JPH07205792A - Method and device for controlling fluid type retarder device - Google Patents

Abstract

PURPOSE:To provide a device and method for controlling a fluid-type retarder device capable of quickly coping with a trouble by judging the fluid-type retarder device in trouble with an operator given an alarm by an alarm means in the case that a cooling system or operating system is in the trouble. CONSTITUTION:In a fluid-type retarder device provided with a fluid temperature detecting means 41, 42 for outputting a detection value by detecting a temperature of operating fluid of a fluid-type retarder 11 to disconnect a clutch device 13 by a driving gear 17 in the case of detecting a prescribed temperature or more by the fluid temperature detecting means 41, 42, after the clutch device 13 is disconnected, based on detecting the prescribed temperature or more, in the case that detecting the prescribed temperature or more is continued by the fluid temperature detecting means 41, 42 despite the lapse of prescribed time, an alarm is given by an alarm means 53.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a fluid retarder device and the device therefor.

[0002]

2. Description of the Related Art There are known large vehicles such as trucks and buses equipped with a fluid retarder device. The fluid retarder device generates a braking torque when descending a slope, decelerating from a high speed, or the like to prevent a fade due to an increase in temperature of the friction brake device, thereby improving the safety of the vehicle and the durability of the friction material. A fluid retarder device is a fluid retarder that includes a rotor that can be fixed to a rotating shaft that rotates together with wheels such as a propeller shaft, and a stator that is non-rotatably fixed to the vehicle body side. The rotor is connected and fixed to the shaft side to stir the working liquid by the rotor, and the braking torque is generated by the friction loss of the working liquid and the loss of collision with the stator.

With the operation of the fluid type retarder,
For example, Japanese Patent Laid-Open No. 5-262221 discloses that the clutch device is disengaged and the operation of the fluid retarder is forcibly stopped when the temperature of the working liquid rises to a relatively high temperature (eg, 150 ° C.) or higher. It is described in.

However, in such a conventional fluid type retarder device, when a failure occurs in the cooling system or the working system of the fluid type retarder, the temperature drop of the working liquid cannot be satisfactorily lowered, so that the rubber type retarder device is made of rubber. Deteriorates the seal member of
There is a technical problem that liquid leakage may occur. The failure of the cooling system or the operating system includes, for example, sticking of a switching valve for operating the clutch device, poor circulation operation of a pump for circulating the working liquid, poor circulation of the working liquid cooler, or poor cooling.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional technical problems.
According to the invention, the fluid type retarder 11 is provided on the rotating shaft 10 that rotates together with the wheels, is constantly filled with the working liquid, and includes the rotor 16 and the non-rotating stator 15.
A clutch device 13 that is driven by a drive device 17 to connect or disconnect the rotor 16 and the rotating shaft 10;
A retarder switch 5 having an OFF position for disconnecting the clutch device 13 by the drive device 17 to bring the fluid type retarder 11 into an inoperative state, and an ON position for connecting the clutch device 13, and an operation of the fluid type retarder 11. Liquid temperature detecting means 41, 42 for detecting the temperature of the liquid and outputting the detected value
A fluid type retarder device for disconnecting the clutch device 13 by the drive device 17 when the liquid temperature detecting means 41, 42 detects a temperature equal to or higher than a predetermined temperature. After the clutch device 13 is disengaged based on the above, the warning means 53 gives a warning when the liquid temperature detection means 41, 42 continue to detect a temperature equal to or higher than a predetermined temperature even after a predetermined time has elapsed. Is a control method for a fluid type retarder device. According to a second aspect of the present invention, a fluid type retarder 11 is provided which is provided on a rotary shaft 10 which rotates together with a wheel, is constantly filled with a working liquid, and includes a rotor 16 and a non-rotating stator 15.
A clutch device 13 driven by a drive device 17 to connect or disconnect the rotor 16 and the rotary shaft 10, and a non-operating state of the fluid retarder 11 by disconnecting the clutch device 13 by the drive device 17. A retarder switch 5 having an OFF position for supplying the clutch device 13 and an ON position for connecting the clutch device 13, and liquid temperature detecting means 41, 42 for detecting the temperature of the working liquid of the fluid type retarder 11 and outputting a detection value. When the liquid temperature detecting means 41, 42 detect a temperature equal to or higher than a predetermined temperature, the drive device 17 causes the clutch device 1 to operate.
A fluid-type retarder device for disconnecting 3, comparing the detection values of the liquid temperature detecting means 41, 42 with a reference value indicating the predetermined temperature, and determining the presence of a detection value equal to or higher than the predetermined temperature. After disconnecting the clutch device 13 based on the determination by the means 50 and the comparison means 50 that the temperature is equal to or higher than a predetermined temperature, a predetermined time determination means 51 that determines whether the temperature equal to or higher than the predetermined temperature is maintained for a predetermined time, and a predetermined time determination means A warning means 53 for issuing a warning when it is determined by 51 that the predetermined time is continued.
And a controller for a fluid type retarder device.

[Action]

According to the first aspect of the invention, when the relatively high predetermined temperature of the working liquid (eg, about 150 ° C.) is detected by the liquid temperature detecting means 41, 42, first, the clutch device 13 is disengaged. After that, the time during which the liquid temperature detecting means 41, 42 continues to detect the predetermined temperature or higher is measured. If the liquid temperature detecting means 41, 42 continue to detect the temperature equal to or higher than the predetermined temperature even after the lapse of the predetermined time, it is considered that the fluid retarder device is out of order, and the warning means 5 is issued.
3 gives a warning. With this warning (buzzer, lamp, etc.), it is possible to determine that the fluid type retarder device has failed and take necessary measures. The failure of the fluid type retarder device is mainly a failure of the cooling system or the operation system. Specifically, the switching valve attached to the clutch device 13 is fixed, the circulation failure of the pump for circulating the working liquid, and the cooler for the working liquid. Circulation failure or cooling failure. After stopping the operation of the fluid retarder 11,
When the temperature equal to or higher than the predetermined temperature is not maintained for the predetermined time, the warning means 53 does not give a warning to the driver. During this time, it is judged to be on standby and is not considered a failure.

According to the second aspect of the present invention, the values detected by the liquid temperature detecting means 41 and 42 and the predetermined temperature (for example, 150).
The comparison means 50 compares with a reference value indicating about (° C.). When the comparison unit 50 determines that the temperature is equal to or higher than the predetermined temperature, first, the clutch device 13 is disengaged, and then the liquid temperature detection units 41 and 42 set a predetermined time period during which the temperature is continuously detected. It is measured by the time determination means 51. If the liquid temperature detecting means 41, 42 continues to detect the temperature equal to or higher than the predetermined temperature despite the elapse of the predetermined time, it is considered that the fluid retarder device is out of order,
The warning means 53 gives a warning to the driver. After stopping the operation of the fluid retarder 11, if the predetermined temperature or higher is not maintained for the predetermined time and the predetermined time determination means 51 determines that the predetermined temperature or higher is not maintained, the warning means 53 is used. It does not warn the driver. However, during this period, it is determined that the robot is on standby, and it is not considered a failure.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show an embodiment of the present invention.
As shown in FIG. 1, the fluid retarder device includes a fluid retarder 11, a clutch device 13, and a pneumatic cylinder device 17.
A fluid type retarder unit 1, a cooler / pump unit 2, a pressure control device 3, a pressure air source 4, and a retarder switch 5 are included as main components. The fluid retarder 11 is
A non-rotating case 11c fixed to a vehicle body side member such as a transmission rear cover (not shown) is provided.
A rotary shaft 10, one end of which is connected to a transmission output shaft or the like, rotatably and liquid-tightly penetrates through the center of the shaft with an appropriate seal member and a bearing interposed. The other end of the rotary shaft 10 is connected to wheels via a propeller shaft (not shown) and rotates together with the wheels.

In this way, the retarder chamber 12 which is partitioned by the case 11c around the rotary shaft 10 and which is always filled with the working liquid (oil or water) is liquid-tightly defined. In the retarder chamber 12, a stator 15 having radial vanes centering on the rotary shaft 10 is provided, and also radial vanes centering on the rotary shaft 10 are provided to rotate facing the stator 15. A rotor 16 is provided on a member on the shaft 10 side so that the rotor 16 can be fixed so as not to rotate relative to the shaft 10. Stator 15
Is integrally formed with the case 11c and is fixed to the vehicle body-side member in a substantially non-rotatable manner.

Further, the case 11c includes a retarder chamber 12
A working liquid inlet 11a is provided at the center of
The working liquid outlet 11 is located at the outer peripheral portion of the retarder chamber 12.
b is provided.

Further, the rotating shaft 1 is provided on the inner peripheral portion of the rotor 16.
A wet multi-plate clutch device 13 capable of connecting or disconnecting the 0-side member and the rotor 16 is provided. The clutch device 13 is
A plurality of annular pressure plates 14 and a rotor 16 are fixed to the case 16, and the case 11c has a first bearing 13
A cylindrical support member 19 which is rotatably supported via a, supports an appropriate pressure plate 14 by spline connection, and supports slidably in the central axis direction, and a movable pressure plate 14 located at one end. And a second bearing 13b which is freely supported.

A pneumatic cylinder device 17, which is a drive device, is attached to the clutch device 13. The pneumatic cylinder device 17 includes a pressure chamber 17c defined by a diaphragm 17a, a diaphragm 17a, and a second bearing 13b.
And a connecting member 17b for connecting with. On the other hand, the plurality of clutch plates 18 are spline-coupled to the rotary shaft 10 so as to be movable in the axial direction.
It is sandwiched between four.

However, if the pressure air from the pressure air source 4 is supplied to the pressure chamber 17c of the pneumatic cylinder device 17 through the first switching valve 31 described later, the diaphragm 17a, the connecting member 17b and the second bearing 13b. The movable pressure plate 14 located at one end is pushed in via the clutch plate 1 that rotates integrally with the rotating shaft 10.
Since each pressure plate 14 is pressed against 8,
The clutch device 13 is connected. This makes case 1
Since the cylindrical support member 19 rotatably supported on the 1c via the first bearing 13a rotates, the rotor 16 integrated with the support member 19 rotates integrally with the rotary shaft 10. Then, the kinetic energy of the liquid filled between the rotor 16 and the stator 15 is converted into heat energy to generate a braking torque.

The pressure control device 3 includes a first switching valve 31.
And a second switching valve 32. The first switching valve 31 is provided with a pressure reducing valve 35 between the pressure air source 4 and the pressure chamber 17c of the pneumatic cylinder device 17, and the pressure air of the pressure air source 4 is pressure chamber 17c via the pressure reducing valve 35. And a position for draining the pressure chamber 17c. Further, the second switching valve 32 includes a pair of pressure reducing valves 33 and 34 connected in parallel on the upstream side, and is provided with the pressure air source 4 and the air chamber 25d of the air-liquid conversion device 25 described later.
And a low pressure position c and a high pressure position d for supplying the pressure air of the pressure air source 4 to the air chamber 25d via one of the pressure reducing valves 33 or 34. The second switching valve 32 and the air chamber 25d are connected by a pipe 36.

Since the pair of pressure reducing valves 33 and 34 are set to different set pressures, the pressure air of the pressure air source 4 is reduced by one pressure depending on the c position of the second switching valve 32 in the normal state. The pressure is adjusted to a relatively low set pressure by the valve 33 and supplied to the air chamber 25d of the air-liquid conversion device 25. Further, the second switching valve 32 is switched to the d position, so that the pressure air of the pressure air source 4 is changed. Is decompressed and adjusted to a relatively high set pressure by the other decompression valve 34 and supplied to the air chamber 25d of the air-liquid conversion device 25. Therefore, the pair of pressure reducing valves 33 and 34 including the second switching valve 32 function as pressure reducing valves capable of switching the pressure of the air supplied from the pressure air source 4 to the air-liquid conversion device 25 to at least high pressure and low pressure. To do. The pressure reducing valves 33 and 34 can relieve the pressure on the secondary side, that is, on the air chamber 25d side of the air-liquid conversion device 25.

Such a first switching valve 31 and a second switching valve
The switching valve 32 is connected to the retarder switch 5,
Both valves 31 or 32 can be selected and switched and connected. That is, the retarder switch 5 has the first
The OFF position that causes the switching valve 31 to take the a position, the first position
A low braking position that causes the switching valve 31 to take the b position and a second switching valve 32 to take the c position, and a high braking position that causes the first switching valve 31 to take the b position and the second switching valve 32 to take the d position. Has a braking position. The low braking position and the high braking position are ON positions.

On the other hand, the working liquid inlet 11a provided in the case 11c is connected to the working liquid outlet 11b provided in the case 11c via the closed circuit 21 and the cooler pump unit 2. That is, the closed circuit 21 is connected to the pump 22 and the working liquid cooler 23 (radiator) that sequentially circulate the working liquid from the working liquid inlet 11a side. The pump 22 is rotationally driven by an electric motor 22a, and the hydraulic fluid cooler 23 is air-cooled by a fan 23a.

Further, an empty liquid for exerting air pressure on a suitable portion of the closed circuit 21 (one end portion of the working liquid cooler 23 in the illustrated embodiment) to the working fluid of the closed circuit 21 and further of the hydraulic retarder 11. The conversion device 25 is connected via a pipe 28. The air-liquid conversion device 25 includes an air-liquid conversion device body 25.
A rubber film 25b, which is an airtight and easily deformable flexible film, partitions the interior of a into a working liquid chamber 25c and an air chamber 25d for storing the working liquid. The working liquid chamber 25c is always connected to the closed circuit 21, and the air chamber 25
d is connected to the pressurized air source 4 via either the above-mentioned second switching valve 32 or a pair of pressure reducing valves 33 and 34 connected in parallel to the upstream side, and pressurized air having a predetermined pressure is supplied to the air chamber 25d. Therefore, the pressure of the working liquid in the closed circuit 21 and thus in the fluid retarder 11 can be adjusted to a high or low level. The working liquid chamber 25c also functions as a working liquid reservoir.

A working liquid reservoir 27 is connected to the working liquid chamber 25c via a manual switching valve 26,
By switching the manual switching valve 26, the working liquid in the working liquid reservoir 27 can be supplied to the working liquid chamber 25c of the air-liquid conversion device 25.

A first liquid temperature detecting means 41, which is provided in the outer half of the fluid retarder 11 and detects a relatively high first predetermined temperature (for example, 150 ° C.) or higher of the working liquid,
The first liquid temperature detection means 4 is provided in the working liquid cooler 23.
The second predetermined temperature (for example, about 1
The second liquid temperature detecting means 42 for detecting the temperature of 50 ° C. or higher is provided. The reason why the first liquid temperature detecting means 41 is provided in the outer peripheral side half of the fluid type retarder 11 is that the inner peripheral side half of the fluid type retarder 11 in the stirring state by the rotor 16 is likely to cause cavitation and is in the stirring state. This is because it is difficult to accurately grasp the temperature of the working liquid. The temperature detected by the second liquid temperature detecting means 42 is set slightly lower (about 10 to 20 ° C.) than the temperature detected by the first liquid temperature detecting means 41, and flows out from the working liquid outlet 11b of the retarder chamber 12, It is possible to consider the temperature decrease of the working liquid during the period of flowing through the closed circuit 21 and flowing into the working liquid cooler 23. In addition,
The above-mentioned first and second predetermined temperatures (for example, 150 ° C.) are set to be slightly lower than the actual temperature at which overheating occurs so that even an instantaneous temperature rise can be detected.

The first liquid temperature detecting means 41 or the second liquid temperature detecting means 42 indicates to either one of the liquid temperature detecting means 41 or 42 that the working liquid has risen to the first and second predetermined temperatures. When it is detected, the pneumatic cylinder device 17 is drained to drive the clutch device 1.
It functions to disconnect 3 and stop the operation of the fluid retarder 11. The return drive of the pneumatic cylinder device 17 is actually performed by cutting the switch 43 to switch the first switching valve 31 to the a position and returning the diaphragm 17a and the connecting member 17b by a spring (not shown). . At the same time, warning means such as a warning buzzer (not shown) is activated to warn the driver that the working fluid has risen to the first predetermined temperature. Of course, when the working liquid drops below the first predetermined temperature, the switch 43 is connected.

Further, there is provided a third liquid temperature detecting means 44 comprising a switch for detecting a temperature equal to or higher than a third predetermined temperature (for example, 120 ° C.) in the middle of the working liquid. This third liquid temperature detecting means 44
Is usually provided in the fluid retarder 11, but can also be provided in the closed circuit 21 such as the working liquid cooler 23. When the third liquid temperature detecting means 44 detects that the working liquid has risen to the third predetermined temperature, the second switching valve 3
The c position is set to 2 and the pressure of the air supplied to the air-liquid conversion device 25 is switched to the low pressure side. Actually, the switch 45 is cut off, the second switching valve 32 is set to the c position, and the switching to the d position is prohibited. At the same time, warning means such as a warning lamp (not shown) is activated to warn the driver that the working liquid has risen to the third predetermined temperature. Of course, if the working liquid drops below the third predetermined temperature, switch 45 is reconnected.

Further, a fourth liquid temperature detecting means 46 for detecting a relatively low fourth predetermined temperature (for example, 85 ° C.) or higher of the working liquid.
To provide. The fourth liquid temperature detecting means 46 is usually provided in the working liquid cooler 23, but can also be provided in the fluid retarder 11 or the closed circuit 21. When the fourth liquid temperature detecting means 46 detects that the working liquid has risen to the fourth predetermined temperature, the electric motor 22a rotationally drives the pump 22 to circulate the working liquid and the fan 23a. Thus, the working liquid cooler 23 is air-cooled. Of course, when the working liquid drops below the fourth predetermined temperature, the driving of the pump 22 and the fan 23a is stopped.

The first liquid temperature detecting means 41, the second liquid temperature detecting means 42, the third liquid temperature detecting means 44, and the fourth liquid temperature detecting means 46 are incorporated in the microcomputer 100 as shown in FIG. The connection is made to perform the above operation. As shown in FIG. 2, the microcomputer 100 detects the detection values of the first and second liquid temperature detecting means 41 and 42 and the first and second predetermined values for the first and second liquid temperature detecting means 41 and 42. Compared with the reference value indicating the temperature,
Comparing means 5 for judging the presence of a detected value that is equal to or higher than a predetermined temperature
It functions as 0 and the predetermined time determination means 51. That is, when the comparing means 50 determines that there is a detected value indicating the first or second predetermined temperature or higher, the predetermined time determining means 51 determines whether or not the detected value continues for a predetermined time or longer. It is judged whether or not the warning means 53 is operated based on the judgment result.

As a result, the first and second comparison means 50
If it is determined that the detected value indicating the second predetermined temperature or more is output from the first and second liquid temperature detecting means 41, 42, the clutch device 13 is disengaged by the pneumatic cylinder device 17 and the hydraulic retarder. After the operation of 11 is stopped, the predetermined time determination means 51 determines whether or not the first and second predetermined temperatures or higher are maintained for a predetermined time or longer. This first, second
When the predetermined time determination unit 51 determines that the predetermined temperature or more is maintained for the predetermined time or longer, it is considered that the fluid retarder device is out of order, the warning unit 53 is activated, and the driver is again warned. As the warning unit 53, a warning buzzer, a warning lamp, or the like can be appropriately adopted, and the warning buzzer for warning the rise to the first to third predetermined temperatures,
Differentiate from the warning lamps by using different tones and colors.

The predetermined time determination means 51 determines whether or not the output time of the detected value continues for a predetermined time, specifically about 10 minutes. However, this predetermined time (about 10 minutes)
Varies depending on the vehicle type, in particular, the capacity of the hydraulic fluid cooler 23, and about 5 to 15 minutes is suitable. Of course, with the switch 43 disconnected and the operation of the fluid retarder 11 stopped, the pump 22 is operated by the electric motor 22a.
Is driven to rotate to maintain the circulating state of the working liquid, and the fan 23a is used to cool the working liquid cooler 23.
Continue to air cool.

Next, the operation of the above embodiment will be described. First, when the vehicle is in a normal deceleration running state by an exhaust brake (not shown), if the retarder switch 5 is switched to, for example, the low braking position, the pressure air from the pressure air source 4 becomes
It is introduced into the pressure chamber 17c of the pneumatic cylinder device 17 via the first switching valve 31, and the clutch device 13 is connected. That is, when the first switching valve 31 is switched to introduce the pressure air from the pressure air source 4 into the pressure chamber 17c, the connecting member 17b is pushed through the diaphragm 17a, so that the clutch plate rotating integrally with the rotary shaft 10 is pushed. The pressure plate 14 supported by the second bearing 13b is pressed against 18, and the clutch device 13 is connected.

As a result, the first bearing 13 is attached to the case 11c.
Since the support member 19 that is rotatably supported via a or the like rotates, the rotor 16 that is integral with the support member 19 does not rotate.
And start to rotate together. At that time, the second switching valve 32
Takes the position c, and the pressure air of the pressure air source 4 is decompressed and adjusted by one pressure reducing valve 33 to a relatively low set pressure and supplied to the air chamber 25d of the air-liquid conversion device 25, so that the set pressure is relatively low. A relatively small braking torque is generated in the hydraulic retarder 11 according to the above. That is, by the self-pumping action of the rotor 16, the kinetic energy is given by the stirring of the rotor 16 in the circulating state in which the working liquid also serving as the cooling flows in from the working liquid inlet 11a and flows out from the working liquid outlet 11b. The working liquid collides with the stator 15 and is transferred to the working liquid as heat to obtain a braking action. At the same time, the working liquid also cools the clutch device 13.

Next, when the retarder switch 5 is switched to the high braking position, the second switching valve 32 is switched to the d position with the clutch device 13 still connected, and the pressure air of the pressure air source 4 is depressurized to the other side. The pressure is adjusted to a relatively high set pressure by the valve 34 and supplied to the air chamber 25d of the air-liquid conversion device 25, and a relatively large braking torque corresponding to the relatively high set pressure is generated in the fluid retarder 11. In this way, the vehicle slows down.

During the operation of the fluid retarder 11, the working liquid has a relatively low fourth predetermined temperature (for example, 80).
C.), this is detected by the fourth liquid temperature detecting means 46, the pump 22 is rotationally driven by the electric motor 22a, and the working liquid cooler 23 is driven by the fan 2
It is air cooled by 3a.

Further, when the temperature of the working liquid rises and the third predetermined temperature (for example, 120 ° C.) in the middle of the working liquid is detected by the third liquid temperature detecting means 44, the switch 45 is opened and actuated. , The alarm lamp lights up. Then, since the switch 45 is opened and actuated, the retarder switch 5
Is switched to the high braking position, the second
The switching valve 32 is set to the c position, and the air-liquid conversion device 2
The air chamber 25d of No. 5 is supplied with relatively low pressure air only from one pressure reducing valve 33.

When the detection signal from the third liquid temperature detecting means 44 does not exist, the switch 45 is closed so that the second switching valve is operated when the retarder switch 5 is switched to the high braking position. It is naturally possible to switch 32 to the d position.

Further, the temperature of the working liquid rises, and the relatively high first or second predetermined temperature (for example, about 150 ° C.) of the working liquid is determined by either the first liquid temperature detecting means 41 or the second liquid temperature detecting means 42. If it is detected by, the switch 43 is disconnected, the first switching valve 31 is switched to the a position, and the buzzer sounds an alarm. As a result, the pressure chamber 17c of the pneumatic cylinder device 17 is drained, the diaphragm 17a and the connecting member 17b are returned by the spring (not shown), and the clutch device 13 is disconnected.

In this way, even though the retarder switch 5 is in the low braking position or the high braking position, the operation of the fluid retarder 11 is stopped, so that the fluid retarder 11 is stopped.
Overheating is prevented. In this way, the first or second predetermined temperature of the working liquid, which is relatively high, is detected by the first liquid temperature detecting means 4
Since the detection is performed by either one of the first and second liquid temperature detecting means 42, the first liquid temperature detecting means 41 is provided in the outer peripheral half of the fluid type retarder 11, and the rotor 16 In comparison with the fact that the temperature of the working liquid in the fluid type retarder 11 in the agitated state is detected relatively accurately,
The possibility of overheating of the fluid type retarder 11 can be accurately detected.

Further, the first or second relatively high working liquid
The predetermined temperature (for example, about 150 ° C.) is the first liquid temperature detecting means 4
If it is detected by either one of the first and second liquid temperature detecting means 42, it is controlled according to the flowchart shown in FIG. First, if it is determined by the comparison means 50 in step (a) that there is a detected value that is equal to or higher than the first and second predetermined temperatures, the clutch device 13 is disengaged in step (b), and the hydraulic retarder. 11 stops. Then, the process proceeds to step (c) and the predetermined time determination means 51
Therefore, it is determined whether or not the detected value is present for a predetermined time or longer. If the detected value does not exist for a predetermined time or more, the process returns to step (a), and if it exists for the predetermined time or more, the process proceeds to step (d), which is regarded as a failure of the fluid type retarder device, and the warning means 53. Is activated and the driver is warned again. The failure of the fluid retarder device is mainly a failure of the cooling system or the operation system, and specifically, the first switching valve 31 attached to the clutch device 13 is fixed,
There are defective circulation operation of the pump 22 for circulating the working liquid, defective circulation of the working liquid cooler 23, defective cooling, and the like.

Even when the detected values that are equal to or higher than the first and second predetermined temperatures exist for a predetermined time or longer, the clutch device 13
The instruction to cut off the hydraulic retarder 11 to stop the operation of the fluid retarder 11 is still given, and the pump 22 is driven to rotate by the electric motor 22a to maintain the circulating state of the working liquid, and the fan 23a. Therefore, the working liquid cooler 23 is continuously air-cooled. In addition, the fluid type retarder 1
When the first and second predetermined temperatures are not maintained for a predetermined time after the operation of No. 1 is stopped and the predetermined time determination means 51 determines that the first and second predetermined temperatures are not maintained, The warning means 53 does not give a warning to the driver. However, during this period, it is determined that the robot is on standby, and it is not considered a failure.

When the retarder switch 5 is switched to the OFF position to perform the OFF operation, the clutch device 13 is disengaged, the rotation of the rotor 16 is stopped, and the second switching valve 32, which is in the d position, returns to the c position. . By the way, the first and second liquid temperature detecting means 41, 42 can be constituted by switches, and when they are constituted by the switches, the comparing means 50 is constituted by the first and second liquid temperature detecting means 41, 42. Four
It will be incorporated into 2.

[0038]

As can be understood from the above description,
According to the control method of the fluid type retarder apparatus and the apparatus thereof according to the present invention, in the case of failure of the cooling system or the operating system, the warning is given to the driver by the warning means, so that the fluid type retarder apparatus is in failure. It can be determined and can be dealt with promptly. As a result, the problem caused by the continuous operation of the fluid retarder device, that is, the problem that the temperature rise of the working liquid does not stop, the rubber seal member is deteriorated, and liquid leakage may occur, is solved.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a control device of a fluid type retarder device according to an embodiment of the present invention.

FIG. 2 is a layout diagram of the same components.

FIG. 3 is a diagram showing a flowchart of the same.

[Explanation of symbols]

1: Fluid type retarder unit, 2: Cooler / pump unit, 3: Pressure control device, 4: Pressure air source, 5: Retarder switch, 10: Rotating shaft, 11: Fluid type retarder, 1
1a: working liquid inlet, 11b: working liquid outlet, 11c:
Case, 12: retarder chamber, 13: clutch device, 13
a: first bearing, 13b: second bearing, 14: pressure plate, 15: stator, 16: rotor, 17: pneumatic cylinder device (driving device), 17a: diaphragm, 1
7c: pressure chamber, 18: clutch plate, 19: support member, 21: closed circuit, 22: pump, 22a: electric motor, 23: cooler for working liquid, 25: air-liquid conversion device, 2
5a: Air-liquid conversion device main body, 25b: Rubber film, 25c: Working liquid chamber, 25d: Air chamber, 31: First switching valve,
32: second switching valve, 33, 34: pressure reducing valve, 4
1: 1st liquid temperature detection means, 42: 2nd liquid temperature detection means, 4
3, 45: switch, 44: third liquid temperature detecting means, 46:
Fourth liquid temperature detection means, 50: comparison means, 51: predetermined time determination means, 53: warning means, 100: microcomputer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Seiichi Yoshihara, 5-4-71 Higashi, Hanyu-shi, Saitama Prefecture, Akebono Break Industry Co., Ltd. (72) Yoshihiko Suzuki, 5-4-1, Higashi, Hanyu, Saitama Akebono Break Industry Co., Ltd.

Claims (2)

[Claims] 1. A rotor (1) is provided on a rotating shaft (10) that rotates together with a wheel, and is filled with a hydraulic fluid at all times.
6) and a hydrodynamic retarder (11) comprising a non-rotating stator (15) and driven by a drive (17),
A clutch device (13) for connecting or disconnecting the rotor (16) and the rotating shaft (10), and a clutch device (13) for disconnecting the clutch device (13) by the drive device (17) are used for the fluid retarder (11). A retarder switch (5) having an OFF position for giving an inoperative state and an ON position for connecting a clutch device (13), and a liquid for detecting the temperature of the working liquid of the fluid type retarder (11) and outputting a detection value. Temperature detection means (4
1, 42), and when the liquid temperature detecting means (41, 42) detects a predetermined temperature or higher, the drive device (17)
A fluid type retarder device for disconnecting the clutch device (13) by means of the method, wherein the liquid temperature is maintained even after a predetermined time has elapsed after the clutch device (13) was disconnected based on detection of a predetermined temperature or higher. A method for controlling a fluid retarder device, wherein a warning means (53) gives a warning when the detection means (41, 42) continues to detect a temperature equal to or higher than a predetermined temperature. 2. A rotor (1) provided on a rotating shaft (10) which rotates together with a wheel, is filled with a working fluid at all times.
6) and a hydrodynamic retarder (11) comprising a non-rotating stator (15) and driven by a drive (17),
A clutch device (13) for connecting or disconnecting the rotor (16) and the rotating shaft (10), and a clutch device (13) for disconnecting the clutch device (13) by the drive device (17) are used for the fluid retarder (11). A retarder switch (5) having an OFF position for giving an inoperative state and an ON position for connecting a clutch device (13), and a liquid for detecting the temperature of the working liquid of the fluid type retarder (11) and outputting a detection value. Temperature detection means (4
1, 42), and when the liquid temperature detecting means (41, 42) detects a predetermined temperature or higher, the drive device (17)
A fluid type retarder device for disengaging the clutch device (13) by means of the method of: comparing a detection value of the liquid temperature detection means (41, 42) with a reference value indicating the predetermined temperature, and Comparing means (50) for judging the existence of a certain detected value
A predetermined time determination means (51) for determining whether the clutch device (13) is discontinued based on the comparison means (50) determining that the temperature is equal to or higher than a predetermined temperature and the temperature is equal to or higher than the predetermined temperature for a predetermined time. A control device for a fluid retarder device, comprising: warning means (53) for issuing a warning when the predetermined time determination means (51) determines that the predetermined time has continued.