CN206129415U - Thermal -insulated membrane structure of combustion chamber - Google Patents
Thermal -insulated membrane structure of combustion chamber Download PDFInfo
- Publication number
- CN206129415U CN206129415U CN201620749593.6U CN201620749593U CN206129415U CN 206129415 U CN206129415 U CN 206129415U CN 201620749593 U CN201620749593 U CN 201620749593U CN 206129415 U CN206129415 U CN 206129415U
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- China
- Prior art keywords
- temperature
- insulation layer
- heat insulation
- combustion chamber
- heat
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 56
- 239000012528 membrane Substances 0.000 title claims abstract description 12
- 238000009413 insulation Methods 0.000 claims abstract description 38
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 238000002955 isolation Methods 0.000 claims description 19
- 239000011148 porous material Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910010293 ceramic material Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000008199 coating composition Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 37
- 239000010408 film Substances 0.000 description 21
- 239000000463 material Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000000740 bleeding effect Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910017083 AlN Inorganic materials 0.000 description 1
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 1
- 229910052582 BN Inorganic materials 0.000 description 1
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model provides a thermal -insulated membrane structure of combustion chamber. Should thermal -insulated membrane structure include, by setting up on burner housing's surface, be used for the heat insulation layer that insulates against heat, and form on the surface of heat insulation layer, thermal -insulated membrane that the temperature -control coating that is used for carrying on temperature regulation constitutes, the thickness of temperature -control coating is less than the thickness of heat insulation layer. Based on this structure, when guaranteeing the high heat -insulating property of chamber wall, can improve the temperature tracking performance of combustion chamber wall.
Description
Technical field
This utility model is related to the thermal isolation film of the combustor of internal combustion engine, particularly combustor.
Background technology
Generally, in the combustor of internal combustion engine, in order to prevent the heat produced by aflame gas by chamber wall
Outside is leaked into, and thermal isolation film is formed with the internal face of combustor.As thermal isolation film, thermal conductivity ratio combustor is typically adopted
The base material of wall is low, and be internally formed the adiabator of a large amount of bubbles.
In recent years, in order to further improve the thermal efficiency of electromotor, it is desirable to which combustion chamber wall surface temperature tracks combustion chamber gases
Temperature.Its reason is, in combustor, heat=pyroconductivity that combustion chamber gases are transmitted to combustion chamber wall surface × (combustor gas
Temperature-combustion chamber wall surface temperature).
Therefore, the heat loss of combustion chamber gases depends not only on pyroconductivity, additionally depends on chamber gas temperature with combustion
Burn the temperature difference between the wall surface temperature of room.That is, in order to reduce heat loss, the pyroconductivity not only made by chamber wall is low, and
The temperature difference between chamber gas temperature and combustion chamber wall surface temperature is also reduced.
If additionally, fall is less after combustion chamber wall surface temperature rises in combustion stroke, so that arriving air inlet
If after stroke, temperature is also high, air inlet gas can be heated and cause intake efficiency to reduce, the problems such as NOx discharge increases.
Accordingly, as chamber wall, with sufficiently low pyroconductivity guaranteeing while high thermal insulation, it is also desirable to which thermal capacity is enough
It is low, to realize temperature tracking performance.
However, existing adiabator is more difficult while realizing low-thermal conductivity and low heat capacity.For example, such as showing in Fig. 4
Have as shown in technology example, generally, chamber gas temperature is drastically gone up from steady temperature because of ignition in combustion stroke
Decline to a great extent after being raised to maximum temperature, drop sharply to exhaust stroke stage it is identical with cooling water temperature, and behind
Low temperature state is always maintained in induction stroke, temperature is substantially increased steady temperature into after compression stroke, is shown larger
Fluctuation characteristic.
In this regard, combustion chamber wall surface temperature in combustion stroke from steady temperature rise to maximum temperature by a small margin after it is slow
Decline, it is still very little up to exhaust stroke thereafter, induction stroke and compression stroke fall, always above steady temperature,
The less characteristic of fluctuating is shown, chamber gas temperature is not tracked completely.Thus, in combustion stroke, heat loss is larger；
In the intake stroke, air inlet gas is heated, and easily causes the situation of abnormal combustion to occur because of temperature rising.
Utility model content
For above-mentioned technical problem, the purpose of this utility model is, there is provided one kind not only can ensure that high thermal insulation but also energy
Improve the heat-insulated membrane structure of the combustor of temperature tracking performance.
Used as the technical scheme for solving above-mentioned technical problem, this utility model provides a kind of heat-insulated membrane structure of combustor.
The heat-insulated membrane structure of the combustor is characterised by：Including by being arranged on the surface of Inner Wall of Combustion Chamber, for heat-insulated heat insulation layer；
And it is formed in the surface of the heat insulation layer, the thermal isolation film for carrying out thermoregulator temperature-control coating composition, the thickness of the temperature-control coating
Thickness of the degree less than the heat insulation layer, the heat insulation layer is with 0.11 μm～1 μm of thickness；The temperature-control coating has 0.001 μm
～0.1 μm of thickness.Based on the structure, as heat insulation layer has enough thickness, it is possible to guaranteeing the indoor heat that burns
Be difficult to leak into burning outdoor, due to the thickness of temperature-control coating it is sufficiently thin, it is possible to further reduce thermal capacity, improve temperature with
Track performance.
In addition, in the heat-insulated membrane structure of above-mentioned combustor of the present utility model, preferably, the heat insulation layer adopts pore
The ceramic material of its internal pore structure of holding one's breath is all present in, the temperature-control coating is the film formed by carbon or metal.Based on this
Structure, while being prevented from gas intrusion, moreover it is possible to be smoothly formed the film of temperature-control coating on the surface of heat insulation layer.
Description of the drawings
Fig. 1 is the structural representation for representing the primary structure for employing internal combustion engine of the present utility model.
Fig. 2 is the schematic diagram of the heat-insulated membrane structure for representing embodiment of the present utility model.
Fig. 3 is the curve chart of the temperature tracking characteristics for representing the thermal isolation film in Fig. 2.
Fig. 4 is the curve chart of of the temperature tracking characteristics of the heat insulation layer for representing prior art.
Specific embodiment
Hereinafter, referring to the drawings embodiment of the present utility model is illustrated.
In present embodiment, carry out to structure of the present utility model to be applied to the example of combustor of quartastroke engine
Explanation.
Fig. 1 illustrates the primary structure of the internal combustion engine 1 involved by present embodiment, as shown in figure 1, internal combustion engine 1 possesses cylinder
Body 9 and the cylinder head 10 being configured in above the cylinder block 9.In cylinder head 10, air inlet side is provided with air intake duct 11；Exhaust side is provided with row
Air flue 12, is provided with spark plug 13, is provided with intake valve 14 in air intake duct 11 between air intake duct 11 and exhaust duct 12；Exhaust duct 12
Air bleeding valve 15 is provided with inside.The piston 17 moved back and forth in the cylinder block 9 is configured with cylinder block 9.By cylinder head 10
Bottom surface, the side wall of cylinder block 9 and piston 17 top surface surround space constitute combustor 18.
Internal combustion engine 1 repeats the induction stroke in mixed gas importing combustor 18, the pressure for compressing mixed gas
Contracting stroke, the combustion stroke for making mixed gas burning and exhaust stroke this four actions that combustion chamber gases are discharged, so that
Piston 17 moves back and forth.As shown in figure 4, in combustion stroke, mixed gas burning expansion is made using the igniting of spark plug 13,
And piston 17 is pressed onto into lower dead center, the temperature of the gas (hereinafter referred to as " combustion chamber gases ") in combustor 18 is from steady temperature urgency
Play declines to a great extent after rising to maximum temperature；In exhaust stroke, piston 17 moves upward and combustion chamber gases is pressed onto combustion
The outside of room 18 is burnt, thus, chamber gas temperature declines towards steady temperature；In induction stroke and compression stroke degree, by
It is directed in combustor 18 in outside air, so, chamber gas temperature falls below the stable state temperature of combustor 18
Degree.
As chamber wall, it is desirable to while heat-insulating property is able to ensure that, also with temperature tracking performance.Therefore, originally
In embodiment, as shown in figure 1, constituting the bottom surface of cylinder head 10 of chamber wall, the side wall of cylinder block 9, piston 17
The surface of the bottom surface of top surface, the bottom surface of intake valve 14 and air bleeding valve 15 is respectively formed with thermal isolation film 19.
Fig. 2 is by the schematic diagram of the section enlarged representation of thermal isolation film 19.As shown in Fig. 2 thermal isolation film 19 by heat insulation layer 19a and
Temperature-control coating 19b is constituted.Heat insulation layer 19a is formed in the surface (surface of chamber wall) of the inwall of combustor 18, temperature-control coating 19b shapes
Into on the surface of heat insulation layer 19a.
Heat insulation layer 19a is to not allow the heat that combustion chamber gases are produced in combustion stroke to be let out via the wall of combustor 18
Drain to outside and arrange, be made up of the low material of the pyroconductivity with high thermal insulation.In the surface shape of heat insulation layer 19a
Into the direct temperature-control coating 19b contacted with combustion chamber gases be to adjust combustion chamber wall surface temperature to track combustion chamber gases temperature
Spend and arrange, be made up of the low material of the sensitive thermal capacity of temperature-responsive.
Specifically, thermal isolation film 19 is configured to, and the pyroconductivity of the thermal conductivity ratio temperature-control coating 19b of heat insulation layer 19a is low,
The thermal capacity of the ratio of heat capacities heat insulation layer 19a of temperature-control coating 19b is low.Preferably, heat insulation layer 19a adopt pyroconductivity 1w/mk with
Under；Material of the thermal capacity in more than 11kJ/K；, using pyroconductivity in more than 1.1w/mk, thermal capacity is in 10kJ/K for temperature-control coating 19b
Following material.
In addition, in order that heat is difficult to be delivered to outside the wall of combustor 18, therefore, to assure that heat insulation layer 19a has certain thickness
Degree, meanwhile, chamber gas temperature is tracked in order to reduce thermal capacity, need to make the thinner thickness of temperature-control coating 19b.Therefore, originally
In embodiment, the thickness of temperature-control coating 19b is less than the thickness of heat insulation layer 19a.Preferably, the thickness of heat insulation layer 19a is 0.11 μm
～1 μm；The thickness of temperature-control coating 19b is 0.001 μm～0.1 μm.
As constitute heat insulation layer 19a material, it is for instance possible to use zirconium oxide, aluminium oxide, silicon nitride, titanium dioxide, two
The porous material that the ceramic material of silicon oxide, aluminium nitride, boron nitride, ferrite etc. is constituted.And, preferably, heat insulation layer 19a
Its internal pore structure of holding one's breath is all present in using pore.In such manner, it is possible to while preventing gas from invading, it is easy in heat insulation layer
The surface of 19a is smoothly formed the film of temperature-control coating 19b.
Temperature-control coating 19b is e.g. by using the methods such as sputtering, evaporation, thermal spraying by fusing point high carbon, metal in heat insulation layer
The surface of 19a forms thin film and constitutes.
Thus, constituted by being combined with heat insulation layer 19a and temperature-control coating 19b with different pyroconductivities and thermal capacity every
Hotting mask 19, can improve the temperature tracking performance to combustion chamber gases while heat-insulating property is guaranteed.Fig. 3 is to represent burning
One of the curve of the temperature characterisitic of combustion chamber gases and combustion chamber wall surface (19 surface of thermal isolation film) in room 18.Divide in Fig. 3
Do not illustrate, from combustion stroke to exhaust stroke till (crank shaft angle：0 °～360 °) during, chamber gas temperature GT, combustion
Be only formed with combustion chamber wall surface temperature DT in the case of heat insulation layer 19a on the inwall for burning room 18, on the inwall of combustor 18
Combustion chamber wall surface temperature ST being formed with the case of thermal isolation film 19.
As shown in figure 3, in combustion stroke (crank shaft angle：0 °～180 °) in, after ignition, chamber gas temperature GT
Decline to a great extent after maximum temperature GTm is sharply risen to from steady temperature；It is only formed with the feelings of heat insulation layer 19a on Inner Wall of Combustion Chamber
Combustion chamber wall surface temperature DT under condition lentamente declines after rising to maximum temperature DTm by a small margin from steady temperature, with burning
The difference of room gas temperature GT, i.e. (GT-DT) and (GTm-DTm) are larger；The situation of thermal isolation film 19 is formed with Inner Wall of Combustion Chamber
Under combustion chamber wall surface temperature ST sharply rise to maximum temperature STm from steady temperature after decline to a great extent, with combustion chamber gases temperature
Degree GT is compared, and the temperature difference (GT-ST) is less, especially the difference (GTm-STm) of both maximum temperatures essentially 0.It can be seen that, in burning
In stroke, in the case of being provided with thermal isolation film 19, combustion chamber wall surface temperature ST relative combustion room gas temperature GT, temperature tracing property
Can significantly improve.
In addition, in exhaust stroke (crank shaft angle：180 °～360 °) in, chamber gas temperature GT be reduced to steady temperature with
Under, and the fall very little of combustion chamber wall surface temperature DT in the case of being only provided with heat insulation layer 19a, significantly larger than combustor
Gas temperature GT, by contrast, is provided with combustion chamber wall surface temperature ST in the case of thermal isolation film 19 and declines to a great extent less than steady
State temperature.It can be seen that, in exhaust stroke, in the case of being provided with thermal isolation film 19, due to combustion chamber wall surface temperature it is relatively low, so energy
Enough prevent from causing the situation of abnormal combustion to occur because gas is heated.
In present embodiment, to whole inwall (bottom surface of cylinder head 10, the side wall of cylinder block 9, work in combustor 18
The bottom surface of the top surface, the bottom surface of intake valve 14 and air bleeding valve 15 of plug 17) surface be provided with the example of thermal isolation film 19 and said
It is bright, but it is not limited to this, it is also possible to thermal isolation film 19 is set on the surface of a part of inwall of combustor 18 only.
In present embodiment, said in case of the combustor 18 to quartastroke engine arranges thermal isolation film 19
It is bright, but this is not limited to, this utility model is applied to the combustor of various electromotors.
Claims (2)
1. the heat-insulated membrane structure of a kind of combustor, it is characterised in that：
Including by being arranged on the surface of Inner Wall of Combustion Chamber, for heat-insulated heat insulation layer；And be formed in the surface of the heat insulation layer, use
In the thermal isolation film for carrying out thermoregulator temperature-control coating composition,
Thickness of the thickness of the temperature-control coating less than the heat insulation layer,
The heat insulation layer is with 0.11 μm～1 μm of thickness；The temperature-control coating is with 0.001 μm～0.1 μm of thickness.
2. the heat-insulated membrane structure of combustor as claimed in claim 1, it is characterised in that：
The heat insulation layer is all present in the ceramic material of its internal pore structure of holding one's breath using pore,
The temperature-control coating is the film formed by carbon or metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620749593.6U CN206129415U (en) | 2016-07-15 | 2016-07-15 | Thermal -insulated membrane structure of combustion chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620749593.6U CN206129415U (en) | 2016-07-15 | 2016-07-15 | Thermal -insulated membrane structure of combustion chamber |
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| Publication Number | Publication Date |
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| CN206129415U true CN206129415U (en) | 2017-04-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966112A (en) * | 2018-10-01 | 2020-04-07 | 丰田自动车株式会社 | Internal combustion engine |
-
2016
- 2016-07-15 CN CN201620749593.6U patent/CN206129415U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110966112A (en) * | 2018-10-01 | 2020-04-07 | 丰田自动车株式会社 | Internal combustion engine |
| CN110966112B (en) * | 2018-10-01 | 2022-03-15 | 丰田自动车株式会社 | Internal combustion engine |
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