EP0744539A2 - Système de refroidissement avec un actuateur commandé électriquement - Google Patents

Système de refroidissement avec un actuateur commandé électriquement Download PDF

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Publication number
EP0744539A2
EP0744539A2 EP96105513A EP96105513A EP0744539A2 EP 0744539 A2 EP0744539 A2 EP 0744539A2 EP 96105513 A EP96105513 A EP 96105513A EP 96105513 A EP96105513 A EP 96105513A EP 0744539 A2 EP0744539 A2 EP 0744539A2
Authority
EP
European Patent Office
Prior art keywords
coolant temperature
cooling system
actuator
control
controller
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96105513A
Other languages
German (de)
English (en)
Other versions
EP0744539B1 (fr
EP0744539A3 (fr
Inventor
Josef Krowiorz
Norbert Dr. Deussen
Uwe Brendel
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0744539A2 publication Critical patent/EP0744539A2/fr
Publication of EP0744539A3 publication Critical patent/EP0744539A3/fr
Application granted granted Critical
Publication of EP0744539B1 publication Critical patent/EP0744539B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F01P2023/00—Signal processing; Details thereof
    • F01P2023/08—Microprocessor; Microcomputer
    • 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
    • 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
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed

Definitions

  • the invention relates to a cooling system with an electrically controllable actuator for influencing the coolant temperature of internal combustion engines in motor vehicles according to the preamble of claim 1.
  • Such a cooling system is known for example from DE 43 24 178 A1.
  • This known cooling system for internal combustion engines has a cooler and a thermostatic valve as an electrically controllable actuator with which the temperature of the coolant can be controlled in a warm-up mode, a mixed mode and a cooler mode.
  • the thermostatic valve as an electrically controllable actuator contains an expansion element which can be heated electrically to reduce the coolant temperature.
  • the thermostatic valve regulates the flow of the coolant between the internal combustion engine and the cooler in such a way that the coolant coming from the internal combustion engine flows back to the internal combustion engine essentially bypassing the cooler through a short circuit during warm-up operation, so that during the mixed operation that of the Internal coolant flows partially through the cooler and partially through the short circuit back to the internal combustion engine and that during cooler operation the coolant coming from the internal combustion engine essentially flows back through the cooler to the internal combustion engine. Due to the electrical heating of the electrically controllable actuator the opening cross section for the flow of the coolant to the cooler is increased compared to an opening cross section caused by the temperature of the coolant.
  • the electrically controllable actuator is electrically heated via a control device, by means of which the actual coolant temperature is detected and compared with a predetermined desired coolant temperature. If the detected actual coolant temperature is above the target coolant temperature, the electrical heating is switched on to cool the coolant, while when the actual coolant temperature is below the predetermined target coolant temperature, the electrical heating of the electrically controllable actuator is switched off.
  • This known cooling system depending on the actual coolant temperature, only performs a two-point control in comparison with the target coolant temperature, so that strong undershoots or overshoots can occur with respect to the target coolant temperature to be achieved.
  • the parameters of the controller are determined by means of a basic map and by means of at least one correction map.
  • a PID controller is particularly suitable for regulating the cooling system with an electronically or electrically controllable actuator for influencing the coolant temperature of internal combustion engines, in order to achieve the predetermined target coolant temperature as quickly as possible.
  • a PID controller can be constructed either in an analog or digital manner and can be integrated, for example, in an electronic control device that is already present to control the cooling system and / or the internal combustion engine.
  • the outlay and the costs for a cooling system according to the invention are only small, despite the improved control.
  • the regulator can also be another electronic regulator, e.g. B. a PI n D n - or a PI controller.
  • the controller is preferably designed in accordance with a physical model of the cooling process.
  • the quantity influenced by the coolant temperature can also be the coolant temperature itself.
  • the control signal variable can also be generated as a function of further operating parameters.
  • the characteristic diagram should also include a characteristic curve, a table and / or a corresponding algorithm.
  • An electronic control unit is preferably provided in which the controller is integrated and in which the characteristic diagrams, characteristic curves, tables and / or algorithms are stored.
  • the determination of the control parameters by means of a basic map and a correction map enables, on the one hand, very fast regulation by specifying a pilot control value by means of the basic map and, on the other hand, very precise regulation by specifying a correction value by means of the correction map, e.g. B. in response to the specification of the pre-control value.
  • the parameters of the controller are determined by means of a basic map taking into account at least one operating parameter and by means of determined at least one correction map taking into account the control difference.
  • the basic map according to the invention preferably takes into account the actual coolant temperature and the engine speed.
  • a correction map is preferably provided for both the I component and the P component of the controller.
  • These correction maps take into account at least the control difference, i. H. the difference between the actual coolant temperature and the specified target coolant temperature.
  • further operating parameters can be provided both in the basic map and in the correction map (s), e.g. B. the current position of the actuator, the engine load, the vehicle electrical system voltage, the vehicle speed, the outside temperature, the switching state of the air conditioning system and / or wind influences.
  • a further advantageous embodiment of the invention is the subject of claim 3.
  • the values of the basic and correction maps are added to determine the parameters of the controller.
  • additional operating parameters can also be taken into account in addition to the values of the characteristic diagrams.
  • control signal size is preferably a pulse width modulated signal. This enables a very sensitive control of the actuator, since a resolution of at least 1% is customary for pulse-width-modulated signals as the control signal variable.
  • the output A of an internal combustion engine 1 leads via a coolant-carrying line to an input of the actuator 3 in the form of an electrically heatable thermostatic valve.
  • An output of the actuator 3 is connected to the input E of the internal combustion engine 1 via a coolant-carrying line.
  • the input of a cooler 2 is connected via a coolant-carrying line. The output of the cooler 2 leads to the input E of the internal combustion engine 1.
  • actuator 3 in the form of an electrically heatable thermostatic valve, reference is made, for example, to DE 43 24 178 A1.
  • the actuator 3 is shown in warm-up.
  • the coolant is returned from output A of internal combustion engine 1 in a kind of short circuit via actuator 3 to input E of internal combustion engine 1, bypassing cooler 2.
  • the actuator 3 is activated in such a way that the coolant is at least partially guided over the cooler 2 in mixed operation or in cooler operation.
  • the more the actuator 3 is heated by the control signal PWM the more the actuator 3 is shifted in the direction of the cooler operation; d. H. the right passage, shown here fully open, is closed more and more, while the left passage, shown here completely closed, is opened ever more.
  • the control signal PWM as a control signal variable is an output signal of the PID controller 4.
  • the PID controller 4 can also be integrated in an electronic control unit.
  • the PID controller 4 receives at least the actual coolant temperature T ist as an input signal from the internal combustion engine 1.
  • the following additional input signals to the PID controller 4 zoom out:
  • three maps are stored in the PID controller 4.
  • the basic map K G gives z.
  • As a function of the actual coolant temperature T and the engine speed n a pilot control value T VSW before.
  • a first correction value T P is specified for the P component of the PID controller 4 via the first correction characteristic map K K1 and a second correction value T I is specified for the I component of the PID controller 4 via the second correction characteristic map , the first Correction value T P and the second correction value T I are determined at least as a function of the control difference T soll - T ist . According to the invention, it is also possible to use only one correction map K K1 or K K2 if the accuracy of the controller is not so high.
  • the control signal size for controlling the actuator 3 is the pulse width modulated control signal PWM.
  • the pulse-pause ratio of the control signal PWM preferably results from the following formula: (T VSW + T P + T I. ) U should / U b
  • the driving signal PWM is a correction factor after the addition of the values of the basic (T VSW) and correction maps (T P, T I) depending on the ratio of the target-vehicle electrical system voltage (U soll) to the actual vehicle electrical system voltage (U b ) provided.
  • T VSW the basic
  • T I correction maps
  • other operating parameters such as. B. the throttle valve angle DK, the vehicle speed v and the outside temperature T a are also taken into account.
  • the control quality is compared depending on the use of different maps to determine the control signal size PWM.
  • 2 shows the actual coolant temperature T ist over time t.
  • the predetermined desired coolant temperature T set1 change to the target coolant temperature T set2.
  • the upper characteristic curve of the diagram shows the control behavior if only the PWM is used to determine the control signal variable Pre- control signal value T VSW of the basic map K G is used.
  • the middle course of the diagram in FIG. 2 shows the control behavior when using the basic map K G and only one correction map K K1 .
  • the middle course of the diagram in FIG. 2 which results from an actuating signal variable in which at least the values T VSW and T P are added, already shows a better control quality compared to the upper course.
  • the new target coolant temperature T soll2 is reached as quickly as possible in the lower course and, on the other hand, in all three courses the use of the PID controller 4 according to the invention achieves the newly specified target coolant temperature T soll2 without undershoot or overshoot.
  • a control optimization is thus created by the exemplary embodiment according to the invention, by means of which, depending on the information available about operating parameters, a very quick and precise setting of the predetermined target coolant temperature is possible.
  • the invention is not restricted to the exemplary embodiment mentioned. So instead of the thermostatic valve 3 or additionally as an electrically or electronically controllable actuator z.
  • a coolant supply pump provided in the coolant circuit can be regulated according to the invention - or an electrically controllable coolant throttle valve.
  • the invention covers each actuator that can be controlled electrically or electronically to influence the coolant temperature.
  • the control signal size does not necessarily have to be a pulse-width-modulated signal, but can also - according to the design of the actuator - be any suitable electrical signal, such as, for. B. a displacement-proportional voltage signal or a frequency-modulated pulse.
  • a variable influenced by the coolant temperature may be, for example, a different temperature instead of the coolant temperature itself, such as, for. B. that of a coolant-flowed component.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feedback Control In General (AREA)
  • Control Of Temperature (AREA)
EP96105513A 1995-05-26 1996-04-06 Système de refroidissement avec un actuateur commandé électriquement Expired - Lifetime EP0744539B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19519377 1995-05-26
DE19519377A DE19519377A1 (de) 1995-05-26 1995-05-26 Kühlanlage mit elektrisch regelbarem Stellglied

Publications (3)

Publication Number Publication Date
EP0744539A2 true EP0744539A2 (fr) 1996-11-27
EP0744539A3 EP0744539A3 (fr) 1997-08-27
EP0744539B1 EP0744539B1 (fr) 2003-01-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP96105513A Expired - Lifetime EP0744539B1 (fr) 1995-05-26 1996-04-06 Système de refroidissement avec un actuateur commandé électriquement

Country Status (3)

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US (1) US5758607A (fr)
EP (1) EP0744539B1 (fr)
DE (2) DE19519377A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19948160A1 (de) * 1999-10-07 2001-04-12 Volkswagen Ag Kühlvorrichtung für eine flüssigkeitsgekühlte Brennkraftmaschine eines Kraftfahrzeuges
EP0889211A3 (fr) * 1997-07-02 2001-08-29 Nippon Thermostat Co., Ltd. Dispositif et procédé pour commander le refroidissement d'un moteur de combustion interne

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DE19858988A1 (de) * 1998-12-21 2000-06-29 Volkswagen Ag Heizungsanlage für den Innenraum eines Fahrzeuges
FR2804719B1 (fr) * 2000-02-03 2002-06-21 Peugeot Citroen Automobiles Sa Dispositif de refroidissement d'un moteur de vehicule automobile
FR2804722B1 (fr) 2000-02-03 2002-03-08 Peugeot Citroen Automobiles Sa Dispositif de refroidissement d'un moteur de vehicule automobile
FR2804720B1 (fr) * 2000-02-03 2002-06-21 Peugeot Citroen Automobiles Sa Dispositif de refroidissement d'un moteur de vehicule automobile
FR2806444B1 (fr) 2000-03-17 2002-06-07 Peugeot Citroen Automobiles Sa Dispositif de refroidissement d'un moteur de vehicule automobile
US6634322B2 (en) 2001-04-12 2003-10-21 Cold Fire, Llc Heat exchanger tempering valve
DE10123444B4 (de) * 2001-05-14 2006-11-09 Siemens Ag Regelanlage zum Regeln der Kühlmitteltemperatur einer Brennkraftmaschine
JP2003003846A (ja) * 2001-06-21 2003-01-08 Aisan Ind Co Ltd エンジン冷却装置
US6684826B2 (en) * 2001-07-25 2004-02-03 Toyota Jidosha Kabushiki Kaisha Engine cooling apparatus
ITTO20020852A1 (it) * 2002-10-02 2004-04-03 Mark Iv Systemes Moteurs Sa Sistema di controllo per un impianto di raffreddamento del motore di
US7139169B2 (en) * 2003-12-11 2006-11-21 Dell Products L.P. System and method for information handling system cooling fan operating parameter selection
JP4753278B2 (ja) * 2004-10-12 2011-08-24 臼井国際産業株式会社 外部制御式ファンクラッチの制御方法
FR2896272B1 (fr) * 2006-01-19 2012-08-17 Renault Sas Procede et dispositif de controle de la premiere ouverture d'un thermostat regulant la temperature d'un moteur a combustion interne.
DE102007044385A1 (de) * 2007-09-17 2009-04-02 Sitronic Gesellschaft für elektrotechnische Ausrüstung mbH. & Co. KG Kühlmittelkreislauf zur Regelung der Temperatur einer Kühlflüssigkeit und Kraftfahrzeug damit
BRPI0822870A8 (pt) * 2008-06-17 2015-09-29 Melling Do Brasil Componentes Automotivos Ltda Válvula de controle de temperatura, e, método para regular um fluxo de refrigerante em um sistema de resfriamento automotivo
US10570844B2 (en) * 2012-01-18 2020-02-25 Ford Global Technologies, Llc Air/fuel imbalance monitor
US9719407B2 (en) 2012-08-03 2017-08-01 Ford Global Technologies, Llc Method for regulating engine temperature
JP2014101876A (ja) * 2012-11-20 2014-06-05 Hyundai Motor Company Co Ltd サーモスタットを備えたエンジンシステム
DE102015216420B4 (de) * 2014-08-29 2020-02-20 Volkswagen Aktiengesellschaft Kühlanordnung zur Ladeluftkühlung
US10206312B2 (en) 2015-12-21 2019-02-12 Dell Products, L.P. Liquid cooled rack information handling system having storage drive carrier for leak containment and vibration mitigation
US9839164B2 (en) 2015-12-21 2017-12-05 Dell Products, L.P. Rack information handling system having modular liquid distribution (MLD) conduits
US10010013B2 (en) 2015-12-21 2018-06-26 Dell Products, L.P. Scalable rack-mount air-to-liquid heat exchanger
US10146231B2 (en) * 2015-12-21 2018-12-04 Dell Products, L.P. Liquid flow control based upon energy balance and fan speed for controlling exhaust air temperature
US9795065B2 (en) 2015-12-21 2017-10-17 Dell Products, L.P. Integrated air-spring for hydraulic force damping of a rigid liquid cooling subsystem
US10156873B2 (en) 2015-12-21 2018-12-18 Dell Products, L.P. Information handling system having fluid manifold with embedded heat exchanger system
US10064314B2 (en) 2015-12-21 2018-08-28 Dell Products, L.P. Runtime service of liquid cooled servers operating under positive hydraulic pressure without impacting component performance
JP6806016B2 (ja) * 2017-09-25 2020-12-23 トヨタ自動車株式会社 エンジン冷却装置

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DE4324178A1 (de) * 1993-07-19 1995-01-26 Bayerische Motoren Werke Ag Kühlanlage für einen Verbrennungsmotor eines Kraftfahrzeuges mit einem Thermostatventil, das ein elektrisch beheizbares Dehnstoffelement enthält
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0889211A3 (fr) * 1997-07-02 2001-08-29 Nippon Thermostat Co., Ltd. Dispositif et procédé pour commander le refroidissement d'un moteur de combustion interne
DE19948160A1 (de) * 1999-10-07 2001-04-12 Volkswagen Ag Kühlvorrichtung für eine flüssigkeitsgekühlte Brennkraftmaschine eines Kraftfahrzeuges
DE19948160B4 (de) * 1999-10-07 2010-07-15 Wilhelm Kuhn Kühlvorrichtung für eine flüssigkeitsgekühlte Brennkraftmaschine eines Kraftfahrzeuges

Also Published As

Publication number Publication date
DE59610017D1 (de) 2003-02-06
DE19519377A1 (de) 1996-11-28
EP0744539B1 (fr) 2003-01-02
US5758607A (en) 1998-06-02
EP0744539A3 (fr) 1997-08-27

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