JP2007100614A - Mounting structure for egr cooler - Google Patents

Mounting structure for egr cooler Download PDF

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JP2007100614A
JP2007100614A JP2005292737A JP2005292737A JP2007100614A JP 2007100614 A JP2007100614 A JP 2007100614A JP 2005292737 A JP2005292737 A JP 2005292737A JP 2005292737 A JP2005292737 A JP 2005292737A JP 2007100614 A JP2007100614 A JP 2007100614A
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egr cooler
mounting
mounting bracket
egr
spherical
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Isao Abe
功 阿部
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UD Trucks Corp
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UD Trucks Corp
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    • 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

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a mounting structure for an EGR cooler relaxing mounting stress by absorbing assembly error in every directions generated at a time of mounting the EGR cooler. <P>SOLUTION: In claim 1, a pair of spherical surface washers having a mounting bracket side abutment surface worked in a spherical surface is used for bolt fastening of the EGR cooler and a mounting bracket in the mounting structure for the EGR cooler mounting the EGR cooler on an EGR cooler mounting part via a mounting bracket by fastening the mounting bracket between the EGR cooler and EGR cooler mounting part by bolts. In claim 2, a pair of spherical surface washers having a mounting bracket side abutment surface worked in a spherical surface is used for bolt fastening of the EGR cooler mounting part and the mounting bracket in the mounting structure for the EGR cooler mentioned in the claim 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ディーゼルエンジンのＥＧＲ装置に用いるＥＧＲクーラーの取付構造に関する。   The present invention relates to an EGR cooler mounting structure used in an EGR device for a diesel engine.

ディーゼルエンジン（以下、「エンジン」という）の燃焼時に発生する窒素酸化物（ＮＯX ）を低減するため、排ガスの一部をエンジンの吸気系に排気還流（以下、「ＥＧＲ」という）させるＥＧＲ装置が知られている。
窒素酸化物は、高温の排ガスのもとで空気中の酸素と窒素が反応して生成されるため、ＥＧＲ装置は、ＥＧＲによって燃焼温度を下げることでＯ2＋Ｎ2→２ＮＯの反応を抑制して窒素酸化物の生成を低減させるものである。 In order to reduce nitrogen oxides (NO x ) generated during combustion of a diesel engine (hereinafter referred to as “engine”), an EGR device that recirculates exhaust gas (hereinafter referred to as “EGR”) to the engine intake system. It has been known.
Since nitrogen oxides are produced by the reaction of oxygen and nitrogen in the air under high temperature exhaust gas, the EGR device suppresses the reaction of O 2 + N 2 → 2NO by lowering the combustion temperature with EGR. This reduces the generation of nitrogen oxides.

そして、吸気系にＥＧＲさせるＥＧＲガスの温度を下げるほど、燃焼時のスモークの悪化を抑え、窒素酸化物の発生が減少することが知られている。
そこで、今日では、特許文献１〜３に開示されるように、エンジンの吸気系と排気系との間に接続したＥＧＲパイプにエンジン冷却水等を冷媒とするＥＧＲクーラーを装着し、ＥＧＲパイプを流下するＥＧＲガスをこのＥＧＲクーラーで冷却して、ＥＧＲガス温度を下げる方法が広く採用されている。 It is known that as the temperature of the EGR gas to be EGRed into the intake system is lowered, the deterioration of smoke during combustion is suppressed and the generation of nitrogen oxides is reduced.
Therefore, today, as disclosed in Patent Documents 1 to 3, an EGR cooler that uses engine coolant or the like as a refrigerant is attached to an EGR pipe connected between the intake system and the exhaust system of the engine, and the EGR pipe is A method in which the EGR gas flowing down is cooled by the EGR cooler to lower the EGR gas temperature is widely adopted.

図３は特許文献２に開示されたＥＧＲクーラーを示し、このＥＧＲクーラー１は、円筒状に成形されたシェル３内に、その長手方向に沿って複数の薄板チューブ５を収容し、シェル３のＥＧＲガス流入側端部とＥＧＲガス流出側端部に取り付くディフューザ７，９に、ＥＧＲガス導入パイプ（ＥＧＲパイプ）１１とＥＧＲガス導出パイプ（ＥＧＲパイプ）１３を接続すると共に、ＥＧＲガス導入パイプ１１側のシェル３の周壁に冷却水導入パイプ１５を接続し、ＥＧＲガス導出パイプ１３側のシェル３の周壁に冷却水導出パイプ１７を接続したもので、各チューブ５は、シェル３の両端部を閉塞するエンドプレート１９に挿着されて両ディフューザ７，９内に開口している。   FIG. 3 shows an EGR cooler disclosed in Patent Document 2. The EGR cooler 1 accommodates a plurality of thin plate tubes 5 along the longitudinal direction in a cylindrical shell 3. An EGR gas introduction pipe (EGR pipe) 11 and an EGR gas lead-out pipe (EGR pipe) 13 are connected to the diffusers 7 and 9 attached to the EGR gas inflow side end and the EGR gas outflow side end, and the EGR gas introduction pipe 11 A cooling water inlet pipe 15 is connected to the peripheral wall of the shell 3 on the side, and a cooling water outlet pipe 17 is connected to the peripheral wall of the shell 3 on the EGR gas outlet pipe 13 side. It is inserted into the closing end plate 19 and opened in both diffusers 7 and 9.

而して、斯かる構造によって、シェル３内には、冷却水導入パイプ１５から冷却水導出パイプ１７に至る冷却水流路が形成されると共に、ＥＧＲガス導入パイプ１１からチューブ５を経てＥＧＲガス導出パイプ１３に至るＥＧＲガス流路が形成されており、ＥＧＲクーラー１内に導入されたＥＧＲガスＧがチューブ５内を流下する際に、シェル３内に流入した冷却水Ｗで熱交換されてＥＧＲガス温度が下がるようになっている。   Thus, with this structure, a cooling water flow path from the cooling water introduction pipe 15 to the cooling water extraction pipe 17 is formed in the shell 3, and the EGR gas is extracted from the EGR gas introduction pipe 11 through the tube 5. An EGR gas flow path leading to the pipe 13 is formed, and when the EGR gas G introduced into the EGR cooler 1 flows down in the tube 5, heat is exchanged with the cooling water W flowing into the shell 3, and EGR The gas temperature is lowered.

そして、図４はＥＧＲクーラーの取付構造を示し、図中、２１はＥＧＲクーラー２３のディフューザ２５に一体成形された取付用フランジ、２７は図示しないエンジンのシリンダヘッドに固着されたベース部材（ＥＧＲクーラー取付部）で、ＥＧＲクーラー２３は、取付用フランジ２１，ベース部材２７間に取付ブラケット２９をボルト締めしてシリンダヘッドに取り付けられている。   4 shows an EGR cooler mounting structure. In the figure, 21 is a mounting flange integrally formed with the diffuser 25 of the EGR cooler 23, 27 is a base member (EGR cooler) fixed to an engine cylinder head (not shown). The EGR cooler 23 is attached to the cylinder head by bolting a mounting bracket 29 between the mounting flange 21 and the base member 27.

その他、図中、３１はディフューザ２５に接続したＥＧＲガス導入パイプ（ＥＧＲパイプ）、３３，３５は取付ボルトと平ワッシャで、取付用フランジ２１とベース部材２７のボルト取付孔３７，３９の内周が螺刻されている。
そして、図示しないがＥＧＲクーラー２３の他端側も、同様に取付ブラケットとベース部材，取付用フランジを介してシリンダヘッドに連結されている。
特開２００３−７４４１７号公報 特開２００３−８３１７４号公報 特開２００２−３０９９４号公報 In addition, in the figure, 31 is an EGR gas introduction pipe (EGR pipe) connected to the diffuser 25, 33 and 35 are mounting bolts and flat washers, and inner circumferences of the mounting flange 21 and bolt mounting holes 37 and 39 of the base member 27. Is threaded.
Although not shown, the other end side of the EGR cooler 23 is similarly connected to the cylinder head via a mounting bracket, a base member, and a mounting flange.
JP 2003-74417 A JP 2003-83174 A JP 2002-30994 A

ところで、従来、エンジンの吸気系と排気系には組付誤差があるため、図４の如くこれらの間にＥＧＲクーラー２３を取り付けた場合、ＥＧＲクーラー２３の取り付けにバラツキが生じてＥＧＲクーラー２３に組付誤差が発生しており、この組付誤差を吸収しないと、取付ボルト３３の締め付けに伴い、取付応力が過大になってしまう。
そして、ＥＧＲクーラー内の薄板チューブには、排ガスの流下に伴う膨張，収縮によって変動応力がかかることとなる。そのため、エンドプレートとの取付部には、取付応力に変動応力が加わり、更に大きな応力となる虞がある。 Conventionally, there is an assembly error between the intake system and the exhaust system of the engine. Therefore, when the EGR cooler 23 is attached between them as shown in FIG. An assembly error has occurred. If this assembly error is not absorbed, the mounting stress becomes excessive as the mounting bolt 33 is tightened.
The thin plate tube in the EGR cooler is subjected to fluctuating stress due to expansion and contraction accompanying the flow of the exhaust gas. For this reason, the attachment portion with the end plate may be subjected to a variable stress in addition to the attachment stress, resulting in a larger stress.

そこで、従来では、図４に示すように取付ボルト３３が挿通する取付ブラケット２９のボルト挿通孔４１をバカ孔にしてＥＧＲクーラー２３の組付誤差を吸収している。
しかし、この取付構造では、ＥＧＲクーラー２３の上下方向や左右方向へのズレは吸収できるものの、例えばＥＧＲクーラーが上下方向や左右方向へ傾いたような場合、この組付誤差（ズレ）を吸収することができないのが実情で、あらゆる方向の組付誤差を吸収することができない。 Therefore, conventionally, as shown in FIG. 4, the bolt insertion hole 41 of the mounting bracket 29 through which the mounting bolt 33 is inserted is used as a hole to absorb the assembly error of the EGR cooler 23.
However, although this mounting structure can absorb the deviation of the EGR cooler 23 in the vertical direction and the horizontal direction, for example, when the EGR cooler is inclined in the vertical direction and the horizontal direction, this assembly error (deviation) is absorbed. In reality, it is impossible to absorb assembly errors in all directions.

本発明は斯かる実情に鑑み案出されたもので、ＥＧＲクーラーの取付時に生じるあらゆる方向の組付誤差を吸収して、取付応力の緩和を図ったＥＧＲクーラーの取付構造を提供することを目的とする。   The present invention has been devised in view of such a situation, and an object of the present invention is to provide an EGR cooler mounting structure that absorbs assembling errors in all directions that occur during the mounting of an EGR cooler and reduces mounting stress. And

斯かる目的を達成するため、請求項１に係る発明は、ＥＧＲクーラーとＥＧＲクーラー取付部との間に取付ブラケットをボルト締めし、当該取付ブラケットを介してＥＧＲクーラーをＥＧＲクーラー取付部に取り付けるＥＧＲクーラーの取付構造に於て、上記ＥＧＲクーラーと取付ブラケットのボルト締結に、取付ブラケット側当接面を球面加工した一対の球面ワッシャを用いたことを特徴とする。   In order to achieve such an object, the invention according to claim 1 is an EGR in which a mounting bracket is bolted between an EGR cooler and an EGR cooler mounting portion, and the EGR cooler is mounted on the EGR cooler mounting portion via the mounting bracket. The cooler mounting structure is characterized in that a pair of spherical washers whose mounting bracket side contact surfaces are processed into a spherical shape are used for fastening the bolts between the EGR cooler and the mounting bracket.

そして、請求項２に係る発明は、請求項１に記載のＥＧＲクーラーの取付構造に於て、ＥＧＲクーラー取付部と取付ブラケットのボルト締結に、取付ブラケット側当接面を球面加工した一対の球面ワッシャを用いたことを特徴とし、請求項３に係る発明は、請求項１または請求項２に記載のＥＧＲクーラーの取付構造に於て、取付ブラケットは、ボルト締結部が球面ワッシャに沿って凹状に球面加工されていることを特徴とする。   The invention according to claim 2 is the EGR cooler mounting structure according to claim 1, wherein the mounting bracket side abutting surface is processed into a spherical surface for fastening the bolts of the EGR cooler mounting portion and the mounting bracket. A washer is used, and the invention according to claim 3 is the mounting structure of the EGR cooler according to claim 1 or 2, wherein the mounting bracket has a bolt fastening portion that is concave along the spherical washer. It is characterized by being spherically processed.

請求項１及び請求項３に係る発明によれば、ＥＧＲクーラーの取付時に生じる組付誤差を確実に吸収することができるため、従来に比し取付応力を軽減することが可能となって、長期に亘りＥＧＲクーラーを良好に使用することができる利点を有する。
また、請求項２に係る発明によれば、ＥＧＲクーラーの取付時に生じる組付誤差をより確実に吸収することが可能となって、取付応力を更に軽減することが可能となる。 According to the inventions according to claim 1 and claim 3, since it is possible to reliably absorb the assembly error that occurs when the EGR cooler is mounted, it is possible to reduce the mounting stress as compared with the conventional case, and the long-term Thus, the EGR cooler can be used satisfactorily.
Moreover, according to the invention which concerns on Claim 2, it becomes possible to absorb the assembly | attachment error produced at the time of attachment of an EGR cooler more reliably, and it becomes possible to further reduce attachment stress.

以下、本発明の実施形態を図面に基づいて詳細に説明する。
図１は請求項１及び請求項３の一実施形態に係るＥＧＲクーラーの取付構造を示し、図中、５１はＥＧＲクーラーで、本実施形態のＥＧＲクーラー５１も、図３のＥＧＲクーラー１と同様、円筒状に成形されたシェル５３のＥＧＲガス流入側端部とＥＧＲガス流出側端部にディフューザ５５が取り付き、これらにＥＧＲガス導入パイプ（ＥＧＲパイプ）５７とＥＧＲガス導出パイプ（ＥＧＲパイプ）が接続されている。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 shows an EGR cooler mounting structure according to an embodiment of claims 1 and 3, wherein 51 is an EGR cooler, and the EGR cooler 51 of this embodiment is the same as the EGR cooler 1 of FIG. The diffuser 55 is attached to the EGR gas inflow side end and the EGR gas outflow side end of the cylindrical shell 53, and an EGR gas introduction pipe (EGR pipe) 57 and an EGR gas outlet pipe (EGR pipe) are attached to these. It is connected.

そして、シェル５３の周壁に冷却水導入パイプ５９と冷却水導出パイプが接続され、また、シェル５３内には、シェル５３の両端部を閉塞する左右のエンドプレート間に複数本のチューブが挿着されて、冷却水導入パイプ５９から冷却水導出パイプに至る冷却水流路が形成されると共に、ＥＧＲガス導入パイプ５７からチューブを経てＥＧＲガス導出パイプに至るＥＧＲガス流路が形成されている。   A cooling water introduction pipe 59 and a cooling water outlet pipe are connected to the peripheral wall of the shell 53, and a plurality of tubes are inserted into the shell 53 between the left and right end plates that close both ends of the shell 53. Thus, a cooling water flow path from the cooling water introduction pipe 59 to the cooling water outlet pipe is formed, and an EGR gas passage from the EGR gas introduction pipe 57 through the tube to the EGR gas outlet pipe is formed.

また、図中、６１はディフューザ５５に一体成形された取付用フランジ、６３は図示しないエンジンのシリンダヘッドに固着されたベース部材（ＥＧＲクーラー取付部）で、図４の従来例と同様、本実施形態も、取付用フランジ６１，ベース部材６３間に取付ブラケット６５をボルト締めしてＥＧＲクーラー５１をシリンダヘッドに取り付けているが、本実施形態は、ＥＧＲクーラー５１と取付ブラケット６５のボルト締結に一対の球面ワッシャ６７を用いたことを特徴とする。   In the figure, 61 is a mounting flange integrally formed with the diffuser 55, 63 is a base member (EGR cooler mounting portion) fixed to a cylinder head of an engine (not shown), and this embodiment is similar to the conventional example of FIG. In the configuration, the mounting bracket 65 is bolted between the mounting flange 61 and the base member 63 to attach the EGR cooler 51 to the cylinder head. However, in this embodiment, the EGR cooler 51 and the mounting bracket 65 are paired with bolts. The spherical washer 67 is used.

図１及び図２に示すように球面ワッシャ６７は図４のワッシャ３５に比し肉厚で、取付ブラケット側当接面６９を球面加工した平面視円形形状をなし、その中央に取付ボルト７１のボルト挿通孔７３が設けられている。
一方、一対の球面ワッシャ６７の取付ブラケット側当接面６９が当接する取付ブラケット６５の表裏のボルト締結部には、当該取付ブラケット側当接面６９に沿って、夫々、球面状にワッシャ当接面７５が加工されており、その中央にボルト挿通孔７７がバカ孔として設けられている。そして、図１に示すように、一対の球面ワッシャ６７のボルト挿通孔７１と取付ブラケット６５のボルト挿通孔７７に取付ボルト７１を挿通させて、その先端側を、内周が螺刻された取付用フランジ６１のボルト取付孔７９に螺着すると、取付ブラケット２９がＥＧＲクーラー２３の取付用フランジ６１に固着されるようになっている。 As shown in FIGS. 1 and 2, the spherical washer 67 is thicker than the washer 35 of FIG. 4 and has a circular shape in plan view in which the mounting bracket side abutting surface 69 is processed into a spherical shape. Bolt insertion holes 73 are provided.
On the other hand, the bolt fastening portions on the front and back of the mounting bracket 65 with which the mounting bracket side contact surfaces 69 of the pair of spherical washers 67 contact each other are in a spherical shape along the mounting bracket side contact surface 69. The surface 75 is machined, and a bolt insertion hole 77 is provided as a fool hole in the center thereof. Then, as shown in FIG. 1, the mounting bolt 71 is inserted through the bolt insertion hole 71 of the pair of spherical washers 67 and the bolt insertion hole 77 of the mounting bracket 65, and the tip end side thereof is screwed on the inner periphery. When screwed into the bolt mounting hole 79 of the flange 61 for mounting, the mounting bracket 29 is fixed to the mounting flange 61 of the EGR cooler 23.

これに対し、取付ブラケット６５とベース部材６３のボルト締結は、図４の従来例と同一構造で、取付ブラケット６５にボルト挿通孔８１がバカ孔として設けられ、ベース部材６３には内周が螺刻されたボルト取付孔８３が設けられている。そして、取付ボルト７１をボルト挿通孔８１に挿通させて、その先端側をボルト取付孔８３に螺着すると、取付ブラケット２９がベース部材６３にボルト締結されるようになっており、このボルト締結部では、従来と同様、一対の平ワッシャ８５が使用されている。   On the other hand, the bolt fastening between the mounting bracket 65 and the base member 63 has the same structure as the conventional example of FIG. 4, the bolt insertion hole 81 is provided in the mounting bracket 65 as a fool hole, and the inner periphery of the base member 63 is screwed. An engraved bolt mounting hole 83 is provided. Then, when the mounting bolt 71 is inserted into the bolt insertion hole 81 and the tip end side is screwed into the bolt mounting hole 83, the mounting bracket 29 is bolted to the base member 63, and this bolt fastening portion Then, like a conventional case, a pair of flat washers 85 are used.

そして、図示しないがＥＧＲクーラー５１の他端側（ＥＧＲガス流出側）も、同様に上述の如き構造からなる取付ブラケットとベース部材，フランジ，球面ワッシャ，平ワッシャ，取付ボルト等を用いてシリンダヘッドに取り付けられている。
本実施形態はこのように構成されているから、エンジンの吸，排気系間に、ＥＧＲクーラー５１が取り付くＥＧＲガス導入パイプ５７とＥＧＲガス導出パイプを接続して、取付用フランジ６１，ベース部材６３間に取付ブラケット６５をボルト締めすれば、ＥＧＲクーラー５１がシリンダヘッドに取り付くこととなる。 Although not shown, the other end side (EGR gas outflow side) of the EGR cooler 51 is also a cylinder head using a mounting bracket and a base member, a flange, a spherical washer, a flat washer, a mounting bolt and the like having the same structure as described above. Is attached.
Since the present embodiment is configured as described above, the EGR gas introduction pipe 57 and the EGR gas outlet pipe to which the EGR cooler 51 is attached are connected between the intake and exhaust systems of the engine, and the mounting flange 61 and the base member 63 are connected. If the mounting bracket 65 is bolted in between, the EGR cooler 51 is attached to the cylinder head.

そして、既述したように本実施形態は、取付ブラケット６１とベース部材６３のボルト挿通孔７７，８１を夫々バカ孔にすると共に、ＥＧＲクーラー５１と取付ブラケット６５のボルト締結に一対の球面ワッシャ６７を用い、更に球面ワッシャ６７の取付ブラケット側当接面６９が当接する取付ブラケット６５の表裏のボルト締結部に、当該取付ブラケット側当接面６９に沿った球面状のワッシャ当接面７５を設けたので、図２に示すようにＥＧＲクーラー５１の取付時に生じるあらゆる方向のズレに応じ、球面ワッシャ６７がワッシャ当接面７５に沿って移動して組付誤差が吸収されることとなる。   As described above, according to the present embodiment, the bolt insertion holes 77 and 81 of the mounting bracket 61 and the base member 63 are made to be fool holes, and a pair of spherical washers 67 are used for fastening the bolts of the EGR cooler 51 and the mounting bracket 65. Further, a spherical washer contact surface 75 along the mounting bracket side contact surface 69 is provided at the bolt fastening portion on the front and back of the mounting bracket 65 on which the mounting bracket side contact surface 69 of the spherical washer 67 contacts. Therefore, as shown in FIG. 2, the spherical washer 67 moves along the washer abutting surface 75 according to the displacement in any direction that occurs when the EGR cooler 51 is attached, and the assembly error is absorbed.

このように、本実施形態に係るＥＧＲクーラー５１の取付構造によれば、ＥＧＲクーラー５１の取付時に生じる組付誤差を確実に吸収することができるため、従来に比し取付応力を軽減することが可能となって、長期に亘りＥＧＲクーラー５１を良好に使用することができる利点を有する。
尚、上記実施形態では、取付ブラケット６５とベース部材６３のボルト締結を図４の従来例と同一構造としたが、この部位のボルト締結にも、平ワッシャ８５に代えて、上記実施形態と同様、一対の球面ワッシャ６７を用いた取付構造を用いてもよく、この請求項２の実施形態によれば、ＥＧＲクーラー５１の取付時に生じる組付誤差をより確実に吸収することが可能となって、取付応力を更に軽減することが可能となる。 As described above, according to the mounting structure of the EGR cooler 51 according to the present embodiment, it is possible to reliably absorb the assembly error that occurs when the EGR cooler 51 is mounted. This has the advantage that the EGR cooler 51 can be used satisfactorily over a long period of time.
In the above embodiment, the bolt fastening of the mounting bracket 65 and the base member 63 has the same structure as the conventional example of FIG. 4, but the bolt fastening of this portion is the same as the above embodiment in place of the flat washer 85. An attachment structure using a pair of spherical washers 67 may be used, and according to the embodiment of claim 2, it is possible to more reliably absorb an assembly error that occurs when the EGR cooler 51 is attached. The mounting stress can be further reduced.

請求項１及び請求項３の一実施形態に係るＥＧＲクーラーの取付構造の要部切欠き正面図である。It is a principal part notched front view of the attachment structure of the EGR cooler which concerns on one Embodiment of Claim 1 and Claim 3. 図１に示す取付構造の要部拡大断面図である。It is a principal part expanded sectional view of the attachment structure shown in FIG. ＥＧＲクーラーの断面図である。It is sectional drawing of an EGR cooler. 従来のＥＧＲクーラーの取付構造の要部切欠き正面図である。It is a principal part notched front view of the attachment structure of the conventional EGR cooler.

符号の説明Explanation of symbols

５１ ＥＧＲクーラー
５３ シェル
５５ ディフューザ
５７ ＥＧＲガス導入パイプ（ＥＧＲパイプ）
５９ 冷却水導入パイプ
６１ 取付用フランジ
６３ ベース部材（ＥＧＲクーラー取付部）
６５ 取付ブラケット
６７ 球面ワッシャ
６９ 取付ブラケット側当接面
７１ 取付ボルト
７３，７７，８１ ボルト挿通孔
７５ ワッシャ当接面
７９，８３ ボルト取付孔
８５ 平ワッシャ
51 EGR cooler 53 Shell 55 Diffuser 57 EGR gas introduction pipe (EGR pipe)
59 Cooling water introduction pipe 61 Mounting flange 63 Base member (EGR cooler mounting part)
65 Mounting bracket 67 Spherical washer 69 Mounting bracket-side contact surface 71 Mounting bolt 73, 77, 81 Bolt insertion hole 75 Washer contact surface 79, 83 Bolt mounting hole 85 Flat washer

Claims (3)

ＥＧＲクーラーとＥＧＲクーラー取付部との間に取付ブラケットをボルト締めし、当該取付ブラケットを介してＥＧＲクーラーをＥＧＲクーラー取付部に取り付けるＥＧＲクーラーの取付構造に於て、
上記ＥＧＲクーラーと取付ブラケットのボルト締結に、取付ブラケット側当接面を球面加工した一対の球面ワッシャを用いたことを特徴とするＥＧＲクーラーの取付構造。 In the mounting structure of the EGR cooler, the mounting bracket is bolted between the EGR cooler and the EGR cooler mounting portion, and the EGR cooler is mounted to the EGR cooler mounting portion via the mounting bracket.
A mounting structure for an EGR cooler, wherein a pair of spherical washers whose mounting bracket side contact surfaces are processed into a spherical shape are used for fastening the bolts between the EGR cooler and the mounting bracket. ＥＧＲクーラー取付部と取付ブラケットのボルト締結に、取付ブラケット側当接面を球面加工した一対の球面ワッシャを用いたことを特徴とする請求項１に記載のＥＧＲクーラーの取付構造。   2. The EGR cooler mounting structure according to claim 1, wherein a pair of spherical washers with a spherical surface on the mounting bracket side contact surface are used for fastening the bolts between the EGR cooler mounting portion and the mounting bracket. 取付ブラケットは、ボルト締結部が球面ワッシャに沿って凹状に球面加工されていることを特徴とする請求項１または請求項２に記載のＥＧＲクーラーの取付構造。
The mounting structure of the EGR cooler according to claim 1 or 2, wherein the mounting bracket has a bolt fastening portion that is spherically processed along a spherical washer.
JP2005292737A 2005-10-05 2005-10-05 Mounting structure for egr cooler Withdrawn JP2007100614A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005292737A JP2007100614A (en) 2005-10-05 2005-10-05 Mounting structure for egr cooler

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019183726A (en) * 2018-04-09 2019-10-24 トヨタ自動車株式会社 EGR device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019183726A (en) * 2018-04-09 2019-10-24 トヨタ自動車株式会社 EGR device
JP7000969B2 (en) 2018-04-09 2022-01-19 トヨタ自動車株式会社 EGR device

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