US20050061263A1 - Engine cooling system control apparatus for vehicles and method thereof - Google Patents

Engine cooling system control apparatus for vehicles and method thereof Download PDF

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Publication number
US20050061263A1
US20050061263A1 US10/749,236 US74923603A US2005061263A1 US 20050061263 A1 US20050061263 A1 US 20050061263A1 US 74923603 A US74923603 A US 74923603A US 2005061263 A1 US2005061263 A1 US 2005061263A1
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United States
Prior art keywords
engine
cooling water
cooling
temperature
response
Prior art date
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Abandoned
Application number
US10/749,236
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English (en)
Inventor
Se-Yong Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hyundai Motor Co
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Hyundai Motor Co
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Filing date
Publication date
Application filed by Hyundai Motor Co filed Critical Hyundai Motor Co
Assigned to HYUNDAI MOTOR COMPANY reassignment HYUNDAI MOTOR COMPANY ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LEE, SE-YONG
Publication of US20050061263A1 publication Critical patent/US20050061263A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to an engine cooling system control apparatus for vehicles and method thereof and, more particularly, to an engine cooling system control apparatus for vehicles and method thereof configured to optimally control a coolant temperature and to prevent thermal shock of a cooling system.
  • water-cooled cooling systems for vehicles are configured such that engine cooling water is ejected from a water pump to sequentially pass through a cylinder block of an engine and a cylinder head to absorb heat from the engine, and is discharged via an outlet in the cylinder head to pass through a heater or a radiator for transfer of the heat.
  • the cooling water is again introduced into the cylinder block via the water pump for circulatory cooling operation.
  • an outlet of an engine is equipped with a thermostat that opens and closes in relation to the cooling water temperature to switch a circulatory route of cooling water.
  • Embodiments of the present invention provide an engine cooling system control apparatus for vehicles and a method thereof configured to optimally control cooling water temperature in response to the load condition of an engine and to prevent a thermal shock and inaccuracy in measuring cooling water temperature.
  • an engine cooling system control apparatus in an engine cooling system configured to pump cooling water from a water pump to sequentially pass through an engine and a radiator for cooling the engine, comprises electronic valve means for adjusting the amount of cooling water circulating via the radiator.
  • a thermometer detects the temperature of the cooling water as it leaves the engine.
  • a controller controls the operation of the electronic valve means in response to the cooling water temperature detected by the thermometer to maintain an established target temperature.
  • the method for controlling an engine cooling system for vehicles configured to pump cooling water from a water pump to sequentially pass through an engine and a radiator for cooling the engine, comprises: (a) determining an operating load in response to a throttle position of an engine and engine revolutions per minute (RPM); (b) determining a pre-set temperature in response to the operating load; (c) comparing the pre-set temperature with a cooling water temperature; and (d) controlling the operation of the electronic valve means in response to the comparative result of the two temperatures to control the amount of circulating cooling water.
  • RPM revolutions per minute
  • FIG. 1 is a schematic drawing of an engine cooling system for vehicles according to an embodiment of the present invention.
  • FIG. 2 is a flow chart illustrating the operating process of the controller of FIG. 1 .
  • a preferred embodiment of an engine cooling system for vehicles includes a first circulatory route wherein cooling water of an engine 2 is pumped from a water pump 1 to pass through a cylinder block and a cylinder head of the engine for absorption of heat generated by the engine 2 .
  • the cooling water then passes through a heater core 3 and is introduced into the water pump 1 .
  • the preferred embodiment includes a second circulatory route wherein the cooling water is pumped from a water pump 1 to pass through a cylinder block and cylinder head for absorbing the heat of the engine and then passes through a radiator 4 for discharging the heat. Finally, the cooling water is re-introduced into the cylinder block of the engine 2 via the water pump 1 .
  • the cooling water flows at all times, and the amount of cooling water circulating therein is so little that the effect on cooling water temperature is minimal. Meanwhile, the amount of cooling water flowing in the second circulatory route is adjusted by electronic valve means 10 , 11 and 12 .
  • the radiator 4 includes cooling fan means 5 for blowing air when the cooling water exceeds a predetermined temperature to improve a heat exchange performance of the radiator 4 , and an outlet thermometer 6 for detecting the temperature of the cooling water at an outlet side of the engine 2 to produce a temperature signal.
  • a controller 20 controls the electronic valve means 10 , 11 and 12 , where the electronic valve means includes a valve 10 , a motor 11 and a motor driving part 12 .
  • the valve 10 is operated by application of power, generated by the motor 11 .
  • the motor 11 is preferably a stepping motor where detection of rotating position is unnecessary and a rotor is moved to a predetermined position in response to an input signal.
  • the motor driving part 12 applies power to the motor 11 in response to a signal from the controller 20 and drives the motor.
  • the controller 20 determines the operating load of the engine 2 in response to a throttle position value input from a throttle position sensor (not shown) of the engine 2 and an engine RPM detection value input from a tachometer (not shown), and determines the temperature of cooling water at an outlet side of the engine 2 in response to a temperature signal input from the outlet thermometer 6 .
  • the controller 20 determines the circulatory route of the cooling water and the valve 10 opening level in response to the operating load thus determined and the cooling water temperature at the outlet side to generate a control signal for operating the valve 10 in response thereto and sends the control signal to the motor driving part 12 .
  • the control signal generated by the controller 20 is preferably a Pulse Width Modulation (PWM) signal.
  • PWM Pulse Width Modulation
  • the controller 20 calculates the throttle position value input from the throttle position sensor (not shown) of the engine 2 and the engine RPM value input from the engine tachometer (not shown) to obtain an operating load value of the engine 2 (S 10 ), and determines whether the operating load of the engine 2 is a pre-set full load operating condition or a pre-set intermediate load operating load (S 20 ).
  • the controller 20 determines a target temperature as a first set temperature (T1) (e.g., approximately 90 degrees Celsius) and detects a current cooling water temperature at the outlet side of the engine 2 in response to a signal input from the outlet thermometer 6 to compare same with the first set temperature (T1) (S 30 ).
  • T1 a first set temperature
  • the controller 20 maintains the valve 10 in a closed position and the cooling fan means 5 in an OFF state, as the cooling water temperature is relatively low and there is no need for circulation of the cooling water through the radiator 4 (S 40 ).
  • the controller 20 If the current water temperature is higher than the first set temperature (T1) as determined by the comparison at S 30 , the controller 20 generates a control signal to the motor driving part 12 to drive motor 11 to open the valve 10 to a pre-set valve opening level (A), and drives the cooling fan means 5 at a low speed (S 50 ), where flow advances to a below-mentioned valve opening and closing level proportional integral (PI) control step (S 80 ).
  • PI proportional integral
  • the motor driving part 12 activates the motor 11 in response to the control signal of the controller 20 to thereby open the valve 10 to an opening level A.
  • the opening level of the valve 10 causes the cooling water in the engine to be discharged from the water pump 1 , and the cooling water sequentially passes through a cylinder block and cylinder head of the engine 2 for absorbing the heat of the engine.
  • the cooling water is discharged via an outlet of the cylinder head to discharge the heat via the radiator 4 , and is again introduced into the cylinder block of the engine 2 via the water pump 1 for circulatory cooling.
  • valve opening and closing level A is a pre-set value having a smaller amount of cooling water circulating than that of the valve opening and closing level B (described later).
  • the controller 20 chooses a target temperature as a second set temperature (T2, e.g., 110 degrees Celsius) and detects a current cooling temperature at the outlet side of the engine 2 in response to the signal from the outlet thermometer 6 to compare same with the second set temperature (T2) (S 60 ).
  • T2 a second set temperature
  • T2 e.g. 110 degrees Celsius
  • the controller 20 maintains the valve 10 in the closed position, where the flowchart advances to S 40 for maintaining the OFF state of the cooling fan means 5 because the cooling temperature is relatively low and cooling water circulation is not required.
  • the controller 20 As a result of the comparison at S 60 , if the current outlet temperature of the engine 2 is higher than the second set temperature (T2), the controller 20 generates a control signal for opening the valve 10 to a pre-set valve opening and closing level to send same to the motor driving part 12 , and simultaneously drives the cooling fan means 5 at a low speed (S 70 ), where the flowchart advances to the below-mentioned valve opening and closing level (PI) control step (S 80 ).
  • PI valve opening and closing level
  • the motor driving part 12 drives the motor 11 in response to the control signal from the controller 20 to open the valve 10 up to the valve opening and closing level (B), and the cooling water of the engine is forced out from the pump 1 in response to the opening level of the valve 10 .
  • the cooling water then sequentially passes through the cylinder block and the cylinder head to absorb the heat of the engine.
  • the cooling water is then discharged via the outlet of the cylinder head to discharge the heat via the radiator 4 and is returned to the cylinder block of the engine 2 via the water pump 1 to carry out the circulatory cooling process.
  • valve opening and closing level B is larger than the aforementioned valve opening and closing level A in terms of allowing flow of cooling water.
  • the controller 20 accurately increases or reduces the valve opening and closing level via a PI control that uses the current engine temperature and the pre-set temperature (T1 or T2) as input parameters, whereby the cooling water temperature can be optimally maintained to meet the targeted pre-set temperature (T1 or T2) (S 80 ).
  • the controller 20 compares the current cooling temperature with a summed-up value where the pre-set temperature (T1 or T2) is added to a pre-set temperature aggravated value (e.g., approximately 30 degrees Celsius) (S 90 ).
  • the controller 20 rotates the cooling fan means 5 at a high speed to increase the heat exchange performance of the radiator 4 because the current cooling water temperature is fairly high, necessitating greater cooling performance (S 100 ).
  • the controller 20 re-compares the current cooling temperature with the first set temperature (T1) (S 110 ).
  • the controller 20 returns to the valve opening and closing level PI control step (S 80 ), and if the current cooling temperature is less than the first set temperature (T1), the flowchart returns to S 10 for determining the operating load.
  • cooling water flow can be accurately adjusted in response to operating load conditions and temperature of an engine, thereby allowing optimal control of cooling water temperature in response to the load conditions of the engine and preventing thermal shock and instability in cooling operation.

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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)
  • Control Of Temperature (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Air-Conditioning For Vehicles (AREA)
US10/749,236 2003-09-20 2003-12-30 Engine cooling system control apparatus for vehicles and method thereof Abandoned US20050061263A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020030065368A KR100589140B1 (ko) 2003-09-20 2003-09-20 차량의 냉각시스템 제어방법
KR10-2003-0065368 2003-09-20

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US20050061263A1 true US20050061263A1 (en) 2005-03-24

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US10/749,236 Abandoned US20050061263A1 (en) 2003-09-20 2003-12-30 Engine cooling system control apparatus for vehicles and method thereof

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US (1) US20050061263A1 (ko)
JP (1) JP2005090480A (ko)
KR (1) KR100589140B1 (ko)
CN (1) CN100513753C (ko)
DE (1) DE10359581B4 (ko)

Cited By (10)

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US20140093393A1 (en) * 2011-06-22 2014-04-03 Toyota Jidosha Kabushiki Kaisha Control device for electric water pump
US20140172273A1 (en) * 2012-12-13 2014-06-19 GM Global Technology Operations LLC System and method for controlling torque output of an engine when a water pump coupled to the engine is switched on or off
US9170570B2 (en) 2011-06-14 2015-10-27 Toyota Jidosha Kabushiki Kaisha Cooling apparatus for internal combustion engine
CN105673181A (zh) * 2016-02-15 2016-06-15 潍柴动力股份有限公司 整车热管理方法及整车热管理系统
US20160319759A1 (en) * 2015-04-28 2016-11-03 Toyota Jidosha Kabushiki Kaisha Control system for internal combustion engine
US20170074153A1 (en) * 2015-09-15 2017-03-16 Toyota Jidosha Kabushiki Kaisha Cooling device and cooling method for engine
US10034415B2 (en) * 2016-12-28 2018-07-24 Jingway Technology Co., Ltd. Water cooling device
CN109466314A (zh) * 2018-11-23 2019-03-15 汽解放汽车有限公司 一种纯电动商用车冷却系统及控制方法
US20200277887A1 (en) * 2017-08-08 2020-09-03 Audi Ag Method for operating a drive device of a motor vehicle, and corresponding drive device
CN113665348A (zh) * 2021-09-01 2021-11-19 一汽解放汽车有限公司 一种冷却系统及冷却方法

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FR2896271B1 (fr) * 2006-01-19 2012-08-17 Renault Sas Procede et dispositif de regulation de la temperature d'un moteur a combustion interne
JP4862456B2 (ja) * 2006-03-31 2012-01-25 マツダ株式会社 エンジンの始動装置
JP4661927B2 (ja) * 2008-09-17 2011-03-30 トヨタ自動車株式会社 エンジンの冷却水量判定装置
EP2441935A4 (en) * 2009-09-08 2012-09-19 Toyota Motor Co Ltd COOLING SYSTEM FOR VEHICLE
FR2951114B1 (fr) * 2009-10-13 2011-11-04 Peugeot Citroen Automobiles Sa Dispositif de refroidissement pour vehicule hybride
WO2012086056A1 (ja) * 2010-12-24 2012-06-28 トヨタ自動車株式会社 車両および車両の制御方法
KR101409483B1 (ko) 2012-08-07 2014-06-18 한국기계연구원 차량 엔진 냉각수 제어 장치 및 방법
KR101394051B1 (ko) * 2012-12-17 2014-05-09 현대자동차 주식회사 차량용 엔진 냉각 시스템 및 그 제어방법
CN103711566B (zh) * 2013-01-23 2016-03-30 日立汽车系统(苏州）有限公司 发动机系统
CN103485874B (zh) * 2013-10-10 2016-01-20 河南柴油机重工有限责任公司 一种船用柴油机单循环混合冷却系统及冷却方法
US9719406B2 (en) * 2015-01-09 2017-08-01 GM Global Technology Operations LLC Engine out coolant temperature correction
CN105370376A (zh) * 2015-12-24 2016-03-02 玉柴联合动力股份有限公司 一种工程机械用柴油机冷却系统及其控制方法
CN107664058B (zh) * 2016-07-28 2020-09-04 长城汽车股份有限公司 发动机的冷却系统控制方法、系统及车辆
CN109236450A (zh) * 2018-09-27 2019-01-18 潍柴动力股份有限公司 一种发动机的冷却系统、控制方法及发动机
CN109339933A (zh) * 2018-10-31 2019-02-15 吉林大学 非最小相位发动机冷却系统水温控制方法
CN110848013B (zh) * 2019-10-17 2021-11-23 江苏大学 一种醇-柴油双燃料发动机智能热管理系统及控制方法
CN113147365A (zh) * 2020-08-07 2021-07-23 长城汽车股份有限公司 用于车辆的冷却控制方法、装置、存储介质及电子设备
KR20220038993A (ko) * 2020-09-21 2022-03-29 현대자동차주식회사 냉각수온 기반 엔진과열방지 방법 및 엔진 시스템
CN114439594A (zh) * 2022-03-01 2022-05-06 联合汽车电子有限公司 一种温度控制方法、装置、存储介质、热管理模块及车辆

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9170570B2 (en) 2011-06-14 2015-10-27 Toyota Jidosha Kabushiki Kaisha Cooling apparatus for internal combustion engine
US9695827B2 (en) * 2011-06-22 2017-07-04 Toyota Jidosha Kabushiki Kaisha Control device for electric water pump
US20140093393A1 (en) * 2011-06-22 2014-04-03 Toyota Jidosha Kabushiki Kaisha Control device for electric water pump
US20140172273A1 (en) * 2012-12-13 2014-06-19 GM Global Technology Operations LLC System and method for controlling torque output of an engine when a water pump coupled to the engine is switched on or off
US9086026B2 (en) * 2012-12-13 2015-07-21 GM Global Technology Operations LLC System and method for controlling torque output of an engine when a water pump coupled to the engine is switched on or off
US10280859B2 (en) * 2015-04-28 2019-05-07 Toyota Jidosha Kabushiki Kaisha Control system for internal combustion engine
US20160319759A1 (en) * 2015-04-28 2016-11-03 Toyota Jidosha Kabushiki Kaisha Control system for internal combustion engine
US20170074153A1 (en) * 2015-09-15 2017-03-16 Toyota Jidosha Kabushiki Kaisha Cooling device and cooling method for engine
US10227910B2 (en) * 2015-09-15 2019-03-12 Toyota Jidosha Kabushiki Kaisha Cooling device and cooling method for engine
CN105673181A (zh) * 2016-02-15 2016-06-15 潍柴动力股份有限公司 整车热管理方法及整车热管理系统
US10034415B2 (en) * 2016-12-28 2018-07-24 Jingway Technology Co., Ltd. Water cooling device
US20200277887A1 (en) * 2017-08-08 2020-09-03 Audi Ag Method for operating a drive device of a motor vehicle, and corresponding drive device
US10982584B2 (en) * 2017-08-08 2021-04-20 Audi Ag Method for operating a drive device of a motor vehicle, and corresponding drive device
CN109466314A (zh) * 2018-11-23 2019-03-15 汽解放汽车有限公司 一种纯电动商用车冷却系统及控制方法
CN113665348A (zh) * 2021-09-01 2021-11-19 一汽解放汽车有限公司 一种冷却系统及冷却方法

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Publication number Publication date
KR100589140B1 (ko) 2006-06-12
KR20050029056A (ko) 2005-03-24
DE10359581A1 (de) 2005-05-04
CN100513753C (zh) 2009-07-15
JP2005090480A (ja) 2005-04-07
CN1598262A (zh) 2005-03-23
DE10359581B4 (de) 2006-11-09

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