JPH0350260Y2 - - Google Patents
Info
- Publication number
- JPH0350260Y2 JPH0350260Y2 JP15570385U JP15570385U JPH0350260Y2 JP H0350260 Y2 JPH0350260 Y2 JP H0350260Y2 JP 15570385 U JP15570385 U JP 15570385U JP 15570385 U JP15570385 U JP 15570385U JP H0350260 Y2 JPH0350260 Y2 JP H0350260Y2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- engine
- engine cover
- outer layer
- muffler
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 239000011810 insulating material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 4
- 239000012212 insulator Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Description
【考案の詳細な説明】
イ 〔考案の目的〕
(1) 産業上の利用分野
本考案は汎用内燃機関（メイキエンジン）のシ
リンダ、マフラ、エアクリーナ、冷却フアンなど
を覆うエンジンカバーに関する。[Detailed explanation of the invention] A [Purpose of the invention] (1) Industrial application field The present invention relates to an engine cover that covers the cylinder, muffler, air cleaner, cooling fan, etc. of a general-purpose internal combustion engine (make engine).
(2) 従来の技術
第４図、第５図に従来の空冷２サイクルガソリ
ン機関の構造の一部を示す。シリンダ１、マフラ
２をエンジンカバー３が覆つている。このエンジ
ンカバー３は樹脂か板金製が大部分であるが、一
部板金に植毛を塗布したものもある。(2) Prior Art Figures 4 and 5 show part of the structure of a conventional air-cooled two-stroke gasoline engine. An engine cover 3 covers the cylinder 1 and muffler 2. This engine cover 3 is mostly made of resin or sheet metal, but some are made of sheet metal coated with flocking.
機関の運転中及び運転後、機関の熱は熱量の大
きいシリンダ１、マフラ２自体から放熱したり、
シリンダ１と気化器４間のインシユレータ（樹脂
製）５を介してシリンダ１、マフラ２などの熱が
伝達していく。そしてシリンダ１、マフラ２の熱
はこれらを覆つているエンジンカバー３に伝達す
ると共に、エンジンカバー３の冷却風の排出口６
やマフラ側やシリンダ上部側にあけてあるルーバ
７から放熱する。マフラ２からの排気はエンジン
カバー３にあいている穴８より外部へ排出され
る。 During and after engine operation, engine heat is radiated from the cylinder 1 and muffler 2 themselves, which have a large amount of heat, and
Heat from the cylinder 1, muffler 2, etc. is transferred via an insulator (made of resin) 5 between the cylinder 1 and the carburetor 4. The heat from the cylinder 1 and muffler 2 is transferred to the engine cover 3 that covers them, and the cooling air outlet 6 of the engine cover 3
Heat is radiated from the louver 7 provided on the muffler side or the upper side of the cylinder. Exhaust from the muffler 2 is discharged to the outside through a hole 8 formed in the engine cover 3.
エンジンカバー３は上記の様に機関のシリンダ
１、マフラ２などの熱量の大きいものをオペレー
タが直接、接しない様にカバーする目的と、シリ
ンダ１などへ冷却風を導く役目もして、内燃機関
にはなくてはならないものである。 As mentioned above, the engine cover 3 has the purpose of covering the engine's cylinders 1, muffler 2, and other components that produce a large amount of heat so that they do not come into direct contact with the operator, and also serves to guide cooling air to the cylinders 1 and other areas of the internal combustion engine. is indispensable.
(3) 考案が解決しようとする問題点
エンジンカバー３が板金製の場合は、機関の熱
は樹脂製よりも熱伝達率が良いため、エンジンカ
バー３が放熱板となり、早く機関の熱を外部へ放
出するが、その分だけ、エンジンカバー３の表面
温度が200℃くらいと熱くなり、オペレータがこ
れに接触するとヤケドなどして危険であるという
欠点がある。(3) Problems that the invention aims to solve When the engine cover 3 is made of sheet metal, the heat transfer rate of engine heat is better than that of resin, so the engine cover 3 acts as a heat sink and quickly transfers engine heat to the outside. However, the surface temperature of the engine cover 3 becomes as hot as 200 degrees Celsius, and if the operator comes into contact with it, it is dangerous and can cause burns.
一方、エンジンカバー３が樹脂製及び板金製に
植毛などを施したものは、エンジンカバー３の表
面温度が100℃程度と板金製より低いため、上記
の様なヤケドをする程度は少ない利点がある。し
かし板金製よりも熱伝達が悪いため、機関の熱は
エンジンカバー３の内部にこもり、放熱しにくく
なり、シリンダやマフラなどの熱は気化器４など
に伝わり、気化器４の温度が極端に上昇する。こ
の為真夏など外部の温度が高い時、気化器４の内
部にベーパが多量に発生して、機関の始動、加速
などに不調をきたすケースが多々あるという欠点
がある。 On the other hand, when the engine cover 3 is made of resin or sheet metal with flocking, etc., the surface temperature of the engine cover 3 is about 100℃, which is lower than that of sheet metal, so there is an advantage that the degree of burns described above is less. . However, since heat transfer is poorer than that of sheet metal, engine heat is trapped inside the engine cover 3, making it difficult to radiate heat, and heat from the cylinder and muffler is transmitted to the carburetor 4, etc., causing the temperature of the carburetor 4 to become extremely high. Rise. For this reason, when the outside temperature is high, such as in midsummer, a large amount of vapor is generated inside the carburetor 4, which often causes trouble in starting and accelerating the engine.
ロ 〔考案の構成〕
(1) 問題点を解決するための手段
本考案は、エンジンカバーをその外層部を樹脂
又はセラミツクなどの断熱材で、内層部を板金、
アルミなどの放熱材で構成する二重構造とし加え
て外層部と内層部の間に空気層を設け、内層部へ
伝つてくる機関の熱を直接外層部へ伝えないと共
に、機関の放熱を内層部で十分行ない、外層部は
オペレータが直接接してもヤケドなどをしない役
目を行わせるように構成したものである。B [Structure of the invention] (1) Means for solving the problems This invention consists of an engine cover whose outer layer is made of a heat insulating material such as resin or ceramic, and whose inner layer is made of sheet metal or
In addition to the double structure made of heat dissipating material such as aluminum, an air layer is provided between the outer layer and the inner layer to prevent the heat of the engine that is transmitted to the inner layer from being directly transferred to the outer layer. The outer layer is designed to prevent burns even if the operator comes into direct contact with it.
(2) 作用
本考案は上記構成を要旨とするものであつて、
後述する実施例の説明の項で詳しく述べるような
格別な作用を奏するものである。(2) Effect The present invention has the above-mentioned configuration as its gist;
This provides a special effect as will be described in detail in the description of the embodiments below.
(3) 実施例
第１図、第２図、第３図に本願の具体的実施例
を示す。第１図は機関の断面図、第２図はエンジ
ンカバー３のマフラ側部分の斜視図、第３図はエ
ンジンカバー３の構成の一部分を示す断層斜視図
である。(3) Embodiments FIGS. 1, 2, and 3 show specific embodiments of the present application. FIG. 1 is a sectional view of the engine, FIG. 2 is a perspective view of the muffler side portion of the engine cover 3, and FIG. 3 is a tomographic perspective view showing a part of the structure of the engine cover 3.
第１図の１はシリンダ、２はマフラ、３は両者
を覆うエンジンカバー３であり、４は気化器、５
はシリンダ１と気化器をつなぐ樹脂製のインシユ
レータであり、エンジンカバー３は内層部９が板
金又はアルミなどの放熱材で、外層部１０が樹脂
又はセラミツクなどの断熱材で構成される二重構
造となつており、内層部９と外層部１０の間には
空気層１１が構成されている。第３図にこの一部
の断層図を示すが、内層部９と外層部１０とは空
気層１１を挾んで分離されている。外層部１０と
内層部９は隔離部材１２を介して結合されてい
る。 In Fig. 1, 1 is a cylinder, 2 is a muffler, 3 is an engine cover 3 that covers both, 4 is a carburetor, and 5 is a
is a resin insulator that connects the cylinder 1 and the carburetor, and the engine cover 3 has a double structure in which the inner layer 9 is made of a heat dissipating material such as sheet metal or aluminum, and the outer layer 10 is made of a heat insulating material such as resin or ceramic. An air layer 11 is formed between the inner layer portion 9 and the outer layer portion 10. FIG. 3 shows a tomographic diagram of a part of this, and the inner layer part 9 and the outer layer part 10 are separated with an air layer 11 in between. The outer layer portion 10 and the inner layer portion 9 are coupled via a separating member 12.
また、第２図、第３図に示す如く、エンジンカ
バー３の外層部１０には熱の放出の為のルーバ７
が設置されているが内層部９にはルーバ７はな
く、内層部９が外層部１０の表面に突出しない構
造となつている。８はエンジンカバー３に設けら
れたマフラ２からの排気の出口である。 Further, as shown in FIGS. 2 and 3, the outer layer 10 of the engine cover 3 has louvers 7 for releasing heat.
However, there is no louver 7 in the inner layer part 9, and the structure is such that the inner layer part 9 does not protrude from the surface of the outer layer part 10. Reference numeral 8 denotes an outlet for exhaust gas from the muffler 2 provided on the engine cover 3.
機関の運転中、運転後、発生した機関の熱は熱
容量の大きいシリンダ１、マフラ２自体などから
放熱したり、シリンダ１からインシユレータ５を
経て気化器４などに伝達されたりする。シリンダ
１、マフラ２自体から放熱した熱の一部は両者を
覆つているエンジンカバー３に達する。 During and after engine operation, the engine heat generated is radiated from the cylinder 1 and muffler 2 themselves, which have a large heat capacity, or is transferred from the cylinder 1 to the carburetor 4 through the insulator 5. A part of the heat radiated from the cylinder 1 and the muffler 2 reaches an engine cover 3 that covers both.
エンジンカバー３は内層部９が板金などの放熱
性の良い材料で構成されている為シリンダ１、マ
フラ２などの熱が良く伝達される。この伝達され
た熱は内層部９と外層部１０間の空気層１１を通
し流れ、外層部１０のルーバ７などから外部へ放
熱される。 Since the inner layer 9 of the engine cover 3 is made of a material with good heat dissipation such as sheet metal, heat from the cylinder 1, muffler 2, etc. is well transferred. This transferred heat flows through the air layer 11 between the inner layer part 9 and the outer layer part 10, and is radiated to the outside from the louvers 7 of the outer layer part 10.
エンジンカバー３の外層部１０は樹脂などの断
熱性の良い材料で構成され、内層部９との間の空
気層１１で内層部９に伝達された熱は外層部１０
へ伝わりにくくなつている。また内層部９は外層
部１０の表面に突出しない構造となつている為、
オペレータが外層部１０へ接しても内層部９へ直
接接することは無い。 The outer layer 10 of the engine cover 3 is made of a material with good heat insulation properties such as resin, and the heat transferred to the inner layer 9 through the air layer 11 between the outer layer 10 and the inner layer 9 is transferred to the outer layer 10.
It's getting harder to get the message across. In addition, since the inner layer part 9 has a structure that does not protrude from the surface of the outer layer part 10,
Even if the operator touches the outer layer section 10, he does not directly touch the inner layer section 9.
シリンダ１、マフラ２などの熱はエンジンカバ
ー３の内層部９から外部へ積極的に放熱される
為、シリンダ１、マフラ２から気化器４へ伝達さ
れる熱は樹脂性のエンジンカバーの場合より少な
い。 Since the heat of the cylinder 1, muffler 2, etc. is actively radiated to the outside from the inner layer 9 of the engine cover 3, the heat transferred from the cylinder 1 and muffler 2 to the carburetor 4 is lower than in the case of a resin engine cover. few.
ハ 〔考案の効果〕
本考案は、上記の如くエンジンカバーの内層部
が放熱性の良い材料で構成されている為、シリン
ダ、マフラからの熱が良く伝達され、そしてこの
熱は外層部との間の空気層を通して良く流れ、機
関の熱を外部へ早く放熱するので、気化器温度は
極端に上昇せず、高温時、機関の始動・加速がス
ムーズにできる。C [Effects of the invention] As mentioned above, in this invention, the inner layer of the engine cover is made of a material with good heat dissipation, so heat from the cylinder and muffler is well transferred, and this heat is transferred to the outer layer. It flows well through the air layer in between, quickly radiating heat from the engine to the outside, so the carburetor temperature does not rise excessively, allowing the engine to start and accelerate smoothly at high temperatures.
また、エンジンカバーの外層部が断熱性の良い
材料で構成されていて、内層部との間に空気層を
有している為、外層部へは機関の熱は伝わりにく
く、エンジンカバーにオペレータが外部から接し
てもヤケドなどする危険性がない等の実用的効果
を挙げることができる。 In addition, the outer layer of the engine cover is made of a material with good heat insulation properties, and there is an air layer between it and the inner layer, so engine heat is difficult to transfer to the outer layer. It has practical effects such as there is no risk of burns even if it comes in contact with it from the outside.
第１図は本考案の一実施例の概略断面図、第２
図は本考案のマフラ側斜視図、第３図は本考案の
エンジンカバーの断層の一部分図で、第４図は従
来例の略示的断面図、第５図はその外観図であ
る。
１……シリンダ、２……マフラ、３……エンジ
ンカバー、７……ルーバ、９……内層部、１０…
…外層部、１２……隔離部材。
Fig. 1 is a schematic sectional view of one embodiment of the present invention;
The figure is a perspective view of the muffler side of the present invention, FIG. 3 is a partial cross-sectional view of the engine cover of the present invention, FIG. 4 is a schematic sectional view of a conventional example, and FIG. 5 is an external view thereof. DESCRIPTION OF SYMBOLS 1... Cylinder, 2... Muffler, 3... Engine cover, 7... Louver, 9... Inner layer part, 10...
...outer layer part, 12...separation member.
Claims (1)
ーナ、冷却フアンなどを覆うエンジンカバーにお
いて、その外層部を樹脂、セラミツクなどの断熱
材で、内部層をアルミ、板金などの放熱材で構成
する二重構造とし、加えて外層部と内層部間に空
気層を構成してなることを特徴とするエンジンカ
バー。 Engine covers that cover the cylinders, mufflers, air cleaners, cooling fans, etc. of air-cooled internal combustion engines have a double structure in which the outer layer is made of a heat insulating material such as resin or ceramic, and the inner layer is made of a heat dissipating material such as aluminum or sheet metal. An engine cover further comprising an air layer between an outer layer and an inner layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15570385U JPH0350260Y2 (en) | 1985-10-14 | 1985-10-14 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15570385U JPH0350260Y2 (en) | 1985-10-14 | 1985-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6264836U JPS6264836U (en) | 1987-04-22 |
| JPH0350260Y2 true JPH0350260Y2 (en) | 1991-10-28 |
Family
ID=31076641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15570385U Expired JPH0350260Y2 (en) | 1985-10-14 | 1985-10-14 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0350260Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2509143Y2 (en) * | 1989-01-21 | 1996-08-28 | 本田技研工業 株式会社 | Forced air-cooled engine air shroud |
| DE3907083A1 (en) * | 1989-03-04 | 1990-09-06 | Hatz Motoren | INTERNAL COMBUSTION ENGINE WITH NOISE-REDUCING PANELING |
| JP2013147992A (en) * | 2012-01-18 | 2013-08-01 | Hitachi Koki Co Ltd | Engine and engine working machine |
-
1985
- 1985-10-14 JP JP15570385U patent/JPH0350260Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6264836U (en) | 1987-04-22 |
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