• 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 an assembly (1) comprising: - an intake duct (4) extending between an inlet (11) of air and a heat engine (2), - a heat engine (2), - a electric compressor (5) disposed on the intake duct, the electric compressor (5) being configured to allow heating of the intake gas flowing in the intake duct (4).
    公开号:FR3015577A1
    申请号:FR1363113
    申请日:2013-12-19
    公开日:2015-06-26
    发明作者:Aurelien Ramseyer；Philippe Lutz；Julien Marcinkowski；Aurelien Webster
    申请人:Valeo Systemes de Controle Moteur SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates to the field of heating the intake gases of a heat engine, and more particularly to an assembly comprising a heat engine and a configured electric compressor. BACKGROUND OF THE INVENTION to heat the intake gases. The present invention relates to all gasoline engines engines, diesel, gas, ethanol, whether supercharged or not. There are phases of life of the vehicle during which it is interesting to heat the intake gases. These are mainly cold starts, when the engine itself is cold and the temperature of the air admitted is low. Indeed, in this case, the combustion is slowed down and generates more polluting emissions, in particular more unburnt HC and CO type, and particles. This is all the more true as the outside temperature is low.
    [0002] Currently, to heat or heat the intake gases, it is envisaged electric heating systems of the intake gases taking into account the future pollution control constraints according to the Euro 6 standard and beyond. These are, for example, resistors placed directly in the air intake ducts. This solution by electric heating is effective but has two disadvantages: - it is only used to heat the intake gases. The cost of the system is therefore difficult to value, since its utility is reduced to cold starts only, for a duration of a few tens of seconds. - it is intrusive: it is necessary to find a solution of integration of the electrical resistance, and to manage the tightness of the air circuit.
    [0003] In the case of supercharged engines, an intake gas cooling system is necessary for the hot operation of the engine, in order to increase the air mass admitted into the engine. This system is counterproductive during cold starts, when the objective is instead to increase the temperature of the intake gases. In order to avoid cooling, there are bypass systems of this exchanger. However, although this system avoids the cooling of gases, it does not allow to heat them. The present invention therefore aims to overcome one or more of the drawbacks of the prior art admission gas heating systems by proposing an intake gas heating system for a heat engine, equipped with an electric compressor. , requiring no additional device installation for this purpose alone. For this, the present invention proposes an assembly comprising: an intake duct extending between an air inlet and a heat engine, a heat engine, an electric compressor disposed on the intake duct, the electric compressor being configured to allow to heat the inlet gases circulating in the intake duct. According to one embodiment of the invention, the assembly according to the invention comprises at least one valve, disposed upstream of the heat engine and upstream or downstream of the electric compressor, regulating the flow rate of the inlet gases in the thermal motor.
    [0004] According to one embodiment of the invention, the electric compressor is integrated in a first bypass circuit comprising a first bypass means configured to allow the recirculation of a portion of the gases from the electric compressor through said electric compressor during heating. admission gases. According to one embodiment of the invention, the assembly according to the invention comprises a heat exchanger disposed on the intake duct. According to one embodiment of the invention, the heat exchanger is integrated in a second bypass circuit comprising a second bypass means configured so that the inlet gases do not pass through the heat exchanger during the heating of the gases. intake. According to one embodiment of the invention, the electric compressor is disposed upstream of the heat exchanger, and upstream of the valve.
    [0005] According to another embodiment of the invention, the electric compressor is disposed downstream of the heat exchanger, and upstream of the valve. The present invention also relates to a method of heating the intake gases using the assembly according to the invention, comprising: a step of activation of the electric compressor, a step of circulation of the intake gas through the electric compressor , a step of regulating the flow of the intake gases with a valve. According to one embodiment of the invention, the method according to comprises a second step of circulation of the inlet gases through the electric compressor.
    [0006] The present invention also relates to the use of the assembly according to the invention for heating the inlet gases during a start-up phase. The present invention also relates to the use of the assembly according to the invention for heating the intake duct during a pre-start phase. Other objects, features and advantages of the invention will be better understood and will appear more clearly on reading the description given hereinafter with reference to the appended figures given by way of example and in which: Figure 1 is a schematic representation of a first mode of operation of the device according to the invention; - Figure 2 is a schematic representation of a second mode of operation of the device according to the invention.
    [0007] The present invention relates to a heat engine equipped with an electric compressor used to heat the intake gases during the start-up phase or during the pre-start phase. In the remainder of the description, the term electric compressor means an air compressor, whether volumetric or not, centrifugal or radial, for example, driven by an electric motor, in order to supercharge a heat engine. The supercharging keeps the performance of an engine while reducing the engine capacity (downsizing according to English terminology). For a given torque to provide, the load is then greater, which generally leads to better performance and reduced fuel consumption. An electric compressor is used alone or in addition to a turbocharger in order to reduce the response time. The full engine running can be reached faster, which further reduces the engine capacity in order to reduce the average consumption in current use of the engine.
    [0008] The electric compressor is therefore generally activated to increase the density of the intake air. The increase in density is necessarily accompanied by an increase in temperature. In the context of the invention, it is this increase in temperature which is sought. More precisely, the electric compressor is used directly to heat the inlet gases.
    [0009] In the context of the invention, the term "starting phase" is understood to mean the phase during which the engine is put into operation. In the case of the starting phase of the engine, the electric compressor allows at least to heat the intake gases. According to one embodiment, the electric compressor makes it possible at least to heat the intake duct and the inlet gases. In the context of the invention, the term "pre-start phase" is understood to mean the phase prior to starting the engine. In the case of the phase prior to starting the engine, the electric compressor allows at least to heat the intake duct.
    [0010] The assembly 1 engine concerned by the present invention, an embodiment of which is illustrated in FIGS. 1 and 2 with the intake duct 4 of the intake circuit, comprises a motor vehicle internal combustion combustion engine 2 and a combustion engine 2. electric compressor 5.
    [0011] This engine 2 comprises a combustion chamber 3 comprising a plurality of cylinders, four in number in the figures, intended to receive a mixture of oxidant and fuel, and for example gasoline or diesel fuel and air pure or a recirculating air / gas mixture as an oxidant. The combustion in the cylinders generates the work of the engine 2. The operation of the engine 2 is conventional: the gases are admitted into the combustion chamber 3, are compressed, burned and expelled in the form of exhaust gas. This engine 2 has an inlet connected to the intake duct 4 and an outlet connected to a gas exhaust circuit 10. The inlet duct inlet inlet 4 defines the inlet through which the fresh air enters the inlet duct 4. 1 together while the output 12 of the exhaust circuit 10 defines the outlet through which the exhaust gas is discharged from the assembly 1. The intake duct 4 opens into an intake manifold 7 which thus forms a gas inlet box in the combustion chamber 3 of the engine 2. Intake duct 4 is understood to mean the intake duct for the intake gases, the flow of which is represented by the arrow F1, this duct being located between the air intake 11 and the engine 2. According to one embodiment of the invention the intake duct 4 comprises a mechanical compressor 111 of the inlet gas, which is for example a turbocharger.
    [0012] According to one embodiment of the invention, the intake duct 4 comprises a heat exchanger 6, allowing the cooling of the intake gases, and for example the gases from the mechanical compressor 111. This heat exchanger 6 also called "RAS" by the skilled person, which means "charge air cooler"; Its function is to cool the intake gases. The heat exchanger 6 ensures a heat exchange between the intake gases and the heat transfer fluid of the heat exchanger 6. At the outlet of the heat exchanger 6, the gases are at a temperature close to that of the heat transfer fluid heat exchanger 6.
    [0013] According to one embodiment of the invention, upstream of the intake manifold 7 of the gases in the engine 2, the intake duct 4 comprises a valve 8 comprising a butterfly valve whose function is to regulate the flow rate of the fuel. gas for the regulation of the engine speed. This valve 8 is controlled by a motor control unit (also called ECU which means Engine Control Unit according to the English terminology), well known to those skilled in the art, and allows to regulate the amount of air introduced into the engine. In the context of the invention, when the electric compressor is used for the purpose of heating the intake gas, this valve 8 is closed more than if the electric compressor was inactive, as a result of which the amount of air admitted is always the same, but the air is admitted at a higher temperature.
    [0014] According to one embodiment of the invention, the throttle valve 8 is upstream of the electric compressor 5. According to one embodiment of the invention, the throttle valve 8 is downstream of the electric compressor 5. The output of the engine 2 is formed by a manifold 9 of the exhaust gas. The latter is connected to a channel or conduit 124 for exhaust gases forming part of the gas exhaust system. According to one embodiment of the invention, the exhaust circuit 10 comprises a turbine 121, integral in rotation with the mechanical compressor 111 of the intake gases and forming with it a turbocharger. The turbine 121 is driven by the exhaust gas of the exhaust path 124, whose flow is shown schematically by the arrow F2. According to one embodiment, the flow passes through the catalyst 122. The assembly 1 comprises, according to one embodiment, a return loop, not shown, allowing all or part of the exhaust gas flowing in the exhaust circuit 10 to be reinjected into the engine 2. The return loop comprises an outlet opening into the intake duct 4 and through which exhaust gases are reinjected upstream of the engine 2. As illustrated in Figure 1, the assembly 1 comprises an electric compressor 5. This compressor 5 is driven by a not shown electric motor whose control is for example performed by the engine control unit. The electric compressor 5 is arranged in the loop of the intake duct 4. In a first variant of the invention, the electric compressor 5 is disposed upstream of the heat exchanger 6, and the gases coming from the heat exchanger. heat 6 open upstream of the butterfly valve 8 and then into the intake manifold 7.
    [0015] According to another variant of the invention, the electric compressor 5 is disposed upstream of the butterfly valve 8 and the gases from the electric compressor 5 flowing through the valve then open into the intake manifold 7. According to another variant of FIG. the invention, the electric compressor 5 is disposed upstream of the mechanical compressor 111.
    [0016] According to an embodiment of this variant, the electric compressor 5 is disposed upstream of the butterfly valve 8, between the heat exchanger 6 and the butterfly valve 8. According to another variant of the invention, the electric compressor 5 is disposed downstream of the butterfly valve.
    [0017] According to one embodiment of the invention, the electric compressor 5 is integrated in a first branch circuit 51 (also called bypass circuit according to the English terminology) having a first valve-type bypass means 52. The electric compressor can thus be short-circuited by this bypass system. This first bypass valve 52 is for example a butterfly valve. This first bypass valve 52 is for example controlled by the engine control unit. The first bypass circuit 51 in association with the first bypass means 52 generally allows intake gases arriving via the intake circuit 4 to circulate through the electric compressor or to bypass it, by the closure or the opening of the first bypass means 52. The first valve-type bypass means 52 is disposed on a first conduit 510, of the bypass circuit 51, different from that of the electric compressor 5 so that when the bypass valve 52 is closed the intake gases are directed to the second conduit 511 where is placed the electric compressor 5. Thus outside the starting phases, or generally phases not requiring the use of the electric compressor 5, the gases of admission flow in the first conduit 510 and do not pass through the electric compressor 5. According to one embodiment of the invention, when the bypass valve 52 is open the inlet gases flow in the first conduit 510 and through the electric compressor. According to one embodiment, the heat exchanger 6 is integrated in a second branch circuit 61 comprising a second valve-type bypass means 62. In the same way as for the first branch circuit 51 of the electric compressor, this second branch circuit 61 associated with the second bypass means 62 allows the inlet gas to pass through the heat exchanger 6 or bypass it by the closing or opening of the second bypass means 62. According to one embodiment of the invention, the first 61 and the second bypass means 62 are formed by a single valve disposed between the two bypass circuits 51, 61. The invention thus relates to the presence of the electric compressor associated with at least one valve disposed upstream of the inlet of the engine 2. That is to say that the electric compressor heats the inlet gases and compresses them. , and the flow rate of these heated and compressed gases is regulated by a valve. The temperature of the intake air does not vary between the output of the electric compressor 5 and the entry into the engine 2. The term does not vary the fact that the temperature is identical to a few degrees, that is to say say those lost as it flows between the electric compressor and the engine inlet.
    [0018] The operation of the assembly according to the invention is as follows. During a start-up or pre-start phase, the intake gases arrive via the intake duct 4, are directed to the bypass circuit 51 through the valve 52 and pass through the electric compressor. In this configuration, the valve 52 of the electric compressor 5 is in the closed position, the exhaust gases are thus forced through the compressor. The compressor is then activated via the control unit. At this time, the valve-type bypass means 52 is controlled so as to direct the intake gases to the electric compressor 5. The inlet gases pass through the electric compressor 5 and come out heated. In this configuration, the temperature increase is at least 10 ° C and higher. According to the first variant of the invention, the inlet gases thus heated by the electric compressor 5 then pass into the second bypass circuit 61 of the heat exchanger 6 thanks to the second bypass means 62 which is in a position not The gas heated by the electric compressor thus arrives then directly upstream of the valve 8 comprising a butterfly type shutter. The valve 8 is configured to allow the passage in the intake manifold 7, the amount of gas required for combustion. According to the second variant embodiment of the invention, the inlet gases thus heated by the electric compressor 5 arrive directly upstream of the valve 8 comprising a butterfly type shutter. The valve 8 is configured to allow the passage in the intake manifold 7, the amount of gas required for combustion.
    [0019] According to one embodiment of the invention, the electric compressor 5 can be activated when the bypass means 52 is open, so that a part of the flow heated by and coming from the compressor 5 and flowing in the branch 511 crosses the means. bypass 52 in the opposite direction to its normal operation and is mixed with the fresh air entering the compressor 5.
    [0020] This recirculation increases the flow rate through the electric compressor 5, which allows to move away from the pumping phenomenon well known to those skilled in the art and destructive for centrifugal and radial compressors. With this increased pumping margin, it is possible to heat the intake gases even more, resulting in an even higher engine gas temperature. In this configuration, the temperature increase is 50 ° C and higher. The inlet gases thus heated reach the valve 8 butterfly type. The valve is configured to pass a sufficient amount of heated gas for operation of the engine (2).
    [0021] The scope of the present invention is not limited to the details given above and allows embodiments in many other specific forms without departing from the scope of the invention. Therefore, the present embodiments should be considered by way of illustration, and may be modified without departing from the scope defined by the claims.
    权利要求:
    Claims (11)
    [0001]
    REVENDICATIONS1. Assembly (1) comprising: an intake duct (4) extending between an inlet (11) of air and a heat engine (2), - a heat engine (2), - an electric compressor (5) arranged on the intake duct, the electric compressor (5) being configured to allow heating of the intake gas flowing in the intake duct (4).
    [0002]
    2. Assembly (1) according to claim 1, comprising at least one valve (8), arranged upstream of the heat engine (2) and upstream or downstream of the electric compressor (5), regulating the flow of the inlet gas in the heat engine (2).
    [0003]
    3. Assembly (1) according to one of claims 1 or 2, wherein the electric compressor (5) is integrated in a first branch circuit (51) having a first bypass means (52) configured to allow the recirculation of a part of the gases from the electric compressor (5) through said electric compressor during the heating of the admission gases.
    [0004]
    4. Assembly (1) according to one of claims 1 to 2, comprising a heat exchanger (6) disposed on the intake duct (4).
    [0005]
    5. The assembly (1) according to claim 4 wherein the heat exchanger (6) is integrated in a second branch circuit (61) having a second bypass means (62) configured so that the inlet gas passes through not the heat exchanger when heating the intake gases.
    [0006]
    6. The assembly (1) according to one of claims 4 or 5 wherein the electric compressor (5) is disposed upstream of the heat exchanger, and upstream of the valve (8).
    [0007]
    7. Assembly (1) according to one of claims 4 or 5 wherein the electric compressor (5) is disposed downstream of the heat exchanger, and upstream of the valve (8).
    [0008]
    8. A method of heating the intake gas using the assembly (1) according to one of claims 1 to 7, comprising: - a step of activation of the electric compressor (5), - a step of circulating the gases of admission through the electric compressor (5), - a stage for regulating the flow of the intake gases with a valve (8).
    [0009]
    9. The method of claim 8, comprising a second step of circulation of the inlet gas through the electric compressor (5).
    [0010]
    10. Use of the assembly (1) according to one of claims 1 to 7 for heating the inlet gas during a startup phase.
    [0011]
    11. Use of the assembly (1) according to one of claims 1 to 7 for heating the intake duct during a pre-startup phase.
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    同族专利:
    公开号 | 公开日
    WO2015092290A1|2015-06-25|
    CN106030090A|2016-10-12|
    EP3084198B1|2019-12-18|
    FR3015577B1|2018-02-02|
    US20160348620A1|2016-12-01|
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    EP3084198A1|2016-10-26|
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    法律状态:
    2015-12-31| PLFP| Fee payment|Year of fee payment: 3 |
    2016-12-29| PLFP| Fee payment|Year of fee payment: 4 |
    2018-01-02| PLFP| Fee payment|Year of fee payment: 5 |
    2019-12-31| PLFP| Fee payment|Year of fee payment: 7 |
    2020-12-31| PLFP| Fee payment|Year of fee payment: 8 |
    2021-12-31| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1363113A|FR3015577B1|2013-12-19|2013-12-19|ASSEMBLY COMPRISING A THERMAL MOTOR AND A CONFIGURED ELECTRIC COMPRESSOR FOR HEATING GASES OF ADMISSION|
    FR1363113|2013-12-19|FR1363113A| FR3015577B1|2013-12-19|2013-12-19|ASSEMBLY COMPRISING A THERMAL MOTOR AND A CONFIGURED ELECTRIC COMPRESSOR FOR HEATING GASES OF ADMISSION|
    US15/106,493| US20160348620A1|2013-12-19|2014-12-18|Assembly including a heat engine and an electric compressor configured to heat the air-fuel mixture|
    PCT/FR2014/053417| WO2015092290A1|2013-12-19|2014-12-18|Assembly including a heat engine and an electric compressor configured to heat the inlet gases|
    CN201480075702.4A| CN106030090A|2013-12-19|2014-12-18|Assembly including heat engine and electric compressor configured to heat the inlet gases|
    EP14830821.6A| EP3084198B1|2013-12-19|2014-12-18|Assembly including a heat engine and an electric compressor configured to heat the inlet gases|
    KR1020167019229A| KR20160098465A|2013-12-19|2014-12-18|Assembly including a heat engine and an electric compressor configured to heat the inlet gases|
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