• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a motor system (10) with a circuit (21) for recirculating burnt gases from a heat engine (17) equipped with a turbocharger (13, 19), in which the recirculation circuit (21) comprises a turbine (30) for energy recovery receiving the high pressure exhaust gas upstream of the turbocharger.
    公开号:FR3022946A1
    申请号:FR1455947
    申请日:2014-06-26
    公开日:2016-01-01
    发明作者:Pierre-Julian Angelot；Youssef Ismail；Sylvain Decoster
    申请人:Valeo Systemes de Controle Moteur SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to thermal machines and more particularly to internal combustion engines with flue gas recirculation circuit and turbocharger. Many diesel engines fitted to motor vehicles are equipped with turbochargers to increase the pressure of the admitted gases. These turbochargers comprise an air compressor driven by a turbine driven by the exhaust gas pressure. The invention is more particularly concerned with high-pressure exhaust gas recirculation engine systems, in which a fraction of the exhaust gases taken upstream of the turbine of the turbocharger is mixed with the admitted gases, after passing through a EGR valve creating a pressure drop. Such recirculation makes it possible in particular to reduce the nitrogen oxide (NOx) content of the engine exhaust gases. The aforementioned pressure drop results in a loss of energy that is not recovered in the current engines. The invention aims to further improve the performance of turbocharged and recirculated engines of flue gases and achieves this by virtue of the fact that the recirculation circuit comprises an energy recovery turbine receiving the high pressure exhaust gas upstream. turbocharger. Thanks to the invention, part of the energy lost in the current engines can be recovered to reduce fuel consumption. The recirculation circuit preferably includes a cooler downstream of the turbine. The engine system may comprise a valve downstream of the energy recovery turbine, this valve preferably being of the on / off type. The energy recovery turbine may be mechanically coupled to elements of the engine system to provide mechanical energy or to be coupled to an electric generator. The energy delivered by this generator can be used, for example at least in part, to power an electric motor assisting the turbocharger.
    [0002] As a variant, the energy delivered by the generator is used at least in part to supply an electric motor for assisting the crankshaft of the heat engine. The energy recovery turbine can still be mechanically coupled to the crankshaft of the engine or turbocharger.
    [0003] The energy recovery turbine may alternatively be coupled to a compressor of the air intake circuit, other than that of the turbocharger. The heat engine is preferably a diesel engine. The subject of the invention is also a vehicle, in particular an automobile, equipped with a motor system according to the invention.
    [0004] The invention will be better understood on reading the following detailed description, nonlimiting exemplary embodiments thereof, and on examining the appended drawing, in which: FIG. motor architecture according to the state of the art, - Figure 2 illustrates the introduction of an energy recovery turbine in the high pressure recirculation circuit according to the invention, and - Figures 3 to 7 are various examples of engine systems according to the invention, for exploiting the energy recovered by the turbine. The known architecture represented in FIG. 1, also called the motor system, comprises, in a manner known per se, an internal combustion heat engine 17 connected to an air intake circuit 11 in the engine, comprising an air filter 12 in inlet, a turbocharger compressor 13 for compressing air for the engine and a cooler 14 downstream of the compressor 13, for cooling the charge air. A flow control device 16, such as for example a butterfly valve, makes it possible to control the flow of air admitted into the internal combustion engine 17. The latter is connected to an exhaust circuit 18 which comprises a turbine 19 of turbocharger, driven by the exhaust gas, coupled to the supercharger compressor 13 to drive it in rotation. The exhaust circuit 18 also comprises, downstream of the turbine 19, a device 20 for treating the flue gases.
    [0005] A recirculation circuit 21, provided with a cooler 22, captures a portion of the flue gases upstream of the turbine 19, to reinject them with a controlled flow into the engine 17, via a valve 23 called valve EGR that creates a sufficient pressure drop. FIG. 2 shows an architecture 10 according to the invention. It incorporates elements of the known architecture shown in Figure 1, which will not be described again in detail, and the same reference numerals have been used to designate elements identical or analogous by their function. According to the invention, an energy recovery turbine 30 is placed in the flue gas recirculation circuit 21, this turbine producing substantially the same expansion ratio as the valve 23 of the known architecture, thus creating a fall of pressure to bring the gases to reinject at a pressure compatible with this reinjection. Thus, the valve 23 of the state of the art can be replaced by a valve 31 introducing a lower pressure drop, and which is for example operating all or nothing. The rotation of the turbine 30 is used to assist the operation of the vehicle, for example by relieving the alternator in the production of electricity and / or by providing mechanical assistance to the engine or to elements of the engine architecture such as as the turbocharger for example. In the example of Figure 3, the turbine 30 is coupled to an electric generator 33. An electric motor 34 is coupled to the crankshaft 40 of the engine 17, to provide mechanical assistance. This motor 34 is powered at least in part by the electricity produced by the generator 33. In the example of Figure 4, the turbine 30 is mechanically coupled to the crankshaft 40 to assist in its rotation. This coupling can be performed by a transmission 35 which can be of any type, for example belt (s) and / or gears. In the example of FIG. 5, the turbine 30 drives an electric generator 33 as in the example of FIG. 3. A motor 50 is powered at least in part by the energy produced by this generator 33. The motor 50 produces a mechanical assistance to a shaft 51 of the turbocharger, thus contributing to the drive of the compressor 13 of the turbocharger, air supply side. In the example of FIG. 6, the energy recovery turbine 30 is mechanically coupled by means of a transmission 53 to the turbocharger shaft 51, thereby providing mechanical assistance for driving the compressor 13 .
    [0006] In the example of Figure 7, the turbine 30 is coupled to a compressor 60 disposed downstream of the compressor 13 of the turbocharger in the air supply circuit 11, and the compressor 60 contributes to increasing the air pressure of the air engine supercharging, which can relieve the compressor 13. This second compressor 60 is for example placed upstream of the cooler 14. An advantage of the power recovery in the flue gas recirculation circuit is the lack of impact counterpressure on the engine, and this energy recovery can be done without increasing fuel consumption or pollutants.
    [0007] In an application to a motor vehicle, a simulation shows that the maximum energy recovery zone is located on engine operating points where the vehicle is operating at a relatively high speed stabilized, greater than 80 km / h, this which allows for permanent energy recovery where hybrid systems are inoperative. In addition, the extraction of the enthalpy of the recirculation gases makes it possible to undersize the components of the recirculation circuit downstream, being subjected to a lower temperature. If necessary, according to the engine calibration, the valve 31 can be removed. Simulations on a speed vehicle stabilized at 110 km / h, with an engine speed of 2500 revolutions per minute and a gas pressure of 9 bar, show that it is possible to extract about 7 kW isentropic, and this power can, for this point of engine operation, allow the following energy savings: 2.1% consumption gain when the turbine 33 is used to drive an electric generator, compared to a production of electrical energy that would be carried out through 1.5% in case of electric assistance of the engine as illustrated in Figure 3, 2.1% in case of mechanical assistance of the engine as shown in Figure 4, 2.6% in case of electric assistance of the turbocharger, as shown in Figure 5, and 3.1% in case of mechanical assistance of the turbocharger, as shown in Figure 6. Of course, the invention is not limited to the examples illustrated.
    [0008] For example, the architectures illustrated may be modified further, for example by removing the valve 31 from these examples. The invention applies to a land vehicle, naval or air motor, as well as to generator engines and all other applications using a turbocharged heat engine and high pressure recirculation of flue gases. The expression "comprising a" should be understood as being synonymous with "comprising at least one".
    权利要求:
    Claims (12)
    [0001]
    REVENDICATIONS1. Motor system (10) with a circuit (21) for recirculating burnt gases from a heat engine (17) equipped with a turbocharger (13, 19), in which the recirculation circuit (21) comprises a turbine (30) energy recovery unit receiving the high pressure exhaust gas upstream of the turbocharger.
    [0002]
    2. The engine system of claim 1, the recirculation circuit (21) having a cooler (14) downstream of the turbine (30).
    [0003]
    3. Engine system according to claim 1 or 2, comprising a valve (31) downstream of the turbine (30). 10
    [0004]
    4. Motor system according to claim 3, the valve (31) being of the on / off type.
    [0005]
    5. Motor system according to any one of claims 1 to 4, the turbine (30) being coupled to an electric generator (33).
    [0006]
    6. The engine system according to claim 5, the energy delivered by the generator (33) being used at least in part to power an electric motor (50) assisting the turbocharger (13, 51, 19).
    [0007]
    7. Motor system according to claim 5 or 6, the energy delivered by the generator (33) being used at least in part to supply an electric motor (34) for assisting the crankshaft (40) of the engine. 20
    [0008]
    8. Engine system according to any one of claims 1 to 4, the turbine (30) of energy recovery being mechanically coupled to the crankshaft (40) of the engine (17).
    [0009]
    9. Motor system according to any one of claims 1 to 4, the turbine (30) of energy recovery being mechanically coupled to the turbocharger. 25
    [0010]
    10. Motor system according to any one of claims 1 to 4, the turbine (30) of energy recovery being coupled to a compressor (60) of the air intake circuit.
    [0011]
    11. Engine system according to any one of claims 1 to 10, the heat engine (17) being a diesel engine. 30
    [0012]
    12. Vehicle, especially automobile, equipped with a motor system (10) as defined in any one of claims 1 to 11.
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    同族专利:
    公开号 | 公开日
    FR3022946B1|2019-06-28|
    EP3161289B1|2019-07-03|
    US20170159619A1|2017-06-08|
    WO2015197993A1|2015-12-30|
    EP3161289A1|2017-05-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1081368A1|1999-09-03|2001-03-07|Ford Global Technologies, Inc., A subsidiary of Ford Motor Company|Exhaust recirculation system and its method for controlling|
    DE19951096A1|1999-10-23|2001-05-10|Daimler Chrysler Ag|Engine control system for diesel engine with exhaust gas turbocharger, has special mode in which exhaust gas temperature or pressure is increased|
    US20070220885A1|2006-03-22|2007-09-27|David Turner|EGR energy recovery system|
    WO2008062254A1|2006-11-23|2008-05-29|Renault Trucks|Internal combustion engine comprising an exhaust gas recirculation system|
    WO2008075127A1|2006-12-19|2008-06-26|Renault Trucks|Power unit for an automotive vehicle and vehicle including such a power unit|
    WO2008075130A1|2006-12-19|2008-06-26|Renault Trucks|Power unit for an automotive vehicle and vehicle including such a power unit|
    EP2674603A1|2011-02-10|2013-12-18|Toyota Jidosha Kabushiki Kaisha|Exhaust gas recirculation device|EP3210835A1|2016-02-26|2017-08-30|Valeo Systemes de Controle Moteur|Method for monitoring electricity production on a motor vehicle|
    FR3053405A1|2016-06-30|2018-01-05|Valeo Systemes De Controle Moteur|EXHAUST GAS CIRCULATION ASSEMBLY OF A THERMAL ENGINE|
    FR3057622A1|2016-10-14|2018-04-20|Valeo Systemes De Controle Moteur|ENERGY RECOVERY SYSTEM WITH COOLING SYSTEM|
    FR3060664A1|2016-12-21|2018-06-22|Valeo Systemes De Controle Moteur|EXHAUST GAS CIRCULATION ASSEMBLY OF A THERMAL ENGINE|JPH09126062A|1995-11-08|1997-05-13|Isuzu Motors Ltd|Egr device of internal combustion engine having turbocharger|
    JPH09144610A|1995-11-21|1997-06-03|Ishikawajima Harima Heavy Ind Co Ltd|Exhaust gas recirculating device for internal combustion engine with supercharger|
    JP4278939B2|2002-09-06|2009-06-17|三菱重工業株式会社|EGR device for internal combustion engine|
    DE102005048329A1|2005-10-08|2007-04-12|Daimlerchrysler Ag|Internal combustion engine e.g. petrol engine, has exhaust gas recirculation device comprising exhaust gas recirculation pipe between exhaust and suction tracts, and gas pump arranged in pipe for supplying gas into suction tract|
    US7490462B2|2006-02-21|2009-02-17|Caterpillar Inc.|Turbocharged exhaust gas recirculation system|
    EP2196659A1|2008-12-10|2010-06-16|ABB Turbo Systems AG|Two-stage charging system for exhaust gas circulation|
    US20100146968A1|2008-12-12|2010-06-17|Alexander Simpson|Emission system, apparatus, and method|
    DE102011108204A1|2011-07-20|2013-01-24|Daimler Ag|Internal combustion engine for motor vehicle, has actuating device comprising control element by which pressure in the exhaust gas duct is adjustable at branching point|
    WO2013151760A1|2012-04-05|2013-10-10|The Ohio State University|Systems and methods for implementing an open thermodynamic cycle for extracting energy from a gas|
    US9989020B2|2015-05-15|2018-06-05|Ford Global Technologies, Llc|Auto-ignition internal combustion engine with exhaust-gas turbocharging and exhaust-gas recirculation|FR3044366B1|2015-11-30|2019-08-30|Valeo Systemes De Controle Moteur|ENGINE SYSTEM WITH BURN GAS RECIRCULATION CIRCUIT|
    FR3044363B1|2015-11-30|2019-08-30|Valeo Systemes De Controle Moteur|ENGINE SYSTEM WITH BURN GAS RECIRCULATION CIRCUIT|
    FR3047515B1|2016-02-08|2018-02-02|Renault S.A.S|AIR SUPPLY DEVICE OF AN INTERNAL COMBUSTION ENGINE.|
    FR3053408B1|2016-06-30|2020-01-31|Valeo Systemes De Controle Moteur|ENGINE SYSTEM WITH CIRCUIT FOR RECIRCULATION OF BURNED GASES|
    DE102016218808A1|2016-09-29|2018-03-29|Ford Global Technologies, Llc|Self-igniting internal combustion engine with exhaust gas recirculation and method for operating such an internal combustion engine|
    法律状态:
    2015-06-30| PLFP| Fee payment|Year of fee payment: 2 |
    2016-01-01| PLSC| Publication of the preliminary search report|Effective date: 20160101 |
    2016-07-08| PLFP| Fee payment|Year of fee payment: 3 |
    2017-06-30| PLFP| Fee payment|Year of fee payment: 4 |
    2018-06-27| PLFP| Fee payment|Year of fee payment: 5 |
    2020-06-30| PLFP| Fee payment|Year of fee payment: 7 |
    2021-06-30| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1455947A|FR3022946B1|2014-06-26|2014-06-26|ENGINE SYSTEM WITH BURN GAS RECIRCULATION CIRCUIT|
    FR1455947|2014-06-26|FR1455947A| FR3022946B1|2014-06-26|2014-06-26|ENGINE SYSTEM WITH BURN GAS RECIRCULATION CIRCUIT|
    US15/321,265| US20170159619A1|2014-06-26|2015-06-26|Engine system comprising a burnt gas recirculation circuit|
    PCT/FR2015/051736| WO2015197993A1|2014-06-26|2015-06-26|Engine system comprising a burnt gas recirculation circuit|
    EP15753715.0A| EP3161289B1|2014-06-26|2015-06-26|Engine system with exhaust gas recirculation circuit|
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