JPS62197626A - Auxiliary combustion chamber of engine - Google Patents
Auxiliary combustion chamber of engineInfo
- Publication number
- JPS62197626A JPS62197626A JP61040934A JP4093486A JPS62197626A JP S62197626 A JPS62197626 A JP S62197626A JP 61040934 A JP61040934 A JP 61040934A JP 4093486 A JP4093486 A JP 4093486A JP S62197626 A JPS62197626 A JP S62197626A
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- metal ring
- cylinder head
- auxiliary combustion
- fitting portion
- 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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 37
- 239000002184 metal Substances 0.000 claims abstract description 37
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- 238000009792 diffusion process Methods 0.000 claims abstract description 21
- 239000000919 ceramic Substances 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000003647 oxidation Effects 0.000 abstract description 10
- 238000007254 oxidation reaction Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 8
- 230000035515 penetration Effects 0.000 abstract description 5
- 239000004411 aluminium Substances 0.000 abstract 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000873 masking effect Effects 0.000 description 5
- 206010042602 Supraventricular extrasystoles Diseases 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011812 mixed powder Substances 0.000 description 4
- 229910052582 BN Inorganic materials 0.000 description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 238000005269 aluminizing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000004584 weight gain Effects 0.000 description 2
- 235000019786 weight gain Nutrition 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 229910020598 Co Fe Inorganic materials 0.000 description 1
- 229910002519 Co-Fe Inorganic materials 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- -1 N1-Aff and Fe-AQ Chemical class 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000004506 ultrasonic cleaning Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B19/00—Engines characterised by precombustion chambers
- F02B19/16—Chamber shapes or constructions not specific to sub-groups F02B19/02 - F02B19/10
- F02B19/165—The shape or construction of the pre-combustion chambers is specially adapted to be formed, at least in part, of ceramic material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B19/00—Engines characterised by precombustion chambers
- F02B2019/006—Engines characterised by precombustion chambers with thermal insulation
-
- 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)
- Ceramic Engineering (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、セラミック部材によって形成されたエンジン
の副燃焼室に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a secondary combustion chamber of an engine formed of a ceramic member.
（従来の技術）
従来、例えば実開昭５８−１７５１１８号公報において
、副燃焼室を構成するセラミック部材の外周に金属リン
グを嵌合した副燃焼室構成体を、シリンダヘッドに嵌合
してなるものが提案されている。(Prior Art) Conventionally, for example, in Japanese Utility Model Application Publication No. 58-175118, an auxiliary combustion chamber structure in which a metal ring is fitted around the outer periphery of a ceramic member constituting an auxiliary combustion chamber is fitted into a cylinder head. something is proposed.
金属リングあ機能は、セラミック部材をエンジン運転中
の高温時においても動がないよう保持することにある。The function of the metal ring is to hold the ceramic member in place even at high temperatures during engine operation.
したがって、金属リングとして、Ｆｅ−Ｎｉ系合金等の
低熱膨張材を用いることができると、かかる機能の面で
は有利である。しかしながら、低熱膨張材は耐酸化性の
点で劣るので、高温にさらされる金属リングに直ちに適
用すると、強度の低下を招くという問題点があった。Therefore, it is advantageous in terms of this function if a low thermal expansion material such as a Fe-Ni alloy can be used as the metal ring. However, since low thermal expansion materials are inferior in terms of oxidation resistance, there is a problem in that if they are immediately applied to metal rings that are exposed to high temperatures, the strength will decrease.
（発明の目的）
本発明は前記従来の問題点に鑑みなされたもので、セラ
ミック部材の外周に嵌合する金属リングとして低熱膨張
材を用いた場合の強度低下の防止を目的とする。(Object of the Invention) The present invention was made in view of the above-mentioned conventional problems, and an object of the present invention is to prevent a decrease in strength when a low thermal expansion material is used as a metal ring fitted to the outer periphery of a ceramic member.
（発明の構成）
前記目的を達成するために、本発明によるエンジンの副
燃焼室の構成は、副燃焼室を形成するセラミック部材の
外周に金属リングを嵌合した副燃焼室構成体を、シリン
ダヘッドに嵌合してなるものにおいて、金属リングの主
燃焼室に露出した露出面と、シリンダヘッド嵌合部を除
いた外周面とにアルミ拡散浸透層を設けたことを特徴と
している。(Structure of the Invention) In order to achieve the above object, the structure of the auxiliary combustion chamber of the engine according to the present invention is such that the auxiliary combustion chamber structure, in which a metal ring is fitted around the outer periphery of a ceramic member forming the auxiliary combustion chamber, is attached to the cylinder. The cylinder head fitting is characterized in that an aluminum diffusion layer is provided on the exposed surface of the metal ring exposed to the main combustion chamber and on the outer peripheral surface excluding the cylinder head fitting portion.
（実施例） 本発明の実施例を図面に基づいて説明する。(Example) Embodiments of the present invention will be described based on the drawings.
副燃焼室構成体１は、副燃焼室２を形成する上下二分割
のセラミック部材３，４の外周に、略円筒状の金属リン
グ５を例えば焼ばめによって嵌合してなるものである。The auxiliary combustion chamber structure 1 is formed by fitting a substantially cylindrical metal ring 5 to the outer periphery of an upper and lower halves of ceramic members 3 and 4 forming an auxiliary combustion chamber 2, for example, by shrink fitting.
セラミック部材の一例としては、窒化珪素部材を挙げる
ことができる。また、金属リングの一例としては、Ｆｅ
−Ｎｉ系合金等の低熱膨張材よりなるものが挙げられる
。An example of the ceramic member is a silicon nitride member. Further, as an example of a metal ring, Fe
-Those made of a low thermal expansion material such as a Ni-based alloy can be mentioned.
前記副燃焼室構成体１は、シリンダヘッド嵌合部、すな
わち、上側嵌合部１ａと下側嵌合部１ｂにおいてシリン
ダヘッド６に圧入嵌合されている。The auxiliary combustion chamber structure 1 is press-fitted into the cylinder head 6 at the cylinder head fitting portions, that is, the upper fitting portion 1a and the lower fitting portion 1b.
両底合部１ａ、ｌｂの間では、金属リング５とシリンダ
ヘッド６との間に空気断熱層７が設けられている。下側
嵌合部１ｂには、副燃焼室２を主燃焼室８に連通させる
噴出口９が設けられている。An air heat insulating layer 7 is provided between the metal ring 5 and the cylinder head 6 between the two bottom joints 1a and lb. The lower fitting part 1b is provided with an ejection port 9 that communicates the sub-combustion chamber 2 with the main combustion chamber 8.
前記副燃焼室構成体１の下側嵌合部１ａにおいては、金
属リング５につば５ａを設け、該つば５ａをシリンダヘ
ッド１内の空洞の大径部に嵌合させている。In the lower fitting part 1a of the auxiliary combustion chamber structure 1, a collar 5a is provided on the metal ring 5, and the collar 5a is fitted into the large diameter part of the cavity in the cylinder head 1.
なお、セラミック部材３と金属リング５との間には回り
止め部材１０が、また、セラミック部材４と金属リング
５との間には回り止め部材１１が。Note that a rotation prevention member 10 is provided between the ceramic member 3 and the metal ring 5, and a rotation prevention member 11 is provided between the ceramic member 4 and the metal ring 5.
それぞれ介装されている。金属リング５の上端部とシリ
ンダヘッド６との間には、シール材１２が介装されてい
る。１３はグロープラグ取付孔、１４は燃焼噴射ノズル
取付孔、１５はピストンである。１６は位置決め用のボ
ールである。Each is interposed. A sealing material 12 is interposed between the upper end of the metal ring 5 and the cylinder head 6. 13 is a glow plug mounting hole, 14 is a combustion injection nozzle mounting hole, and 15 is a piston. 16 is a positioning ball.
前記金属リング５の主燃焼室８に露出した露出面と、上
側嵌合部１ａ、下側嵌合部１ｂを除いた外周面とには、
アルミ拡散浸透層１７が形成されている。アルミ拡散浸
透層１７は耐酸化性を向上させるために２０μ以上の厚
みが必要である。The exposed surface of the metal ring 5 exposed to the main combustion chamber 8 and the outer peripheral surface excluding the upper fitting part 1a and the lower fitting part 1b include:
An aluminum diffusion permeation layer 17 is formed. The aluminum diffusion layer 17 needs to have a thickness of 20 μm or more in order to improve oxidation resistance.
アルミ拡散浸透層１７の形成方法の代表例として、アル
ミＰＡＣ処理につき説明する。As a typical example of the method for forming the aluminum diffusion layer 17, aluminum PAC treatment will be explained.
まず、前処理として、金属リング５を酸で洗う。First, as a pretreatment, the metal ring 5 is washed with acid.
次いで、金属リング５を純アルミ粉末、アルミナ粉末、
塩化アンモニウム粉末の混合粉末中に埋設する。混合粉
末の組成の代表例を、下記第１表に示す。Next, the metal ring 5 is made of pure aluminum powder, alumina powder,
Embed in a mixed powder of ammonium chloride powder. A typical example of the composition of the mixed powder is shown in Table 1 below.
第１表
上記例２の如く、ミツシュメタルを混合するとアルミニ
ウムの拡散を促し、アルミ拡散浸透層１７を厚くできる
ので好ましい。As in Example 2 of Table 1 above, it is preferable to mix Mitshu metal because it promotes the diffusion of aluminum and allows the aluminum diffusion permeation layer 17 to be made thicker.
次に、金属リング５を埋設した混合粉末を炉内に置き、
水素ガス雰囲気中で加熱保持した後、炉を冷やすアルミ
ナイジングを行う。Next, the mixed powder with the metal ring 5 embedded therein is placed in a furnace,
After heating and holding in a hydrogen gas atmosphere, aluminizing is performed to cool the furnace.
次いで、窒素ガス雰囲気中で加熱保持した後、空冷する
拡散処理を行う。Next, a diffusion process is performed in which the material is heated and maintained in a nitrogen gas atmosphere and then cooled in air.
最後に、超音波洗浄を行う。Finally, perform ultrasonic cleaning.
なお、前記アルミＰＡＣ処理を施す前に、金属リング５
における上側嵌合部１ａ、下側嵌合部１ｂの外周面に相
当する部分に、水ガラス、窒化ボロンの粉末と未ガラス
の混合物等のマスキング剤でマスキングを行い、アルミ
ＰＡＣ処理終了後にマスキング剤を落とすようにする。Note that before performing the aluminum PAC treatment, the metal ring 5
The parts corresponding to the outer peripheral surfaces of the upper fitting part 1a and the lower fitting part 1b are masked with a masking agent such as water glass, a mixture of boron nitride powder and non-glass, and after the aluminum PAC treatment is completed, the masking agent is applied. Make it drop.
このように、シリンダヘッド嵌合部の外周面にはアルミ
拡散浸透層１７を形成しない。その理由は、アルミ拡散
浸透層１７の表面にアルミの酸化物層が形成されるため
熱伝導率の低いアルミ拡散浸透層１７をシリンダヘッド
嵌合部の外周面に設けると、金属リング５の熱がシリン
ダヘッド６に逃げにくくなり、エンジン運転時の高熱で
金属リング５が変形するからである。In this way, the aluminum diffusion permeation layer 17 is not formed on the outer peripheral surface of the cylinder head fitting portion. The reason for this is that an aluminum oxide layer is formed on the surface of the aluminum diffusion penetration layer 17, so if the aluminum diffusion penetration layer 17, which has low thermal conductivity, is provided on the outer peripheral surface of the cylinder head fitting part, the metal ring 5 will heat up. This is because the metal ring 5 becomes difficult to escape into the cylinder head 6, and the metal ring 5 is deformed by the high heat generated during engine operation.
前記マスキング剤が窒化ボロンを含有する場合は、アル
ミＰＡＣ処理後もマスキング剤を残しても差し支えない
。なぜなら、軟らかい窒化ボロンが上側嵌合部１ａ、下
側嵌合部１ｂに付着していると、副燃焼室構成体１をシ
リンダヘッド６に圧入嵌合しやすくなるからである。When the masking agent contains boron nitride, the masking agent may remain after the aluminum PAC treatment. This is because if soft boron nitride adheres to the upper fitting portion 1a and the lower fitting portion 1b, it becomes easier to press-fit the auxiliary combustion chamber structure 1 into the cylinder head 6.
アルミ拡散浸透層１７の形成方法としては、アルミＰＡ
Ｃ処理の他に、金属リング５をアルミ溶湯に浸漬し、加
熱保持してアルミニウムを拡散させてもよい。As a method for forming the aluminum diffusion layer 17, aluminum PA
In addition to the C treatment, the metal ring 5 may be immersed in molten aluminum and heated and held to diffuse aluminum.
シリンダヘッド嵌合部の外周面からアルミ拡散浸透層１
７を除く方法としては、マスキングの他に、機械的な加
工によるものであってもよい。Aluminum diffusion permeation layer 1 from the outer peripheral surface of the cylinder head fitting part
In addition to masking, the method for removing 7 may be mechanical processing.
以下、具体的な実験例について説明する。A specific experimental example will be described below.
低熱膨張材として、日立金属（株）製のＨＲＡ９０４を
用い、ＨＲＡ９０４よりなる試験片に、前記手順通りの
アルミパック処理を施したものを本発明例とした。なお
、混合粉末としては、上記第１表の例２を用いるととも
に、アルミナイジング時の加熱条件は７５０〜ｂ
拡散処理時の加熱時間は９５０〜ｂ
時間とした。形成されたアルミ拡散浸透層の厚みは約４
０μであった。HRA904 manufactured by Hitachi Metals, Ltd. was used as the low thermal expansion material, and a test piece made of HRA904 was subjected to an aluminum pack treatment according to the above procedure as an example of the present invention. Note that Example 2 in Table 1 above was used as the mixed powder, and the heating conditions during aluminizing were 750-b hours, and the heating time during diffusion treatment was 950-b hours. The thickness of the formed aluminum diffusion layer is approximately 4
It was 0μ.
また、ＨＲＡ９０４よりなる試験片にセラミックコーテ
ィングを施したものを比較例１とし、同試験片に何の処
理も施さないものを比較例２とする一方、ＪＩＳ規格の
ＳＵＳ ４０３よりなる試験片を比較例３とした。In addition, Comparative Example 1 is a test piece made of HRA904 with a ceramic coating, Comparative Example 2 is a test piece that is not subjected to any treatment, and a test piece made of JIS SUS 403 is compared. This is Example 3.
ここで、ＨＲＡ ９０４の組成を重量％で示すと次の通
りにな兆。Here, the composition of HRA 904 in weight percent is as follows.
Ｎｉ：３２．５％、Ｃｏ：１４．５％、ＡＱ ：０、８
％、Ｔｉ：２．３％、Ｍｎ：０．２％、 Ｓｉ：ｏ、３
％、Ｃ：０．０５％、Ｂ：０．０３％。Ni: 32.5%, Co: 14.5%, AQ: 0, 8
%, Ti: 2.3%, Mn: 0.2%, Si: o, 3
%, C: 0.05%, B: 0.03%.
Ｚｒ：０．２０％、残部Ｆｅ
市記本発明例、比較例１〜３の試験片を、７５０°Ｃお
よび８５０℃にそれぞれ１００時間保持した後の、ｊｐ
１位面積当りの酸化増量の測定結果を第２図に示す。Ａ
線は本発明例、Ｄ線は比較例１゜Ｄ線は比１咬例２、Ｄ
線は比較例３を示す。Zr: 0.20%, remaining Fe
The measurement results of the oxidation weight gain per unit area are shown in Figure 2. A
The line is the invention example, the D line is the comparative example 1°, the D line is the ratio 1 bite example 2, D
The line indicates Comparative Example 3.
試験結果より明らかなように、１（ＲＡ９０４にアルミ
パック処理を施した場合、高温時の耐酸化性は、他の場
合に比較して１０倍以上優れている。As is clear from the test results, 1 (When RA904 is subjected to aluminum pack treatment, the oxidation resistance at high temperatures is more than 10 times better than in other cases.
これは、アルミ拡散浸透層中に、耐熱性及び耐酸化性に
富むＮ １−Ａｆｆ、 Ｆ ｅ−ＡＱ等の化合物が生成
されるためである。This is because compounds such as N1-Aff and Fe-AQ, which are rich in heat resistance and oxidation resistance, are generated in the aluminum diffusion layer.
なお、本発明に適した低熱膨張材としては、前記ＨＲＡ
９０４の他に、例えば３６％Ｎ１−Ｆ’ｅ合金、３１％
Ｎｉ−５％Ｃｏ −Ｆ ｅ合金等を挙げることかできる
。In addition, as a low thermal expansion material suitable for the present invention, the above-mentioned HRA
In addition to 904, for example, 36% N1-F'e alloy, 31%
Examples include Ni-5%Co-Fe alloy.
（効果）
本発明のエンジンの副燃焼室によれば、次のような優れ
た効果を得ることができる。(Effects) According to the engine sub-combustion chamber of the present invention, the following excellent effects can be obtained.
（Ｉ）金属リングの主燃焼室に露出した露出面と、シリ
ンダヘッド嵌合部を除いた外周面とにアルミ拡散浸透層
を形成して耐酸化性を向上させたので、金属リングが低
熱膨張材よりなる場合でも強度の低下を招かない。(I) An aluminum diffusion permeation layer is formed on the exposed surface of the metal ring exposed to the main combustion chamber and on the outer peripheral surface excluding the cylinder head fitting area to improve oxidation resistance, resulting in a metal ring with low thermal expansion. Even if it is made of wood, it does not cause a decrease in strength.
（ｎ）シリンダヘッド嵌合部の外周面には、アルミ拡散
浸透層が存在しないので、シリンダヘッド嵌合部におけ
る熱伝導性の良さを維持することができ、したがって、
金属リングが高温になるのを防止することができる。(n) Since there is no aluminum diffusion permeation layer on the outer peripheral surface of the cylinder head fitting part, good thermal conductivity in the cylinder head fitting part can be maintained, and therefore,
This can prevent the metal ring from becoming hot.
第１図は本発明の実施例を示す断面図、第２図は温度対
酸化増量の関係を５本発明例および比較例１〜３につい
て示す特性図である。
■・・・・・・副燃焼室モカ成体、１ａ・・・・・・上
側嵌合部、１ｂ・・・・・・下側嵌合部、２・・・・・
副燃力゛６室、３・・・・・・セラミンク部材、４・・
・・・・セラミック部材、５・・・・・・金属リング、
６・・・乃シリンダヘッド、８・・・・・・主燃焼室、
１７・・・・・・アルミ拡散浸透層。
第１図
も２図
混率（０ｃ）FIG. 1 is a sectional view showing an example of the present invention, and FIG. 2 is a characteristic diagram showing the relationship between temperature and oxidation weight gain for five inventive examples and comparative examples 1 to 3. ■・・・Sub-combustion chamber moka complete body, 1a... Upper fitting part, 1b... Lower fitting part, 2...
Secondary combustion chamber 6, 3...Ceramink member, 4...
... Ceramic member, 5 ... Metal ring,
6... No cylinder head, 8... Main combustion chamber,
17...Aluminum diffusion permeation layer. Figure 1 and Figure 2 Mixing rate (0c)
Claims (1)
リングを嵌合した副燃焼室構成体を、シリンダヘッドに
嵌合してなるものにおいて、金属リングの主燃焼室に露
出した露出面と、シリンダヘッド嵌合部を除いた外周面
とにアルミ拡散浸透層を形成したことを特徴とするエン
ジンの副燃焼室。(1) In a sub-combustion chamber structure in which a metal ring is fitted to the outer periphery of a ceramic member forming a sub-combustion chamber, the exposed surface of the metal ring exposed to the main combustion chamber is fitted to the cylinder head. A sub-combustion chamber for an engine, characterized in that an aluminum diffusion permeation layer is formed on the outer peripheral surface excluding the cylinder head fitting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61040934A JPS62197626A (en) | 1986-02-25 | 1986-02-25 | Auxiliary combustion chamber of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61040934A JPS62197626A (en) | 1986-02-25 | 1986-02-25 | Auxiliary combustion chamber of engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62197626A true JPS62197626A (en) | 1987-09-01 |
Family
ID=12594331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61040934A Pending JPS62197626A (en) | 1986-02-25 | 1986-02-25 | Auxiliary combustion chamber of engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62197626A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5970866A (en) * | 1994-09-12 | 1999-10-26 | Tohoku Ricoh Co., Ltd. | Printing machine with sound reducing apparatus |
| US7590370B2 (en) | 2006-06-09 | 2009-09-15 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having openings and a cover |
-
1986
- 1986-02-25 JP JP61040934A patent/JPS62197626A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5970866A (en) * | 1994-09-12 | 1999-10-26 | Tohoku Ricoh Co., Ltd. | Printing machine with sound reducing apparatus |
| US7590370B2 (en) | 2006-06-09 | 2009-09-15 | Brother Kogyo Kabushiki Kaisha | Image forming apparatus having openings and a cover |
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