KR101755507B1 - Control apparatus and method for cooling fan of vehicle - Google Patents

Control apparatus and method for cooling fan of vehicle Download PDF

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Publication number
KR101755507B1
KR101755507B1 KR1020150178008A KR20150178008A KR101755507B1 KR 101755507 B1 KR101755507 B1 KR 101755507B1 KR 1020150178008 A KR1020150178008 A KR 1020150178008A KR 20150178008 A KR20150178008 A KR 20150178008A KR 101755507 B1 KR101755507 B1 KR 101755507B1
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South Korea
Prior art keywords
voltage
equal
pressure
thermal fuse
air conditioner
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KR1020150178008A
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Korean (ko)
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KR20170070468A (en
Inventor
이근형
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현대자동차 주식회사
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/14—Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
    • B60H1/08—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant from other radiator than main radiator
    • B60H1/10—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant from other radiator than main radiator the other radiator being situated in a duct capable of being connected to atmosphere outside vehicle
    • B60H1/12—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant from other radiator than main radiator the other radiator being situated in a duct capable of being connected to atmosphere outside vehicle using an air blower
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/026—Thermostatic control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/02—Controlling of coolant flow the coolant being cooling-air
    • F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2031/00—Fail safe
    • F01P2031/36—Failure of coolant pump

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The present invention relates to a cooling fan control apparatus for a vehicle, and more particularly, to a cooling fan control apparatus and method for a vehicle that can detect a disconnection of a thermal fuse installed in a cooling fan.
To this end, an apparatus for controlling a cooling fan for a vehicle according to an embodiment of the present invention includes a fan motor for driving the blade, a resistor for adjusting the speed of the fan motor, a cooling fan including a thermal fuse blown according to the temperature of the resistor, A fan for supplying a voltage to the cooling fan, a high speed relay connected to the fan motor, a low speed relay connected to the fan motor through the resistor, and a control signal for controlling the cooling fan, And a controller for determining whether the thermal fuse is disconnected according to at least one of a battery voltage, an air conditioner coolant pressure, and a coolant temperature.

Figure R1020150178008

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooling fan,

The present invention relates to a cooling fan control apparatus for a vehicle, and more particularly, to a cooling fan control apparatus and method for a vehicle that can detect a disconnection of a thermal fuse installed in a cooling fan.

Generally, a vehicle generates a lot of heat in the engine. If the temperature rises above a certain temperature, there is a danger of explosion. Therefore, the temperature is lowered by circulating cooling water around the engine for cooling. The heated cooling water generates heat from the radiator, and a cooling fan is installed in the engine room of the vehicle to enhance the radiating effect of the radiator.

Such a cooling fan keeps the temperature of the cooling water at an appropriate condition, thereby preventing the engine from overheating and optimizing the performance of the engine. The cooling fan is mainly driven by a motor.

In winter, the cooling fan generally does not work, but when the driver presses the defrost button due to mist or frost removal, the air conditioner will operate and the air conditioner pressure will rise slightly. When the air conditioner pressure is above a certain level, it reaches the area where the cooling fan should operate, but the cooling fan does not operate due to the motor constraint due to the cooling fan icing.

When the fan motor is restrained by freezing or the like in winter, the consumption current of the fan motor increases sharply, thereby causing the resistor to generate abnormal heat. Thus, the thermal fuse is disconnected by the resistor heating.

A cooling fan with a thermal fuse blown always operates only in a high speed mode, which causes a problem that the noise of the cooling fan is increased because the vehicle consumes a large amount of current in the battery and the fuel efficiency deteriorates and operates in a high speed mode. In addition, when operating in a high-speed mode immediately without a low-speed mode, a constraint of the cool motor is generated. As a result, a fire due to motor burnout is also possible.

The matters described in the background section are intended to enhance the understanding of the background of the invention and may include matters not previously known to those skilled in the art.

An embodiment of the present invention provides an apparatus and method for controlling a cooling fan for a vehicle that can detect a disconnection of a thermal fuse installed in a cooling fan.

In addition, embodiments of the present invention provide an apparatus and method for controlling a cooling fan for a vehicle that can detect a failure of the cooling fan by disconnection of a thermal fuse.

According to an embodiment of the present invention, there is provided a cooling fan including a fan motor for driving the blade, a resistor for adjusting the speed of the fan motor, and a thermal fuse blown according to the temperature of the resistor. A battery for supplying a voltage to the cooling fan; A high-speed relay connected to the fan motor; A low speed relay connected to the fan motor through the resistor; And a controller for generating a control signal for controlling the cooling fan to transmit the control signal to the high-speed relay or the low-speed relay, and determining whether the thermal fuse is disconnected according to at least one of a battery voltage, It is possible to provide a cooling fan control device.

According to another embodiment of the present invention, there is provided a method of controlling a cooling fan, the method comprising: generating a low-speed control signal and a high-speed control signal for controlling a cooling fan; And when the low-speed relay is turned on by the low-speed control signal, it is checked whether the fluctuation voltage of the battery voltage is equal to or lower than the first set voltage, and if the fluctuation voltage is equal to or lower than the first set voltage, A first step of determining whether or not the circuit is disconnected; When the high-speed relay is turned on by the high-speed control signal, it is determined whether the fluctuation voltage of the battery voltage is equal to or higher than the second set voltage. If the fluctuation voltage is equal to or higher than the second set voltage, A second step of determining whether or not the circuit is disconnected; And determining that the thermal fuse is disconnected if the thermal fuse is determined to be a disconnection in the primary determination and the secondary determination.

The embodiment of the present invention can detect the disconnection of the thermal fuse, so that it is possible to prevent the fire due to the motor burnout.

Further, the fuel consumption can be improved, and it is possible to prevent the driver from being inconvenienced by the noise of the cooling fan.

In addition, effects obtainable or predicted by the embodiments of the present invention will be directly or implicitly disclosed in the detailed description of the embodiments of the present invention. That is, various effects to be predicted according to the embodiment of the present invention will be disclosed in the detailed description to be described later.

1 is a block diagram of a cooling fan control apparatus for a vehicle according to an embodiment of the present invention.
2 is a flowchart illustrating a method of controlling a cooling fan for a vehicle according to an embodiment of the present invention.
3 is a flowchart illustrating a method of first determining whether a thermal fuse is blown out of a cooling fan control method for a vehicle according to an exemplary embodiment of the present invention.
FIG. 4 is a flowchart illustrating a method for determining whether a thermal fuse is disconnected in a second order in a method for controlling a cooling fan for a vehicle according to an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an operation principle of an embodiment of a vehicle cooling fan control apparatus and method according to the present invention will be described in detail with reference to the accompanying drawings and description. It should be understood, however, that the drawings and the following detailed description are exemplary and explanatory of various embodiments for effectively illustrating the features of the present invention. Therefore, the present invention should not be limited to the following drawings and descriptions.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The terms used below are defined in consideration of the functions of the present invention, which may vary depending on the user, intention or custom of the operator. Therefore, the definition should be based on the contents throughout the present invention.

In order to efficiently explain the essential technical features of the present invention, the following embodiments will appropriately modify, integrate, or separate terms to be understood by those skilled in the art to which the present invention belongs , And the present invention is by no means thereby limited.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a cooling fan control apparatus for a vehicle according to an embodiment of the present invention.

1, a cooling fan control apparatus 50 for a vehicle according to an embodiment of the present invention includes a state meter 100, a controller 110, a battery 120, a high speed relay 130, a low speed relay 135, And a cooling fan (140).

The state meter 100 measures the state of the vehicle required to control the cooling fan 140. [ To this end, the state meter 100 includes a pressure measuring unit 103 and a temperature measuring unit 105.

The pressure measuring unit 103 measures the pressure of the air conditioner refrigerant and provides the measured pressure to the controller 110.

The temperature measuring unit 105 measures the temperature of the cooling water and provides the measured cooling water temperature to the controller 110. [

The controller 110 controls the status meter 100, the battery 120, the high speed relay 130, the low speed relay 135 and the cooling fan 140 to control the operation of the cooling fan 140. Specifically, the controller 110 drives the cooling fan 140 at a low speed or at a high speed based on the air conditioner refrigerant pressure, the cooling water temperature, and the vehicle speed measured by the status meter 100.

The controller 110 generates a high-speed control signal for driving the cooling fan 140 at a high speed and provides a high-speed control signal to the high-speed relay 130. The controller 110 generates a low-speed control signal for driving the cooling fan 140 at a low speed and provides the low-speed control signal to the low-speed relay 135.

The controller 110 confirms at least one of the battery voltage, the air conditioner coolant pressure, and the coolant temperature to check whether the thermal fuse 155 is disconnected, and determines whether the thermal fuse 155 is disconnected based on at least one of the battery voltage, It is determined whether or not the wire 155 is disconnected.

For this purpose, the controller 110 may be implemented with one or more processors operating according to a set program, and the set program may be one programmed to perform each step of the vehicle cooling fan control method according to an embodiment of the present invention have.

A method of controlling the cooling fan 140 in the controller 110 will be described in more detail with reference to FIGS. 2 to 4. FIG.

The battery 120 provides a voltage to the cooling fan 140. The battery 120 may be connected to the high speed relay 130 and the low speed relay 135 to provide a voltage to the cooling fan 140 through the high speed relay 130 and the low speed relay 135.

The high-speed relay 130 is directly connected to the fan motor 157. The high speed relay 130 is turned on in accordance with the control of the controller 110 to supply the voltage supplied from the battery 120 to the fan motor 157 of the cooling fan 140. That is, when the high-speed relay 130 receives the high-speed control signal from the controller 110, the high-speed relay 130 is turned on to supply the voltage of the battery 120 to the fan motor 157.

The low speed relay 135 is connected to the fan motor 157 through a resistor 153. [ The low speed relay 135 is turned on in accordance with the control of the controller 110 to supply the voltage supplied from the battery 120 to the register 153 of the cooling fan 140. That is, when the low-speed relay 135 receives the low-speed control signal from the controller 110, the low-speed relay 135 turns on and supplies the voltage of the battery 120 to the register 153. [

The cooling fan 140 includes a resistor 153, a thermal fuse 155, a fan motor 157, and a blade 159.

The register 153 regulates the speed of the fan motor 157. That is, as the resistance value of the resistor 153 becomes larger, the speed of the fan motor 157 is driven at a lower speed.

The thermal fuse 155 is connected to the resistor 153. The thermal fuse 155 is broken according to the temperature of the resistor 153. That is, the thermal fuse 155 cuts off the voltage applied to the fan motor 157 when the temperature of the resistor 153 rises above the reference temperature.

The blade 159 is rotated by the fan motor 157. That is, the cooling fan 140 can rotate the blade 159 to maintain the temperature of the cooling water at an appropriate temperature, thereby preventing the engine from overheating.

Hereinafter, a method of controlling the cooling fan 140 in the vehicle will be described with reference to FIGS. 2 to 4. FIG.

2 is a flowchart illustrating a method of controlling a cooling fan for a vehicle according to an embodiment of the present invention.

Referring to FIG. 2, the controller 110 generates a control signal for controlling the cooling fan 140 (S210). That is, the controller 110 generates a low-speed control signal for controlling the cooling fan 140 at a low speed or a high-speed control signal for controlling the cooling fan 140 at a high speed.

The controller 110 provides a low-speed control signal to the low-speed relay 135 to turn on the low-speed relay 135 (S220). The low speed relay 135 provides the voltage supplied from the battery 120 to the register 153 of the cooling fan 140 when the low speed relay 135 is turned on under the control of the controller 110. [

The controller 110 first determines whether the thermal fuse 155 is disconnected according to at least one of the battery voltage, the refrigerant pressure of the air conditioner, and the coolant temperature when the low-speed relay 135 is turned on (S230). A method of first determining whether the thermal fuse 155 is disconnected will be described in more detail with reference to FIG.

The controller 110 provides a high-speed control signal to the high-speed relay 130 to turn on the high-speed relay 130 (S240). At this time, the high-speed relay 130 provides the voltage supplied from the battery 120 to the fan motor 157 when the high-speed relay 130 is turned on under the control of the controller 110. [

When the high-speed relay 130 is turned on, the controller 110 determines whether the thermal fuse 155 is open or closed according to at least one of a battery voltage, an air-conditioner coolant pressure, and a coolant temperature. A method for determining whether the thermal fuse 155 is disconnected in a second order will be described in more detail with reference to FIG.

The controller 110 confirms disconnection of the thermal fuse 155 (S260). That is, when the controller 110 determines that the thermal fuse 155 is disconnected as a result of the determination in step S230 and the thermal fuse 155 is disconnected as a result of the determination in step S250, the controller 110 finally checks whether the thermal fuse 155 is disconnected .

The controller 110 outputs the warning information through the speaker or the display device (S270). That is, the controller 110 generates warning information for notifying the driver that the thermal fuse 155 is disconnected and the resistor 153 is not operating normally, outputs the generated warning information through the speaker by voice, . ≪ / RTI > Here, the display device can display warning information, and the type is irrelevant. For example, the display device may be a cluster, AVN (Audio Video Navigation).

3 is a flowchart illustrating a method of first determining whether a thermal fuse is blown out of a cooling fan control method for a vehicle according to an exemplary embodiment of the present invention.

Referring to FIG. 3, when the low-speed relay 135 is turned on, the controller 110 confirms the fluctuation voltage of the battery voltage (S310). That is, the controller 110 monitors the battery voltage when the low-speed relay 135 is turned on by the low-speed control signal, and checks the fluctuation voltage in which the battery voltage fluctuates when the battery voltage falls. Such a fluctuating voltage may indicate a difference between a voltage at a point before the voltage falls and a voltage at the point when the voltage falls.

The controller 110 confirms whether the fluctuation voltage is equal to or less than the first set voltage (S320). At this time, the first set voltage may indicate a reference voltage for confirming disconnection of the thermal fuse 155. For example, the first set voltage may be 0.2V.

The controller 110 determines whether the air conditioner is on if the variable voltage is equal to or lower than the first set voltage (S330). At this time, the controller 110 can confirm whether the air conditioner is turned on through the air conditioner switch.

When the air conditioner is on, the controller 110 checks the rising pressure of the air conditioner refrigerant pressure (S340). That is, when the air conditioner is on, the controller 110 confirms the rising pressure of the air conditioner refrigerant pressure during the measuring time. The reason for ascertaining the rising pressure is to check whether the air conditioner refrigerant pressure has continuously increased and confirm the disconnection of the thermal fuse 155.

The controller 110 determines whether the rising pressure is equal to or higher than the set pressure (S350). Here, the set pressure may indicate a set pressure to confirm disconnection of the thermal fuse 155.

If the rising pressure is equal to or higher than the set pressure, the controller 110 firstly checks the disconnection of the thermal fuse 155 (S360).

The controller 110 confirms the rising temperature of the cooling water when the air conditioner is off (S370). That is, when the air conditioner is off, the controller 110 confirms the rising temperature at which the cooling water temperature has risen during the measurement time. The reason for ascertaining the rising temperature is to judge whether the cooling water temperature has continuously increased to check the disconnection of the thermal fuse 155. Here, the measurement time may be a predetermined value as a time for confirming whether the cooling water temperature has continuously increased.

The controller 110 determines whether the rising temperature is equal to or higher than the set temperature (S380). Here, the set temperature may indicate the temperature set for confirming the disconnection of the thermal fuse 155.

The controller 110 can first confirm the disconnection of the thermal fuse 155 if the rising temperature is equal to or higher than the set temperature.

On the other hand, the controller 110 controls the cooling fan 140 when the variable voltage exceeds the first set voltage in step S320, the rising pressure is lower than the set temperature in step S350, or the rising temperature is lower than the set temperature in step S380 S390). That is, the controller 110 controls the cooling fan 140 based on the vehicle speed, the air conditioner coolant pressure, and the coolant temperature since the thermal fuse 155 is not broken.

FIG. 4 is a flowchart illustrating a method for determining whether a thermal fuse is disconnected in a second order in a method for controlling a cooling fan for a vehicle according to an exemplary embodiment of the present invention.

Referring to FIG. 4, when the high-speed relay 130 is turned on, the controller 110 confirms the fluctuation voltage of the battery voltage (S410). In other words, the controller 110 monitors the battery voltage when the high-speed relay 130 is turned on by the high-speed control signal, and confirms the fluctuating voltage when the battery voltage falls.

The controller 110 confirms whether the fluctuation voltage is equal to or higher than the second set voltage (S420). At this time, the second set voltage may indicate a reference voltage for confirming disconnection of the thermal fuse 155, and may be different from the first set voltage. For example, the second set voltage may be 0.5V.

The controller 110 normally controls the cooling fan 140 if the variation voltage is lower than the second set voltage (S430). That is, if the variable voltage is lower than the second set voltage, the controller 110 controls the cooling fan 140 based on the vehicle speed, the air conditioner coolant pressure, and the coolant temperature since the thermal fuse 155 is not disconnected

If the variable voltage is equal to or higher than the second set voltage, the controller 110 determines whether the air conditioner is on (S440). That is, if the variable voltage is equal to or higher than the second set voltage, the controller 110 can confirm whether the air conditioner is on based on the air conditioner switch.

When the air conditioner is on, the controller 110 confirms the rising pressure of the air conditioner refrigerant pressure (S450). In other words, when the air conditioner is on, the controller 110 confirms the rising pressure of the air conditioner refrigerant pressure during the measuring time to check whether the air conditioner refrigerant pressure continuously increases.

The controller 110 confirms whether the rising pressure is equal to or higher than the set pressure (S460).

The controller 110 determines that the state of the fan motor 157 is restricted if the rising pressure is equal to or higher than the set pressure (S470). If the rising pressure is equal to or higher than the set pressure or the rising temperature is equal to or higher than the set temperature, the fan motor 157 is judged as restrained because power is normally supplied to the fan motor 157 if the battery voltage fluctuation is large. If the refrigerant pressure continuously increases, it can be confirmed that the fan motor 157 is in a restricted state in which it can not operate.

If the rising pressure is lower than the set pressure, the controller 110 firstly checks the disconnection of the thermal fuse 155 (S480).

The controller 110 confirms the rising temperature of the cooling water when the air conditioner is off (S490). That is, when the air conditioner is off, the controller 110 confirms the rising temperature of the cooling water during the measurement time to check whether the cooling water temperature continuously rises.

The controller 110 confirms whether the rising temperature is equal to or higher than the set temperature (S500).

If the rising temperature is higher than the set temperature, the controller 110 proceeds to step S470 and determines the state of the fan motor 157 as constraint.

On the other hand, if the rising temperature is lower than the set temperature, the controller 110 may go to step S480 and check the disconnection of the thermal fuse 155 by the second order.

As described above, the vehicle cooling fan control apparatus 50 according to the present invention can confirm the disconnection of the thermal fuse 155 based on at least one of the battery voltage, the cooling water temperature, and the air conditioner refrigerant pressure. It is possible to prevent the fan motor 157 from being driven at a low speed due to disconnection, thereby improving the fuel consumption and preventing the fan motor 157 from burning down.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

50: Cooling fan control device for vehicle.
100: State meter
110:
120: Battery
130: High speed relay
135: Low speed relay
140: Cooling fan
153: Register
155: Thermal fuse
157: Fan motor
159: The blade

Claims (15)

A cooling fan including a fan motor for driving the blade, a resistor for adjusting the speed of the fan motor, and a thermal fuse blown according to the temperature of the resistor;
A battery for supplying a voltage to the cooling fan;
A high-speed relay connected to the fan motor;
A low speed relay connected to the fan motor through the resistor; And
And a controller for generating a control signal for controlling the cooling fan to transmit the control signal to the high-speed relay or the low-speed relay, and determining whether the thermal fuse is blown according to at least one of a battery voltage,
The controller
Speed relay control signal is transmitted to the low-speed relay, and it is determined whether the fluctuation voltage of the battery voltage is equal to or lower than the first set voltage. If the variable-voltage is equal to or lower than the first set voltage, And confirms whether the pressure is equal to or higher than a set pressure, and if the rising pressure is equal to or higher than a set pressure, disconnection of the thermal fuse is confirmed. delete The method according to claim 1,
The controller
Speed relay control signal to the low-speed relay to check whether the fluctuation voltage of the battery voltage is equal to or lower than the first set voltage, and when the fluctuation voltage is equal to or lower than the first set voltage, And if the rising temperature is equal to or higher than the set temperature, it confirms the disconnection of the thermal fuse. The method according to claim 1,
The controller
Wherein the high-speed control signal is transmitted to the high-speed relay, and it is confirmed whether the fluctuation voltage of the battery voltage is equal to or higher than the second set voltage. If the air conditioner is on when the fluctuation voltage is equal to or higher than the second set voltage, Checking whether the pressure is equal to or lower than the set pressure, and checking whether the thermal fuse is blown when the rising pressure is equal to or lower than the set pressure. The method according to claim 1,
The controller
And a high-speed control signal is transmitted to the high-speed relay to check whether the fluctuation voltage of the battery voltage is equal to or higher than the second set voltage, and when the variable voltage is equal to or higher than the second set voltage, And if the rising temperature is equal to or lower than the set temperature, it confirms the disconnection of the thermal fuse. The method according to claim 1,
The controller
A high speed control signal is transmitted to the high speed relay, and at least one of an air conditioner coolant pressure and a coolant temperature is checked if the fluctuation voltage of the battery voltage is equal to or higher than a second set voltage, And determines whether or not the vehicle is restricted. The method according to claim 6,
The controller
If the air conditioner is in a state where the fluctuation voltage of the battery voltage is equal to or higher than the second set voltage, it is determined whether the rising pressure of the air conditioner refrigerant pressure during the measurement time is equal to or higher than a set pressure, And a control unit for controlling the cooling fan. The method according to claim 6,
The controller
Wherein the control unit determines whether the cooling water temperature is higher than a predetermined temperature when the variable voltage of the battery voltage is equal to or higher than the second predetermined voltage and determines that the fan motor is restricted if the cooling water temperature is equal to or higher than the predetermined temperature. Generating a low-speed control signal and a high-speed control signal for controlling the cooling fan;
And when the low-speed relay is turned on by the low-speed control signal, it is checked whether the fluctuation voltage of the battery voltage is equal to or lower than the first set voltage, and if the fluctuation voltage is equal to or lower than the first set voltage, A first step of determining whether or not the circuit is disconnected;
When the high-speed relay is turned on by the high-speed control signal, it is determined whether the fluctuation voltage of the battery voltage is equal to or higher than the second set voltage. If the fluctuation voltage is equal to or higher than the second set voltage, A second step of determining whether or not the circuit is disconnected; And
Determining that the thermal fuse is disconnected if the thermal fuse is identified as a disconnection in the primary determination and the secondary determination;
And a control unit for controlling the cooling fan. 10. The method of claim 9,
The step of firstly determining whether the thermal fuse is disconnected
Confirming whether the fluctuation voltage of the battery voltage is lower than a first set voltage when the low speed relay is turned on by the low speed control signal;
Confirming whether the air conditioner is on or off when the variation voltage is equal to or lower than the first set voltage;
If the air conditioner is on, checking whether the rising pressure of the air conditioner refrigerant pressure is higher than the set pressure during the measuring time; And
Confirming disconnection of the thermal fuse if the rising pressure is equal to or higher than a set pressure;
And a control unit for controlling the cooling fan. 10. The method of claim 9,
The step of firstly determining whether the thermal fuse is disconnected
Confirming whether the fluctuation voltage of the battery voltage is lower than a first set voltage when the low speed relay is turned on by the low speed control signal;
Confirming whether the air conditioner is on or off when the variation voltage is equal to or lower than the first set voltage;
If the air conditioner is off, checking whether the rising temperature of the cooling water is higher than a predetermined temperature during the measurement time; And
Confirming disconnection of the thermal fuse if the rising temperature is higher than the set temperature;
And a control unit for controlling the cooling fan. 10. The method of claim 9,
The step of secondarily determining whether the thermal fuse is disconnected
Confirming whether the variation voltage of the battery voltage is equal to or higher than a second set voltage when the high-speed relay is turned on by the high-speed control signal;
Confirming whether the air conditioner is on or off if the variable voltage is equal to or higher than a second set voltage;
If the air conditioner is on, checking whether the rising pressure of the air conditioner refrigerant pressure is lower than the set pressure during the measurement time; And
Confirming disconnection of the thermal fuse if the rising pressure is lower than the set pressure;
And a control unit for controlling the cooling fan. 13. The method of claim 12,
If the air conditioner is on, it is checked whether the rising pressure of the air conditioner refrigerant pressure is lower than the set pressure during the measuring time period
And determining that the fan motor is in a restricted state if the rising pressure is equal to or higher than a set pressure. 10. The method of claim 9,
The step of secondarily determining whether the thermal fuse is disconnected
Confirming whether the variation voltage of the battery voltage is equal to or higher than a second set voltage when the high-speed relay is turned on by the high-speed control signal;
Confirming whether the air conditioner is on or off if the variable voltage is equal to or higher than a second set voltage;
Determining whether the rising temperature of the cooling water is lower than a predetermined temperature during the measurement time if the air conditioner is off; And
Confirming disconnection of the thermal fuse if the rising temperature is lower than a set temperature;
And a control unit for controlling the cooling fan. 15. The method of claim 14,
If the air conditioner is off, it is checked whether the rising temperature of the cooling water is lower than the set temperature during the measurement time
And determining that the fan motor is in restraint if the rising temperature is equal to or higher than the set temperature.
KR1020150178008A 2015-12-14 2015-12-14 Control apparatus and method for cooling fan of vehicle KR101755507B1 (en)

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