WO2005017328A1 - Verfahren zur regulierung des kühlmittelflusses mit einem heizungsabsperrventil - Google Patents
Verfahren zur regulierung des kühlmittelflusses mit einem heizungsabsperrventil Download PDFInfo
- Publication number
- WO2005017328A1 WO2005017328A1 PCT/EP2004/008616 EP2004008616W WO2005017328A1 WO 2005017328 A1 WO2005017328 A1 WO 2005017328A1 EP 2004008616 W EP2004008616 W EP 2004008616W WO 2005017328 A1 WO2005017328 A1 WO 2005017328A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- coolant
- valve
- temperature
- shut
- coolant flow
- 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
-
- 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
- F01P2031/00—Fail safe
-
- 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
- F01P2031/32—Deblocking of damaged thermostat
-
- 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
-
- 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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/08—Cabin heater
Definitions
- the invention relates to the regulation of the coolant flow with a heating shut-off valve, in particular for a cooling system in a motor vehicle.
- the heating shut-off valve in the coolant channels of the engine block in cooperation with a three-way thermostat, causes standing coolant during the warm-up phase of the internal combustion engine, so that the warm-up phase of the internal combustion engine is as short as possible.
- the invention is based on a prior art, as is known for example from German patent application DE 100 12 197 AI.
- a shut-off valve in the coolant line between the engine block and the heating heat exchanger and a three-way valve for switching between large and small coolant circuits work together to shorten the warm-up phase of the internal combustion engine as much as possible.
- the waste heat from an air conditioning system is used to heat the coolant with the waste heat from the heating heat exchanger of the air conditioning system when the engine is still cold.
- the warming up of coolant from DE 100 12 197 AI has the disadvantage that it is only effective in connection with an air conditioning system and this only if the ambient conditions are such that an air conditioning system to a significant extent Waste heat generated due to cooling capacity. This is usually the case when starting a motor vehicle if the vehicle has been standing in the sun in summer. At warm ambient temperatures, however, the warm-up phase of an internal combustion engine is not too long, so compliance with emission limit values does not pose any problems in summer. These problems are exacerbated by cold ambient temperatures, such as those encountered in the northern hemisphere in winter. Then the air conditioning system does not produce any waste heat either, so that the above-mentioned heating of the coolant cannot be used when it is most needed.
- the solution is mainly achieved by controlling the valves in the three-way thermostat and in the heating shut-off valve.
- the valve position in the cooling system is selected so that during the warm-up phase of the engine until it has reached its operating temperature, the coolant in the cooling channels is brought to a standstill until the coolant temperature exceeds a predetermined reference value.
- the heating shut-off valve can be opened briefly when the coolant temperature has exceeded a flow threshold in order to allow preheated coolant to flow around the wax pill in the three-way thermostat. Then the coolant flow in the cooling channels of the internal combustion engine is prevented again until the operating threshold is reached. With the brief opening, the three-way thermostat is prepared for the imminent start-up as a thermostat for regulating the coolant temperature.
- overload protection to prevent local overheating in the internal combustion engine during the warm-up phase is realized. Siert.
- an expected coolant target temperature is calculated depending on the engine parameters, in particular depending on the applied load torque and the current engine speed. If the actual coolant setpoint temperature when the coolant is at a standstill, i.e. with the coolant channels blocked, is below the expected target temperature in the internal combustion engine despite a high load, this is an indication of a boundary layer formation in the cooling channels, which prevents heat transfer when the coolant is at a standstill. Then there is a risk of the internal combustion engine overheating.
- the coolant flow in the coolant channels is started, even if the coolant temperature has not yet reached the opening temperature for the shut-off valves.
- the wax pill can also be energized in the three-way thermostat in order to provide protection against overheating.
- FIG. 1 shows a diagram of a cooling system with the most important influencing parameters for controlling the heating shut-off valve
- FIG. 2 shows a flow control for preheating a three-way thermostat in the cooling circuit
- FIG. 3 shows a method for overload protection when the coolant is stationary in the cooling channels of the internal combustion engine
- FIG. 4 A block diagram for the principle integration of the invention in a motor vehicle with air conditioning.
- FIG. 1 schematically shows a typical cooling system for a six-cylinder internal combustion engine 1.
- a vehicle cooler 2 and a heating heat exchanger 3 are integrated in the cooling system.
- the cooling capacity of the vehicle radiator can be influenced with an electrically driven fan 4.
- the electric motor of the fan is regulated with a control unit 5.
- Cooled coolant is removed from the vehicle cooler by means of the feed line 6 and fed with the coolant pump 7 into the cooling lines 8 for feeding the cooling channels (not shown in more detail) for the combustion cylinders 9.
- the heated coolant is led from the combustion cylinders 9 via return lines 10 to a three-way thermostat 11.
- the coolant from the internal combustion engine returns via the radiator return 12 to the vehicle cooler or via the radiator short circuit 13 and the coolant pump 7 back into the cooling lines 8 of the internal combustion engine.
- the cooling system can be operated in a known manner in short-circuit operation, in mixed operation, or in the large cooling circuit.
- the heating heat exchanger 3 is connected to the high-temperature branch of the cooling system in the internal combustion engine via a temperature-controlled shut-off valve 14.
- the throughput after opening the shut-off valve 14 by the heating heat exchanger can be regulated with an additional electric coolant pump 15 and a clocked shut-off valve 16 to regulate the heating power.
- the control of the actuating elements on the valves of the three-way thermostat 11 is in this case by the control unit 5 set.
- a logic component in the form of a microelectronic computing unit is contained in the control device.
- the control unit is preferably formed by the control unit of the engine electronics.
- the control algorithms outlined in FIGS. 2 and 3 are implemented in the form of software programs in the logic component.
- the most important operating data for the adaptation of the control parameters are: the cooling water temperature, the coolant target temperature, an error detection signal failsafe, the torque currently applied to the internal combustion engine and various reference values Ref2Min, Ref2Max, Ref3, Refla, Reflbn, which are used for the decision-making processes, such as they will be discussed in connection with Figures 2 and 3 have meaning.
- the shut-off valve 14 is opened or closed with the control unit.
- the coolant flow in the cooling channels of the internal combustion engine can be brought to a standstill with the heating shut-off valve 14 with a suitable valve position in the three-way thermostat 11 until a threshold temperature is reached at which the coolant flow is then started and thus the internal combustion engine is cooled.
- the heater shut-off valve 14 initially remains closed until the cooling water temperature exceeds at least one temperature threshold.
- the corresponding decision algorithm is shown graphically in FIG. 2 in a simplified manner.
- the decision algorithm is implemented as a software program in the control unit 5.
- the cooling water temperature determined with a sensor S is compared with a size comparison, which is preferably implemented in the program 20 compared with a predetermined and stored reference value Refla.
- This reference value is an engine-specific temperature reference value that indicates the operating threshold for the activation of the coolant flow. If the current cooling water temperature exceeds this engine-specific operating threshold, the corresponding control signal for opening the heating shut-off valve is sent to the actuators and the heating shut-off valve is opened for the operation of the vehicle heating with a downstream logic in the control unit 5.
- the operating threshold can advantageously be associated with a second lower temperature threshold Reflb as the advance threshold and connected in parallel in terms of programming. If the cooling water temperature exceeds the flow threshold, the heating shut-off valve can be opened briefly in order to cause the wax pill to flow through with already heated cooling water in the three-way thermostat 11. This prepares the three-way thermostat for the upcoming commissioning of the cooling system. Expediently, the exceeding of the cooling water temperature will be carried out with a program-related comparison stage 21 and the temporary opening of the heating shut-off valve with a program-related time control 22.
- the two program loops for monitoring the operating threshold and for monitoring the advance threshold can alternatively be supplied to the downstream process control with an OR query 23.
- a temperature sensor S and two comparison stages 30, 31 monitor whether the cooling water temperature is in a range between an upper reference value Ref2Max and a lower reference value Ref2Min.
- the expected load-dependent cooling water target temperature TM_ECT is calculated from the current torque, or rather the current torque curve, using a motor model.
- This cooling water target temperature is compared with a further comparison stage 32 with a further reference value Ref3 as overload protection. If the cooling water temperature calculated from the engine load is above a limit value for overload protection or if the calculated cooling water temperature is above the current cooling water temperature and at the same time the cooling water temperature is in a temperature range below the operating threshold of the cooling system, the coolant flow is started as a precautionary measure to prevent local overheating prevent.
- the coolant flow is brought about by an alternative opening of the heating shut-off valve 14 or by a suitable valve position in the three-way thermostat 11.
- the exemplary embodiment in FIG. 3 favors the simultaneous existence of two conditions for starting the premature coolant flow, namely the cooling water temperature must be in a certain temperature interval between a lower one Reference value Ref2Min and an upper reference value Ref2Max lie and the load-dependent, calculated cooling water target temperature must be above a comparison value.
- these two conditions are combined with an AND query 33.
- This procedure has the advantage that if the cooling water temperature is not within the specified temperature interval, the calculation of a load-dependent cooling water target temperature is not taken into account and can be omitted. Once the engine has reached its operating temperature, the overload protection and thus the calculation of a load-dependent cooling water target temperature can be switched off by querying the temperature interval. This relieves the computing capacity in control unit 5.
- overload protection can also be carried out by simply comparing the calculated, load-dependent cooling water target temperature TM_ECT with a comparison temperature, either the actual cooling water temperature or with a reference value Ref3. Then, each time the calculated cooling water target temperature is above the comparison value, the coolant flow is brought about by opening the corresponding valves.
- failsafe can be started as a precaution, the coolant flow by opening the heating shut-off valve and by actuating the corresponding valves in the three-way thermostat as a precaution.
- An error detection signal can e.g. generated by the self-test of the control unit or transmitted via signal lines if other components work incorrectly.
- FIG. 4 shows a block diagram for integrating the decision processes from FIGS. 2 and 3 into a motor vehicle with air conditioning system 41.
- the driver's customer request must be taken into account. This means that there must be a possibility for the motor vehicle driver to influence the decision-making processes as shown in FIG. 2 and FIG. 3. This applies in particular if the motor vehicle driver wants to start the heating because it is too cold for him. In this case, if the heating Regulator from the air conditioning 41 a signal for a heating request to the logic of the control unit 5 are sent.
- Prioritization will give particular preference to the heating requirement. This priority is given, for example, by a time control, such that after a minimum period of, for example, 2 minutes since a heating request has been made, the heating request is given absolute priority and the heating shut-off valve is opened in any case regardless of other operating parameters. If desired, the heating request from the air conditioning system can of course always be given priority whenever the heating request arises. However, in the latter alternative, the advantages of the decision-making process according to FIG. 2 and FIG. 3 would be at least partially nullified.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air-Conditioning For Vehicles (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/568,189 US7421984B2 (en) | 2003-08-14 | 2004-07-31 | Method for adjusting a coolant flow by means of a heating cut-off valve |
JP2006522941A JP2007502381A (ja) | 2003-08-14 | 2004-07-31 | 暖房用遮断弁により冷媒の流れを調整する方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10337413.2 | 2003-08-14 | ||
DE10337413A DE10337413A1 (de) | 2003-08-14 | 2003-08-14 | Verfahren zur Regulierung des Kühlmittelflusses mit einem Heizungsabsperrventil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005017328A1 true WO2005017328A1 (de) | 2005-02-24 |
Family
ID=34177558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2004/008616 WO2005017328A1 (de) | 2003-08-14 | 2004-07-31 | Verfahren zur regulierung des kühlmittelflusses mit einem heizungsabsperrventil |
Country Status (4)
Country | Link |
---|---|
US (1) | US7421984B2 (de) |
JP (1) | JP2007502381A (de) |
DE (1) | DE10337413A1 (de) |
WO (1) | WO2005017328A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10311188B4 (de) * | 2003-03-12 | 2012-10-31 | Att Automotivethermotech Gmbh | Verfahren und Vorrichtung zur bedarfsgerechten Kühlung von Verbrennungskraftmaschinen unter Verwendung eines Bypassventils und mindestens einer Wärmesenke |
DE10336599B4 (de) * | 2003-08-08 | 2016-08-04 | Daimler Ag | Verfahren zur Ansteuerung eines Thermostaten in einem Kühlkreislauf eines Verbrennungsmotors |
JP4700016B2 (ja) * | 2007-02-14 | 2011-06-15 | プライムアースEvエナジー株式会社 | 制御機能付き回路、及び、その検査方法 |
US8740103B2 (en) * | 2008-04-21 | 2014-06-03 | GM Global Technology Operations LLC | Heater coolant flow control for HVAC module |
DE102009020186B4 (de) * | 2009-05-06 | 2011-07-14 | Audi Ag, 85057 | Ausfallsicherer Drehsteller für einen Kühlmittelkreislauf |
EP2487346B1 (de) * | 2009-10-05 | 2015-01-14 | Toyota Jidosha Kabushiki Kaisha | Kühlvorrichtung für fahrzeuge |
CN103097704B (zh) * | 2010-09-08 | 2015-02-11 | 丰田自动车株式会社 | 发动机的控制装置及控制方法 |
EP2636866A1 (de) * | 2010-11-01 | 2013-09-11 | Toyota Jidosha Kabushiki Kaisha | Kühlsystem für einen verbrennungsmotor |
EP2530273B1 (de) | 2011-06-01 | 2020-04-08 | Joseph Vögele AG | Baumaschine mit automatischer Lüfterdrehzahlregelung |
EP2578888B1 (de) * | 2011-10-07 | 2018-12-05 | Joseph Vögele AG | Baumaschine mit automatischer Lüfterdrehzahlregelung |
KR101338468B1 (ko) * | 2012-10-17 | 2013-12-10 | 현대자동차주식회사 | 전자식 써모스탯의 제어방법 및 그 시스템 |
FR3087488B1 (fr) * | 2018-10-23 | 2020-12-18 | Psa Automobiles Sa | Procede d’ouverture anticipee d’un thermostat froid dans un systeme de refroidissement d’un moteur |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4930455A (en) * | 1986-07-07 | 1990-06-05 | Eaton Corporation | Controlling engine coolant flow and valve assembly therefor |
DE4033261A1 (de) * | 1990-10-19 | 1992-04-23 | Freudenberg Carl Fa | Verbrennungskraftmaschine |
EP0900924A2 (de) * | 1997-09-09 | 1999-03-10 | Toyota Jidosha Kabushiki Kaisha | Kühlwasserrückführungseinrichtung für eine Brennkraftmaschine |
FR2776707A1 (fr) * | 1998-03-31 | 1999-10-01 | Peugeot | Systeme de gestion des echanges thermiques dans un vehicule automobile |
EP0965737A2 (de) * | 1998-06-17 | 1999-12-22 | Siemens Canada Limited | Regelsystem für totale Kühlung einer Brennkraftmaschine |
WO2003006857A1 (fr) * | 2001-07-11 | 2003-01-23 | Valeo Thermique Moteur | Vanne de commande pour un circuit de refroidissement |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2471514A (en) * | 1945-07-20 | 1949-05-31 | Robertshaw Fulton Controls Co | Safety type thermostat |
US2706085A (en) * | 1951-03-29 | 1955-04-12 | Daimler Benz Ag | Thermostatic regulating device for the liquid cooling system of a combustion engine |
US3211374A (en) * | 1963-07-09 | 1965-10-12 | Victor E Matulaitis | Rapid heating engine cooling system |
DE2314301C3 (de) * | 1973-03-22 | 1978-07-20 | Bayerische Motoren Werke Ag, 8000 Muenchen | Unilaufkiihlvorrichtung für Kolbenbrennkraftmaschinen |
DE4432292B4 (de) | 1993-03-13 | 2006-05-11 | Phoenix Ag | Verteilereinrichtung für das Kühl- bzw. Heizsystem von Fahrzeugen mit Verbrennungsmotoren |
JPH11117739A (ja) * | 1997-10-09 | 1999-04-27 | Toyota Motor Corp | 内燃機関の冷却水循環装置 |
DE10012197B4 (de) | 2000-03-13 | 2012-02-02 | Behr Thermot-Tronik Gmbh | Thermomanagement für ein Kraftfahrzeug mit einem Kühlmittelkreislauf und einer Klimaanlage |
-
2003
- 2003-08-14 DE DE10337413A patent/DE10337413A1/de not_active Withdrawn
-
2004
- 2004-07-31 US US10/568,189 patent/US7421984B2/en not_active Expired - Fee Related
- 2004-07-31 WO PCT/EP2004/008616 patent/WO2005017328A1/de active Application Filing
- 2004-07-31 JP JP2006522941A patent/JP2007502381A/ja not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4930455A (en) * | 1986-07-07 | 1990-06-05 | Eaton Corporation | Controlling engine coolant flow and valve assembly therefor |
DE4033261A1 (de) * | 1990-10-19 | 1992-04-23 | Freudenberg Carl Fa | Verbrennungskraftmaschine |
EP0900924A2 (de) * | 1997-09-09 | 1999-03-10 | Toyota Jidosha Kabushiki Kaisha | Kühlwasserrückführungseinrichtung für eine Brennkraftmaschine |
FR2776707A1 (fr) * | 1998-03-31 | 1999-10-01 | Peugeot | Systeme de gestion des echanges thermiques dans un vehicule automobile |
EP0965737A2 (de) * | 1998-06-17 | 1999-12-22 | Siemens Canada Limited | Regelsystem für totale Kühlung einer Brennkraftmaschine |
WO2003006857A1 (fr) * | 2001-07-11 | 2003-01-23 | Valeo Thermique Moteur | Vanne de commande pour un circuit de refroidissement |
Also Published As
Publication number | Publication date |
---|---|
DE10337413A1 (de) | 2005-03-10 |
US20070028862A1 (en) | 2007-02-08 |
US7421984B2 (en) | 2008-09-09 |
JP2007502381A (ja) | 2007-02-08 |
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