EP1769145A1 - Dispositif de regulation thermique d'un moteur a combustion interne - Google Patents
Dispositif de regulation thermique d'un moteur a combustion interneInfo
- Publication number
- EP1769145A1 EP1769145A1 EP05781802A EP05781802A EP1769145A1 EP 1769145 A1 EP1769145 A1 EP 1769145A1 EP 05781802 A EP05781802 A EP 05781802A EP 05781802 A EP05781802 A EP 05781802A EP 1769145 A1 EP1769145 A1 EP 1769145A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- loop
- internal combustion
- combustion engine
- heat exchanger
- exchanger
- 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 22
- 230000001105 regulatory effect Effects 0.000 title abstract 2
- 238000001816 cooling Methods 0.000 claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 8
- 239000002826 coolant Substances 0.000 claims description 14
- 239000007789 gas Substances 0.000 abstract description 20
- 239000012267 brine Substances 0.000 description 22
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 22
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000013529 heat transfer fluid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 231100000719 pollutant Toxicity 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
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
Definitions
- the present invention relates to a thermal control device of an internal combustion engine.
- the invention more particularly relates to a thermal control device comprising at least a first cooling loop of the internal combustion engine and a second cooling loop of the recirculated exhaust gas (EGR).
- EGR recirculated exhaust gas
- the temperature of the exhaust gas, and consequently that of the recirculated gases exceeds a certain threshold which compromises the efficiency of the recirculated gases in the combustion chamber of the engine.
- a solution envisaged for this purpose by the car manufacturers is to implement, in addition to the conventional cooling circuit of the engine, a second cold loop including a heat exchanger liquid coolant / exhaust gas recirculated for cooling said recirculated gas and a heat exchanger thermal air / heat transfer liquid for cooling the coolant, the latter being generally a radiator located at the front face of the engine.
- the use of an additional radiator at the front of the engine has disadvantages in terms of architectural compactness and in terms of cost. This is why the invention aims to provide a thermal control device of an internal combustion engine overcoming all or part of the disadvantages mentioned in the prior art.
- the subject of the invention is a device for the thermal regulation of an internal combustion engine, comprising at least a first cooling loop of the internal combustion engine equipped with at least one heat transfer liquid / air heat exchanger upstream of the engine. a pump and downstream of heat transfer liquid supply means, and a second recirculated exhaust gas cooling loop (EGR) provided with at least one pump, a heat exchanger
- EGR exhaust gas cooling loop
- loops are interconnected respectively downstream and upstream of said exchangers by shunts.
- At least one of the branches comprises a pilot valve that allows among other things to communicate the two loops or isolate them.
- the two liquid / heat exchanger heat exchangers form two non-communicating parts of an exchanger.
- Said heat exchanger is a radiator.
- the heat transfer liquid supply means of the first loop are provided with a valve.
- the second loop is equipped with a non-return valve.
- the invention will be better understood in the study of two particular embodiments described by way of non-limiting and illustrated by Figures 2 and 3. In each figure, the corresponding elements bear the same references.
- FIG. 1 represents a schematic view of a device, known from the prior art, of thermal regulation of an internal combustion engine comprising two distinct and non-communicating cooling loops, intended for one to cool the engine, and for the other to cool the recirculated gases.
- Figure 2 shows a schematic view of a thermal control device of an internal combustion engine according to the invention according to a first architecture.
- Figure 3 shows a schematic view of a thermal control device of an internal combustion engine according to the invention according to a second architecture.
- the internal combustion engine 2 shown in each of the figures conventionally comprises respectively intake ducts 11 and exhaust ducts 12.
- a bypass 18 makes it possible to reinject part of the exhaust gases coming from the exhaust ducts 12 into the ducts.
- intake ducts 11 A controlled valve 9 makes it possible to control the flow rate of the recirculated gases.
- a first loop 13 dedicated to the cooling of the internal combustion engine 2 comprises in particular a heat exchanger 3a coolant / air upstream of a pump 10 and downstream of means 16 for supplying liquid coolant.
- the means 16 for supplying heat transfer liquid are a brine outlet housing.
- a thermostatic valve 7 makes it possible to control the flow of brine in loop 13.
- the exchanger 3a is a radiator traversed by the brine of the loop 13, located on the front face of the engine 2.
- the thermostatic valve 7 opens so that the brine circulates in the loop 13 to cool the motor.
- the radiator 3a ensures the cooling of the brine which has circulated in the engine 2.
- a second loop 14 dedicated to cooling the recirculated exhaust gas (EGR) comprises in particular a pump 5, a heat exchanger 4 EGR / coolant and a heat exchanger 3b coolant / air.
- the coolant circulating in the loop 14 by means of the pump 5, is brine.
- the exchanger 3b is a radiator traversed by the brine of the loop 14, located on the front face of the engine.
- the recirculated gases are cooled in the exchanger 4 by thermally coupling the recirculated gases from the bypass 18, with the brine circulating in the loop 14.
- the brine circulating in the loop 14 is at its cooled tower crossing the radiator 3b.
- the loops 13 and 14 are respectively connected upstream and downstream of the exchangers 3b and 3a by branches 20b, respectively 20a, provided with piloted valves 19b and 19a, respectively.
- the exchangers 3a and 3b form two non-communicating parts of an exchanger 3.
- the two parts 3a and 3b forming the exchanger 3 are arranged in parallel on the aeraulic plane.
- the two parts 3a and 3b forming the exchanger 3 are arranged in series on the aeraulic plane.
- the exchanger 3 is the main cooling radiator of the engine 2.
- piloted valves 19a, 19b are thermostatic valves.
- the device 1 further comprises a non-return valve 6, which makes it possible to limit the counter-flow circulation of the coolant liquid coming from the loop 13 via the bypass 20b.
- This same valve may further comprise a small opening intended to allow the counter-directional circulation of the coolant at a low flow rate.
- the device 1 further comprises a third cooling loop 15 connected to the engine 2 between the brine outlet housing 16 and the pump 10.
- the third loop 15 contains, for example, a heater 17 thermally coupling the coolant with heat transfer fluid. air intended to warm the cabin.
- the thermal regulation device 1 has three operating configurations.
- a first operating configuration when the engine 2 does not need to be cooled, that is to say when the temperature in the brine outlet housing 16 is lower than a threshold S1, the brine does not circulate in the loop 13 since the thermostatic valve 7 is closed. It then becomes possible, if necessary, to open the pilot valves 19a, 19b so that the brine circulating in the loop 14 can be cooled while also flowing in the exchanger 3a. It is thus possible to increase the heat exchange capacity of the loop 14 by using the two heat exchangers 3a and 3b, and consequently to optimize the function of the heat exchanger 4. If, on the other hand, the recirculated gases do not have to be cooled, it is also necessary that the operation of the loop 14 is stopped. The valves 19a, 19b then remain closed and the pump 5 is deactivated. This particular case of operation can be interesting when means of pollution control, such as catalytic converters, are not yet initiated because of a temperature of the exhaust gas sufficient.
- a second operating configuration when the engine 2 needs to be cooled, that is to say when the temperature in the brine outlet housing 16 is greater than S1, the brine circulates in the loop 13 since the thermostatic valve 7 is open.
- the temperature of the brine outlet housing 16 is lower than a threshold S2, that is, as long as the exchanger 3a sufficiently cools the brine circulating in the loop 13, the valves driven 19a, 19b remain closed, so that the brine from the loop 13 can not flow in the loop 14.
- the loops 13, 14 admit a parallel operating configuration that allows to maintain a temperature in the loop 14 less than that in the loop 13.
- the function of the heat exchanger 4 is preserved.
- a third operating configuration when the temperature in the loop 13 exceeds a threshold S2, that is to say when the engine 2 requires a higher cooling, the piloted valves open so that part of the brine out of the loop 13 can flow via the bypass 20b in the exchanger 3b. At the outlet of the exchanger 3b, the brine joins part of the loop 13 via the bypass 20a and remains for the other part in the loop 14.
- this configuration makes it possible to increase the heat exchange capacity of the the loop 13 using the two exchangers 3a and 3b.
- the invention has the advantage of allowing the thermal regulation of an internal combustion engine and its EGR, thanks to a single heat exchanger 3 and two pilot valves, easily integrable at the engine architecture of the engine. its compactness, and which allows to cool modulably the heat transfer fluid from the engine cooling loops and recirculated gases.
- the device 1 may not include the non-return valve 6, which makes it possible to limit the counter-flow circulation of the coolant liquid coming from the loop 13 via the bypass 20b.
- the device 1 as described above may comprise only one piloted valve 19a or 19b. According to another variant embodiment, the device 1 may not comprise the third cooling loop 15 connected to the motor 2 between the brine outlet housing 16 and the pump 10.
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)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Air-Conditioning For Vehicles (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0451439A FR2872546B1 (fr) | 2004-07-05 | 2004-07-05 | Dispositif de regulation thermique d'un moteur a combustion interne |
| PCT/FR2005/050506 WO2006005879A1 (fr) | 2004-07-05 | 2005-06-28 | Dispositif de regulation thermique d'un moteur a combustion interne |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1769145A1 true EP1769145A1 (fr) | 2007-04-04 |
| EP1769145B1 EP1769145B1 (fr) | 2011-04-20 |
Family
ID=34945712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05781802A Expired - Lifetime EP1769145B1 (fr) | 2004-07-05 | 2005-06-28 | Dispositif de regulation thermique d'un moteur a combustion interne |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP1769145B1 (fr) |
| AT (1) | ATE506529T1 (fr) |
| DE (1) | DE602005027573D1 (fr) |
| ES (1) | ES2364972T3 (fr) |
| FR (1) | FR2872546B1 (fr) |
| WO (1) | WO2006005879A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2890697B1 (fr) * | 2005-09-13 | 2009-01-09 | Renault Sas | Moteur de vehicule comprenant un circuit de gaz recircules refroidis a basse temperature |
| DE102009057802B4 (de) * | 2009-12-10 | 2021-01-21 | Volkswagen Ag | Kühlkreislauf für eine Brennkraftmaschine |
| CN103498722B (zh) * | 2013-10-18 | 2015-10-14 | 东风汽车有限公司 | 发动机冷却液浓度自动调节装置及自动调节方法 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19633190B4 (de) * | 1996-08-17 | 2004-02-26 | Daimlerchrysler Ag | Kühlsystem für eine Brennkraftmaschine |
| DE19924398A1 (de) * | 1999-05-27 | 2000-11-30 | Bayerische Motoren Werke Ag | Flüssigkeitsgekühlte Brennkraftmaschine mit einem Abgasrückführsystem |
| DE19960960C1 (de) * | 1999-12-17 | 2001-04-26 | Bosch Gmbh Robert | Wärmeaustauschsystem für die Heizung eines Fahrzeugs mit Hybridantrieb |
| GB0220480D0 (en) * | 2002-09-04 | 2002-10-09 | Ford Global Tech Inc | A motor vehicle and a thermostatically controlled valve therefor |
-
2004
- 2004-07-05 FR FR0451439A patent/FR2872546B1/fr not_active Expired - Fee Related
-
2005
- 2005-06-28 ES ES05781802T patent/ES2364972T3/es not_active Expired - Lifetime
- 2005-06-28 EP EP05781802A patent/EP1769145B1/fr not_active Expired - Lifetime
- 2005-06-28 AT AT05781802T patent/ATE506529T1/de not_active IP Right Cessation
- 2005-06-28 DE DE602005027573T patent/DE602005027573D1/de not_active Expired - Lifetime
- 2005-06-28 WO PCT/FR2005/050506 patent/WO2006005879A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006005879A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1769145B1 (fr) | 2011-04-20 |
| WO2006005879A1 (fr) | 2006-01-19 |
| FR2872546B1 (fr) | 2006-09-01 |
| ATE506529T1 (de) | 2011-05-15 |
| DE602005027573D1 (de) | 2011-06-01 |
| FR2872546A1 (fr) | 2006-01-06 |
| ES2364972T3 (es) | 2011-09-19 |
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