CN105339610A - Poppet valve - Google Patents
Poppet valve Download PDFInfo
- Publication number
- CN105339610A CN105339610A CN201480036387.4A CN201480036387A CN105339610A CN 105339610 A CN105339610 A CN 105339610A CN 201480036387 A CN201480036387 A CN 201480036387A CN 105339610 A CN105339610 A CN 105339610A
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- Prior art keywords
- heat
- poppet valve
- valve
- radiation
- metal
- Prior art date
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 27
- 229910052751 metal Inorganic materials 0.000 claims description 55
- 239000002184 metal Substances 0.000 claims description 55
- 238000009413 insulation Methods 0.000 claims description 20
- 238000004381 surface treatment Methods 0.000 claims description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 229910000838 Al alloy Inorganic materials 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
- 239000004411 aluminium Substances 0.000 claims description 9
- 239000010949 copper Substances 0.000 claims description 8
- 238000005240 physical vapour deposition Methods 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 230000005855 radiation Effects 0.000 abstract description 67
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000010304 firing Methods 0.000 description 28
- 239000000463 material Substances 0.000 description 22
- 239000000567 combustion gas Substances 0.000 description 20
- 230000000694 effects Effects 0.000 description 12
- 238000001816 cooling Methods 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 239000000446 fuel Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 5
- 238000002310 reflectometry Methods 0.000 description 5
- 230000037361 pathway Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003574 free electron Substances 0.000 description 2
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000004745 nonwoven fabric Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- -1 stainless steel.But Chemical class 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/20—Shapes or constructions of valve members, not provided for in preceding subgroups of this group
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/02—Selecting particular materials for valve-members or valve-seats; Valve-members or valve-seats composed of two or more materials
- F01L3/04—Coated valve members or valve-seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L3/00—Lift-valve, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces; Parts or accessories thereof
- F01L3/12—Cooling of valves
Abstract
Provided is a poppet valve which is configured so as to prevent all the three modes of heat transfer from occurring, thereby enabling maximum combustion efficiency to be achieved. A poppet valve has an umbrella section (14) integrally formed on one end side of a shaft section (12). A hollow section (19) extending along an umbrella front surface (24) is formed within the umbrella section (14). A metallic layer (17) for blocking radiation heat is formed on the ceiling surface (25) of the hollow section (19), and a heat insulating section is formed between the metallic layer (17) and the bottom surface of the hollow section (19). Among the modes of heat transfer, the conduction and convention are blocked by the heat insulating section, and the radiation is blocked by the metallic layer (17).
Description
Technical field
The present invention relates to poppet valve, this poppet valve suppresses the heat transfer from firing chamber, especially suppresses the dissipation of heat undertaken by radiation.
Background technique
In patent documentation 1, describe the poppet valve forming umbrella portion at shaft end.The poppet valve used in internal-combustion engine is taken a seat on the valve seat of cylinder cap being connected with suction pathway or exhaust pathway, makes described suction pathway or exhaust pathway opening and closing, makes engine-driving.
Usually, for internal-combustion engine, the loss of the energy produced in firing chamber is fewer, and combustion efficiency is higher.As the loss of energy, there is the cooling loss etc. caused because heat externally disperses.The heat externally dissipation via described poppet valve and Inner Wall of Combustion Chamber mostly of described firing chamber.Therefore, space is formed near surface, the umbrella portion of the poppet valve contacted with described firing chamber or its, this space is made to become vacuum or filling inert gas or packing ratio forms the little material of the material pyroconductivity of described poppet valve, form adiabatic space, suppress the dissipation (with reference to patent documentation 1) of the heat in firing chamber.
In the form of heat transmission (heat transfer), there are these three kinds of forms of heat transfer, convection current and radiation (heat emission).In heat transfer, object does not move, but conducts heat by directly contacting with each other, and convection current is by making the flowing of fluid indirectly conduct heat as medium, and under these two kinds of forms, heat is all keep the mode of thermal vibration to transmit.In contrast to this, radiation be send electromagnetic wave by the object of delivery source, the object of conveying target side absorbs this electromagnetic wave and carrys out transferring heat.When radiation, between two objects, there is no vehicular material, even if in a vacuum can transferring heat yet.
Also be occurred by these three kinds of forms of heat transfer, convection current and radiation from the firing chamber of motor to the heat transfer of poppet valve.In above-mentioned patent documentation 1, form recess in valve head face, in this recess, fill the porous material of adiabaticity, suppress the heat radiation from firing chamber.As the material of this porous material, exemplified with the nonwovens (paragraph 0036) of the heating resisting metals such as stainless steel.But, if adopt common thermoinsulation material, namely allow to block the heat transfer undertaken by the heat transfer in the heat transfer of described three kinds of forms and convection current, but radiation heat can be through, and the temperature in the firing chamber of this part cannot be avoided to reduce.In patent documentation 1, completely not about the record of radiation, do not consider and block this aspect of radiation heat.
In patent documentation 2, disclose: on the inwall of the firing chamber of motor, be covered with the thermoinsulation material (paragraph 0023) of the adiabatic porous layer formed by pottery and the surface compact layer formed by pottery.Further, utilize surface compact layer by reflect radiation heat (paragraph 0024) when fuel combustion.
At first technical paper
Patent documentation
Patent documentation 1: Japanese Unexamined Patent Publication 2012-72748
Patent documentation 2:WO2013/080389A1
Non-patent literature
Non-patent literature 1:http: //www.landinst.jp/info/faq/faq3.html
Non-patent literature 2:http: //www.fintech.co.jp/etc-data/housharitsu.htm
Summary of the invention
The problem that invention will solve
According to the research of inventor, find: the shaggy nonwovens adopting patent documentation 1 to record, comprises the reflection of the heat of radiation hardly, in addition about the pottery that patent documentation 2 is recorded, contrary with the record of patent documentation 2, there is not photothermal sufficient reflection.Such as, in non-patent literature 1 and patent documentation 2, describe the electromagnetic emissivity of metal and pottery etc., emissivity is defined by (emissivity=1-reflectivity-transmittance).It can thus be appreciated that if emissivity is low, then reflectivity is high, the emissivity of pottery is 0.4 to 0.95, and emissivity is quite high, and therefore reflectivity is quite low, and electromagnetic reflection efficiency is not enough.The emissivity of aluminium and copper is 0.05 to 0.09, and reflectivity is quite high.In the reflection undertaken by metal, the effect produced by free electron is large, and utilize the collective vibration reflection electromagnetic wave of free electron, therefore reflecting effect is good, and in addition, above-mentioned reflection has Directivity.But aluminium and these metals of copper lack heat-resisting quantity, reach in the motor of 2000 DEG C to 2500 DEG C cannot use at burning gas temperature.
In addition, in patent documentation 2, because reflect radiation heat mechanism is in the most skin section of combustion chamber side, so due to the reason of limited material that is high to the heat resisting temperature of material requirements, that can be suitable for, or the attachment of combustion residue thing and the Producing reason of oxide layer, reflection function is deteriorated.Therefore, even if by the valve head face of ceramic applications in the poppet valve of patent documentation 1, also heat radiation cannot be suppressed by photothermal reflection.
The present invention makes for based on the opinion of first document by above-mentioned the present inventor, its object is to provide a kind of poppet valve, the radiation heat from firing chamber of poppet valve reflects to this direction, firing chamber by this poppet valve, suppress the heat radiation undertaken by radiation, for a long time, stably can maintain high combustion efficiency.
For solving the means of problem
In order to reach described object, about the poppet valve of the present invention's (technological scheme 1), form in the end side in axle portion in the poppet valve in umbrella portion, be formed with the insulation being positioned at combustion chamber side and the photothermal metal layer of blocking-up being positioned at side, axle portion in described umbrella portion.
(effect) is if used the poppet valve by such Structure composing as engine valve, the combustion flame produced by the fuel combustion in firing chamber and the heat of combustion gas that produces due to burning, with the form of heat transfer, convection current and radiation, transmit from firing chamber to poppet valve direction.The heat transmitted by heat transfer and convection current in the heat of described combustion gas is at the adiabatic space of the combustion chamber side of the valve head in the umbrella portion of valve body or be blocked in the adiabatic zone (insulation) being filled in this adiabatic space by thermoinsulation material.And the radiation heat that heat is passed as electromagnetic wave is by adiabatic zone, Metal Contact glossiness with tool.
The heat transmitted by heat transfer and convection current is blocked in described insulation, do not arrive described metal, therefore, significantly reduce with the temperature of the combustion gas of this Metal Contact, even also can not deterioration be there is in the metal lacking heat-resisting quantity, radiation heat can be reflected to direction, firing chamber, and radiation heat can not diffuse through valve body, but radiation heat is stayed in firing chamber, thus, by preventing the cooling of the heat of the combustion gas caused by valve, combustion efficiency can be improved.Especially, the heat that described metal receives be combustion gas via insulation heat, be in other words based on the heat of the radiation that cannot block in insulation, the heat of combustion gas is not directly passed to described metal, therefore, also can select the material that heat resisting temperature is low.In addition, by making reflect radiation heat mechanism be present in valve inside, thus can prevent due to the pollution such as attachment of combustion residue thing or the generation of oxide layer and the decline of the reflectivity caused.In addition, metal of the present invention also comprises metal alloy.
Metal layer of the present invention needs to have radiation heat blocking-up property.The metal with radiation heat blocking-up property has bright side or minute surface usually, but, even if do not have this bright side or minute surface, as long as have radiation heat blocking-up property, also can use as metal of the present invention.When not having the metal of radiation heat blocking-up property, effects on surface carries out polishing fine finishing or minute surface fine finishing blocks property to give radiation heat, also can use as metal of the present invention.Especially, suppose that the temperature of the combustion gas produced in firing chamber is 2500 DEG C, according to Wien's displacement law, the wavelength of the radiation produced by the heat of these combustion gas is 1.0 μm (wavelength at 1500 DEG C is 1.6 μm), the reflectivity of metal in described wavelength region is high, and therefore radiation heat blocking characteristics uprises.Therefore, the metal that can use in the present invention has the radiation heat more much bigger than pottery etc. and blocks property.
Technological scheme 2 is configured to: in the poppet valve that technological scheme 1 is recorded, the hollow portion extended along surface, umbrella portion is formed in described umbrella portion, formed at the end face of this hollow portion and block photothermal metal layer, between the bottom surface of described metal layer and described hollow portion, form insulation.
(effect), in the poppet valve by such Structure composing, is filled with the thermoinsulation material of gas or low thermal conductivity material at hollow portion, or described hollow portion is maintained vacuum.By suitably selecting the condition of hollow portion, thus most suitable heat barrier effect can be obtained.
Technological scheme 3 is configured to: in the poppet valve that technological scheme 1 is recorded, and is formed and blocks photothermal metal layer, and form the surface-treated layer of adiabaticity in the combustion chamber side of the photothermal metal layer of this blocking-up in the bottom surface in described umbrella portion.
(effect) in the poppet valve by such Structure composing, owing to not forming hollow portion, therefore, it is possible to improve the manufacturing of valve.
Technological scheme 4 is configured to: in the poppet valve that technological scheme 1 is recorded, metal is selected from aluminium, copper and aluminum alloy.As the metal beyond the aluminium of formation aluminum alloy, there are copper, manganese, silicon, magnesium, zinc and nickel etc.
(effect) aluminium and weight of copper are relatively lighter, and reflect radiation heat efficiency is high, therefore, is preferred material.Aluminum alloy also has reflect radiation heat energy, can improve fuel efficiency.
Technological scheme 5 is configured to: in the poppet valve that technological scheme 1 or 2 is recorded, metal is foil-like or sheet.Aluminium foil and Copper Foil himself have gloss usually, by being attached at the combustion chamber side of valve head via adiabatic zone with being kept intact, reflect radiation heat can be utilized to prevent heat dispersing externally, and the fuel consumption that can contribute to improving along with combustion efficiency reduce.In addition, identical with the situation by described metal forming being sheet, by being located at assigned position to use, thus can reflected radiation heat.
Technological scheme 6 is configured to: in the poppet valve that technological scheme 1 is recorded, the tunicle that metal layer is surface treatment by selecting from physical vapor deposition (PVD), spraying plating and coating and is formed.Metal layer of the present invention can be existing paper tinsel or sheet, and described surface treatment also can be utilized to form metal layer, by such surface treatment, can form the metal layer that radiation heat blocking-up property is high.
The effect of invention
According to poppet valve of the present invention, effectively block the heat transmission of the heat transfer of the heat of combustion flame in firing chamber and combustion gas, convection current and these all forms of radiation, prevent the heat produced in firing chamber from externally dispersing, thereby, it is possible to alleviate the loss owing to cooling the combustion efficiency caused.Even if the heat-resisting quantity forming the metal of the high metal layer of radiation heat blocking-up property is not enough, but because the heat transmitted because of heat transfer and convection current in the heat of combustion gas is removed in insulation, the heat transmitted because of radiation is only had to arrive described metal layer, so also there is metal degradation hardly.
Accompanying drawing explanation
Fig. 1 is the longitudinal section of the poppet valve of the first embodiment of the present invention.
Fig. 2 is the A-A line amplification view of Fig. 1.
Fig. 3 is the longitudinal section of the poppet valve of the second embodiment of the present invention.
Fig. 4 is the longitudinal section of the poppet valve of the third embodiment of the present invention.
Embodiment
Next, based on embodiment, embodiments of the present invention are described.
Fig. 1 and Fig. 2 represents the hollow poppet valve of the internal-combustion engine of the first embodiment of the present invention.
In FIG, reference character 10 is heat resisting alloy poppet valves, the end side of this poppet valve in the valve shaft portion 12 of straight extension becomes the fillet part 13 of large R shape gradually via external diameter and forms valve umbrella portion 14, arranges the face 16 of conical by its shape in the periphery in valve umbrella portion 14.Form umbrella portion shell 14a in the end side in axle portion 12, constitute housing department 11.
Preferably, at the end face 14b of 24 sides, surface, umbrella portion in valve umbrella portion 14, spraying plating etc. is utilized to form reflect radiation heat face (blocking photothermal metal layer) 17 and engage, or will be shaped to the metal bond of sheet by methods such as welding, described reflect radiation heat face is formed by the metal of the foil-like or sheet that define minute surface.As the metal that can use, there are aluminium or copper, comprise the alloy of these metals in addition, especially the alloy of aluminium.
Usually, the metal due to foil-like has minute surface and has radiation heat and block property, so keep it to use as former state, but there is sheet or the metal that formed by surface treatment does not have the situation of enough radiation heat blocking-up property.At this moment, need to carry out process and make surface have gloss, improve radiation heat blocking-up property.As an example of the gloss finish of metal, there is the grinding of metal surface.
Next, at the end face 14b in the described valve umbrella portion 14 defining reflect radiation heat face 17, lid 18 is installed.This lid 18 has circular plate shape, this circular plate shape has and is bent upward by peripheral portion and the upwards kink 18a formed, the upper surface of the interior side of this external lid 18, is formed the flank 18b of the arc-shaped of the annulus quartering of ring-type by one-body molded or welding.When by described in this lid 18 upwards kink 18a by welding etc. be fixed on the end face 14b in described valve umbrella portion 14 time, described each flank 18b supports the end face 14b in described valve umbrella portion 14 via described reflect radiation heat face 17.Hollow portion 19 is formed between the upper surface and the end face 14b in valve umbrella portion 14 of described lid 18.By making to become vacuum in the space of formation, thus breaking off the conduction of the heat from combustion chamber side, playing a role as adiabatic space.In addition, also can play a role as adiabatic space by filling the gas such as air or argon gas within this space.In the case of figure 1, the upper surface of described lid 18 becomes the bottom surface 25 of described hollow portion.
In addition, reference character 2 in Fig. 1 is cylinder caps, and reference character 6 is the exhaust passageways extended from firing chamber 4, at the opening peripheral portion of exhaust passageway 6 to firing chamber 4 opening, be provided with circular valve seat 8, described valve seat 8 possesses the taper that can abut with the face 16 of valve 10.Reference character 3 is the valve inserting holes being arranged at cylinder cap 2, and valve inserting hole 3 is made up of the valve guide portion 3a of the drum of axle portion 12 sliding contact with valve 10.Reference character 9 is the valve springs exerted a force to valve closing direction (the upper direction of Fig. 1) by valve 10, and reference character 12c is the opening slot of the end being arranged at valve shaft portion 12.In axle portion 12, be formed with longitudinal hollow portion 21, this hollow portion 21 makes described hollow portion (insulation) 19 be communicated with the lower surface of described axle head parts 12b.
In addition, be made up of refractory steel as the housing department 11 at the position be exposed in the high-temperature gas of firing chamber 4 and exhaust passageway 6 and lid 18, in contrast to this, although require that the axle head parts 12b that mechanical strength does not require housing department 11 and the such heat resistance of lid 18 is made up of common steel.
When fuel burns in the firing chamber 4 of the hollow poppet valve 10 formed like this, produce the heat of the combustion gas of high temperature, the heat of these combustion gas, by the lid 18 of described poppet valve 10, arrives described hollow portion (insulation) 19.Heat as the heat of combustion gas transmits heat transfer among the heat transfer of form, convection current and radiation and convection current is blocked by this insulation 19, and the heat of combustion gas can not transmit from described reflect radiation heat face 17 to direction, valve umbrella portion 14.Radiation heat in the heat of combustion gas is reflected by the reflect radiation heat face 17 of aluminum etc., by lid 18, gets back in firing chamber 4.Therefore, in the poppet valve 10 of the present embodiment, it is suppressed that heat as the heat of combustion gas transmits the heat transfer of form, convection current and radiation, the quantitative change that the energy produced by the burning of fuel is externally lost via valve body as heat few (cooling loss diminishes).
In the present embodiment, as the material in reflect radiation heat face, can use aluminium, copper or aluminum alloy, from the pottery that patent documentation 2 is recorded different, most reflect radiation heat can make it to return in firing chamber by these materials.
Fig. 3 represents the poppet valve of the internal-combustion engine of the second embodiment of the present invention.The hollow poppet valve 10A of the second embodiment is the variation of described first embodiment, is accompanied by same reference numerals and omits the description for the parts identical with the first embodiment.In a second embodiment, spherical shape (dome-shaped) space and hollow portion 19 ' is formed between end face 14b ' and the bottom surface 25 ' of discoid lid 18 ', this hollow portion 19 ' except on the inner peripheral surface of lower end periphery cover be formed with reflect radiation heat face 17 ', be fitted together to described discoid lid 18 ' in described hollow portion 19 ' lower end.Path hollow portion S is formed upward from the top a little in the described reflect radiation heat face 17 ' in axle portion 12, the cooling material 23 (such as sodium metal, melting point be about 98 DEG C) higher than the mother metal pyroconductivity of engine valve and inert gas jointly fill in this path hollow portion S.And, stepped part 22 is defined in this path hollow portion S, therefore, cooling material 23 in path hollow portion S moves along the vertical direction due to the inertial force acted on during valve 10A on-off action, now, near stepped part 22, produce turbulent flow, cooling material 23 is stirred, improves the endothermic effect (thermal conductivity) in valve shaft portion 12.By blocking the heat of combustion gas of combustion chamber side, heat can not the dissipation via valve, and the effect produced due to the heat absorption in valve shaft portion, can reduce the heat resisting temperature required by material.
Fig. 4 represents the poppet valve of the internal-combustion engine of the third embodiment of the present invention.The poppet valve 10B of the 3rd embodiment is the variation of described first embodiment, is accompanied by same reference numerals and omits the description for the parts identical with the first embodiment.In the third embodiment, at side, the firing chamber 4 one-body molded umbrella portion 14B of solid shape axle portion 12B, in the present embodiment, hollow portion is not formed.In the bottom surface 15 of the umbrella portion 14B of described valve 10B, the mode do not exposed with two ends forms reflect radiation heat face 17 "; in described reflect radiation heat face 17 " surface, to form pyroconductivity be the covering part of the surface treatment heat insulation layer 18c of below 3W/mK or pyroconductivity is the covering part of the low thermal conductivity material of the tabular of below 3W/mK.The surface treatment heat insulation layer 18c formed has the effect identical with the adiabatic space of the hollow portion 19 of the first embodiment, and the heat of the combustion gas of the high temperature produced in firing chamber arrives reflect radiation heat face 17 by the surface treatment heat insulation layer 18c of described poppet valve 10B ".Transmit heat transfer among the heat transfer of form, convection current and radiation and convection current is blocked by the surface treatment heat insulation layer 18c of this low-thermal conductivity at the heat of the heat as combustion gas, and radiation is by described reflect radiation heat face 17 " reflected in firing chamber 4.Now, reflect radiation heat face 17 " surrounded by the bottom surface 15 of umbrella portion 14B and surface treatment heat insulation layer 18c, be not exposed in gas atmosphere, therefore, aluminium etc. also can as described reflect radiation heat face 17 without the metal of heat resistance " materials'use.Therefore, in the poppet valve 10B of the present embodiment, it is suppressed that heat as the heat of combustion gas transmits the heat transfer of form, convection current and radiation, the quantitative change that the energy produced by the burning of fuel is externally lost via valve body as heat few (cooling loss diminishes).About the formation of the surface treatment heat insulation layer 18c of low-thermal conductivity, atmospheric plasma injection etc. is utilized to cover.
The explanation of reference character
2 cylinder caps
3 valve inserting holes
3a valve guide portion
4 firing chambers
6 exhaust passageways
8 valve seats
9 valve springs
10,10A, 10B poppet valve
11,11A housing department
12 axle portions
12b axle head parts
12c opening slot
13 fillet parts
14,14B umbrella portion
14a umbrella portion shell
14b end face
15 bottom surfaces
16 faces
17,17 ', 17 " reflect radiation heat face (blocking photothermal metal layer)
18,18 ' lid
18a kink
18b arc-shaped flank
18c surface treatment heat insulation layer
19,19 ' hollow portion (insulation, adiabatic space)
21 hollow portions
22 stepped part
23 cooling materials
24,24 ' surface, umbrella portion
25,25 ' bottom surface.
Claims (6)
1. a poppet valve, forms umbrella portion in the end side in axle portion, and the feature of described poppet valve is, in described umbrella portion, is formed and is positioned at the insulation of combustion chamber side and is positioned at the photothermal metal layer of blocking-up of side, axle portion.
2. poppet valve according to claim 1, it is characterized in that, in described umbrella portion, form the hollow portion extended along surface, umbrella portion, formed at the end face of described hollow portion and block photothermal metal layer, between described metal layer and the bottom surface of described hollow portion, form insulation.
3. poppet valve according to claim 1, is characterized in that, is formed and blocks photothermal metal layer, form the surface-treated layer of adiabaticity in the combustion chamber side of the photothermal metal layer of described blocking-up in the bottom surface in described umbrella portion.
4. the poppet valve according to any one of claims 1 to 3, is characterized in that, metal is selected from aluminium, copper and aluminum alloy.
5. the poppet valve according to any one of Claims 1 to 4, is characterized in that, metal is foil-like or sheet.
6. poppet valve according to claim 1 and 2, is characterized in that, metal layer is surface treatment by selecting from physical vapor deposition (PVD), spraying plating and coating and the tunicle formed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2014/053156 WO2015121920A1 (en) | 2014-02-12 | 2014-02-12 | Poppet valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105339610A true CN105339610A (en) | 2016-02-17 |
Family
ID=53799690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480036387.4A Pending CN105339610A (en) | 2014-02-12 | 2014-02-12 | Poppet valve |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20160348546A1 (en) |
| EP (1) | EP3106634A4 (en) |
| JP (1) | JPWO2015121920A1 (en) |
| KR (1) | KR101661497B1 (en) |
| CN (1) | CN105339610A (en) |
| TW (1) | TW201540938A (en) |
| WO (1) | WO2015121920A1 (en) |
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| DE102014202021A1 (en) | 2014-02-05 | 2015-08-06 | Mahle International Gmbh | Method for measuring a wall thickness of hollow valves |
| US11022027B2 (en) * | 2016-11-18 | 2021-06-01 | Honda Motor Co., Ltd. | Internal combustion engine with reduced engine knocking |
| GB2568975A (en) * | 2017-10-30 | 2019-06-05 | Eaton Srl | Poppet valve |
| CN110914520B (en) | 2018-03-20 | 2021-11-16 | 日锻汽门株式会社 | Hollow lift valve for exhaust |
| JP7190506B2 (en) | 2018-11-12 | 2022-12-15 | 株式会社Nittan | Manufacturing method of engine poppet valve |
| US10787939B1 (en) | 2019-04-01 | 2020-09-29 | Cyclazoom, LLC | Poppet valve for internal combustion engine |
| CN115697584A (en) | 2020-03-30 | 2023-02-03 | 日锻株式会社 | Method for manufacturing poppet valve of engine |
| US11506091B2 (en) | 2021-03-03 | 2022-11-22 | Cyclazoom, LLC | Poppet valve and internal combustion piston engine head including same |
| US11933204B2 (en) * | 2022-06-23 | 2024-03-19 | Caterpillar Inc. | Systems and methods for thermal barrier coatings to modify engine component thermal characteristics |
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- 2014-02-12 KR KR1020157035623A patent/KR101661497B1/en active IP Right Grant
- 2014-02-12 EP EP14882206.7A patent/EP3106634A4/en not_active Withdrawn
- 2014-02-12 WO PCT/JP2014/053156 patent/WO2015121920A1/en active Application Filing
- 2014-02-12 JP JP2015562583A patent/JPWO2015121920A1/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| KR101661497B1 (en) | 2016-09-30 |
| EP3106634A4 (en) | 2017-11-29 |
| KR20160085213A (en) | 2016-07-15 |
| JPWO2015121920A1 (en) | 2017-03-30 |
| EP3106634A1 (en) | 2016-12-21 |
| US20160348546A1 (en) | 2016-12-01 |
| TW201540938A (en) | 2015-11-01 |
| WO2015121920A1 (en) | 2015-08-20 |
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Application publication date: 20160217 |