EP0664383B1 - Kühlanlage für eine Brennkraftmaschine - Google Patents
Kühlanlage für eine Brennkraftmaschine Download PDFInfo
- Publication number
- EP0664383B1 EP0664383B1 EP95100448A EP95100448A EP0664383B1 EP 0664383 B1 EP0664383 B1 EP 0664383B1 EP 95100448 A EP95100448 A EP 95100448A EP 95100448 A EP95100448 A EP 95100448A EP 0664383 B1 EP0664383 B1 EP 0664383B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- combustion engine
- internal combustion
- coolant
- cooling system
- 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
Links
Images
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
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/36—Heat exchanger mixed 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
- F01P2070/00—Details
- F01P2070/04—Details using electrical heating elements
Definitions
- the invention relates to a cooling system for an internal combustion engine of a motor vehicle with a radiator and a thermostatic valve that controls the temperature of the coolant in a warm-up mode, a mixed mode and a cooler operation is controllable, the thermostatic valve contains an expansion element to reduce the coolant temperature is electrically heated.
- the thermostatic valve regulates the flow of the coolant between the internal combustion engine and the radiator such that during the warm-up operation that of the internal combustion engine coming coolants essentially bypassing the cooler through a short circuit to Internal combustion engine flows back that during mixed operation the coolant coming from the internal combustion engine partly through the cooler and partly through flows back through the short circuit to the internal combustion engine and that during the cooler operation that of the internal combustion engine coming coolant essentially through flows back through the radiator to the internal combustion engine.
- the electrical heating of the expansion element is used for Enlarging the opening cross section towards the radiator one by the temperature of the coolant in the area opening of the thermostatic valve.
- a cooling system for example from DE 30 18 682 A1.
- the cooling system is in an expansion element an electric heating resistor of a thermostatic valve arranged, the electrical energy through a stationary held working piston can be fed through.
- the feed the electrical energy takes place via a control device, the coolant temperature regulated by the thermostatic valve better than a normal thermostatic valve to be able to keep constant.
- the Actual coolant temperature measured and with a predetermined upper and with a predetermined lower temperature value compared. If the upper temperature value is reached, so the heating resistor with electrical energy supplied so that the thermostatic valve opens further, by an increased cooling capacity and thus a lowering of the Actual coolant temperature can be reached.
- German patent application P 43 24 178 is also a cooling system for one Internal combustion engine of a motor vehicle mentioned above Type described in which the expansion element such is designed so that the coolant temperature without heating of the expansion element in warm-up mode and / or in mixed operation to an upper limit temperature settles.
- the expansion element such is designed so that the coolant temperature without heating of the expansion element in warm-up mode and / or in mixed operation to an upper limit temperature settles.
- There is a control unit in this cooling system provided, depending on the detected operating and / or Environmental variables of the combustion engine heating the Expansion element releases if necessary to the mode of operation the cooling system from warm-up mode or from mixed mode the upper working limit temperature towards mixed operation or cooling operation against the upper working limit temperature lower coolant temperature relocate.
- the expansion element in this cooling system of the thermostatic valve depending on the detected operating and / or environmental variables of the internal combustion engine is used to control the heating of the expansion element an electronic control unit is required in of the detected operating and / or environmental variables of the internal combustion engine processed in a suitable manner and Control of the heating of the expansion element used will.
- the invention has for its object a cooling system of the type mentioned at the outset, as simple as possible, that the operation of the internal combustion engine with respect optimized fuel consumption and emissions can be without in the event of an increased power requirement the performance of the internal combustion engine is reduced is.
- the upper working limit temperature is preferably the same the most economical operating temperature of the internal combustion engine and is slightly smaller than the maximum permissible operating temperature of the internal combustion engine. Preferably is the upper working limit temperature 100 ° C, especially at approx. 105 ° C.
- the maximum allowable Operating temperature is the highest possible temperature, with that the internal combustion engine in normal operation for longer Time can be operated without problems. This will even if the electrical heating of the expansion element fails damage to the internal combustion engine prevented.
- the maximum permissible operating temperature is usually between 105 ° C and 120 ° C.
- the cooling system in normal operation, d. H. not with increased performance requirements, such as e.g. B. in full load operation of the internal combustion engine or at Ascent of the engine driven by the internal combustion engine Motor vehicle, the highest possible operating temperature of the internal combustion engine reached.
- the power consumption of the Internal combustion engine lower, which increases fuel consumption lower and improve the exhaust gas composition leaves.
- a temperature switch which depends on the on or near the radiator outlet detected coolant temperature electrical energy feeds the heatable expansion element in the sense that increased cooling capacity by opening the Thermostatic valve is obtained and thus a reduced Coolant temperature is reached quickly. Too high Coolant or internal combustion engine temperatures at elevated Performance requirement would be reduced Degree of filling and thus a reduced performance of the Lead internal combustion engine.
- the expansion element can be heated, for example time-controlled after a certain predetermined time be switched off again.
- a two-point switch is provided as a temperature switch, whose upper switching point is in the range of 55 ° C to 75 ° C, preferably at 65 ° C and its lower Switching point minimum 5 ° C and maximum 50 ° C below the upper switching point.
- the Invention is the heating of the expansion element again turned off when on or near the radiator outlet detected coolant temperature the lower switching point of the two-point switch.
- the cooling system shown in Fig. 1 for an internal combustion engine 1 comprises a radiator 2. Between the internal combustion engine 1 and the cooler 2 is a coolant pump 3 arranged having a flow of the coolant in the Arrows shown direction generated. From the coolant outlet 4 of the internal combustion engine 1 leads a flow line 5 to the coolant inlet 6 of the radiator 2. From the coolant outlet or output 7 of the cooler 2 leads to Coolant inlet 8 of the internal combustion engine 1 has a return line 9. In the return line 9 is a thermostatic valve 10 with an expansion element, not shown here arranged. It is also in the return line 9 a temperature switch in the form of a two-point switch 11 provided.
- the two-point switch 11 controls the heating of the expansion element of the thermostatic valve 10 depending on the at or near the radiator outlet 7 detected coolant temperature by a electrical heating voltage U to a heating element of the expansion element of the thermostatic valve 10 is applied.
- the thermostatic valve 10 is also via a short-circuit line 12 connected to the flow line 5.
- the cooling system essentially works in three operating modes.
- a first mode of operation the so-called warm-up mode, especially after the cold start of the internal combustion engine 1, the thermostatic valve 10 is set so that the coolant coming from the internal combustion engine 1 Flow over the short-circuit line 12 essentially is completely returned to the internal combustion engine 1.
- the cooling system works in the Mixed operation, d. H. that coming from the internal combustion engine 1 Coolant runs partly through the cooler 2 and partly via the short-circuit line 12 back to the internal combustion engine 1.
- Cooling system in cooler mode d. H. that of the internal combustion engine 10 coming coolant will be essentially complete through the radiator 2 to the internal combustion engine 1 returned.
- the cooling system can be operated by heating the Expansion element of the thermostatic valve 10 by control via an electrical line 13 through which the Thermostatic valve 10 with the two-point switch 11 electrically connected, adjusted in the direction of cooler operation or switched completely to cooler operation will. This reduces the temperature level of the Coolant compared to that with an operation without Heating of the expansion element reached the temperature level. Then the heating of the expansion element of the thermostatic valve 10 by activation by the Two-point switch 11 via the electrical line 13 again interrupted, so the cooler coolant cools the expansion element of the thermostatic valve 10 until it assumes a regulated end position in mixed operation, so that the coolant temperature returns to a final temperature is raised.
- the regulated final temperature in Mixed operation is at the upper working limit temperature fixed.
- the supply of the thermostatic valve 10 with electrical Energy is generated by the two-point temperature switch 11 via the electrical line 13 depending on the at or in the vicinity of the cooler outlet 7 detected coolant temperature controlled. Because the coolant temperature at or near the radiator outlet 7 in a very good approximation Shows the load state of the internal combustion engine 1, this coolant temperature is suitable at or near the cooler outlet 7 is very good for controlling the heating of the expansion element of the thermostatic valve 10. This is the basis for the control of the heating of the Expansion element of the thermostatic valve in constructive very simple and therefore very inexpensive way a simple temperature switch, preferably one Two-point temperature switch can be done. It is with it not required, different company and / or environmental sizes of the internal combustion engine 1 to detect and in an expensive electronic control unit for control heating of the expansion element of the thermostatic valve 10 to process.
- Fig. 2 is the coolant temperature in a diagram T over time t at full load of the internal combustion engine 1 (Fig. 1) shown as it is by means of the invention Cooling system can be reached.
- the expansion element the thermostatic valve 10 (Fig. 1) is for example due to the composition of the expansion material designed upper working limit temperature, for example here a cooling temperature of approx. 105 ° C in the regulated Mixed operation corresponds.
- This coolant temperature of approx. 105 ° C is only possible in partial load operation of the internal combustion engine, where it is appropriate is, by reducing friction, fuel consumption to reduce and at the same time the exhaust gas composition to improve.
- the coolant temperature to optimize consumption always as hot as possible but with performance requirements in the full load range as cool as possible to improve cylinder filling be.
- the expansion element of the thermostatic valve 10 is designed so that the possible adjustment path of the thermostatic valve or the maximum possible opening cross section is not yet set at about 105 ° C.
- the expansion element of the thermostatic valve 10 (FIG. 1) can be heated in such a way that a maximum opening cross-section to the cooler is set in order to reduce the coolant temperature as quickly as possible, thereby completely switching to cooler operation.
- the full load operation is detected in the cooling system according to the invention by the temperature switch in the form of the two-point switch 11 (FIG. 1). If, due to a heavy load on the internal combustion engine, the coolant temperature at or in the vicinity of the radiator outlet 7 (FIG. 1), as shown in FIG.
- the cooling system according to the invention is based on the knowledge that that the coolant temperature at or near the Output 7 of the cooler 2 in a very good approximation represents for the load of the internal combustion engine 1. This finding is in the cooling system according to the invention used in that on or in the immediate vicinity the output 7 of the cooler 2, a temperature switch in Form of a two-point switch 11 is provided, which load-dependent heating of the expansion element of the Thermostat valves 10 in full load operation of the internal combustion engine 1 controls. With this simple type of control heating of the expansion element of the thermostatic valve 10 can rely on the cost-intensive recording of the operating and environmental variables of the internal combustion engine 1 and also dispenses with an expensive electronic control unit will.
- the cooling system according to the invention is suitable therefore especially for motor vehicles of the lower Price segment.
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)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Description
- Fig. 1
- eine erfindungsgemäße Kühlanlage für eine Brennkraftmaschine in schematischer Darstellung und
- Fig. 2 oben
- einen mit der erfindungsgemäßen Kühlanlage gewonnenen Verlauf der Kühlmitteltemperatur am Ausgang des Kühlers der Brennkraftmaschine sowie
- unten
- den dazugehörigen Heizspannungsverlauf für die Beheizung des Dehnstoffelementes des Thermostatventiles der erfindungsgemäßen Kühlanlage.
Claims (1)
- Kühlanlage für einen Verbrennungsmotor eines Kraftfahrzeuges mit einem Kühler und einem Thermostatventil, mit dem die Temperatur des Kühlmittels in einem Warmlaufbetrieb, einem Mischbetrieb und einem Kühlerbetrieb regelbar ist, wobei das Thermostatventil ein Dehnstoffelement enthält, das zum Reduzieren der Kühlmitteltemperatur elektrisch beheizbar ist,
dadurch gekennzeichnet, daß sich durch Auslegung des Dehnstoffelementes die Kühlmitteltemperatur ohne Beheizung des Dehnstoffelementes im Mischbetrieb auf eine obere Arbeitsgrenztemperatur einregelt und daß ein Temperaturschalter (11) vorgesehen ist, der abhängig von der am oder in Nähe des Kühlerausgangs (7) erfaßten Kühlmittelltemperatur (T) die Beheizung des Dehnstoffelementes bei Bedarf freigibt, um die Betriebsweise der Kühlanlage zum Kühlerbetrieb hin zu verlagern, wobei
der Temperaturschalter (11) ein Zweipunktschalter ist, dessen oberer Schaltpunkt im Bereich von 55°C bis 75°C, vorzugsweise bei 65°C liegt und dessen unterer Schaltpunkt minimal 5°C und maximal 50°C unterhalb des oberen Schaltpunktes liegt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4401620 | 1994-01-20 | ||
DE4401620A DE4401620A1 (de) | 1994-01-20 | 1994-01-20 | Kühlanlage für einen Verbrennungsmotor eines Kraftfahrzeuges mit einem Thermostatventil, das ein elektrisch beheizbares Dehnstoffelement enthält |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0664383A1 EP0664383A1 (de) | 1995-07-26 |
EP0664383B1 true EP0664383B1 (de) | 1998-09-09 |
Family
ID=6508338
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95100448A Expired - Lifetime EP0664383B1 (de) | 1994-01-20 | 1995-01-13 | Kühlanlage für eine Brennkraftmaschine |
Country Status (4)
Country | Link |
---|---|
US (1) | US5555854A (de) |
EP (1) | EP0664383B1 (de) |
DE (2) | DE4401620A1 (de) |
ES (1) | ES2127949T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101737143B (zh) * | 2009-11-30 | 2012-05-09 | 中国广东核电集团有限公司 | 一种控制电机冷却系统启动的系统 |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19504893B4 (de) * | 1995-02-14 | 2004-12-30 | Bayerische Motoren Werke Ag | Kühlmitteltemperatur-Regelsystem für die Kühlanlage eines Verbrennungsmotors |
US5657722A (en) * | 1996-01-30 | 1997-08-19 | Thomas J. Hollis | System for maintaining engine oil at a desired temperature |
US5582138A (en) * | 1995-03-17 | 1996-12-10 | Standard-Thomson Corporation | Electronically controlled engine cooling apparatus |
DE19606202B4 (de) * | 1996-02-21 | 2010-07-01 | Behr Thermot-Tronik Gmbh | Kühlsystem für einen Verbrennungsmotor |
IT1291190B1 (it) * | 1997-03-13 | 1998-12-29 | Gate Spa | Sistema di raffreddamento per un motore a combustione interna, particolarmente per autoveicoli |
DE19725222A1 (de) * | 1997-06-15 | 1998-12-17 | Behr Thermot Tronik Gmbh & Co | Thermostatventil |
JPH11294163A (ja) * | 1998-04-07 | 1999-10-26 | Nippon Thermostat Kk | 内燃機関の冷却制御装置 |
DE10016405A1 (de) * | 2000-04-01 | 2001-10-11 | Bosch Gmbh Robert | Kühlkreislauf |
US6595165B2 (en) | 2000-11-06 | 2003-07-22 | Joseph Fishman | Electronically controlled thermostat |
CA2325168A1 (en) | 2000-11-06 | 2002-05-06 | Joseph Fishman | Electronically controlled thermostat |
KR100589140B1 (ko) * | 2003-09-20 | 2006-06-12 | 현대자동차주식회사 | 차량의 냉각시스템 제어방법 |
US7171955B2 (en) * | 2003-10-20 | 2007-02-06 | Perkins Michael T | Flowing fluid conditioner |
US8215381B2 (en) * | 2009-04-10 | 2012-07-10 | Ford Global Technologies, Llc | Method for controlling heat exchanger fluid flow |
JP2017078346A (ja) * | 2015-10-20 | 2017-04-27 | いすゞ自動車株式会社 | ディーゼルエンジン |
FR3088960B1 (fr) * | 2018-11-23 | 2023-12-29 | Psa Automobiles Sa | Procede de limitation d’une temperature de fluide de refroidissement d’un moteur thermique |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0640753A1 (de) * | 1993-07-19 | 1995-03-01 | Bayerische Motoren Werke Aktiengesellschaft | Kühlanlage für einen Brennkraftmaschine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2816711A (en) * | 1955-07-07 | 1957-12-17 | James A Woods | Temperature control of coolant circulation |
FR2456838A1 (fr) * | 1979-05-18 | 1980-12-12 | Sev Marchal | Vanne a action thermostatique destinee a un circuit de refroidissement de moteur a combustion interne |
DE3315308A1 (de) * | 1983-04-27 | 1984-10-31 | Gustav Wahler Gmbh U. Co, 7300 Esslingen | Kuehlwasserregler fuer brennkraftmaschinen |
DE3347002C1 (de) * | 1983-12-24 | 1985-05-15 | Bayerische Motoren Werke AG, 8000 München | Temperaturregler-Einsatz fuer den Kuehlkreis fluessigkeitsgekuehlter Brennkraftmaschinen |
JPS63124821A (ja) * | 1986-11-14 | 1988-05-28 | Mazda Motor Corp | エンジンの冷却装置 |
DE3705232C2 (de) * | 1987-02-19 | 1996-01-18 | Wahler Gmbh & Co Gustav | Verfahren und Einrichtung zur Temperaturregelung des Kühlmittels von Brennkraftmaschinen |
EP0557113B1 (de) * | 1992-02-19 | 1999-05-26 | Honda Giken Kogyo Kabushiki Kaisha | Maschinenkühlanlage |
-
1994
- 1994-01-20 DE DE4401620A patent/DE4401620A1/de not_active Withdrawn
-
1995
- 1995-01-13 EP EP95100448A patent/EP0664383B1/de not_active Expired - Lifetime
- 1995-01-13 ES ES95100448T patent/ES2127949T3/es not_active Expired - Lifetime
- 1995-01-13 DE DE59503471T patent/DE59503471D1/de not_active Expired - Fee Related
- 1995-01-20 US US08/376,560 patent/US5555854A/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0640753A1 (de) * | 1993-07-19 | 1995-03-01 | Bayerische Motoren Werke Aktiengesellschaft | Kühlanlage für einen Brennkraftmaschine |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101737143B (zh) * | 2009-11-30 | 2012-05-09 | 中国广东核电集团有限公司 | 一种控制电机冷却系统启动的系统 |
Also Published As
Publication number | Publication date |
---|---|
DE4401620A1 (de) | 1995-07-27 |
DE59503471D1 (de) | 1998-10-15 |
ES2127949T3 (es) | 1999-05-01 |
EP0664383A1 (de) | 1995-07-26 |
US5555854A (en) | 1996-09-17 |
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