JP2014081251A - Water cooled type transmission oil heat exchanger test system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a test system which can execute a performance test of a water cooled type transmission oil heat exchanger relatively easily.SOLUTION: A water cooled type transmission oil heat exchanger test system 1 executing a performance test of a water cooled type transmission oil heat exchanger 2 cooling ATF (automatic transmission fluid) using LLC (long life coolant) of a radiator comprises a coolant circulation device 3 circulating and supplying the LLC to upstream of the water cooled type transmission oil heat exchanger 2, and an oil circulation device 4 circulating and supplying the ATF to downstream of the water cooled type transmission oil heat exchanger. The coolant circulation device 3 comprises a coolant side pump 11 circulating the LLC, a coolant thermometer 12 measuring the temperature of the LLC, a coolant side cooling system 13 cooling the LLC, and a coolant side electric heater 14 heating the LLC. The oil circulation device 4 comprises an oil side pump 41 circulating the ATF, an oil thermometer 42 measuring the temperature of the ATF, an oil side cooling system 43 cooling the ATF, and an oil side electric heater 44 heating the ATF.

Description

  The present invention is applied to a transmission oil such as an automatic transmission fluid (hereinafter also referred to as ATF) used for a transmission such as an automatic transmission mounted on an automobile or the like and responsible for a part of a drive system from a prime mover. The present invention relates to a water-cooled transmission oil heat exchanger test system for performing a performance test of a water-cooled transmission oil heat exchanger that cools using cooling water of a radiator for cooling.

  Conventionally, it has been known to test the performance of a prime mover by mounting an electric motor (hereinafter collectively referred to as a prime mover) on an engine or a hybrid system or an electric vehicle on a test bench in a test room before being mounted on a vehicle. (For example, refer to Patent Document 1). In addition, when a part of the transmission system to the wheels that transmit driving force to the ground is connected to such a prime mover as part of the drive system, and when testing the prime mover and the transmission, etc., the water-cooled transmission oil heat The performance of the exchanger may also be tested. By the way, this transmission oil is called automatic transmission fluid (ATF) used in automatic transmissions that are currently popular, but the same applies to oil used in manual transmissions.

  As for this water-cooled transmission oil heat exchanger, there are many actual vehicle-mounted types that are integrated with a radiator that is a heat exchanger with the outside air of engine cooling water of an engine that is an internal combustion engine (for example, Patent Document 2). However, with the recent spread of hybrid prime movers and electric vehicles, separate types are also emerging.

JP-A-9-257653 JP 2007-16651 A

  However, even if it is sufficient to test only the performance of the water-cooled transmission oil heat exchanger, the prime mover and the transmission are prepared and driven, and the exhaust gas discharged from the engine is discharged. There is a concern that the preparation of various facilities would take too much effort and cost.

  In addition, a test facility equipped with a test room may have a motor bench test room for other purposes, a chassis dynamo test room, etc. The cooling system using this cooling water is easy to use.

  The water-cooled transmission oil heat exchanger heats the ATF optimally at the start by heating from the cooling water side in order to efficiently transmit driving force such as ATF and prevent oil deterioration, and drive with high load from the prime mover. In order to prevent deterioration due to high temperature of ATF during power transmission and to prevent reduction in drive transmission efficiency, it must be cooled, but a test system that accurately tests this under various conditions using industrial water cooling water on a test bench is There was no.

  The present invention has been made to solve the above-described problems and the like, and its purpose is to provide a water-cooled transmission that can perform a performance test of a water-cooled transmission oil heat exchanger relatively easily. It is to provide a machine oil heat exchanger test system.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A water-cooled transmission oil heat exchanger capable of cooling transmission oil used in a transmission that forms part of a drive system that transmits the shaft rotational force of the prime mover to the vehicle driving force to the ground;
A cooling water circulation device attached to a test chamber capable of circulating and supplying cooling water to a primary side of the water-cooled transmission oil heat exchanger;
An oil circulation device attached to a test chamber capable of circulating and supplying transmission oil to the secondary side of the water-cooled transmission oil heat exchanger,
In the water-cooled transmission oil heat exchanger test system for performing the performance test of the water-cooled transmission oil heat exchanger,
The cooling water circulation device is
A cooling water side pump for circulating the cooling water;
A cooling water thermometer capable of measuring the temperature of the cooling water;
A cooling water side cooling means capable of cooling the cooling water;
A cooling water side heating means capable of heating the cooling water,
The oil circulation device is
An oil-side pump for circulating transmission oil;
An oil thermometer capable of measuring the temperature of transmission oil,
Oil-side cooling means capable of cooling transmission oil;
A water-cooled transmission oil heat exchanger test system comprising an oil side heating means capable of heating transmission oil.

  According to means 1, a water-cooled transmission oil heat exchanger test capable of creating a test condition (temperature condition) for cooling water with a cooling water circulation device and a test condition (temperature condition) for transmission oil with an oil circulation device The system allows a single test of the water-cooled transmission oil heat exchanger. Therefore, it is necessary to prepare a prime mover, a transmission, equipment for installing the prime mover and the transmission, equipment for exhausting exhaust gas when the engine is a prime mover, fuel and electric supply for driving the prime mover, etc. The performance test of the water-cooled transmission oil heat exchanger can be performed relatively smoothly and simply. Therefore, the labor and cost required for the performance test of the water-cooled transmission oil heat exchanger can be reduced, and the opportunity for the performance test of the water-cooled transmission oil heat exchanger is refrained from concerns of labor and cost. Can be prevented from going smoothly. Compared with the case where the prime mover is actually moved to adjust the temperature and flow rate of the transmission oil to the desired test conditions, such adjustment can be performed relatively quickly and accurately, and the test efficiency and test can be performed. The accuracy can be improved.

Mean 2. The cooling water circulation device is
The cooling water side pump, the cooling water thermometer, the cooling water side cooling means, the cooling water side heating means, and the cooling water side heat exchanger, a water-cooled transmission oil heat exchange as a specimen Through the connection coupling with the cooling water side of the vessel, respectively, in the middle of the pipe to be connected,
The cooling water side heat exchanger is a heat exchanger that exchanges heat between cooling water circulating through the cooling water circulation device and industrial water cooled by a building-side cooling heat source,
The cooling water circulation device further includes a high-temperature sealed expansion tank in the case of high-temperature cooling water, which is different from the cooling water circulation expansion system at low temperatures, in order to adjust the internal pressure of the pipe that is a closed system,
In the case of high-temperature cooling water, the water-cooled transmission oil heat exchanger test system according to means 1, wherein high-temperature water at 100 ° C. or higher can be circulated by switching to the high-temperature sealed expansion tank.

  According to the means 2, in the case of actual vehicle mounting, as cooling ensuring in the case of high load, cooling of high-temperature solids such as the combustion chamber of the prime mover and power device, and cooling of the oil system of the auxiliary equipment, In order to avoid cooling failure due to boiling, a mechanism for circulating cooling water as high-temperature water is secured.

  However, in the case of cooling water in a test chamber, an expansion system using an open expansion tank is connected to a reference point on the pump suction side in a normal application. However, the height of the expansion tank is low, and 100 in a cooling water pipe close to atmospheric pressure. When the water temperature becomes close to 0 ° C., it begins to boil and becomes a gas-liquid mixed phase flow with water vapor, and the pump bites the gas and cannot be transported. The normal cooling water circulation system does not cope with high temperature water in this way.

  In this respect, if the mechanism of the means 2 is provided, the actual cooling conditions performed in the on-vehicle cooling water system can be changed to a test apparatus or a tester due to jetting into the expansion tank, bursting of the cooling water piping that becomes a sealed system, or cooling failure. It can be reproduced without being in a dangerous state such as a broken specimen.

Means 3. The cooling water side cooling means is
A first industrial water flow rate adjusting device for adjusting the flow rate of industrial water supplied to the primary side of the cooling water side heat exchanger;
A cooling water flow rate adjusting device for adjusting the flow rate of cooling water supplied to the secondary side of the cooling water side heat exchanger;
The oil-side cooling means is
An oil-side heat exchanger for exchanging heat between transmission oil circulating through the oil circulation device and industrial water;
A second industrial water flow rate adjusting device for adjusting the flow rate of industrial water supplied to the primary side of the oil side heat exchanger;
The water-cooled transmission oil heat exchanger test according to claim 2, further comprising an oil flow rate adjusting device for adjusting a flow rate of transmission oil supplied to a secondary side of the oil side heat exchanger. system.

  According to the means 3, the cooling water is supplied to either the industrial water side which is the primary side of the cooling water side heat exchanger (oil side heat exchanger) or the cooling water side (transmission oil side) which is the secondary side. It is configured to be able to adjust how much (transmission oil) is cooled by industrial water, and in turn, adjust the temperature of the cooling water (transmission oil). For this reason, when the temperature of the cooling water or transmission oil is relatively high, such as 90 ° C. or higher, corresponding to high-temperature water (water temperature at which atmospheric pressure may cause boiling in the pipe), Adjust the temperature with the oil flow control device (adjust the flow rate of cooling water and transmission oil flowing into the cooling water side heat exchanger and oil side heat exchanger), and then use the cooling water side heat exchanger and oil side heat. Industrial water can flow into the exchanger with a maximum amount. In this case, the industrial water on the primary side of the cooling water side heat exchanger or oil side heat exchanger will not be retained by adjusting the flow rate, but will be replaced while always supplying cold heat. Cooling in industrial water systems where industrial water is heated as close as possible to the high temperature water that is likely to boil in the pipe at normal pressure, especially for industrial water systems that do not take measures against the expansion pressure of high temperature water It is possible to avoid a situation where boiling occurs due to heat exchange with water or transmission oil.

  On the other hand, when the temperature of the cooling water or transmission oil is relatively low, for example, about 80 ° C. or less, the flow rate of industrial water flowing into the cooling water side heat exchanger or the oil side heat exchanger can be adjusted. The temperature of cooling water and transmission oil is adjusted. In this case, a cooling tower for exchanging heat with the atmosphere, a cooling device for industrial water that uses a refrigerator depending on the temperature, and a circulating transfer means for industrial water with the cooling water side cooling means and the oil side cooling means of this device. The flow rate of an industrial water pump, that is, the pump power can be reduced, and the flow rate can be further reduced to increase the temperature difference of industrial water at the inlet and outlet. Therefore, cooling with a heat exchanger or cooling tower increases the approach temperature, and the refrigerator In the case of cooling by means of this, the temperature of the condenser can be increased and the energy required for cooling can be reduced. Therefore, energy saving can be achieved.

Means 4. The cooling water circulation device is
Equipped with a cooling water flow controller
In the cooling water side flow controller,
Calculate and output the operation amount for the first industrial water flow control device, and calculate and output the operation amount for the cooling water flow control device,
A determination signal that receives the measured value of the cooling water thermometer, compares the operation selection set temperature set in the cooling side flow rate controller with the measured value of the cooling water thermometer, and uses the operation selection set temperature as a threshold value And
Based on the determination signal, one of the first industrial water flow rate control device or the cooling water flow rate control device is operated based on the deviation between the measured value input signal and the cooling water temperature setting temperature set for testing. The flow rate adjusting device is proportionally controlled by the output signal, and on the other hand, the valve opening degree of the flow rate adjusting device is quantitatively adjusted to flow the entire amount to the cooling water side heat exchanger,
The oil circulation device is
With oil side flow controller,
In the oil side flow rate controller,
Calculate and output the operation amount for the second industrial water flow control device, and calculate and output the operation amount for the oil flow control device,
The measurement value of the oil thermometer is input, and the operation selection set temperature set in the oil side flow controller is compared with the measurement value of the oil thermometer, and a judgment signal is output with the operation selection set temperature as a threshold value. ,
Based on the determination signal, one of the second industrial water flow control device or the oil flow control device has an output calculated based on the deviation between the measured value input signal and the oil temperature setting temperature set for testing. Based on the signal, the flow rate adjusting device is proportionally controlled, and on the other side, the valve opening degree of the flow rate adjusting device is quantitatively adjusted to flow the entire amount to the oil side heat exchanger,
The cooling water side flow controller and the oil side flow controller are each set with an operation selection set temperature for preventing cavitation due to boiling of the cooling water in the industrial water pipe,
When the temperature of the cooling water measured by the cooling water thermometer is lower than the operation selection set temperature, the cooling water-side flow rate controller has a maximum amount of cooling water discharged from the water-cooled transmission oil heat exchanger. By adjusting the cooling water flow rate adjusting device to a fixed position so as to flow into the cooling water side heat exchanger in a limited amount, and by proportionally adjusting the industrial water flow rate by the first industrial water flow rate adjusting device, The cooling water temperature is adjusted,
When the temperature of the cooling water measured by the cooling water thermometer is equal to or higher than the operation selection set temperature, the cooling water side flow rate controller flows the industrial water into the cooling water side heat exchanger with a maximum amount. The temperature of the cooling water is adjusted by adjusting the flow rate of the cooling water to the cooling water side heat exchanger by the cooling water flow rate adjusting device proportionally and adjusting the first industrial water flow rate adjusting device to a fixed position. Adjustments are made,
When the temperature of the transmission oil measured by the oil thermometer is lower than the operation selection set temperature, the oil-side flow rate controller causes the transmission oil to flow into the oil-side heat exchanger with a maximum amount. As described above, adjusting the oil flow rate adjusting device to a fixed position, and adjusting the flow rate of industrial water by the second industrial water flow rate adjusting device in proportion control, the temperature adjustment of the transmission oil is performed,
When the temperature of the transmission oil measured by the oil thermometer is equal to or higher than the operation selection set temperature, the oil-side flow rate controller controls the industrial water to flow into the oil-side heat exchanger with a maximum amount. The temperature of the transmission oil can be adjusted by adjusting the second industrial water flow adjustment device to a fixed position and proportionally adjusting the flow rate of the transmission oil to the oil-side heat exchanger by the oil flow adjustment device. The water-cooled transmission oil heat exchanger test system according to claim 3, wherein the test system is performed.

  According to the means 4, the temperature adjustment of the cooling water (transmission oil) is performed by either the first industrial water flow adjustment device (second industrial water flow adjustment device) or the cooling water flow adjustment device (oil flow adjustment device). It is possible to perform control by automatic control after switching at least as a determination signal. Therefore, the operation by the operator can be simplified, and the cooling water and transmission oil can be cooled over the operation selection set temperature (temperature at which part of the cooling water or industrial water can become high temperature water). And measures to respond to changes in the temperature of transmission oil can be avoided, and damage to the equipment due to inadequate cooling can be avoided. Can be done.

Means 5. The cooling water side heating means and the oil side heating means are each constituted by an electric heater,
5. The water-cooled transmission oil heat according to any one of means 1 to 4, wherein the maximum heating capacity of the cooling water side heating means is 30% to 60% of the maximum heating capacity of the oil side heating means. Exchanger test system.

  According to the means 5, it is possible to reliably and smoothly cope with various test conditions such as when starting the engine while reducing the size and cost of the cooling water side heating means.

It is explanatory drawing which shows schematic structure of a water-cooled transmission oil heat exchanger test system. It is explanatory drawing which shows the state of the control valve under various conditions.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIG. 1, a water-cooled transmission oil heat exchanger test system 1 includes an automatic transmission fluid (hereinafter referred to as “transmission fluid”) as transmission oil used in an automatic transmission (hereinafter referred to as “AT”) as a transmission. A system for performing a performance test of a water-cooled transmission oil heat exchanger 2 that uses a long-life coolant (hereinafter referred to as “LLC”) that is a cooling water of a radiator. is there. That is, the water-cooled transmission oil heat exchanger test system 1 includes a cooling water circulation device 3 that can circulate and supply LLC to the primary side of the water-cooled transmission oil heat exchanger 2 and a water-cooled transmission oil heat heat. An oil circulation device 4 that can circulate and supply ATF to the secondary side of the exchanger 2 is formed by a group of pipes fixed to the chambers, and is a water-cooled transmission oil heat exchanger temporarily with tapping and flexible tubes. 2 is connected to the primary side and the secondary side respectively, and the cooling water circulation device 3 can create LLC test conditions (temperature conditions), and the oil circulation device 4 can create ATF test conditions (temperature conditions). Has been.

  The cooling water circulation device 3 includes a cooling water side pump 11 for circulating the LLC, a cooling water thermometer 12 capable of measuring the temperature of the LLC, and a cooling water side cooling mechanism as a cooling water side cooling means capable of cooling the LLC. 13, a cooling water side electric heater 14 as a cooling water side heating means capable of heating the LLC, and two tappings (couplings) for connecting to the primary side of the water cooling type transmission oil heat exchanger 2 are circulated. It is connected by piping so that it is possible. Further, at the upper end of the expansion pipe branched from the pipe upstream of the suction port of the cooling water side pump 11, there is a cooling water side open expansion tank 15 and a high temperature branched from the middle of the expansion pipe and connected to the branch expansion pipe. A closed expansion tank 16 for cooling and a cooling water expansion switching ball valve 24a are provided on the downstream side of the expansion pipe branch of the branch expansion pipe.

  The cooling water side cooling mechanism 13 is supplied to the primary side of the cooling water side heat exchanger 17 and the cooling water side heat exchanger 17 that exchanges heat between the LLC circulating through the cooling water circulation device 3 and the industrial water. Cooling water flow rate adjustment for adjusting the flow rate of LLC supplied to the secondary side of the first industrial water control valve 18 and the cooling water side heat exchanger 17 as a first industrial water flow rate adjusting device for adjusting the flow rate of industrial water A first cooling water control valve 19 and a second cooling water control valve 20 as an apparatus are provided. That is, the cooling water side cooling mechanism 13 includes the cooling water side heat exchanger 17 and thereby has a cooling function equal to or higher than the cooling capacity of the radiator. Furthermore, by setting the first industrial water control valve 18, the first cooling water control valve 19, and the second cooling water control valve 20, setting of how much the LLC is cooled by the cooling water side heat exchanger 17 (as a result) , LLC temperature adjustment) can be performed, the cooling condition (speed) of the radiator can be imitated, and the LLC temperature such as the initial test state can be appropriately set.

  Further, it is assumed that the cooling water circulation device 3 includes the cooling water side electric heater 14 so that the LLC can be heated by heat exchange with the engine oil when the water cooling type transmission oil heat exchanger 2 is actually mounted on the vehicle. In addition, the assumed LLC temperature condition can be realized in the cooling water circulation device 3. Therefore, for example, it is possible to perform a performance test or the like of the water-cooled transmission oil heat exchanger 2 in a situation where the LLC is warmed before the ATF when the engine is started. In addition, the LLC temperature also rises when the cooling water side pump 11 is driven. Therefore, the LLC heated by the cooling water side electric heater 14 and the cooling water side pump 11 (the cooling water side electric heater 14 may not be operated depending on the test contents and the temperature condition of the LLC) is used as the cooling water side cooling mechanism 13. The temperature condition of LLC which assumed the real vehicle is realizable by cooling it, adjusting by. The first industrial water control valve 18, the first cooling water control valve 19, and the second cooling water control valve 20 are each constituted by a two-way valve, and in particular, the first cooling water control valve 19 and the second cooling water. The control valve 20 is configured to be able to control the flow rate while switching the flow path by operating in reverse.

  Further, the cooling water circulation device 3 includes a cooling water side forward pipe 21 that supplies the LLC cooled by the cooling water side heat exchanger 17 to the water cooling type transmission oil heat exchanger 2, and a water cooling type transmission oil heat exchanger. And a cooling water side reflux pipe 22 for returning the LLC discharged from 2 to the cooling water side heat exchanger 17 side. The cooling water side pump 11 is provided in the cooling water side forward pipe 21. The cooling water thermometer 12 is provided in a portion of the cooling water side forward pipe 21 between the cooling water side pump 11 and the water cooling type transmission oil heat exchanger 2. The cooling water side electric heater 14 is provided in the cooling water side reflux pipe 22.

  Of the cooling water side forward pipe 21, a portion between the cooling water side pump 11 and the cooling water side heat exchanger 17, and of the cooling water side return pipe 22, the cooling water side electric heater 14 and the cooling water are used. A cooling water side first bypass passage 23 is provided for connecting a portion between the side heat exchanger 17 and the side heat exchanger 17. The first cooling water control valve 19 is provided in the cooling water side first bypass passage 23, and the second cooling water control valve 20 is the cooling water side first bypass passage 23 in the cooling water side forward pipe 21. And the cooling water side heat exchanger 17.

  Further, the cooling water side forward pipe 21 is connected to a portion having a low absolute pressure in the pipe on the pump suction side between the cooling water side pump 11 and the cooling water side first bypass passage 23, and the cooling water A cooling water side expansion pipe 24 that connects the side open expansion tank 15 is provided, and the high temperature sealed expansion tank 16 is connected to a branch expansion pipe that further branches from the middle of the cooling water side expansion pipe 24. Yes. A cooling water expansion switching ball valve 24a is provided between the cooling water side expansion pipe 15 and the cooling water side open expansion tank 15 on the downstream side of the branch expansion pipe branch of the cooling water side expansion pipe. The cooling water expansion switching ball valve 24a is opened when the cooling water temperature is lower than the operation switching set temperature (for example, 90 ° C.), whereby the cooling water side expansion pipe is on the pump suction side by the atmospheric pressure and the position head. The pressure at the site reference point having a low absolute pressure in the pipe is defined to cope with expansion and contraction due to the temperature of the cooling water in the pipe on the basis of the atmospheric pressure. As a result, the expansion of the LLC is absorbed by the cooling water side open expansion tank 15, or the water is filled with the cooling water side open expansion tank 15 before the test or after the test. Fill the circulation path.

  In addition, when the LLC temperature is equal to or higher than the operation switching set temperature (for example, 90 ° C.), the cooling water side open type is used to prevent problems caused by cavitation due to partial boiling in the piping that cannot be suppressed by the atmospheric pressure + position head The cooling water expansion switching ball valve 24a in the middle of the cooling water side expansion pipe 24 is used to apply the pressure of the high-temperature sealed expansion tank 16 in which the pressure on the diaphragm is set to pressurize the predetermined pressure further than the expansion tank 15. After closing the valve, the on-off valve (not shown) installed on the branch expansion pipe is turned from closed to open, so that the pressure of the high-temperature sealed expansion tank 16 can be applied to the cooling water circulation pipe and does not boil even at 100 ° C. High temperature water can be formed in the pipe. Thereby, the cooling water side expansion pipe 24 is closed by the cooling water expansion switching ball valve 24a, the cooling water pressure in the LLC pipe is increased, and the expansion of the LLC in the circulation path such as the cooling water side forward pipe 21 is performed. It will be absorbed by the high temperature sealed expansion tank 16.

  In addition, the cooling water circulation device 3 includes a portion of the cooling water side forward pipe 21 between the cooling water side pump 11 (cooling water thermometer 12) and the water cooling type transmission oil heat exchanger 2, and cooling. A cooling water side second bypass passage 25 that connects a portion of the water side reflux pipe 22 between the cooling water side electric heater 14 and the water cooling type transmission oil heat exchanger 2 is provided. The cooling water side second bypass passage 25 and the cooling water side return pipe 22 in the vicinity of the cooling water side second bypass passage 25 are each provided with a manual cooling water side flow rate adjustment valve 26. A cooling water flow meter 27 for measuring the flow rate of LLC is provided between the cooling water side second bypass passage 25 and the water cooling type transmission oil heat exchanger 2 in the cooling water side reflux pipe 22. A cooling water side air vent pipe 28 for air venting is provided. In addition, the cooling water circulation device 3 is provided with pressure gauges at a plurality of locations. In the present embodiment, the flow rate adjustment and pressure adjustment of the LLC are performed by adjusting the cooling water side pump 11 and the cooling water side flow rate adjustment valve 26.

  Further, on the primary side of the cooling water side heat exchanger 17, there are a first outgoing side industrial water pipe 31 for supplying industrial water from the industrial water supply to the cooling water side heat exchanger 17, and the cooling water side heat exchanger 17. A first reflux side industrial water pipe 32 for returning the industrial water discharged from the factory to the industrial water supply is connected, and the first industrial water control valve 18 is provided in the first reflux side industrial water pipe 32. .

  In this embodiment, as shown in FIG. 2, according to the situation, the first industrial water control valve 18, the first cooling water control valve 19, the second cooling water control valve 20, and the cooling water side electric heater 14 Operation control is performed. More specifically, when the temperature of LLC measured by the cooling water thermometer 12 is lower than the operation switching set temperature (90 ° C. in this example) inputted as a set value to the cooling water side flow rate controller 34 (FIG. In the case of the first temperature control 2), the first cooling water is used so that the LLC discharged from the primary side of the water-cooled transmission oil heat exchanger 2 flows into the cooling water-side heat exchanger 17 with a maximum amount. The measurement signal of the cooling water thermometer 12 is processed to output a steady value so that the control valve 19 is fully closed and the second cooling water control valve 20 is fully opened, and the first industrial water control valve 18 is mainly used. Is calculated based on the measurement signal of the cooling water thermometer 12, and the output signal output by calculating the deviation from the cooling water set temperature value input to the cooling water side flow rate controller 34 for each test. Proportionally controlled, LLC temperature adjustment So that the crack.

  On the other hand, when the LLC temperature measured by the cooling water thermometer 12 is 90 ° C. or higher (in the case of the second temperature control in FIG. 2), the cooling water flow controller 34 first measures the operation switching set temperature and the measured temperature. The cooling water temperature is compared and calculated to indicate that it is the second temperature control, and when the cooling water expansion switching ball valve 24a is an automatic valve, a signal for closing this is output, and the opening and closing of the branch expansion pipe (not shown) is output. The valve is then opened. When the cooling water expansion switching ball valve 24a is a manual valve, an operator manually closes the cooling water expansion switching ball valve 24a in accordance with an indication that the second temperature control is being performed, and opens a branch expansion pipe opening / closing valve (not shown). Then open manually. Thereafter, the LLC discharged from the primary side of the water-cooled transmission oil heat exchanger 2 is mainly subjected to cooling water side heat exchange while the flow rate is controlled by the first cooling water control valve 19 and the second cooling water control valve 20. The first cooling water control valve 19 and the second cooling water control valve 20 are operated in reverse so as to flow into the vessel 17, and the respective openings are based on the measurement signal of the cooling water thermometer 12. Proportional control is performed by an output signal that is output by calculating a deviation from the test coolant water set temperature value that is input to the coolant flow rate controller 34 for each test. Then, the measurement signal of the cooling water thermometer 12 is processed to output a steady value so that the opening degree of the first industrial water control valve 18 is fully opened, and the temperature of the LLC is adjusted. Yes.

  In this embodiment, when the temperature of the LLC is manually adjusted, the first industrial water control valve 18 or the first cooling water control valve 19 or the second cooling water control valve 20 is used for switching. The input device (not shown) is provided, and the switching is performed by the operator operating the input device. Although not shown, the water-cooled transmission oil heat exchanger test system 1 is provided with a touch panel that can be operated by an operator, and the temperature of the LLC is displayed on the screen. The output of the water side pump 11 can be adjusted.

  The cooling water circulation device 3 of the present embodiment also includes a cooling water side heat controller 33 that performs heating control of the cooling water side electric heater 14 based on a deviation between a measured value of the cooling water thermometer 12 and a set cooling water temperature. ing. The cooling water heat controller 33 may be the same as the set cooling water temperature of the cooling water side flow rate controller 34 based on the LLC temperature signal measured by the cooling water thermometer 12, or may be a set cooling water temperature slightly shifted as the heating side, Based on the deviation between the set cooling water temperature and the LLC measured temperature, the output signal causes the thyristor of the electric heater, and especially the solid state relay (SSR) from the viewpoint of controllability and contact life, to be the set cooling water temperature. Control power output.

  When performing a leak test that does not require temperature adjustment in the cooling water circulation device 3, the first cooling water control valve 19 and the second cooling water control valve 20 are fixed at an opening of 50%, and the first industry The irrigation control valve 18 is fully opened. Furthermore, if the cooling water side pump 11 is stopped immediately after the test, the temperature of the LLC will rise too much due to the preheating of the cooling water side electric heater 14, so that the cooling water side pump 11 is kept for a predetermined time (for example, 5 minutes) after the test. About) Residual operation.

  The oil circulation device 4 includes an oil-side pump 41 for circulating the ATF, an oil thermometer 42 that can measure the temperature of the ATF, an oil-side cooling mechanism 43 as an oil-side cooling means that can cool the ATF, An oil side electric heater 44 as oil side heating means capable of heating the oil and an oil side open type expansion tank 45 are provided.

  The oil-side cooling mechanism 43 includes an oil-side heat exchanger 47 that exchanges heat between the ATF that circulates in the oil circulation device 4 and industrial water, and industrial water that is supplied to the primary side of the oil-side heat exchanger 47. A second industrial water control valve 48 as a second industrial water flow control device for adjusting the flow rate, and a first oil flow control device for adjusting the flow rate of ATF supplied to the secondary side of the oil side heat exchanger 47. An oil control valve 49 and a second oil control valve 50 are provided.

  As described above, the oil circulation device 4 includes the oil-side electric heater 44, so that when the water-cooled transmission oil heat exchanger 2 is actually mounted on the vehicle, the ATF circulates the AT to increase the temperature. It is assumed that the assumed ATF temperature rise can be realized in the oil circulation device 4. In order to reproduce the situation such as when the vehicle is running during the test, the oil-side electric heater 44 needs a heating capability that can raise the temperature of the ATF to a temperature higher than the LLC. For this reason, when the cooling water side electric heater 14 and the oil side electric heater 44 are compared, a cooling water side electric heater 14 having a heating capability lower than that of the oil side electric heater 44 can be adopted. In the present embodiment, the cooling water side electric heater 14 is used whose maximum heating capacity is about 50% of the maximum heating capacity of the oil side electric heater 44.

  Further, since the oil circulation device 4 includes the oil-side cooling mechanism 43, the temperature of the ATF in the oil circulation device 4 can be adjusted in cooperation with the oil-side electric heater 44, and the temperature increase (speed) of the ATF. Can be imitated, the temperature of the ATF such as the initial state of the test can be set as appropriate, or the ATF temperature can be lowered relatively quickly after the test. Further, the ATF temperature rises when the oil-side pump 41 is driven. Accordingly, the oil-side cooling mechanism 43 adjusts the ATF heated by the oil-side electric heater 44 and the oil-side pump 41 (the oil-side electric heater 44 may not be operated depending on the test content and the temperature condition of the ATF). By cooling, it is possible to realize the ATF temperature condition assuming an actual vehicle. The second industrial water control valve 48, the first oil control valve 49, and the second oil control valve 50 are each constituted by a two-way valve. In particular, the first oil control valve 49 and the second oil control valve 50 are It is configured so that the flow rate can be controlled while switching the flow paths by operating in reverse.

  Further, the oil circulation device 4 includes an oil-side forward pipe 51 that supplies the ATF cooled by the oil-side heat exchanger 47 to the water-cooled transmission oil heat exchanger 2, and the water-cooled transmission oil heat exchanger 2. And an oil-side return pipe 52 that returns the discharged ATF to the oil-side heat exchanger 47 side. The oil side pump 41 is provided in an oil side forward pipe 51. The oil thermometer 42 is provided in a portion of the oil-side forward pipe 51 between the oil-side pump 41 and the water-cooled transmission oil heat exchanger 2. The oil side electric heater 44 is provided in the oil side return pipe 52.

  Further, in the oil-side forward pipe 51, a portion between the oil-side pump 41 and the oil-side heat exchanger 47, and in the oil-side return pipe 52, the oil-side electric heater 44 and the oil-side heat exchanger 47 are An oil-side first bypass passage 53 is provided to connect the portion between the two. The first oil control valve 49 is provided in the oil-side first bypass passage 53, and the second oil control valve 50 is connected to the oil-side first bypass passage 53 and the oil-side heat exchange in the oil-side forward pipe 51. It is provided at a position between the container 47.

  Furthermore, an oil side expansion pipe 54 that connects a portion between the oil side pump 41 and the oil side first bypass passage 53 of the oil side forward pipe 51 and the oil side open expansion tank 45 is provided. Yes. When the ball valve 54a provided in the oil side expansion pipe 54 is opened, the oil side expansion pipe 54 is opened, and the expansion of the ATF is absorbed by the oil side open type expansion tank 45, or before or after the test. Then, ATF is filled in a circulation path such as the oil-side forward pipe 51 through the oil-side open expansion tank 45.

  In addition, the oil circulation device 4 includes a portion of the oil-side forward pipe 51 between the oil-side pump 41 (oil thermometer 42) and the water-cooled transmission oil heat exchanger 2, and an oil-side return pipe. 52, an oil-side second bypass passage 55 that connects a portion between the oil-side electric heater 44 and the water-cooled transmission oil heat exchanger 2 is provided. A manual oil-side flow rate adjustment valve 56 is provided in each of the oil-side second bypass passage 55 and the oil-side return pipe 52 in the vicinity of the oil-side second bypass passage 55.

  In the oil-side forward pipe 51, the portion on the water-cooled transmission oil heat exchanger 2 side of the oil-side pump 41 has a high-pressure specification that can withstand higher oil pressure. Further, an oil flow meter 57 for measuring the flow rate of ATF is provided between the oil-side return pipe 52 and the oil-side second bypass passage 55 and the water-cooled transmission oil heat exchanger 2. An oil-side air vent pipe 58 is provided. In addition, the oil circulation device 4 is provided with pressure gauges at a plurality of locations. In the present embodiment, the ATF flow rate adjustment and pressure adjustment are performed by adjusting the oil-side pump 41 and the oil-side flow rate adjustment valve 56.

  The primary side of the oil-side heat exchanger 47 is discharged from the second upstream-side working water pipe 61 that supplies industrial water from the industrial water supply to the oil-side heat exchanger 47 and the oil-side heat exchanger 47. Further, a second reflux side work water pipe 62 for returning the industrial water to the industrial water supply is connected, and the second industrial water control valve 48 is provided in the second return side work water pipe 62.

  In this embodiment, as shown in FIG. 2, the operation control of the second industrial water control valve 48, the first oil control valve 49, the second oil control valve 50, and the oil-side electric heater 44 is performed depending on the situation. Done. More specifically, when the measured temperature of the ATF measured by the oil thermometer 42 is lower than the operation switching set temperature (90 ° C. in this example) input as a set value to the oil side flow rate controller 64 (FIG. In the case of the first temperature control 2), the first oil control is performed so that the ATF discharged from the secondary side of the water-cooled transmission oil heat exchanger 2 flows into the oil-side heat exchanger 47 with a maximum amount. The measurement signal of the oil thermometer 42 is processed to output a steady value so that the valve 49 is fully closed and the second oil control valve 50 is fully opened, and the opening degree of the second industrial water control valve 48 is mainly used. Is proportionally controlled by an output signal that is output by calculating a deviation from the test oil set temperature value that is input to the oil-side flow rate controller 64 based on the measurement signal of the oil thermometer 42, Warm Adjustment is to be carried out.

  On the other hand, when the ATF temperature measured by the oil thermometer 42 is 90 ° C. or higher (in the case of the second temperature control in FIG. 2), first, the oil-side flow rate controller 64 controls the operation switching set temperature and the measured oil. The temperature is compared and calculated, and the second temperature control is displayed. Thereafter, the ATF discharged from the secondary side of the water-cooled transmission oil heat exchanger 2 mainly opens the first oil control valve 49 and the second oil control valve 50 so as to operate in reverse. The degree is proportionally controlled by an output signal that is output by calculating a deviation from a test oil set temperature value that is input to the oil-side flow rate controller 64 based on a measurement signal of the oil thermometer 42 every time a test is performed. And the measurement signal of the oil thermometer 42 is arithmetically processed and a steady value is output so that the opening degree of the second industrial water control valve 48 is fully opened, and the temperature adjustment of the ATF is performed. .

  In the present embodiment, the input device for switching whether the ATF temperature is adjusted by the second industrial water control valve 48 or the first oil control valve 49 and the second oil control valve 50 (not shown). ), And the switching is performed by the operator operating the input device. In addition, the temperature of the ATF is displayed on the screen of a touch panel (not shown) provided in the water-cooled transmission oil heat exchanger test system 1, and the output of the oil side pump 41 can be adjusted by the operation on the touch panel. It has become.

  The oil circulation device 4 of the present embodiment also includes an oil-side heat controller 63 that performs heating control of the oil-side electric heater 44 based on the deviation between the measured value of the oil thermometer 42 and the set oil temperature. The oil-side heat controller 63 may be the same as the set oil temperature of the oil-side flow rate controller 64 based on the ATF temperature signal measured by the oil thermometer 42, or may be set to a set oil temperature that is slightly shifted on the heating side. Based on the deviation between the temperature and the measured ATF temperature, the output signal causes the thyristor of the electric heater, and especially the power of the solid state relay (SSR) in terms of controllability and contact life, to reach the set oil temperature. Control the output.

  When performing a leak test that does not require temperature adjustment in the oil circulation device 4, the first oil control valve 49 and the second oil control valve 50 are fixed at an opening of 50%, and the second industrial water control is performed. The valve 48 is opened fully. Furthermore, if the oil-side pump 41 is stopped immediately after the test, the ATF temperature will rise excessively due to the preheating of the oil-side electric heater 44, so that the oil-side pump 41 remains for a predetermined time (for example, about 5 minutes) after the test. It is supposed to drive.

  As described above in detail, in the present embodiment, the water cooling type oil heat exchanger test system 1 that can create the LLC test conditions in the cooling water circulation device 3 and the ATF test conditions in the oil circulation device 4 is used. The single test of the water-cooled transmission oil heat exchanger 2 can be performed. For this reason, there is no need to prepare an engine, an AT, an installation for installing the engine or AT (engine bench, etc.), an exhaust gas exhausting facility, gasoline for driving the engine, etc. The performance test of the water-cooled transmission oil heat exchanger 2 can be performed simply. Therefore, the labor and cost required for the performance test of the water-cooled transmission oil heat exchanger 2 can be suppressed, and the opportunity for the performance test of the water-cooled transmission oil heat exchanger 2 is refrained from concerns about labor and cost. , It is possible to suppress the situation where development does not proceed smoothly. Compared to the actual adjustment of the ATF temperature and flow rate to the desired test conditions by moving the engine, etc., such adjustment can be performed relatively quickly and accurately, and the test efficiency and test accuracy can be improved. Improvements can be made.

  In the present embodiment, both the industrial water side, which is the primary side of the cooling water side heat exchanger 17 (oil side heat exchanger 47), and the LLC side (ATF side), which is the secondary side, have LLC ( It is configured to be able to adjust how much ATF) is cooled by industrial water, and in other words, adjust the temperature of LLC (ATF). For this reason, when the temperature of LLC or ATF is 90 ° C. or higher, the temperature is adjusted by the first cooling water control valve 19 and the second cooling water control valve 20, the first oil control valve 49 and the second oil control valve 50. (The flow rate of LLC and ATF flowing into the cooling water side heat exchanger 17 and the oil side heat exchanger 47 is adjusted), and the first industrial water control valve 18 and the second industrial water control valve 48 are fully opened. Thus, industrial water is allowed to flow into the cooling water side heat exchanger 17 and the oil side heat exchanger 47 to the maximum extent. As a result, the flow rate of industrial water in the cooling water side heat exchanger 17 and the oil side heat exchanger 47 is increased (the flow velocity is increased). In the cooling water side heat exchanger 17 and the oil side heat exchanger 47, the industrial water flow is increased. However, it is possible to avoid a situation in which boiling occurs due to heat exchange with LLC or ATF.

  On the other hand, when the temperature of LLC or ATF is less than 90 ° C., the temperature of LLC or ATF is adjusted by adjusting the flow rate of industrial water flowing into the cooling water side heat exchanger 17 or the oil side heat exchanger 47. We will make adjustments. In this case, a cooling tower for exchanging heat with the atmosphere, a cooling device for industrial water that uses a refrigerator depending on the temperature, and a circulating transfer means for industrial water with the cooling water side cooling means and the oil side cooling means of this device. The flow rate of an industrial water pump, that is, the pump power can be reduced, and the flow rate can be reduced to increase the temperature difference of industrial water at the inlet and outlet. In the case of cooling by a machine, the temperature of the condenser can be increased and the energy required for cooling can be reduced. Therefore, energy saving can be achieved.

  In addition, the cooling water side electric heater 14 is used whose maximum heating capacity is about half of the maximum heating capacity of the oil side electric heater 44. For this reason, it is possible to reliably and smoothly cope with various test conditions such as when starting the engine while reducing the size and cost of the cooling water side electric heater 14.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the above embodiment, the first industrial water control valve 18 (second industrial water control valve 48), or the first cooling water control valve 19 and the second cooling water control valve are used for temperature adjustment of LLC (ATF). 20 (the first oil control valve 49 and the second oil control valve 50) is configured to be manually switched by the operator. The switching is performed by the cooling water thermometer 12 (oil thermometer 42). ) May be automatically performed based on the measured value. In this case, the operation by the operator can be simplified, and a situation in which a measure corresponding to a temperature change over 90 ° C. of LLC or ATF is not performed, and a response to a temperature change of LLC or ATF can be avoided. Can be dealt with quickly and accurately.

  (B) In the above embodiment, the cooling water side heat exchanger 17 and the oil side heat exchanger 47 cool the LLC and ATF using industrial water, but are particularly limited to such a configuration. Instead, for example, a cooling tower or a refrigerator may be provided, and the LLC or ATF may be cooled by the refrigerant cooled to these.

  Although not specifically mentioned in the above embodiment, the cooling water side electric heater 14 and the oil side electric heater 44 have a function of not only switching on and off, but also maintaining a predetermined heat generation amount that is appropriately set. It may be. Furthermore, in the above embodiment, the cooling water side electric heater 14 has a maximum heating capacity of about 50% of the maximum heating capacity of the oil side electric heater 44, but is particularly limited to such a configuration. For example, the cooling water side electric heater 14 and the oil side electric heater 44 may be the same. However, since the maximum heating capacity of the cooling water side electric heater 14 is sufficient if it is 30% to 60% of the maximum heating capacity of the oil side electric heater 44, the cooling water can be used for cost reduction. As the side electric heater 14, it is preferable to employ one having a lower maximum heating capacity than the oil side electric heater 44, particularly one having a minimum required maximum heating capacity.

  (C) In the above embodiment, in order to adjust the flow rate of the LLC (ATF) flowing through the cooling water side heat exchanger 17 (oil side heat exchanger 47) (and hence temperature adjustment), a cooling water flow rate adjustment device (oil As the flow rate adjusting device), two two-way valves, the first cooling water control valve 19 and the second cooling water control valve 20 (first oil control valve 49 and second oil control valve 50) are used. Instead of this, the flow rate of the LLC (ATF) may be adjusted by providing one three-way valve at the branch point of the cooling water side first bypass passage 23 (oil side first bypass passage 53).

  (D) In the above embodiment, the first cooling water control valve 19 and the second cooling water control valve 20 (first oil control valve 49 and second oil control valve 50) and the first industrial water control valve 18 (second Either the industrial water control valve 48) is configured to be able to adjust the degree of cooling in the cooling water side heat exchanger 17 (oil side heat exchanger 47), but either one is provided. That's fine. However, it is desirable to provide at least the first cooling water control valve 19 and the second cooling water control valve 20 (first oil control valve 49 and second oil control valve 50) in order to avoid boiling of industrial water.

  (E) In the above embodiment, the water-cooled transmission oil heat exchanger test system 1 for testing the water-cooled transmission oil heat exchanger 2 for cooling the AT ATF is embodied. It can also be applied to a water-cooled transmission oil heat exchanger test system for testing a water-cooled transmission oil heat exchanger for cooling the CVT fluid of a step transmission (CVT). That is, instead of the water-cooled transmission oil heat exchanger 2 of the above embodiment, a water-cooled transmission oil heat exchanger for cooling the CVT fluid is installed and the initial connection is made, so that the water-cooled transmission It is also possible to test the machine oil heat exchanger.

  DESCRIPTION OF SYMBOLS 1 ... Water-cooled transmission oil heat exchanger test system 1, 2 ... Water-cooled transmission oil heat exchanger, 3 ... Cooling water circulation device, 4 ... Oil circulation device, 11 ... Cooling water side pump, 12 ... Cooling water thermometer , 13 ... Cooling water side cooling mechanism, 14 ... Cooling water side electric heater, 17 ... Cooling water side heat exchanger, 18 ... First industrial water control valve, 19 ... First cooling water control valve, 20 ... Second cooling water Control valve 33 ... Cooling water side heat controller 34 ... Cooling water side flow controller 41 ... Oil side pump 42 ... Oil thermometer 43 ... Oil side cooling mechanism 44 ... Oil side electric heater 47 ... Oil side heat Exchanger, 48 ... second industrial water control valve, 49 ... first oil control valve, 50 ... second oil control valve.

Claims (5)

A water-cooled transmission oil heat exchanger capable of cooling transmission oil used in a transmission that forms part of a drive system that transmits the shaft rotational force of the prime mover to the vehicle driving force to the ground;
A cooling water circulation device attached to a test chamber capable of circulating and supplying cooling water to a primary side of the water-cooled transmission oil heat exchanger;
An oil circulation device attached to a test chamber capable of circulating and supplying transmission oil to the secondary side of the water-cooled transmission oil heat exchanger,
In the water-cooled transmission oil heat exchanger test system for performing the performance test of the water-cooled transmission oil heat exchanger,
The cooling water circulation device is
A cooling water side pump for circulating the cooling water;
A cooling water thermometer capable of measuring the temperature of the cooling water;
A cooling water side cooling means capable of cooling the cooling water;
A cooling water side heating means capable of heating the cooling water,
The oil circulation device is
An oil-side pump for circulating transmission oil;
An oil thermometer capable of measuring the temperature of transmission oil,
Oil-side cooling means capable of cooling transmission oil;
A water-cooled transmission oil heat exchanger test system comprising an oil side heating means capable of heating transmission oil. The cooling water circulation device is
The cooling water side pump, the cooling water thermometer, the cooling water side cooling means, the cooling water side heating means, and the cooling water side heat exchanger, a water-cooled transmission oil heat exchange as a specimen Through the connection coupling with the cooling water side of the vessel, respectively, in the middle of the pipe to be connected,
The cooling water side heat exchanger is a heat exchanger that exchanges heat between cooling water circulating through the cooling water circulation device and industrial water cooled by a building-side cooling heat source,
The cooling water circulation device further includes a high-temperature sealed expansion tank in the case of high-temperature cooling water, which is different from the cooling water circulation expansion system at low temperatures, in order to adjust the internal pressure of the pipe that is a closed system,
2. The water-cooled transmission oil heat exchanger test system according to claim 1, wherein in the case of high-temperature cooling water, high-temperature water at 100 ° C. or higher can be circulated by switching to the high-temperature closed expansion tank. . The cooling water side cooling means is
A first industrial water flow rate adjusting device for adjusting the flow rate of industrial water supplied to the primary side of the cooling water side heat exchanger;
A cooling water flow rate adjusting device for adjusting the flow rate of cooling water supplied to the secondary side of the cooling water side heat exchanger;
The oil-side cooling means is
An oil-side heat exchanger for exchanging heat between transmission oil circulating through the oil circulation device and industrial water;
A second industrial water flow rate adjusting device for adjusting the flow rate of industrial water supplied to the primary side of the oil side heat exchanger;
The water-cooled transmission oil heat exchanger according to claim 2, further comprising an oil flow rate adjusting device for adjusting a flow rate of transmission oil supplied to a secondary side of the oil side heat exchanger. Test system. The cooling water circulation device is
Equipped with a cooling water flow controller
In the cooling water side flow controller,
Calculate and output the operation amount for the first industrial water flow control device, and calculate and output the operation amount for the cooling water flow control device,
A determination signal that receives the measured value of the cooling water thermometer, compares the operation selection set temperature set in the cooling side flow rate controller with the measured value of the cooling water thermometer, and uses the operation selection set temperature as a threshold value And
Based on the determination signal, one of the first industrial water flow rate control device or the cooling water flow rate control device is operated based on the deviation between the measured value input signal and the cooling water temperature setting temperature set for testing. The flow rate adjusting device is proportionally controlled by the output signal, and on the other hand, the valve opening degree of the flow rate adjusting device is quantitatively adjusted to flow the entire amount to the cooling water side heat exchanger,
The oil circulation device is
With oil side flow controller,
In the oil side flow rate controller,
Calculate and output the operation amount for the second industrial water flow control device, and calculate and output the operation amount for the oil flow control device,
The measurement value of the oil thermometer is input, and the operation selection set temperature set in the oil side flow controller is compared with the measurement value of the oil thermometer, and a judgment signal is output with the operation selection set temperature as a threshold value. ,
Based on the determination signal, one of the second industrial water flow control device or the oil flow control device has an output calculated based on the deviation between the measured value input signal and the oil temperature setting temperature set for testing. Based on the signal, the flow rate adjusting device is proportionally controlled, and on the other side, the valve opening degree of the flow rate adjusting device is quantitatively adjusted to flow the entire amount to the oil side heat exchanger,
The cooling water side flow controller and the oil side flow controller are each set with an operation selection set temperature for preventing cavitation due to boiling of the cooling water in the industrial water pipe,
When the temperature of the cooling water measured by the cooling water thermometer is lower than the operation selection set temperature, the cooling water-side flow rate controller has a maximum amount of cooling water discharged from the water-cooled transmission oil heat exchanger. By adjusting the cooling water flow rate adjusting device to a fixed position so as to flow into the cooling water side heat exchanger in a limited amount, and by proportionally adjusting the industrial water flow rate by the first industrial water flow rate adjusting device, The cooling water temperature is adjusted,
When the temperature of the cooling water measured by the cooling water thermometer is equal to or higher than the operation selection set temperature, the cooling water side flow rate controller flows the industrial water into the cooling water side heat exchanger with a maximum amount. The temperature of the cooling water is adjusted by adjusting the flow rate of the cooling water to the cooling water side heat exchanger by the cooling water flow rate adjusting device proportionally and adjusting the first industrial water flow rate adjusting device to a fixed position. Adjustments are made,
When the temperature of the transmission oil measured by the oil thermometer is lower than the operation selection set temperature, the oil-side flow rate controller causes the transmission oil to flow into the oil-side heat exchanger with a maximum amount. As described above, adjusting the oil flow rate adjusting device to a fixed position, and adjusting the flow rate of industrial water by the second industrial water flow rate adjusting device in proportion control, the temperature adjustment of the transmission oil is performed,
When the temperature of the transmission oil measured by the oil thermometer is equal to or higher than the operation selection set temperature, the oil-side flow rate controller controls the industrial water to flow into the oil-side heat exchanger with a maximum amount. The temperature of the transmission oil can be adjusted by adjusting the second industrial water flow adjustment device to a fixed position and proportionally adjusting the flow rate of the transmission oil to the oil-side heat exchanger by the oil flow adjustment device. The water-cooled transmission oil heat exchanger test system according to claim 3, wherein the test system is performed. The cooling water side heating means and the oil side heating means are each constituted by an electric heater,
5. The water-cooled transmission oil according to claim 1, wherein a maximum heating capacity of the cooling water side heating unit is 30% to 60% of a maximum heating capacity of the oil side heating unit. Heat exchanger test system.

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