CN103370524A - Cooling circuit for an internal combustion engine having exhaust gas recirculation and method for operating an internal combustion engine having such a cooling circuit - Google Patents
Cooling circuit for an internal combustion engine having exhaust gas recirculation and method for operating an internal combustion engine having such a cooling circuit Download PDFInfo
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- CN103370524A CN103370524A CN2011800677469A CN201180067746A CN103370524A CN 103370524 A CN103370524 A CN 103370524A CN 2011800677469 A CN2011800677469 A CN 2011800677469A CN 201180067746 A CN201180067746 A CN 201180067746A CN 103370524 A CN103370524 A CN 103370524A
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- cooler
- exhaust gas
- combustion engine
- coolant
- recycled exhaust
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
- F02M26/23—Layout, e.g. schematics
- F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
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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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/16—Outlet manifold
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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
- F01P3/00—Liquid cooling
- F01P3/12—Arrangements for cooling other engine or machine parts
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention relates to a cooling circuit (1) for an internal combustion engine (2) having exhaust gas recirculation. The internal combustion engine (2) has a coolant inlet (3) and a coolant outlet (4). The cooling circuit (1) further comprises a main cooler (5) having a cooler inlet (6) and a cooler outlet (7), an EGR cooler (8) having an EGR cooler inlet (9) for coolant, and an EGR outlet (10) for coolant, and a main control device (11) disposed upstream of the internal combustion engine (2) in the flow direction of the coolant. In order that the EGR cooler (8) can provide the performance required, and that maximum operating reliability of the cooling circuit (1) and the modules provided in the cooling circuit (1) is possible, according to the invention the cooling circuit (1) has an auxiliary control device (12) disposed downstream of the exhaust gas recirculation cooler (8) in the flow direction of the coolant, and/or an exhaust gas recirculation control device (13) disposed upstream of the exhaust gas recirculation cooler (8) in the flow direction of the coolant. The invention further relates to a method for operating an internal combustion engine (2) having such a cooling circuit (1).
Description
The present invention relates to a kind of for the internal-combustion engine of gas recirculation system (AGR) cooling circuit in particular for diesel engine.Described internal-combustion engine has coolant entrance and coolant outlet.Cooling circuit also comprise with the primary cooler of cooler entrance and cooler outlet, band be useful on the cooler for recycled exhaust gas entrance of freezing mixture and be used for freezing mixture the cooler for recycled exhaust gas outlet cooler for recycled exhaust gas and be arranged in main regulation device before the internal-combustion engine, especially main thermostat along the flow direction of freezing mixture.
The invention still further relates to a kind of method that has the internal-combustion engine of this cooling circuit for operation.
Gas recirculation system is used for waste gas is returned the fresh air side that causes internal-combustion engine from the exhaust gas side of internal-combustion engine.For this reason, by EGR pipeline exhaust gas routing.For the cooling of gas recirculation system, in the EGR pipeline, cooler for recycled exhaust gas is set.
The method and apparatus of described type is known by patent documentation DE10 2,006 023 855A1.Described patent documentation has shown a kind of Exhaust gas recirculation device for internal-combustion engine, it has the EGR pipeline and is contained in cooler for recycled exhaust gas in the EGR pipeline, and described cooler for recycled exhaust gas is connected on the cooling circuit by liquid coolant work.Cooler for recycled exhaust gas has the cooler casing that can make coolant flow, and it has at least one exhaust gas entrance, waste gas outlet, coolant entrance and coolant outlet.In order to change better cooling effectiveness, cooler for recycled exhaust gas comprises the first and second cooling tube devices in its cooler casing, and wherein, the second cooling tube device can produce larger hot-fluid than the first cooling tube device between waste gas and freezing mixture.
In addition, known by patent documentation DE103 58 311A1, the circulation of cooler for recycled exhaust gas can be undertaken by valve and thermostat control ground.At this, described valve is for the volume flowrate of the fuel of the low temperature preservation that improves fuel heat exchanger, and thermostat is used for improving the heating properties of fuel heat exchanger.
The internal-combustion engine of nearly all coming of new, especially diesel engine all have the gas recirculation system of cooling according to current prior art.Be mainly used to load cooler for recycled exhaust gas from the freezing mixture of combustion engine cylinder head at this.Yet, in order to improve the efficient of cooler for recycled exhaust gas, using more and more the freezing mixture from the cooler outlet of primary cooler, the freezing mixture in the primary cooler has than the lower temperature of freezing mixture in the engine coolant outlet.
When the coolant temperature in cooler for recycled exhaust gas is higher than 50 degrees centigrade, guaranteed the safety in operation of cooler for recycled exhaust gas aspect carbon distribution and corrosion.That is to say in described temperature range, the precipitation of exhaust gas side forms and reduces in the cooler for recycled exhaust gas.This precipitation is comprised of the hydrocarbon of liquefaction, organic and inorganic acid and water.Because hardly can be without the exhaust gas recirculation valve of leaking ground and connecting by exhaust gas side, because leakage current and/or pulse and always have waste gas to enter in the cooler for recycled exhaust gas, the freezing mixture at this place may be heated to boiling spread.Yet, by especially after the internal-combustion engine cold start-up and/or when the lower ambient temperature, flowing through cooler for recycled exhaust gas from the freezing mixture of the cooler outlet of primary cooler, may cause coolant temperature in the cooler for recycled exhaust gas to drop to below 50 degrees centigrade or even be down to ambient temperature, produce the risk of the described carbon distribution of beginning and corrosion thereupon.
Under this background, technical problem to be solved by this invention is, design and running starts the internal-combustion engine cooling circuit of described type like this, so that cooler for recycled exhaust gas can provide required power on the one hand, and guarantee on the other hand to prevent that carbon distribution and burn into from preventing the maximum safety in operation that forms local hottest point (risk that especially exists cooler for recycled exhaust gas to damage) and prevent the freezing mixture boiling in cooling circuit.
This technical problem solves by a kind of cooling circuit that is used for internal-combustion engine according to the described feature of claim 1 by the present invention.Dependent claims relates to the suitable especially expansion design of the present invention.
Stipulate a kind of cooling circuit according to the present invention, it comprises the secondary controlling device after the flow direction of freezing mixture is arranged in cooler for recycled exhaust gas, and/or is arranged in cooler for recycled exhaust gas EGR controlling device before along the flow direction of freezing mixture.Thus, cooler for recycled exhaust gas can supply coolant flow enduringly, wherein, and always 50 degrees centigrade or only with the running temperature of this cooler for recycled exhaust gas little deviation is arranged of the coolant temperatures in the cooler for recycled exhaust gas.Can guarantee the desired efficient of cooler for recycled exhaust gas so on the one hand, guarantee on the other hand to prevent that carbon distribution and burn into from preventing the maximum safety in operation that forms local hottest point (risk that especially exists cooler for recycled exhaust gas to damage) and prevent the freezing mixture boiling in cooling circuit.In a kind of modification form of implementation of cooling circuit, described coolant entrance links to each other with the main coolant pump that especially is arranged between main regulation device and the internal-combustion engine.The main regulation device is preferably designed for thermostat.
Advantageously, described EGR controlling device is designed for the cooler for recycled exhaust gas entrance is linked to each other with cooler outlet or coolant outlet.Thus, cooler for recycled exhaust gas can supply coolant flow enduringly.At this, the EGR controlling device can have the function of thermostat, mixing arrangement and/or valve (especially two position two-way valve or two position three-way valve).
Advantageously, described secondary controlling device is designed for the cooler for recycled exhaust gas outlet is linked to each other with cooler entrance and/or coolant entrance, perhaps is designed for the cooler for recycled exhaust gas outlet is linked to each other with the cooler entrance with coolant outlet.Thus, can in cooling-cycle device, connect different coolant path for different running statees.At first can according to coolant temperature the freezing mixture that refluxes be directed to each equipment by secondary controlling device, such as internal-combustion engine, primary cooler and/or cooler for recycled exhaust gas.
Advantageously, under load operation conditions, described cooler outlet links to each other with the cooler for recycled exhaust gas entrance with the coolant entrance of internal-combustion engine, and the outlet of described cooler for recycled exhaust gas links to each other with the cooler entrance with the coolant outlet of internal-combustion engine.Especially can higher in ambient temperature (especially above 40 degrees centigrade) and/or when coolant temperature higher (especially in the coolant outlet of internal-combustion engine and above 90 degrees centigrade), for internal-combustion engine and cooler for recycled exhaust gas supply from regulating of cooler outlet lower freezing mixture.When coolant temperature and/or ambient temperature are higher, also can guarantee to provide thus cooler for recycled exhaust gas and the desired efficient of internal-combustion engine.
A kind of favourable expansion design of cooling circuit is, starting under the running state, especially after the internal-combustion engine cold start-up, the coolant outlet of described internal-combustion engine links to each other with the cooler for recycled exhaust gas entrance of cooler for recycled exhaust gas, and links to each other with the coolant entrance of described internal-combustion engine by cooler bypass and main regulation device.Thus, when coolant temperature was low, cooler for recycled exhaust gas also can continue circulation for freezing mixture.At this advantageously, described secondary controlling device is adjusted to, so that the outlet of the cooler for recycled exhaust gas of described cooler for recycled exhaust gas links to each other with the coolant entrance of described internal-combustion engine by the cooler bypass.By walking around primary cooler, after cold start-up, successfully freezing mixture is placed on the required running temperature that is about 50 degrees centigrade.Primary cooler does not need operation under the startup running state simultaneously.
The another kind of favourable design of cooling circuit is, under the mixed running state, described EGR controlling device especially is set to according to coolant temperature, so that the cooler for recycled exhaust gas entrance of described cooler for recycled exhaust gas links to each other with the coolant outlet of internal-combustion engine and/or with the cooler outlet of primary cooler.Can irrespectively be that cooler for recycled exhaust gas is regulated the desirable coolant temperature of formation in heating period and the rising of the coolant temperature in the internal-combustion engine of internal-combustion engine thus.For this reason, the EGR controlling device is designed to, and makes it possible to from switching between the coolant flow of the coolant outlet of internal-combustion engine and the coolant flow from the cooler outlet of primary cooler or can be hierarchically and/or infinitely mix described two coolant flows.In addition, under the mixed running state, secondary controlling device connected be, so that the cooler for recycled exhaust gas outlet links to each other with primary cooler and/or cooler bypass, and the coolant outlet of internal-combustion engine links to each other with the cooler bypass.
Described technical problem is also by a kind of method solution that operation has the internal-combustion engine of cooling circuit that is used for according to the described feature of claim 8.
Stipulate a kind of method according to the present invention, wherein, make from the freezing mixture of internal-combustion engine and/or from the freezing mixture of primary cooler according to threshold temperature and to flow through described cooler for recycled exhaust gas, wherein, determine described threshold temperature according to ambient temperature and/or coolant temperature.Thus, can irrespectively make freezing mixture flow through constantly cooler for recycled exhaust gas with ambient temperature and coolant temperature in internal combustion engine operation, described freezing mixture also has the coolant temperature that is conducive to the cooler for recycled exhaust gas operation.When the internal-combustion engine cold start-up, move cooling circuit starting under the running state, described startup running state makes equipment and freezing mixture be heated to rapidly separately running temperature.At this, normally freezing mixture at first reaches the optimum temperature of cooler for recycled exhaust gas operation.
In order to keep best coolant temperature in the internal-combustion engine heating period, cooling circuit moves under the mixed running state.For this reason, in the cooler for recycled exhaust gas ingress EGR controlling device is set, by its switchably and/or adjustable ground with optionally be conditioned colder from primary cooler freezing mixture and/or be conditioned the hotter freezing mixture from the engine coolant outlet load cooler for recycled exhaust gas.The EGR controlling device preferably switchably is designed to two position three-way valve or is designed to two position two-way valve.Freezing mixture backflow from cooler for recycled exhaust gas is transported to internal-combustion engine or primary cooler.Be provided with secondary controlling device for this reason.The coolant flow that is not delivered to cooler for recycled exhaust gas from internal-combustion engine is directed to the main regulation device by the cooler bypass under the mixed running state.That secondary controlling device and main regulation device are designed to passive constant temperature and/or can initiatively connect.The connection of EGR controlling device is preferably carried out like this according to ambient temperature and the coolant temperature of internal-combustion engine outside, so that also realize minimum carbon distribution when realizing effective EGR cooling.When ambient temperature rose (for example above 40 degrees centigrade), the threshold temperature of EGR controlling device descended.
The common threshold temperature of main regulation device is about 90 degrees centigrade for coolant temperature.If surpass described threshold temperature, then the cooler outlet of the coolant entrance of internal-combustion engine and primary cooler is coupled.The threshold temperature of EGR controlling device also can be applied on the main regulation device.Therefore make main regulation device (for example when ambient temperature surpasses 40 degrees centigrade) be reduced to 50 degrees centigrade freezing mixture threshold temperature.If coolant outlet links to each other with the cooler for recycled exhaust gas entrance, then can avoid thus the coolant overheating in the cooler for recycled exhaust gas.
After the running temperature in reaching internal-combustion engine and/or when ambient temperature is higher, under load operation conditions, move cooling circuit.At this, flow through internal-combustion engine and cooler for recycled exhaust gas from the freezing mixture of primary cooler.
Advantageously, when the internal-combustion engine cold start-up, the coolant outlet of described internal-combustion engine links to each other with the cooler for recycled exhaust gas entrance of described cooler for recycled exhaust gas, and links to each other with the coolant entrance of described internal-combustion engine by cooler bypass and main regulation device.Cooling circuit was especially connected before arriving the mixed running state like this.
The present invention can have a large amount of forms of implementation.In order to further specify its basic principle, shown in the drawings and in one of them form of implementation of following description.In the accompanying drawings:
Fig. 1 illustrates the schematic diagram that is in the cooling circuit that starts the internal-combustion engine under the running state;
Fig. 2 illustrates the schematic diagram of the cooling circuit that is in the internal-combustion engine under the mixed running state;
Fig. 3 illustrates the schematic diagram of the cooling circuit that is in the internal-combustion engine under the load operation conditions.
Fig. 1, Fig. 2 and Fig. 3 illustrate the cooling circuit 1 with the internal-combustion engine 2 of gas recirculation system.Internal-combustion engine 2 has coolant entrance 3 and coolant outlet 4.Also be provided with primary cooler 5 in cooling circuit 1, it has cooler entrance 6 and cooler outlet 7.The gas recirculation system that is used for waste gas is returned the fresh air side that causes internal-combustion engine 2 from the exhaust gas side of internal-combustion engine 2 comprises cooler for recycled exhaust gas 8, and it has for the cooler for recycled exhaust gas entrance 9 of freezing mixture and is used for the cooler for recycled exhaust gas outlet 10 of freezing mixture.In addition, in cooling circuit 1, be provided with main regulation device 11, secondary controlling device 12 and EGR controlling device 13.At this, main regulation device 11 is preferably designed for thermostat.Before main regulation device 11 is arranged in internal-combustion engine 2 along the flow direction of freezing mixture.Secondary controlling device 12 is after the flow direction of freezing mixture is arranged in cooler for recycled exhaust gas 8.Before EGR controlling device 13 is arranged in cooler for recycled exhaust gas 8 along the flow direction of freezing mixture.In addition, coolant entrance 3 links to each other with main coolant pump 14.At this, main coolant pump 14 is arranged between main regulation device 11 and the internal-combustion engine 2.EGR controlling device 13 is preferably designed for two position three-way valve as shown in Figures 2 and 3.
Fig. 1 illustrates the cooling circuit 1 that starts under the running state.Starting under the running state, when the cold start-up of internal-combustion engine 2, regulating cooling circuit 1.At this, regulate like this EGR controlling device 13, so that the coolant outlet 4 of internal-combustion engine 2 links to each other with the cooler for recycled exhaust gas entrance 9 of cooler for recycled exhaust gas 8.Can cooler for recycled exhaust gas 8 be heated to rapidly its running temperature by the used heat of internal-combustion engine 2 thus.The coolant outlet 4 of internal-combustion engine 2 also links to each other with main regulation device 11 by primary cooler bypass 16.Secondary controlling device 12 is starting like this adjusting under the running state, so that the cooler for recycled exhaust gas of cooler for recycled exhaust gas 8 outlet 10 links to each other with primary cooler bypass 16, and therefore link to each other with main regulation device 11, and link to each other with the coolant entrance 3 of internal-combustion engine 2 at last.Coolant flow supercooling agent pipeline 15 and coolant line 18.Starting under the running state, freezing mixture do not flow through coolant line 17, primary cooler 5, cooler entrance 6, cooler outlet 7 and be in cooler outlet 7 and EGR controlling device 13 between coolant line 19.At this, in a kind of Variant Design scheme, EGR controlling device 13 is designed to two position three-way valve.
Fig. 2 illustrates the cooling circuit 1 under the mixed running state.After internal-combustion engine 2 cold start-ups through interval after a while, until internal-combustion engine 2 heat penetrations and reach its running temperature.Usually when the freezing mixture in the coolant outlet 4 of internal-combustion engine 2 reached approximately 90 degrees centigrade temperature, internal-combustion engine 2 reached running temperature.In the heating period of internal-combustion engine 2, regulate like this EGR controlling device 13, so that the cooler outlet 7 of primary cooler 5 links to each other with the cooler for recycled exhaust gas entrance 9 of cooler for recycled exhaust gas 8.Secondary controlling device 12 is regulated under the mixed running state like this, so that the cooler for recycled exhaust gas of cooler for recycled exhaust gas 8 outlet 10 links to each other with the cooler entrance 6 of primary cooler 5.The coolant outlet 4 of internal-combustion engine 2 links to each other with main regulation device 11 by primary cooler bypass 16.Under the mixed running state, can only there be part to flow through coolant outlet 4 and the coolant line 15 between the EGR controlling device 13 that is in internal-combustion engine 2, the cooler outlet 7 that is in primary cooler 5 and the coolant line 17 between the main regulation device 11 and be in the coolant outlet 4 of internal-combustion engine 2 or the coolant line 18 between cooler bypass 16 and the secondary controlling device 12 by the coolant volume stream that circulates in the main coolant pump 14 of internal-combustion engine 2 of attaching troops to a unit.The circulation of coolant line and coolant line can be the on-state that optionally and basically depends on main regulation device 11 or secondary controlling device 12.At this, the flow direction in the coolant line 18 depends on the on-state of main regulation device 11 and/or secondary controlling device 12 equally.EGR controlling device 13 is designed to mixing arrangement according to a kind of modification form of implementation in this accompanying drawing.
Fig. 3 illustrates the cooling circuit 1 under the load operation conditions.When the coolant temperature at cooler for recycled exhaust gas entrance 9 places of coolant entrance 3 places of internal-combustion engine 2 and/or cooler for recycled exhaust gas 8 during greater than threshold value, cooling circuit 1 is adjusted to load operation conditions.Described threshold value is chosen as and is lower than the freezing mixture boiling point, is preferably greater than or equals 70 degrees centigrade.Can prevent thus refrigerant evaporates and therefore prevent the increase that coolant volume is followed.In addition, when ambient temperature during greater than threshold value, especially greater than 40 degrees centigrade and when coolant temperature surpasses 50 degrees centigrade simultaneously, regulate forming load operation conditions.At this, regulate like this EGR controlling device 13, so that the cooler outlet 7 of primary cooler 5 links to each other with the cooler for recycled exhaust gas entrance 9 of cooler for recycled exhaust gas 8.In addition, under load operation conditions, the coolant entrance 3 of internal-combustion engine 2 links to each other with the cooler outlet 7 of primary cooler 5.Secondary controlling device 12 is regulated under load operation conditions like this, so that the cooler for recycled exhaust gas of the coolant outlet 4 of internal-combustion engine 2 and cooler for recycled exhaust gas 8 outlet 10 links to each other with the cooler entrance 6 of primary cooler 5.Under load operation conditions, freezing mixture does not flow through coolant outlet 4 and the coolant line 15 between the EGR controlling device 13 and the coolant outlet 4 that is in internal-combustion engine 2 and the primary cooler bypass 16 between the main regulation device 11 that is in internal-combustion engine 2.
List of numerals
1 cooling circuit
2 internal-combustion engines
3 coolant entrances
4 coolant outlets
5 primary coolers
6 cooler entrances
7 cooler outlets
8 cooler for recycled exhaust gases
9 cooler for recycled exhaust gas entrances
The outlet of 10 cooler for recycled exhaust gases
11 main regulation devices
12 secondary controlling devices
13 EGR controlling devices
14 main coolant pumps
15 coolant line
16 primary cooler bypasses
17 coolant line
18 coolant line
19 coolant line
Claims (9)
1. a cooling circuit (1) that is used for internal-combustion engine (2) comprises
The coolant entrance (3) of-described internal-combustion engine (2) and coolant outlet (4),
The cooler entrance (6) of-primary cooler (5) and cooler outlet (7),
-comprise that the gas recirculation system of cooler for recycled exhaust gas (8), described cooler for recycled exhaust gas have for the cooler for recycled exhaust gas entrance (9) of freezing mixture and be used for the cooler for recycled exhaust gas outlet (10) of freezing mixture, and
-main regulation device (11), described main regulation device is arranged in internal-combustion engine (2) before along the flow direction of freezing mixture,
It is characterized in that, described cooling circuit (1) comprises
-be arranged in cooler for recycled exhaust gas (8) secondary controlling device (12) afterwards along the flow direction of freezing mixture, and/or
-be arranged in cooler for recycled exhaust gas (8) EGR controlling device (13) before along the flow direction of freezing mixture.
2. by cooling circuit claimed in claim 1 (1), it is characterized in that, described coolant entrance (3) links to each other with the main coolant pump (14) that especially is arranged between main regulation device (11) and the internal-combustion engine (2).
3. by claim 1 or 2 described cooling circuit (1) one of at least, it is characterized in that, described EGR controlling device (13) is designed for cooler for recycled exhaust gas entrance (9) is linked to each other with cooler outlet (7) or coolant outlet (4).
4. by at least one the described cooling circuit of aforementioned claim (1), it is characterized in that, described secondary controlling device (12) is designed for cooler for recycled exhaust gas outlet (10) is linked to each other with cooler entrance (6) and/or coolant entrance (3), perhaps is designed for cooler for recycled exhaust gas outlet (10) is linked to each other with cooler entrance (6) with coolant outlet (4).
5. by at least one the described cooling circuit of aforementioned claim (1), it is characterized in that, under load operation conditions, described cooler outlet (7) links to each other with EGR port (9) with the coolant entrance (3) of internal-combustion engine (2), and the coolant outlet (4) of described cooler for recycled exhaust gas outlet (10) and internal-combustion engine (2) links to each other with cooler entrance (6).
6. by at least one the described cooling circuit of aforementioned claim (1), it is characterized in that, starting under the running state, the coolant outlet (4) of described internal-combustion engine (2) links to each other with the cooler for recycled exhaust gas entrance (9) of cooler for recycled exhaust gas (8), and link to each other with the coolant entrance (3) of described internal-combustion engine (2) by cooler bypass (16) and main regulation device (11), and described secondary controlling device (12) is adjusted to, so that the cooler for recycled exhaust gas of described cooler for recycled exhaust gas (8) outlet (10) links to each other with the coolant entrance (3) of described internal-combustion engine (2) by cooler bypass (16).
7. by at least one the described cooling circuit of aforementioned claim (1), it is characterized in that, under the mixed running state, described EGR controlling device (13) especially is set to according to coolant temperature, so that the cooler for recycled exhaust gas entrance (9) of described cooler for recycled exhaust gas (8) links to each other with the coolant outlet (4) of internal-combustion engine (2) and/or with the cooler outlet (7) of primary cooler (5).
8. one kind is used for moving the method that has by the internal-combustion engine (2) of at least one the described cooling circuit of aforementioned claim (1), it is characterized in that, make from the freezing mixture of internal-combustion engine (2) and/or from the freezing mixture of primary cooler (5) according to threshold temperature and to flow through described cooler for recycled exhaust gas (8), wherein, determine described threshold temperature according to ambient temperature and/or coolant temperature.
9. by method claimed in claim 8, it is characterized in that, when internal-combustion engine (2) cold start-up, the coolant outlet (4) of described internal-combustion engine (2) links to each other with the cooler for recycled exhaust gas entrance (9) of described cooler for recycled exhaust gas (8), and links to each other with the coolant entrance (3) of described internal-combustion engine (2) by cooler bypass (16) and main regulation device (11).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102010055072A DE102010055072A1 (en) | 2010-12-18 | 2010-12-18 | Cooling circuit for an internal combustion engine with an exhaust gas recirculation and method for operating an internal combustion engine with such a cooling circuit |
| DE1020100550728 | 2010-12-18 | ||
| PCT/EP2011/006084 WO2012079715A1 (en) | 2010-12-18 | 2011-12-05 | Cooling circuit for an internal combustion engine having exhaust gas recirculation and method for operating an internal combustion engine having such a cooling circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103370524A true CN103370524A (en) | 2013-10-23 |
Family
ID=45315720
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011800677469A Pending CN103370524A (en) | 2010-12-18 | 2011-12-05 | Cooling circuit for an internal combustion engine having exhaust gas recirculation and method for operating an internal combustion engine having such a cooling circuit |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2652305B1 (en) |
| CN (1) | CN103370524A (en) |
| DE (1) | DE102010055072A1 (en) |
| WO (1) | WO2012079715A1 (en) |
Cited By (1)
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|---|---|---|---|---|
| CN110719988A (en) * | 2017-06-09 | 2020-01-21 | 日立汽车系统株式会社 | Cooling device and cooling method for internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2502833B (en) * | 2012-06-06 | 2017-07-12 | Gm Global Tech Operations Llc | Exhaust gas recirculation (EGR) cooling system |
| JP6230585B2 (en) * | 2015-11-18 | 2017-11-15 | 本田技研工業株式会社 | Exhaust gas purification device for internal combustion engine |
| DE102019208959A1 (en) | 2019-06-19 | 2020-12-24 | Volkswagen Aktiengesellschaft | Internal combustion engine with a cooling system comprising an EGR cooler |
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| DE102008015591A1 (en) * | 2008-03-26 | 2009-10-01 | Volkswagen Ag | Internal-combustion engine i.e. diesel engine, has coolant valve for loading air cooler with coolant from low temperature coolant circuit and engine coolant circuit downstream engine block and upstream to engine cooler |
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2010
- 2010-12-18 DE DE102010055072A patent/DE102010055072A1/en not_active Withdrawn
-
2011
- 2011-12-05 EP EP11794043.7A patent/EP2652305B1/en active Active
- 2011-12-05 CN CN2011800677469A patent/CN103370524A/en active Pending
- 2011-12-05 WO PCT/EP2011/006084 patent/WO2012079715A1/en active Application Filing
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| CN1914412A (en) * | 2004-02-01 | 2007-02-14 | 贝洱两合公司 | Arrangement for cooling exhaust gas and charge air |
| WO2006134458A1 (en) * | 2005-06-14 | 2006-12-21 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas re-circulation apparatus for internal combustion engine |
| CN101184910A (en) * | 2005-07-28 | 2008-05-21 | 奥迪股份公司 | Cooling system for a vehicle, and method for the operation of a cooling system |
| JP2007263034A (en) * | 2006-03-29 | 2007-10-11 | Isuzu Motors Ltd | Engine cooling water circuit |
| FR2908457A3 (en) * | 2006-11-10 | 2008-05-16 | Renault Sas | Recycled exhaust gas cooling system for e.g. oil engine of motor vehicle, has main circuit, and secondary circuit with secondary valve for limiting or preventing circulation of liquid in secondary circuit when cooling is not required |
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| EP2088295A2 (en) * | 2008-02-11 | 2009-08-12 | Pierburg GmbH | Method for controlling a motor vehicle combustion engine assembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110719988A (en) * | 2017-06-09 | 2020-01-21 | 日立汽车系统株式会社 | Cooling device and cooling method for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102010055072A1 (en) | 2012-06-21 |
| EP2652305B1 (en) | 2018-02-21 |
| EP2652305A1 (en) | 2013-10-23 |
| WO2012079715A1 (en) | 2012-06-21 |
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