JPS59153962A - Intake heating ptc heater of engine - Google Patents
Intake heating ptc heater of engineInfo
- Publication number
- JPS59153962A JPS59153962A JP58028016A JP2801683A JPS59153962A JP S59153962 A JPS59153962 A JP S59153962A JP 58028016 A JP58028016 A JP 58028016A JP 2801683 A JP2801683 A JP 2801683A JP S59153962 A JPS59153962 A JP S59153962A
- Authority
- JP
- Japan
- Prior art keywords
- electrode layer
- layer
- aluminum electrode
- engine
- ptc heater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 24
- 239000011148 porous material Substances 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000010407 anodic oxide Substances 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims 1
- 238000001704 evaporation Methods 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 13
- 238000007789 sealing Methods 0.000 abstract description 8
- 238000005480 shot peening Methods 0.000 abstract description 5
- 230000001590 oxidative effect Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 2
- 238000000034 method Methods 0.000 abstract 5
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000007743 anodising Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 241000123069 Ocyurus chrysurus Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/02—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating
- F02M31/12—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for heating electrically
- F02M31/135—Fuel-air mixture
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Resistance Heating (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はエンジンの吸気加熱用ＰＴＣヒ−ＩＦに関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a PTC heat-IF for heating intake air of an engine.
一般にエンジンの吸気加熱用ＰＴＣヒータは、エンジン
の吸気通路内に設置され、該通路内を通過するガソリン
を加熱気化するためのものである。Generally, a PTC heater for heating intake air of an engine is installed in an intake passage of an engine, and is used to heat and vaporize gasoline passing through the passage.
ところでいわゆるノ〜イオクタン価のガソリンに（よ鉛
が含まれており、従来、このようなガソリンを使用する
とＰＴＣヒータの電極材であるアルミ溶射材が、上記ガ
ソリン中ないしは排気環流ガス中の鉛の一ロゲン化合物
（ＰａＣｌ２）により腐食されやすいという問題があっ
た。By the way, gasoline with a so-called octane number contains lead (lead), and conventionally, when such gasoline is used, the aluminum thermal spray material that is the electrode material of the PTC heater will remove the lead in the gasoline or exhaust gas recirculation. There was a problem in that it was easily corroded by monologous compounds (PaCl2).
本発明者は上記腐食を防止せんと鋭意研究した結果、上
記電極層にはアルミを溶射した際に微細な気孔が多数生
成しており、この気孔の部分から上記腐食が急速番こ進
行していること、及び上記腐食を防止せんとしてアルミ
電極層表面に陽極酸化皮膜を形成しようとすると、今度
は上記気孔から陽極酸化が内部に進行して電極層全体が
Ａｌｌ ２０ ｓになってしまい、電極としての機能が
低下してしまうこと、を見い出して本発明を児成したも
のである。即ち本発明は、アルミ電極層の多孔質表面に
ショットピーニングによる封孔処理を施し、かつ該封孔
されたアルミ電極層の表面に陽極酸化皮膜を形成し、さ
らに該皮膜に蒸気処理による封孔処理を施すことにより
、アルミ電極層の電極及び熱伝導材としての機能を損な
うことなく、耐食性を大きく向上できるエンジンの吸気
加熱用ＰＴＣヒータを提供することを目的としている。As a result of intensive research aimed at preventing the above-mentioned corrosion, the present inventor found that many fine pores were generated in the electrode layer when aluminum was sprayed, and the above-mentioned corrosion rapidly progressed from the pores. If an attempt is made to form an anodic oxide film on the surface of the aluminum electrode layer in order to prevent the above corrosion, the anodic oxidation will proceed from the pores to the inside, and the entire electrode layer will become All 20 s. The present invention was developed based on the discovery that the function of That is, in the present invention, the porous surface of an aluminum electrode layer is sealed by shot peening, an anodized film is formed on the surface of the sealed aluminum electrode layer, and the film is further sealed by steam treatment. It is an object of the present invention to provide a PTC heater for heating intake air of an engine, which can significantly improve corrosion resistance through treatment without impairing the functions of the aluminum electrode layer as an electrode and a heat conductive material.
以下本発明の実施例を図について説明する。Embodiments of the present invention will be described below with reference to the drawings.
第１図ないし第３図は本発明の一実施例を示し。1 to 3 show one embodiment of the present invention.
図において、１は吸気通路であり、これの途中には気化
器２が介設され、また該気化器２の少し下流にはヒータ
保持具３が固着され、該保持具３上にはＰＴＣヒータ４
が載置さハており、該ＰＴＣヒータ４の上向はスイッチ
５を介してバッテリ６の陽極側に接続され、またその下
面はアースされている。また２ａは°スロットル弁、３
ａは絶縁体である。In the figure, 1 is an intake passage, a carburetor 2 is interposed in the middle of this, and a heater holder 3 is fixed slightly downstream of the carburetor 2, and a PTC heater is mounted on the holder 3. 4
The upper side of the PTC heater 4 is connected to the anode side of the battery 6 via a switch 5, and the lower side thereof is grounded. In addition, 2a is °throttle valve, 3
a is an insulator.
そして上記ＰＴＣヒータ４のセラミック発熱体７はセラ
ミックを用いて板状体に形成したもので、該発熱体７に
は流通孔７ａが多数形成されており、また該発熱体７の
流通孔７ａの周縁表面上には、アルミ電極層８がアルミ
を溶射して形成されている。そして該アルミ電極層８は
アルミ溶射の際に微細な気孔８ａが多数生成して多孔質
となっており、さらにまた該電極層８にはショットピー
ニングによる封孔処理が施され、その表面部分は気孔８
ａが完全につぶされており、その層厚は２０〜４０μ
となっている。The ceramic heating element 7 of the PTC heater 4 is formed into a plate-shaped body using ceramic, and the heating element 7 is formed with a large number of communication holes 7a. On the peripheral surface, an aluminum electrode layer 8 is formed by spraying aluminum. The aluminum electrode layer 8 is porous due to the generation of many fine pores 8a during aluminum spraying, and furthermore, the electrode layer 8 is sealed by shot peening, and its surface portion is Stomata 8
a is completely crushed and its layer thickness is 20~40μ
It becomes.
そして上記アルミ電極層８の表面には、陽極酸化処理に
より陽極酸化皮膜であるアルマイト層９が層厚５〜１０
μ でもって形成されている。そしてさらに該アルマイ
ト層９には蒸気処理による封孔処理が施され、上記陽極
酸化時に生成した微細な気孔はつぶされて該アルマイト
層９の表面は気孔のない状態となっている。なお第４図
に示すように上記アルマイト層９の層厚がｌＯμ を越
えるとアルミ電極の電気比抵抗が増し、そのためヒータ
の気化性能が低下してしまうこととなり、これを防止す
るた妙このアルマイト層９は１０μ以下の層厚にするの
が望ましい。Then, on the surface of the aluminum electrode layer 8, an alumite layer 9, which is an anodized film, is formed with a thickness of 5 to 10 mm by anodizing treatment.
It is formed by μ. Further, the alumite layer 9 is subjected to pore sealing treatment by steam treatment, and the fine pores generated during the anodic oxidation are crushed, leaving the surface of the alumite layer 9 free of pores. As shown in Fig. 4, if the thickness of the alumite layer 9 exceeds 1Oμ, the electrical resistivity of the aluminum electrode will increase, which will reduce the vaporization performance of the heater. Preferably, layer 9 has a layer thickness of less than 10 microns.
第５図は本実施例のＰＴＣヒータの耐食性試験の結果を
示し、図において１初期値１は新しい試料に電圧１４Ｖ
を印加した場合の電流値を、°耐久後電流値ｌは上記
試料を有鉛ガソリン（ＩＶ）〕中に高温浸漬（１００Ｈ
ｒ、 １５１）’Ｃ） した後に電圧１４■を印加した
場合の電流値を、“差電流値Ｉは上記両型流値の差を、
′変化率ｑは上記１差電流値ぎの“初期値ワに対する変
化率を、“耐久後の抵抗Ｉは上記茜温浸漬後の抵抗値を
、′耐圧試験ｌ欄は直流２４Ｖ を１分間印加した場
合の良否の結果を示す。また１従米ヒータｌとしてはア
ルミ電極層を本実施例と同じ層厚に溶射形成したままの
従来のｐ ’ｒ ｃヒータを用いた。Figure 5 shows the results of the corrosion resistance test of the PTC heater of this example.
The current value after durability is the current value when the above sample is immersed in leaded gasoline (IV) at high temperature (for 100 hours).
r, 151)'C) The current value when voltage 14■ is applied after ``Difference current value I is the difference between the above two types of current values,
'The rate of change q is the rate of change of the above 1 difference current value with respect to the initial value W.'The resistance after durability I is the resistance value after immersion in the madder temperature.'The withstand voltage test column I is the result of applying 24 V DC for 1 minute. Indicates the pass/fail result of the case. Further, as the first secondary heater 1, a conventional p'rc heater was used in which the aluminum electrode layer was thermally sprayed to the same layer thickness as in this embodiment.
図から明らかなように、突入電流は従来ヒータでは初期
値と耐久後とでは１５．５％減少しているのに対し、本
実施例ヒータでは２．０チ減少しているだけであり１本
実施例ヒータは耐食性が大きく向上していることがわか
る。As is clear from the figure, the inrush current in the conventional heater is reduced by 15.5% between the initial value and after durability, whereas in the heater of this embodiment, it is reduced by only 2.0%, which is 1. It can be seen that the example heater has greatly improved corrosion resistance.
このように本実施例では、アルミ電極層８の気孔８ａの
表面部分をショットピーニングによって封孔処理したの
で、陽極酸化処理する際にアルミ電極層８をその内部ま
で酸化させることなくアルマイト層９を薄く形成でき、
従って該電極層８の電極及び熱伝導材としての機能を損
なうことなく。In this example, since the surface portion of the pores 8a of the aluminum electrode layer 8 was sealed by shot peening, the alumite layer 9 could be removed without oxidizing the aluminum electrode layer 8 to its interior during anodizing treatment. Can be formed thinly,
Therefore, the function of the electrode layer 8 as an electrode and a heat conductive material is not impaired.
耐食性を大きく向上できる。さらにまた上記アルマイト
層９にも封孔処理を施したので、鉛の−・ロゲン化合物
が該アルマイト層９の気孔から内方に侵入するとい。う
ことはなく、この点からもさらに耐食性を向上できる。Corrosion resistance can be greatly improved. Furthermore, since the alumite layer 9 was also subjected to a pore sealing treatment, the -.rogen compound of lead entered inward through the pores of the alumite layer 9. Therefore, the corrosion resistance can be further improved from this point as well.
なお、上記アルミ電極層８に対する封孔処理は、陽極酸
化が該電極層８内部に進行するのを防止するため゛であ
るが、該封孔処理により腐食の進行をも防止でき、これ
は耐食性の向上にも寄与しているものである。The purpose of the sealing treatment for the aluminum electrode layer 8 is to prevent anodic oxidation from progressing inside the electrode layer 8, but the sealing treatment also prevents the progress of corrosion, which is due to the corrosion resistance. This also contributes to the improvement of
以上のように、本発明に係るエンジンの吸気加熱用ｐ
’ｒ ｃヒータによれば、アルミ電極層の多孔質表面に
ショットピーニングによる封孔処理を施し、かつ該電極
層表面に陽極酸化皮膜を形成し、さらに該皮膜に蒸気処
理による封孔処理を施したので、アル“ミ電極層の電極
及び熱伝導材としての機能を損なうことなく、耐食性を
大きく向上できる効果がある。As described above, the engine intake air heating p
According to the 'rc heater, the porous surface of the aluminum electrode layer is sealed by shot peening, an anodized film is formed on the surface of the electrode layer, and the film is further sealed by steam treatment. Therefore, the corrosion resistance can be greatly improved without impairing the function of the aluminum electrode layer as an electrode and a heat conductive material.
第１図は本発明の一実施例によるエンジンの吸気加熱用
ＰＴＣヒータの配置図、第２図はその一部断面側面図、
第３図はその一部拡大断面図、第４図はアルマイト層の
層厚と電極の電気比抵抗との関係を示す特性図、第５図
は上記実施例の効果を説明するための図である。
１・・・吸気通路、４・・・ＰＴＣヒ〜り、７・・・セ
ラミック発熱体、８・・・アルミ電極層、９・・・陽極
酸化皮膜（アルマイト層）。
特許出願人 東洋工業株式会社
代理人 弁理士 早 瀬 憲 −第１図
第２図 第３図FIG. 1 is a layout diagram of a PTC heater for heating intake air of an engine according to an embodiment of the present invention, FIG. 2 is a partially sectional side view thereof,
Fig. 3 is a partially enlarged sectional view, Fig. 4 is a characteristic diagram showing the relationship between the thickness of the alumite layer and the electrical resistivity of the electrode, and Fig. 5 is a diagram for explaining the effect of the above embodiment. be. DESCRIPTION OF SYMBOLS 1... Intake passage, 4... PTC heater, 7... Ceramic heating element, 8... Aluminum electrode layer, 9... Anodized film (alumite layer). Patent Applicant Toyo Kogyo Co., Ltd. Agent Patent Attorney Ken Hayase - Figure 1 Figure 2 Figure 3
Claims (1)
を通過するガソリンを加熱気化するＰＴＣヒータであっ
て、セラミック発熱体の表面番こ溶射形成。 されたアルミ電極層の多孔質表面に、ショ′ントピーニ
ングによる封孔処理が施されており、力）つ上記電極層
の表面に陽極酸化皮膜が形成され工おり、さらに該陽極
酸化皮膜に生成した気孔部番こ蒸発処理による封孔処理
が施されＸいることを特徴とするエンジンの吸気加熱用
のｐ ’ｒ ｃ ヒ−タ。(1) A PTC heater is installed in the intake passage of an engine and heats and vaporizes gasoline passing through the passage, and the surface of the ceramic heating element is thermally sprayed. The porous surface of the aluminum electrode layer is sealed by short peening, and an anodic oxide film is formed on the surface of the electrode layer. A p'rc heater for heating intake air of an engine, characterized in that the pores are sealed by evaporation treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58028016A JPS59153962A (en) | 1983-02-21 | 1983-02-21 | Intake heating ptc heater of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58028016A JPS59153962A (en) | 1983-02-21 | 1983-02-21 | Intake heating ptc heater of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59153962A true JPS59153962A (en) | 1984-09-01 |
Family
ID=12236962
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58028016A Pending JPS59153962A (en) | 1983-02-21 | 1983-02-21 | Intake heating ptc heater of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59153962A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6316114A (en) * | 1986-07-08 | 1988-01-23 | Nippon Denso Co Ltd | Heating device for engine oil |
| US6589298B1 (en) * | 2000-05-26 | 2003-07-08 | Integran Technologies, Inc. | Surface treatment of metallic components of electrochemical cells for improved adhesion and corrosion resistance |
-
1983
- 1983-02-21 JP JP58028016A patent/JPS59153962A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6316114A (en) * | 1986-07-08 | 1988-01-23 | Nippon Denso Co Ltd | Heating device for engine oil |
| US6589298B1 (en) * | 2000-05-26 | 2003-07-08 | Integran Technologies, Inc. | Surface treatment of metallic components of electrochemical cells for improved adhesion and corrosion resistance |
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