JP2007064109A - Intake device of engine - Google Patents

Intake device of engine Download PDF

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JP2007064109A
JP2007064109A JP2005251522A JP2005251522A JP2007064109A JP 2007064109 A JP2007064109 A JP 2007064109A JP 2005251522 A JP2005251522 A JP 2005251522A JP 2005251522 A JP2005251522 A JP 2005251522A JP 2007064109 A JP2007064109 A JP 2007064109A
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engine
intake
core
surge tank
intake passage
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Hisashi Ozeki
久志 尾関
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Suzuki Motor Corp
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Suzuki Motor Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an intake device of an engine capable of preventing a casting defect when integrally forming an intake manifold formed to be reversibly connected to the engine by casting after extending an intake passage extending from a surge tank in the direction for separating from the engine. <P>SOLUTION: This intake device of the engine is constituted by integrally forming the intake manifold by the casting by connecting to an installation flange installed in the engine by reversing to the engine side by a reversing part after extending an intake pipe branching off from the surge tank in the direction for separating from the engine by forming the surge tank of the intake manifold so as to extend in the cylinder row direction of the engine. A core forming an inside space of the surge tank and the intake passage is divided into an upstream side core and a downstream side core by a dividing surface passing through the reversing part, and a through-hole for penetrating a baseboard is formed on an outer wall of the intake passage by projecting the baseboard in at least one reversing part of the upstream side core or the downstream side core. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明はエンジンの吸気装置に係り、特にサージタンクから延びる吸気通路がエンジンから離れる方向に延出された後反転してエンジンに連絡するよう形成された吸気マニホルドを鋳造で一体的に形成する際に、鋳造欠陥を防止するエンジンの吸気装置に関するものである。   The present invention relates to an intake system for an engine, and in particular, when an intake manifold formed so as to reversely communicate with the engine after the intake passage extending from the surge tank extends in a direction away from the engine is integrally formed by casting. In particular, the present invention relates to an engine intake device for preventing casting defects.

エンジンの吸気装置における吸気マニホルドは、鋳造で一体的に形成される。このとき、吸気マニホルドは、エンジンの気筒列方向に延びるように形成したサージタンクと、このサージタンクから分岐し、かつ前記エンジンと離れる方向に延出した後反転部で前記エンジンの側に反転させて前記エンジンに取り付けられる取付フランジに連絡するように形成した吸気管とを有している。   The intake manifold in the engine intake device is integrally formed by casting. At this time, the intake manifold is reversed to the engine side at a surge tank formed so as to extend in the cylinder row direction of the engine, and after being branched from the surge tank and extending away from the engine, the reversing unit. And an intake pipe formed to communicate with a mounting flange attached to the engine.

特開平２−４００７１号公報Japanese Patent Laid-Open No. 2-40071 特開平８−３０９４８０号公報JP-A-8-309480

ところで、従来のエンジンの吸気装置においては、サージタンクと吸気通路とを備えた吸気マニホルドを鋳造で一体的に形成する場合に、サージタンク及び吸気通路の内部空間を形成する中子から巾木を突出させ、巾木を介して中子を外型の内部に所定の間隔を設けた状態で固定し、この隙間に溶湯を注入している。   By the way, in a conventional engine intake device, when an intake manifold having a surge tank and an intake passage is integrally formed by casting, a baseboard is formed from a core that forms an internal space of the surge tank and the intake passage. The core is fixed in a state where a predetermined interval is provided inside the outer mold through the baseboard, and the molten metal is injected into this gap.

一方、前記吸気マニホルドにおいては、吸気通路の長さを長くするために、サージタンクから分岐する吸気管をエンジンから離れる方向に延出した後、反転部で反転させて前記エンジンに連絡するようにするものがある。   On the other hand, in the intake manifold, in order to increase the length of the intake passage, the intake pipe branched from the surge tank extends in a direction away from the engine, and then is reversed at the reversing portion to communicate with the engine. There is something to do.

このとき、サージタンクから反転部に至る吸気通路と、反転部から取付フランジに至る吸気通路とが反転部を挟んで対向するように延びるため、反転部の曲げ中心側には外周を吸気マニホルドの外壁に囲まれる空間部が形成される。   At this time, the intake passage extending from the surge tank to the reversing portion and the intake passage extending from the reversing portion to the mounting flange extend so as to face each other across the reversing portion. A space surrounded by the outer wall is formed.

そして、この空間部が反転部に囲まれる奥部からサージタンクと取付フランジの間に形成される開口部に向かって次第に広がる場合は、空間部を形成する型を奥部から開口部に向かう方向に抜くことができサージタンクと吸気通路の内部空間を形成する中子を一体に形成することが可能であるが、空間部にサージタンクやサージタンクに接続された共鳴室が突出して開口部が狭くなる場合がある。   And when this space part spreads gradually toward the opening formed between the surge tank and the mounting flange from the back part surrounded by the reversing part, the direction from the back part toward the opening part is the mold that forms the space part. The surge tank and the core that forms the internal space of the intake passage can be integrally formed, but the surge tank and the resonance chamber connected to the surge tank protrude into the space and the opening is It may become narrower.

このような場合には、前記内部空間を形成する中子を反転部を通る分割面で分割して形成し、夫々を分割された外型にセットしたうえで、両者を接合して鋳造することになるが、従来の中子を一体に形成したもののように、巾木をサージタンクの所定箇所と吸気通路の下流側端部に設けただけでは、前記反転部で吸気マニホルドの外壁を形成する外型と中子の位置ズレが発生して鋳造欠陥が発生し易くなるという不都合がある。   In such a case, the core that forms the internal space is formed by dividing it by a dividing surface that passes through the reversal part, and after setting each of the divided outer molds, both are joined and cast. However, just by providing a baseboard at a predetermined location of the surge tank and the downstream end of the intake passage as in the case where the conventional core is integrally formed, the outer wall of the intake manifold is formed by the reversal portion. There is an inconvenience that a positional deviation between the outer mold and the core occurs and casting defects are likely to occur.

この発明では、前記反転部を備える吸気マニホルドを鋳造で一体的に形成する際の、鋳造欠陥を防止するとともに、生産性を向上できるエンジンの吸気装置を提案する。   The present invention proposes an engine intake device that can prevent casting defects and improve productivity when integrally forming an intake manifold including the reversal portion by casting.

従って、この発明の目的は、サージタンクから延びる吸気通路がエンジンから離れる方向に延出された後反転してエンジンに連絡するよう形成された吸気マニホルドを鋳造で一体的に形成する際に、鋳造欠陥を防止できるエンジンの吸気装置を実現するにある。   Accordingly, an object of the present invention is to form an intake manifold integrally formed by casting so that an intake passage extending from a surge tank extends in a direction away from the engine and then reverses to communicate with the engine. The object is to realize an engine intake system that can prevent defects.

そこで、この発明は、上述不都合を除去するために、吸気マニホルドのサージタンクをエンジンの気筒列方向に延びるように形成し、このサージタンクから分岐する吸気管を前記エンジンと離れる方向に延出した後反転部で前記エンジンの側に反転させて前記エンジンに取り付けられる取付フランジに連絡するとともに、前記吸気マニホルドを鋳造で一体的に形成するエンジンの吸気装置において、前記サージタンク及び前記吸気通路の内部空間を形成する中子を前記反転部を通る分割面で上流側中子と下流側中子とに分割するとともに、前記上流側中子または前記下流側中子の少なくとも一方の前記反転部に巾木を突出させ、前記吸気通路の外壁に前記巾木を貫通させる貫通孔を形成したことを特徴とする。   Therefore, in order to eliminate the above-described disadvantages, the present invention forms a surge tank of the intake manifold so as to extend in the cylinder row direction of the engine, and extends an intake pipe branching from the surge tank in a direction away from the engine. In an intake system for an engine in which the intake manifold is integrally formed by casting while being connected to a mounting flange attached to the engine by being inverted to the engine side at a rear inversion portion, the interior of the surge tank and the intake passage A core that forms a space is divided into an upstream core and a downstream core at a dividing plane that passes through the reversing portion, and a width is provided to at least one of the reversing portions of the upstream core or the downstream core. A wood is protruded, and a through hole is formed in the outer wall of the intake passage to allow the baseboard to pass therethrough.

以上詳細に説明した如くこの本発明によれば、吸気マニホルドのサージタンクをエンジンの気筒列方向に延びるように形成し、このサージタンクから分岐する吸気管を前記エンジンと離れる方向に延出した後反転部で前記エンジンの側に反転させて前記エンジンに取り付けられる取付フランジに連絡するとともに、前記吸気マニホルドを鋳造で一体的に形成するエンジンの吸気装置において、前記サージタンク及び前記吸気通路の内部空間を形成する中子を前記反転部を通る分割面で上流側中子と下流側中子とに分割するとともに、前記上流側中子または前記下流側中子の少なくとも一方の前記反転部に巾木を突出させ、前記吸気通路の外壁に前記巾木を貫通させる貫通孔を形成したので、外型に巾木を介して位置決めされたサージタンクと取付フランジの両者から離れているため位置ズレが発生し易いとともに、上流側中子と下流側中子との位置ズレが発生し易い反転部において中子と外型との位置ズレを防止しでき、鋳造欠陥の発生を防止できる。   As described above in detail, according to the present invention, the surge tank of the intake manifold is formed so as to extend in the cylinder row direction of the engine, and the intake pipe branched from the surge tank is extended in a direction away from the engine. In an intake system for an engine in which the reversing portion is reversed to the engine side and communicates with a mounting flange attached to the engine, and the intake manifold is integrally formed by casting, an internal space of the surge tank and the intake passage Is divided into an upstream core and a downstream core at a dividing plane passing through the reversing portion, and a baseboard is provided on at least one reversing portion of the upstream core or the downstream core. And a through-hole through which the baseboard is penetrated is formed in the outer wall of the intake passage, and a surge tank positioned through the baseboard and Because it is separated from both of the flanges, misalignment is likely to occur, and it is possible to prevent misalignment between the core and the outer mold at the reversing part where misalignment between the upstream core and the downstream core is likely to occur. The occurrence of casting defects can be prevented.

上述の如く発明したことにより、吸気管に反転部を備える吸気マニホルドを鋳造で一体的に形成する際には、上流側中子または下流側中子の少なくとも一方の反転部に巾木を突出させ、吸気通路の外壁に巾木を貫通させる貫通孔を形成して反転部において中子と外型との位置ズレを防止し、鋳造欠陥の発生を防止している。   As a result of the invention as described above, when integrally forming the intake manifold having the reversing portion in the intake pipe by casting, the baseboard protrudes from at least one reversing portion of the upstream core or the downstream core. A through hole that allows the baseboard to pass through is formed in the outer wall of the intake passage to prevent misalignment between the core and the outer mold at the reversing portion, thereby preventing the occurrence of casting defects.

以下図面に基づいてこの発明の実施例を詳細に説明する。   Embodiments of the present invention will be described below in detail with reference to the drawings.

図１〜図７はこの発明の実施例を示すものである。図２及び図３において、１はエンジンである。   1 to 7 show an embodiment of the present invention. 2 and 3, reference numeral 1 denotes an engine.

このエンジン１は、シリンダブロック２と、このシリンダブロック２の上面に装着されるシリンダヘッド３と、このシリンダヘッド３の上面に装着されるシリンダヘッドカバー４と、前記シリンダブロック２の下面に装着されるオイルパン５とからなる。   The engine 1 is mounted on a cylinder block 2, a cylinder head 3 mounted on the upper surface of the cylinder block 2, a cylinder head cover 4 mounted on the upper surface of the cylinder head 3, and a lower surface of the cylinder block 2. It consists of an oil pan 5.

そして、図２に示す如く、前記エンジン１の後側（「車両搭載時後側」ともいう。）、つまり図２において左側に吸気マニホルド６を配設するとともに、エンジン１の前側（「車両搭載時前側」ともいう。）、つまり図２において右側には排気マニホルド７を配設する。   As shown in FIG. 2, an intake manifold 6 is disposed on the rear side of the engine 1 (also referred to as “rear side when mounted on the vehicle”), that is, on the left side in FIG. It is also referred to as the “front side”.) That is, the exhaust manifold 7 is disposed on the right side in FIG.

また、図２及び図３に示す如く、前記吸気マニホルド６よりも上方、かつエンジン１の上部にエアクリーナ８を配設し、図３に示す如く、このエアクリーナ８の左側にエアインレットダクト９とエアアウトレットホース１０とを配設する。   2 and 3, an air cleaner 8 is disposed above the intake manifold 6 and above the engine 1. As shown in FIG. 3, an air inlet duct 9 and an air cleaner are provided on the left side of the air cleaner 8. As shown in FIG. An outlet hose 10 is disposed.

図２及び図３に示す如く、前記吸気マニホルド６と同等高さ位置、かつ吸気マニホルド６の右側に圧力センサ１１を配設するとともに、図３に示す如く、前記吸気マニホルド６と同等高さ位置、かつ吸気マニホルド６の左側にはスロットルボディ１２を配設する。   As shown in FIGS. 2 and 3, a pressure sensor 11 is disposed at the same height as the intake manifold 6 and on the right side of the intake manifold 6, and as shown in FIG. A throttle body 12 is disposed on the left side of the intake manifold 6.

更に、図２及び図３に示す如く、前記吸気マニホルド６と同等高さ位置、かつエンジン１の右側にエンジンマウント１３を配設し、前記吸気マニホルド６よりも下方、かつエンジン１の右側にはオルタネータ１４とウォータポンプ１５とを配設する。   Further, as shown in FIGS. 2 and 3, an engine mount 13 is disposed at the same height as the intake manifold 6 and on the right side of the engine 1, and below the intake manifold 6 and on the right side of the engine 1. An alternator 14 and a water pump 15 are provided.

このとき、前記吸気マニホルド６は、図４〜図６に示す如く、前記エンジン１の気筒列方向に延びるように形成したサージタンク１６と、このサージタンク１６の左側に形成したスロットルボディ側取付フランジ１７と、サージタンク１６の右側に形成した圧力センサ取付部１８と、前記エンジン１に取り付けられる取付フランジ１９と、前記サージタンク１６から分岐し、前記エンジン１と離れる方向に延出した後反転部２０で前記エンジン１の側に反転させて前記取付フランジ１９により前記エンジン１に取り付けられる吸気管２１、例えば４本の第１〜第４吸気管２１ａ、２１ｂ、２１ｃ、２１ｄと、前記サージタンク１６近傍に形成される共鳴室２２と、この共鳴室２２と前記吸気管２１の取付フランジ１９近傍部位とを連絡するリブ２３とを有する。   At this time, the intake manifold 6 includes a surge tank 16 formed so as to extend in the cylinder row direction of the engine 1 and a throttle body side mounting flange formed on the left side of the surge tank 16 as shown in FIGS. 17, a pressure sensor mounting portion 18 formed on the right side of the surge tank 16, a mounting flange 19 mounted on the engine 1, a branching portion from the surge tank 16, and extending in a direction away from the engine 1, and a reverse portion 20, intake pipes 21, for example, four first to fourth intake pipes 21a, 21b, 21c, 21d, which are reversed to the engine 1 side and attached to the engine 1 by the mounting flange 19, and the surge tank 16 A resonance chamber 22 formed in the vicinity of the resonance chamber 22 is connected to a portion near the mounting flange 19 of the intake pipe 21. And a 23.

そして、図１に示す如く、前記吸気マニホルド６を鋳造で一体的に形成する際に、前記サージタンク１６及び前記吸気管２１内の吸気通路２４の内部空間を形成する中子２５を前記反転部２０を通る分割面２６で上流側中子２７と下流側中子２８とに分割するとともに、前記上流側中子２７または前記下流側中子２８の少なくとも一方の前記反転部２０に巾木２９を突出させ、前記吸気管２１の壁部の一部である前記吸気通路２４の外壁、つまり反転部壁３０に前記巾木２９を貫通させる貫通孔３１を形成する構成とする。   As shown in FIG. 1, when the intake manifold 6 is integrally formed by casting, a core 25 that forms an internal space of the intake passage 24 in the surge tank 16 and the intake pipe 21 is replaced with the inversion portion. 20 is divided into an upstream core 27 and a downstream core 28 at a dividing surface 26, and a base board 29 is provided on at least one reversing portion 20 of the upstream core 27 or the downstream core 28. A through hole 31 is formed to project through the outer wall of the intake passage 24, which is a part of the wall portion of the intake pipe 21, that is, the reversal portion wall 30.

詳述すれば、前記吸気マニホルド６を鋳造で一体的に形成する際には、外型、つまり積層される上側外型３２と下側外型３３とを使用するとともに、上流側中子２７と下流側中子２８とに分割される中子２５以外にも、前記吸気通路２４の外壁部３４及び前記サージタンク１６の外壁部３５、前記共鳴室２２の外壁部３６とに囲繞される空間部３７を形成するための空間部形成中子３８を使用する。   More specifically, when the intake manifold 6 is integrally formed by casting, an outer mold, that is, an upper outer mold 32 and a lower outer mold 33 to be stacked are used, and an upstream core 27 and In addition to the core 25 divided into the downstream core 28, a space portion surrounded by the outer wall portion 34 of the intake passage 24, the outer wall portion 35 of the surge tank 16, and the outer wall portion 36 of the resonance chamber 22. A space forming core 38 for forming 37 is used.

なお、図１に示す実施例では、前記巾木２９を、前記上流側中子２７と下流側中子２８との双方に設け、上流側中子２７に設けた上流側巾木３９と下流側中子２８に設けた下流側巾木４０により構成するとともに、これらの上流側巾木３９及び下流側巾木４０を前記分割面２６で接合される形状に形成する。   In the embodiment shown in FIG. 1, the baseboard 29 is provided on both the upstream core 27 and the downstream core 28, and the upstream baseboard 39 provided on the upstream core 27 and the downstream side are provided. In addition to the downstream skirting board 40 provided in the core 28, the upstream skirting board 39 and the downstream skirting board 40 are formed in a shape joined by the dividing surface 26.

また、図４に示す如く、前記吸気マニホルド６の吸気管２１途中の反転部２０、かつ前記吸気通路２４の外壁である反転部壁３０に前記貫通孔３１を閉塞するプラグ４１を圧入するボス４２を形成している。   As shown in FIG. 4, the boss 42 press-fits the plug 41 that closes the through hole 31 into the reversing portion 20 in the middle of the intake pipe 21 of the intake manifold 6 and the reversing portion wall 30 that is the outer wall of the intake passage 24. Is forming.

更に、前記プラグ４１は、図７に示す如く、底面４１ａが前記吸気通路２４側に突出する断面Ｕ字状の曲面に形成され、前記プラグ４１の底面４１ａが前記吸気通路２４の内壁部分、つまり外側壁部３０の内壁面４３から前記吸気通路２４内へ突出するよう前記貫通孔３１の軸方向に位置決めされる。   Further, as shown in FIG. 7, the plug 41 is formed in a U-shaped curved surface with a bottom surface 41a protruding toward the intake passage 24, and the bottom surface 41a of the plug 41 is an inner wall portion of the intake passage 24, that is, The through hole 31 is positioned in the axial direction so as to protrude from the inner wall surface 43 of the outer wall portion 30 into the intake passage 24.

つまり、前記貫通孔３１に前記プラグ４１を位置決めして取り付ける際には、図７に示す如く、プラグ４１の底面４１ａを前記吸気通路２４の内壁部分である外側壁部３０の内壁面４３から前記吸気通路２４内へ突出代Ｓだけ突出させ、プラグ４１の底面４１ａの外縁部分と貫通孔３１の内周面部分との間に現出されていた段差を解消するものである。   That is, when the plug 41 is positioned and attached to the through hole 31, the bottom surface 41a of the plug 41 is removed from the inner wall surface 43 of the outer wall 30 which is the inner wall portion of the intake passage 24 as shown in FIG. The protrusion S is protruded into the intake passage 24 to eliminate the step appearing between the outer edge portion of the bottom surface 41 a of the plug 41 and the inner peripheral surface portion of the through hole 31.

なお、符号４４は、上流側中子２７と下流側中子２８と空間部形成用中子３８とを前記下側外型３３と前記上側外型３２との内部に所定間隔を有する状態で配置した際に現出する隙間である。この隙間に溶湯を流し込むことで吸気マニホルドが形成される。   Reference numeral 44 indicates that the upstream core 27, the downstream core 28, and the space forming core 38 are disposed in the lower outer mold 33 and the upper outer mold 32 with a predetermined interval. It is a gap that appears when An intake manifold is formed by pouring molten metal into the gap.

次に作用を説明する。   Next, the operation will be described.

前記吸気マニホルド６を鋳造で一体的に形成する際には、前記反転部２０において、前記下側外型３３に前記上流側中子２７を配置するとともに、この上流側中子２７の上流側巾木３９を前記貫通孔３１から突出させて下側外型３３に支持する。   When the intake manifold 6 is integrally formed by casting, the upstream core 27 is disposed in the lower outer mold 33 in the reversing portion 20, and the upstream width of the upstream core 27 is set. A tree 39 is projected from the through hole 31 and supported by the lower outer mold 33.

また、前記吸気通路２４の内側壁部３４及び前記サージタンク１６の内側壁部３５、前記共鳴室２２の内側壁部３６とにより囲繞される空間部３７を確保するための空間部形成用中子３８を配置する。   Further, a space portion forming core for securing a space portion 37 surrounded by the inner wall portion 34 of the intake passage 24, the inner wall portion 35 of the surge tank 16, and the inner wall portion 36 of the resonance chamber 22. 38 is arranged.

一方、前記上側外型３２には前記下流側中子２８を配設し、前記下流側中子２８の下流側巾木４０を前記貫通孔３１から突出させて上側外型３２に支持する。そして、前記上流側中子２７と下流側中子２８とを分割面２６にて接合するように前記下側外型３３に前記上側外型３２を上方から積層する。   On the other hand, the downstream core 28 is disposed in the upper outer mold 32, and the downstream base 40 of the downstream core 28 is protruded from the through hole 31 and supported by the upper outer mold 32. Then, the upper outer mold 32 is laminated on the lower outer mold 33 from above so that the upstream core 27 and the downstream core 28 are joined at the dividing surface 26.

その後、図１に示す如く、前記上流側中子２７と下流側中子２８と空間部形成中子３８の外周面と前記上側外型３２と前記下側外型３３の内周面との間に形成された前記隙間４４に溶湯を注入する。   Thereafter, as shown in FIG. 1, between the outer peripheral surface of the upstream core 27, the downstream core 28, the space forming core 38, and the inner peripheral surface of the upper outer mold 32 and the lower outer mold 33. The molten metal is poured into the gap 44 formed in the above.

鋳造にて一体的に形成した前記吸気マニホルド６に現出される前記貫通孔３１に前記プラグ４１を取り付ける際には、図７に示す如く、プラグ４１の断面Ｕ字状の曲面からなる底面４１ａを前記吸気通路２４の内壁部分である外側壁部３０の内壁面４３から前記吸気通路２４内へ突出代Ｓだけ突出するように挿入し、プラグ４１の底面４１ａの外縁部分と貫通孔３１の内周面部分との間に段差が現出されないように取り付ける。   When the plug 41 is attached to the through hole 31 appearing in the intake manifold 6 integrally formed by casting, as shown in FIG. 7, the bottom surface 41a having a U-shaped curved surface of the plug 41 is provided. Is inserted so as to protrude into the intake passage 24 from the inner wall surface 43 of the outer wall portion 30 which is the inner wall portion of the intake passage 24 by the protrusion margin S, and the inner edge of the bottom surface 41a of the plug 41 and the through hole 31 are inserted. Install so that no step appears between the peripheral part.

これにより、前記吸気マニホルド６を鋳造で一体的に形成する際に、前記サージタンク１６及び前記吸気管２１内の吸気通路２４の内部空間を形成する中子２５を前記反転部２０を通る分割面２６で上流側中子２７と下流側中子２８とに分割するとともに、前記上流側中子２７または前記下流側中子２８の少なくとも一方の前記反転部２０に巾木２９を突出させ、前記吸気管２１の壁部の一部である前記吸気通路２４の外壁、つまり外側壁部３０に前記巾木２９を貫通させる貫通孔３１を形成する構成としたことによって、前記反転部２０において中子２５と外型である上側外型３２及び下側外型３３との位置ズレを防止することができ、鋳造欠陥の発生を防止し得るものである。   As a result, when the intake manifold 6 is integrally formed by casting, the core 25 that forms the internal space of the intake passage 24 in the surge tank 16 and the intake pipe 21 passes through the reversing portion 20. 26, the upstream core 27 and the downstream core 28 are divided, and a base board 29 is projected from at least one of the reversing portions 20 of the upstream core 27 or the downstream core 28, and the intake air By forming a through hole 31 that allows the baseboard 29 to penetrate the outer wall of the intake passage 24, that is, the outer wall portion 30, which is a part of the wall portion of the pipe 21, the core 25 is formed in the reversing portion 20. And the upper outer mold 32 and the lower outer mold 33, which are outer molds, can be prevented from being displaced, and the occurrence of casting defects can be prevented.

また、前記巾木２９を、前記上流側中子２７と下流側中子２８との双方に設けて上流側巾木３９及び下流側巾木４０とするとともに、これらの上流側巾木３９及び下流側巾木４０を前記分割面２６で接合して単一の貫通孔３１に挿入するようにしたことにより、上流側中子２７と下流側中子２８との位置合わせ精度が向上し、鋳造欠陥の発生をさらに防止できるとともに、前記巾木２９を貫通させるために前記吸気通路２４外壁、つまり外側壁部３０に形成される前記貫通孔３１の数を減少させ、生産性を向上させることができる。   Further, the baseboard 29 is provided on both the upstream side core 27 and the downstream side core 28 to form an upstream side baseboard 39 and a downstream side baseboard 40, and these upstream side baseboard 39 and downstream side. Since the side base plate 40 is joined at the dividing surface 26 and inserted into the single through hole 31, the alignment accuracy between the upstream side core 27 and the downstream side core 28 is improved, and a casting defect is caused. Can be further prevented, and the number of the through holes 31 formed in the outer wall of the intake passage 24, that is, the outer wall portion 30, in order to penetrate the baseboard 29 can be reduced, and the productivity can be improved. .

更に、前記貫通孔３１をプラグ４１により閉塞するとともに、このプラグ４１の底面４１ａが前記吸気通路２４側に突出する曲面に形成され、前記プラグ４１の底面４１ａが前記吸気通路２４の内壁部分、つまり外側壁部３０の内壁面４３から前記吸気通路２４内へ突出するよう前記貫通孔３１の軸方向に位置決めされることにより、前記プラグ４１の底面４１ａの外縁部分と貫通孔３１の内周面部分との間に段差が形成されることを防止することができ、前記吸気通路２４の吸気抵抗を低減し得る。   Further, the through hole 31 is closed by a plug 41, and a bottom surface 41a of the plug 41 is formed in a curved surface protruding toward the intake passage 24, and the bottom surface 41a of the plug 41 is an inner wall portion of the intake passage 24, that is, By positioning in the axial direction of the through hole 31 so as to protrude into the intake passage 24 from the inner wall surface 43 of the outer side wall portion 30, the outer edge portion of the bottom surface 41 a of the plug 41 and the inner peripheral surface portion of the through hole 31. Can be prevented from being formed, and the intake resistance of the intake passage 24 can be reduced.

この発明の実施例を示す鋳造にて一体的に吸気マニホルドを形成する際の型構成図である。It is a type | mold block diagram at the time of forming an intake manifold integrally by casting which shows the Example of this invention. エンジンの右側面図である。It is a right view of an engine. エンジンの背面図である。It is a rear view of an engine. 吸気マニホルドの平面図である。It is a top view of an intake manifold. 吸気マニホルドの右側面図である。It is a right view of an intake manifold. 吸気マニホルドの背面図である。It is a rear view of an intake manifold. 貫通孔に挿入したプラグを示す図６のＶＩＩ−ＶＩＩ断面図である。It is VII-VII sectional drawing of FIG. 6 which shows the plug inserted in the through-hole.

符号の説明Explanation of symbols

１ エンジン
６ 吸気マニホルド
７ 排気マニホルド
８ エアクリーナ
９ エアインレットダクト
１０ エアアウトレットホース
１１ 圧力センサ
１２ スロットルボディ
１３ エンジンマウント
１４ オルタネータ
１５ ウォータポンプ
１６ サージタンク
１７ スロットルボディ側取付フランジ
１８ 圧力センサ取付部
１９ 取付フランジ
２０ 反転部
２１ 吸気管
２２ 共鳴室
２３ リブ
２４ 吸気通路
２５ 中子
２６ 分割面
２７ 上流側中子
２８ 下流側中子
２９ 巾木
３０ 外側壁部
３１ 貫通孔
３２ 上側外型
３３ 下側外型
３４、３５、３６ 外壁部
３７ 空間部
３８ 空間部形成用中子
３９ 上流側巾木
４０ 下流側巾木
４１ プラグ
４２ ボス
４３ 内壁面
４４ 隙間 DESCRIPTION OF SYMBOLS 1 Engine 6 Intake manifold 7 Exhaust manifold 8 Air cleaner 9 Air inlet duct 10 Air outlet hose 11 Pressure sensor 12 Throttle body 13 Engine mount 14 Alternator 15 Water pump 16 Surge tank 17 Throttle body side mounting flange 18 Pressure sensor mounting portion 19 Mounting flange 20 Inversion portion 21 Intake pipe 22 Resonance chamber 23 Rib 24 Intake passage 25 Core 26 Dividing surface 27 Upstream core 28 Downstream core 29 Skirting board 30 Outer wall portion 31 Through hole 32 Upper outer mold 33 Lower outer mold 34, 35, 36 Outer wall portion 37 Space portion 38 Space portion forming core 39 Upstream side skirting board 40 Downstream side skirting board 41 Plug 42 Boss 43 Inner wall surface 44 Crevice

Claims (3)

吸気マニホルドのサージタンクをエンジンの気筒列方向に延びるように形成し、このサージタンクから分岐する吸気管を前記エンジンと離れる方向に延出した後反転部で前記エンジンの側に反転させて前記エンジンに取り付けられる取付フランジに連絡するとともに、前記吸気マニホルドを鋳造で一体的に形成するエンジンの吸気装置において、前記サージタンク及び前記吸気通路の内部空間を形成する中子を前記反転部を通る分割面で上流側中子と下流側中子とに分割するとともに、前記上流側中子または前記下流側中子の少なくとも一方の前記反転部に巾木を突出させ、前記吸気通路の外壁に前記巾木を貫通させる貫通孔を形成したことを特徴とするエンジンの吸気装置。   A surge tank of the intake manifold is formed so as to extend in the cylinder row direction of the engine, and an intake pipe branched from the surge tank extends in a direction away from the engine, and is then reversed to the engine side by a reversing unit. In an intake system for an engine in which the intake manifold is integrally formed by casting, and a core that forms an internal space of the surge tank and the intake passage passes through the reversing portion. And splitting it into an upstream core and a downstream core, and projecting a baseboard into at least one of the reversing portions of the upstream core or the downstream core, and the baseboard on the outer wall of the intake passage An air intake device for an engine, characterized in that a through-hole for penetrating the engine is formed. 前記巾木を前記上流側中子と下流側中子との双方に設けるとともに、前記分割面で接合される形状に形成したことを特徴とする請求項１に記載のエンジンの吸気装置。   2. The engine intake device according to claim 1, wherein the baseboard is provided on both of the upstream core and the downstream core and is formed in a shape to be joined on the dividing surface. 前記貫通孔をプラグにより閉塞するとともに、このプラグは底面が前記吸気通路側に突出する曲面に形成され、前記プラグの底面が前記吸気通路の内壁から前記吸気通路内へ突出するよう前記貫通孔の軸方向に位置決めされたことを特徴とする請求項１に記載のエンジンの吸気装置。   The through-hole is closed by a plug, and the plug has a bottom surface formed into a curved surface protruding toward the intake passage, and the bottom surface of the plug protrudes from the inner wall of the intake passage into the intake passage. The engine intake device according to claim 1, wherein the intake device is positioned in an axial direction.
JP2005251522A 2005-08-31 2005-08-31 Intake device of engine Pending JP2007064109A (en)

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JP2005251522A JP2007064109A (en) 2005-08-31 2005-08-31 Intake device of engine

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Publication Number Publication Date
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Family

ID=37926594

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Country Link
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