JPS5888440A - Lightweight cylinder block with sheet metal part - Google Patents
Lightweight cylinder block with sheet metal partInfo
- Publication number
- JPS5888440A JPS5888440A JP18576881A JP18576881A JPS5888440A JP S5888440 A JPS5888440 A JP S5888440A JP 18576881 A JP18576881 A JP 18576881A JP 18576881 A JP18576881 A JP 18576881A JP S5888440 A JPS5888440 A JP S5888440A
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- cylinder
- block
- plate part
- cylinder block
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F7/00—Casings, e.g. crankcases or frames
- F02F7/0021—Construction
- F02F7/0034—Built from sheet material and welded casings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は@量化をはかるため鋼板製シリンダ部とアルミ
合金製ブロック部を組合わせて形成したピストンエンジ
ンのシリ/り・ブロックに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a piston engine cylinder block formed by combining a steel plate cylinder part and an aluminum alloy block part in order to achieve mass reduction.
従来、シリンダ・ブロック1は第1図に示すごとく鉄製
鋳造品による一体構造とされている。BACKGROUND ART Conventionally, a cylinder block 1 has an integral structure made of iron casting, as shown in FIG.
このため設計において強度上の要求よ抄も製造上の制約
によって決められる点が多く、過剰品質とみなせる部分
が多々残されている。たとえば、シリンダ・ブロック1
0強度は安全係数が過大である。ボア間のリプ部は薄肉
にすることができず、第2図のようにシリンダ20間隙
を大きくしなければならない。シリンダ2の周囲に設け
る冷却用水のジャケット5の幅は大きめに作られ、組立
用ねじ穴4はさらに外周に配置され、ブロック1が大き
めに形成される。For this reason, in the design process, requirements for strength and paper size are often determined by manufacturing constraints, leaving many areas that can be considered to be of excessive quality. For example, cylinder block 1
0 strength means that the safety factor is too high. The lip between the bores cannot be made thin, so the gap between the cylinders 20 must be made larger as shown in FIG. The width of the cooling water jacket 5 provided around the cylinder 2 is made larger, the screw holes 4 for assembly are further arranged on the outer periphery, and the block 1 is formed larger.
近年、複雑形状での量産性および軽量化の要求によシ、
アルミ・ブロック化が指向されてきつつある。しかしな
がら、アルミのブロックについてもジャケット部の精度
、強度に重点がおかれておシ、下部スカート部等の精度
や強度が強度上過剰品質になっても上部に合わさざるを
得ない状態にある。したがってスリーブをとってみても
鋳鉄系では4〜5箇が常識であるがそれよりも厚くなっ
ておシ、湿式構造とすれば熱膨張差による異なる材質間
のゆるみが生じ易く性能低下をきたす、スチール・ライ
ナーは薄肉化でき、冷却能も高く、好ましいKもかかわ
らず常用されていないのは、焼入れ処理後の歪音研磨に
要するコストが大なるためである。In recent years, due to the demand for mass production and weight reduction of complex shapes,
The trend is toward aluminum blocks. However, even with regard to aluminum blocks, emphasis is placed on the precision and strength of the jacket part, and even if the precision and strength of the lower skirt part become excessive in terms of strength, they have no choice but to match the upper part. Therefore, when looking at the sleeve, it is common knowledge that there are 4 to 5 parts for cast iron, but it is thicker than that, and if it is a wet structure, the different materials are likely to loosen due to the difference in thermal expansion, resulting in a decrease in performance. Despite the fact that steel liners can be made thinner, have a higher cooling ability, and are preferred by K, they are not commonly used because of the high cost required for distortion-sound polishing after quenching.
本発明は上記欠点を改良するもので、シリンダ・ブロッ
クを鋼板製ブロックとアルミ合金製ブロックに分割し、
鋼板部はシリ゛ンダ・ライナー、冷却用水ジャケットを
有し、アルミ合金部はシリンダ・ブロック下部を構成す
る鋳造品として必要部品を具備し、両者をボルト締めに
て組立てることを特徴とするピストン・エンジンのシリ
ンダ・ブロックを提供するものである。The present invention aims to improve the above drawbacks by dividing the cylinder block into a steel plate block and an aluminum alloy block.
The steel plate part has a cylinder liner and a cooling water jacket, and the aluminum alloy part has the necessary parts as a cast product constituting the lower part of the cylinder block, and both parts are assembled by bolting. It provides engine cylinder blocks.
以下、本発明の一実施例につき図を参照しながら説明す
る。第4図に示すように、シリンダボア部長さの約%の
位置で、本体を鋼板部5とアルミ合金部6とに分割する
。鋼板部5は箱形の本体の上板7にシリンダ・ライナー
8を気筒数に合わせた数だけ直列に並べ溶接して固定す
る。シリンダ・ライナー8は全長の上半分を2重構造と
し、2重円筒の内部を冷却用水のジャケット9にする鋼
板部5の上面には、各シリンダ・ライナー8を取巻くよ
うにボルト孔10を明ける。アルミ合金蔀6祉鋼板部5
のシリンダ・ライナー8が挿入される円筒部11を気筒
数に合わせて直列に並べ、その間隔は鋼板部5のシリン
ダ・ライナー80間隔と一致させる。また、鋼板部5の
ボルト孔に合わせて、アルミ合金部6の上面にボルト孔
10′を明ける。Hereinafter, one embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 4, the main body is divided into a steel plate portion 5 and an aluminum alloy portion 6 at a position approximately % of the cylinder bore length. The steel plate part 5 is fixed to the upper plate 7 of the box-shaped main body by welding cylinder liners 8 arranged in series in a number corresponding to the number of cylinders. The cylinder liner 8 has a double structure in the upper half of its entire length, and the inside of the double cylinder is used as a jacket 9 for cooling water. Bolt holes 10 are bored in the upper surface of the steel plate part 5 so as to surround each cylinder liner 8. . Aluminum alloy cover 6 Welfare steel plate section 5
The cylindrical parts 11 into which the cylinder liners 8 are inserted are arranged in series according to the number of cylinders, and the intervals between them are made to match the intervals between the cylinder liners 80 of the steel plate part 5. Further, bolt holes 10' are formed in the upper surface of the aluminum alloy part 6 to match the bolt holes in the steel plate part 5.
鋼板部5とアルミ合金部6を組立てる場合、各シリンダ
・ライナー8を円筒部11に挿入し、鋼板部リブ12と
アルミ合金部リプ13との間に円筒14を仲介にしてポ
ルト15を用いてボルト締めする。When assembling the steel plate part 5 and the aluminum alloy part 6, each cylinder liner 8 is inserted into the cylindrical part 11, and the cylinder 14 is used as an intermediary between the steel plate part rib 12 and the aluminum alloy part lip 13 using the port 15. Tighten the bolts.
水密のためには、ボルト締めの前に万全を期してアルミ
と熱膨張係数の等しい樹脂たとえばEponJi28;
10Ω、耐熱硬化剤(チバ) HV998:10、炭酸
カルシウムCaCo123Gの高温加熱140’U注型
剤を底部にたらす。また裏側からガラスクロス積層エポ
キシ樹脂で固定させてもよい。For watertightness, before tightening the bolts, make sure to use a resin with the same coefficient of thermal expansion as aluminum, such as EponJi28;
10Ω, heat-resistant curing agent (Ciba) HV998:10, high temperature heating 140'U casting agent of calcium carbonate CaCo123G is dripped onto the bottom. Alternatively, it may be fixed from the back side with a glass cloth laminated epoxy resin.
第5図は上部ブロックを下から見た図で、−シリンダ間
隔Cを極めて狭くできることが特徴である。C値は7±
2■程度にできる。゛たとえば、シリンダ・ライナー2
■で中間リプ2■とすればC=4■が達成される。下記
ブロックのシリンダ間隔も最小値2Mとなるが、高さが
シリンダ・ライナーの5の高さがあり、また爆発力は上
部鋼板製の部分が大きく、下部のアルミ製の部分では小
さくなるため強度的な面で心配することはない。FIG. 5 is a view of the upper block viewed from below, and is characterized by the fact that the -cylinder interval C can be made extremely narrow. C value is 7±
It can be done in about 2■.゛For example, cylinder liner 2
If the intermediate rep is 2■ in ■, C=4■ will be achieved. The minimum distance between the cylinders in the block below is 2M, but the height of the cylinder liner is 5, and the explosive force is greater in the upper steel plate part and smaller in the lower aluminum part, so the strength is There's nothing to worry about from a practical standpoint.
第6図にボア部の代表的な断面図を示す。ここではウォ
ータージャケットがシリンダボア部高さの約%椙度に限
定されている。シリンダライナー8は全面乃至上方6割
方を焼入れする。FIG. 6 shows a typical cross-sectional view of the bore section. Here, the water jacket is limited to approximately % depth of the cylinder bore height. The entire surface of the cylinder liner 8 or the upper 60% thereof is hardened.
焼入れについては歪発生、研磨式が大きくなる等経費が
かさむとされ、いみきられれているがバイト切削表1面
を適当な方法でレーザ乃至電子ビームのビーム焼入れを
して歪発生をなくすことで実用化させられる。またシリ
ンダ・ライナ−80案内円筒面11に、たとえばウォー
ター・ジャケラトナに連通開口する角ねじ状lll11
6を設けて、シリンダ・ライナー下半部におけるピスト
ンの摺動による岸擦熱にそなえることができる。この場
合水波は少なくても十分に間に合うものである。上部と
の循環は加熱され軽くなった水の自然対流でよく、上部
の生える冷却流路に対して−1として機能するものであ
る。このように下部ウォーター・ジャケット部が省略さ
れ、たため、コンパクト化、簡素化されたシリンダ・ブ
ロックができるようになる。ま九湿式方式が剛性上離し
iとされている問題は、加工上の芯合わせには下部ブロ
ックのベアリング穴とボア下部ガイドで一体的に芯を出
す加工が可能になり、これをガイドにしてシリンダ・ラ
イナーを設置して、上面部で鋼板どうしのビーム溶接を
行ない、一体化し固定して強度・剛性を出すもので、十
分圧爆発強度に耐え得る構造になる。Hardening is considered to be expensive due to the generation of distortion and the need for a larger polishing method, so it has been abandoned, but it can be put to practical use by beam hardening the cutting surface of the tool using an appropriate method using a laser or electron beam. be made to become Also, on the cylinder liner 80 guide cylindrical surface 11, for example, a square screw-shaped lll11 is opened to communicate with the water jacket.
6 can be provided to prepare for shore friction heat caused by sliding of the piston in the lower half of the cylinder liner. In this case, even if the water waves are small, they will be sufficient in time. Circulation with the upper part may be a natural convection of heated and lightened water, which functions as a -1 for the cooling channel in which the upper part grows. In this way, the lower water jacket section is omitted, making it possible to create a compact and simplified cylinder block. The problem with the wet type method, which has a high separation due to its rigidity, is that the bearing hole in the lower block and the lower bore guide make it possible to perform centering in one piece, and using this as a guide. A cylinder liner is installed, and the steel plates are beam-welded to each other on the upper surface to be integrated and fixed to provide strength and rigidity, resulting in a structure that can withstand pressure explosion strength.
以上のような構成のため、本シリンダ・ブロックの製作
にはウォーター・ジャケット部の中子が不用に′&)、
外形上はアルミ合金部に凹部が構成されてボルト締めが
行ないやすくなり、作業性が曳くなる。シリンダ・ブロ
ックの上部のみ優れた特性を持つ鉄系のブロックとし、
シリンダ・ライナーを鋼製、焼入れ、研磨を安価に成立
させて、極薄型とし、冷却能を向上させ、下半部のウォ
ーター・ジャケット部を省略でき、シリンダ間隙も狭く
できた。このためシリンダ・ブロックを全体的に小型化
でき軽量化される。Due to the above configuration, the core of the water jacket part is not required in the production of this cylinder block'&),
In terms of external appearance, a recess is formed in the aluminum alloy part, making it easier to tighten bolts and improving workability. Only the upper part of the cylinder block is made of iron-based block with excellent properties.
The cylinder liner was made of steel, hardened and polished at low cost, making it extremely thin, improving cooling ability, eliminating the water jacket in the lower half, and narrowing the cylinder gap. Therefore, the entire cylinder block can be made smaller and lighter.
シリンダの高温化しやすい央部を鉄系構成として別体化
し、熱影響部を従来品である鉄鋳物と同じ精度とするこ
とができピストン間のクリヤランス変化による性能の低
下を解消している1゜湿式構造にかかわらず、上部円周
をビーム溶接し、一体化させて剛性低下の問題を解消し
ている。鋼パイプ内面を焼入れ、研磨し、耐久性、信頼
性を向上している。自動化が進んだ現在では溶接はロボ
ットにょシ行なわせる等の方法を用いて量産化すること
Kよりコスト的にも鋼板化の難点を解決したとみなせる
。従って、本発明によって従来の鋳鉄品に比較して、鋼
板部では肉厚が薄くなり、冷却用水のジャケットの容積
が小さくなり、アルミ合金部ではぜい肉がとれて細身と
なシ、ま丸鉄鋳物に比較して比重が小さくなり、シリン
ダ・ブロック全体が軽量化され、板金・アルミ製シリン
ダ・ブロックの実現性が高められる。The central part of the cylinder, which tends to heat up easily, is made of iron and is made into a separate piece, allowing the heat-affected zone to have the same precision as conventional iron castings, eliminating the performance deterioration caused by changes in clearance between the pistons. Regardless of the wet structure, the upper circumference is beam welded and integrated to solve the problem of reduced rigidity. The inner surface of the steel pipe is hardened and polished to improve durability and reliability. Now that automation has progressed, mass production using methods such as having robots perform welding can be considered to have solved the difficulties of manufacturing steel sheets in terms of cost. Therefore, with the present invention, compared to conventional cast iron products, the steel plate part has a thinner wall thickness and the cooling water jacket volume is smaller, and the aluminum alloy part has less flab and has a slender body. The specific gravity is smaller than that of the cylinder block, making the entire cylinder block lighter, making it more likely that the cylinder block will be made of sheet metal or aluminum.
第1図は従来例による鋳鉄製シリンダ・ブロックの斜視
図、第2図は従来例によるシリンダブロック上面の平面
図、第5図は第2図のA−A、より見え断面図、第4図
は本発明によるシリンダ・ブロックの斜視図、第5図は
第4図Bよ如見た平面図、第6図は第5図C−Cより見
た断面図。
5・・・鋼板部、6・・・アルミ合金部、7・・・鋼板
部上板、8・・・シリンダ・ライナー、9・・・冷却用
水ジャケット、10・・・ボルト孔、11・・・アルミ
合金部の円筒部。Fig. 1 is a perspective view of a conventional cast iron cylinder block, Fig. 2 is a top plan view of the cylinder block according to the conventional example, Fig. 5 is a sectional view taken along line A-A in Fig. 2, and Fig. 4. 5 is a perspective view of a cylinder block according to the present invention, FIG. 5 is a plan view as seen from FIG. 4B, and FIG. 6 is a sectional view taken from FIG. 5 CC. 5... Steel plate part, 6... Aluminum alloy part, 7... Steel plate part upper plate, 8... Cylinder liner, 9... Cooling water jacket, 10... Bolt hole, 11...・Cylindrical part of aluminum alloy part.
Claims (1)
おいて、上半分を鋼板製、下半分をアルミ合金製とし、
鋼板製ブロックの最上部には犀、肉鋼板による箱形の本
体を形成し、上面の鋼板部には気筒数に合わせた数のシ
リンダ・ライナーを溶接固定し、そのシリンダ・ライナ
ーは2重壁構造で冷却用水のジャケットを形成し、鋼板
製ブロックの上面には、シリ/ダライ、ナ一の周囲を堰
巻くようにボルト孔をあけ、アルミ合金製ブロックには
鋼板製ブロックに合わせてシリンダ・ライナーに対して
円筒部を、ボルト孔に対してボルト孔を設け、さらにシ
リンダ・ブロック組立は鋼板製ブロックのシリンダ・ラ
イナーをアルミ合金製ブロックの円筒部に挿着し、強固
にボルト締めして組立てることを特徴とする軽量シリン
ダ・ブロック。(1) In the cylinder block of a piston engine, the upper half is made of steel plate and the lower half is made of aluminum alloy,
At the top of the steel plate block, a box-shaped main body is formed using a solid steel plate.A number of cylinder liners corresponding to the number of cylinders are welded and fixed to the steel plate part on the top surface, and the cylinder liners are double-walled. The structure forms a jacket for cooling water, and bolt holes are drilled on the top surface of the steel plate block so as to surround the cylinder/drill and nai, and cylinders and holes are drilled in the aluminum alloy block to match the steel plate block. A cylindrical part is provided for the liner, and a bolt hole is provided for the bolt hole.Furthermore, the cylinder/block assembly is performed by inserting the cylinder liner of the steel plate block into the cylindrical part of the aluminum alloy block, and firmly tightening the bolts. A lightweight cylinder block that is easy to assemble.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18576881A JPS5888440A (en) | 1981-11-19 | 1981-11-19 | Lightweight cylinder block with sheet metal part |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18576881A JPS5888440A (en) | 1981-11-19 | 1981-11-19 | Lightweight cylinder block with sheet metal part |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5888440A true JPS5888440A (en) | 1983-05-26 |
Family
ID=16176535
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18576881A Pending JPS5888440A (en) | 1981-11-19 | 1981-11-19 | Lightweight cylinder block with sheet metal part |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5888440A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3019732A1 (en) * | 2013-07-09 | 2016-05-18 | Briggs & Stratton Corporation | Welded engine block for small internal combustion engines |
WO2018148774A1 (en) * | 2017-02-14 | 2018-08-23 | Avl List Gmbh | Internal combustion engine comprising a cylinder crankcase |
EP3467287A1 (en) * | 2017-10-06 | 2019-04-10 | Caterpillar Motoren GmbH & Co. KG | Cylinder liner assembly for engine |
US11761402B2 (en) | 2020-03-02 | 2023-09-19 | Briggs & Stratton, Llc | Internal combustion engine with reduced oil maintenance |
-
1981
- 1981-11-19 JP JP18576881A patent/JPS5888440A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3019732A1 (en) * | 2013-07-09 | 2016-05-18 | Briggs & Stratton Corporation | Welded engine block for small internal combustion engines |
WO2018148774A1 (en) * | 2017-02-14 | 2018-08-23 | Avl List Gmbh | Internal combustion engine comprising a cylinder crankcase |
EP3467287A1 (en) * | 2017-10-06 | 2019-04-10 | Caterpillar Motoren GmbH & Co. KG | Cylinder liner assembly for engine |
US11761402B2 (en) | 2020-03-02 | 2023-09-19 | Briggs & Stratton, Llc | Internal combustion engine with reduced oil maintenance |
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