JPS6158656B2 - - Google Patents
Info
- Publication number
- JPS6158656B2 JPS6158656B2 JP53143766A JP14376678A JPS6158656B2 JP S6158656 B2 JPS6158656 B2 JP S6158656B2 JP 53143766 A JP53143766 A JP 53143766A JP 14376678 A JP14376678 A JP 14376678A JP S6158656 B2 JPS6158656 B2 JP S6158656B2
- Authority
- JP
- Japan
- Prior art keywords
- intake
- intake valve
- partition member
- intake passage
- combustion chamber
- 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
- 238000005192 partition Methods 0.000 claims description 54
- 238000002485 combustion reaction Methods 0.000 claims description 25
- 238000000926 separation method Methods 0.000 claims description 15
- 230000009977 dual effect Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 229910018594 Si-Cu Inorganic materials 0.000 description 1
- 229910008465 Si—Cu Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F1/42—Shape or arrangement of intake or exhaust channels in cylinder heads
- F02F1/4235—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels
- F02F1/4242—Shape or arrangement of intake or exhaust channels in cylinder heads of intake channels with a partition wall inside the channel
-
- 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
- F02F1/00—Cylinders; Cylinder heads
- F02F1/24—Cylinder heads
- F02F2001/244—Arrangement of valve stems in cylinder heads
- F02F2001/245—Arrangement of valve stems in cylinder heads the valve stems being orientated at an angle with the cylinder axis
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)
Description
【発明の詳細な説明】
本発明は、各々独立した低負荷用および高負荷
用吸気通路を単一の吸気孔を介して燃焼室に開口
するようにしたエンジンの複式吸気装置におい
て、シリンダヘツドに形成された吸気通路を分離
壁と仕切部材とによつて分離して低負荷用および
高負荷用吸気ポートを形成する吸気ポートの形成
方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a dual intake system for an engine in which independent low-load and high-load intake passages open into a combustion chamber through a single intake hole. The present invention relates to a method for forming an intake port in which a formed intake passage is separated by a separation wall and a partition member to form a low-load intake port and a high-load intake port.
従来より、エンジンの燃焼室に対し低負荷用お
よび高負荷用の２つの吸気通路を各々独立して開
口した複式吸気装置は一般によく知られている。
この複式吸気装置は、アイドル運転を含む低・中
負荷時には小径の低負荷用吸気通路のみを使用し
て混合気の流速を速め、燃料の気化、霧化を促進
するとともに、高負荷時には高負荷用吸気通路か
らも混合気を供給し、出力の向上を図るようにし
たものである。 2. Description of the Related Art Conventionally, a dual intake system in which two intake passages, one for low load and one for high load, are each independently opened into a combustion chamber of an engine is generally well known.
This dual intake system uses only the small-diameter low-load intake passage during low to medium loads, including idling, to increase the flow velocity of the air-fuel mixture and promote fuel vaporization and atomization. The air-fuel mixture is also supplied from the air intake passage to improve output.
上記複式吸気装置を備えたエンジンにおいて
は、従来の単一の吸気通路からなる吸気装置を備
えたものと比べ、低・中負荷時の燃料の気化、霧
化の促進、あるいはダイレクシヨナルポート（シ
リンダに対し接線方向から吸気を流入させ、シリ
ンダ内でスワールを発生させるようにした吸気ポ
ート）等との組合せによる燃焼室内でのスワール
の強化によつて燃焼効率を向上できる等の種々の
利点を有している。 In engines equipped with the above-mentioned dual intake system, compared to engines equipped with conventional intake systems consisting of a single intake passage, fuel vaporization and atomization are promoted at low and medium loads, or the directional port ( In combination with an intake port (intake port that allows intake air to flow tangentially into the cylinder and generates swirl within the cylinder), the combustion efficiency can be improved by strengthening the swirl within the combustion chamber. have.
そこで、上記複式吸気装置における吸気ポート
の形成方法として、アルミ合金から成るシリンダ
ヘツドの鋳造時に吸気通路を形成するとともに、
上記吸気通路の形成と同時に上記吸気通路の大気
側開口部から吸気弁の頭部より設定距離離れた位
置まで弦状に伸びる分離壁を形成する一方、上記
分離壁に連続して吸気弁の頭部の直上まで弦状に
伸びる仕切部材を、上記吸気通路の燃焼室側開口
部から挿入固定し、上記吸気通路を分離壁および
仕切部材によつて分離し、低負荷用および高負荷
用吸気ポートを形成するものが提案されている。 Therefore, as a method for forming the intake port in the above-mentioned dual intake system, the intake passage is formed during casting of the cylinder head made of aluminum alloy, and
At the same time as the above-mentioned intake passage is formed, a separation wall is formed which extends in a string shape from the atmosphere-side opening of the above-mentioned intake passage to a position a set distance away from the head of the intake valve, and the head of the intake valve is formed continuously with the above-mentioned separation wall. A partition member extending in a chord shape to just above the combustion chamber side is inserted and fixed from the opening of the intake passage on the combustion chamber side, and the intake passage is separated by the separation wall and the partition member, and the intake ports for low load and high load are separated. It has been proposed to form a
しかしながら、上記形成方法においては、シリ
ンダヘツドと同時に鋳造された分離壁に連続して
吸気弁の頭部の直上まで弦状に伸びるよう吸気通
路の燃焼室側開口部から挿入した仕切部材をシリ
ンダヘツドに対して固定するため、例えば、仕切
部材を薄手の鉄板等で製作し、シリンダヘツドに
嵌合溝を設けるとともに該嵌合溝に挿入される挿
入部を仕切部材に設け、上記仕切部材の挿入部を
上記シリンダヘツドの嵌合溝に圧入嵌合する一
方、上記仕切部材を吸気弁座で保持したり、仕切
部材に円筒状のリングを固定し、吸気弁座で上記
リングを保持し、上記仕切部材を支持しているも
のであり、吸気弁座のシール面の機械加工性およ
び仕切部材の組付性、固定強度に問題がある。す
なわち、仕切部材を装着した後に吸気弁座の偏心
修正などを行うシール面の機械加工を施さなけれ
ばならず、その機械加工が吸気弁の頭部の直上ま
で伸びる仕切部材の存在によつて非常に困難とな
り従来の仕切部材を装着していないエンジンに対
する機械加工法は適用できず特殊な加工工程が必
要となると同時に、仕切部材の組付け固定作業が
煩難で生産性が低下するものである。又、仕切部
材の固定力が弱く振動、熱変形等によりずれて吸
気弁と接触して仕切部材が破損する虞れがある。 However, in the above-mentioned forming method, a partition member is inserted from the combustion chamber side opening of the intake passage so as to continue with the separation wall that is cast at the same time as the cylinder head and extend in a string shape to just above the head of the intake valve. For example, the partition member is made of a thin iron plate or the like, a fitting groove is provided in the cylinder head, and an insertion portion to be inserted into the fitting groove is provided on the partition member, and the partition member is inserted into the cylinder head. While press-fitting the partition member into the fitting groove of the cylinder head, the partition member is held by the intake valve seat, or a cylindrical ring is fixed to the partition member and the ring is held by the intake valve seat, and the partition member is held by the intake valve seat. It supports the partition member, and there are problems with the machinability of the sealing surface of the intake valve seat, the assemblability of the partition member, and the fixing strength. In other words, after installing the partition member, the sealing surface must be machined to correct the eccentricity of the intake valve seat, and this machining is extremely difficult due to the presence of the partition member that extends directly above the head of the intake valve. Due to this difficulty, conventional machining methods cannot be applied to engines without partition members, requiring special processing steps, and at the same time, the work of assembling and fixing the partition members is troublesome, reducing productivity. Furthermore, the fixing force of the partition member is weak, and there is a risk that the partition member may be displaced due to vibration, thermal deformation, etc., and come into contact with the intake valve, resulting in damage to the partition member.
本発明はかかる不具合を解消するものであり、
上記提案の吸気ポートの形成方法において、吸気
通路の燃焼室側開口部に吸気弁座をを装着し、該
吸気弁座のシール面加工を施した後、吸気弁軸部
をガイドする吸気弁ガイドと該吸気弁ガイドと一
体化した仕切部材とを燃焼室側開口部より挿入し
てシリンダヘツドに組付けるようにし、その組付
けを容易にし固定強度を向上するとともに、吸気
弁座の機械加工性を改善した複式吸気装置におけ
る吸気ポートの形成方法を提供するものである。 The present invention solves such problems,
In the method for forming an intake port proposed above, an intake valve seat is attached to the combustion chamber side opening of the intake passage, and after the sealing surface of the intake valve seat is processed, an intake valve guide guides the intake valve shaft. The intake valve guide and the integrated partition member are inserted into the combustion chamber side opening and assembled into the cylinder head, which facilitates the assembly and improves the fixing strength, as well as improving the machinability of the intake valve seat. The present invention provides a method for forming an intake port in a dual intake device that improves the above.
以下、本発明の実施例を図面に沿つて説明す
る。第１図および第２図は本発明方法により形成
した複式吸気装置の一例を示し、１は気化器（図
示せず）に接続された吸気マニホールド、２はシ
リンダヘツド３に形成された吸気通路であつて、
その上流の大気側開口部２ａは吸気マニホールド
１と接続され、下流の燃焼室側開口部２ｂは吸気
弁４が装着される吸気孔５を介してシリンダヘツ
ド３内に形成された燃焼室６に開口している。上
記吸気マニホールド１は吸気マニホールド１内に
形成された隔壁７によつて２分割されて各々独立
した小径の低負荷用吸気管８および大径の高負荷
用吸気管９が形成され、各吸気管８，９の上記端
には低負荷用気化器（図示せず）および高負荷用
気化器（図示せず）が具備されている。 Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an example of a multiple intake system formed by the method of the present invention, in which 1 is an intake manifold connected to a carburetor (not shown), 2 is an intake passage formed in a cylinder head 3, and 2 is an intake manifold connected to a carburetor (not shown). It's hot,
The upstream atmosphere side opening 2a is connected to the intake manifold 1, and the downstream combustion chamber side opening 2b is connected to the combustion chamber 6 formed in the cylinder head 3 via the intake hole 5 to which the intake valve 4 is installed. It's open. The intake manifold 1 is divided into two parts by a partition wall 7 formed in the intake manifold 1, and an independent small-diameter low-load intake pipe 8 and a large-diameter high-load intake pipe 9 are formed. The ends of 8 and 9 are equipped with a low load carburetor (not shown) and a high load carburetor (not shown).
また、上記シリンダヘツド３はアルミ合金
（Al−Si−Cu系）にて鋳造され、その鋳造時に吸
気通路２が形成される。１０は、上記吸気通路２
の形成と同時に形成され、吸気通路２の大気側開
口部２ａから吸気弁４の頭部４ａより設定距離離
れた位置まで弦状に伸びる分離壁であり、１１
は、上記分離壁１０に連続して吸気弁４の直上ま
で弦状に伸びるように吸気通路２の燃焼室側開口
部２ｂから挿入された仕切部材である。又、１２
はシリンダヘツド３の吸気弁ガイド穴３ａに燃焼
室側開口部２ａから挿入され吸気弁４の軸部４ｂ
をガイドする吸気弁ガイドである。上記仕切部材
１１と吸気弁ガイド１２とは予め一体にされ、両
者は一体とされた後に燃焼室側開口部２ｂより、
吸気弁ガイド穴３ａおよび吸気通路２に各々挿入
される。１３は燃焼室側開口部２ｂに装着された
吸気弁座である。 Further, the cylinder head 3 is cast from an aluminum alloy (Al-Si-Cu series), and the intake passage 2 is formed at the time of casting. 10 is the intake passage 2
It is a separation wall that is formed at the same time as the formation of 11 and extends in a string shape from the atmosphere side opening 2a of the intake passage 2 to a position a set distance away from the head 4a of the intake valve 4.
is a partition member inserted from the combustion chamber side opening 2b of the intake passage 2 so as to extend in a string shape continuously from the separation wall 10 to just above the intake valve 4. Also, 12
is inserted into the intake valve guide hole 3a of the cylinder head 3 from the combustion chamber side opening 2a, and is inserted into the shaft portion 4b of the intake valve 4.
This is an intake valve guide that guides the The partition member 11 and the intake valve guide 12 are integrated in advance, and after they are integrated, from the combustion chamber side opening 2b,
They are inserted into the intake valve guide hole 3a and the intake passage 2, respectively. 13 is an intake valve seat mounted on the combustion chamber side opening 2b.
前記吸気通路２は上記分離壁１０と仕切部材１
１とによつて２分割されて小径の低負荷用吸気ポ
ート１４および大径の高負荷用吸気ポート１５に
分離形成され、この低負荷用および高負荷用吸気
ポート１４，１５に各々吸気マニホールド１の低
負荷用および高負荷用吸気管８，９が連結され、
以上によつて、各々独立した小径の低負荷用吸気
通路１６および大径の高負荷用吸気通路１７を備
え、それぞれ単一の吸気孔５を介して燃焼室６に
開口する複式吸気装置が構成されている。 The intake passage 2 is connected to the separation wall 10 and the partition member 1.
The intake manifold 1 is divided into two by 1 and formed into a small-diameter low-load intake port 14 and a large-diameter high-load intake port 15, respectively. The low-load and high-load intake pipes 8 and 9 are connected,
As described above, a dual intake system is constructed, which is equipped with a small-diameter low-load intake passage 16 and a large-diameter high-load intake passage 17, each of which opens into the combustion chamber 6 through a single intake hole 5. has been done.
上記仕切部材１１と吸気弁ガイド１２の詳細構
造を第３図ないし第６図に示す。まず、吸気弁ガ
イド１２は、中心部に吸気弁４の軸部４ｂが摺動
可能に挿通される貫通孔１２ａが形成されてパイ
プ状に設けられ、吸気弁４の頭部４ａ側の一端部
１２ｂは外周面が細径に設定されている。 The detailed structures of the partition member 11 and the intake valve guide 12 are shown in FIGS. 3 to 6. First, the intake valve guide 12 is provided in the shape of a pipe, with a through hole 12a formed in the center through which the shaft 4b of the intake valve 4 is slidably inserted, and one end on the head 4a side of the intake valve 4. 12b has an outer circumferential surface set to a small diameter.
一方、仕切部材１１は、中心基部に筒状の係合
部１１ａを有し、該係合部１１ａは内周面が前記
吸気弁ガイド１２の一端部１２ｂ外周面に嵌合さ
れると共に、吸気弁４の軸部４ｂが挿通する透孔
１１ｂを有している。上記係合部１１ａに板状の
仕切体１１ｃが突設され、この仕切体１１ｃは中
央に吸気弁４の軸部４ｂを囲繞するように半円形
状に湾曲した中央部と、この中央部の両側に弦形
状に張出した側部とを有し、端縁１１ｄは傘形の
吸気弁４の頭部４ａに沿うように山形形状に形成
され、側縁１１ｅ，１１ｅは吸気通路２の壁面の
形状および分離壁１０の下流側端面の形状に沿う
ように形成されている。又、上記仕切体１１ｃは
係合部１１ａ側が厚肉に設けられ、端縁１１ｄ側
に行くに従つて薄肉になるように設けられてい
る。１８は仕切部材１１と吸気弁ガイド１２との
圧入嵌合部に固着されるピンである。 On the other hand, the partition member 11 has a cylindrical engaging part 11a at the center base, and the inner circumferential surface of the engaging part 11a is fitted into the outer circumferential surface of the one end part 12b of the intake valve guide 12. It has a through hole 11b through which the shaft portion 4b of the valve 4 is inserted. A plate-shaped partition 11c is provided protrudingly from the engaging portion 11a, and this partition 11c has a central portion curved in a semicircular shape surrounding the shaft portion 4b of the intake valve 4, and The end edge 11d is formed in a chevron shape along the head 4a of the umbrella-shaped intake valve 4, and the side edges 11e, 11e are formed on the wall surface of the intake passage 2. It is formed to follow the shape and the shape of the downstream end surface of the separation wall 10. Further, the partition body 11c is provided so that the engaging portion 11a side is thick, and the wall becomes thinner toward the end edge 11d side. A pin 18 is fixed to a press-fitting portion between the partition member 11 and the intake valve guide 12.
上記複式吸気装置における低負荷用および高負
荷用吸気ポート１４，１５の形成方法を説明すれ
ば、先ず、アルミ合金から成るシリンダヘツド３
の鋳造時に吸気通路２を形成するのであるが、こ
の吸気通路２の形成と同時に分離壁１０をシリン
ダヘツド３と一体の鋳造形成する。一方、アルミ
合金等の材質で仕切部材１１を鋳造形成し、この
仕切部材１１の係合部１１ａを吸気弁ガイド１２
の端部１２ｂの外周面に圧入嵌合した後、ピン１
８を挿着して両者を一体に構成しておく。 To explain how to form the low-load and high-load intake ports 14 and 15 in the above-mentioned dual intake system, first, the cylinder head 3 made of aluminum alloy will be explained.
At the time of casting, the intake passage 2 is formed, and at the same time the intake passage 2 is formed, the separation wall 10 is integrally formed with the cylinder head 3 by casting. On the other hand, the partition member 11 is formed by casting from a material such as aluminum alloy, and the engaging portion 11a of this partition member 11 is connected to the intake valve guide 12.
After the pin 1 is press-fitted to the outer peripheral surface of the end 12b of the
8 is inserted and the two are integrated.
次に、吸気通路２の燃焼室側開口部２ｂに吸気
弁座１３を装着し、この吸気弁座１３のシール面
１３ａ等の機械加工を全て完了させた後に、既に
一体とした上記吸気弁ガイド１２と仕切部材１１
を吸気通路２の燃焼室側開口部２ｂから挿入し、
吸気弁ガイド１２を吸気弁ガイド穴３ａに仕切部
材１１を吸気通路２にそれぞれ挿入して固定せし
め、該シリンダヘツド３に形成された吸気通路２
を分離壁１０と仕切部材１１によつて完全に分離
し、低負荷用および高負荷用吸気ポート１４，１
５を形成するものである。 Next, the intake valve seat 13 is attached to the combustion chamber side opening 2b of the intake passage 2, and after completing all machining of the sealing surface 13a of the intake valve seat 13, the above-mentioned intake valve guide that has already been integrated 12 and partition member 11
Insert it from the combustion chamber side opening 2b of the intake passage 2,
The intake valve guide 12 is inserted into the intake valve guide hole 3a and the partition member 11 is inserted into the intake passage 2 and fixed therein, and the intake passage 2 formed in the cylinder head 3 is fixed.
are completely separated by the separation wall 10 and the partition member 11, and the low-load and high-load intake ports 14, 1
5.
上記実施例では、仕切部材１１と吸気弁ガイド
１２との一体化を、仕切部材１１の係合部１１ａ
を吸気弁ガイド１２外周面に圧入することによつ
て行つているが、仕切部材１１と吸気弁ガイド１
２とを溶接により一体としてもよい。 In the embodiment described above, the integration of the partition member 11 and the intake valve guide 12 is performed using the engaging portion 11a of the partition member 11.
This is done by press-fitting the intake valve guide 12 into the outer peripheral surface of the intake valve guide 12.
2 may be integrated by welding.
又、仕切部材１１と吸気弁ガイド１２とをねじ
止めにより一体としてもよい。 Further, the partition member 11 and the intake valve guide 12 may be integrated by screwing.
さらに、仕切部材１１と吸気弁ガイド１２とを
鋳造により同時に一体形成するようにしてもよ
い。 Furthermore, the partition member 11 and the intake valve guide 12 may be integrally formed at the same time by casting.
又、上記仕切部材１１の形成も実施例のような
鋳造品によるもののほか、板状体によるプレス加
工品でもよい。 Furthermore, the partition member 11 may be formed by a press work made of a plate-shaped body, in addition to being made of a cast product as in the embodiment.
また、低負荷用および高負荷用吸気ポート１
４，１５の配置の関係上、吸気弁ガイド穴３ａの
吸気通路２への開口部に段部が生じ、吸気弁ガイ
ド１２を吸気弁ガイド穴３ａに燃焼室側開口部２
ａより挿入する際吸気弁ガイド１２が段部側に逃
げることにより、その挿入作業が難しくなる可能
性があるが、このような不具合を回避するため、
第７図および第８図に示すように段部Ｓが吸気弁
ガイド穴３ａの吸気通路２への開口部の１カ所に
のみ生じる場合には、その平面部Ｐの範囲θ１を
100゜以上に設定することが好ましく、また、第
９図および第１０図に示すように対向部に２カ所
段部S′，S′が生じる場合には平面部P′，P′の範囲
θ２，θ２を70゜以上に設定することが好まし
い。 In addition, intake port 1 for low load and high load
4 and 15, a step is formed at the opening of the intake valve guide hole 3a to the intake passage 2.
When inserting from A, the intake valve guide 12 may escape to the step side, making the insertion work difficult; however, in order to avoid such a problem,
As shown in FIGS. 7 and 8, when the stepped portion S occurs only at one location of the opening of the intake valve guide hole 3a to the intake passage 2, the range θ 1 of the flat portion P is
It is preferable to set the angle to 100° or more, and if there are two stepped portions S', S' in the opposing parts as shown in FIGS. 9 and 10, the range θ of the flat parts P', P' 2 , θ 2 is preferably set to 70° or more.
以上説明したように、本発明によれば、吸気通
路の燃焼室側開口部に吸気弁座を装着し、該吸気
弁座のシール面加工を施した後、吸気弁ガイドお
よび該吸気弁ガイドと一体化した仕切部材を燃焼
室側開口部より吸気弁ガイド穴および吸気通路に
各々挿入してシリンダヘツドに固定し、吸気ポー
トを分離形成するため、吸気弁座のシール面の機
械加工等が従来通り容易に行うことができ、これ
らのシール面の加工精度の維持を容易に図ること
ができる。 As explained above, according to the present invention, an intake valve seat is attached to the combustion chamber side opening of the intake passage, and after the sealing surface of the intake valve seat is processed, the intake valve guide and the intake valve guide are connected to each other. The integrated partition member is inserted into the intake valve guide hole and intake passage from the combustion chamber side opening and fixed to the cylinder head to form separate intake ports, which requires machining of the sealing surface of the intake valve seat, etc. It is possible to easily maintain the machining accuracy of these sealing surfaces.
又、シリンダヘツドに対する仕切部材の組付固
定を、この仕切部材を吸気弁ガイドと一体とした
後にシリンダヘツドに挿入するだけの簡単な作業
にて行え、生産性が非常に高いものであると同時
に、上記仕切部材は良好な固定が得られ、振動等
によつて仕切部材がずれるようなことが全くない
ものである。 In addition, the partition member can be assembled and fixed to the cylinder head with a simple operation of integrating the partition member with the intake valve guide and then inserting it into the cylinder head, resulting in extremely high productivity. The above-mentioned partition member can be well fixed, and there is no possibility that the partition member will shift due to vibration or the like.
図面は本発明の実施態様を例示し、第１図は複
式吸気装置の一例を示す模式断面図、第２図は第
１図の−線に沿う断面図、第３図は仕切部材
と吸気弁ガイドとの結合状態を示す要部断面正面
図、第４図は同左側面図、第５図は仕切部材の右
側面図、第６図は同底面図、第７図は第２図の
−線に沿う断面図（吸気弁および吸気弁ガイド
を取除いた状態）、第８図は第７図のＡ矢示図、
第９図は他の実施例を示す第７図と同様な断面
図、第１０図は第９図のA′矢示図である。
１……吸気マニホールド、２……吸気通路、２
ａ……大気側開口部、２ｂ……燃焼室側開口部、
３……シリンダヘツド、３ａ……吸気弁ガイド
穴、４……吸気弁、４ａ……頭部、４ｂ……軸
部、５……吸気孔、６……燃焼室、７……隔壁、
８……低負荷用吸気管、９……高負荷用吸気管、
１０……分離壁、１１……仕切部材、１１ａ……
係合部、１１ｂ……透孔、１１ｃ……仕切体、１
２……吸気弁ガイド、１２ａ……貫通孔、１２ｂ
……一端部、１３……吸気弁座、１４……低負荷
用吸気ポート、１５……高負荷用吸気ポート、１
６……低負荷用吸気通路、１７……高負荷用吸気
通路。
The drawings illustrate embodiments of the present invention; FIG. 1 is a schematic sectional view showing an example of a dual intake device, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 3 shows a partition member and an intake valve. 4 is a left side view of the main part showing the state of connection with the guide, 5 is a right side view of the partition member, 6 is a bottom view of the same, and 7 is a line taken along the - line in FIG. 2. (with the intake valve and intake valve guide removed), Figure 8 is a view shown by arrow A in Figure 7,
FIG. 9 is a sectional view similar to FIG. 7 showing another embodiment, and FIG. 10 is a view taken along arrow A' in FIG. 1...Intake manifold, 2...Intake passage, 2
a...Opening on the atmosphere side, 2b...Opening on the combustion chamber side,
3... Cylinder head, 3a... Intake valve guide hole, 4... Intake valve, 4a... Head, 4b... Shaft, 5... Intake hole, 6... Combustion chamber, 7... Partition wall,
8...Intake pipe for low load, 9...Intake pipe for high load,
10... Separation wall, 11... Partition member, 11a...
Engaging portion, 11b...through hole, 11c...partition body, 1
2...Intake valve guide, 12a...Through hole, 12b
... One end, 13 ... Intake valve seat, 14 ... Intake port for low load, 15 ... Intake port for high load, 1
6... Intake passage for low load, 17... Intake passage for high load.
Claims (1)
るとともに、上記吸気通路の形成と同時に上記吸
気通路の大気側開口部から吸気弁の頭部より設定
距離離れた位置まで弦状に伸びる分離壁を形成す
る一方、上記分離壁に連続して吸気弁の頭部の直
上まで弦状に伸びる仕切部材を上記吸気通路の燃
焼室側開口部から挿入し、上記吸気通路を分離壁
および仕切部材によつて分離し、低負荷用および
高負荷用吸気ポートを形成するようにした複式吸
気装置における吸気ポートの形成方法において、
上記吸気通路の燃焼室側開口部に吸気弁座を装着
し、該吸気弁座のシール面加工を施した後、吸気
弁軸部をガイドする吸気弁ガイドおよび該吸気弁
ガイドと一体化した上記仕切部材を燃焼室側開口
部より、吸気弁ガイド穴および吸気通路に各々挿
入するようにしたことを特徴とする複式吸気装置
における吸気ポートの形成方法。1. An intake passage is formed when the cylinder head is cast, and at the same time as the intake passage is formed, a separation wall is formed that extends chordally from the atmosphere-side opening of the intake passage to a position a set distance away from the head of the intake valve. On the other hand, a partition member that extends in a string shape continuously from the separation wall to just above the head of the intake valve is inserted from the combustion chamber side opening of the intake passage, and the intake passage is separated by the separation wall and the partition member. In a method for forming an intake port in a dual intake device in which a low load intake port and a high load intake port are formed,
After installing an intake valve seat at the combustion chamber side opening of the intake passage and processing the sealing surface of the intake valve seat, an intake valve guide that guides the intake valve shaft portion and the above-mentioned intake valve integrated with the intake valve guide are installed. 1. A method for forming an intake port in a multiple intake system, characterized in that a partition member is inserted into an intake valve guide hole and an intake passage from an opening on the combustion chamber side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14376678A JPS5569740A (en) | 1978-11-20 | 1978-11-20 | Formation of suction port in composite suction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14376678A JPS5569740A (en) | 1978-11-20 | 1978-11-20 | Formation of suction port in composite suction device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5569740A JPS5569740A (en) | 1980-05-26 |
| JPS6158656B2 true JPS6158656B2 (en) | 1986-12-12 |
Family
ID=15346517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14376678A Granted JPS5569740A (en) | 1978-11-20 | 1978-11-20 | Formation of suction port in composite suction device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5569740A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58131312A (en) * | 1982-01-29 | 1983-08-05 | Suzuki Motor Co Ltd | Suction device of internal-combustion engine |
| JPS58135354A (en) * | 1982-02-08 | 1983-08-11 | Yamaha Motor Co Ltd | Intake gas path device for engine |
| DE3772297D1 (en) * | 1986-08-14 | 1991-09-26 | Avl Verbrennungskraft Messtech | INLET CHANNEL FOR INTERNAL COMBUSTION ENGINES. |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS48110508U (en) * | 1972-03-28 | 1973-12-19 |
-
1978
- 1978-11-20 JP JP14376678A patent/JPS5569740A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5569740A (en) | 1980-05-26 |
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