JPS6337249B2 - - Google Patents
Info
- Publication number
- JPS6337249B2 JPS6337249B2 JP55084725A JP8472580A JPS6337249B2 JP S6337249 B2 JPS6337249 B2 JP S6337249B2 JP 55084725 A JP55084725 A JP 55084725A JP 8472580 A JP8472580 A JP 8472580A JP S6337249 B2 JPS6337249 B2 JP S6337249B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- ceramic
- cavity
- nozzle part
- cavity part
- 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.)
- Expired
Links
- 239000000919 ceramic Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000003754 machining Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 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
-
- 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)
Description
【発明の詳細な説明】
この発明は、内燃機関の渦流室インサートに関
し、特に詳述すれば、セラミツク製のキヤビテイ
部とセラミツク製の噴口部とを個々に別体に成形
しこれらを金属環で一体型にさせている内燃機関
の渦流室インサートに関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a swirl chamber insert for an internal combustion engine, and more particularly, a ceramic cavity part and a ceramic nozzle part are separately molded and these are connected with a metal ring. This invention relates to a swirl chamber insert for an internal combustion engine that is integrated.
内燃機関の渦流室インサートは、略円錐台形の
室を作るキヤビテイ部と、斜めに穿けられ且つ主
燃焼室に開口する噴口を備える噴口部とを一体成
形した形状を有し、この噴口およびキヤビテイ部
の内壁面の加工は精度も高く必ずしも容易でな
い。一方、耐熱性の面からインサートの素材とし
てセラミツクが注目されている。知られる如く、
セラミツクは、靭性に劣ることから加工上の傷を
嫌い、わずかな傷が原因でセラミツク製インサー
トが割れることが多い。 A swirl chamber insert for an internal combustion engine has a shape in which a cavity part that forms a substantially truncated conical chamber and a nozzle part that is diagonally bored and has a nozzle opening into the main combustion chamber are integrally molded. Machining of the inner wall surface of the machine requires high precision and is not necessarily easy. On the other hand, ceramic is attracting attention as a material for inserts due to its heat resistance. As is known,
Ceramic does not like scratches during processing due to its poor toughness, and ceramic inserts often break due to the slightest scratch.
この発明は、前述した点に着目して開発された
もので、セラミツク製のキヤビテイ部と噴口部と
を個々別体に成形し、とりわけ、噴口の加工を容
易にさせ、該キヤビテイ部と噴口部とを金属環で
一体型にさせている内燃機関の渦流室インサート
を提供することを目的としている。 This invention was developed focusing on the above-mentioned points, and the cavity part and the nozzle part made of ceramic are individually molded, and in particular, the machining of the nozzle part is facilitated, and the cavity part and the nozzle part are formed separately. It is an object of the present invention to provide a swirl chamber insert for an internal combustion engine, which is integrated with a metal ring.
この発明の実施例を添付図面を参照して説明す
る。 Embodiments of the invention will be described with reference to the accompanying drawings.
内燃機関の渦流室インサート１は、略逆円錐台
形の内壁面２を有するキヤビテイ部３と、該キヤ
ビテイ部３とは別体に成形され且つ斜めに穿けら
れた噴口４を有する噴口部５を有する。キヤビテ
イ部３と噴口部５とは、夫々、セラミツクで成形
される。キヤビテイ部３と噴口部５とを、夫々、
別体に成形していることから、キヤビテイ部３の
内壁面２および噴口部５の噴口４の加工はきわめ
て容易となり、キヤビテイ部３と噴口部５とに加
工上の傷を全く与えることはない。 A swirl chamber insert 1 for an internal combustion engine has a cavity part 3 having an inner wall surface 2 in the shape of a substantially inverted truncated cone, and a nozzle part 5 having a nozzle 4 formed separately from the cavity part 3 and bored diagonally. . The cavity part 3 and the nozzle part 5 are each molded from ceramic. The cavity part 3 and the nozzle part 5 are respectively
Since they are molded separately, machining of the inner wall surface 2 of the cavity part 3 and the nozzle 4 of the nozzle part 5 is extremely easy, and no damage is caused to the cavity part 3 and the nozzle part 5 during machining. .
個々別体に成形されたキヤビテイ部３と噴口部
５とは、加熱された金属環６をそれらの外周面に
嵌入し、即ち、焼バメすることで、一体型のイン
サート１とされる。金属環６の巾は、キヤビテイ
部３の外周面の一部を覆う大きさとする。金属環
６の焼バメは、噴口部５とキヤビテイ部３とに、
常時、圧縮応力を加えることになり、この結果、
周囲温度が変化し、セラミツクと金属との間に熱
膨張差が生じても、セラミツク製のキヤビテイ部
３と噴口部５とは、金属環６によつて、常時、適
正範囲の圧縮応力で保持される。 The cavity part 3 and the nozzle part 5, which are individually molded, are made into an integrated insert 1 by inserting a heated metal ring 6 into their outer peripheral surfaces, that is, by shrink-fitting them. The width of the metal ring 6 is made large enough to cover part of the outer peripheral surface of the cavity portion 3. The shrink fit of the metal ring 6 is performed between the nozzle part 5 and the cavity part 3.
Compressive stress is constantly applied, and as a result,
Even if the ambient temperature changes and a difference in thermal expansion occurs between the ceramic and the metal, the ceramic cavity part 3 and the nozzle part 5 are always maintained at an appropriate compressive stress range by the metal ring 6. be done.
以上から明らかなように、この発明では、イン
サートのキヤビテイ部と噴口部とを、夫々、セラ
ミツクで別体に成形していることから、キヤビテ
イ部の内壁面および噴口部の噴口の加工が容易と
なり、インサートに加工上の傷を与えることがな
く、傷に原因する割れを未然に防止できる。さら
に、焼バメされた金属環は、キヤビテイ部と噴口
部とに、常時、適正な圧縮応力を付加しているの
でゆるみはない。 As is clear from the above, in this invention, the cavity part and the nozzle part of the insert are molded separately from ceramic, making it easy to process the inner wall surface of the cavity part and the nozzle part of the nozzle part. , the insert will not be damaged during processing, and cracks caused by scratches can be prevented. Furthermore, the shrink-fitted metal ring always applies appropriate compressive stress to the cavity and the nozzle, so there is no loosening.
図はこの発明の一例のインサートの断面図であ
る。
図中：１……インサート、３……キヤビテイ
部、５……噴口部、６……金属環。
The figure is a sectional view of an insert according to an example of the present invention. In the figure: 1... insert, 3... cavity part, 5... nozzle part, 6... metal ring.
Claims (1)
とセラミツク製噴口部とを、該キヤビテイ部の一
部および該噴口部の外周面に焼バメされる金属環
によつて一体型とさせていることを特徴とする内
燃機関の渦流室インサート。1. A ceramic cavity part and a ceramic nozzle part, which are formed individually, are integrated into one body by a metal ring that is shrink-fitted to a part of the cavity part and the outer peripheral surface of the nozzle part. Swirl chamber inserts for internal combustion engines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8472580A JPS5710723A (en) | 1980-06-23 | 1980-06-23 | Insert for swirl chamber of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8472580A JPS5710723A (en) | 1980-06-23 | 1980-06-23 | Insert for swirl chamber of internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5710723A JPS5710723A (en) | 1982-01-20 |
| JPS6337249B2 true JPS6337249B2 (en) | 1988-07-25 |
Family
ID=13838654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8472580A Granted JPS5710723A (en) | 1980-06-23 | 1980-06-23 | Insert for swirl chamber of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5710723A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58162721A (en) * | 1982-03-19 | 1983-09-27 | Ngk Spark Plug Co Ltd | Sub-combustion chamber for internal-combustion engine |
| JPS6021525U (en) * | 1983-07-21 | 1985-02-14 | 日産自動車株式会社 | Diesel engine subchamber structure |
| EP0141540B1 (en) * | 1983-10-06 | 1989-01-04 | Mazda Motor Corporation | Structure of divided combustion chamber for diesel engine |
-
1980
- 1980-06-23 JP JP8472580A patent/JPS5710723A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5710723A (en) | 1982-01-20 |
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