KR19990057236A - Radiator motor control method of cooling system - Google Patents

Abstract

The present invention relates to a radiator motor control method of a cooling apparatus, and an object of the present invention is to cool the cooling system more efficiently by changing the operation of the radiator fan in accordance with the change in the engine cooling water temperature to ensure cooling performance and reduce battery discharge at the same time. The present invention provides a method of controlling a radiator motor of a cooling device.

The present invention for achieving the above object is the step of measuring the cooling water temperature (S10), and comparing the measured cooling water temperature with a plurality of reference values (S20) (S30) (S40), according to the compared reference value In step S60, S70, S80, and S50 of setting a duty ratio for operating the motor, and supplying power to the motor according to the set duty ratio (S90) to efficiently respond to changes in the cooling water temperature. By operating the motor of the radiator there is an advantage that the efficient cooling performance can be secured.

Description

Radiator motor control method of cooling system

The present invention relates to a radiator motor control method of a cooling apparatus, and more particularly, by cooling the radiator fan more efficiently by changing the operation of the radiator fan in accordance with the change of engine cooling water temperature to ensure cooling performance and at the same time reduce the discharge of the battery. It relates to a radiator motor control method of the cooling device.

An automobile cooling device is a device that cools an engine to prevent overheating and to maintain a proper temperature.

The temperature of the combustion gas in the cylinder reaches 2,000 ° C or higher, and a significant amount of this heat is conducted to the cylinders, cylinder heads, pistons, valves and the like. Excessively high temperatures in these parts reduce the strength of the part material, resulting in failure or shortening of life, and worsening of combustion, leading to knocking and premature ignition, resulting in lower engine output.

In addition, in the incomplete cooling state, failures such as abnormal lubrication and seizure may occur due to deterioration of lubrication function such as breaking of the oil film on the cylinder wall and deterioration of oil.

On the contrary, since excessive cooling causes a large amount of heat lost from the cooling, the heat efficiency of the engine is lowered and fuel consumption is increased. Therefore, it is a function of the cooling device to maintain the engine temperature properly.

The engine cooling system includes an air-cooling type in which the engine is directly cooled by external air, and a water cooling type in which cooling water is circulated to cool the engine.

Water-cooled chillers have natural circulation and forced circulation depending on the water circulation. Forced circulation allows the cooling water to circulate in the water jackets provided in the cylinder block and cylinder head to cool. It consists of a thermostat etc.

The radiator is a device for cooling the cooling water heated in the engine, has a large heat dissipation area, and is a kind of tank that receives a large amount of water. And a radiator fan is installed to promote heat dissipation.

FIG. 1 is a block diagram showing a device for controlling a radiator motor of a general cooling device. As shown in FIG. 1, an air conditioner switch 20 for operating an air conditioner and a cooling water temperature sensor 30 for measuring a water temperature of cooling water are shown. And a relay switch 40 for controlling the power supplied to the radiator motor 50, a state of the air conditioner switch 20, and a value of the coolant temperature sensor 30 to control the operation of the relay switch 40. It consists of a control unit 10. In addition, a fan 55 is installed in the radiator motor 50.

Radiator motor control method of the general cooling device made as described above is to continue to cool the radiator by operating the radiator motor 50 to turn the fan 55 when the air conditioner switch 20 is turned on to operate the air conditioner. In addition, when the coolant temperature is greater than the reference set value in the control unit 10 that receives the coolant temperature value by the coolant temperature sensor 30, the relay switch 40 is operated to supply power to the radiator motor 50 so as to supply the motor 50. Activate Then, the fan 55 connected to the motor 50 rotates to cool the radiator.

However, in the control method as described above, even when the air conditioner is operated, there is a case where the cooling water temperature does not exceed the set value.

As another problem, since the reference values compared by the cooling water temperature sensor are single, proper cooling against changes in the cooling water temperature cannot be achieved. That is, when the reference value is set high, there is a problem that the radiator motor 50 does not operate when the reference value is less than the reference value, and may overheat. Also, when the reference value is set low, it may be overcooled. In addition, when the coolant temperature is significantly higher than the reference value, there is a problem in that the operation of the radiator motor 50 operated at a constant speed is insufficient to cool the coolant.

The present invention has been made to solve the above problems, an object of the present invention is to provide a radiator motor control method of the cooling apparatus for controlling the operation of the radiator motor to efficiently respond to the change in the cooling water temperature of the operating speed of the radiator motor In providing.

1 is a block diagram showing an apparatus for controlling a radiator motor of a general cooling apparatus.

2 is a block diagram showing an apparatus for controlling a radiator motor of a cooling apparatus according to the present invention.

3 is a flowchart showing a step by step operation method according to the radiator motor control method of the cooling apparatus according to the present invention.

Figure 4 is a graph showing the set value of the duty ratio for the radiator motor control of the cooling apparatus according to the present invention.

-Explanation of symbols for the main parts of the drawings-

10: control unit 20: air conditioner switch

30: cooling water temperature sensor 40: relay switch

50: radiator motor

The present invention for realizing the above object comprises the steps of measuring the cooling water temperature, comparing the measured cooling water temperature with a plurality of reference values, setting a duty ratio for the motor operation according to the compared reference value, The step of supplying power to the motor in accordance with the set duty ratio.

Referring to the operation of the present invention made as described above are as follows.

The cooling water temperature is measured and the measured cooling water temperature is compared with a plurality of reference values. As a result of comparison, when the temperature is lower than the standard value, the motor operation is stopped to prevent overcooling, and the duty ratio corresponding to each reference value is set to operate the motor according to the set duty ratio. It works.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the present embodiment is not intended to limit the scope of the present invention, but is presented by way of example only and the same parts as in the conventional configuration using the same reference numerals and names.

FIG. 2 is a block diagram showing a device for controlling a radiator motor of a cooling apparatus according to the present invention. As shown in FIG. 2, a cooling water temperature sensor 30 and a radiator motor 50 for measuring a cooling water temperature are shown in FIG. Relay switch 40 for intermitting the supplied power, and the controller 10 for controlling the operation of the relay switch 40 in accordance with the determined duty ratio received the value of the cooling water temperature sensor 30. In addition, a fan 55 is installed in the radiator motor 50.

When explaining the radiator motor control method of the cooling apparatus of the present invention for controlling the configuration made as described above with reference to Figure 3 showing a flowchart according to the operating sequence as follows.

First, the engine cooling water temperature is measured by the cooling water temperature sensor 30 (S10). And the measured cooling water temperature is compared with the first reference value (S20). As a result of comparison, when the coolant temperature is lower than the first reference value, the duty ratio is set to 0 and returned to the operation step S90 of the relay switch (S20). Then, since the duty ratio is set to 0, the power supplied to the motor 50 is cut off to prevent cooling by force, thereby preventing overcooling.

However, if the measured cooling water temperature is higher than the first reference value is compared with the second reference value again (S30). At this time, when the cooling water temperature is lower than the second reference value, that is, higher than the first reference value and lower than the second reference value, the first duty ratio is set and the relay switch is operated to step S90 (S70). However, when the cooling water temperature is higher than the second reference value, it is compared with the third reference value again (S40). If the cooling water temperature is lower than the third reference value, that is, higher than the second reference value and lower than the third reference value, the second duty ratio is set and the relay switch 40 is operated (S90). . When the measured coolant temperature is higher than the third reference value, the third duty ratio is set and the relay switch 40 is returned to operation S90 (S50).

Then, the power supply to the motor 50 is interrupted according to the duty ratio set above, and the cooling water temperature is measured (S10).

In order to show the change in the duty ratio set above, the change in the duty ratio according to the cooling water temperature is shown as a graph in FIG. 4.

As shown in FIG. 4, when the cooling water temperature is the first reference value, the duty ratio is set to 0 so that the relay switch 40 is not operated. When the cooling water temperature is larger than the first reference value and smaller than the second reference value, The duty ratio is set by the slope, and when it is larger than the second reference value and smaller than the third reference value, the duty ratio is set by the slope of K2. If it is larger than the third reference value, the duty ratio is set by the slope of K3 to control the radiator to be cooled by the strongest rotation.

As described above, the present invention can improve cooling performance by controlling the radiator motor more efficiently by controlling the duty ratio variable according to the duty ratio which is variable according to the operating speed of the radiator motor as the cooling water temperature changes. It is advantageous to reduce the discharge of the battery by excluding the operation of the radiator motor in unnecessary parts.

In addition, since the radiator motor is variably operated according to the coolant temperature, there is an advantage that the operation noise of the radiator fan can be minimized.

Claims (2)

Measuring the cooling water temperature (S10); Comparing the cooling water temperature measured in the step (S10) of measuring the cooling water temperature with a plurality of reference values (S20) (S30) (S40), Setting duty ratios for operating the motor according to the plurality of reference values (S60), S70, S80, and S90; Supplying power to the motor according to the set duty ratio (S90) Radiator motor control method of the cooling device characterized in that consisting of. The radiator motor control method according to claim 1, wherein the duty ratio is set by varying inclination at the plurality of reference values.