WO2001012964A1 - Verfahren zur temperaturregelung des kühlmittels eines verbrennungsmotors mittels einer elektrisch betriebenen kühlmittelpumpe - Google Patents
Verfahren zur temperaturregelung des kühlmittels eines verbrennungsmotors mittels einer elektrisch betriebenen kühlmittelpumpe Download PDFInfo
- Publication number
- WO2001012964A1 WO2001012964A1 PCT/DE2000/002373 DE0002373W WO0112964A1 WO 2001012964 A1 WO2001012964 A1 WO 2001012964A1 DE 0002373 W DE0002373 W DE 0002373W WO 0112964 A1 WO0112964 A1 WO 0112964A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- engine
- coolant pump
- internal combustion
- coolant
- Prior art date
Links
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
- F01P7/02—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
-
- 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
-
- 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
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
- F01P11/0204—Filling
-
- 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
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/02—Liquid-coolant filling, overflow, venting, or draining devices
- F01P11/0285—Venting devices
-
- 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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
- F01P2005/125—Driving auxiliary pumps electrically
-
- 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
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/13—Ambient 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
- F01P2025/08—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
- F01P2031/00—Fail safe
- F01P2031/22—Fail safe using warning lamps
-
- 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
- F01P2031/00—Fail safe
- F01P2031/30—Cooling after the engine is stopped
-
- 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
- F01P2037/00—Controlling
- F01P2037/02—Controlling starting
Definitions
- the invention relates to a method for regulating the temperature of the coolant of an internal combustion engine, which is connected to a cooler via at least one flow and return line, and to a coolant pump according to the preamble of the main claim.
- DE 37 05 232 C2 proposes a method for regulating the temperature of the coolant, in which a sensor actuates a servomotor which opens or opens a bypass valve or the like, depending on individual map parameters, for example the speed and / or the load on the internal combustion engine closes in order to achieve a predetermined temperature value in the engine cooling circuit.
- the sensor is heated by means of a heating device in accordance with the specified characteristics, so that it can emit a corresponding signal to the servomotor.
- the inventive method for temperature control of the coolant of an internal combustion engine with the characterizing features of claim 1 has the advantage that the speed of the coolant pump itself is regulated or controlled so that its speed is only in accordance with the heat to be dissipated.
- the engine warm-up phase can advantageously be controlled in a simple manner.
- the specification of the target temperature through a time table appears to be particularly favorable, since it enables particularly simple adaptation to different engine types and your cooling circuits.
- the control signal for the coolant pump can be controlled particularly simply and advantageously. It is considered a further advantage that in addition to controlling the coolant pump, further valves, for example the thermostatic valve, the heating valve or a motor fan, are activated in order to optimize the cooling capacity. This additional influence on the coolant circuit can be used to either warm up the engine faster in the cold start phase or to dissipate the excess heat more quickly when the engine is under high load and is switched off. This reduces exhaust gas pollution and prevents thermal overloading of the engine.
- the parameters are linked step by step according to the type of fuzzy logic in order to ensure optimal temperature conditions for the internal combustion engine.
- a control signal can be generated for the coolant pump, which takes into account all operating conditions that occur.
- FIG. 1 shows a schematic structure of a coolant circuit of an internal combustion engine and Figure 2 shows a block diagram for the temperature control.
- the internal combustion engine 1 is connected to a cooler 4 via a flow line 7 via an electrically operated coolant pump M and a thermostatic valve 2.
- a flow sensor 6a for detecting the flow temperature is attached to the flow line 7 at a suitable point.
- the current temperature of the internal combustion engine 1 is measured with a temperature sensor 6.
- a return line 8 connects the radiator 4 to the cooling circuit of the internal combustion engine 1 via a heating valve 3.
- the heating valve 3 is also connected to the heater 5 of the passenger compartment.
- the thermostatic valve 2 is connected to the return line 8 via a further valve and the bypass line 9.
- the cooler is thermally coupled to one or more motor fans 10, wherein the motor fan 10 can be designed for several speed levels.
- the valves 2, 3 are designed as 3-way valves.
- Position 11 is a setpoint generator for the motor temperature, which is specified, for example, as a function of time or in the form of a table.
- the current engine temperature which was measured with the temperature sensor 6, is processed in a suitable manner and passed on to the summer 14.
- the difference signal between the setpoint transmitter 11 and the block 12 forms a correction variable for the control signal for the coolant pump M in block 13.
- the PID controller signal of block 13 is now taken into account in summer 15. view of further parameters for the control of the coolant pump, which are supplied by block 16, added.
- the further parameters are, for example, values for the engine speed, the current engine load of the internal combustion engine, the vehicle speed, the intake or outside temperature, the engine temperature itself and / or the on-board voltage. This is symbolically represented by the parallel arrows on block 16.
- the control signal for the coolant pump M is formed in block 15.
- the coolant pump M runs at the corresponding speed and thus causes a corresponding change in the speed of the coolant flow m in the supply line 7 or the return line 8.
- block 17 follows Corresponding evaluation of the current engine temperature (block 12) and the control signal for the coolant pump, a control of the thermostatic valve 2, the multi-stage engine fan 10 or the control of a warning display on the dashboard. These elements are symbolically indicated by the parallel arrows of block 17.
- a device is provided in block 18 with which the coolant pump M can be driven separately.
- This block 18 therefore contains suitable devices, for example for connecting a workshop tester which drives the coolant pump M when filling and venting the cooling system.
- the internal combustion engine can also be warmed up by means of an auxiliary heater (not shown in the drawing) via this line. Furthermore, it is provided, via this line, the actuation of the coolant pump M to prevent To control overheating after switching off the hot internal combustion engine 1.
- the blocks shown in FIG. 2 are designed as known components (e.g. PID controller, temperature sensor, etc.). The easiest way to link is through an appropriate program.
- Table 2 shows an example of the measures that are taken to reduce the cooling capacity. If the motor temperature tmot ⁇ 105 ° C and the cooling capacity ⁇ 80%, the warning indicator "overheating" is switched off. Accordingly, at motor temperatures ⁇ 97 ° C and ⁇ 80% cooling capacity or 60% cooling capacity, fans stage 2 and 1 are switched off. If the temperature continues to drop, for example tmot ⁇ than 83 ° C. and a cooling capacity ⁇ 40%, the valve 2 is switched so that the cooler 4 is now suspended, so that the bypass line 9 leads to the return flow to the internal combustion engine 1 Thermostat valve 2 also closes at temperatures below 75 ° C, so that the motor quickly follows the specified temperature curve is heated. Rapid heating of the internal combustion engine 1 has the advantage that the harmful exhaust gases are reduced as quickly as possible in the warm-up phase.
Landscapes
- 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)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/807,792 US6662761B1 (en) | 1999-08-18 | 2000-07-21 | Method for regulating the temperature of the coolant in an internal combustion engine using an electrically operated coolant pump |
EP00952940A EP1121516A1 (de) | 1999-08-18 | 2000-07-21 | Verfahren zur temperaturregelung des kühlmittels eines verbrennungsmotors mittels einer elektrisch betriebenen kühlmittelpumpe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19939138A DE19939138A1 (de) | 1999-08-18 | 1999-08-18 | Verfahren zur Temperaturregelung des Kühlmittels eines Verbrennungsmotors mittels einer elektrisch betriebenen Kühlmittelpumpe |
DE19939138.6 | 1999-08-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001012964A1 true WO2001012964A1 (de) | 2001-02-22 |
Family
ID=7918774
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/002373 WO2001012964A1 (de) | 1999-08-18 | 2000-07-21 | Verfahren zur temperaturregelung des kühlmittels eines verbrennungsmotors mittels einer elektrisch betriebenen kühlmittelpumpe |
Country Status (4)
Country | Link |
---|---|
US (1) | US6662761B1 (de) |
EP (1) | EP1121516A1 (de) |
DE (1) | DE19939138A1 (de) |
WO (1) | WO2001012964A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10206297A1 (de) * | 2002-02-15 | 2003-09-04 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine |
WO2014080278A3 (en) * | 2012-11-20 | 2014-07-24 | Toyota Jidosha Kabushiki Kaisha | Cooler apparatus and control method therefor |
DE102018207832A1 (de) * | 2018-05-18 | 2019-11-21 | Bayerische Motoren Werke Aktiengesellschaft | Kühlmittelkreislauf für eine Brennkraftmaschine |
Families Citing this family (16)
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 |
DE10154091A1 (de) * | 2001-11-02 | 2003-05-15 | Bayerische Motoren Werke Ag | Verfahren und Vorrichtung zur Regelung eines Kühlsystems einer Verbrennungskraftmaschine |
EP1458965A1 (de) * | 2001-11-30 | 2004-09-22 | Delphi Technologies, Inc. | Zylinderdeaktivierung zur verbesserung der fahrzeuginnenheizung |
DE10163944A1 (de) * | 2001-12-22 | 2003-07-03 | Bosch Gmbh Robert | Verfahren zur Ansteuerung von elektrisch betätigbaren Komponenten eines Kühlsystems, Computerprogramm, Steuergerät, Kühlsystem und Brennkraftmaschine |
JP3466177B2 (ja) * | 2002-01-09 | 2003-11-10 | 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 |
US7523725B2 (en) | 2002-04-15 | 2009-04-28 | Robert Bosch Gmbh | Method for controlling and/or regulating a cooling system of a motor vehicle |
DE10224063A1 (de) * | 2002-05-31 | 2003-12-11 | Daimler Chrysler Ag | Verfahren zur Wärmeregulierung einer Brennkraftmaschine für Fahrzeuge |
DE10343775B4 (de) * | 2003-09-18 | 2014-09-18 | Volkswagen Ag | Leistungsbedarfsgesteuertes Kühl- und Heizsystem für Kraftfahrzeuge mit unabhängig von der Brennkraftmaschine antreibbarer Fördervorrichtung |
GB2425619B (en) * | 2005-03-22 | 2007-05-02 | Visteon Global Tech Inc | Method of engine cooling |
US8430068B2 (en) * | 2007-05-31 | 2013-04-30 | James Wallace Harris | Cooling system having inlet control and outlet regulation |
US20090183696A1 (en) * | 2008-01-18 | 2009-07-23 | O'flynn Kevin P | Liquid cooling system for internal combustion engine |
FR2944238B1 (fr) * | 2009-04-09 | 2011-05-06 | Renault Sas | Dispositif de refroidissement pour vehicule automobile |
FR2944235B1 (fr) | 2009-04-09 | 2012-10-19 | Renault Sas | Dispositif de refroidissement pour vehicule automobile |
US9416720B2 (en) * | 2011-12-01 | 2016-08-16 | Paccar Inc | Systems and methods for controlling a variable speed water pump |
CN110805487B (zh) * | 2019-01-24 | 2020-10-27 | 长城汽车股份有限公司 | 一种发动机电子水泵的控制方法和系统 |
CN114483283B (zh) * | 2022-01-21 | 2024-01-12 | 重庆长安汽车股份有限公司 | 基于tmm的整车水温控制方法、系统及车辆 |
Citations (7)
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DE3810174A1 (de) * | 1988-03-25 | 1989-10-05 | Hella Kg Hueck & Co | Einrichtung zur regelung der kuehlmitteltemperatur einer brennkraftmaschine, insbesondere in kraftfahrzeugen |
US5036803A (en) * | 1987-11-12 | 1991-08-06 | Robert Bosch Gmbh | Device and method for engine cooling |
EP0557113A2 (de) * | 1992-02-19 | 1993-08-25 | Honda Giken Kogyo Kabushiki Kaisha | Maschinenkühlanlage |
DE3705232C2 (de) | 1987-02-19 | 1996-01-18 | Wahler Gmbh & Co Gustav | Verfahren und Einrichtung zur Temperaturregelung des Kühlmittels von Brennkraftmaschinen |
EP0731260A1 (de) * | 1995-03-08 | 1996-09-11 | Volkswagen Aktiengesellschaft | Verfahren zur Regelung eines Kühlkreislaufes eines Verbrennungskraftmotors |
DE29900023U1 (de) * | 1999-01-04 | 1999-07-15 | Riedl, Heinrich, 90409 Nürnberg | Änderung der Kühlanlagen für Verbrennungsmotoren zur Erhöhung der Sicherheit |
EP0965737A2 (de) * | 1998-06-17 | 1999-12-22 | Siemens Canada Limited | Regelsystem für totale Kühlung einer Brennkraftmaschine |
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US4019489A (en) * | 1974-12-09 | 1977-04-26 | George Bowen Cartmill | Safety apparatus for engines |
JPS6036717A (ja) * | 1983-08-10 | 1985-02-25 | Toyota Motor Corp | エンジン冷却水温度制御装置 |
US5521581A (en) * | 1993-08-05 | 1996-05-28 | Proulx; Raymond A. | Fluid level and temperature monitor and alarm system for an automobile cooling system |
-
1999
- 1999-08-18 DE DE19939138A patent/DE19939138A1/de not_active Withdrawn
-
2000
- 2000-07-21 WO PCT/DE2000/002373 patent/WO2001012964A1/de not_active Application Discontinuation
- 2000-07-21 EP EP00952940A patent/EP1121516A1/de not_active Withdrawn
- 2000-07-21 US US09/807,792 patent/US6662761B1/en not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3705232C2 (de) | 1987-02-19 | 1996-01-18 | Wahler Gmbh & Co Gustav | Verfahren und Einrichtung zur Temperaturregelung des Kühlmittels von Brennkraftmaschinen |
US5036803A (en) * | 1987-11-12 | 1991-08-06 | Robert Bosch Gmbh | Device and method for engine cooling |
DE3810174A1 (de) * | 1988-03-25 | 1989-10-05 | Hella Kg Hueck & Co | Einrichtung zur regelung der kuehlmitteltemperatur einer brennkraftmaschine, insbesondere in kraftfahrzeugen |
EP0557113A2 (de) * | 1992-02-19 | 1993-08-25 | Honda Giken Kogyo Kabushiki Kaisha | Maschinenkühlanlage |
EP0731260A1 (de) * | 1995-03-08 | 1996-09-11 | Volkswagen Aktiengesellschaft | Verfahren zur Regelung eines Kühlkreislaufes eines Verbrennungskraftmotors |
EP0965737A2 (de) * | 1998-06-17 | 1999-12-22 | Siemens Canada Limited | Regelsystem für totale Kühlung einer Brennkraftmaschine |
DE29900023U1 (de) * | 1999-01-04 | 1999-07-15 | Riedl, Heinrich, 90409 Nürnberg | Änderung der Kühlanlagen für Verbrennungsmotoren zur Erhöhung der Sicherheit |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10206297A1 (de) * | 2002-02-15 | 2003-09-04 | Bosch Gmbh Robert | Verfahren zum Betreiben einer Brennkraftmaschine |
US7225764B2 (en) | 2002-02-15 | 2007-06-05 | Robert Bosch Gmbh | Method for operating a combustion engine |
WO2014080278A3 (en) * | 2012-11-20 | 2014-07-24 | Toyota Jidosha Kabushiki Kaisha | Cooler apparatus and control method therefor |
CN104350254A (zh) * | 2012-11-20 | 2015-02-11 | 丰田自动车株式会社 | 冷却设备及其控制方法 |
US9581076B2 (en) | 2012-11-20 | 2017-02-28 | Toyota Jidosha Kabushiki Kaisha | Cooler apparatus and control method therefor |
DE102018207832A1 (de) * | 2018-05-18 | 2019-11-21 | Bayerische Motoren Werke Aktiengesellschaft | Kühlmittelkreislauf für eine Brennkraftmaschine |
Also Published As
Publication number | Publication date |
---|---|
US6662761B1 (en) | 2003-12-16 |
EP1121516A1 (de) | 2001-08-08 |
DE19939138A1 (de) | 2001-02-22 |
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