• 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 device for controlling the quantity of air introduced at the intake of a supercharged internal combustion engine, said engine comprising two exhaust gas outlets (32, 36) each connected to a collector of exhaust (30, 34) of a group of at least one cylinder (121, 122, 123, 124), said device comprising a supercharging device (38) having a turbocharger with a turbine (40) with a double inlet (50) , 52) connected to said exhaust gas outlets as well as an external air compressor (44), and a partial transfer duct (64) of compressed air from the compressor to the turbine inlets. According to the invention, the partial transfer conduit comprises two branches (70, 72) connected to the inlet of the turbine and each carrying valve means (74, 76) controlling the circulation of compressed air in these branches.
    公开号:FR3024178A1
    申请号:FR1457141
    申请日:2014-07-24
    公开日:2016-01-29
    发明作者:Thierry Colliou
    申请人:IFP Energies Nouvelles IFPEN；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a device for controlling the amount of air introduced to the intake of a supercharged internal combustion engine, in particular a stationary engine or for a motor vehicle or industrial vehicle, and to a method of controlling the amount of air for such an engine.
    [0002] As is widely known, the power delivered by an internal combustion engine is dependent on the amount of air introduced into the combustion chamber of the engine, amount of air which is itself proportional to the density of this air.
    [0003] Thus, it is usual to increase this amount of air by means of compression of the outside air before it is admitted into this combustion chamber. This operation, called supercharging, can be carried out by any means, such as a turbocharger or a driven compressor, which can be centrifugal or volumetric. In the case of supercharging by a turbocharger, the latter comprises a rotary turbine, single flow or double flow, connected by an axis to a rotary compressor. The exhaust gases from the engine pass through the turbine which is then rotated. This rotation is then transmitted to the compressor which, by its rotation, compresses the outside air before it is introduced into the combustion chamber. As is better described in the French patent application No. 2,478,736, it is provided, in order to significantly increase this amount of compressed air in the engine combustion chamber, to further increase the compression of the engine. outside air by the compressor. This is done more particularly by increasing the speed of rotation of the turbine and therefore of the compressor.
    [0004] For this, a portion of the compressed air leaving the compressor is diverted to be admitted directly to the inlet of the turbine by mixing with the exhaust gas. This turbine is then traversed by a larger amount of fluid (mixture of compressed air and exhaust gas), which makes it possible to increase the speed of rotation of the turbine and consequently of the compressor. This increase in compressor speed thus makes it possible to increase the pressure of the outside air that will be compressed in this compressor and then introduced into the combustion chamber of the engine.
    [0005] By this, the compressed air has a higher density which allows to increase the amount of air contained in the combustion chamber. This type of supercharged engine, although satisfactory, nevertheless has significant disadvantages.
    [0006] Indeed, the flow rate of the compressed air that is admitted to the inlet of the turbine is not properly controlled, which can cause a malfunction of the engine. Thus, by way of example, in the event of too much compressed air being diverted to the inlet of the turbine, the exhaust gases entering the turbine are cooled too much by this air and causes a decrease overall performance of overfeeding. The present invention proposes to overcome the drawbacks mentioned above by means of a device for controlling the quantity of air introduced at the intake of a supercharged internal combustion engine which makes it possible to meet all the power demands of the engine. engine. The invention presented here also makes it possible to transfer compressed air from the intake to the exhaust even when the mean pressure of the compressed air at the intake is lower than that of the exhaust gases. It suffices only that there are phases during the operating cycle of the engine where the intake pressure is greater than that existing at the exhaust. For this purpose, the present invention relates to a device for controlling the quantity of air introduced at the intake of a supercharged internal combustion engine, said engine comprising two exhaust gas outlets each connected to a collector of exhausting a group of at least one cylinder, said device comprising a supercharging device with a turbocharger having a double inlet turbine connected to said exhaust gas outlets as well as an outdoor air compressor, and a conduit partial transfer of compressed air from the compressor to the inlet of the turbine, characterized in that the partial transfer duct comprises two branches connected to the inlet of the turbine and each carrying valve means controlling the circulation of compressed air in these branches.
    [0007] Advantageously, the branches can each further carry a check valve. One of the branches can be connected to the other of the branches by a connecting pipe. The connecting line may carry means of winnowing. The valve means may comprise proportional valves.
    [0008] The transfer duct may carry means for heating the compressed air circulating therein. The heating means may comprise a heat exchanger.
    [0009] The heat exchanger may include an exhaust gas inlet from the turbocharger turbine and an exhaust gas outlet to the exhaust line.
    [0010] The invention also relates to a method for controlling the amount of compressed air at the intake of a supercharged internal combustion engine, said engine comprising two exhaust gas outlets each connected to an exhaust manifold of a group of at least one cylinder, said device comprising a supercharger with a turbocharger with a double inlet turbine connected to said exhaust gas outlets as well as an outdoor air compressor, and a partial transfer conduit compressed air compressor to the turbine inlet, characterized in that it consists in introducing a portion of the compressed air leaving the compressor in the exhaust gas inlet sections of the turbine.
    [0011] The method may comprise separating the transfer conduit into two branches and controlling the circulation of the compressed air in each of the branches by means of winnowing.
    [0012] The process may involve connecting one of the branches to the other of the branches by a connecting conduit. The method may include heating the compressed air circulating in the transfer conduit before admitting it into the turbine.
    [0013] The other features and advantages of the invention will become apparent on reading the following description, which is given solely by way of illustration and is not restrictive, and to which are appended: FIG. 1 which illustrates an internal combustion engine with its supercharging device according to the invention; FIG. 2 shows a variant of the internal combustion engine with its supercharging device and FIG. 3 illustrates a variant of the internal combustion engine with its supercharging device according to FIG. 1. In FIG. the internal combustion engine 10 comprises at least two cylinders, here four cylinders referenced 121 to 124 from the left of the figure. Preferably, this engine is a direct injection internal combustion engine, especially diesel type, but this in no way discards any other type of internal combustion engine.
    [0014] Each cylinder comprises intake means 14 with at least one intake valve 16, here two intake valves each controlling an intake manifold 18. The intake manifolds 18 terminate at an intake manifold 20 supplied with fuel. by a supply duct 22 for intake air, such as compressed air. This cylinder also comprises exhaust gas exhaust means 24 with at least one exhaust valve 26, here also two valves each controlling an exhaust manifold 28.
    [0015] In the example illustrated, the motor is designed to operate according to a combustion order designated 1-3-4-2. Given this combustion order, the exhaust pipes of the first cylinder 121 and the second cylinder 124, which form a first group of at least one cylinder, are connected to a first exhaust manifold 30 with a first outlet of exhaust gas 32. The third and fourth exhaust manifolds 122 and 123, which form a second group of at least one cylinder, are connected to a second exhaust manifold 34 which has a second exhaust gas outlet. exhaust 36.
    [0016] The two exhaust gas outlets result in a turbocharger 38 for the compression of air and more particularly to the expansion turbine 40 of this turbocharger.
    [0017] As illustrated in FIG. 1, the turbocharger is a double-inlet turbocharger, better known as a "Twin Scroll" turbocharger. This type of turbocharger comprises the exhaust gas-cooled expansion turbine 40 which is rotatably connected by a shaft 42 with a compressor 44. At the turbine, the exhaust gas inlet is divided into two parts. two sections, a first inlet section 46 connected to the first exhaust gas outlet 32 of the first manifold 30 and a second inlet section 48 connected to the second exhaust outlet 36 of the second exhaust manifold Exhaust 34. The exhaust gas 50 from the turbine 40 is conventionally connected to the exhaust line 52 of the engine. The compressor 44 of the turbocharger 38 has an outside air intake 54 fed by a supply line 56. The compressed air outlet 58 of this compressor is connected to the supply duct 22 of the intake manifold 20 by a 60. Advantageously, it can be provided to place a cooling radiator of the compressed air 62 on the pipe 60, between the compressor and the pipe 22.
    [0018] As best seen in FIG. 1, a transfer conduit 64 circulates a portion of the compressed air exiting the compressor 44 to the turbine inlets 46 and 48. More precisely, this partial transfer duct originates on the duct 60, at a point of intersection 66 between the compressor and the cooling radiator 62, and then separates, starting from a junction point 68, into two branches 70 and 72. The branch 70 leads to the inlet 46 of the turbine by its junction with the first exhaust outlet 32 and the branch 72 leads to the other inlet 48 of the turbine by its junction with the exhaust gas outlet 36. Each branch carries valve means 74 and 76, such as a proportional valve, controlled by a control means 78, which can be common to both valve means. This valve thus makes it possible to control the circulation of the compressed air circulating in the branch. Advantageously, each branch also comprises a non-return valve 80 and 82 which prevents the flow of compressed air from the branch to the compressor while preventing the communication of the two branches. This configuration thus makes it possible, during operation of the engine, to take advantage of the zones of low exhaust pressure occurring occasionally in the exhaust manifolds to introduce compressed air into the turbine and thus to increase the flow rate of this turbine and consequently the compressor. This also allows for more efficient boosting for low revs. During operation, if there is a need for a large quantity of air in the cylinders, the valves 74 and 76 are controlled in opening to introduce compressed air from the compressor 44 into the turbine 40. The compressed air leaving the The compressor 44 circulates in the duct 64 and then in the branches 70 and 72 to reach the exhaust gas inlets 46 and 48 of the turbine 40 by bringing a surplus of fluid to the turbine. Thus, the turbine is traversed not only by the exhaust gas from the outlets 32 and 36, but also by compressed air which is added to these gases. As a result, the rotation of the turbine is increased, which causes an increase in the rotation of the compressor and, consequently, an increase in the pressure of the compressed air coming out of this compressor.
    [0019] Of course, the valves 74 and 76 are controlled by the control means 78 so as to admit the amount of compressed air in the turbine that meets the engine's supercharging requirements.
    [0020] The variant of FIG. 2 is distinguished from FIG. 1 by the provision of a connecting pipe 84 between the two branches 70 and 72. This pipe is provided with valve means 86, such as a proportional valve, which, here, is also controlled by the control means 78.
    [0021] One end of this conduit is connected to the branch 70 at a point between the valve 74 and the exhaust gas outlet 32 and the other end at a point between the valve 76 and the outlet of the valve. Exhaust gas 36. This conduit controls the fluid communication between the two branches arriving at the turbine. More precisely, this connecting pipe makes it possible to deflect a part of the compressed air circulating in one of the branches to introduce it into the other of the branches by mixing with the exhaust gases at the inlet of the turbine 40 In addition, the connecting pipe makes it possible to reduce the differential pressure of the exhaust gas (or pulsating exhaust) of the other branch which is angularly offset in the combustion cycle of the engine on one branch of the turbine.
    [0022] In FIG. 3, which essentially comprises the same elements as those of FIG. 1, the compressed air leaving the compressor 44 and flowing in the transfer duct 64 is heated before being introduced into the turbine 40.
    [0023] For this, the transfer duct 64 carries a heating means 88 for compressed air, here a heat exchanger in the form of a heating radiator, placed between the point of intersection 66 and the point of junction 68. that includes this 3024 178 9 leads. This radiator is traversed by the compressed air flowing in this conduit while being traversed by the engine exhaust gas. These exhaust gases come from the outlet 50 of the turbine and are fed through a pipe 90 to the inlet 92 of the radiator. The exhaust flows through this radiator by transferring the heat they contain to the compressed air and then emerges from this radiator through the outlet 94 to be directed to the exhaust line of the engine. Thus, a portion of the energy of the exhaust gas is recovered by the compressed air which is introduced into the turbine by one or other of the inputs 46 and 48. This heated compressed air thus makes it possible to provide additional energy to the turbine which, as a result, will run at a higher speed. This high speed of rotation is then transmitted to the compressor which will realize a higher compression of the outside air. 10 15
    权利要求:
    Claims (12)
    [0001]
    CLAIMS1) Device for controlling the amount of air introduced into the intake of a supercharged internal combustion engine, said engine comprising two exhaust gas outlets (32, 36) each connected to an exhaust manifold (30). , 34) of a group of at least one cylinder (121, 122, 123, 124), said device comprising a supercharging device (38) having a turbocharger with a dual input turbine (40) (50, 52) connected to said exhaust gas outlets as well as an external air compressor (44), and a partial transfer duct (64) of compressed air from the compressor to the turbine inlets, characterized in that the duct partial transfer comprises two branches (70, 72) connected to the inlet of the turbine and each carrying valve means (74, 76) controlling the circulation of compressed air in these branches.
    [0002]
    2) Device according to claim 1, characterized in that the branches each further carry a non-return valve (80, 82).
    [0003]
    3) Device according to claim 1 or 2, characterized in that one (70) of the branches is connected to the other (72) of the branches by a connecting pipe (84).
    [0004]
    4) Device according to claim 3, characterized in that the connecting line carries means of throttling (86).
    [0005]
    5) Device according to one of the preceding claims, characterized in that the valve means comprise proportional valves (74, 76; 86).
    [0006]
    6) Device according to claim 1, characterized in that the transfer duct (64) carries heating means (88) of the compressed air circulating therein.
    [0007]
    7) Device according to claim 6, characterized in that the heating means (88) comprise a heat exchanger. 3024178 11
    [0008]
    8) Device according to claim 7, characterized in that the heat exchanger (88) comprises an inlet (92) of exhaust gas from the turbine (40) of the turbocharger and a gas outlet (94) of exhaust to the exhaust line. 5
    [0009]
    9) A method of controlling the amount of compressed air at the intake of a supercharged internal combustion engine, said engine comprising two exhaust gas outlets (32, 36) each connected to an exhaust manifold (30). 34) of a group of at least one cylinder (121, 122, 123, 124), said device comprising a supercharging device (38) with a turbocharger with a turbine (40) with a double inlet (50, 52). ) connected to said exhaust gas outlets as well as an external air compressor (44), and a partial transfer duct (64) of compressed air from the compressor to the turbine inlets, characterized in that it involves introducing a portion of the compressed air exiting the compressor into the exhaust gas inlet sections (46, 48) of the turbine (40).
    [0010]
    10) A method according to claim 9, characterized in that it consists in separating the transfer conduit (64) into two branches (70, 72) and controlling the circulation of compressed air in each of the branches by means of winnowing (74, 76). 20
    [0011]
    11) Method according to claim 10, characterized in that it consists in connecting one of the branches to the other of the panels by a connecting conduit (84).
    [0012]
    12) A method according to claim 9, characterized in that it consists in heating the compressed air circulating in the transfer conduit before admitting it into the turbine.
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    FR3024178B1|2014-07-24|2019-07-26|IFP Energies Nouvelles|DEVICE FOR CONTROLLING THE AIR QUANTITY INTRODUCED TO THE ADMISSION OF A SUPERIOR INTERNAL COMBUSTION ENGINE AND METHOD USING SUCH A DEVICE.|
    FR3035151B1|2015-04-16|2017-04-21|Ifp Energies Now|INTEGRATED DEVICE FOR A CYLINDER HEAD FOR CONTROLLING AN AIR QUANTITY INTRODUCED TO THE ADMISSION OF A SUPERIOR INTERNAL COMBUSTION ENGINE AND METHOD USING SUCH A DEVICE.|
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    DE102015006288A1|2015-05-15|2015-12-03|Daimler Ag|Turbine for an exhaust gas turbocharger, in particular an internal combustion engine, and drive device for a motor vehicle|
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    法律状态:
    2015-07-15| PLFP| Fee payment|Year of fee payment: 2 |
    2016-01-29| PLSC| Search report ready|Effective date: 20160129 |
    2016-07-19| PLFP| Fee payment|Year of fee payment: 3 |
    2017-07-31| PLFP| Fee payment|Year of fee payment: 4 |
    2018-07-25| PLFP| Fee payment|Year of fee payment: 5 |
    2019-07-25| PLFP| Fee payment|Year of fee payment: 6 |
    2020-07-28| PLFP| Fee payment|Year of fee payment: 7 |
    2021-07-26| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1457141|2014-07-24|
    FR1457141A|FR3024178B1|2014-07-24|2014-07-24|DEVICE FOR CONTROLLING THE AIR QUANTITY INTRODUCED TO THE ADMISSION OF A SUPERIOR INTERNAL COMBUSTION ENGINE AND METHOD USING SUCH A DEVICE.|FR1457141A| FR3024178B1|2014-07-24|2014-07-24|DEVICE FOR CONTROLLING THE AIR QUANTITY INTRODUCED TO THE ADMISSION OF A SUPERIOR INTERNAL COMBUSTION ENGINE AND METHOD USING SUCH A DEVICE.|
    JP2017504067A| JP6557719B2|2014-07-24|2015-06-24|Device for regulating the amount of air introduced into a supercharged internal combustion engine and method of using such a device|
    PCT/EP2015/064282| WO2016012187A1|2014-07-24|2015-06-24|Device for controlling the quantity of air admitted to a supercharged internal combustion engine and method using such a device dispositif|
    US15/328,812| US10450947B2|2014-07-24|2015-06-24|Device for controlling the quantity of air admitted to a supercharged internal combustion engine and method of use thereof|
    CN201580041135.5A| CN106574548B|2014-07-24|2015-06-24|Apparatus for controlling air quantity and method using the same|
    EP15732621.6A| EP3172420B1|2014-07-24|2015-06-24|Device for controlling the quantity of air supplied to a supercharged internal combustion engine and method using such a device|
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