EP2307678A1 - Kühleinrichtung für eine kraftfahrzeug-brennkraftmaschine und verfahren zum betreiben derselben - Google Patents
Kühleinrichtung für eine kraftfahrzeug-brennkraftmaschine und verfahren zum betreiben derselbenInfo
- Publication number
- EP2307678A1 EP2307678A1 EP09776737A EP09776737A EP2307678A1 EP 2307678 A1 EP2307678 A1 EP 2307678A1 EP 09776737 A EP09776737 A EP 09776737A EP 09776737 A EP09776737 A EP 09776737A EP 2307678 A1 EP2307678 A1 EP 2307678A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coolant
- internal combustion
- combustion engine
- heat exchanger
- subcircuit
- 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.)
- Granted
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 55
- 238000001816 cooling Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000002826 coolant Substances 0.000 claims abstract description 157
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000005259 measurement Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
-
- 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
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
-
- 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
- Cooling device for a motor vehicle internal combustion engine and method for operating the same
- the invention relates to a device for cooling a motor vehicle 'internal combustion engine in a cooling circuit with a coolant pump, an engine housing, a AbgasmckzhouA / Värme (2004), a coolant thermostatic valve and a coolant heat exchanger and a method for operating such a cooling device ,
- the coolant is circulated by means of the coolant pump and flows through even in a startup phase or at low load of the internal combustion engine not only the exhaust gas recirculation heat exchanger, but also the BrennkraftTnaschinen housing.
- the coolant thermostatic valve switches on the coolant heat exchanger. This prevents excessive thermal load on the internal combustion engine, especially at high load.
- ademitteid urchströmung the internal combustion engine is often not even required in the starting phase or low load of the engine in terms of their thermal load and the registered by the internal combustion engine in the coolant heat contributes to a reduced cooling capacity in the exhaust gas recirculation heat exchanger.
- the invention is therefore based on the object to provide an aforementioned device for cooling a motor vehicle internal combustion engine, in which a cooling of the internal combustion engine takes place only if this is necessary in particular from a thermal point of view and otherwise to keep a heat input into the coolant low in order to achieve the most efficient possible cooling of the recirculated exhaust gas by means of the coolant-flowed exhaust gas recirculation heat exchanger.
- the object is achieved with a device for cooling a motor vehicle internal combustion engine with the features of claim 1, by the coolant pump and the exhaust gas recirculation heat exchanger from a first coolant subcircuit and the coolant pump and the engine housing of a second Coolant subcircuit are included.
- a separate regulation of the flow, in particular of the internal combustion engine housing on the one hand and on the other hand, in particular the exhaust gas recirculation heat exchanger allows, so that a flow through the engine housing and thus a heat input into the coolant can be substantially prevented and still allows a flow through the exhaust gas recirculation heat exchanger is.
- the invention is achieved by a method having the features of claim 5, wherein at a temperature of the internal combustion engine below a predetermined first value, a first shut-off valve is closed and a coolant circulation in the second coolant subcircuit is substantially prevented, so that the coolant circulates substantially in the first refrigerant subcircuit.
- a first shut-off valve is closed and a coolant circulation in the second coolant subcircuit is substantially prevented, so that the coolant circulates substantially in the first refrigerant subcircuit.
- a first shut-off valve for opening or closing the second coolant subcircuit is provided.
- a flow through the second coolant subcircuit, in particular of the internal combustion engine housing, can be substantially prevented.
- the coolant thermostatic valve regulates a coolant flow of the coolant heat exchanger, so that cooling of the coolant takes place only if this is due in particular the thermal load of the internal combustion engine and / or the requirements for the cooling of the recirculated exhaust gas is required.
- a cooling device with a heating heat exchanger this is comprised of a third coolant subcircuit and a second shutoff valve is provided for opening or closing the third coolant subcircuit.
- the heating heat exchanger can be switched on or off as required by the first and / or second coolant subcircuit.
- a preferred embodiment of the method according to the invention is characterized in that at a temperature of the internal combustion engine above a predetermined first value, the first shut-off valve is open and the coolant circulates both in the first and in the second coolant subcircuit. In this operating state, the cooling of the internal combustion engine has priority over the requirement to cool the recirculated exhaust gas.
- the coolant thermostatic valve prevents a flow through the coolant heat exchanger and enables it at a temperature of the internal combustion engine above the predetermined second value.
- the regulation of the coolant thermostatic valve is basically independent of the predetermined first value, after which the first shut-off valve is regulated, but the first and second predetermined values may also be at least approximately equal.
- the second shut-off valve opens or closes depending on the temperature of the internal combustion engine, the outside temperature, a driver-side Schuanograph and / or other parameters, so that a coolant circulation in the third coolant subcircuit is substantially prevented or the coolant in both the first and / or second as well circulates in the third coolant subcircuit.
- FIG. 1 shows a device for cooling a motor vehicle
- FIG. 2 shows a device for cooling a motor vehicle
- FIG. 3 shows a device for cooling a motor vehicle internal combustion engine in a cooling circuit in an operating state in which a cooling of the internal combustion engine is required
- FIG. 4 shows a device for cooling a motor vehicle internal combustion engine in a cooling circuit in an operating state in which a cooling of the internal combustion engine and additionally cooling of the coolant is required.
- FIG. 1 shows in part a device for cooling a motor vehicle internal combustion engine with a first coolant subcircuit 100 with coolant pump 102 and exhaust gas recirculation heat exchanger 104 and a second coolant subcircuit 200 with coolant pump 102 and engine housing 209.
- a shut-off valve 204 is provided for opening or closing the second coolant subcircuit 200.
- Figure 1 illustrates the general inventive idea, which is explained in the figures 2-4 on the basis of specific embodiments, the following description, where applicable, is also to be read on Figure 1.
- FIG 2 shows a device for cooling a motor vehicle internal combustion engine in a cooling circuit in an operating condition in which a Cooling of the internal combustion engine is not required
- this device is in an operating condition in which a cooling of the internal combustion engine and in Figure 4 in an operating condition in which a cooling of the coolant is additionally required shown.
- the figures show a motor vehicle internal combustion engine with cooling circuit.
- the motor vehicle is preferably a truck or a car
- the internal combustion engine is in particular a hydrocarbon-powered reciprocating internal combustion engine
- the coolant is expediently water-based with additives for improving the anticorrosion effect and lowering the freezing point.
- the internal combustion engine includes an engine housing with crankcase 208 and cylinder head 210 having channels for coolant flow. For coolant inflow and outflow several coolant inlets and outlets are provided on the engine casing.
- a coolant pump 102 serves to circulate the coolant.
- a first coolant inlet is provided in the region of the crankcase 208 on the coolant pump side.
- a first coolant outlet is also provided in the region of the crankcase 208 and leads to an exhaust gas recirculation heat exchanger 104.
- the exhaust gas recirculation heat exchanger 104 on the one hand coolant and on the other hand exhaust gas flows through, so that between the coolant and exhaust gas for cooling the exhaust gas, a heat transfer can take place. Downstream of the exhaust gas recirculation heat exchanger 104 ademittehThermostatventil 106 is arranged in the cooling circuit, from which starting a coolant line leads back to the coolant pump 102.
- a second coolant outlet is provided, starting from which a coolant line branch via a Coolant surge tank 214 to the coolant pump 102 and another coolant line branch via a coolant heat exchanger 216 to the coolant thermostatic valve 106 leads.
- the coolant heat exchanger 216 on the one hand coolant and on the other hand flows through air, so that between the coolant and air to cool the coolant, a heat transfer can take place.
- a third coolant outlet in the region of the crankcase 208 is connected via an oil cooler 212 to a second coolant inlet in the cylinder head region.
- the oil cooler 212 on the one hand cool medium dog on the other hand flows through oil, so that between the coolant and oil to cool the oil, a heat transfer can take place.
- the oil is used for example for lubrication and cooling of the internal combustion engine.
- Downstream of the exhaust gas recirculation heat exchanger 104 branches off a coolant line, which initially leads to a first shut-off valve 402 and, starting there, branching out, on the one hand into the coolant line coming from the second coolant outlet in the region of the cylinder head 210 and on the other a second shut-off valve 404 and a heating heat exchanger 318 leads and opens into the line leading to the coolant pump 102 line.
- the heating heat exchanger 318 on the one hand flows through the coolant and on the other hand flows through a heating means for heating the motor vehicle interior, so that a heat transfer can take place between the coolant and the heating heating means.
- a further pump 320 is arranged in the line leading to the heating heat exchanger 318.
- the shut-off valves 402 and 404 are presently designed together as a 3/2-way valve.
- FIG. 1 which shows an operating state in which cooling of the internal combustion engine is not required, but the recirculated exhaust gas is cooled
- a first coolant subcircuit 100 is shown with a solid line Line shown, the remaining areas of the coolant circuit are shown dotted.
- FIG. 2 which shows an operating state in which cooling of the internal combustion engine is required
- a second coolant subcircuit 200 with dashed line is shown in addition to the first coolant subcircuit 100 shown by a solid line.
- a third coolant subcircuit 300 is shown in dots.
- the first coolant subcircuit 100 includes the coolant pump 102, the exhaust gas recirculation heat exchanger 104, and the coolant thermostat valve 106
- the second coolant subcycle 200 includes the coolant pump 102, the engine housing 208, 210, and the coolant thermostatic valve 106th
- the first shut-off valve 402 is closed, so that a coolant circulation in the second coolant subcircuit 200 is substantially suppressed.
- the coolant is therefore conveyed in the first coolant subcircuit 100 from the coolant pump 102 to the crankcase 208, but flows through this only very short path to flow to the exhaust gas recirculation heat exchanger 104 without significant heat absorption. Further, the coolant flows to the coolant thermostatic valve 106 and back to the coolant pump 102. Coolant flow through the crankcase 208, the cylinder head 210, and the coolant heat exchanger 216 is inhibited. Also prevented is a flow through the heating heat exchanger 318 by the second shut-off valve 404 is closed.
- the first shut-off valve 402 is opened so that the coolant is in both the first coolant subcircuit 100 and in the first second coolant subcircuit 200 rotates.
- a flow through the exhaust gas recirculation heat exchanger 104 in the first coolant subcircuit 100 takes place as described above.
- the second coolant subcircuit 200 is flowed through.
- the coolant temperature thermostat valve 106 blocks a flow through the coolant heat exchanger 216, so that the coolant flows in from the cylinder head 210 between the shut-off valves 404 and 402 and subsequently flows through the thermostatic valve 106 to the coolant pump 102.
- the thermostatic valve 106 allows flow through the coolant heat exchanger 216, so that the coolant from the cylinder head 210 flows through the coolant heat exchanger 216 and below through the thermostatic valve 106 to the coolant pump 102 flows.
- the second shut-off valve 404 a flow through the heating heat exchanger 318 is controlled.
- MVEG cycle European driving cycle for emission and consumption measurements on chassis dynamometers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200810037062 DE102008037062A1 (de) | 2008-08-08 | 2008-08-08 | Kühleinrichtung für eine Kraftfahrzeug-Brennkraftmaschine und Verfahren zum Betreiben derselben |
PCT/EP2009/004317 WO2010015294A1 (de) | 2008-08-08 | 2009-06-16 | Kühleinrichtung für eine kraftfahrzeug-brennkraftmaschine und verfahren zum betreiben derselben |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2307678A1 true EP2307678A1 (de) | 2011-04-13 |
EP2307678B1 EP2307678B1 (de) | 2019-04-10 |
Family
ID=41319866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09776737.0A Active EP2307678B1 (de) | 2008-08-08 | 2009-06-16 | Kühleinrichtung für eine kraftfahrzeug-brennkraftmaschine und verfahren zum betreiben derselben |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2307678B1 (de) |
DE (1) | DE102008037062A1 (de) |
WO (1) | WO2010015294A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012205001B4 (de) | 2012-02-21 | 2022-02-03 | Bayerische Motoren Werke Aktiengesellschaft | Kühlmittelkreislauf für eine Brennkraftmaschine und Verfahren zum Betrieb der Brennkraftmaschine |
DE102017212548A1 (de) | 2017-07-21 | 2019-01-24 | Bayerische Motoren Werke Aktiengesellschaft | Kühlmittelkreislauf für eine Brennkraftmaschine |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19633190B4 (de) * | 1996-08-17 | 2004-02-26 | Daimlerchrysler Ag | Kühlsystem für eine Brennkraftmaschine |
DE10146313A1 (de) * | 2001-09-20 | 2003-04-17 | Daimler Chrysler Ag | Kühlkreislauf einer flüssigkeitsgekühlten Brennkraftmaschine |
DE10332947A1 (de) * | 2003-07-19 | 2005-02-03 | Daimlerchrysler Ag | Brennkraftmaschine für ein Kraftfahrzeug |
DE10351148A1 (de) * | 2003-11-03 | 2005-06-02 | Bayerische Motoren Werke Ag | Kühlanlage für einen Verbrennungsmotor eines Fahrzeugs mit einer abschaltbaren Wasserpumpe |
DE102004052137A1 (de) * | 2004-10-27 | 2006-05-11 | Bayerische Motoren Werke Ag | Kühlmittelkreislauf für eine Brennkraftmaschine |
DE102006020951A1 (de) * | 2005-07-28 | 2007-02-01 | Audi Ag | Kühlsystem für ein Fahrzeug und Verfahren zum Betreiben eines Kühlsystems |
FR2897392A1 (fr) * | 2006-02-10 | 2007-08-17 | Renault Sas | Dispositif et procede de refroidissement pour moteur et organe de vehicule. |
DE502007001624D1 (de) * | 2007-01-17 | 2009-11-12 | Ford Global Tech Llc | Integriertes Motorkühlsystem |
-
2008
- 2008-08-08 DE DE200810037062 patent/DE102008037062A1/de not_active Withdrawn
-
2009
- 2009-06-16 WO PCT/EP2009/004317 patent/WO2010015294A1/de active Application Filing
- 2009-06-16 EP EP09776737.0A patent/EP2307678B1/de active Active
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2010015294A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010015294A1 (de) | 2010-02-11 |
DE102008037062A1 (de) | 2010-02-11 |
EP2307678B1 (de) | 2019-04-10 |
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