EP0744538A2 - 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
EP0744538A2
EP0744538A2 EP96105511A EP96105511A EP0744538A2 EP 0744538 A2 EP0744538 A2 EP 0744538A2 EP 96105511 A EP96105511 A EP 96105511A EP 96105511 A EP96105511 A EP 96105511A EP 0744538 A2 EP0744538 A2 EP 0744538A2
Authority
EP
European Patent Office
Prior art keywords
actuator
coolant temperature
cooling system
internal combustion
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.)
Withdrawn
Application number
EP96105511A
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German (de)
English (en)
Other versions
EP0744538A3 (fr
Inventor
Zlatko Ovari
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 EP0744538A2 publication Critical patent/EP0744538A2/fr
Publication of EP0744538A3 publication Critical patent/EP0744538A3/fr
Withdrawn legal-status Critical Current

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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
    • 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

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 coming partly through the cooler and partly 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.
  • the electrical heating of the electrically controllable actuator increases the opening cross section for the flow of the coolant to the cooler 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.
  • a cooling system is known, for example, from DE 44 03 713, which has not yet been published, and whose electrically controllable actuator for influencing the coolant temperature is an electrically controllable coolant feed pump.
  • electrically controllable actuator for influencing the coolant temperature is an electrically controllable coolant feed pump.
  • no control strategy is described for this.
  • the parameters of the controller are determined adaptively during internal combustion engine operation by evaluating the step response of a variable proportional to the actual coolant temperature in response to step excitation as the input signal of the actuator.
  • 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.
  • variable influenced by the coolant temperature or the variable proportional to the actual coolant temperature can also be the (actual) coolant temperature itself.
  • the controller simulates the transmission path between the input of the actuator and the output of the cooling system, as a result of which the parameters of the controller are automatically adjusted as a function of all the parameters occurring in this transmission path, such as B. from the vehicle speed, the outside temperature, the engine load, the vehicle interior heating, the condition of the air conditioning units, the speed of the radiator water fan and / or the temperature detection with dead time as well as the inertia and non-linearity of the actuator. Additional sensors for recording these parameters are not necessary. This not only optimizes the control but also saves additional costs.
  • An advantageous embodiment of the invention is the subject of claim 2.
  • the jump excitation is carried out by the control signal size for controlling the actuator itself.
  • the control signal variable contains at least partially a jump signal component, according to the invention, it is not necessary to generate a separate test signal as a jump stimulus in order to determine the jump response.
  • the step response is preferably evaluated in the presence of a specific operating condition.
  • control signal size is a pulse-width-modulated signal.
  • a pulse-width modulated signal on the one hand a finely tuned control of the control signal is possible and on the other hand a jump excitation for evaluating the step response is often available automatically.
  • An internal combustion engine 1 contains coolant-carrying lines. These coolant-carrying lines are connected from the output A of the internal combustion engine 1 via a line to an input of an electrically controllable actuator 3 in the form of a thermostatic valve. An output of the actuator 3 is connected via a further line and the input E of the internal combustion engine 1 to the coolant-carrying lines of the internal combustion engine 1. Another output of the actuator 3 leads via a line to the input of a cooler 2. The output of the cooler 2 is in turn connected to the input E of the internal combustion engine 1 via a coolant-carrying line.
  • the electrically controllable actuator in the form of a thermostatic valve has a temperature-dependent expansion element which can be heated via an electrical line which is connected to an electronic control unit 4.
  • an electronic control unit 4 For the functioning of the electrically controllable thermostatic valve 3, reference is made, for example, to DE 43 24 178 A1.
  • the actuator 3 is shown in warm-up mode, in which the left passage is completely closed and the right passage is fully open.
  • the coolant flows from the output A of the internal combustion engine 1 in a kind of short circuit via the actuator 3 directly back to the input E of the internal combustion engine 1.
  • the cooler is bypassed by the coolant.
  • the right passage would be completely closed and the left passage of the actuator 3 would be fully opened.
  • a mixing operation is possible, can be open in which both the right and the left passage of the actuator 3 in part.
  • the control signal size of the actuator 3 is a pulse width modulated control signal PWM.
  • the electronic control device 4 should be the controller according to the invention, preferably a PID controller.
  • the controller it is also possible to use the controller as a function block in an electronic device that is already present Control device, e.g. B. to control the internal combustion engine and / or the cooling system.
  • the PID controller 4 receives as input signals at least the actual coolant temperature T, and the specification of a target to be set coolant temperature T set.
  • a corresponding control signal PWM is generated as a control signal variable and output in the form of electrical heating of the actuator 3 by the PID controller 4.
  • control signal PWM is a pulse-width modulated signal
  • this control signal PWM itself can be used as step excitation SE '.
  • the pulse should have a predetermined minimum duration within the period t PWM .
  • a specially formed pulse e.g. B. with a predetermined duration t SE used.
  • Respect is actual coolant temperature T is the step response SA z, the step command SE or SE 'back. B. for a predetermined time, recorded and evaluated.
  • the parameters of the PID controller 4 are adapted to the conditions of the actuator 3 and / or the controlled system 5 in accordance with the evaluation of the step response SA.
  • the step response SA is evaluated, for example, with regard to its dead time T tot and / or its slope dT / dt. To evaluate the step response SA, however, other characteristics of the curve shape of the step response SA can also be considered.
  • the actuator 3 and / or the controlled system 5 are automatically taken into account. This results in an increase in the control quality and control speed, saving additional sensors for recording further operating parameters or disturbance variables. As a result
  • the cooling system according to the invention also results in consumption and performance optimization under given operating conditions.
  • 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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Temperature (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
EP96105511A 1995-05-26 1996-04-06 Système de refroidissement avec un actuateur commandé électriquement Withdrawn EP0744538A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19519378A DE19519378B4 (de) 1995-05-26 1995-05-26 Kühlanlage mit elektrisch regelbarem Stellglied
DE19519378 1995-05-26

Publications (2)

Publication Number Publication Date
EP0744538A2 true EP0744538A2 (fr) 1996-11-27
EP0744538A3 EP0744538A3 (fr) 1997-08-27

Family

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Family Applications (1)

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EP96105511A Withdrawn EP0744538A3 (fr) 1995-05-26 1996-04-06 Système de refroidissement avec un actuateur commandé électriquement

Country Status (3)

Country Link
US (1) US6422181B1 (fr)
EP (1) EP0744538A3 (fr)
DE (1) DE19519378B4 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001650A1 (fr) * 1997-07-03 1999-01-14 Daimlerchrysler Ag Procede de regulation thermique d'un moteur a combustion interne
EP1126142A3 (fr) * 2000-02-16 2003-03-12 Continental ISAD Electronic Systems GmbH & Co. oHG Système de refroidissement pour un véhicule automobile
FR2896271A1 (fr) * 2006-01-19 2007-07-20 Renault Sas Procede et dispositif de regulation de la temperature d'un moteur a combustion interne

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10123444B4 (de) * 2001-05-14 2006-11-09 Siemens Ag Regelanlage zum Regeln der Kühlmitteltemperatur einer Brennkraftmaschine
JP3978395B2 (ja) * 2002-01-23 2007-09-19 愛三工業株式会社 流量制御弁
JP3932277B2 (ja) * 2002-10-18 2007-06-20 日本サーモスタット株式会社 電子制御サーモスタットの制御方法
JP2004353602A (ja) * 2003-05-30 2004-12-16 Nippon Thermostat Co Ltd 電子制御サーモスタットの制御方法
DE10337412A1 (de) * 2003-08-14 2005-03-10 Daimler Chrysler Ag Verfahren zur Ansteuerung eines Thermostaten
KR100589140B1 (ko) * 2003-09-20 2006-06-12 현대자동차주식회사 차량의 냉각시스템 제어방법
DE102008016811B4 (de) * 2008-04-02 2016-03-17 Volkswagen Ag Verfahren und Vorrichtung zur Ansteuerung einer schaltbaren Kühlmittelpumpe
US8474419B2 (en) * 2008-06-17 2013-07-02 Melling Do Brasil Componentes Automotivos Ltds. Temperature control apparatus and method for an automotive cooling system
WO2011152827A1 (fr) * 2010-06-04 2011-12-08 International Engine Intellectual Property Company, Llc Moteur avec dispositif d'étranglement de fluide de refroidissement et son procédé de commande
US10190478B1 (en) * 2017-07-25 2019-01-29 GM Global Technology Operations LLC Controlling a cooling system for an internal combustion engine using feedback linearization

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPS638802A (ja) * 1986-06-27 1988-01-14 Matsushita Electric Ind Co Ltd Ｐｉｄ調節器の制御定数自動調整方法
EP0533498A1 (fr) * 1991-09-20 1993-03-24 Omron Corporation Régulateur P.I.D.
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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GB966379A (fr) * 1959-08-07
SE442921B (sv) * 1978-02-23 1986-02-03 Asea Ab Sjelvinstellande regulator
FR2554165B1 (fr) * 1983-10-28 1988-01-15 Marchal Equip Auto Procede de regulation de la temperature du liquide de refroidissement d'un moteur a combustion interne et dispositif pour sa mise en oeuvre
DE3535787A1 (de) * 1985-10-07 1987-04-09 Siemens Ag Verfahren zur bestimmung von regelstreckenparametern
US4930455A (en) * 1986-07-07 1990-06-05 Eaton Corporation Controlling engine coolant flow and valve assembly therefor
DE3705232C2 (de) * 1987-02-19 1996-01-18 Wahler Gmbh & Co Gustav Verfahren und Einrichtung zur Temperaturregelung des Kühlmittels von Brennkraftmaschinen
US4895301A (en) * 1988-03-09 1990-01-23 Robertshaw Controls Company Engine coolant system and method of making the same
DE3810174C2 (de) * 1988-03-25 1996-09-19 Hella Kg Hueck & Co Einrichtung zur Regelung der Kühlmitteltemperatur einer Brennkraftmaschine, insbesondere in Kraftfahrzeugen
DE4308541A1 (de) * 1993-03-17 1994-09-22 Bosch Gmbh Robert Verfahren und Vorrichtung zur Steuerung und/oder Regelung eines Stellgliedes
DE4448011B4 (de) * 1993-07-19 2011-09-15 Bayerische Motoren Werke Aktiengesellschaft Kühlanlage für einen Verbrennungsmotor eines Kraftfahrzeuges mit einem Thermostatventil, das ein elektrisch beheizbares Dehnstoffelement enthält
DE4329917A1 (de) * 1993-09-04 1995-03-09 Bosch Gmbh Robert Schaltungsanordnung zur getakteten Versorgung eines elektromagnetischen Verbrauchers

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS638802A (ja) * 1986-06-27 1988-01-14 Matsushita Electric Ind Co Ltd Ｐｉｄ調節器の制御定数自動調整方法
EP0533498A1 (fr) * 1991-09-20 1993-03-24 Omron Corporation Régulateur P.I.D.
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

Non-Patent Citations (1)

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Title
PATENT ABSTRACTS OF JAPAN vol. 012, no. 210 (P-717), 16.Juni 1988 & JP 63 008802 A (MATSUSHITA ELECTRIC IND CO LTD;OTHERS: 01), 14.Januar 1988, *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999001650A1 (fr) * 1997-07-03 1999-01-14 Daimlerchrysler Ag Procede de regulation thermique d'un moteur a combustion interne
US6343572B1 (en) 1997-07-03 2002-02-05 Daimlerchrysler Ag Method for regulating heat in an internal combustion engine
EP1126142A3 (fr) * 2000-02-16 2003-03-12 Continental ISAD Electronic Systems GmbH & Co. oHG Système de refroidissement pour un véhicule automobile
FR2896271A1 (fr) * 2006-01-19 2007-07-20 Renault Sas Procede et dispositif de regulation de la temperature d'un moteur a combustion interne
WO2007083065A2 (fr) * 2006-01-19 2007-07-26 Renault S.A.S Procede et dispositif de regulation de la temperature d'un moteur a combustion interne
WO2007083065A3 (fr) * 2006-01-19 2007-09-07 Renault Sa Procede et dispositif de regulation de la temperature d'un moteur a combustion interne
CN101384805B (zh) * 2006-01-19 2010-09-15 雷诺股份公司 用于调节内燃机温度的方法和设备

Also Published As

Publication number Publication date
US6422181B1 (en) 2002-07-23
EP0744538A3 (fr) 1997-08-27
DE19519378A1 (de) 1996-11-28
DE19519378B4 (de) 2011-06-30

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