KR100589140B1 - method for controlling cooling system in automobile - Google Patents

method for controlling cooling system in automobile Download PDF

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Publication number
KR100589140B1
KR100589140B1 KR1020030065368A KR20030065368A KR100589140B1 KR 100589140 B1 KR100589140 B1 KR 100589140B1 KR 1020030065368 A KR1020030065368 A KR 1020030065368A KR 20030065368 A KR20030065368 A KR 20030065368A KR 100589140 B1 KR100589140 B1 KR 100589140B1
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South Korea
Prior art keywords
temperature
engine
cooling
controlling
cooling water
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KR1020030065368A
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Korean (ko)
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KR20050029056A (en
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이세용
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현대자동차주식회사
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Priority to KR1020030065368A priority Critical patent/KR100589140B1/en
Priority to JP2003420225A priority patent/JP2005090480A/en
Priority to DE10359581A priority patent/DE10359581B4/en
Priority to CNB2003101230750A priority patent/CN100513753C/en
Priority to US10/749,236 priority patent/US20050061263A1/en
Publication of KR20050029056A publication Critical patent/KR20050029056A/en
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Publication of KR100589140B1 publication Critical patent/KR100589140B1/en

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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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by 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
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/167—Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • 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
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P2007/146—Controlling of coolant flow the coolant being liquid using valves
    • 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
    • F01P2023/00—Signal processing; Details thereof
    • 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
    • F01P2025/00—Measuring
    • F01P2025/08—Temperature
    • F01P2025/32—Engine outcoming fluid temperature
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/62—Load
    • 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
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/64—Number of revolutions
    • 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
    • F01P2060/00—Cooling circuits using auxiliaries
    • F01P2060/08—Cabin heater
    • 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
    • F01P7/048—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio using electrical drives

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Air-Conditioning For Vehicles (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Control Of Temperature (AREA)

Abstract

본 발명은 차량의 냉각시스템 제어방법에 관한 것으로, 엔진의 스로틀 포지션과 엔진 회전수에 의해 운전 부하를 판단하고, 상기 운전 부하에 따라 설정온도를 결정하는 설정온도 결정하며, 상기 결정된 설정온도와 엔진의 온도를 비교하여 밸브수단의 밸브 개폐량을 제어하여 순환하는 냉각수량을 조절하도록 구성되어 있다.The present invention relates to a control method of a cooling system of a vehicle. The present invention relates to a method for controlling a cooling system of a vehicle. It is configured to adjust the amount of cooling water circulated by controlling the valve opening and closing amount of the valve means by comparing the temperature of the.

이와 같이 본 발명은, 엔진의 운전 부하조건과 온도에 따라 냉각수량을 세밀하게 조절함으로써, 엔진의 부하조건에 따라 냉각 수온을 최적으로 제어하고 열충격 및 냉각상태 감지의 불안정성을 방지할 수 있다.As described above, the present invention can finely control the amount of cooling water according to the operating load condition and the temperature of the engine, thereby optimally controlling the cooling water temperature according to the load condition of the engine and preventing instability of thermal shock and cooling state detection.

Description

차량의 냉각시스템 제어방법 {method for controlling cooling system in automobile} {Method for controlling cooling system in automobile}

도 1은 일반적인 차량 냉각시스템의 개략도,1 is a schematic diagram of a typical vehicle cooling system,

도 2는 본 발명의 바람직한 실시예에 따른 차량 냉각시스템의 개략도,2 is a schematic diagram of a vehicle cooling system according to a preferred embodiment of the present invention;

도 3은 도 2에 도시된 제어부의 동작과정을 설명하기 위한 플로우챠트.FIG. 3 is a flowchart for describing an operation process of the controller illustrated in FIG. 2.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1: 워터 펌프 2: 엔진1: water pump 2: engine

3: 히터 4: 라디에이터3: heater 4: radiator

5: 냉각팬 수단 6: 아울렛 온도 게이지5: cooling fan means 6: outlet temperature gauge

10: 밸브 11: 모터10: valve 11: motor

12: 모터구동부 20: 제어부12: motor drive unit 20: control unit

본 발명은 차량의 냉각시스템 제어방법에 관한 것으로, 보다 상세하게는 냉각수온을 최적으로 제어함과 더불어 냉각계 열충격을 방지할 수 있는 차량의 냉각시스템 제어방법에 관한 것이다.The present invention relates to a method for controlling a cooling system of a vehicle, and more particularly, to a method for controlling a cooling system of a vehicle capable of optimally controlling cooling water temperature and preventing cooling system thermal shock.

일반적으로, 차량용 수냉식 냉각 시스템은, 도 1에 도시된 바와 같으며, 엔진의 냉각수가 워터 펌프(1)에서 압출되어 엔진(2)의 실린더블록과 실린더헤드를 순차적으로 거치면서 엔진의 열을 흡수하고, 실린더헤드의 출구를 통해 배출되어 히터(3) 또는 라디에이터(4)를 거치면서 열을 방출한 뒤, 다시 워터 펌프(1)를 통해 엔진(2)의 실린더블록으로 유입되는 순환과정을 거치면서 냉각작용을 하도록 되어 있다.In general, the water-cooled cooling system for a vehicle, as shown in Figure 1, the cooling water of the engine is extruded from the water pump (1) to absorb the heat of the engine while passing through the cylinder block and the cylinder head of the engine (2) sequentially After discharging the heat through the outlet of the cylinder head and passing through the heater 3 or the radiator 4, the heat is passed through the water pump 1 to the cylinder block of the engine 2. While cooling.

그리고, 라디에이터(4)에는 냉각수온이 일정온도를 넘어설 경우 동작하여 공기를 송풍함으로써 라디에이터(4)의 열교환 성능을 향상시키도록 냉각팬 수단(5)이 구비되어 있다.In addition, the radiator 4 is provided with a cooling fan means 5 to operate when the cooling water temperature exceeds a predetermined temperature to blow air to improve the heat exchange performance of the radiator 4.

또한, 엔진(2)의 아울렛(Outlet) 온도를 감지하여 엔진 제어유닛(도시되지 않음)으로 온도감지신호를 입력하는 아울렛 온도 게이지(6)가 구비되어 있고, 냉각수온에 따라 개폐동작하여 냉각수의 순환경로를 절환하는 써모스탯(Thermostat)(7)이 포함된다.In addition, an outlet temperature gauge 6 for sensing an outlet temperature of the engine 2 and inputting a temperature sensing signal to an engine control unit (not shown) is provided. Thermostat (7) for switching the circulation path is included.

즉, 상기와 같이 구성된 냉각 시스템에서는, 냉각수온이 일정온도(예컨대, 80℃ 정도) 이하에서는 써모스탯(7)이 폐쇄되어 있음으로 인해 2점 쇄선으로 표시된 A 루프(Loop)를 따라 냉각수가 순환하는 경로를 형성함으로써 냉각수온 상승을 빠르게 하며, 냉각수온이 일정온도 이상이 되면 써모스탯(7)이 순간 개방됨으로써 점선으로 표시된 B 루프를 따라 냉각수가 순환하는 경로를 형성함으로써 냉각성능이 커지도록 이루어져 있다.That is, in the cooling system configured as described above, the cooling water circulates along the A loop indicated by the two-dot chain line because the thermostat 7 is closed when the cooling water temperature is lower than a predetermined temperature (for example, about 80 ° C). The cooling water temperature rises quickly by forming a path, and when the cooling water temperature is higher than a predetermined temperature, the thermostat 7 is momentarily opened to form a path through which the cooling water circulates along the B loop indicated by a dotted line, thereby increasing the cooling performance. have.

그런데, 상기와 같이 구성된 종래의 냉각시스템은, 엔진의 부하조건에 관계없이 일정한 온도를 기점으로 냉각수 순환 경로를 절환하도록 이루어져 있고, 써모스탯의 기계적인 특성에 따른 급격한 개방에 의해 냉각 수온이 일정시간 하강되는 바, 냉각수온을 최적의 온도로 일정하게 제어할 수 없고 엔진 냉각계에 열충격이 발생될 뿐만 아니라 차량 자체진단을 위한 OBD(On Board Diagnostic)의 냉각상태 감지에도 불안정성이 발생하는 문제점이 있었다. However, the conventional cooling system configured as described above is configured to switch the cooling water circulation path at a constant temperature regardless of the load condition of the engine, and the cooling water temperature is constant for a predetermined time due to the rapid opening according to the mechanical characteristics of the thermostat. As the temperature drops, the cooling water temperature cannot be controlled at an optimal temperature, thermal shock occurs in the engine cooling system, and instability occurs even in the cooling state detection of the OBD (On Board Diagnostic) for self-diagnosis of the vehicle. .

이에 본 발명은 상기와 같은 종래기술의 문제점을 해소하기 위해 안출한 것으로, 엔진의 부하조건에 따라 냉각 수온을 최적으로 제어하고 열충격 및 냉각상태 감지의 불안정성을 방지할 수 있는 차량의 냉각시스템 제어방법을 제공하는 데 그 목적이 있다.Accordingly, the present invention has been made to solve the above problems of the prior art, the cooling system temperature control method of the vehicle that can optimally control the cooling water temperature according to the load conditions of the engine and prevent the instability of thermal shock and cooling state detection The purpose is to provide.

상기 목적을 달성하기 위한 본 발명에 따른 차량의 냉각시스템 제어방법은, 워터 펌프에 의해 히터와 엔진 및 라디에이터로 냉각수가 순환하는 차량의 냉각시스템을 제어하는 방법에 있어서, 엔진의 스로틀 포지션과 엔진 회전수에 의해 운전 부하를 판단하는 스텝과, 상기 운전 부하에 따라 설정온도를 결정하는 설정온도 결정 스텝과, 상기 설정온도 결정 스텝에서 결정된 설정온도와 엔진의 온도를 비교하는 스텝, 상기 온도 비교의 스텝에서 온도를 비교한 결과에 따라 밸브수단의 밸브 개폐량을 제어하여 순환하는 냉각수량을 조절하는 스텝 및, 엔진의 온도에 따라 라디에이터를 냉각하는 냉각팬을 구동하고 그 속도를 조절하는 냉각팬 속도 조절스텝을 포함하고, 상기 냉각팬 속도 조절스텝에서는 상기 설정온도 결정 스텝에서 결정된 설정온도과 미리 설정된 가중치를 합산한 값을 엔진의 현재 온도와 비교한 값에 따라 상기 냉각팬 속도를 조절함을 특징으로 한다.In a method of controlling a cooling system of a vehicle according to the present invention for achieving the above object, in a method of controlling a cooling system of a vehicle in which coolant is circulated to a heater, an engine, and a radiator by a water pump, a throttle position and engine rotation of the engine A step of determining an operating load based on a number, a set temperature determining step of determining a set temperature according to the operating load, a step of comparing the set temperature determined in the set temperature determining step with an engine temperature, and a step of comparing the temperature Controlling the valve opening and closing amount of the valve means according to the result of comparing the temperature in the step of adjusting the amount of cooling water circulating, and controlling the speed of the cooling fan driving and controlling the speed of the cooling fan cooling the radiator according to the engine temperature And a setting temperature determined in the setting temperature determining step, in the cooling fan speed adjusting step. The cooling fan speed is adjusted according to a value obtained by adding a predetermined weight to a current temperature of the engine.

삭제delete

이하, 본 발명의 바람직한 실시예를 첨부된 도면을 참조하여 상세히 설명하기로 한다.Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 2는 본 발명의 바람직한 실시예에 따른 차량 냉각시스템의 개략도로서, 동도면을 참조하면 알 수 있듯이, 본 발명에 따른 차량의 냉각시스템은, 엔진의 냉각수가 워터 펌프(1)에서 압출되어 엔진(2)의 실린더블록과 실린더헤드 및 히터(3)를 순차적으로 거치면서 엔진의 열을 흡수하고, 실린더헤드의 출구 및 히터(3)의 출구를 통해 배출되어 라디에이터(4)를 거치면서 열을 방출한 뒤, 다시 워터 펌프(1)를 통해 엔진(2)의 실린더블록 및 히터(3)로 유입되는 순환과정을 거치면서 냉각작용을 하도록 되어 있다.2 is a schematic diagram of a vehicle cooling system according to a preferred embodiment of the present invention. As can be seen from the same figure, the cooling system of a vehicle according to the present invention includes an engine cooling water extruded from a water pump (1). (2) absorbs the heat of the engine while passing through the cylinder block, the cylinder head and the heater (3) in sequence, and is discharged through the outlet of the cylinder head and the outlet of the heater (3) to pass the heat through the radiator (4) After discharging, the water is pumped through the water pump 1 through a circulation process flowing into the cylinder block of the engine 2 and the heater 3.

그리고, 라디에이터(4)에는 냉각수온이 일정온도를 넘어설 경우 동작하여 공기를 송풍함으로써 라디에이터(4)의 열교환 성능을 향상시키도록 냉각팬 수단(5)이 구비되어 있고, 엔진(2)의 아울렛 온도를 감지하여 온도감지신호를 출력하는 아울렛 온도 게이지(6)가 구비되어 있다.In addition, the radiator 4 is provided with a cooling fan means 5 to operate when the cooling water temperature exceeds a predetermined temperature to blow air to improve the heat exchange performance of the radiator 4, the outlet of the engine 2 An outlet temperature gauge 6 for sensing a temperature and outputting a temperature detection signal is provided.

이와 더불어, 워터 펌프(1)와 엔진(2)과 히터(3) 및 라디에이터(4) 간의 냉각수의 개폐량을 조절하는 전자밸브수단과 이 전자밸브수단을 제어하는 제어부(20)가 구비되는데, 이 전자밸브수단은, 밸브(10)와 모터(11) 및 모터구동부(12)를 포함한다.In addition, the solenoid valve means for controlling the opening and closing amount of the cooling water between the water pump 1 and the engine 2 and the heater 3 and the radiator 4 and the control unit 20 for controlling the solenoid valve means are provided. This solenoid valve means includes the valve 10, the motor 11, and the motor drive part 12. As shown in FIG.

상기 밸브(10)는 동력의 인가에 따라 개폐량이 조절되는 형식의 밸브이고, 상기 모터(11)는 동력을 발생하여 상기 밸브(10)로 제공한다.The valve 10 is a valve of a type in which the opening and closing amount is adjusted in accordance with the application of the power, the motor 11 generates power to provide the valve 10.

예컨대, 상기한 모터(11)로는 회전위치의 검출이 불필요하고 입력신호에 따른 정확한 위치로 회전자가 이동하는 스텝핑 모터(Stepping Motor)가 사용될 수 있다.For example, a stepping motor may be used as the motor 11 in which the rotation position is not detected and the rotor moves to the correct position according to the input signal.

상기 모터 구동부(12)는 제어부(20)로부터 인가되는 신호에 따라 모터(11)로 전원을 인가하여 구동한다.The motor driver 12 drives the motor 11 by applying power to the motor 11 according to a signal applied from the controller 20.

상기 제어부(20)는 엔진(2)의 스로틀 포지션 센서(도시되지 않음)와 엔진 회전수 센서(도시되지 않음)로부터 입력되는 스로틀 포지션 감지값과 엔진 회전수 감지값에 따라 엔진(2)의 운전 부하를 판단하고 아울렛 온도 게이지(6)로부터 입력되는 온도감지신호에 의해 엔진(2)의 아울렛 온도를 판단한다.The controller 20 operates the engine 2 according to a throttle position detection value and an engine speed detection value input from a throttle position sensor (not shown) and an engine speed sensor (not shown) of the engine 2. The load is judged, and the outlet temperature of the engine 2 is judged by the temperature detection signal input from the outlet temperature gauge 6.

그리고, 제어부(20)는 상기 판단된 운전 부하와 엔진(2)의 아울렛 온도에 따라 냉각수의 순환 경로와 밸브 개폐량을 결정하여 그에 따라 밸브(10)를 개폐하기 위한 제어신호를 발생하여 모터 구동부(12)로 인가한다.The controller 20 determines the circulation path and the valve opening / closing amount of the coolant according to the determined operating load and the outlet temperature of the engine 2, and generates a control signal for opening and closing the valve 10 according to the motor driving unit. (12).

예컨대, 상기 제어부(20)로부터 발생하는 제어신호는 펄스폭변조신호(Pulse Width Modulation; "PWM")신호 일 수 있다.For example, the control signal generated from the control unit 20 may be a pulse width modulation signal (PWM) signal.

이제 상기와 같이 구성된 본 발명의 동작과정을 첨부된 도면을 참조하여 설명하기로 한다.The operation of the present invention configured as described above will now be described with reference to the accompanying drawings.

먼저, 제어부(20)는 엔진(2)의 스로틀 포지션 센서(도시되지 않음)와 엔진 회전수 센서(도시되지 않음)로부터 입력되는 스로틀 포지션 감지값과 엔진 회전수 감지값을 연산하여 엔진(2)의 운전 부하값을 구하고(S10), 현재 엔진(2)의 운전 부하가 전부하 운전 상태인지 중부하 운전 상태인지를 판단한다(S20).First, the controller 20 calculates a throttle position detection value and an engine speed detection value input from a throttle position sensor (not shown) and an engine speed sensor (not shown) of the engine 2, thereby calculating the engine 2. The operation load value of S1 is obtained (S10), and it is determined whether the current operation load of the engine 2 is at full load operation or heavy load operation state (S20).

상기 스텝(S20)에서의 판단 결과, 전부하 운전 상태이면, 제어부(20)는 목표온도를 제1 설정온도(T1)(예컨대, 90℃ 정도)로 결정하고, 아울렛 온도 게이지(6)로부터 입력되는 신호에 의해 현재 엔진(2)의 아울렛 온도를 감지하여, 현재 엔진(2)의 아울렛 온도를 제1 설정온도(T1)와 비교한다(S30).As a result of the determination in step S20, if it is the full load operation state, the control unit 20 determines the target temperature as the first set temperature T1 (for example, about 90 ° C), and inputs it from the outlet temperature gauge 6. The outlet temperature of the current engine 2 is sensed by the signal, and the outlet temperature of the current engine 2 is compared with the first set temperature T1 (S30).

상기 스텝(S30)에서의 비교결과, 현재 엔진(2)의 아울렛 온도가 제1 설정온도(T1)의 이하이면 냉각수온이 비교적 낮아 냉각수의 순환이 불필요한 상태이므로, 제어부(20)는 밸브(10)의 폐쇄상태를 유지함과 더불어 냉각팬 수단(5)의 오프(Off) 상태를 유지한다(S40).As a result of the comparison in the step S30, if the outlet temperature of the current engine 2 is less than or equal to the first set temperature T1, the coolant temperature is relatively low and the circulation of the coolant is unnecessary, so that the controller 20 controls the valve 10. In addition to maintaining the closed state of the cooling fan means 5 (Off) maintains the (Off) state (S40).

만약, 상기 스텝(S30)에서의 비교결과, 현재 엔진(2)의 아울렛 온도가 제1 설정온도(T1)보다 높으면, 제어부(20)는 미리 설정된 밸브 개폐량 A 만큼 밸브(10)를 개방하기 위한 제어신호를 발생하여 모터 구동부(12)로 인가함과 더불어, 냉각팬 수단(5)을 저속으로 구동하고(S50), 하기의 밸브 개폐량 PI 제어 스텝(S80)으로 진행하게 된다.If the outlet temperature of the current engine 2 is higher than the first set temperature T1 as a result of the comparison in the step S30, the controller 20 may open the valve 10 by a predetermined valve opening / closing amount A. The control signal is generated and applied to the motor driving unit 12, the cooling fan means 5 is driven at low speed (S50), and the valve opening / closing amount PI control step (S80) is performed.

상기 제어부(20)로부터의 제어신호에 의해 모터 구동부(12)가 모터(11)가 동작함으로써, 밸브(10)가 A 개폐량으로 개방되며, 이 밸브(10)의 개방으로 인해 엔진의 냉각수가 워터 펌프(1)에서 압출되어 엔진(2)의 실린더블록과 실린더헤드 및 히터(3)를 순차적으로 거치면서 엔진의 열을 흡수하고, 실린더헤드의 출구 및 히터(3)의 출구를 통해 배출되어 라디에이터(4)를 거치면서 열을 방출한 뒤, 다시 워터 펌프(1)를 통해 엔진(2)의 실린더블록 및 히터(3)로 유입되는 순환과정을 거치면서 냉각작용을 수행한다.When the motor 11 operates the motor 11 in response to a control signal from the controller 20, the valve 10 is opened at an A opening / closing amount, and the coolant of the engine is opened due to the opening of the valve 10. Extruded from the water pump (1) to sequentially pass through the cylinder block of the engine 2, the cylinder head and the heater (3) to absorb the heat of the engine, and is discharged through the outlet of the cylinder head and the outlet of the heater (3) After radiating heat while passing through the radiator 4, the cooling is performed while going through a circulation process introduced into the cylinder block and the heater 3 of the engine 2 through the water pump 1 again.

참고적으로, 상기 밸브 개폐량 A는 후술될 밸브 개폐량 B보다는 순환하는 냉각수량이 작도록 설정된 값이다.For reference, the valve opening and closing amount A is a value set such that the amount of cooling water circulated is smaller than the valve opening and closing amount B to be described later.

한편, 상기 스텝(S20)에서의 판단결과, 엔진(2)의 운전 부하 상태가 전부하 운전 상태가 아닌 중부하 운전 상태이면, 제어부(20)는 목표온도를 제2 설정온도(T2)(예컨대, 110℃ 정도)로 결정하고, 아울렛 온도 게이지(6)로부터 입력되는 신호에 의해 현재 엔진(2)의 아울렛 온도를 감지하여, 현재 엔진(2)의 아울렛 온도를 제2 설정온도(T2)와 비교한다(S60).On the other hand, when the determination result in the step S20 indicates that the operating load state of the engine 2 is a heavy load operation state instead of the full load operation state, the control unit 20 sets the target temperature to the second set temperature T2 (for example). , About 110 ° C.), and detects the outlet temperature of the current engine 2 by the signal input from the outlet temperature gauge 6, and compares the outlet temperature of the current engine 2 with the second set temperature T2. Compare (S60).

상기 스텝(S60)에서의 비교결과, 현재 엔진(2)의 아울렛 온도가 제1 설정온도(T1)의 이하이면 냉각수온이 비교적 낮아 냉각수의 순환이 불필요한 상태이므로, 제어부(20)는 밸브(10)의 폐쇄상태를 유지함과 더불어 냉각팬 수단(5)의 오프(Off) 상태를 유지하는 스텝(S40)으로 진행한다.As a result of the comparison in the step S60, if the outlet temperature of the current engine 2 is less than or equal to the first set temperature T1, the coolant temperature is relatively low and the circulation of the coolant is unnecessary, so that the controller 20 controls the valve 10. In step S40 of maintaining the closed state of the cooling fan means 5 while maintaining the closed state.

만약, 상기 스텝(S60)에서의 비교결과, 현재 엔진(2)의 아울렛 온도가 제1 설정온도(T2)보다 높으면, 제어부(20)는 미리 설정된 밸브 개폐량 B 만큼 밸브(10)를 개방하기 위한 제어신호를 발생하여 모터 구동부(12)로 인가함과 더불어, 냉각팬 수단(5)을 저속으로 구동하고(S70), 하기의 밸브 개폐량 PI 제어 스텝(S80)으로 진행하게 된다.If the outlet temperature of the current engine 2 is higher than the first set temperature T2 as a result of the comparison in the step S60, the controller 20 may open the valve 10 by a predetermined valve opening / closing amount B. The control signal is generated and applied to the motor driving unit 12, the cooling fan means 5 is driven at low speed (S70), and the valve opening / closing amount PI control step (S80) is performed.

상기 제어부(20)로부터의 제어신호에 의해 모터 구동부(12)가 모터(11)가 동작함으로써, 밸브(10)가 B 개폐량으로 개방되며, 이 밸브(10)의 개방으로 인해 엔진의 냉각수가 워터 펌프(1)에서 압출되어 엔진(2)의 실린더블록과 실린더헤드 및 히터(3)를 순차적으로 거치면서 엔진의 열을 흡수하고, 실린더헤드의 출구 및 히터(3)의 출구를 통해 배출되어 라디에이터(4)를 거치면서 열을 방출한 뒤, 다시 워터 펌프(1)를 통해 엔진(2)의 실린더블록 및 히터(3)로 유입되는 순환과정을 거치면서 냉각작용을 수행한다.When the motor 11 operates the motor 11 in response to a control signal from the controller 20, the valve 10 is opened in the amount of opening and closing B, and the coolant of the engine is opened due to the opening of the valve 10. Extruded from the water pump (1) to sequentially pass through the cylinder block of the engine 2, the cylinder head and the heater (3) to absorb the heat of the engine, and is discharged through the outlet of the cylinder head and the outlet of the heater (3) After radiating heat while passing through the radiator 4, the cooling is performed while going through a circulation process introduced into the cylinder block and the heater 3 of the engine 2 through the water pump 1 again.

참고적으로, 상기 밸브 개폐량 B는 앞서 설명한 밸브 개폐량 A보다는 순환하는 냉각수량이 크도록 설정된 값이다.For reference, the valve opening and closing amount B is a value set such that the amount of cooling water circulated is greater than the valve opening and closing amount A described above.

다음, 제어부(20)는 현재 엔진(2)의 온도와 기 결정된 설정온도(T1 또는 T2)를 입력 파라미터로 하는 비례적분제어(PI 제어)에 의해 밸브(10)의 개폐량을 세밀하게 가감함으로써, 냉각수온으로 목표로 하는 설정온도(T1 또는 T2)에 맞게 최적으로 유지한다(S80).Next, the control unit 20 finely decrements the opening / closing amount of the valve 10 by proportional integral control (PI control) using the current temperature of the engine 2 and the predetermined set temperature T1 or T2 as input parameters. To maintain optimally according to the target set temperature (T1 or T2) to the cooling water temperature (S80).

이와 더불어, 제어부(20)는, 현재 엔진(2)의 온도를 기 결정된 설정온도(T1 또는 T2)에 기설정된 온도 가중치(예컨대, 30℃ 정도)를 합산한 값과 비교한다(S90).In addition, the controller 20 compares the temperature of the current engine 2 with a value obtained by adding a predetermined temperature weight (for example, about 30 ° C.) to a predetermined set temperature T1 or T2 (S90).

상기 스텝(S90)에서의 비교결과, 현재 엔진(2)의 온도가 기 결정된 설정온도(T1 또는 T2)에 온도 가중치를 합산한 값보다 크면, 현재 냉각수온이 상당히 높아 보다 강력한 냉각성능이 필요한 상황이므로, 제어부(20)는 냉각팬 수단(5)을 고속으로 회전시킴으로써 라디에이터(4)의 열교환 성능을 증대시킨다(S100).As a result of the comparison in the step S90, if the temperature of the current engine 2 is greater than the sum of the temperature weights to the predetermined set temperature T1 or T2, the current cooling water temperature is considerably high, requiring more powerful cooling performance. Therefore, the control unit 20 increases the heat exchange performance of the radiator 4 by rotating the cooling fan means 5 at high speed (S100).

만약, 상기 스텝(S90)에서의 비교결과, 현재 엔진(2)의 온도가 기 결정된 설정온도(T1 또는 T2)에 온도 가중치를 합산한 값의 이하이면, 제어부(20)는 현재의 엔진(2) 온도를 제1 설정온도(T1)과 다시 비교한다(S110).If the comparison result in step S90 indicates that the temperature of the current engine 2 is equal to or less than the sum of the predetermined temperature T1 or T2 plus the temperature weight, the control unit 20 controls the current engine 2. ) The temperature is again compared with the first set temperature T1 (S110).

상기 스텝(S110)에서의 비교결과, 현재의 엔진(2) 온도가 제1 설정온도(T1) 이상이면, 제어부(20)는 밸브 개폐량 PI 제어 스텝(S80)으로 되돌아가는 반면, 현재의 엔진(2) 온도가 제1 설정온도(T1) 이하인 경우 운전 부하를 판단하는 스텝(S10)으로 되돌아간다.As a result of the comparison in step S110, if the present engine 2 temperature is equal to or greater than the first set temperature T1, the control unit 20 returns to the valve opening / closing amount PI control step S80, while the present engine (2) When the temperature is lower than or equal to the first set temperature T1, the flow returns to step S10 for determining the operating load.

상기에서 본 발명은 특정 실시예를 예시하여 설명하지만 본 발명이 상기 실시예에 한정되는 것은 아니다. 당업자는 본 발명에 대한 다양한 변형, 수정을 용이하게 만들 수 있으며, 이러한 변형 또는 수정이 본 발명의 특징을 이용하는 한 본 발명의 범위에 포함된다는 것을 명심해야 한다.The present invention is described above by illustrating specific embodiments, but the present invention is not limited to the above embodiments. Those skilled in the art can easily make various changes and modifications to the present invention, and it should be noted that such variations or modifications are included within the scope of the present invention as long as the features of the present invention are used.

상술한 바와 같이 본 발명은, 엔진의 운전 부하조건과 온도에 따라 냉각수량을 세밀하게 조절함으로써, 엔진의 부하조건에 따라 냉각 수온을 최적으로 제어하고 열충격 및 냉각상태 감지의 불안정성을 방지할 수 있는 효과가 있다.
특히, 제어부가 냉각팬 수단의 회전 속도를 저속 및 고속으로 각각 조절하는 과정에서 현재 엔진의 온도를 기 결정된 설정온도에 가중치를 고려한 값과 비교하는 것은 냉각팬 수단이 작동함에 따라 발생하는 진동의 측면을 고려한 것이고, 아울러 엔진의 냉각회로가 극한의 상황인 경우에 한해 냉각팬 수단을 고속으로 동작시켜 회로를 보호할 수 있게 된다. 이는 진동의 측면 보다는 엔진 냉각회로의 보호가 더 중요한 인자이기 때문이다.As described above, the present invention, by finely adjusting the amount of cooling water according to the operating load conditions and temperature of the engine, it is possible to optimally control the cooling water temperature according to the load conditions of the engine and to prevent instability of thermal shock and cooling state detection It works.
In particular, comparing the temperature of the current engine with a weight value to a predetermined set temperature in the process of controlling the rotation speed of the cooling fan means at a low speed and a high speed in terms of vibration generated as the cooling fan means operates. In addition, it is possible to protect the circuit by operating the cooling fan means at a high speed only when the engine cooling circuit is an extreme situation. This is because the protection of the engine cooling circuit is a more important factor than the aspect of vibration.

Claims (8)

삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 워터 펌프에 의해 히터와 엔진 및 라디에이터로 냉각수가 순환하는 차량의 냉각시스템을 제어하는 방법에 있어서, A method of controlling a cooling system of a vehicle in which cooling water is circulated to a heater, an engine, and a radiator by a water pump, 엔진의 스로틀 포지션과 엔진 회전수에 의해 운전 부하를 판단하는 스텝과, Determining the operating load based on the throttle position of the engine and the engine speed; 상기 운전 부하에 따라 설정온도를 결정하는 설정온도 결정 스텝과, A setting temperature determining step of determining a setting temperature according to the operating load; 상기 설정온도 결정 스텝에서 결정된 설정온도와 엔진의 온도를 비교하는 스텝, Comparing the set temperature determined in the set temperature determining step with the temperature of the engine, 상기 온도 비교의 스텝에서 온도를 비교한 결과에 따라 밸브수단의 밸브 개폐량을 제어하여 순환하는 냉각수량을 조절하는 스텝 및, Controlling the amount of coolant circulating by controlling the valve opening / closing amount of the valve means according to the result of comparing the temperature in the step of temperature comparison; 엔진의 온도에 따라 라디에이터를 냉각하는 냉각팬을 구동하고 그 속도를 조절하는 냉각팬 속도 조절스텝을 포함하고, A cooling fan speed adjusting step of driving a cooling fan for cooling the radiator according to the temperature of the engine and adjusting the speed thereof; 상기 냉각팬 속도 조절스텝에서는 상기 설정온도 결정 스텝에서 결정된 설정온도과 미리 설정된 가중치를 합산한 값을 엔진의 현재 온도와 비교한 값에 따라 상기 냉각팬 속도를 조절함을 특징으로 하는 차량의 냉각시스템 제어방법.In the cooling fan speed adjusting step, the cooling fan speed is controlled according to a value obtained by adding the set temperature determined in the setting temperature determining step and a predetermined weight to a current temperature of the engine. Way. 삭제delete 삭제delete
KR1020030065368A 2003-09-20 2003-09-20 method for controlling cooling system in automobile KR100589140B1 (en)

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JP2003420225A JP2005090480A (en) 2003-09-20 2003-12-17 Vehicle engine cooling system control device and its method
DE10359581A DE10359581B4 (en) 2003-09-20 2003-12-18 Method for controlling a vehicle engine cooling system
CNB2003101230750A CN100513753C (en) 2003-09-20 2003-12-24 Engine cooling system control apparatus for vehicles and method thereof
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