JP6988561B2 - Cooling water flow path of internal combustion engine - Google Patents

Cooling water flow path of internal combustion engine Download PDF

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JP6988561B2
JP6988561B2 JP2018031530A JP2018031530A JP6988561B2 JP 6988561 B2 JP6988561 B2 JP 6988561B2 JP 2018031530 A JP2018031530 A JP 2018031530A JP 2018031530 A JP2018031530 A JP 2018031530A JP 6988561 B2 JP6988561 B2 JP 6988561B2
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cooling water
lid member
outlet
flow path
water flow
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JP2019148173A (en
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慶 遠藤
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Toyota Motor Corp
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本発明は、内燃機関の冷却水流路に関する。 The present invention relates to a cooling water flow path of an internal combustion engine.

エンジンの冷却水をオイルクーラにより冷却することが行われている（例えば、特許文献１）。 The cooling water of the engine is cooled by an oil cooler (for example, Patent Document 1).

特開２０１７−８９５８６号公報Japanese Unexamined Patent Publication No. 2017-89586

冷却水が流れる冷却水流路は、オイルクーラへ冷却水を流出させるための流出口を有している。しかしながら、オイルクーラを備えない車両においては、冷却水をオイルクーラへ流出させる必要がないため、当該流出口を蓋部材で塞ぐことが考えられる。このとき、蓋部材を表裏逆に取り付けると、蓋部材をプレス加工した際に生じるダレがガスケットのビードにかかってしまったり、正常取り付け時に流出口側となる面の反対側の面の加工精度が流出口側となる面よりも低い（例えば、表面が粗い）こと等によって、ガスケットによるシール効果が十分に得られず冷却水が流出口より外部に漏れ出すおそれがある。しかしながら、この冷却水の漏れは徐々に起こるため、車両の製造過程で蓋部材の誤取り付けを発見することが難しい。 The cooling water flow path through which the cooling water flows has an outlet for flowing the cooling water to the oil cooler. However, in a vehicle not provided with an oil cooler, it is not necessary to let the cooling water flow out to the oil cooler, so that it is conceivable to block the outlet with a lid member. At this time, if the lid member is mounted upside down, the sagging generated when the lid member is pressed may be applied to the bead of the gasket, or the machining accuracy of the surface opposite to the outlet side surface during normal mounting may be improved. If the surface is lower than the surface on the outlet side (for example, the surface is rough), the sealing effect of the gasket may not be sufficiently obtained and the cooling water may leak to the outside from the outlet. However, since this cooling water leak occurs gradually, it is difficult to detect the misattachment of the lid member in the manufacturing process of the vehicle.

そこで、本明細書開示の内燃機関の冷却水流路は、冷却水の流出口を塞ぐ蓋部材の誤取り付けを発見すること課題とする。 Therefore, in the cooling water flow path of the internal combustion engine disclosed in the present specification, it is an object to find the erroneous attachment of the lid member that blocks the outlet of the cooling water.

かかる課題を解決するために、本明細書に開示された内燃機関の冷却水流路は、オイルクーラへ冷却水を流出させるために設けられた流出口を覆う蓋部材を備える、内燃機関の冷却水流路であって、前記蓋部材は、前記蓋部材をガスケットを介して前記流出口に正しく取り付けた場合に前記流出口側となる面の反対側の面に溝を有し、前記溝は、前記蓋部材を前記ガスケットを介して前記流出口に誤って取り付けた場合に、前記ガスケットが有するビードと交差するように設けられる、冷却水流路である。 In order to solve such a problem, the cooling water flow path of the internal combustion engine disclosed in the present specification includes a lid member covering an outlet provided for letting the cooling water flow out to the oil cooler. The lid member has a groove on the surface opposite to the surface that becomes the outlet side when the lid member is correctly attached to the outlet via a gasket, and the groove is the groove. A cooling water flow path provided so as to intersect the bead of the gasket when the lid member is erroneously attached to the outlet via the gasket.

本明細書開示の内燃機関の冷却水流路によれば、冷却水の流出口を塞ぐ蓋部材の誤取り付けを発見することができる。 According to the cooling water flow path of the internal combustion engine disclosed in the present specification, it is possible to detect the erroneous attachment of the lid member that blocks the outlet of the cooling water.

図１（Ａ）は、車両がオイルクーラを備える場合の冷却水の流通経路を説明する図であり、図１（Ｂ）は、車両がオイルクーラを備えない場合の冷却水の流通経路を説明する図である。FIG. 1 (A) is a diagram for explaining a cooling water flow path when the vehicle is equipped with an oil cooler, and FIG. 1 (B) is a diagram for explaining a cooling water flow path when the vehicle is not equipped with an oil cooler. It is a figure to do. 図２（Ａ）は、蓋部材を正しく取り付けた場合に、流出口側となる面を示す正面図であり、図２（Ｂ）は、蓋部材を誤って取り付けた場合に、流出口側となる面を示す図である。FIG. 2A is a front view showing a surface that becomes the outlet side when the lid member is correctly attached, and FIG. 2B is a front view showing the outlet side when the lid member is incorrectly attached. It is a figure which shows the surface. 図３（Ａ）は、蓋部材を正しく取り付けた場合の正面図であり、図３（Ｂ）は、図３（Ａ）のＡ−Ａ線の断面図である。FIG. 3A is a front view when the lid member is correctly attached, and FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A. 図４（Ａ）は、蓋部材を誤って取り付けた場合の正面図であり、図４（Ｂ）は、図４（Ａ）のＡ−Ａ線の断面図である。4 (A) is a front view when the lid member is erroneously attached, and FIG. 4 (B) is a cross-sectional view taken along the line AA of FIG. 4 (A).

以下、本発明の実施形態について、添付図面を参照しつつ説明する。ただし、図面中、各部の寸法、比率等は、実際のものと完全に一致するようには図示されていない場合がある。また、図面によっては細部が省略されて描かれている場合もある。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, in the drawings, the dimensions, ratios, etc. of each part may not be shown so as to completely match the actual ones. Also, depending on the drawing, details may be omitted.

図１（Ａ）〜図４（Ｂ）を参照し、一実施形態に係る内燃機関の冷却水流路１０について説明する。 The cooling water flow path 10 of the internal combustion engine according to the embodiment will be described with reference to FIGS. 1 (A) to 4 (B).

図１（Ａ）及び図１（Ｂ）は、内燃機関としてのエンジン５０の冷却水の流通経路を説明する図である。エンジン５０は、シリンダブロック２００と、シリンダブロック２００の上部に配置されたシリンダヘッド１００とを備える。シリンダブロック２００及びシリンダヘッド１００内には、冷却水が流通する冷却水流路１０が形成されている。 1 (A) and 1 (B) are diagrams illustrating a flow path of cooling water of an engine 50 as an internal combustion engine. The engine 50 includes a cylinder block 200 and a cylinder head 100 arranged above the cylinder block 200. A cooling water flow path 10 through which cooling water flows is formed in the cylinder block 200 and the cylinder head 100.

冷却水は、ウォータポンプ６０から吐出された後、シリンダブロック２００及びシリンダヘッド１００内の冷却水流路１０を流通する。シリンダヘッド１００及びシリンダブロック２００から排出された冷却水は、互いに合流して、ラジエータ７０等を介してウォータポンプ６０に戻る。また、車両がオイルクーラを備える場合、冷却水流路１０に設けられている流出口１３を介し、冷却水がオイルクーラ８０に導入される。オイルクーラ８０に導入された冷却水は、オイルクーラ８０内の冷却水流路を流通した後、ウォータポンプ６０に戻る。冷却水がシリンダブロック２００及びシリンダヘッド１００内の冷却水流路１０を流通することによりエンジン５０が冷却される。 After being discharged from the water pump 60, the cooling water flows through the cooling water flow path 10 in the cylinder block 200 and the cylinder head 100. The cooling water discharged from the cylinder head 100 and the cylinder block 200 merges with each other and returns to the water pump 60 via the radiator 70 and the like. When the vehicle is equipped with an oil cooler, the cooling water is introduced into the oil cooler 80 via the outlet 13 provided in the cooling water flow path 10. The cooling water introduced into the oil cooler 80 flows back through the cooling water flow path in the oil cooler 80 and then returns to the water pump 60. The engine 50 is cooled by the cooling water flowing through the cooling water flow path 10 in the cylinder block 200 and the cylinder head 100.

ところで、図１（Ｂ）に示すように、車両がオイルクーラを備えていない場合、オイルクーラ８０に冷却水を導入する必要がないため、流出口１３を蓋部材１５で塞ぐことが考えられる。 By the way, as shown in FIG. 1 (B), when the vehicle is not equipped with the oil cooler, it is not necessary to introduce the cooling water into the oil cooler 80, so that it is conceivable that the outlet 13 is closed with the lid member 15.

ここで、蓋部材１５の構成について説明する。図２（Ａ）は、蓋部材１５が正しく取り付けられた場合に、流出口１３側となる面を示す図であり、図２（Ｂ）は、蓋部材１５が誤って取り付けられた場合に流出口１３側となる面を示す図である。すなわち、図２（Ｂ）は、蓋部材１５を正しく取り付けた場合に流出口１３側となる面の反対側の面を示している。図２（Ａ）及び図２（Ｂ）から明らかなように、蓋部材１５は線Ｂについて線対称な形状を有しており、裏表の判別がつきにくい。 Here, the configuration of the lid member 15 will be described. FIG. 2A is a diagram showing a surface on the outlet 13 side when the lid member 15 is correctly attached, and FIG. 2B is a diagram showing a flow when the lid member 15 is erroneously attached. It is a figure which shows the surface which becomes the exit 13 side. That is, FIG. 2B shows a surface opposite to the surface that becomes the outlet 13 side when the lid member 15 is correctly attached. As is clear from FIGS. 2A and 2B, the lid member 15 has a shape that is axisymmetric with respect to the line B, and it is difficult to distinguish between the front and back sides.

このとき、蓋部材１５を表裏逆に取り付けると、蓋部材１５をプレス加工した際に生じるダレがガスケットのビードにかかってしまったり、正常取り付け時に流出口１３側となる面の反対側の面の加工精度が流出口１３側となる面よりも低い（例えば、表面が粗い）こと等によって、ガスケットによるシール効果が十分に得られず冷却水が流出口１３より外部に漏れ出すおそれがある。しかしながら、この冷却水の漏れは徐々に起こるため、車両の製造過程で蓋部材１５の誤取り付けを発見することは難しい。 At this time, if the lid member 15 is attached upside down, the sagging generated when the lid member 15 is pressed may be caught by the bead of the gasket, or the surface opposite to the surface that becomes the outlet 13 side at the time of normal attachment. Since the processing accuracy is lower than the surface on the outlet 13 side (for example, the surface is rough), the sealing effect of the gasket may not be sufficiently obtained and the cooling water may leak to the outside from the outlet 13. However, since the leakage of the cooling water occurs gradually, it is difficult to detect the misattachment of the lid member 15 in the manufacturing process of the vehicle.

そこで、本実施形態の蓋部材１５では、蓋部材１５を誤って取り付けた場合に、冷却水を意図的にリークさせて、蓋部材１５の誤取り付けを発見できるようにしている。具体的には、蓋部材１５において、図２（Ｂ）に示すように、蓋部材１５が誤って取り付けられた場合に流出口１３側となる面（蓋部材１５を正しく取り付けた場合に流出口１３側となる面の反対側の面）には、溝１６が形成されている。溝１６は、蓋部材１５をガスケット２０を介して流出口１３に誤って取り付けた場合に、ガスケット２０が有するビード２１と交差するよう設けられている（例えば、図４（Ａ）参照）。これにより、溝１６から冷却水を意図的にリークさせて、蓋部材１５の誤取り付けを発見できる。 Therefore, in the lid member 15 of the present embodiment, when the lid member 15 is erroneously attached, the cooling water is intentionally leaked so that the erroneous attachment of the lid member 15 can be detected. Specifically, in the lid member 15, as shown in FIG. 2B, the surface that becomes the outlet 13 side when the lid member 15 is erroneously attached (the outlet when the lid member 15 is correctly attached). A groove 16 is formed on the surface opposite to the surface on the 13 side). The groove 16 is provided so as to intersect the bead 21 of the gasket 20 when the lid member 15 is erroneously attached to the outlet 13 via the gasket 20 (see, for example, FIG. 4A). As a result, the cooling water can be intentionally leaked from the groove 16 to detect the erroneous attachment of the lid member 15.

図３（Ａ）は、蓋部材１５を正しく取り付けた場合の正面図であり、図３（Ｂ）は、図３（Ａ）のＡ−Ａ線の断面図である。図３（Ａ）では、ガスケット２０のビード２１を点線で示している。図３（Ａ）に示すように、蓋部材１５を正しく取り付けた場合、溝１６が流出口１３とは反対側に位置し、ガスケット２０のビード２１の折れ曲がり部２１ａ，２１ｂにおいて面圧が発生し、冷却水の漏れが防止される。 3A is a front view when the lid member 15 is correctly attached, and FIG. 3B is a cross-sectional view taken along the line AA of FIG. 3A. In FIG. 3A, the bead 21 of the gasket 20 is shown by a dotted line. As shown in FIG. 3A, when the lid member 15 is correctly attached, the groove 16 is located on the side opposite to the outlet 13, and surface pressure is generated at the bent portions 21a and 21b of the bead 21 of the gasket 20. , Leakage of cooling water is prevented.

図４（Ａ）は、蓋部材１５を誤って取り付けた場合の正面図であり、図４（Ｂ）は、図４（Ａ）のＡ−Ａ線の断面図である。なお、図４（Ａ）では、溝１６を二点鎖線で示し、ガスケット２０のビード２１を点線で示している。蓋部材１５を誤って取り付けた場合、図４（Ｂ）に示すように、溝１６がビード２１と交差するため、ビード２１の折れ曲がり部２１ａ，２１ｂにおいて面圧が発生せず、冷却水が矢印Ａ１で示すように漏れ出す。これにより、蓋部材１５の誤取り付けを発見することができる。 4 (A) is a front view when the lid member 15 is erroneously attached, and FIG. 4 (B) is a cross-sectional view taken along the line AA of FIG. 4 (A). In FIG. 4A, the groove 16 is indicated by a two-dot chain line, and the bead 21 of the gasket 20 is indicated by a dotted line. When the lid member 15 is erroneously attached, as shown in FIG. 4B, since the groove 16 intersects the bead 21, no surface pressure is generated at the bent portions 21a and 21b of the bead 21, and the cooling water is indicated by an arrow. It leaks as shown by A1. Thereby, it is possible to detect the erroneous attachment of the lid member 15.

なお、図４（Ｂ）において、ガスケット２０の内輪郭が溝１６の内輪郭よりも内側に位置しているが、これに限られるものではない。溝１６とビード２１とが交差していれば、ガスケット２０の内輪郭は溝１６の内輪郭よりも外側に位置していてもよい。 In FIG. 4B, the inner contour of the gasket 20 is located inside the inner contour of the groove 16, but the present invention is not limited to this. If the groove 16 and the bead 21 intersect, the inner contour of the gasket 20 may be located outside the inner contour of the groove 16.

なお、溝１６の深さを０．１５ｍｍ以上とするのが好ましい。溝１６の深さを０．１５ｍｍ以上とすることで、蓋部材１５を流出口１３にボルトで取り付ける際のボルト締結面の面圧を均一にしつつ、冷却水の漏れによる誤取り付けを発見することができる。 The depth of the groove 16 is preferably 0.15 mm or more. By setting the depth of the groove 16 to 0.15 mm or more, the surface pressure of the bolt fastening surface when the lid member 15 is attached to the outlet 13 with bolts is made uniform, and erroneous attachment due to leakage of cooling water is detected. Can be done.

以上詳細に説明したように、冷却水流路１０は、オイルクーラ８０へ冷却水を流出させるために設けられた流出口１３を覆う蓋部材１５を備え、蓋部材１５は、蓋部材１５をガスケット２０を介して流出口１３に正しく取り付けた場合に流出口１３側となる面の反対側の面に溝１６を有し、溝１６は、蓋部材１５がガスケット２０を介して流出口１３に誤って取り付けられた場合に、ガスケット２０が有するビード２１と交差するように設けられている。これにより、蓋部材１５を誤って取り付けた場合、冷却水が溝１６から漏れ出すため、蓋部材１５の誤取り付けを発見することができる。 As described in detail above, the cooling water flow path 10 includes a lid member 15 that covers the outlet 13 provided for allowing the cooling water to flow out to the oil cooler 80, and the lid member 15 has the lid member 15 as a gasket 20. The groove 16 has a groove 16 on the surface opposite to the surface that becomes the outlet 13 side when correctly attached to the outlet 13 through the groove 16, and the lid member 15 erroneously enters the outlet 13 via the gasket 20. When attached, it is provided so as to intersect the bead 21 of the gasket 20. As a result, if the lid member 15 is erroneously attached, the cooling water leaks from the groove 16, so that the erroneous attachment of the lid member 15 can be detected.

なお、上記実施形態において、蓋部材１５には２つの溝１６が形成されていたが、溝１６の数は１つでもよいし、３以上であってもよい。 In the above embodiment, the lid member 15 is formed with two grooves 16, but the number of grooves 16 may be one or three or more.

また、上記実施形態において、溝１６がガスケット２０のビード２１と交差していれば、溝１６は蓋部材１５の外周端まで延伸していなくてもよい。 Further, in the above embodiment, if the groove 16 intersects the bead 21 of the gasket 20, the groove 16 does not have to extend to the outer peripheral end of the lid member 15.

上記実施形態は本発明を実施するための例にすぎず、本発明はこれらに限定されるものではなく、これらの実施例を種々変形することは本発明の範囲内であり、更に本発明の範囲内において、他の様々な実施例が可能であることは上記記載から自明である。 The above-described embodiment is merely an example for carrying out the present invention, the present invention is not limited thereto, and various modifications of these examples are within the scope of the present invention, and further, the present invention. It is self-evident from the above description that various other embodiments are possible within the scope.

１０ 冷却水流路
１３ 流出口
１５ 蓋部材
１６ 溝
２０ ガスケット
２１ ビード
５０ エンジン 10 Cooling water flow path 13 Outlet 15 Lid member 16 Groove 20 Gasket 21 Bead 50 Engine

Claims (1)

オイルクーラへ冷却水を流出させるために設けられた流出口を覆う蓋部材を備える、内燃機関の冷却水流路であって、
前記蓋部材は、前記蓋部材をガスケットを介して前記流出口に正しく取り付けた場合に前記流出口側となる面の反対側の面に溝を有し、
前記溝は、前記蓋部材を前記ガスケットを介して前記流出口に誤って取り付けた場合に、前記ガスケットが有するビードと交差するように設けられる、
ことを特徴とする内燃機関の冷却水流路。 A cooling water flow path for an internal combustion engine provided with a lid member covering an outlet provided for allowing cooling water to flow out to an oil cooler.
The lid member has a groove on the surface opposite to the surface that becomes the outlet side when the lid member is correctly attached to the outlet via a gasket.
The groove is provided so as to intersect the bead of the gasket when the lid member is erroneously attached to the outlet via the gasket.
A cooling water flow path for an internal combustion engine.
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