JPH09256848A - Drive preventing device or radiator fan in noise measurement experiment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly and stably carry out the noise measuring experiment without troublesome works in a vehicle equipped with a radiator fan device having a fan clutch. SOLUTION: A drive preventing device is provided with a temperature sensor 6 to detect the atmospheric temperature, a temperature indicating monitor 7 to indicate the temperature detected by the temperature sensor 6, and a bimetal cooling device comprising a water tank 8, a nozzle 9 arranged opposite to the bimetal 3, a hose 10 to feed the water in the water tank 8 to the nozzle 9, and an electric water pump 11. In carrying out the indoor and outdoor noise measuring experiments, when the temperature indicated in the temperature indicating monitor 7 approaches the connection temperature of a fan clutch 5 of the bimetal 3, an operation switch 14 is turned ON, the electric water pump 11 is operated, the water in the water tank 8 is sprayed from the nozzle 9 to the bimetal 3 through the hose 10, the bimetal 3 is cooled therewith so that the temperature is dropped below the connection temperature of the fan clutch 5, and the disconnected condition of the radiator fan 2 from a rotary drive shaft 4 is kept to prevent the drive of the radiator fan 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to vehicle interior noise,
The present invention relates to a device that blocks driving of a radiator fan during noise measurement experiments such as outdoor noise.

[0002]

2. Description of the Related Art Conventionally, in a vehicle such as an automobile, a radiator fan provided facing a radiator and a bimetal for sensing an ambient temperature of the radiator are provided, and the radiator fan is operated by a bimetal operation according to the temperature. A radiator fan device including a fan clutch that connects and disconnects the rotary drive shaft is provided (see Japanese Utility Model Laid-Open No. 113741/1992).

[0003]

In a vehicle such as an automobile, a noise measurement experiment such as indoor noise and outdoor noise of the vehicle at a factory or the like has the following problems. That is, in the radiator fan device described above, due to the function of the bimetal, when the ambient temperature of the radiator becomes equal to or higher than the predetermined temperature, the fan clutch is operated so as to connect the radiator fan and its rotary drive shaft, and the radiator fan is driven. It has become so.

However, when a radiator fan is driven in this way during noise measurement experiments of vehicle interior noise, exterior noise, etc., the noise level changes, and if there is fan drive noise, noise is a problem. Vehicle interior noise during measurement experiments,
It cannot measure outdoor noise accurately and stably. In view of such circumstances, conventionally, during noise measurement experiments, the bimetal of the fan clutch is purposely removed to prevent the radiator fan from being driven at ambient temperature.

Therefore, it is necessary to attach and detach the bimetal of the fan clutch before and after the noise measurement experiment, which complicates the work. Therefore, in view of the conventional problems as described above, the present invention is configured to prevent the radiator fan from being driven at the ambient temperature while keeping the bimetal of the fan clutch attached, thereby performing a troublesome work. It is an object to enable accurate and stable noise measurement experiments to be performed without the need.

[0006]

Therefore, the invention according to claim 1 is provided with a radiator fan provided so as to face the radiator and a bimetal for sensing the ambient temperature of the radiator, and the bimetal according to the temperature. By operation,
In a radiator fan device including a radiator fan and a fan clutch that connects and disconnects the rotary drive shaft thereof, a device that blocks the drive of the radiator fan during a noise measurement experiment, wherein the ambient temperature of the radiator is Temperature detecting means for detecting, temperature displaying means for displaying the temperature detected by the temperature detecting means, a water tank, a nozzle arranged to face the bimetal, and water for supplying water in the water tank to the nozzle. When the temperature displayed on the temperature display means approaches the fan clutch connection operating temperature of the bimetal, the water supply means is actuated to supply water from the nozzle toward the bimetal. And a bimetal cooling device for cooling the bimetal below the fan clutch connection operating temperature. It was.

According to a second aspect of the present invention, in addition to the above configuration, the water level is detected based on a water level detecting means for detecting the water level in the water tank, an informing means, and a detection signal output from the water level detecting means. And a control unit that activates the notification unit when the level becomes lower than a predetermined level.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In FIG. 1, a radiator fan device includes a radiator fan 2 provided opposite to a radiator 1 and a bimetal 3 for sensing an ambient temperature of the radiator 1, and the radiator fan 2 is operated by the operation of the bimetal 3 according to the temperature. 2 and a fan clutch 5 that connects and disconnects the rotary drive shaft 4 thereof.

In this case, the fan clutch 5 is provided so as to project from the center of the radiator fan 2 toward the radiator 1, and the bimetal 3 is provided on the front surface thereof. In a vehicle such as an automobile equipped with such a radiator fan device, a device for preventing the driving of the radiator fan at the time of an indoor or outdoor noise measurement experiment is configured as follows.

That is, a temperature sensor 6 as a temperature detecting means for detecting the ambient temperature of the radiator 1, a temperature display monitor 7 as a temperature display means for displaying the temperature detected by the temperature sensor 6, and a water tank 8. A bimetal cooling device including a nozzle 9 arranged to face the bimetal 3 and a hose 10 as a water supply means for supplying water in the water tank 8 to the nozzle 9 and an electric water pump 11 is provided.

To explain this structure in detail, the temperature sensor 6 is attached to the nozzle 9, and its measuring portion is set in a direction in which the rear ambient temperature of the radiator 1 can be measured. The detection signal line from the temperature sensor 6 is connected to the control box 13 connected to the power supply 12.

The control box 13 is provided with the temperature display monitor 7, and the control signal line from the control box 13 is connected to the electric water pump 1.
1, the control box 13 is further provided with an operation switch 14 for operating the electric water pump 11. The nozzle 9 is connected to the bottom of the water tank 8 via a hose 10, and the electric water pump 11 is connected to the hose 10.

The nozzle 9 is positioned at the rear portion of the radiator 1 so that its injection port faces the bimetal 3. In the water tank 8, the water tank 8
Water level sensor 15 as water level detection means for detecting the internal water level
Is provided, and a notification means 1 such as a lamp or a buzzer
6 is provided in the control box 13, and a control circuit as a control means for lighting the lamp or operating a buzzer when the water level becomes lower than a predetermined level based on a detection signal output from the water level sensor 15. Is provided in the control box 13.

With such a structure, the control box 13 is used when performing noise measurement experiments inside or outside the vehicle.
When the temperature displayed on the temperature display monitor 7 approaches the fan clutch 5 connection operating temperature of the bimetal 3, the operation switch 14 is monitored.
Turn ON. As a result, the electric water pump 11 operates,
Water in the water tank 8 is jetted from the nozzle 9 toward the bimetal 3 via the hose 10.

Bimetal 3 with water sprayed in this way
Has its temperature lowered to be lower than the fan clutch 5 connecting operation temperature, so that the fan clutch 5 connecting operation is blocked. That is, since the fan clutch 5 is not connected, the disengaged state between the radiator fan 2 and its rotary drive shaft 4 is maintained, and the drive of the radiator fan 2 is blocked.

As a result of the above, during the noise measurement experiment of the vehicle interior noise, the exterior noise, etc., the level of the noise does not change due to the driving of the radiator fan 2, and if the fan drive noise is present, the noise that becomes a problem is generated. Vehicle interior noise during measurement experiments,
It becomes possible to measure outdoor noise accurately and stably.
Further, unlike the conventional case, it is not necessary to remove the bimetal of the fan clutch to prevent the radiator fan from being driven at ambient temperature, and it is not necessary to perform troublesome work each time.

When the water level in the water tank 8 falls below a predetermined level, a lamp is turned on or a buzzer is operated to issue an alarm for replenishing water. Therefore, the water injection to the bimetal 3 is not hindered and the water injection can always be performed reliably.

[0018]

As described above, according to the first aspect of the present invention, during the noise measurement experiment such as the indoor noise and the outdoor noise of the vehicle, the noise level changes due to the driving of the radiator fan. It is possible to accurately and stably measure the vehicle interior noise and outdoor noise during noise measurement experiments, where noise does not occur and there is a fan drive noise.In particular, an experiment is performed for the troublesome work such as removing the bimetal of the fan clutch. There is no need to do it each time.

According to the second aspect of the present invention, it is possible to notify that the water in the water tank is low and to prevent the water injection to the bimetal from being hindered. You can

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a drive blocking device for a radiator fan during a noise measurement experiment according to the present invention.

[Explanation of symbols]

 1 Radiator 2 Radiator fan 3 Bimetal 4 Rotation drive shaft 5 Fan clutch 6 Temperature sensor 7 Temperature display monitor 8 Water tank 9 Nozzle 10 Hose 11 Electric water pump 13 Control box 14 Operation switch 15 Water level sensor 16 Notification means

Claims (2)

[Claims] 1. A radiator fan provided facing a radiator, and a bimetal for sensing an ambient temperature of the radiator, and the bimetal operation according to the temperature disconnects the radiator fan and its rotary drive shaft. A radiator fan device including a fan clutch, which is a device for preventing driving of the radiator fan during a noise measurement experiment, the temperature detecting device detecting an ambient temperature of the radiator, and the temperature detecting device. The temperature display means for displaying the detected temperature, a water tank, a nozzle opposed to the bimetal, and a water supply means for supplying the water in the water tank to the nozzle are provided. When the temperature displayed on the display means approaches the operating temperature of the bimetal fan clutch connection, the water During the noise measurement experiment, the bimetal cooling device is configured to inject water from the nozzle toward the bimetal by operating the supply means to cool the bimetal to the fan clutch connection operating temperature or lower. Drive blocking device for radiator fan in. 2. In addition to the above configuration, based on a water level detecting means for detecting the water level in the water tank, an informing means, and a detection signal output from the water level detecting means,
The drive blocking device for a radiator fan during a noise measurement experiment according to claim 1, further comprising: a control unit that operates the notification unit when the water level falls below a predetermined level.