EP0744539B1 - 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
EP0744539B1
EP0744539B1 EP96105513A EP96105513A EP0744539B1 EP 0744539 B1 EP0744539 B1 EP 0744539B1 EP 96105513 A EP96105513 A EP 96105513A EP 96105513 A EP96105513 A EP 96105513A EP 0744539 B1 EP0744539 B1 EP 0744539B1
Authority
EP
European Patent Office
Prior art keywords
controller
coolant temperature
actuator
cooling system
coolant
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.)
Expired - Lifetime
Application number
EP96105513A
Other languages
German (de)
English (en)
Other versions
EP0744539A3 (fr
EP0744539A2 (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 Thermostat valve as an electrically adjustable actuator with which the temperature of the coolant in a warm-up mode, a mixed mode and a cooler mode is adjustable.
  • a thermostatic valve as an electrically controllable actuator an expansion element that is used to reduce the coolant temperature electrically is heated.
  • the thermostatic valve regulates the flow of the Coolant between the engine and the radiator such that during the warm-up operation, the coolant coming from the internal combustion engine in essentially bypassing the cooler through a short circuit Internal combustion engine flows back that during the mixed operation of the Internal coolant coming partially through the radiator and partially flows back through the short circuit to the internal combustion engine and that comes from the internal combustion engine during cooler operation Coolant 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 radiator compared to an opening cross section caused by the temperature of the coolant increased.
  • the electrically controllable actuator is electrically heated by a Control device by means of which the actual coolant temperature is recorded and with a predetermined target coolant temperature is compared. Is the recorded actual coolant temperature above the target coolant temperature is used to cool the Coolant turned on the electric heater while at a tst coolant temperature below the specified target coolant temperature, the electrical Heating of the electrically controllable actuator is switched off.
  • This known cooling system performs depending on the actual coolant temperature compared to the target coolant temperature, only a two-point control , which means that there are strong or overshoots can occur.
  • the electrically controllable actuator for influencing the coolant temperature in internal combustion engines is an electrically adjustable one Coolant delivery pump is.
  • this known cooling system especially with regard to the speed control of the coolant delivery pump, described.
  • EP 0 557 113 A2 describes a cooling system with an electrically controllable one Actuator for influencing the coolant temperature of internal combustion engines in Motor vehicles known.
  • the target coolant temperature from one Map depending on various operating parameters.
  • a correction value in the form of a gain factor is taken from a correction map, the difference between the coolant temperature in the radiator and the coolant temperature depends on the engine input. Otherwise concerns the EP 0 557 113 A2 merely the determination and setting of a specific target coolant temperature, not the strategy of achieving one already predetermined target coolant temperature.
  • 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 controlling 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.
  • Such a PID controller can be constructed either in an analog or digital manner and, for example, can be integrated in an electronic control device for controlling the cooling system and / or the internal combustion engine which is already present.
  • the outlay and the costs for a cooling system according to the invention are only small, despite improved regulation.
  • 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 term “characteristic diagram” is also intended to be a characteristic curve, a table and / or comprise a corresponding algorithm.
  • an electronic one Control device provided in which the controller is integrated and in which the Maps, characteristic curves, tables and / or algorithms are stored.
  • the determination of the control parameters by means of a basic map under Consideration of at least one operating parameter and at least one Correction map taking into account the control difference enables to a very quick regulation by specifying a pre-control value by means of of the basic map and secondly a very precise regulation by the Specification of a correction value by means of the correction map, e.g. B. on the Reaction according to the input tax value.
  • the basic map is taken into account preferably the actual coolant temperature and the engine speed.
  • These correction maps take into account at least the control difference, d. H.
  • a further advantageous embodiment of the invention is the subject of claim 2.
  • the values of the basic and correction maps are added to determine the parameters of the controller.
  • other operating parameters can also be taken into account in addition to the values of the characteristic diagrams.
  • the control signal size is preferably a pulse width modulated signal. hereby a very sensitive control of the actuator is possible, since usually at pulse width modulated signals as control signal size a resolution of at least 1% is common.
  • 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 via a coolant Line connected to the input E of the internal combustion engine 1.
  • the output of the cooler 2 leads to the input E of the internal combustion engine 1.
  • Thermostat valve may be referred to DE 43 24 178 A1, for example.
  • the actuator 3 is shown in warm-up. During a warm-up the coolant from the output A of the internal combustion engine 1 in a kind of short circuit via the actuator 3 to the input E of the internal combustion engine 1 bypassing of the cooler 2 returned. After warming the coolant to operating temperature the actuator 3 is controlled such that in mixed operation or in cooler operation, the coolant is at least partially guided over the cooler 2.
  • 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 will be introduced: the internal combustion engine speed n, the target coolant temperature T set, the throttle angle DK, the vehicle speed v, the outside temperature T A and / or the vehicle power supply battery U b.
  • 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 and via the second correction map K K2 a second correction value T I is specified for the I component of the PID controller 4, 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 .
  • 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.
  • the actual coolant temperature T ist is plotted against the 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 pilot control signal value T VSW of the basic characteristic map K G is used to determine the control signal variable PWM.
  • 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 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.
  • the exemplary embodiment according to the invention optimizes the rules created by depending on the information available a very quick and precise setting of the operating parameters predetermined target coolant temperature is possible.
  • the invention is not limited to the exemplary embodiment mentioned. So instead of the thermostatic valve 3 or additionally as an electrically or electronically controllable actuator z. B. a coolant supply pump provided in the coolant circuit can be regulated according to the invention - or an electrically controllable coolant throttle valve. Basically, the invention covers every actuator that can be controlled electrically or electronically to influence the coolant temperature. Furthermore, 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. an adjustment-proportional voltage signal or a frequency-modulated pulse.
  • a variable influenced by the coolant temperature can take place the coolant temperature itself, for example, be a different temperature, such as B. that of a coolant-flowed component.

Claims (3)

  1. Installation de refroidissement à régulateur électronique (4) pour influencer la température du fluide de refroidissement d'un moteur à combustion interne équipant un véhicule automobile selon laquelle le régulateur (4) est monté en amont d'un organe d'actionnement (3) à commande électrique et au moins en fonction d'une grandeur Trel influencée par la température du fluide de refroidissement on génère une grandeur de signal de réglage (PWM) pour commander l'organe d'actionnement et atteindre une température de consigne de fluide de refroidissement Tcons,
    caractérisée en ce que
    le régulateur est un régulateur PID ou un régulateur PI, et on mémorise dans le régulateur un champ de caractéristiques de base (KG) prédéfinissant une valeur de commande préalable (Tvsw) en tenant compte d'au moins un paramètre de fonctionnement (n, Trel), et au moins un champ de caractéristiques de correction (Kk1, Kk2) par lequel on prédétermine une valeur de correction (Tp, Ti) pour la composante P et/ou pour la composante I du régulateur (4), en tenant compte de la différence de régulation Tcons - Trel.
  2. Installation de refroidissement selon la revendication 1,
    caractérisée en ce que
    pour déterminer les paramètres du régulateur (4) on additionne les valeurs (Tvsw, Tp, Ti) du champ de caractéristiques de base (KG) et du champ de caractéristiques de correction (Kk1, Kk2).
  3. Installation de refroidissement selon la revendication 1 ou 2,
    caractérisée en ce que
    la grandeur du signal de réglage PWM est un signal à modulation de largeur d'impulsion.
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 EP0744539A2 (fr) 1996-11-27
EP0744539A3 EP0744539A3 (fr) 1997-08-27
EP0744539B1 true EP0744539B1 (fr) 2003-01-02

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EP96105513A Expired - Lifetime EP0744539B1 (fr) 1995-05-26 1996-04-06 Système de refroidissement avec un actuateur commandé électriquement

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

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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
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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
EP2297501B1 (fr) * 2008-06-17 2018-05-02 Melling Tool Company Appareil et procédé de régulation de température pour système de refroidissement d'automobile
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
US10010013B2 (en) 2015-12-21 2018-06-26 Dell Products, L.P. Scalable rack-mount air-to-liquid heat exchanger
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
US9839164B2 (en) 2015-12-21 2017-12-05 Dell Products, L.P. Rack information handling system having modular liquid distribution (MLD) conduits
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
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
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Also Published As

Publication number Publication date
US5758607A (en) 1998-06-02
EP0744539A3 (fr) 1997-08-27
EP0744539A2 (fr) 1996-11-27
DE59610017D1 (de) 2003-02-06
DE19519377A1 (de) 1996-11-28

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