JP6919552B2 - Cooling circuit and oil cooler - Google Patents

Cooling circuit and oil cooler Download PDF

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Publication number
JP6919552B2
JP6919552B2 JP2017245714A JP2017245714A JP6919552B2 JP 6919552 B2 JP6919552 B2 JP 6919552B2 JP 2017245714 A JP2017245714 A JP 2017245714A JP 2017245714 A JP2017245714 A JP 2017245714A JP 6919552 B2 JP6919552 B2 JP 6919552B2
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cooling water
flow path
oil
cooling
passage
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JP2019112981A (en
JP2019112981A5 (en
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宮川　雅志
雅志 宮川
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Denso Corp
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Denso Corp
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Priority to JP2017245714A priority Critical patent/JP6919552B2/en
Priority to PCT/JP2018/043173 priority patent/WO2019123970A1/en
Priority to CN201880082387.6A priority patent/CN111542688A/en
Publication of JP2019112981A publication Critical patent/JP2019112981A/en
Publication of JP2019112981A5 publication Critical patent/JP2019112981A5/ja
Priority to US16/904,110 priority patent/US20200318529A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/06—Lubricating systems characterised by the provision therein of crankshafts or connecting rods with lubricant passageways, e.g. bores
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/08—Arrangements of lubricant coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0093—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/04—Lubricant cooler
    • F01P2060/045—Lubricant cooler for transmissions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0412—Cooling or heating; Control of temperature
    • F16H57/0413—Controlled cooling or heating of lubricant; Temperature control therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0089—Oil coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/008—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for vehicles
    • F28D2021/0091—Radiators
    • F28D2021/0094—Radiators for recooling the engine coolant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
    • F28D9/0075—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements the plates having openings therein for circulation of the heat-exchange medium from one conduit to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • F28F3/027—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/06—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being attachable to the element

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Description

本開示は、冷却回路及びオイルクーラに関する。 The present disclosure relates to a cooling circuit and an oil cooler.

従来、下記の特許文献１に記載のオイルクーラがある。特許文献１に記載のオイルクーラは、多数のプレートを積層してなる熱交換器コアと、その頂部に取り付けられた流路制御弁とを有する。流路制御弁は、プレートの頂部にろう付けされたバルブハウジングとロータリバルブとからなり、低温冷却水が供給される低温冷却水導入口と、高温冷却水が供給される高温冷却水導入口と、冷却水を戻す冷却水導出口とを有している。熱交換器コアのコア冷却水入口及びコア冷却水出口は、バルブハウジングの内部に連通されている。ロータリバルブの切り替え位置に応じてこれらの流路が適宜に連通し、オイルの加熱及び冷却が行われる。 Conventionally, there is an oil cooler described in Patent Document 1 below. The oil cooler described in Patent Document 1 has a heat exchanger core formed by stacking a large number of plates and a flow path control valve attached to the top thereof. The flow path control valve consists of a valve housing brazed to the top of the plate and a rotary valve, and has a low-temperature cooling water introduction port to which low-temperature cooling water is supplied and a high-temperature cooling water introduction port to which high-temperature cooling water is supplied. It has a cooling water outlet for returning the cooling water. The core cooling water inlet and the core cooling water outlet of the heat exchanger core communicate with each other inside the valve housing. These flow paths communicate appropriately according to the switching position of the rotary valve, and the oil is heated and cooled.

特開２０１２−５７８８９号公報Japanese Unexamined Patent Publication No. 2012-57889

ところで、特許文献１に記載されるようなオイルクーラでは、オイルを加熱する場合と、オイルを冷却する場合とで、用いられる冷却水の流量が異なる。具体的には、オイルを加熱する際に用いられる高温冷却水の流量よりも、オイルを冷却する際に用いられる低温冷却水の流量の方が多くなりやすい。特許文献１に記載のオイルクーラでは、冷却水の流量が相対的に少ないオイル加熱時、及び冷却水の流量が相対的に多いオイル冷却時のいずれの場合でも、一つの冷却水導出口から冷却水が排出される。そのため、特に冷却水の流量の多いオイル冷却時に冷却水の圧力損失が大きくなりやすい。冷却水の圧力損失が大きくなると、冷却水の流速が低下するため、オイルクーラの熱交換性能が低下したり、ポンプ負荷が増加したりする等の問題が生じる可能性がある。 By the way, in an oil cooler as described in Patent Document 1, the flow rate of the cooling water used differs depending on whether the oil is heated or cooled. Specifically, the flow rate of the low-temperature cooling water used for cooling the oil tends to be larger than the flow rate of the high-temperature cooling water used for heating the oil. In the oil cooler described in Patent Document 1, cooling is performed from one cooling water outlet in both cases of oil heating in which the flow rate of cooling water is relatively small and oil cooling in which the flow rate of cooling water is relatively large. Water is drained. Therefore, the pressure loss of the cooling water tends to be large especially when the oil is cooled with a large flow rate of the cooling water. When the pressure loss of the cooling water becomes large, the flow velocity of the cooling water decreases, which may cause problems such as a decrease in the heat exchange performance of the oil cooler and an increase in the pump load.

本開示は、こうした実情に鑑みてなされたものであり、その目的は、流量の変更を可能としつつ、圧力損失を低減することの可能なオイルクーラ及び冷却回路を提供することにある。 The present disclosure has been made in view of these circumstances, and an object of the present invention is to provide an oil cooler and a cooling circuit capable of reducing a pressure loss while allowing a change in a flow rate.

上記課題を解決する冷却回路（１０）は、第１冷却水が流れる第１冷却水流路（Ｗ２０）と、第２冷却水が流れる第２冷却水流路（Ｗ２３，Ｗ５２）と、流入する冷却水の温度が所定温度以上であるときに第１冷却水流路における第１冷却水の流通を遮断するとともに、冷却水の温度が所定温度以上であるときに第１冷却水流路における第１冷却水の流通を許可するサーモスタット（４３）と、オイルを加熱又は冷却するオイルクーラ（５１）と、を備える。オイルクーラは、第１冷却水流路を流れる第１冷却水が流入する第１冷却水流入口（５１１ａ）と、第２冷却水流路を流れる第２冷却水が流入する第２冷却水流入口（５１２ａ）と、第１冷却水流入口及び第２冷却水流入口の両方が接続される内部流路（７７）と、内部流路に接続され、内部流路を流れた冷却水を第１冷却水流路に流出させる第１冷却水流出口（５１１ｂ）と、内部流路に接続され、内部流路を流れた冷却水を第２冷却水流路に流出させる第２冷却水流出口（５１２ｂ）と、を有し、サーモスタットにより第１冷却水流路における第１冷却水の流通が遮断されている場合、第２冷却水流入口のみを通じて内部流路に第２冷却水が流入し、サーモスタットにより第１冷却水流路における第１冷却水の流通が許可されている場合、第１冷却水流入口及び第２冷却水流入口の両方を通じて内部流路に第１冷却水及び第２冷却水が流入し、内部流路を流れる冷却水とオイルとの熱交換によりオイルを加熱又は冷却する。
The cooling circuit (10) that solves the above problems includes a first cooling water flow path (W20) through which the first cooling water flows, a second cooling water flow path (W23, W52) through which the second cooling water flows, and an inflowing cooling water. The flow of the first cooling water in the first cooling water flow path is blocked when the temperature of It includes a thermostat (43) that permits distribution and an oil cooler (51) that heats or cools the oil. The oil cooler has a first cooling water inflow port (511a) into which the first cooling water flowing through the first cooling water flow path flows in, and a second cooling water inflow port (512a) in which the second cooling water flowing through the second cooling water flow path flows in. And the internal flow path (77) to which both the first cooling water inflow port and the second cooling water inflow port are connected, and the cooling water connected to the internal flow path and flowing through the internal flow path flows out to the first cooling water flow path. The thermostat has a first cooling water outlet (511b) for causing the cooling water to flow out, and a second cooling water outlet (512b) which is connected to the internal flow path and allows the cooling water flowing through the internal flow path to flow out to the second cooling water flow path. When the flow of the first cooling water in the first cooling water flow path is blocked by the first cooling water flow path, the second cooling water flows into the internal flow path only through the second cooling water inflow port, and the first cooling in the first cooling water flow path is performed by the thermostat. When water flow is permitted, the first cooling water and the second cooling water flow into the internal flow path through both the first cooling water inlet and the second cooling water inlet, and the cooling water and oil flowing through the internal flow path. The oil is heated or cooled by heat exchange with.

この構成によれば、サーモスタットにより第１冷却水流路における第１冷却水の流通が遮断されている場合には、オイルクーラには第２冷却水のみが流入する。これに対し、サーモスタットにより第１冷却水流路における第１冷却水の流通が許可されている場合には、オイルクーラには第１冷却水及び第２冷却水の両方が流入する。よって、オイルクーラを流れる冷却水の流量を変化させることができる。また、第１冷却水流出口及び第２冷却水流出口の２つの流出口から冷却水を流出させることができるため、流出口を一つしか有していない従来のオイルクーラと比較すると、冷却水の圧力損失を低減することができる。 According to this configuration, when the flow of the first cooling water in the first cooling water flow path is blocked by the thermostat, only the second cooling water flows into the oil cooler. On the other hand, when the thermostat permits the flow of the first cooling water in the first cooling water flow path, both the first cooling water and the second cooling water flow into the oil cooler. Therefore, the flow rate of the cooling water flowing through the oil cooler can be changed. Further, since the cooling water can flow out from the two outlets of the first cooling water outlet and the second cooling water outlet, the cooling water is compared with the conventional oil cooler having only one outlet. The pressure loss can be reduced.

上記課題を解決するために、複数のプレートが積層して配置されることにより、オイルが流通するオイル流路と、冷却水が流通する冷却水流路とが交互に設けられるオイルクーラ（５１）において、冷却水流路を構成する冷却水用プレート（７０）は、冷却水が流入する第１冷却水流入路（７２ａ）及び第２冷却水流入路（７３ａ）と、第１冷却水流入路及び第２冷却水流入路の両方に接続される内部流路（７７）と、内部流路から冷却水を流出させる第１冷却水流出路（７２ｂ）及び第２冷却水流出路（７３ｂ）と、を備え、第１冷却水流入路への冷却水の流入が遮断される一方、第２冷却水流入路に冷却水が流入している場合、内部流路には、第２冷却水流入路のみを通じて冷却水が流入し、第１冷却水流入路及び第２冷却水流入路の両方に冷却水が流入している場合、内部流路には、第１冷却水流入路及び第２冷却水流入路の両方を通じて冷却水が流入する。 In order to solve the above problem, in the oil cooler (51) in which a plurality of plates are stacked and arranged so that an oil flow path through which oil flows and a cooling water flow path through which cooling water flows are alternately provided. , cooling water plate constituting the cooling water passage (70), the first cooling water inlet passage cooling water is inflow (72a) and a second cooling water inlet channel and (73a), the first cooling water inlet channel The internal flow path (77) connected to both the second cooling water inflow path and the first cooling water outflow path (72b) and the second cooling water outflow path (73b) for draining the cooling water from the internal flow path. When the cooling water is blocked from flowing into the first cooling water inflow passage, while the cooling water is flowing into the second cooling water inflow passage, only the second cooling water inflow passage is passed through the internal flow path. When the cooling water flows in and the cooling water flows into both the first cooling water inflow passage and the second cooling water inflow passage, the first cooling water inflow passage and the second cooling water inflow passage enter the internal flow path. Cooling water flows in through both .

この構成によれば、例えば第１冷却水流入路に冷却水を流入させなければ、第２冷却水流入路のみから内部流路に冷却水が流入するようになる。これに対し、第１冷却水流入路に冷却水を流入させれば、第１冷却水流入路及び第２冷却水流入路の両方から内部流路に冷却水が流れるようになる。したがって、内部流路を流れる冷却水の流量を変化させることができる。また、第１冷却水流出路及び第２冷却水流出路の２つの流出路から冷却水を流出させることができるため、流出路を一つしか有していない従来のオイルクーラと比較すると、冷却水の圧力損失を低減することができる。 According to this configuration, for example, unless the cooling water flows into the first cooling water inflow passage, the cooling water flows into the internal flow path only from the second cooling water inflow passage. On the other hand, if the cooling water flows into the first cooling water inflow passage, the cooling water flows from both the first cooling water inflow passage and the second cooling water inflow passage into the internal flow path. Therefore, the flow rate of the cooling water flowing through the internal flow path can be changed. Further, since the cooling water can be discharged from the two outflow passages of the first cooling water outflow passage and the second cooling water outflow passage, the cooling water is compared with the conventional oil cooler having only one outflow passage. The pressure loss can be reduced.

なお、上記手段、特許請求の範囲に記載の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示す一例である。 The reference numerals in parentheses described in the above means and claims are examples showing the correspondence with the specific means described in the embodiments described later.

本開示によれば、流量の変更を可能としつつ、圧力損失を低減することの可能なオイルクーラ及び冷却回路を提供できる。 According to the present disclosure, it is possible to provide an oil cooler and a cooling circuit capable of reducing a pressure loss while making it possible to change the flow rate.

図１は、第１実施形態の冷却回路の概略構成を示すブロック図である。FIG. 1 is a block diagram showing a schematic configuration of a cooling circuit according to the first embodiment. 図２は、第１実施形態のオイルクーラの断面構造を示す断面図である。FIG. 2 is a cross-sectional view showing a cross-sectional structure of the oil cooler of the first embodiment. 図３は、第１実施形態のオフセットフィンの斜視構造を示す斜視図である。FIG. 3 is a perspective view showing a perspective structure of the offset fin of the first embodiment. 図４は、第１実施形態の冷却回路の動作例を示すブロック図である。FIG. 4 is a block diagram showing an operation example of the cooling circuit of the first embodiment. 図５は、第１実施形態のエンジンの冷却水の温度、及び変速機のオイルの温度の推移を示すタイムチャートである。FIG. 5 is a time chart showing changes in the temperature of the cooling water of the engine and the temperature of the oil of the transmission according to the first embodiment. 図６は、第１実施形態の冷却回路の動作例を示すブロック図である。FIG. 6 is a block diagram showing an operation example of the cooling circuit of the first embodiment. 図７は、第２実施形態の冷却回路の概略構成を示すブロック図である。FIG. 7 is a block diagram showing a schematic configuration of the cooling circuit of the second embodiment.

以下、冷却回路及びオイルクーラの実施形態について図面を参照しながら説明する。説明の理解を容易にするため、各図面において同一の構成要素に対しては可能な限り同一の符号を付して、重複する説明は省略する。
＜第１実施形態＞
はじめに、冷却回路及びオイルクーラの第１実施形態について説明する。 Hereinafter, embodiments of the cooling circuit and the oil cooler will be described with reference to the drawings. In order to facilitate understanding of the description, the same components are designated by the same reference numerals as much as possible in each drawing, and duplicate description is omitted.
<First Embodiment>
First, the first embodiment of the cooling circuit and the oil cooler will be described.

図１に示される本実施形態の冷却回路１０は、車両に搭載されており、エンジン４０の冷却水が循環するエンジン用冷却回路２０と、変速機５０の作動油が循環する変速機用冷却回路３０とにより構成されている。
エンジン用冷却回路２０には、エンジン４０、ラジエータ４１、ヒータコア４２、サーモスタット４３、及び冷却水ポンプ４４が設けられている。 The cooling circuit 10 of the present embodiment shown in FIG. 1 is mounted on a vehicle, and is an engine cooling circuit 20 in which the cooling water of the engine 40 circulates and a transmission cooling circuit 20 in which the hydraulic oil of the transmission 50 circulates. It is composed of 30 and.
The engine cooling circuit 20 is provided with an engine 40, a radiator 41, a heater core 42, a thermostat 43, and a cooling water pump 44.

エンジン４０は、冷却水流路Ｗ２０を通じてラジエータ４１に接続されている。また、エンジン４０は、冷却水流路Ｗ２１を通じてヒータコア４２に接続されている。したがって、エンジン４０と熱交換した冷却水は、冷却水流路Ｗ２０及び冷却水流路Ｗ２１を通じてラジエータ４１及びヒータコア４２の少なくとも一方に流れることが可能となっている。本実施形態では、冷却水流路Ｗ２０が第１冷却水流路に相当し、冷却水流路Ｗ２０を流れる冷却水が第１冷却水に相当する。 The engine 40 is connected to the radiator 41 through the cooling water flow path W20. Further, the engine 40 is connected to the heater core 42 through the cooling water flow path W21. Therefore, the cooling water that has exchanged heat with the engine 40 can flow to at least one of the radiator 41 and the heater core 42 through the cooling water flow path W20 and the cooling water flow path W21. In the present embodiment, the cooling water flow path W20 corresponds to the first cooling water flow path, and the cooling water flowing through the cooling water flow path W20 corresponds to the first cooling water flow path.

ラジエータ４１は、その内部を流れる冷却水と、その外部を流れる空気との間で熱交換を行うことにより冷却水を冷却する。ラジエータ４１により冷却された冷却水は、冷却水流路Ｗ２２を通じて冷却水ポンプ４４に流入する。
冷却水ポンプ４４は、エンジン４０から伝達される動力に基づいて駆動する機械式のポンプ、又は車両に搭載されたバッテリから供給される電力に基づいて駆動する電動式のポンプである。冷却水ポンプ４４は、流入する冷却水をエンジン４０に圧送することにより、エンジン用冷却回路２０の各要素に冷却水を循環させる。 The radiator 41 cools the cooling water by exchanging heat between the cooling water flowing inside the radiator 41 and the air flowing outside the radiator 41. The cooling water cooled by the radiator 41 flows into the cooling water pump 44 through the cooling water flow path W22.
The cooling water pump 44 is a mechanical pump driven based on the power transmitted from the engine 40, or an electric pump driven based on the electric power supplied from the battery mounted on the vehicle. The cooling water pump 44 pumps the inflowing cooling water to the engine 40 to circulate the cooling water to each element of the engine cooling circuit 20.

ヒータコア４２は、車両の空調装置の構成要素である。ヒータコア４２は、エンジン４０から供給される冷却水と、空調装置の空調ダクト内を流れる空気との間で熱交換を行うことにより、空調ダクト内を流れる空気を加熱する。空調装置では、この加熱された空気が空調ダクトを通じて車室内に吹き出されることにより車室内が暖房される。ヒータコア４２の内部を流れた冷却水は、冷却水流路Ｗ２３を通じてサーモスタット４３に流入する。本実施形態では、冷却水流路Ｗ２３が第２冷却水流路に相当し、冷却水流路Ｗ２３を流れる冷却水が第２冷却水に相当する。 The heater core 42 is a component of the vehicle air conditioner. The heater core 42 heats the air flowing in the air conditioning duct by exchanging heat between the cooling water supplied from the engine 40 and the air flowing in the air conditioning duct of the air conditioning device. In an air conditioner, the heated air is blown into the vehicle interior through an air conditioning duct to heat the vehicle interior. The cooling water that has flowed inside the heater core 42 flows into the thermostat 43 through the cooling water flow path W23. In the present embodiment, the cooling water flow path W23 corresponds to the second cooling water flow path, and the cooling water flowing through the cooling water flow path W23 corresponds to the second cooling water flow path.

サーモスタット４３は、ラジエータ４１とエンジン４０とを接続する冷却水流路Ｗ２２の途中に設けられている。サーモスタット４３は、冷却水の温度が所定の開弁温度Ｔｔｈ１未満である場合には、冷却水流路Ｗ２２を遮断する閉弁状態となる。開弁温度Ｔｔｈ１は、例えば８０度に設定されている。冷却水の温度が開弁温度Ｔｔｈ１未満である場合には、ヒータコア４２からエンジン４０への冷却水の流れが許可される一方、ラジエータ４１からエンジン４０への冷却水の流れが遮断される。サーモスタット４３は、冷却水の温度が開弁温度Ｔｔｈ１以上である場合には、冷却水流路Ｗ２２を開放する開弁状態となる。冷却水の温度が開弁温度Ｔｔｈ１以上である場合には、ヒータコア４２からエンジン４０への冷却水の流れが許可されるとともに、ラジエータ４１からエンジン４０への冷却水の流れも許可される。開弁温度Ｔｔｈ１よりも高い全開温度Ｔｔｈ２を冷却水の温度が超えると、サーモスタット４３は全開状態となる。 The thermostat 43 is provided in the middle of the cooling water flow path W22 that connects the radiator 41 and the engine 40. When the temperature of the cooling water is lower than the predetermined valve opening temperature Tth1, the thermostat 43 is in a valve closed state in which the cooling water flow path W22 is shut off. The valve opening temperature Tth1 is set to, for example, 80 degrees. When the temperature of the cooling water is lower than the valve opening temperature Tth1, the flow of the cooling water from the heater core 42 to the engine 40 is permitted, while the flow of the cooling water from the radiator 41 to the engine 40 is blocked. When the temperature of the cooling water is equal to or higher than the valve opening temperature Tth1, the thermostat 43 is in a valve-opened state in which the cooling water flow path W22 is opened. When the temperature of the cooling water is equal to or higher than the valve opening temperature Tth1, the flow of the cooling water from the heater core 42 to the engine 40 is permitted, and the flow of the cooling water from the radiator 41 to the engine 40 is also permitted. When the temperature of the cooling water exceeds the fully open temperature Tth2, which is higher than the valve opening temperature Tth1, the thermostat 43 is fully opened.

エンジン用冷却回路２０では、エンジン４０の冷間始動時等、冷却水の温度が低い状況では、サーモスタット４３が閉弁状態となる。そのため、冷却水ポンプ４４により圧送される冷却水は、ラジエータ４１以外の要素であるエンジン４０及びヒータコア４２を循環する。したがって、冷却水がラジエータ４１において冷却されることがないため、冷却水の温度を早期に上昇させ易くなる。結果的に、エンジン４０及びヒータコア４２が早期に暖気され易くなる。 In the engine cooling circuit 20, the thermostat 43 is closed when the temperature of the cooling water is low, such as when the engine 40 is cold started. Therefore, the cooling water pumped by the cooling water pump 44 circulates in the engine 40 and the heater core 42, which are elements other than the radiator 41. Therefore, since the cooling water is not cooled by the radiator 41, it becomes easy to raise the temperature of the cooling water at an early stage. As a result, the engine 40 and the heater core 42 are likely to be warmed up at an early stage.

その後、冷却水の温度が開弁温度Ｔｔｈ１以上に上昇すると、サーモスタット４３が開弁状態となる。そのため、冷却水ポンプ４４により圧送される冷却水は、エンジン４０、ラジエータ４１、及びヒータコア４２を循環する。これにより、ラジエータ４１において冷却された冷却水がエンジン４０に供給されるため、この冷却水がエンジン４０と熱交換することによりエンジン４０が冷却される。また、エンジン４０の内部を流れることにより加熱された冷却水の一部がヒータコア４２に供給されるため、ヒータコア４２の温度が高温状態に維持される。そのため、ヒータコア４２により、空調ダクト内を流れる空気を加熱することができる。 After that, when the temperature of the cooling water rises to the valve opening temperature Tth1 or higher, the thermostat 43 is opened. Therefore, the cooling water pumped by the cooling water pump 44 circulates in the engine 40, the radiator 41, and the heater core 42. As a result, the cooling water cooled by the radiator 41 is supplied to the engine 40, and the cooling water exchanges heat with the engine 40 to cool the engine 40. Further, since a part of the cooling water heated by flowing inside the engine 40 is supplied to the heater core 42, the temperature of the heater core 42 is maintained in a high temperature state. Therefore, the heater core 42 can heat the air flowing in the air conditioning duct.

変速機用冷却回路３０には、変速機５０、オイルクーラ５１、及びオイルポンプ５２が設けられている。
変速機５０は、オイル流路Ｗ３０を通じてオイルクーラ５１のオイル流入口５１０ａに接続されている。変速機５０の内部を流れたオイルは、オイル流路Ｗ３０を通じてオイルクーラ５１のオイル流入口５１０ａに流入する。 The transmission cooling circuit 30 is provided with a transmission 50, an oil cooler 51, and an oil pump 52.
The transmission 50 is connected to the oil inlet 510a of the oil cooler 51 through the oil flow path W30. The oil that has flowed inside the transmission 50 flows into the oil inlet 510a of the oil cooler 51 through the oil flow path W30.

オイルクーラ５１は、オイル流入口５１０ａ、第１冷却水流入口５１１ａ、第２冷却水流入口５１２ａ、オイル流出口５１０ｂ、第１冷却水流出口５１１ｂ、及び第２冷却水流出口５１２ｂを備えている。
オイル流入口５１０ａに流入したオイルは、オイルクーラ５１の内部を流れた後、オイル流出口５１０ｂから排出される。オイル流出口５１０ｂから排出されたオイルは、オイル流路Ｗ３１を通じてオイルポンプ５２に流入する。 The oil cooler 51 includes an oil inlet 510a, a first cooling water inlet 511a, a second cooling water inlet 512a, an oil outlet 510b, a first cooling water outlet 511b, and a second cooling water outlet 512b.
The oil that has flowed into the oil inlet 510a flows inside the oil cooler 51 and is then discharged from the oil outlet 510b. The oil discharged from the oil outlet 510b flows into the oil pump 52 through the oil flow path W31.

オイルポンプ５２は、例えば車両に搭載されたバッテリから供給される電力に基づいて駆動する電動式のポンプである。オイルポンプ５２は、流入するオイルを変速機５０に圧送することにより、変速機用冷却回路３０の各要素にオイルを循環させる。
オイルクーラ５１の第１冷却水流入口５１１ａは、バイパス流路Ｗ４０を通じて冷却水流路Ｗ２０に接続されている。よって、冷却水流路Ｗ２１を流れる冷却水の一部、すなわちエンジン４０から排出される冷却水の一部は、バイパス流路Ｗ４０を通じてオイルクーラ５１に流入する。バイパス流路Ｗ４０の途中には、逆止弁４５が設けられている。逆止弁４５は、冷却水流路Ｗ２０から第１冷却水流入口５１１ａに向かう方向への冷却水の流通を許可する一方、第１冷却水流入口５１１ａから冷却水流路Ｗ２０に向かう方向への冷却水の流通を規制している。本実施形態では、逆止弁４５が流通規制部に相当する。 The oil pump 52 is, for example, an electric pump that is driven based on the electric power supplied from a battery mounted on a vehicle. The oil pump 52 pumps the inflowing oil to the transmission 50 to circulate the oil in each element of the transmission cooling circuit 30.
The first cooling water inflow port 511a of the oil cooler 51 is connected to the cooling water flow path W20 through the bypass flow path W40. Therefore, a part of the cooling water flowing through the cooling water flow path W21, that is, a part of the cooling water discharged from the engine 40 flows into the oil cooler 51 through the bypass flow path W40. A check valve 45 is provided in the middle of the bypass flow path W40. The check valve 45 permits the flow of cooling water from the cooling water flow path W20 toward the first cooling water inflow port 511a, while the cooling water in the direction from the first cooling water inflow port 511a toward the cooling water flow path W20. It regulates distribution. In this embodiment, the check valve 45 corresponds to the distribution control unit.

オイルクーラ５１の第２冷却水流入口５１２ａは、バイパス流路Ｗ４１を通じて冷却水流路Ｗ２３に接続されている。よって、冷却水流路Ｗ２３を流れる冷却水の一部、すなわちヒータコア４２から排出される冷却水の一部は、バイパス流路Ｗ４１を通じてオイルクーラ５１に流入する。 The second cooling water inflow port 512a of the oil cooler 51 is connected to the cooling water flow path W23 through the bypass flow path W41. Therefore, a part of the cooling water flowing through the cooling water flow path W23, that is, a part of the cooling water discharged from the heater core 42 flows into the oil cooler 51 through the bypass flow path W41.

第１冷却水流入口５１１ａ及び第２冷却水流入口５１２ａの少なくとも一方からオイルクーラ５１の内部に流入した冷却水は、オイルクーラ５１を流れるオイルと熱交換する。これによりオイルが加熱又は冷却される。オイルクーラ５１の内部を流れた冷却水は、第１冷却水流出口５１１ｂ又は第２冷却水流出口５１２ｂから排出される。第１冷却水流出口５１１ｂは、バイパス流路Ｗ４２を通じて、冷却水流路Ｗ２０におけるバイパス流路Ｗ４０との接続部分よりも下流側の部分に接続されている。したがって、第１冷却水流出口５１１ｂから排出された冷却水は冷却水流路Ｗ２０に流入する。第２冷却水流出口５１２ｂは、バイパス流路Ｗ４３を通じて、冷却水流路Ｗ２３におけるバイパス流路Ｗ４１との接続部分よりも下流側の部分に接続されている。したがって、第２冷却水流出口５１２ｂから排出された冷却水は冷却水流路Ｗ２３に流入する。 The cooling water that has flowed into the oil cooler 51 from at least one of the first cooling water inlet 511a and the second cooling water inlet 512a exchanges heat with the oil flowing through the oil cooler 51. This heats or cools the oil. The cooling water that has flowed inside the oil cooler 51 is discharged from the first cooling water outlet 511b or the second cooling water outlet 512b. The first cooling water outlet 511b is connected to a portion of the cooling water flow path W20 on the downstream side of the connection portion with the bypass flow path W40 through the bypass flow path W42. Therefore, the cooling water discharged from the first cooling water outlet 511b flows into the cooling water flow path W20. The second cooling water outlet 512b is connected to a portion of the cooling water flow path W23 on the downstream side of the connection portion with the bypass flow path W41 through the bypass flow path W43. Therefore, the cooling water discharged from the second cooling water outlet 512b flows into the cooling water flow path W23.

次に、オイルクーラ５１の具体的な構造について説明する。
オイルクーラ５１は、複数のプレートが積層して配置されることにより、オイルが流通するオイル流路と、冷却水が流通する冷却水流路とが交互に設けられた構造を有している。図２は、オイルクーラ５１の冷却水流路を構成する冷却水用プレート７０の断面構造を示したものである。 Next, the specific structure of the oil cooler 51 will be described.
The oil cooler 51 has a structure in which a plurality of plates are stacked and arranged so that an oil flow path through which oil flows and a cooling water flow path through which cooling water flows are alternately provided. FIG. 2 shows the cross-sectional structure of the cooling water plate 70 constituting the cooling water flow path of the oil cooler 51.

図２に示されるように、冷却水用プレート７０は、プレート積層方向に直交する断面形状が略六角形状に形成されている。冷却水用プレート７０の内部には、冷却水が流れる内部流路７７が形成されている。冷却水用プレート７０には、冷却水用内部流路７７に連通される第１冷却水流入路７２ａ、第２冷却水流入路７３ａ、第１冷却水流出路７２ｂ、及び第２冷却水流出路７３ｂが設けられている。また、冷却水用プレート７０には、冷却水用内部流路７７に連通されていないオイル流入路７１ａ、及びオイル流出路７１ｂが設けられている。第１冷却水流入路７２ａは、冷却水用プレート７０の角部Ｃ１に設けられている。冷却水用プレート７０において角部Ｃ１に隣り合う２つの角部Ｃ２，Ｃ３には、オイル流出路７１ｂ及び第２冷却水流入路７３ａがそれぞれ設けられている。冷却水用プレート７０において角部Ｃ１〜Ｃ３の対角に位置する角度Ｃ４〜Ｃ６には、第１冷却水流出路７２ｂ、オイル流入路７１ａ、及び第２冷却水流出路７３ｂが設けられている。第１冷却水流入路７２ａの内径は、第２冷却水流入路７３ａの内径よりも大きい。同様に、第１冷却水流出路７２ｂの内径は、第２冷却水流出路７３ｂの内径よりも大きい。 As shown in FIG. 2, the cooling water plate 70 has a substantially hexagonal cross-sectional shape orthogonal to the plate stacking direction. Inside the cooling water plate 70, an internal flow path 77 through which the cooling water flows is formed. The cooling water plate 70 includes a first cooling water inflow passage 72a, a second cooling water inflow passage 73a, a first cooling water outflow passage 72b, and a second cooling water outflow passage 73b that are communicated with the cooling water internal flow path 77. It is provided. Further, the cooling water plate 70 is provided with an oil inflow passage 71a and an oil outflow passage 71b that are not communicated with the cooling water internal flow path 77. The first cooling water inflow passage 72a is provided at the corner C1 of the cooling water plate 70. The two corners C2 and C3 adjacent to the corner C1 of the cooling water plate 70 are provided with an oil outflow passage 71b and a second cooling water inflow passage 73a, respectively. The first cooling water outflow passage 72b, the oil inflow passage 71a, and the second cooling water outflow passage 73b are provided at the angles C4 to C6 located diagonally to the corners C1 to C3 in the cooling water plate 70. The inner diameter of the first cooling water inflow passage 72a is larger than the inner diameter of the second cooling water inflow passage 73a. Similarly, the inner diameter of the first cooling water outflow passage 72b is larger than the inner diameter of the second cooling water outflow passage 73b.

なお、以下では、第１冷却水流入路７２ａから第１冷却水流出路７２ｂに向かう方向を「Ｘ方向」と称し、Ｘ方向と直交する方向を「Ｙ方向」と称する。また、第２冷却水流出路７３ｂから第２冷却水流出路７３ｂに向かう方向、すなわちＸ方向及びＹ方向を二等分する方向を「α方向」と称する。本実施形態では、Ｘ方向が第１方向に相当し、Ｙ方向が第２方向に相当し、α方向が第３方向に相当する。 In the following, the direction from the first cooling water inflow passage 72a to the first cooling water outflow passage 72b is referred to as "X direction", and the direction orthogonal to the X direction is referred to as "Y direction". Further, the direction from the second cooling water outflow passage 73b toward the second cooling water outflow passage 73b, that is, the direction that bisects the X direction and the Y direction is referred to as "α direction". In the present embodiment, the X direction corresponds to the first direction, the Y direction corresponds to the second direction, and the α direction corresponds to the third direction.

冷却水用プレート７０の冷却水用内部流路７７には、オフセットフィン７４が配置されている。図３に示されるように、オフセットフィン７４は、部分的に切り起こされた切り起こし部７４０をＸ方向に複数有している。Ｘ方向は、オフセットフィン７４の開口方向である。Ｘ方向において隣り合う切り起こし部７４０，７４０は、Ｙ方向にオフセットされて配置されている。このオフセットフィン７４では、冷却水が図２に示されるＸ方向に流れている場合、すなわち冷却水が第１冷却水流入路７２ａから第１冷却水流出路７２ｂに向かって流れている場合には、切り起こし部７４０の内部、及び隣り合う切り起こし部７４０，７４０の隙間を冷却水が流れるため、冷却水に作用する通水抵抗が小さい。これに対し、冷却水がα方向に流れている場合、すなわち冷却水が第２冷却水流入路７３ａから第２冷却水流出路７３ｂに向かって流れている場合には、切り起こし部７４０に冷却水が衝突し易くなるため、冷却水に作用する通水抵抗が大きくなる。本実施形態では、オフセットフィン７４が通水抵抗付与部に相当する。 Offset fins 74 are arranged in the cooling water internal flow path 77 of the cooling water plate 70. As shown in FIG. 3, the offset fin 74 has a plurality of partially raised cut-up portions 740 in the X direction. The X direction is the opening direction of the offset fin 74. The cut-up portions 740 and 740 adjacent to each other in the X direction are arranged so as to be offset in the Y direction. In the offset fin 74, when the cooling water is flowing in the X direction shown in FIG. 2, that is, when the cooling water is flowing from the first cooling water inflow passage 72a toward the first cooling water outflow passage 72b, Since the cooling water flows inside the cut-up portion 740 and in the gaps between the adjacent cut-up portions 740 and 740, the water flow resistance acting on the cooling water is small. On the other hand, when the cooling water is flowing in the α direction, that is, when the cooling water is flowing from the second cooling water inflow passage 73a toward the second cooling water outflow passage 73b, the cooling water is sent to the cut-up portion 740. Is more likely to collide, so the water flow resistance acting on the cooling water increases. In the present embodiment, the offset fin 74 corresponds to the water flow resistance imparting portion.

冷却水用プレート７０における第１冷却水流入路７２ａと第２冷却水流入路７３ａとの間には、冷却水用プレート７０の内壁面から延びるようにリブ７５が形成されている。リブ７５は、第１冷却水流入路７２ａと第２冷却水流入路７３ａとの間における冷却水の流れの短絡を抑制している。 A rib 75 is formed between the first cooling water inflow passage 72a and the second cooling water inflow passage 73a in the cooling water plate 70 so as to extend from the inner wall surface of the cooling water plate 70. The rib 75 suppresses a short circuit in the flow of cooling water between the first cooling water inflow passage 72a and the second cooling water inflow passage 73a.

同様に、冷却水用プレート７０における第１冷却水流出路７２ｂと第２冷却水流出路７３ｂとの間には、冷却水用プレート７０の内壁面から延びるようにリブ７６が形成されている。リブ７６は、第１冷却水流出路７２ｂと第２冷却水流出路７３ｂとの間における冷却水の流れの短絡を抑制している。 Similarly, a rib 76 is formed between the first cooling water outflow passage 72b and the second cooling water outflow passage 73b in the cooling water plate 70 so as to extend from the inner wall surface of the cooling water plate 70. The rib 76 suppresses a short circuit of the cooling water flow between the first cooling water outflow passage 72b and the second cooling water outflow passage 73b.

このオイルクーラ５１では、図１に示されるオイル流入口５１０ａから、図２に示されるオイル流入路７１ａにオイルが流入する。オイル流入路７１ａに流入したオイルは、冷却水用プレート７０と隣り合うオイル用プレートに形成されたオイル用内部流路に流入する。図２に示されるように、オイル用内部流路を流れるオイルは、図中の矢印Ｄ１で示される方向に流れる。このオイルの流れ方向Ｄ１は、第１冷却水流入路７２ａから第１冷却水流出路７２ｂに向かう冷却水の流れ方向Ｄ２に対向している。このオイル用内部流路に流入したオイルは、オイル流出路７１ｂを通じて、図１に示されるオイル流出口５１０ｂから排出される。 In the oil cooler 51, oil flows into the oil inflow passage 71a shown in FIG. 2 from the oil inflow port 510a shown in FIG. The oil that has flowed into the oil inflow path 71a flows into the oil internal flow path formed in the oil plate adjacent to the cooling water plate 70. As shown in FIG. 2, the oil flowing through the internal flow path for oil flows in the direction indicated by the arrow D1 in the drawing. The oil flow direction D1 faces the cooling water flow direction D2 from the first cooling water inflow passage 72a to the first cooling water outflow passage 72b. The oil that has flowed into the internal oil flow path is discharged from the oil outlet 510b shown in FIG. 1 through the oil outflow passage 71b.

次に、本実施形態の冷却回路１０及びオイルクーラ５１の動作例について説明する。
エンジン４０の冷間始動時等、エンジン用冷却回路２０を流れる冷却水の温度が開弁温度Ｔｔｈ１未満である場合には、サーモスタット４３が閉弁状態になっている。この場合、図４に太線で示されるようにエンジン用冷却回路２０を冷却水が循環する。すなわち、エンジン４０、ヒータコア４２、オイルクーラ５１、サーモスタット４３、及び冷却水ポンプ４４に冷却水が循環する一方、ラジエータ４１には冷却水が循環しない。 Next, an operation example of the cooling circuit 10 and the oil cooler 51 of the present embodiment will be described.
When the temperature of the cooling water flowing through the engine cooling circuit 20 is lower than the valve opening temperature Tth1 such as during a cold start of the engine 40, the thermostat 43 is in the valve closed state. In this case, the cooling water circulates in the engine cooling circuit 20 as shown by the thick line in FIG. That is, the cooling water circulates in the engine 40, the heater core 42, the oil cooler 51, the thermostat 43, and the cooling water pump 44, but the cooling water does not circulate in the radiator 41.

この場合、エンジン４０との熱交換により加熱された冷却水が、冷却水流路Ｗ２１、ヒータコア４２、冷却水流路Ｗ２３、バイパス流路Ｗ４１を通じてオイルクーラ５１の第２冷却水流入口５１２ａに流入し、オイルクーラ５１の冷却水用内部流路７７を流れる。このオイルクーラ５１の冷却水用内部流路７７を流れる冷却水と、オイル用内部流路を流れるオイルとの間で熱交換が行われることにより、オイルが加熱される。すなわち、変速機５０を流れるオイルを加熱することができる。オイルとの熱交換により温度の低下した冷却水は、第２冷却水流出路７３ｂ及び第２冷却水流出口５１２ｂを通じてバイパス流路Ｗ４３に排出される。バイパス流路Ｗ４３に排出された冷却水は、冷却水流路Ｗ２３、サーモスタット４３、冷却水ポンプ４４を通じてエンジン４０に流入することにより、再度加熱される。 In this case, the cooling water heated by heat exchange with the engine 40 flows into the second cooling water inflow port 512a of the oil cooler 51 through the cooling water flow path W21, the heater core 42, the cooling water flow path W23, and the bypass flow path W41, and the oil It flows through the cooling water internal flow path 77 of the cooler 51. The oil is heated by heat exchange between the cooling water flowing through the cooling water internal flow path 77 of the oil cooler 51 and the oil flowing through the oil internal flow path. That is, the oil flowing through the transmission 50 can be heated. The cooling water whose temperature has dropped due to heat exchange with the oil is discharged to the bypass flow path W43 through the second cooling water outflow passage 73b and the second cooling water outlet 512b. The cooling water discharged to the bypass flow path W43 is reheated by flowing into the engine 40 through the cooling water flow path W23, the thermostat 43, and the cooling water pump 44.

なお、オイルクーラ５１では、第２冷却水流入路７３ａから第２冷却水流出路７３ｂに向かって冷却水が流れているため、冷却水がオフセットフィン７４から通水抵抗を受け易い。したがって、オイルクーラ５１内を流れる冷却水の流量が少なくなる。この点、図５に示されるように、例えば時刻ｔ１０でエンジン４０が始動したとすると、変速機５０のオイルの温度Ｔｔよりもエンジン４０の冷却水の温度Ｔｅの方が早期に上昇する。したがって、エンジン４０の冷却水の温度Ｔｅと変速機５０のオイルの温度Ｔｔとの間の温度差ΔＴが大きくなるため、仮にオイルクーラ５１内を流れる冷却水の流量が少ない場合でも、オイルの加熱が可能である。 In the oil cooler 51, since the cooling water flows from the second cooling water inflow passage 73a toward the second cooling water outflow passage 73b, the cooling water is likely to receive water flow resistance from the offset fin 74. Therefore, the flow rate of the cooling water flowing in the oil cooler 51 is reduced. In this regard, as shown in FIG. 5, if the engine 40 is started at time t10, for example, the temperature Te of the cooling water of the engine 40 rises earlier than the temperature Tt of the oil of the transmission 50. Therefore, since the temperature difference ΔT between the temperature Te of the cooling water of the engine 40 and the temperature Tt of the oil of the transmission 50 becomes large, even if the flow rate of the cooling water flowing in the oil cooler 51 is small, the oil is heated. Is possible.

その後、エンジン用冷却回路２０を流れる冷却水の温度が開弁温度Ｔｔｈ１以上に上昇すると、サーモスタット４３が開弁状態になる。この場合、図６に太線で示されるように冷却水がエンジン用冷却回路２０を循環する。すなわち、エンジン用冷却回路２０の全ての要素を冷却水が循環する。 After that, when the temperature of the cooling water flowing through the engine cooling circuit 20 rises to the valve opening temperature Tth1 or higher, the thermostat 43 is brought into the valve opening state. In this case, the cooling water circulates in the engine cooling circuit 20 as shown by the thick line in FIG. That is, the cooling water circulates in all the elements of the engine cooling circuit 20.

この場合、ラジエータ４１において冷却された冷却水がエンジン４０、冷却水流路Ｗ２０、バイパス流路Ｗ４０を通じてオイルクーラ５１の第１冷却水流入口５１１ａに流入する。また、冷却水流路Ｗ２３を流れる冷却水がバイパス流路Ｗ４１を通じてオイルクーラ５１の第２冷却水流入口５１２ａに流入する。これらの第１冷却水流入口５１１ａ及び第２冷却水流入口５１２ａに流入した冷却水がオイルクーラ５１の冷却水用内部流路７７を流れる。この冷却水用内部流路７７を流れる冷却水と、オイル用内部流路を流れるオイルとの間で熱交換が行われることにより、オイルが冷却される。すなわち、変速機５０を流れるオイルが冷却される。そのため、図５に示されるように、冷却水の温度が開弁温度Ｔｔｈ１を超える時刻ｔ１１以降、変速機５０のオイルの温度Ｔｔが低下する。 In this case, the cooling water cooled by the radiator 41 flows into the first cooling water inflow port 511a of the oil cooler 51 through the engine 40, the cooling water flow path W20, and the bypass flow path W40. Further, the cooling water flowing through the cooling water flow path W23 flows into the second cooling water inflow port 512a of the oil cooler 51 through the bypass flow path W41. The cooling water that has flowed into the first cooling water inflow port 511a and the second cooling water inflow port 512a flows through the cooling water internal flow path 77 of the oil cooler 51. The oil is cooled by heat exchange between the cooling water flowing through the cooling water internal flow path 77 and the oil flowing through the oil internal flow path 77. That is, the oil flowing through the transmission 50 is cooled. Therefore, as shown in FIG. 5, the oil temperature Tt of the transmission 50 decreases after the time t11 when the temperature of the cooling water exceeds the valve opening temperature Tth1.

オイルを熱交換することにより加熱された冷却水は、第１冷却水流入路７２ａ及び第１冷却水流出口５１１ｂを通じてバイパス流路Ｗ４２に排出されるか、あるいは第２冷却水流出路７３ｂ及び第２冷却水流出口５１２ｂからバイパス流路Ｗ４３に排出される。バイパス流路Ｗ４２に排出された冷却水は、冷却水流路Ｗ２０を通じてラジエータ４１に流入することにより、再度冷却される。 The cooling water heated by heat exchange of the oil is discharged to the bypass flow path W42 through the first cooling water inflow passage 72a and the first cooling water outlet 511b, or is discharged to the second cooling water outflow passage 73b and the second cooling. It is discharged from the water outlet 512b to the bypass flow path W43. The cooling water discharged to the bypass flow path W42 is cooled again by flowing into the radiator 41 through the cooling water flow path W20.

以上説明した本実施形態の冷却回路１０及びオイルクーラ５１によれば、以下の（１）〜（６）に示される作用及び効果を得ることができる。
（１）サーモスタット４３により冷却水流路Ｗ２０における冷却水の流通が遮断されている場合、オイルクーラ５１の第１冷却水流入路７２ａに冷却水が流入しないため、オイルクーラ５１の内部流路７７には、第２冷却水流入路７３ａのみから冷却水が流入する。これに対し、サーモスタット４３により冷却水流路Ｗ２０における冷却水の流通が許可されている場合、オイルクーラ５１の内部流路７７には、第１冷却水流入路７２ａ及び第２冷却水流入路７３ａの両方から冷却水が流入する。よって、オイルクーラ５１を流れる冷却水の流量を変化させることができる。また、オイルクーラ５１には、第１冷却水流出口５１１ｂ及び第２冷却水流出口５１２ｂの２つの流出口、並びに第１冷却水流出路７２ｂ及び第２冷却水流出路７３ｂの２つの流出路から冷却水を流出させることができるため、流出口及び流出路をそれぞれ一つしか有していない従来のオイルクーラと比較すると、冷却水の圧力損失を低減することができる。 According to the cooling circuit 10 and the oil cooler 51 of the present embodiment described above, the actions and effects shown in the following (1) to (6) can be obtained.
(1) When the flow of the cooling water in the cooling water flow path W20 is blocked by the thermostat 43, the cooling water does not flow into the first cooling water inflow passage 72a of the oil cooler 51, so that the cooling water does not flow into the internal flow path 77 of the oil cooler 51. The cooling water flows in only from the second cooling water inflow passage 73a. On the other hand, when the thermostat 43 permits the flow of cooling water in the cooling water flow path W20, the internal flow path 77 of the oil cooler 51 has the first cooling water inflow passage 72a and the second cooling water inflow passage 73a. Cooling water flows in from both. Therefore, the flow rate of the cooling water flowing through the oil cooler 51 can be changed. Further, the oil cooler 51 is provided with cooling water from two outlets of the first cooling water outlet 511b and the second cooling water outlet 512b, and two outflow passages of the first cooling water outflow passage 72b and the second cooling water outflow passage 73b. Since it can flow out, the pressure loss of the cooling water can be reduced as compared with a conventional oil cooler having only one outlet and one outflow passage.

（２）オイルクーラ５１の第１冷却水流入口５１１ａと冷却水流路Ｗ２０とを接続するバイパス流路Ｗ４０には、逆止弁４５が設けられている。逆止弁４５は、オイルクーラ５１の第１冷却水流入口５１１ａから冷却水流路Ｗ２０に向かう方向への冷却水の流通を規制する。これにより、サーモスタット４３が閉弁状態であるときに、オイルクーラ５１の内部流路７７を流れる冷却水が冷却水流路Ｗ２０に向かって逆流することを防止できる。 (2) A check valve 45 is provided in the bypass flow path W40 that connects the first cooling water inflow port 511a of the oil cooler 51 and the cooling water flow path W20. The check valve 45 regulates the flow of cooling water in the direction from the first cooling water inflow port 511a of the oil cooler 51 toward the cooling water flow path W20. As a result, when the thermostat 43 is in the valve closed state, it is possible to prevent the cooling water flowing through the internal flow path 77 of the oil cooler 51 from flowing back toward the cooling water flow path W20.

（３）オイルクーラ５１では、第１冷却水流入口５１１ａから第１冷却水流入路７２ａに流入した冷却水が第１冷却水流出路７２ｂを通じて第１冷却水流出口５１１ｂから排出される。この冷却水の流れ方向Ｄ２とオイルの流れ方向Ｄ１とが対向している。これにより、より効率的に冷却水とオイルとの間で熱交換を行うことができるため、オイルの冷却効率を高めることができる。 (3) In the oil cooler 51, the cooling water that has flowed into the first cooling water inflow passage 72a from the first cooling water inflow port 511a is discharged from the first cooling water outflow outlet 511b through the first cooling water outflow passage 72b. The cooling water flow direction D2 and the oil flow direction D1 face each other. As a result, heat exchange between the cooling water and the oil can be performed more efficiently, so that the cooling efficiency of the oil can be improved.

（４）オイルクーラ５１の冷却水用プレート７０は、オフセットフィン７４を有している。オフセットフィン７４は、第１冷却水流入路７２ａから第１冷却水流出路７２ｂに向かう方向であるＸ方向に流れる際に冷却水が受ける通水抵抗と、第２冷却水流入路７３ａから第２冷却水流出路７３ｂに向かう方向であるα方向に流れる際に冷却水が受ける通水抵抗とを異ならせる。具体的には、前者の通水抵抗よりも後者の通水抵抗の方が大きい。これにより、冷却水が第１冷却水流入路７２ａから第１冷却水流出路７２ｂに向かって流れ易くなるため、オイルクーラ５１内の冷却水がラジエータ４１に流れ易くなる。結果的に、冷却回路１０内の冷却水を冷却させ易くなるため、冷却回路１０の冷却効率を高めることができる。また、冷却水用プレート７０の内部にオフセットフィン７４を配置するだけで、２方向の通水抵抗を容易に異ならせることができる。 (4) The cooling water plate 70 of the oil cooler 51 has offset fins 74. The offset fin 74 has a water flow resistance that the cooling water receives when flowing in the X direction, which is the direction from the first cooling water inflow passage 72a to the first cooling water outflow passage 72b, and the second cooling from the second cooling water inflow passage 73a. The water flow resistance received by the cooling water when flowing in the α direction, which is the direction toward the water outflow passage 73b, is different. Specifically, the water flow resistance of the latter is larger than the water flow resistance of the former. As a result, the cooling water easily flows from the first cooling water inflow passage 72a toward the first cooling water outflow passage 72b, so that the cooling water in the oil cooler 51 easily flows to the radiator 41. As a result, the cooling water in the cooling circuit 10 can be easily cooled, so that the cooling efficiency of the cooling circuit 10 can be improved. Further, the water flow resistance in the two directions can be easily changed only by arranging the offset fins 74 inside the cooling water plate 70.

（５）オイルクーラ５１では、第１冷却水流入路７２ａ及び第１冷却水流出路７２ｂが、Ｘ方向においてオフセットフィン７４を挟んで対向するように配置されている。また、第２冷却水流入路７３ａ及び第２冷却水流出路７３ｂが、α方向においてオフセットフィン７４を挟んで対向するように配置されている。これにより、冷却水とオイルとの熱交換効率を高く維持しつつも、Ｘ方向に流れる冷却水に作用する通水抵抗と、α方向に流れる冷却水に作用する通水抵抗とを異ならせることができる。 (5) In the oil cooler 51, the first cooling water inflow passage 72a and the first cooling water outflow passage 72b are arranged so as to face each other with the offset fin 74 in the X direction. Further, the second cooling water inflow passage 73a and the second cooling water outflow passage 73b are arranged so as to face each other with the offset fin 74 in the α direction. As a result, while maintaining high heat exchange efficiency between the cooling water and the oil, the water flow resistance acting on the cooling water flowing in the X direction and the water flow resistance acting on the cooling water flowing in the α direction are made different. Can be done.

（６）オイルクーラ５１における第１冷却水流入路７２ａと第２冷却水流入路７３ａとの間にはリブ７５が設けられている。リブ７５により、第１冷却水流入路７２ａと第２冷却水流入路７３ａとの間における冷却水の流れの短絡を抑制することができるため、オイルクーラ５１の熱交換効率の低下を抑制することができる。 (6) A rib 75 is provided between the first cooling water inflow passage 72a and the second cooling water inflow passage 73a in the oil cooler 51. Since the rib 75 can suppress a short circuit of the cooling water flow between the first cooling water inflow passage 72a and the second cooling water inflow passage 73a, it is possible to suppress a decrease in the heat exchange efficiency of the oil cooler 51. Can be done.

＜第２実施形態＞
次に、冷却回路１０の第２実施形態について説明する。以下、第１実施形態の冷却回路１０との相違点を中心に説明する。なお、本実施形態のエンジン４０は、過給機付きのエンジンである。 <Second Embodiment>
Next, a second embodiment of the cooling circuit 10 will be described. Hereinafter, the differences from the cooling circuit 10 of the first embodiment will be mainly described. The engine 40 of the present embodiment is an engine with a supercharger.

図７に示されるように、本実施形態の冷却回路１０は、ヒータコア４２を流れる回路に代えて、チャージエアクーラ（Charge Air Cooler : CAC）８１の冷却水が循環するＣＡＣ用冷却回路８０を備えている。ＣＡＣ用冷却回路８０には、ＣＡＣ８１、低水温ラジエータ８２、冷却水用ポンプ８３、及びサーモスタット８４が設けられている。 As shown in FIG. 7, the cooling circuit 10 of the present embodiment includes a CAC cooling circuit 80 in which the cooling water of the charge air cooler (CAC) 81 circulates, instead of the circuit flowing through the heater core 42. ing. The CAC cooling circuit 80 is provided with a CAC 81, a low water temperature radiator 82, a cooling water pump 83, and a thermostat 84.

ＣＡＣ８１は、過給機付きエンジン４０において圧縮された吸気を冷却することにより空気密度を高める装置である。ＣＡＣ８１と低水温ラジエータ８２との間には冷却水流路Ｗ５０，Ｗ５１を通じて冷却水が循環している。低水温ラジエータ８２は、その内部を流れる冷却水と、その外部を流れる空気との間で熱交換を行うことにより、冷却水を冷却する。 The CAC 81 is a device that increases the air density by cooling the compressed intake air in the engine 40 with a supercharger. Cooling water circulates between the CAC 81 and the low water temperature radiator 82 through the cooling water channels W50 and W51. The low water temperature radiator 82 cools the cooling water by exchanging heat between the cooling water flowing inside the radiator 82 and the air flowing outside the cooling water.

冷却水用ポンプ８３は、冷却水流路Ｗ５１に設けられている。冷却水用ポンプ８３は、ＣＡＣ用冷却回路８０内の冷却水を循環させる。
オイルクーラ５１の第２冷却水流入口５１２ａは、冷却水流路Ｗ５２を通じて冷却水流路Ｗ５０に接続されている。また、オイルクーラ５１の第２冷却水流出口５１２ｂは、冷却水流路Ｗ５３を通じて冷却水流路Ｗ５１に接続されている。本実施形態では、冷却水流路Ｗ５２が第２冷却水流路に相当し、冷却水流路Ｗ５２の内部を流れる冷却水が第２冷却水に相当する。 The cooling water pump 83 is provided in the cooling water flow path W51. The cooling water pump 83 circulates the cooling water in the CAC cooling circuit 80.
The second cooling water inflow port 512a of the oil cooler 51 is connected to the cooling water flow path W50 through the cooling water flow path W52. Further, the second cooling water outlet 512b of the oil cooler 51 is connected to the cooling water flow path W51 through the cooling water flow path W53. In the present embodiment, the cooling water flow path W52 corresponds to the second cooling water flow path, and the cooling water flowing inside the cooling water flow path W52 corresponds to the second cooling water flow path.

サーモスタット８４は、冷却水流路Ｗ５０における冷却水流路Ｗ５２との接続部分に設けられている。サーモスタット８４は、冷却水の温度が所定温度未満である場合には閉弁状態となり、冷却水流路Ｗ５０における冷却水の流れを遮断する。サーモスタット８４は、冷却水の温度が所定温度以上である場合には開弁状態となり、冷却水流路Ｗ５０における冷却水の流れを許可する。 The thermostat 84 is provided at a connection portion of the cooling water flow path W50 with the cooling water flow path W52. When the temperature of the cooling water is lower than the predetermined temperature, the thermostat 84 is closed and shuts off the flow of the cooling water in the cooling water flow path W50. The thermostat 84 is opened when the temperature of the cooling water is equal to or higher than a predetermined temperature, and allows the flow of the cooling water in the cooling water flow path W50.

なお、本実施形態の冷却回路１０では、冷却水流路Ｗ２０が冷却回路Ｗ２４を通じて冷却水流路Ｗ２２に接続されている。冷却回路Ｗ２４は、冷却水流路Ｗ２０を流れる冷却水を、ラジエータ４１を迂回させて冷却水流路Ｗ２２に流す流路である。
このような構成によれば、サーモスタット４３，８４が閉弁状態である場合には、ＣＡＣ８１で熱交換することにより加熱された冷却水がオイルクーラ５１に供給される。そのため、オイルクーラ５１では、この冷却水とオイルとの間で熱交換が行われることにより、オイルを加熱することができる。 In the cooling circuit 10 of the present embodiment, the cooling water flow path W20 is connected to the cooling water flow path W22 through the cooling circuit W24. The cooling circuit W24 is a flow path for flowing the cooling water flowing through the cooling water flow path W20 to the cooling water flow path W22 by bypassing the radiator 41.
According to such a configuration, when the thermostats 43 and 84 are in the valve closed state, the cooling water heated by heat exchange with the CAC 81 is supplied to the oil cooler 51. Therefore, in the oil cooler 51, the oil can be heated by exchanging heat between the cooling water and the oil.

＜他の実施形態＞
なお、各実施形態は、以下の形態にて実施することもできる。
・バイパス流路Ｗ４０には、冷却水の流通を規制する流通規制部として、逆止弁４５に代えて、電磁弁を設けてもよい。 <Other Embodiments>
In addition, each embodiment can also be implemented in the following embodiments.
A solenoid valve may be provided in the bypass flow path W40 instead of the check valve 45 as a distribution control unit that regulates the flow of cooling water.

・オイルクーラ５１により冷却されるオイルは、変速機５０に用いられるオイルに限らず、エンジン４０等の動力機に用いられるオイルであってもよい。
・冷却回路１０は、エンジン４０に代えて、車両に搭載された電動機や、電動機を駆動させるためのインバータ装置等を冷却するものであってもよい。 The oil cooled by the oil cooler 51 is not limited to the oil used in the transmission 50, but may be the oil used in a power machine such as an engine 40.
-The cooling circuit 10 may cool the electric motor mounted on the vehicle, the inverter device for driving the electric motor, or the like instead of the engine 40.

・冷却水用プレート７０には、通水抵抗付与部として、オフセットフィン以外の適宜の構造を設けてもよい。
・本開示は上記の具体例に限定されるものではない。上記の具体例に、当業者が適宜設計変更を加えたものも、本開示の特徴を備えている限り、本開示の範囲に包含される。前述した各具体例が備える各要素、及びその配置、条件、形状等は、例示したものに限定されるわけではなく適宜変更することができる。前述した各具体例が備える各要素は、技術的な矛盾が生じない限り、適宜組み合わせを変えることができる。 -The cooling water plate 70 may be provided with an appropriate structure other than the offset fin as a water passage resistance imparting portion.
-The present disclosure is not limited to the above specific examples. Specific examples described above with appropriate design changes by those skilled in the art are also included in the scope of the present disclosure as long as they have the features of the present disclosure. Each element included in each of the above-mentioned specific examples, and their arrangement, conditions, shape, and the like are not limited to those illustrated, and can be changed as appropriate. The combinations of the elements included in each of the above-mentioned specific examples can be appropriately changed as long as there is no technical contradiction.

Ｗ２０：冷却水流路（第１冷却水流路）
Ｗ２３，Ｗ５２：冷却水流路（第２冷却水流路）
Ｗ４０：バイパス流路
１０：冷却回路
４３：サーモスタット
４５：逆止弁（流通規制部）
５０：変速機
５１：オイルクーラ
７０：冷却水用プレート
７２ａ：第１冷却水流入路
７２ｂ：第１冷却水流出路
７３ａ：第２冷却水流入路
７３ｂ：第２冷却水流出路
７４：オフセットフィン（通水抵抗付与部）
７５：リブ
７７：内部流路
５１１ａ：第１冷却水流入口
５１１ｂ：第１冷却水流出口
５１２ａ：第２冷却水流入口
５１２ｂ：第２冷却水流出口 W20: Cooling water flow path (first cooling water flow path)
W23, W52: Cooling water flow path (second cooling water flow path)
W40: Bypass flow path 10: Cooling circuit 43: Thermostat 45: Check valve (Distribution regulation part)
50: Transmission 51: Oil cooler 70: Cooling water plate 72a: First cooling water inflow passage 72b: First cooling water outflow passage 73a: Second cooling water inflow passage 73b: Second cooling water outflow passage 74: Offset fin (through) Water resistance imparting part)
75: Rib 77: Internal flow path 511a: First cooling water inlet 511b: First cooling water outlet 512a: Second cooling water inlet 512b: Second cooling water outlet

Claims (12)

第１冷却水が流れる第１冷却水流路（Ｗ２０）と、
第２冷却水が流れる第２冷却水流路（Ｗ２３，Ｗ５２）と、
流入する冷却水の温度が所定温度以上であるときに前記第１冷却水流路における前記第１冷却水の流通を遮断するとともに、前記冷却水の温度が所定温度以上であるときに前記第１冷却水流路における前記第１冷却水の流通を許可するサーモスタット（４３）と、
オイルを加熱又は冷却するオイルクーラ（５１）と、を備え、
前記オイルクーラは、
前記第１冷却水流路を流れる前記第１冷却水が流入する第１冷却水流入口（５１１ａ）と、
前記第２冷却水流路を流れる前記第２冷却水が流入する第２冷却水流入口（５１２ａ）と、
前記第１冷却水流入口及び前記第２冷却水流入口の両方が接続される内部流路（７７）と、
前記内部流路に接続され、前記内部流路を流れた冷却水を前記第１冷却水流路に流出させる第１冷却水流出口（５１１ｂ）と、
前記内部流路に接続され、前記内部流路を流れた冷却水を前記第２冷却水流路に流出させる第２冷却水流出口（５１２ｂ）と、を有し、
前記サーモスタットにより前記第１冷却水流路における前記第１冷却水の流通が遮断されている場合、前記第２冷却水流入口のみを通じて前記内部流路に前記第２冷却水が流入し、
前記サーモスタットにより前記第１冷却水流路における前記第１冷却水の流通が許可されている場合、前記第１冷却水流入口及び前記第２冷却水流入口の両方を通じて前記内部流路に前記第１冷却水及び前記第２冷却水が流入し、
前記内部流路を流れる冷却水と前記オイルとの熱交換により前記オイルを加熱又は冷却する
冷却回路。 The first cooling water flow path (W20) through which the first cooling water flows and
The second cooling water flow path (W23, W52) through which the second cooling water flows, and
When the temperature of the inflowing cooling water is equal to or higher than a predetermined temperature, the flow of the first cooling water in the first cooling water flow path is blocked, and when the temperature of the cooling water is equal to or higher than the predetermined temperature, the first cooling is performed. A thermostat (43) that permits the flow of the first cooling water in the water flow path, and
The oil cooler (51) for heating or cooling the oil is provided.
The oil cooler
The first cooling water inflow port (511a) into which the first cooling water flowing through the first cooling water flow path flows in, and
A second cooling water inflow port (512a) into which the second cooling water flowing through the second cooling water flow path flows in, and
An internal flow path (77) to which both the first cooling water inlet and the second cooling water inlet are connected, and
A first cooling water outlet (511b) connected to the internal flow path and causing the cooling water flowing through the internal flow path to flow out to the first cooling water flow path .
It has a second cooling water outlet (512b) that is connected to the internal flow path and allows the cooling water that has flowed through the internal flow path to flow out to the second cooling water flow path.
When the flow of the first cooling water in the first cooling water flow path is blocked by the thermostat, the second cooling water flows into the internal flow path only through the second cooling water inflow port, and the second cooling water flows into the internal flow path.
When the thermostat permits the flow of the first cooling water in the first cooling water flow path, the first cooling water enters the internal flow path through both the first cooling water inflow port and the second cooling water inflow port. And the second cooling water flows in,
A cooling circuit that heats or cools the oil by heat exchange between the cooling water flowing through the internal flow path and the oil. 前記第１冷却水流入口を前記第１冷却水流路に接続するバイパス流路（Ｗ４０）と、
前記バイパス流路に設けられ、前記第１冷却水流入口から前記第１冷却水流路に向かう方向への前記第１冷却水の流通を規制する流通規制部（４５）と、
を更に備える請求項１に記載の冷却回路。 A bypass flow path (W40) that connects the first cooling water inlet to the first cooling water flow path, and
A distribution control unit (45) provided in the bypass flow path and restricting the flow of the first cooling water in the direction from the first cooling water inflow port to the first cooling water flow path.
The cooling circuit according to claim 1. 前記流通規制部は、逆止弁からなる
請求項２に記載の冷却回路。 The cooling circuit according to claim 2, wherein the distribution control unit includes a check valve. 前記オイルクーラでは、前記第１冷却水流入口から前記第１冷却水流出口に流れる冷却水の流れ方向と前記オイルの流れ方向とが対向している
請求項１〜３のいずれか一項に記載の冷却回路。 The oil cooler according to any one of claims 1 to 3, wherein the flow direction of the cooling water flowing from the first cooling water inlet to the first cooling water outlet and the flow direction of the oil face each other. Cooling circuit. 前記オイルは、車両の変速機（５０）に用いられるオイルである
請求項１〜４のいずれか一項に記載の冷却回路。 The cooling circuit according to any one of claims 1 to 4, wherein the oil is oil used for a vehicle transmission (50). 前記オイルは、車両の動力機に用いられるオイルである
請求項１〜４のいずれか一項に記載の冷却回路。 The cooling circuit according to any one of claims 1 to 4, wherein the oil is an oil used for a vehicle motor. 複数のプレートが積層して配置されることにより、オイルが流通するオイル流路と、冷却水が流通する冷却水流路とが交互に設けられるオイルクーラ（５１）であって、
前記冷却水流路を構成する冷却水用プレート（７０）は、
冷却水が流入する第１冷却水流入路（７２ａ）及び第２冷却水流入路（７３ａ）と、
前記第１冷却水流入路及び前記第２冷却水流入路の両方に接続される内部流路（７７）と、
前記内部流路から冷却水を流出させる第１冷却水流出路（７２ｂ）及び第２冷却水流出路（７３ｂ）と、を備え、
前記第１冷却水流入路への冷却水の流入が遮断される一方、前記第２冷却水流入路に冷却水が流入している場合、前記内部流路には、前記第２冷却水流入路のみを通じて冷却水が流入し、
前記第１冷却水流入路及び前記第２冷却水流入路の両方に冷却水が流入している場合、前記内部流路には、前記第１冷却水流入路及び前記第２冷却水流入路の両方を通じて冷却水が流入する
オイルクーラ。 An oil cooler (51) in which an oil flow path through which oil flows and a cooling water flow path through which cooling water flows are alternately provided by arranging a plurality of plates in a laminated manner.
The cooling water plate constituting the cooling water passage (70),
The first coolant inlet passage cooling water is you inflow (72a) and a second cooling water inlet channel and (73a),
An internal flow path (77) connected to both the first cooling water inflow path and the second cooling water inflow path, and
A first cooling water outflow passage (72b) and a second cooling water outflow passage (73b) for draining cooling water from the internal flow path are provided.
When the inflow of the cooling water into the first cooling water inflow passage is blocked, while the cooling water is flowing into the second cooling water inflow passage, the second cooling water inflow passage is connected to the internal flow path. Cooling water flows in only through
When the cooling water flows into both the first cooling water inflow passage and the second cooling water inflow passage, the internal flow path includes the first cooling water inflow passage and the second cooling water inflow passage. An oil cooler in which cooling water flows in through both. 前記冷却水用プレートは、
前記第１冷却水流入路から前記第１冷却水流出路に向かう第１方向に流れる際に前記冷却水が受ける通水抵抗と、前記第２冷却水流入路から前記第２冷却水流出路に向かう第２方向に流れる際に前記冷却水が受ける通水抵抗とを異ならせる通水抵抗付与部（７４）を更に有する
請求項７に記載のオイルクーラ。 The cooling water plate is
The water flow resistance that the cooling water receives when flowing in the first direction from the first cooling water inflow passage to the first cooling water outflow passage, and the second cooling water outflow passage from the second cooling water inflow passage to the second cooling water outflow passage. The oil cooler according to claim 7, further comprising a water flow resistance imparting portion (74) that makes the water flow resistance received by the cooling water different when flowing in two directions. 前記通水抵抗付与部は、部分的に切り起こされた切り起こし部が前記第１方向に複数形成されるとともに、前記第１方向に隣り合う前記切り起こし部同士が互いにオフセットして配置されているオフセットフィンである
請求項８に記載のオイルクーラ。 In the water flow resistance imparting portion, a plurality of partially cut-up portions are formed in the first direction, and the cut-up portions adjacent to each other in the first direction are arranged so as to be offset from each other. The oil cooler according to claim 8, which is an offset fin. 前記第１方向に直交する方向であって、隣り合う前記切り起こし部同士がオフセットしている方向を第２方向とし、前記第１方向及び前記第２方向を二等分する方向を第３方向とするとき、
前記第１冷却水流入路及び前記第１冷却水流出路は、前記第１方向において前記オフセットフィンを挟んで対向するように配置され、
前記第２冷却水流入路及び前記第２冷却水流出路は、前記第３方向において前記オフセットフィンを挟んで対向するように配置されている
請求項９に記載のオイルクーラ。 The direction orthogonal to the first direction, in which the adjacent cut-up portions are offset from each other, is the second direction, and the direction in which the first direction and the second direction are equally divided is the third direction. When
The first cooling water inflow passage and the first cooling water outflow passage are arranged so as to face each other with the offset fin in the first direction.
The oil cooler according to claim 9, wherein the second cooling water inflow passage and the second cooling water outflow passage are arranged so as to face each other with the offset fins interposed therebetween in the third direction. 前記第１冷却水流入路と前記第２冷却水流入路との間には、それらの間における前記冷却水の流れの短絡を抑制するリブ（７５）が形成されている
請求項７〜１０のいずれか一項に記載のオイルクーラ。 A rib (75) for suppressing a short circuit of the cooling water flow between the first cooling water inflow passage and the second cooling water inflow passage is formed. The oil cooler described in any one item. 前記第２冷却水流入路から前記第２冷却水流出路に向かう前記冷却水の流れ方向は、前記オイルの流れ方向に対向している
請求項７〜１１のいずれか一項に記載のオイルクーラ。
The oil cooler according to any one of claims 7 to 11, wherein the flow direction of the cooling water from the second cooling water inflow path to the second cooling water outflow path is opposed to the flow direction of the oil.
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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220155019A1 (en) * 2019-06-03 2022-05-19 Mitsubishi Electric Corporation Plate heat exchanger and heat transfer apparatus
JP7445204B2 (en) * 2020-03-25 2024-03-07 マツダ株式会社 Vehicle cooling system
CN113446390B (en) * 2021-07-22 2023-02-21 中国第一汽车股份有限公司 Transmission oil coolant circulation system, control method, vehicle, and storage medium

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3648665A (en) * 1969-07-11 1972-03-14 Dunlop Holdings Ltd Perforated structures
US4249491A (en) * 1979-09-04 1981-02-10 Kim Hotstart Manufacturing Co., Inc. Multiple liquid heating and circulating system
JPS6390765U (en) * 1986-11-29 1988-06-13
DE19715324A1 (en) * 1997-04-12 1998-10-15 Bayerische Motoren Werke Ag Heat exchangers for liquid heat exchangers
CA2260890A1 (en) * 1999-02-05 2000-08-05 Long Manufacturing Ltd. Self-enclosing heat exchangers
JP2010084751A (en) * 2008-09-02 2010-04-15 Nissan Motor Co Ltd Implementation of vehicle oil temperature control system
JP2010209736A (en) * 2009-03-09 2010-09-24 Toyota Motor Corp Engine warm-up control device
DE102010025576A1 (en) * 2010-06-29 2011-12-29 Behr Industry Gmbh & Co. Kg heat exchangers
US9239195B2 (en) * 2011-04-26 2016-01-19 Hyundai Motor Company Heat exchanger for vehicle
DE102012200746A1 (en) * 2012-01-19 2013-07-25 Ford Global Technologies, Llc Internal combustion engine having a pump arranged in the coolant circuit and method for operating such an internal combustion engine
JP6024217B2 (en) * 2012-06-01 2016-11-09 いすゞ自動車株式会社 Gearbox warm-up device
CN104595003B (en) * 2013-10-30 2019-01-15 北京宝沃汽车有限公司 Engine variable section cooling system
CN103953416B (en) * 2014-03-17 2016-05-04 东风朝阳朝柴动力有限公司 Diesel engine water temperature oil temperature control system device
JP6420140B2 (en) * 2014-12-26 2018-11-07 株式会社マーレ フィルターシステムズ Oil cooler
US10087793B2 (en) * 2015-01-26 2018-10-02 Modine Manufacturing Company Thermal management unit for vehicle powertrain
JP6398764B2 (en) * 2015-02-06 2018-10-03 株式会社デンソー Thermal management system for vehicles
JP6086132B2 (en) * 2015-07-28 2017-03-01 トヨタ自動車株式会社 Vehicle heat exchanger

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