bosch Gmbh | Fuel injector with control valve |
| KR101724968B1 (en) | 2015-12-11 | 2017-04-07 | 현대자동차주식회사 | Piston pin applied eccentric center of gravity with different materials and method for manufacturing of the same |
| WO2019108495A1 (en) * | 2017-11-30 | 2019-06-06 | Cummins Inc. | Electroless nickel coating on fuel injector needle |
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| US5492573A (en) * | 1993-04-19 | 1996-02-20 | Hitachi Metals, Ltd. | High-strength stainless steel for use as material of fuel injection nozzle or needle for internal combustion engine, fuel injection nozzle made of the stainless steel |
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| WO2003004865A1 (en) * | 2001-07-07 | 2003-01-16 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
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| DE19706661A1 (en) * | 1997-02-20 | 1998-08-27 | Bosch Gmbh Robert | Fuel injection valve for internal combustion engines |
| JP4445072B2 (en) * | 1998-10-20 | 2010-04-07 | ヴェルトジィレ シュヴァイツ アクチェンゲゼルシャフト | Liquid injection device for diesel engine cylinder and diesel engine |
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| JP4607383B2 (en) * | 2001-07-30 | 2011-01-05 | いすゞ自動車株式会社 | Manufacturing method of fuel injection injector and manufacturing method of fuel injection pump |
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2004
- 2004-06-10 KR KR1020040042598A patent/KR101307563B1/en active IP Right Grant
- 2004-06-15 JP JP2004176957A patent/JP4792209B2/en not_active Expired - Fee Related
- 2004-06-17 EP EP04405372A patent/EP1498603B1/en not_active Not-in-force
- 2004-06-17 PL PL04405372T patent/PL1498603T3/en unknown
- 2004-06-17 DK DK04405372T patent/DK1498603T3/en active
- 2004-06-17 AT AT04405372T patent/ATE340927T1/en not_active IP Right Cessation
- 2004-06-17 DE DE502004001570T patent/DE502004001570D1/en active Active
- 2004-07-06 CN CNB2004100634728A patent/CN100449140C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5492573A (en) * | 1993-04-19 | 1996-02-20 | Hitachi Metals, Ltd. | High-strength stainless steel for use as material of fuel injection nozzle or needle for internal combustion engine, fuel injection nozzle made of the stainless steel |
| JPH10131828A (en) * | 1996-10-31 | 1998-05-19 | Mitsubishi Heavy Ind Ltd | Injection valve device |
| US6477940B1 (en) * | 1998-03-26 | 2002-11-12 | Mtu Moteren-Und Turbinen-Union Friedrichshafen Gmbh | High-pressure piston cylinder unit |
| EP1156209A2 (en) * | 2000-05-19 | 2001-11-21 | Siemens Aktiengesellschaft | Guiding device for high pressure hydraulic systems |
| WO2003004865A1 (en) * | 2001-07-07 | 2003-01-16 | Robert Bosch Gmbh | Fuel injection valve for internal combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1498603B1 (en) | 2006-09-27 |
| KR101307563B1 (en) | 2013-09-12 |
| DK1498603T3 (en) | 2006-11-27 |
| KR20050010481A (en) | 2005-01-27 |
| JP2005036800A (en) | 2005-02-10 |
| DE502004001570D1 (en) | 2006-11-09 |
| PL1498603T3 (en) | 2007-02-28 |
| ATE340927T1 (en) | 2006-10-15 |
| JP4792209B2 (en) | 2011-10-12 |
| EP1498603A1 (en) | 2005-01-19 |
| CN1576570A (en) | 2005-02-09 |
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