JP2002039339A - Temperature regulating means for transmission fluid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature regulating means for a transmission fluid being small and capable of coping with both heating and cooling. SOLUTION: In a drive 10 for a vehicle having an automatic transmission 18, a bypass line 42 is provided in a hydraulic line 37 and a heat storage tank 44 is provided on the bypass line 42. A latent heat material for accumulating heat used in regulating the temperature of the transmission fluid (ATF) is housed in the heat storage tank 44. Thus, if heating or cooling of the ATF by a radiator 32 is precluded or insufficient, as when the temperature of cooling water circulating in a radiator 32 is low immediately after the start of an internal combustion engine 12 or when the temperature of the ATF is higher than it is during normal operation because the vehicle climbs a hill or gets caught in a traffic jam, then the ATF is introduced into the heat storage tank 44 from the bypass line 42 to heat or cool the ATF.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a means for adjusting the temperature of a transmission fluid used in a transmission of a vehicle drive device, and more particularly to a warm-up, cooling or heat storage operation according to the state of a vehicle. It relates to a temperature adjusting means.

[0002]

2. Description of the Related Art Many vehicle driving devices include a transmission that converts the rotation speed of a prime mover into an appropriate rotation speed and makes the rotation speed suitable for driving a vehicle. The transmission includes a power transmission mechanism such as a gear, and a fluid for performing lubrication enters the transmission. This lubricating fluid is
Since the viscosity increases when the temperature is low in winter or the like, the resistance of the moving part in the transmission increases, and the friction loss of the vehicle drive device increases. Therefore, the transmission efficiency of the drive device can be improved by warming up the transmission early.

As one of the transmissions, there is known an automatic transmission in which a torque converter and a gear transmission are combined. In this automatic transmission, a working fluid for transmitting power in the torque converter, a working fluid for controlling the operation of a clutch or a brake for selecting a gear position in a gear transmission, and a fluid for lubrication are shared. Have been. Responsiveness of the operation of the clutch, the brake, etc.,
The characteristics of the friction material and the like used in these materials have a problem that predetermined characteristics cannot be obtained when the fluid is at a low temperature.

[0004] As described above, it is desirable in terms of efficiency to warm up the transmission early. In particular, in automatic transmissions,
Working fluid for torque converter, working fluid for clutch, etc.
A lubricating fluid is commonly used, and it has been desired to quickly warm this large amount of fluid to a normal temperature.

As an example of adjusting the temperature of the working fluid of such an automatic transmission, for example, Japanese Patent Laid-Open Publication No. Hei 8-246873 discloses a method of storing the warmed cooling water during the previous operation of an internal combustion engine. A device for warming a working fluid with the cooling water at the time of starting is disclosed.

However, in the above-mentioned conventional temperature adjusting means, since the cooling water for the internal combustion engine is stored in advance, a large amount of cooling water is required to perform sufficient temperature adjustment. However, there has been a problem that the apparatus is increased in size and cost is increased.

Further, in the case of the working fluid for the automatic transmission, the temperature of the working fluid becomes high particularly when climbing up a slope or congestion in summer, and therefore, there is a problem that the working fluid may exceed the upper limit temperature. Was. For this reason, not only a device for heating the working fluid but also a device for cooling it is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a transmission fluid temperature adjusting means which is compact and can cope with both heating and cooling.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a means for adjusting the temperature of a transmission fluid used in a transmission of a vehicle drive system, wherein the temperature of the transmission fluid is adjusted in a fluid passage. A heat storage means having a latent heat material for storing heat used for adjusting the temperature of the machine fluid is provided, wherein the latent heat material is made of two or more materials having different melting points.

Further, there is provided means for adjusting the temperature of the transmission fluid used in the transmission of the vehicle drive device, the latent heat for storing heat used for adjusting the temperature of the transmission fluid in the fluid passage. A heat storage means having a material is provided, and the heat storage means is switched to a warmer or a cooler.

[0010] Further, there is provided a means for adjusting the temperature of a transmission fluid used in a transmission of a vehicle drive device, the chemical means for storing heat used for adjusting the temperature of the transmission fluid in a fluid passage. When a heat storage means having a reaction heat storage material is provided and the transmission fluid is circulated through the heat storage means, the circulation start timing is determined in consideration of the chemical reaction time of the chemical reaction heat storage material.

[0011] Further, there is provided means for adjusting the temperature of a transmission fluid used in a transmission of a vehicle drive device, wherein the means for storing heat used for adjusting the temperature of the transmission fluid in a fluid passage. A heat storage means having a reaction heat storage material is provided, and the heat storage means is switched to a warmer or a cooler.

[0012]

Embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of a vehicle drive device 10 according to the present embodiment. The vehicle drive device 10 includes a liquid-cooled internal combustion engine 12 and a rotating electric machine 1 as prime movers.
And 4. The power shaft of the internal combustion engine 12 and the rotating electric machine 14 can be connected and disconnected by a clutch 16. The rotating electric machine 14 is supplied with electric power from a battery (not shown) such as when the output required by the driver is low, that is, when the operation amount of the accelerator is small, or when the internal combustion engine is running at low speed with low efficiency, and functions as an electric motor. And drive the vehicle. Further, the rotating electric machine 14 is driven by the inertia of the vehicle or the internal combustion engine 12 when the vehicle is braked or when the charged amount of the battery is reduced, functions as a generator, and charges the battery. The clutch 16 is disengaged when the vehicle is driven only by the rotating electric machine 14, for example, and the internal combustion engine 1
2. Suppress the occurrence of pump loss and friction loss.

The output of the internal combustion engine 12 or the rotating electric machine 14 is sent to an automatic transmission 18. The automatic transmission 18 includes a fluid transmission mechanism, a transmission mechanism, and a control mechanism. In the present embodiment, the fluid transmission mechanism is the torque converter 20,
Preferably, it has a direct connection function. The transmission mechanism is a gear transmission unit 22 including a plurality of planetary gear mechanisms, and the gear transmission unit 22 also includes a clutch and a brake that restrict movement of each element of each planetary gear mechanism. These clutches and brakes are controlled by selectively supplying working fluid from a fluid pressure control unit 24 as a control mechanism. The output of the gear transmission unit 22 is transmitted by the propulsion shaft 26 toward the drive wheels. The aforementioned torque converter 2
The direct coupling function of 0 is achieved by providing a direct coupling clutch that mechanically couples the input and output of the torque converter without using a fluid.

An auxiliary rotating electric machine 30 is further connected to a power shaft of the internal combustion engine 12 via a transmission mechanism 28. The transmission mechanism 28 can be an endless flexible member such as a belt or a chain, or a gear train. Auxiliary machine 30
Functions as a generator when the internal combustion engine 12 is operating, charges an auxiliary battery (not shown) that supplies electric power to the internal components of the internal combustion engine and electric components of the vehicle, and directly supplies electric power to the electric components and the like. Supply. In addition, the auxiliary rotating electric machine 30 includes the internal combustion engine 1.
At the time of the start of 2, the electric power is received from the auxiliary battery and functions as an electric motor.

The coolant of the internal combustion engine 12 is formed by the internal combustion engine 12, the radiator 32, and the coolant pipe 34 connecting these, and flows through the cooling circuit. The heat generated in the internal combustion engine 12 is carried to the radiator 32 by the cooling liquid, and is radiated therefrom to the atmosphere.

In the automatic transmission 18, the transmission 1
A common fluid is used for the entire lubricating fluid, the working fluid that mediates the power transmission of the torque converter 20, and the working fluid that operates the clutch and brake in the gear transmission unit 22. Hereinafter, this transmission fluid is referred to as ATF (Auto
matic Transmission Fluid). The ATF is supplied to each unit of the automatic transmission 18 via the fluid pressure control unit 24 by a hydraulic pump 36 built in the gear transmission unit 22. Further, a part of the ATF is sent to the radiator 32 by the hydraulic piping 38, where heat exchange is performed with the coolant, and returns to the inside of the oil pan of the automatic transmission 18 again. This circuit is hereinafter referred to as a main circuit. Coolant is almost 90
C., and when the ATF is heated, the ATF is cooled in the radiator 32. The internal combustion engine 12
Is warmed up first, the radiator 3
Heating of the ATF takes place in 2.

The hydraulic pump 36 is connected to the torque converter 20
, The internal combustion engine 12 or the rotating electric machine 14
It is driven by. Therefore, the vehicle drive device 1
0 is stopped, or when the vehicle is running only with the rotating electric machine 14 and the vehicle is at a very low speed or stopped,
In some cases, the discharge amount of the hydraulic pump 36 cannot be sufficiently secured. For such a case, the vehicle drive device 10 includes an electric auxiliary pump 40. The operation of the auxiliary pump 40 is controlled by a control unit described later according to the running state of the vehicle.

A bypass pipe 42 is provided in the middle of the hydraulic pipe 38 so as to bypass the radiator 32, and a heat storage tank 44 is provided in the bypass pipe 42.
The heat storage tank 44 has a latent heat material described later, and corresponds to a heat storage unit according to the present invention. Also, the bypass pipe 42
The circuit of the ATF including the heat storage tank 44 and the heat storage tank 44 will be hereinafter referred to as a bypass circuit. Switching between the main circuit of the ATF and the bypass circuit is performed by switching valves 48 and 50. Also,
The heat storage tank 44 is provided with a heat storage tank bypass pipe 72 via switching valves 68 and 70.

In the case of the heat storage tank 44 using a latent heat material as described above, there is no need to store cooling water, and the size of the apparatus can be reduced.

FIG. 2 is a structural view of the heat storage tank 44. In FIG. 2, the heat storage tank 44 includes a heat insulating material 74.
And a latent heat material 76 is accommodated therein. A heat exchange pipe 78 is formed in the latent heat material 76. ATF is supplied from the bypass pipe 42 to the inlet 80.
Flows through the heat exchange pipe 78 through the heat exchange pipe 78, and after having exchanged heat with the latent heat material 76, exits from the outlet 82 to the bypass pipe 42.
As the latent heat material 76, for example, a hydrocarbon, an inclusion compound, an inorganic salt hydrate, an inorganic salt eutectic, or the like is used.

As described above, during normal operation,
The ATF is cooled or heated by the radiator 32. However, such as immediately after the start of the internal combustion engine 12, the radiator 3
When the temperature of the cooling water circulating in the water 2 is low,
If the temperature of the ATF becomes higher than that during normal operation, such as during a traffic jam, the heating and cooling of the ATF by the radiator 32 becomes impossible or insufficient. In such a case, the AT
F is introduced into the heat storage tank 44 from the bypass pipe 42, and heating and cooling by the heat storage tank 44 are required. Therefore,
For example, when the temperature of the ATF is low, such as in winter, the heat storage tank 44 is used as a warmer for heating the ATF. When the temperature of the ATF is high, such as in summer,
Used as a cooler for cooling.

When the heat storage tank 44 is used as a warmer, when the temperature of the ATF is high during normal operation or the like, the A
The TF is passed through the heat storage tank 44 to store heat in the latent heat material 76. Then, at the time of the first departure of the next vehicle, ATF
When the ATF needs to be heated, the ATF is stored in the heat storage tank 44.
And heats it with the heat stored in the latent heat material 76. The inlet 80 and the outlet 82 of the heat storage tank 44 are closed while the heat is stored in the latent heat material 76 as described above, that is, while the internal combustion engine 12 is stopped and the vehicle is stopped for a long time. Is preferred. This is because it becomes difficult for the heat stored in the latent heat material 76 to escape.

When the heat storage tank 44 is used as a cooler, the ATF is passed through the heat storage tank 44 when the temperature of the ATF is low, or the latent heat
The temperature of 6 is lowered. Thereafter, when it is necessary to cool the ATF, the ATF is passed through the heat storage tank 44 and cooled by the cold stored in the latent heat material 76.

In the above-described heat storage tank 44, the latent heat material 76 is preferably made of two or more materials having different melting points. For example, if one of the melting points is 90 ° C.
When two types of latent heat materials having a temperature of 0 ° C. are used, the latent heat material having a melting point of 90 ° C. is usually melted to store heat, and this solidifies to heat the ATF. However, if the temperature of the ATF rises abnormally, the ATF can be cooled by melting the latent heat material having a melting point of 120 ° C. In this case, heating and cooling can be appropriately performed according to the temperature of the ATF without requiring a special control mechanism.

FIGS. 3A and 3B show an ATF which passes through the heat storage tank 44 according to the ATF temperature in the transmission 18.
An example of the flow rate is shown. In FIG. 3A, the transmission 18
When the temperature of the ATF is high, the heat storage tank 44 is used as a cooler, and the ATF is inversely proportional to the change of the ATF temperature.
The flow rate is controlled. When the ATF temperature is low, the heat storage tank 44 is used as a warmer, and the ATF flow rate is controlled in proportion to a change in the ATF temperature. AT
The control of the F flow rate is performed, for example, by switching valves 48, 50, 68,
The opening and closing of 70 or the like is adjusted.

FIG. 3B shows an example in which the flow rate of the ATF is changed according to the temperature of the latent heat material 76 in the heat storage tank 44 even at the same ATF temperature.

As described above, the ATF temperature can be controlled within a predetermined range. As shown in FIGS. 1 and 2, switching valves 68 and 70 are provided in the heat storage tank 44.
Is connected to the heat storage tank bypass pipe 72. Accordingly, when it is not necessary to pass the ATF through the heat storage tank 44 for controlling the ATF temperature and the temperature of the radiator 32 is not appropriate and the ATF cannot be passed,
The TF can be circulated between the gear transmission unit 22 and the fluid pressure control unit 24.

FIG. 4 shows an ATF flowing in the heat storage tank 44.
An example of a flow control method is shown. In this example, a large amount of ATF flows into the heat storage tank 44 immediately after the vehicle starts, particularly after a long-term stop, so that the ATF temperature reaches a predetermined range early. In FIG. 4, when the ignition switch (IG) is turned on and the internal combustion engine 12 is started, the heat storage tank 4 is operated by the hydraulic pump 36 shown in FIG.
At 4, the ATF circulation is started. At this time, the auxiliary pump 4
0 is also started, and the hydraulic pump 36 and the auxiliary pump 4 are driven until a predetermined time elapses after the flow rate of the hydraulic pump 36 reaches a predetermined value.
0 is used in combination. Thus, the flow rate of the ATF passing through the heat storage tank 44 can be increased, and the ATF temperature can reach the predetermined range early.

Returning to FIG. 1, the running state of the vehicle, including the operating state of the vehicle drive unit 10, is detected by the output signals of various sensors provided in each part of the vehicle and the calculation of the control unit 52. The traveling speed of the vehicle is calculated by the control unit 52 based on an output signal of a vehicle speed sensor 54 provided on the propulsion shaft 26, wheels, and the like. The temperature of the ATF representing the temperature inside the automatic transmission 18 is calculated by the control unit 52 based on the output signal of the transmission temperature sensor 56 provided in the fluid pressure control unit 24. The temperature of the ATF in the heat storage tank 44 is calculated by the control unit 52 based on the output signal of the tank temperature sensor 58 provided here.

An output signal from a shift position sensor 60 for detecting a control range and a control mode of the automatic transmission 18 selected by a shift lever or the like is also input to the control unit 52. The control range of the automatic transmission 18 includes, for example, a D position where an appropriate gear is automatically selected from each forward gear, a 2 position where an appropriate gear is selected from limited gears, and an L position. is there. Further, an N position where the gear transmission unit 22 is in a neutral state where power is not transmitted, an R position where reverse is selected, and a gear transmission unit 22
There is a P position to mechanically lock the output side of the vehicle and keep the vehicle from moving. Further, the present device is provided with a manual shift mode in which a driver can select a shift speed. In this mode, for example, when the driver operates a shift-up switch and a shift-down switch provided on the steering wheel, the shift speed is shifted to a higher side and a lower side, respectively.
The shift operation is performed by changing the steps.

An outside air temperature sensor 62 for measuring the temperature of the environment where the vehicle is placed, that is, the outside air temperature, is provided at a predetermined portion of the vehicle. The control unit 52 calculates the outside air temperature based on the output signal of the outside air temperature sensor 62.

The temperature in the automatic transmission 18 at the time when a predetermined time has elapsed after the driving of the vehicle drive device 10 has been stopped is stored in the storage unit 64. This stored temperature is used for estimating the temperature at the next start. Further, a signal from an ignition switch 66 for controlling start and stop of the vehicle drive device 10 is input to the control unit 52.

As described above, the start and stop of the auxiliary pump 40 and the opening and closing of the switching valves 48, 50, 68 and 70 are controlled by the control unit 52 based on the information received by the control unit 52. The operation of the mechanical fluid temperature adjusting means is performed. The radiator 32, the hydraulic pipe 38, the bypass pipe 42, and the heat storage tank 4 shown in FIGS.
4, switching valves 48, 50, 68, 70, heat storage tank bypass pipe 72, control unit 52, various sensors 54, 5
6, 58, 60, 62, 66, the storage unit 64 and the like constitute a transmission fluid temperature adjusting means according to the present invention.

FIG. 5 is a flowchart showing the operation of the transmission fluid temperature adjusting means according to the present invention shown in FIG. In FIG. 5, first, it is confirmed whether or not the system is normal (S1). Here, the system is a means for adjusting the temperature of the transmission fluid, and it is checked whether or not each of the above-mentioned components is normal. If there is an abnormality in the system, the following control is not performed.

If the system is normal, it is next determined whether the season is summer or winter (S2, S3). This determination is made by the control unit 52 based on the temperature information or the absolute time received by the control unit 52 from the outside air temperature sensor 62.

When the season is summer (S2), the heat storage tank 44 is used as a cooler for the ATF (S4).

In this case, the control unit 52 calculates the ATF flow rate flowing into the heat storage tank 44 based on the outside air temperature, the ATF temperature in the automatic transmission 18 and the ATF temperature in the heat storage tank 44, and the like. The ATF flow rate is calculated, for example, as shown in FIG.
5). Based on the ATF flow rate thus calculated,
The control unit 52 controls the opening and closing of the switching valves 48, 50, 68, 70, etc., switches the ATF circulation path to the bypass circuit, that is, the heat storage tank 44 side, and performs flow control (S
6).

When the control unit 52 determines that it is necessary to increase the circulating flow rate of the ATF to the heat storage tank 44, for example, when the vehicle starts running for the first time after a long-term stop, the control unit 52
Starts the auxiliary pump 40 and performs control as shown in FIG. 4 (S7).

Next, when the season is winter (S3), the heat storage tank 44 is used as an ATF warmer (S3).
8). Thereafter, the ATF flow rate is calculated (S9), the ATF circulation path is switched (S10), and the auxiliary pump is started (S1).
In 1), the same control as (S5), (S6), and (S7) is performed.

Further, in S2 and S3, when it is determined that heating and cooling of the ATF in the heat storage tank 44 is not necessary, the control unit 52 switches the switching valves 48, 50, 68,
By controlling the opening and closing of the heat storage tank 70, the ATF is not used as the circulation of the main circuit or the circulation through the heat storage tank bypass pipe 72 (S12).

As described above, a series of operations of the transmission fluid temperature adjusting means according to the present invention are performed.

FIG. 6 shows the heat storage tank 44 shown in FIG.
Is shown. In FIG. 6, the heat storage tank 44
Has a chemical reaction heat storage material 84 for storing heat used for adjusting the temperature of the ATF. This chemical reaction heat storage material 8
4, for example, water, ammonia,
Amines, hydrogen, alcohols and the like are used, and solid substances such as solid adsorbents, solid salts, amine complexes, and metal hydrides are used in the gas-solid system, and acids, hydroxides, solid salts, and the like are used in the gas-liquid system. Liquids such as aqueous solutions and organic solutions are used.

In the case of the heat storage tank 44 using the chemical reaction heat storage material 84 as described above, there is no need to store cooling water, and the apparatus can be downsized.

The chemical reaction heat storage material 84 is stored in a plurality of chemical substance tanks 86, and the chemical substance tank 86 is stored in the heat storage tank 44 covered with a heat insulating material 74. Further, a heat absorbing / radiating portion 88 is provided inside the heat storage tank 44, and moves between the chemical substance tanks 86 while absorbing and radiating heat via the chemical reaction heat storage material 84. In addition, the heat absorbing and dissipating portion 8
8, a heat exchange pipe 78 is formed. ATF is
Heat exchange pipe 7 from bypass pipe 42 through inlet 80
After passing through the inside 8 and exchanging heat with the chemical reaction heat storage material 84, it goes out of the outlet 82 to the bypass pipe 42.

The heat storage tank 44 using the chemical reaction heat storage material 84 is also used as a warmer and a cooler, as in the example using the latent heat material 76 shown in FIG.

FIG. 7 is a flow chart showing the operation of the transmission fluid temperature adjusting means according to the present invention when the heat storage tank 44 having the chemical reaction heat storage material 84 is used. In FIG. 7, first, it is confirmed whether or not the system is normal (S100). If the system is normal, it is next determined whether the season is summer or winter (S102, S1).
03). When the season is summer (S102), the heat storage tank 44 is used as a cooler for the ATF (S104).
This is the same as S1 to S4 in FIG.

Next, the control unit 52 calculates the temperature of the outside air, the temperature of the ATF in the automatic transmission 18 and the temperature of the ATF in the heat storage tank 44, and the like.
The flow rate of the ATF flowing in the heat storage tank 44 is calculated. This AT
The F flow rate is calculated, for example, as shown in FIG.
5). The control unit 52 also calculates a time T2 until the chemical reaction of the chemical reaction heat storage material 84 progresses and the temperature actually decreases. After that, it waits until the time T2 elapses (S1
06), the control unit 52 switches the switching valves 48, 50, 68, 7
Opening / closing such as 0 is controlled, the ATF circulation path is switched to the bypass circuit, that is, the heat storage tank 44 side, and flow rate control is performed (S107). Thus, in the present embodiment, the ATF circulation start timing is determined in consideration of the chemical reaction time of the chemical reaction heat storage material 84.

As in the case of S7 in FIG. 5, when the vehicle starts to run for the first time after a long term stop, the A
When the control unit 52 determines that it is necessary to increase the circulation flow rate of the TF, the control unit 52 starts the auxiliary pump 40 and performs control as shown in FIG. 4 (S108).

Next, when the season is winter (S103),
The heat storage tank 44 is used as an ATF warmer (S109). Thereafter, the calculation of the ATF flow rate and the calculation of the time T1 until the chemical reaction of the chemical reaction heat storage material 84 progresses and the temperature actually rises (S110), wait for the elapse of the time T1 (S111), and switch the ATF circulation path (S11
2) In starting the auxiliary pump (S113), the above (S105), (S106), (S107), (S10)
Control similar to 8) is performed.

Further, as in the case of S12 in FIG.
At 102 and S103, the AT in the heat storage tank 44
If it is determined that heating and cooling of F is not necessary, the control unit 52 controls the opening and closing of the switching valves 48, 50, 68, and 70, and circulates the ATF through the main circuit or the heat storage tank bypass pipe 72. As a result, the heat storage tank 44 is not used (S114).

As described above, a series of operations of the transmission fluid temperature adjusting means according to the present invention are performed.

[0053]

As described above, according to the present invention,
It is possible to provide a transmission fluid temperature adjusting means which is small in size and can cope with both heating and cooling.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a vehicle drive device according to the present invention.

FIG. 2 is a structural diagram of the heat storage tank shown in FIG.

FIG. 3 is a diagram illustrating an example of an ATF flow rate that passes through a heat storage tank according to an ATF temperature in the transmission illustrated in FIG. 1;

FIG. 4 is a diagram showing an example of a control method of an ATF flow rate flowing in the heat storage tank shown in FIG.

FIG. 5 is a flowchart showing the operation of the transmission fluid temperature adjusting means according to the present invention shown in FIG. 1;

FIG. 6 is a diagram showing a modification of the heat storage tank shown in FIG.

7 is a flowchart showing the operation of the transmission fluid temperature adjusting means according to the present invention when the heat storage tank having the chemical reaction heat storage material shown in FIG. 6 is used.

[Explanation of symbols]

Reference Signs List 10 vehicle drive device, 12 internal combustion engine, 14 rotating electric machine, 18 automatic transmission, 20 torque converter, 22
Gear transmission section, 24 fluid pressure control section, 32 radiator, 36 hydraulic pump, 38 hydraulic pipe, 40 auxiliary pump, 42 bypass pipe, 44 heat storage tank, 48,
50, 68, 70 switching valve, 52 control unit, 54 vehicle speed sensor, 56 transmission temperature sensor, 58 tank temperature sensor, 60 shift position sensor, 62 outside air temperature sensor, 64 storage unit, 72 heat storage tank bypass pipe, 7
4 Insulation material, 76 Latent heat material, 78 Heat exchange pipe, 80
Inlet, 82 outlet, 84 chemical reaction heat storage material, 86 chemical substance tank, 88 heat absorption and radiation part.

Claims (4)

[Claims] 1. A temperature control device for a transmission fluid used in a transmission of a vehicle drive device, wherein latent heat for storing heat used for temperature control of the transmission fluid in a fluid passage. Temperature control means for a transmission fluid, comprising: a heat storage means having a material; and the latent heat material is made of two or more kinds of materials having different melting points. 2. A temperature adjusting means for a transmission fluid used in a transmission of a vehicle drive device, wherein latent heat for storing heat used for temperature adjustment of the transmission fluid in a fluid passage. A temperature adjusting device for a transmission fluid, comprising: a heat storage unit having a material; and wherein the heat storage unit is switched to a warmer or a cooler. 3. A temperature adjusting means for a transmission fluid used in a transmission of a vehicle drive device, wherein the means for storing heat used for temperature adjustment of the transmission fluid in a fluid passage. A heat storage means having a reaction heat storage material is provided, and when circulating a transmission fluid through the heat storage means, a circulation start time is determined in consideration of a chemical reaction time of the chemical reaction heat storage material. Temperature control means for transmission fluid. 4. A temperature adjusting means for a transmission fluid used in a transmission of a vehicle drive device, wherein a chemical for storing heat used for adjusting the temperature of the transmission fluid in a fluid passage is provided. Temperature control means for a transmission fluid, comprising: heat storage means having a reaction heat storage material, wherein the heat storage means is switched to a warmer or a cooler.