JP2007016651A - Device for controlling oil temperature - Google Patents

Device for controlling oil temperature Download PDF

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Publication number
JP2007016651A
JP2007016651A JP2005197461A JP2005197461A JP2007016651A JP 2007016651 A JP2007016651 A JP 2007016651A JP 2005197461 A JP2005197461 A JP 2005197461A JP 2005197461 A JP2005197461 A JP 2005197461A JP 2007016651 A JP2007016651 A JP 2007016651A
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JP
Japan
Prior art keywords
cooling water
circuit
oil
engine
heat exchanger
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2005197461A
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Japanese (ja)
Inventor
Mitsuru Omura
充 大村
Original Assignee
Nissan Motor Co Ltd
日産自動車株式会社
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Publication date
Application filed by Nissan Motor Co Ltd, 日産自動車株式会社 filed Critical Nissan Motor Co Ltd
Priority to JP2005197461A priority Critical patent/JP2007016651A/en
Publication of JP2007016651A publication Critical patent/JP2007016651A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0412Cooling or heating; Control of temperature
    • F16H57/0413Controlled cooling or heating of lubricant; Temperature control therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H57/00General details of gearing
    • F16H57/04Features relating to lubrication or cooling or heating
    • F16H57/0412Cooling or heating; Control of temperature
    • F16H57/0415Air cooling or ventilation; Heat exchangers; Thermal insulations

Abstract

<P>PROBLEM TO BE SOLVED: To make a heat exchanger for ATF function as an oil warmer and an oil cooler without complicating a circuit structure. <P>SOLUTION: This device is provided with circulation circuits 3, 8, 14 of cooling water leading cooling water fed from an engine 1 to a radiator 10 including a heat exchanging part 13 and returning cooling water after passing the heat exchange part 13, a bypass circuit 9 branching off the circulating circuit 3 in an upstream of the heat exchanging part 13 and joining with the circulating circuit 14 in a downstream of the heat exchanging part 13, a flow rate change over means changing over flow rate of flow passing through the heat exchanging part 13 via the circulating circuit 8 and flow bypassing the heat exchanging part 13 via a bypass circuit 9 according to temperature of cooling water, and a heat exchanger 20 for oil provided in the circulating circuit 12 in a downstream of a confluence of the bypass circuit 9 and heating or cooling lubricating oil by heat exchange with cooling water. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an oil temperature control device that controls the temperature of lubricating oil used in an automatic transmission or the like.

  As this type of oil temperature control device, a device that heats or cools ATF by exchanging heat between engine coolant and lubricating oil (hereinafter referred to as ATF) used in an automatic transmission by an ATF heat exchanger is known. (For example, refer to Patent Document 1). In the apparatus described in Patent Document 1, a circuit in which cooling water from the engine passes through the radiator and returns to the engine and a circuit that bypasses the radiator and returns to the engine are formed, and the circuit is switched according to the engine cooling water temperature. Control engine coolant temperature. Separately, a circuit in which the cooling water from the engine passes through the ATF heat exchanger and returns to the engine and a circuit in which the cooling water that passes through the radiator passes through the ATF heat exchanger and returns to the engine are formed. The circuit is switched according to the engine coolant temperature to control the ATF oil temperature.

Japanese Patent Laying-Open No. 2004-232514 (FIG. 3)

  However, in the apparatus described in Patent Document 1, since a circuit for passing and bypassing the ATF heat exchanger is provided separately from the circuit for passing and bypassing the engine coolant through the radiator, the circuit configuration is complicated.

  An oil temperature control device according to the present invention is a cooling water circulation circuit for guiding cooling water delivered from an engine to a radiator having a heat exchanging portion and returning the cooling water after passing through the heat exchanging portion to the engine, and a heat exchanging portion. A bypass circuit that branches from the upstream circulation circuit and joins the circulation circuit downstream of the heat exchange section, and a flow and bypass circuit that passes through the heat exchange section via the circulation circuit according to the temperature of the cooling water. The flow rate ratio changing means for changing the flow rate ratio of the flow bypassing the heat exchanging section and the circulation circuit downstream of the junction of the bypass circuit and heating the lubricating oil by heat exchange with the cooling water or And an oil heat exchanger for cooling.

  According to the present invention, since the oil heat exchanger is arranged downstream of the junction of the circulation circuit and the bypass circuit of the radiator, the oil heat exchanger can be obtained without complicating the circuit configuration. A function as an oil warmer and a function as an oil cooler can be provided.

Hereinafter, an embodiment of an oil temperature control device according to the present invention will be described with reference to FIGS.
FIG. 1 is a diagram showing a configuration of an oil temperature control device according to the present embodiment. A cooling water channel 1a through which the cooling water flows is formed in the engine 1, and a water pump 2 for pumping the cooling water is provided on the upstream side of the cooling water channel 1a. The downstream side of the cooling water channel 1 a is connected to the thermostat 4 through the pipe 3 and is connected to the inlet of the air conditioning heater 6 (see FIG. 3) through the pipe 5 branched from the pipe 3. . The outlet portion of the heater 6 is connected to the water pump 2 via a pipe line 7.

  An upper tank 11 of the radiator 10 is connected to the thermostat 4 through a pipe line 8, and a lower tank 12 of the radiator 10 is connected to the thermostat 4 through a pipe line 9. The thermostat 4 is a valve that switches according to the engine coolant temperature, and changes the flow rate of the coolant flowing through the pipelines 8 and 9 by opening and closing the thermostat 4. For example, when the engine cooling water temperature T is equal to or higher than a predetermined value Ta, the thermostat 4 is opened and all the cooling water from the engine 1 is guided to the pipe 8 side, and when the engine cooling water temperature T is lower than the predetermined value Ta, the thermostat 4 is closed. All the cooling water from the engine 1 is guided to the pipe line 9 side.

  Note that a small amount of cooling water from the engine 1 may be guided to the pipe 9 side when the engine cooling water temperature T is equal to or higher than the predetermined value Ta. Similarly, when the engine coolant temperature T is lower than the predetermined value Ta, a small amount of coolant from the engine 1 may be guided to the pipe line 8 side. As the engine cooling water temperature T increases, the flow rate ratio flowing through the pipe line 8 can be gradually increased.

  The upper tank 11 and the lower tank 12 communicate with each other through the fin portion 13, and the cooling water guided to the upper tank 11 passes through the lower fin portion 13 and flows to the lower tank 12. Cooling air is blown to the fin portion 13 by a cooling fan (not shown), and the cooling water is cooled by heat exchange between the cooling air and the cooling water flowing through the fin portion 13. The lower tank 12 is connected to the water pump 2 via a pipe line 15. The lower tank 12 includes an ATF warmer / cooler 20 described later.

  In the present embodiment, lubricating oil (hereinafter referred to as ATF) used in an automatic transmission is heated or cooled by an ATF heat exchanger as an ATF warmer / cooler. Hereinafter, this point will be described.

  2 is a cross-sectional view taken along the line II-II in FIG. One end of the lower tank 12 is provided with an inflow portion 12a through which cooling water flows, and the other end is provided with an outflow portion 12b through which cooling water flows out. Pipe lines 9 and 14 are connected to the inflow portion 12a and the outflow portion 12b, respectively, and the cooling water bypassing the radiator (fin portion 13) flows through the lower tank 12 through the inflow portion 12a and the outflow portion 12b. Further, the cooling water that has passed through the fin portion 13 flows into the lower tank 12 from above, flows through the lower tank 12, and flows out from the outflow portion 12b.

  Between the inflow portion 12a and the outflow portion 12b in the lower tank 12, an ATF heat exchanger 20 is accommodated to form a so-called in-tank heat exchanger. An inflow portion 20 a through which ATF flows is provided through one end of the heat exchanger 20 through the lower tank 12, and an outflow portion 20 b through which ATF flows out is provided through the lower tank 12 at the other end. ATF flows through the heat exchanger 20 through the inflow portion 20a and the outflow portion 20b, and the ATF circulates between the automatic transmission (not shown) and the heat exchanger 20. At this time, the ATF flowing through the heat exchanger 20 is heat-exchanged with the cooling water flowing through the lower tank 12, and the ATF is heated or cooled by the cooling water.

Next, main operations of the oil temperature control device according to the present embodiment will be described.
FIG. 3 is a diagram schematically showing a circuit configuration of the oil temperature control device according to the present embodiment. The cooling water pumped from the water pump 2 branches in two after passing through the cooling water channel 1 a of the engine 1. One passes through the pipe 5, the heater 6, and the pipe 7 and returns to the engine 1. On the other hand, the flow is controlled by the thermostat 4 after passing through the pipe 3.

  Here, when the engine cooling water temperature T is lower than the predetermined value Ta, such as immediately after the engine is started, the thermostat 4 is closed, and the cooling water from the engine 1 is used for the thermostat 4, the conduit 9, the heat exchanger 20 in the lower tank 12, It returns to the engine 1 through the pipeline 14 sequentially. Due to the circulation of the cooling water, the cooling water temperature quickly rises, and the heat exchanger 20 exchanges heat between the cooling water and the ATF. At this time, the cooling water temperature rises earlier than the oil temperature, and the oil temperature is lower than the cooling water temperature. Therefore, the heat exchanger 20 functions as an ATF warmer, and the ATF oil temperature rises. As a result, the friction between the components in the automatic transmission is reduced, and fuel efficiency can be improved.

  On the other hand, when the warm-up operation is completed and the engine cooling water temperature T becomes equal to or higher than the predetermined value Ta, the thermostat 4 is opened, and the cooling water from the engine 1 passes through the thermostat 4, the pipe line 8, the fin portion 13 of the radiator 10, and heat exchange. Returning to the engine 1 through the vessel 20 and the pipe line 14 sequentially. In this case, since the cooling water is cooled by the heat exchange with the cooling air by the radiator 10, the cooling water temperature is suppressed within a certain range, and overheating of the engine 1 can be prevented. At this time, the heat exchanger 20 functions as an ATF cooler. In the heat exchanger 20, the ATF can be efficiently cooled because heat is exchanged between the cooling water just after passing through the radiator and the ATF. As a result, the heat exchanger 20 can be reduced in size.

According to the present embodiment, the following operational effects can be achieved.
(1) A circuit that passes through the fin portion 13 of the radiator 10 and returns to the engine 1 and a circuit that bypasses the fin portion 13 and returns to the engine 1 are formed. These circuits are switched by the thermostat 4 and pass through the fin portion 13. The ATF heat exchanger 20 is disposed at a location (lower tank 12) through which both the cooled water and the bypassed cooling water pass. As a result, the heat exchanger 20 can function as an ATF warmer when the cooling water temperature is low, and can function as an ATF cooler when the cooling water temperature is high. The single heat exchanger 20 can efficiently control the oil temperature of the ATF. can do.
(2) Since it is not necessary to provide a circuit for passing and bypassing the heat exchanger 20 separately from the circuit for passing and bypassing the engine coolant through the radiator 10, the number of pipes and the number of switching valves can be reduced. And the circuit configuration can be simplified.
(3) Since the heat exchanger 20 is provided in the lower tank 12 of the radiator 10, the number of parts can be reduced and the arrangement space can be saved. In this regard, when the heat exchanger 20 is provided outside the lower tank 12, it is necessary to add a pipeline from the lower tank 12 to the heat exchanger 20, the number of parts increases, and an arrangement space is also required. become.
(4) When the present invention is applied to an existing circuit in which an oil cooler is disposed downstream of the radiator 10, a pipeline bypassed from the upstream of the radiator 10 may be connected to the upstream side of the oil cooler. A function as an oil warmer can be easily provided. For example, for an oil cooler built in the lower tank 12, the oil cooler can be used as an oil warmer simply by additionally processing the inflow portion 12 a in the oil tank 12.

  In the above embodiment, the engine 1, the pipes 3, 8, the radiator 10, and the pipe 14 form a cooling water circulation circuit, and the pipe 9 forms a bypass circuit of the radiator 10, so that the radiator 10 Although the heat exchanger is disposed in the lower tank 12, it may be disposed on the downstream side of the heat exchange portion (fin portion 13) of the radiator 10 and on the downstream side of the junction of the bypass circuit 9. For example, the arrangement of the heat exchanger 20 is not limited to that described above, and the heat exchanger 20 may not be an in-tank type. In other words, the heat exchanger 20 is disposed downstream of the fin portion 13 of the circulation circuit, and the bypass circuit 9 is joined to the circulation circuit upstream of the heat exchanger 20 and downstream of the fin portion 13. For example, the circuit configuration is not limited to that described above.

  Although the flow rate ratio of the cooling water on the pipe line 8 side and the pipe line 9 side is changed by the thermostat 4, the flow rate ratio changing means is not limited to this. For example, an electromagnetic switching valve may be provided instead of the thermostat 4 and the electromagnetic switching valve may be switched according to the detected value of the coolant temperature detected by the temperature sensor. Although the ATF is heated or cooled by the heat exchanger 20, lubricating oil other than ATF (for example, mission oil for MT vehicles) may be heated or cooled.

  That is, the present invention is not limited to the oil temperature control according to the embodiment as long as the features and functions of the present invention can be realized. The above description is merely an example, and when interpreting the invention, there is no limitation or restriction on the correspondence between the items described in the embodiment and the items described in the claims.

The figure which shows the structure of the oil temperature control apparatus which concerns on embodiment of this invention. II-II sectional view taken on the line of FIG. The figure which shows typically the circuit structure of the oil temperature control apparatus which concerns on this Embodiment.

Explanation of symbols

1 Engine 4 Thermostat 3, 8, 9, 14 Pipe 10 Radiator 12 Lower tank 13 Fin section 20 ATF heat exchanger 12a Inflow section 12b Outflow section

Claims (2)

  1. Cooling water sent out from the engine is guided to a radiator having a heat exchanging section, and a cooling water circulation circuit for returning the cooling water after passing through the heat exchanging section to the engine
    A bypass circuit branched from the circulation circuit on the upstream side of the heat exchange unit and joined to the circulation circuit on the downstream side of the heat exchange unit;
    According to the temperature of the cooling water, the flow rate ratio changing means for changing the flow rate ratio of the flow passing through the heat exchange unit via the circulation circuit and the flow bypassing the heat exchange unit via the bypass circuit;
    An oil temperature control device, comprising: an oil heat exchanger disposed in the circulation circuit downstream of the junction of the bypass circuit and configured to heat or cool the lubricating oil by heat exchange with cooling water. .
  2. In the oil temperature control device according to claim 1,
    The oil heat exchanger is accommodated in a lower tank of a radiator downstream of the heat exchange unit,
    One end of the lower tank is provided with an inflow part through which the cooling water that has passed through the bypass circuit flows into the lower tank, and the other end is provided with an outflow part through which the cooling water in the lower tank flows out. Oil temperature control device.
JP2005197461A 2005-07-06 2005-07-06 Device for controlling oil temperature Pending JP2007016651A (en)

Priority Applications (1)

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JP2005197461A JP2007016651A (en) 2005-07-06 2005-07-06 Device for controlling oil temperature

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JP2005197461A JP2007016651A (en) 2005-07-06 2005-07-06 Device for controlling oil temperature

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JP2007016651A true JP2007016651A (en) 2007-01-25

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101047752B1 (en) 2009-11-05 2011-07-07 현대자동차주식회사 Valves for Heat Exchange of Fluids
CN102403090A (en) * 2011-11-16 2012-04-04 无锡马山永红换热器有限公司 Oil-water cooler
KR101134974B1 (en) * 2009-11-23 2012-04-09 현대자동차주식회사 Coolant control system of engine
CN103422968A (en) * 2013-09-10 2013-12-04 无锡市豫达换热器有限公司 Efficient and energy-saving heat exchanger based on embedded technology
JP2014081251A (en) * 2012-10-16 2014-05-08 Sanki Eng Co Ltd Water cooled type transmission oil heat exchanger test system
US20160290189A1 (en) * 2013-03-19 2016-10-06 Yanmar Co., Ltd. Internal combustion engine and cogeneration system
US9796244B2 (en) 2014-01-17 2017-10-24 Honda Motor Co., Ltd. Thermal management system for a vehicle and method
CN109483181A (en) * 2019-01-08 2019-03-19 南京红鼎汽车零部件有限公司 Speed-changer tube cooler and the speed-changer tube cooler technological process of production

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0583323U (en) * 1992-04-17 1993-11-12 ダイハツ工業株式会社 Automatic transmission oil cooler
JPH07259971A (en) * 1994-03-25 1995-10-13 Nissan Diesel Motor Co Ltd Torque converter for construction machine and oil cooling device for hydraulic equipment
JP2002349790A (en) * 2001-05-29 2002-12-04 Toyota Motor Corp Oil temperature control method and device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0583323U (en) * 1992-04-17 1993-11-12 ダイハツ工業株式会社 Automatic transmission oil cooler
JPH07259971A (en) * 1994-03-25 1995-10-13 Nissan Diesel Motor Co Ltd Torque converter for construction machine and oil cooling device for hydraulic equipment
JP2002349790A (en) * 2001-05-29 2002-12-04 Toyota Motor Corp Oil temperature control method and device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101047752B1 (en) 2009-11-05 2011-07-07 현대자동차주식회사 Valves for Heat Exchange of Fluids
KR101134974B1 (en) * 2009-11-23 2012-04-09 현대자동차주식회사 Coolant control system of engine
CN102403090A (en) * 2011-11-16 2012-04-04 无锡马山永红换热器有限公司 Oil-water cooler
JP2014081251A (en) * 2012-10-16 2014-05-08 Sanki Eng Co Ltd Water cooled type transmission oil heat exchanger test system
US20160290189A1 (en) * 2013-03-19 2016-10-06 Yanmar Co., Ltd. Internal combustion engine and cogeneration system
US10180090B2 (en) * 2013-03-19 2019-01-15 Yanmar Co., Ltd. Internal combustion engine and cogeneration system
CN103422968A (en) * 2013-09-10 2013-12-04 无锡市豫达换热器有限公司 Efficient and energy-saving heat exchanger based on embedded technology
US9796244B2 (en) 2014-01-17 2017-10-24 Honda Motor Co., Ltd. Thermal management system for a vehicle and method
CN109483181A (en) * 2019-01-08 2019-03-19 南京红鼎汽车零部件有限公司 Speed-changer tube cooler and the speed-changer tube cooler technological process of production

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