JP2007303451A - Cooling fan control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noise of a cooling fan with a simple constitution. <P>SOLUTION: This cooling fan control device 10 has a temperature detecting means 3 detecting the temperature of cooling water for cooling an internal combustion engine 50, a driving control means 2a controlling driving of the cooling fan 1 sending cooling air to the cooling water of an internal combustion engine 51 so that the temperature of the cooling water detected by the temperature detecting means 3 becomes the predetermined operation temperature or less, a position detecting means 4a detecting a present position of a vehicle, a map information storage means 4b storing map information, and a noise restraining area determining means 2b determining whether or not the present position of the vehicle exists in a noise restraining area for restraining noise of the cooling fan 1 on the basis of the present position of the vehicle detected by the position detecting means 4a and the map information stored by the map information storage means 4b. When determining that the present position of the vehicle exists in the noise restraining area by the noise restraining area determining means 2b, the driving control means 2a restricts the driving of the cooling fan 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cooling fan control device that controls a cooling fan for cooling a vehicle engine, for example.

2. Description of the Related Art Conventionally, a vehicle noise reduction device that emits sound pressure having the same amplitude and opposite phase as fan noise from a speaker to cancel the fan noise and sound pressure from the speaker to reduce noise is known (for example, patents). Reference 1).
Japanese Patent Laid-Open No. 7-189648

  However, in the above conventional vehicle noise reduction device, it is necessary to attach a speaker to the fan shroud, and a control unit for controlling the amplitude and phase of the speaker is required, which may complicate the configuration. In addition, when the fan is driven, the speaker is always driven to reduce fan noise, which may increase the power consumption of the vehicle.

  The present invention is for solving such problems, and a main object thereof is to reduce the noise of the cooling fan with a simple configuration.

In order to achieve the above object, one embodiment of the present invention provides:
Temperature detecting means for detecting the temperature of cooling water for cooling the internal combustion engine;
Drive control means for controlling the driving of a cooling fan that sends cooling air to the cooling water of the internal combustion engine so that the temperature of the cooling water detected by the temperature detection means is not more than a predetermined operating temperature;
Position detecting means for detecting the current position of the vehicle;
A cooling fan control device comprising map information storage means for storing map information,
Noise suppression that suppresses noise of the cooling fan based on the current position of the vehicle detected by the position detection means and the map information stored by the map information storage means. A noise suppression area determination means for determining whether or not the area is within the area;
The cooling fan, wherein when the noise suppression area determination means determines that the current position of the vehicle is within the noise suppression area, the drive control means restricts driving of the cooling fan. It is a control device.

  According to this aspect, when the noise suppression region determination unit determines that the current position of the vehicle is within the noise suppression region, the drive control unit limits the driving of the cooling fan. Thereby, the noise of the cooling fan can be suppressed in the noise suppression region. In addition, since the above effect can be realized without requiring a special control device or the like, the noise of the cooling fan can be reduced with a simple configuration.

  In this aspect, the noise suppression area may include an urban area and a parking lot. Thereby, the noise of a cooling fan can be reduced, for example in an urban area and a parking lot.

In this one aspect, time detection means for detecting the current time;
Noise suppression time zone determination means for determining whether or not the current time detected by the time detection means is within a noise suppression time zone for suppressing noise of the cooling fan;
When the noise suppression region determination means determines that the current position of the vehicle is within the noise suppression region, and the noise suppression time zone determination means determines that the current time is within the noise suppression time zone. When judged
The drive control unit may limit driving of the cooling fan. Thereby, the noise of the cooling fan can be suppressed within the noise suppression region and within the noise suppression time zone.

In order to achieve the above object, one embodiment of the present invention provides:
Temperature detecting means for detecting the temperature of cooling water for cooling the internal combustion engine;
Drive control means for controlling the driving of a cooling fan that sends cooling air to the cooling water of the internal combustion engine so that the temperature of the cooling water detected by the temperature detection means is not more than a predetermined operating temperature;
A cooling fan control device comprising time detection means for detecting the current time,
A noise suppression time zone determination unit that determines whether or not the current time detected by the current time detection unit is within a noise suppression time zone that suppresses noise of the cooling fan;
The cooling fan control, wherein when the noise suppression time zone determination means determines that the current time is within the noise suppression time zone, the drive control means limits the driving of the cooling fan. Device.

  According to this aspect, when the noise suppression time zone determination means determines that the current time is within the noise suppression time zone, the drive control means limits the driving of the cooling fan. Thereby, the noise of a cooling fan can be suppressed within a noise suppression time zone. In addition, since the above effect can be realized without requiring a special control device or the like, the noise of the cooling fan can be reduced with a simple configuration.

  In this aspect, the noise suppression time zone may include a night time zone and an early morning time zone. Thereby, the noise of a cooling fan can be reduced, for example in a night time zone and an early morning time zone.

  In these aspects, the drive control means may limit the drive of the cooling fan by increasing the predetermined operating temperature. Thereby, driving of the cooling fan can be easily limited.

  In these aspects, the drive control means may limit the driving of the cooling fan by suppressing an increase rate of the number of rotations of the cooling fan to a predetermined rate or less. Thereby, driving of the cooling fan can be easily limited.

  In these embodiments, a selection switch is further provided that can select a restriction mode in which the drive of the cooling fan is restricted by the drive control means and a normal mode in which the drive of the cooling fan is not restricted by the drive control means. Also good. Thereby, the drive of a cooling fan can be restrict | limited according to a user preference.

In these embodiments, the vehicle further comprises speed detecting means for detecting the speed of the vehicle,
When the speed of the vehicle detected by the speed detection means is equal to or lower than a predetermined speed, the drive control means may limit the driving of the cooling fan. Thereby, the drive of a cooling fan can be restrict | limited appropriately according to the speed of a vehicle. For example, when the driving of the cooling fan is restricted when the vehicle is stopped (vehicle speed is 0), noise suppression becomes more effective.

In these aspects, the battery further includes a storage amount detection means for detecting a storage amount of the vehicle battery,
The drive control unit may limit the driving of the cooling fan when the stored amount of the battery detected by the stored amount detection unit is equal to or less than a predetermined amount. Thereby, the drive of a cooling fan can be restrict | limited appropriately according to the electrical storage amount of a battery.

  According to the present invention, the noise of the cooling fan can be reduced with a simple configuration.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the accompanying drawings.
(First embodiment)
FIG. 1 is a block diagram showing an example of a system configuration of a cooling fan control device according to the first embodiment of the present invention. A cooling fan control device 10 according to the present embodiment is mounted on a vehicle, and is configured around an ECU (Electronic Control Unit) 2 that controls driving of a cooling fan 1 that cools a radiator 51 of an engine 50. Yes.

  The ECU 2 is composed of a microcomputer and executes various processes in accordance with control and calculation programs, and stores the CPU for controlling each part of the apparatus, the ROM for storing execution programs for the CPU, calculation results, and the like. It has a readable / writable RAM (Random Access Memory), a timer, a counter, an input / output interface, and the like.

  The ECU 2 is connected to a cooling fan 1 that sends cooling air to a radiator (internal combustion engine) 51 attached to an engine (internal combustion engine) 50. The cooling fan 1 includes an electric motor 1 a and a fan 1 b that is connected to a drive shaft of the electric motor 1 a and sends cooling air to the radiator 51 by rotating a plurality of blade members.

  The vehicle engine 50 is provided with a radiator 51 that cools the inside of the engine 50 by supplying cooling water to the inside of the engine 50. A circulation path is formed in the radiator 51, and the cooling water that has cooled the inside of the engine 50 circulates in this circulation path to dissipate heat. At this time, the cooling fan 1 disposed adjacent to the radiator 51 sends cooling air to the radiator 51, whereby the radiator 51 is radiated more efficiently and the engine 50 is cooled.

  The radiator 51 is provided with a temperature sensor (temperature detection means) 3 that detects the temperature of the cooling water circulating in the circulation path inside the radiator 51. The temperature sensor 3 is connected to the ECU 2, and the temperature of the cooling water detected by the temperature sensor 3 is transmitted to the ECU 2.

  A navigation device 4 for guiding the vehicle to the destination is connected to the ECU 2. The navigation device 4 includes a GPS receiving unit (position detecting unit) 4a that detects the current position of the vehicle, and a map information storage unit (map information storing unit) 4b that stores map information.

  A GPS (Global Positioning System) receiving unit 4a performs calculation based on positioning radio waves from a plurality of GPS satellites to detect the current position of the vehicle. The map information storage unit 4b stores the map information in a storage medium such as a CD, DVD, or HDD.

  Note that the map information stored in the map information storage unit 4b includes road area information and an area that is an urban area and parking lot position information. The GPS receiving unit 4a and the map information storage unit 4b are built in the navigation device 4. However, the GPS receiving unit (GPS receiving device) 4a and the map information are not built in the navigation device 4. The structure which has the memory | storage part (memory | storage device) 4b separately may be sufficient.

  A vehicle speed sensor (speed detection means) 5 for detecting the speed of the vehicle is connected to the ECU 2. The vehicle speed detected by the vehicle speed sensor 5 is transmitted to the ECU 2.

  The ECU 2 includes a drive control unit (drive control unit) 2a that controls driving of the cooling fan 1 and a noise suppression region determination unit (noise suppression region determination unit) 2b that determines a noise suppression region. In addition, the drive control part 2a and the noise suppression area | region determination part 2b are implement | achieved by the program memorize | stored in ROM of ECU2 and executed by CPU, for example.

  The drive control unit 2 a controls the cooling fan 1 based on the temperature of the cooling water in the radiator 51 detected by the temperature sensor 3. Further, the drive control unit 2 a drives the cooling fan 1 and sends cooling air to the radiator 51, thereby lowering the temperature of the cooling water of the radiator 51 and cooling the engine 50.

  For example, the drive control unit 2a controls the driving of the cooling fan 1 so that the temperature of the cooling water of the radiator 51 detected by the temperature sensor 3 is equal to or lower than a predetermined operating temperature T1. Specifically, the drive controller 2a starts driving the electric motor 1a of the cooling fan 1 when the temperature of the cooling water detected by the temperature sensor 3 exceeds a predetermined operating temperature T1.

  On the other hand, when the temperature of the cooling water detected by the temperature sensor 3 becomes equal to or lower than a predetermined operating temperature T1, the drive control unit 2a stops driving the electric motor 1a of the cooling fan 1. In this way, the inside of the engine 50 can be cooled and the engine 50 can be maintained at an optimum temperature.

  Further, the drive control unit 2 a controls the rotation speed of the electric motor 1 a of the cooling fan 1 according to the temperature of the cooling water detected by the temperature sensor 3. For example, the drive control unit 2a controls to increase the number of revolutions of the electric motor 1a of the cooling fan 1 as the rate of increase in the temperature of the cooling water detected by the temperature sensor 3 increases. Thereby, according to the temperature change of the cooling water of the radiator 51, appropriate cooling can be performed.

  Furthermore, the drive control part 2a controls the increase rate of the rotation speed in the electric motor 1a of the cooling fan 1 as needed. For example, the drive control unit 2a performs a so-called soft start in which the rotation rate of the electric motor 1a of the cooling fan 1 is reduced to a predetermined rate or less until the rotation rate of the electric motor 1a is reduced from a stopped state to a steady rotation state. Do. Thereby, the noise at the time of starting of the cooling fan 1 can be suppressed.

  The noise suppression area determination unit 2b determines whether or not the current position of the vehicle detected by the GPS reception unit 4a of the navigation device 4 is within the noise suppression area of the map information stored in the map information storage unit 2b. .

  Note that the noise suppression area is an area that is stored in advance in map information, for example, and it is better to suppress noise generated from the cooling fan 1 by limiting the driving of the cooling fan 1. For example, when the vehicle is within this noise suppression region, the driving of the cooling fan 1 is restricted, and the noise of the cooling fan 1 is suppressed.

  The noise suppression area includes an urban area and a parking lot adjacent to a private house. Moreover, although the noise suppression area | region is previously memorize | stored in map information, it may be comprised so that a user can newly add, delete, and change an area | region.

  Further, as described above, the drive control unit 2a does not restrict the driving of the cooling fan 1 in the restriction mode (low noise mode) in which the driving of the cooling fan 1 is restricted in the noise suppression area and the noise suppression area. And a normal mode.

  For example, a selection switch 6 that can be operated by a user is connected to the drive control unit 2a, and the drive control unit 2a switches between a restriction mode and a normal mode based on a signal from the selection switch 6.

  Specifically, when the selection switch 6 is turned on, it transmits an on signal to the drive control unit 2a. The drive control unit 2a enters the restriction mode based on the ON signal from the selection switch. On the other hand, when the selection switch 6 is turned off, it transmits an off signal to the drive control unit 2a. The drive control unit 2 a enters the normal mode based on the off signal from the selection switch 6.

  When the drive control unit 2a determines that the speed of the vehicle detected by the vehicle speed sensor 5 is equal to or lower than the predetermined speed and the vehicle speed is low or the vehicle is stopped (the vehicle speed is substantially 0), (FIG. 2A).

  This is because when the vehicle is traveling at a predetermined speed or more, noise (road noise generated from tires, noise due to air resistance, noise generated from the engine 50) resulting from the traveling of the vehicle is more effective for the cooling fan 1. This is because the noise is relatively larger than the noise generated by the driving.

  In addition, when the drive control unit 2a is in the limit mode, for example, the drive temperature of the cooling fan 1 is suppressed by increasing a predetermined operating temperature T1 (FIG. 2B). That is, when the temperature of the cooling water of the radiator 51 is increased by increasing the predetermined operating temperature T1, a certain amount of the increase is allowed. Therefore, the start frequency and driving time of the cooling fan 1 can be suppressed, and the noise of the cooling fan 1 can be reduced.

  Further, when the drive control unit 2a enters the restriction mode, for example, the above-described cooling fan 1 is soft-started (FIG. 2C). Thereby, the noise at the time of starting of the cooling fan 1 can be reduced.

  The drive control unit 2a may control the rotation of the electric motor 1a of the cooling fan 1 by well-known PID control. Here, PID (Proportional Integral Differential) control is control in which the operations of proportional P, integral I, and differential D are combined, and the transfer function includes a proportional term, an integral term, and a differential term.

  For example, by reducing the weights (coefficients) of the proportional term and the integral term and increasing the weight of the differential term, it is possible to maintain a low rotation speed while suppressing an increase in the rotational speed of the electric motor 1a of the cooling fan 1. . Thereby, the noise of the cooling fan 1 can be reduced.

  Next, a control processing flow of the cooling fan control device 10 according to the first embodiment will be described. FIG. 3 is a flowchart illustrating an example of a control processing flow of the cooling fan control device 10 according to the first embodiment. Note that the control processing shown in FIG. 3 and FIG. 5 described later is repeatedly executed every predetermined minute time.

  For example, the drive control unit 2a of the ECU 2 determines whether or not the vehicle speed detected by the vehicle speed sensor 5 is substantially 0 and the vehicle is stopped (S100).

  When the drive control unit 2a of the ECU 2 determines that the vehicle speed detected by the vehicle speed sensor 5 is substantially 0 and the vehicle is in a stopped state (Yes in S100), based on a signal from the selection switch 6, the restriction mode is set by the user. It is determined whether or not is selected (S110).

  On the other hand, when the drive control unit 2a of the ECU 2 determines that the vehicle speed detected by the vehicle speed sensor 5 is not 0 and is in a traveling state (No in S100), the process proceeds to the process of (S140) described later.

  When the drive control unit 2a of the ECU 2 receives the ON signal from the selection switch 6 and determines that the user has selected the restriction mode (Yes in S110), the noise suppression region determination unit 2b It is determined whether or not the current position of the vehicle detected by the receiving unit 4a is within the noise suppression area of the map information stored in the map information storage unit 4b (S120).

  On the other hand, when the drive control unit 2a of the ECU 2 receives the off signal from the selection switch 6 and determines that the user has selected the normal mode (No in S110), the process proceeds to (S140) described later.

  When the noise suppression region determination unit 2b determines that the current position of the vehicle is within the noise suppression region (Yes in S120), the drive control unit 2a enters the restriction mode (S130) and suppresses noise as described above. The cooling fan 1 is controlled. For example, as described above, the drive control unit 2a increases the predetermined operating temperature T1 of the cooling fan 1 and performs soft start and PID control (FIG. 2C), thereby suppressing the noise of the cooling fan 1. To do.

  On the other hand, when the noise suppression area determination unit 2b determines that the current position of the vehicle is not within the noise suppression area (No in S120), the process proceeds to (S140) described later.

  In the process of (S140) described above, the drive control unit 2a enters the normal mode and controls the cooling fan 1.

  As described above, in the cooling fan control device according to the first embodiment, when the noise suppression region determination unit 2b of the ECU 2 determines that the current position of the vehicle is within the noise suppression region, the drive control unit 2a The mode is entered and the driving of the cooling fan 1 is limited. Thereby, the noise of the cooling fan 1 can be suppressed in the noise suppression region. Further, since the above effect can be realized without requiring a special control device or the like, the noise of the cooling fan 1 can be reduced with a simple configuration.

(Second Embodiment)
FIG. 4 is a block diagram illustrating an example of a system configuration of a cooling fan control device according to the second embodiment.

  In the cooling fan control device 20 according to the second embodiment, the ECU 22 is in the drive control unit 2a that controls the driving of the cooling fan 1 and the current time is within the noise suppression time zone that suppresses the noise of the cooling fan 1. And a noise suppression time zone determination unit (noise suppression time zone determination means) 22b for determining whether or not. The drive control unit 2a and the noise suppression time zone determination unit 22b are realized, for example, by a program stored in the ROM of the ECU 22 and executed by the CPU.

  A clock device (time detection means) 23 for detecting the current time is connected to the noise suppression time zone determination unit 22b. The current time detected by the clock device 23 is transmitted to the noise suppression time zone determination unit 22b. In addition, as the timepiece device 23, for example, the timepiece device 23 incorporated in the in-vehicle device can be used.

  The noise suppression time zone determination unit 22b determines whether or not the current time detected by the clock device 23 is within the noise suppression time zone. Note that the noise suppression time zone is a time zone during which the user's surroundings normally calm down, such as a night time zone such as a midnight time zone (approximately 22:00 to 3 o'clock) or an early morning time zone (approximately 4 o'clock to 7 o'clock). Point to. Further, the noise suppression time zone is stored in advance in the ROM of the ECU 22, but may be configured to be changed by the user.

  When the noise suppression time zone determination unit 22b determines that the current time is within the noise suppression time zone, the drive control unit 2a enters the restriction mode and restricts the driving of the cooling fan 1.

  In the cooling fan control device 20 according to the second embodiment shown in FIG. 4, the same parts as those in the cooling fan control device 10 according to the first embodiment shown in FIG. Detailed description will be omitted.

  FIG. 5 is a flowchart illustrating an example of a control processing flow of the cooling fan control device 20 according to the second embodiment.

  For example, the drive control unit 2a of the ECU 20 determines whether or not the vehicle speed detected by the vehicle speed sensor 5 is substantially 0 and the vehicle is in a stopped state (S200).

  When the drive control unit 2a of the ECU 20 determines that the vehicle speed detected by the vehicle speed sensor 5 is substantially 0 and the vehicle is in a stopped state (Yes in S200), based on the signal from the selection switch 6, the limit mode is set by the user. It is determined whether or not is selected (S210).

  On the other hand, when the drive control unit 2a of the ECU 20 determines that the vehicle speed detected by the vehicle speed sensor 5 is not 0 and is in a traveling state (No in S200), the process proceeds to the process of (S240) described later.

  When the drive control unit 2a of the ECU 20 receives the ON signal from the selection switch 6 and determines that the user has selected the restriction mode (Yes in S210), the noise suppression time zone determination unit 22b is It is determined whether or not the detected current time is within the noise suppression time zone (S220).

  On the other hand, when the drive control unit 2a of the ECU 20 receives the OFF signal from the selection switch 6 and determines that the user has selected the normal mode (No in S210), the process proceeds to (S240) described later.

  When the noise suppression time zone determination unit 22b determines that the current time is within the noise suppression time zone (Yes in S220), the drive control unit 2a enters the restriction mode (S230) and suppresses noise as described above. The cooling fan 1 is controlled.

  On the other hand, when the noise suppression time zone determination unit 22b determines that the current time is not within the noise suppression time zone (No in S220), the process proceeds to (S240) described later.

  In the process of (S240) described above, the drive control unit 2a enters the normal mode and controls the cooling fan 1.

  As described above, in the cooling fan control device 20 according to the second embodiment, when the noise suppression time zone determination unit 22b of the ECU 22 determines that the current time is within the noise suppression time zone, the drive control unit 2a The restriction mode is entered, and the driving of the cooling fan 1 is restricted. Thereby, the noise of the cooling fan 1 can be suppressed within the noise suppression time zone. Moreover, since the said effect is realizable without requiring a special control apparatus etc., the noise of the cooling fan 1 is reduced with a simple structure.

  As mentioned above, although the best mode for carrying out the present invention has been described using the embodiment, the present invention is not limited to such an embodiment and is within the scope not departing from the gist of the present invention. Various modifications and substitutions can be made to the above-described embodiment.

  The structure which suppresses the noise of a cooling fan by combining the said 1st and 2nd embodiment may be sufficient. For example, the noise suppression region determination unit 2b determines that the current position of the vehicle is within the noise suppression region, and the noise suppression time zone determination unit 22b determines that the current time is within the noise suppression time zone. At this time, the drive control unit 2a may enter a restriction mode and restrict the driving of the cooling fan 1. Thereby, the noise of the cooling fan 1 can be suppressed within the noise suppression region and within the noise suppression time zone.

  In the first and second embodiments, the drive control unit 2a of the ECUs 2 and 22 may be in the limit mode when the battery charge amount is equal to or less than a predetermined amount, and the drive of the cooling fan 1 may be limited. For example, the noise suppression region determination unit 2b determines that the current position of the vehicle is within the noise suppression region, or the noise suppression time zone determination unit 22b determines that the current time is within the noise suppression time zone, Further, the drive control unit 2a may enter a restriction mode and restrict the driving of the cooling fan 1 when it is determined that the storage amount of the battery is equal to or less than a predetermined amount. Thereby, the electric power consumption of a battery can be suppressed, suppressing the noise of the cooling fan 1. FIG.

  The present invention can be used, for example, in a cooling fan control device that controls a cooling fan that cools a radiator of a vehicle engine. The appearance, weight, size, running performance, etc. of the vehicle to be mounted are not limited.

It is a block diagram which shows an example of the system configuration | structure of the cooling fan control apparatus which concerns on the 1st Embodiment of this invention. (A) It is a figure which shows an example of the change of a vehicle speed when the drive control part of ECU becomes a normal mode and a restriction | limiting mode. (B) It is a figure which shows an example of the temperature change of the cooling water of a radiator when the drive control part of ECU becomes a normal mode and a restriction | limiting mode. (C) It is a figure which shows an example of the change of the rotation speed in the electric motor of a cooling fan when the drive control part of ECU becomes a normal mode and a restriction | limiting mode. It is a flowchart which shows an example of the control processing flow of the cooling fan control apparatus which concerns on 1st Embodiment. It is a block diagram which shows an example of the system configuration | structure of the cooling fan control apparatus which concerns on 2nd Embodiment. It is a flowchart which shows an example of the control processing flow of the cooling fan control apparatus which concerns on 2nd Embodiment.

Explanation of symbols

1 Cooling fan 2 ECU
2a Drive control unit 2b Noise suppression region determination unit 3 Temperature sensor 4 Navigation device 4a GPS reception unit 4b Map information storage unit 5 Vehicle speed sensor 6 Selection switch 10 Cooling fan control device 50 Engine

Claims (10)

Temperature detecting means for detecting the temperature of cooling water for cooling the internal combustion engine;
Drive control means for controlling the driving of a cooling fan that sends cooling air to the cooling water of the internal combustion engine so that the temperature of the cooling water detected by the temperature detection means is not more than a predetermined operating temperature;
Position detecting means for detecting the current position of the vehicle;
A cooling fan control device comprising map information storage means for storing map information,
Noise suppression that suppresses noise of the cooling fan based on the current position of the vehicle detected by the position detection means and the map information stored by the map information storage means. A noise suppression area determination means for determining whether or not the area is within the area;
The cooling fan, wherein when the noise suppression area determination means determines that the current position of the vehicle is within the noise suppression area, the drive control means restricts driving of the cooling fan. Control device. The cooling fan control device according to claim 1,
The cooling fan control device, wherein the noise suppression area includes an urban area and a parking lot. The cooling fan control device according to claim 1 or 2,
Time detection means for detecting the current time;
Noise suppression time zone determination means for determining whether or not the current time detected by the time detection means is within a noise suppression time zone for suppressing noise of the cooling fan;
When the noise suppression region determination means determines that the current position of the vehicle is within the noise suppression region, and the noise suppression time zone determination means determines that the current time is within the noise suppression time zone. When judged
The cooling fan control device, wherein the drive control means limits driving of the cooling fan. Temperature detecting means for detecting the temperature of cooling water for cooling the internal combustion engine;
Drive control means for controlling the driving of a cooling fan that sends cooling air to the cooling water of the internal combustion engine so that the temperature of the cooling water detected by the temperature detection means is not more than a predetermined operating temperature;
A cooling fan control device comprising time detection means for detecting the current time,
A noise suppression time zone determination unit that determines whether or not the current time detected by the current time detection unit is within a noise suppression time zone that suppresses noise of the cooling fan;
The cooling fan control, wherein when the noise suppression time zone determination means determines that the current time is within the noise suppression time zone, the drive control means limits the driving of the cooling fan. apparatus. The cooling fan control device according to claim 4,
The cooling fan control device, wherein the noise suppression time zone includes a night time zone and an early morning time zone. The cooling fan control device according to any one of claims 1 to 5,
The cooling fan control device, wherein the drive control means limits the driving of the cooling fan by increasing the predetermined operating temperature. The cooling fan control device according to any one of claims 1 to 6,
The cooling fan control device, wherein the drive control means limits driving of the cooling fan by suppressing an increase rate of the number of rotations of the cooling fan to a predetermined rate or less. The cooling fan control device according to any one of claims 1 to 7,
The apparatus further comprises a selection switch capable of selecting a restriction mode in which driving of the cooling fan is restricted by the drive control means and a normal mode in which driving of the cooling fan is not restricted by the drive control means. Cooling fan control device. The cooling fan control device according to any one of claims 1 to 8,
It further comprises speed detecting means for detecting the speed of the vehicle,
The cooling fan control device, wherein the drive control means limits driving of the cooling fan when the speed of the vehicle detected by the speed detection means is equal to or lower than a predetermined speed. The cooling fan control device according to any one of claims 1 to 9,
A charge amount detecting means for detecting a charge amount of the battery of the vehicle;
The cooling fan control device, wherein the drive control means restricts the driving of the cooling fan when the charged amount of the battery detected by the charged amount detection means becomes a predetermined amount or less.

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