• 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 invention relates to a system for selectively prohibiting the passage of a fluid (1) for a motor vehicle line (13, 16, 18), the system (1) comprises a device for characterizing the fluid (2) for identifying characteristics of the fluid (12). The system (1) also comprises a closure device of the system (3), which according to the identified characteristics can block the passage of the fluid (12).
    公开号:FR3077614A1
    申请号:FR1851029
    申请日:2018-02-07
    公开日:2019-08-09
    发明作者:Stephane Leonard；Laurent DUEZ；Eric Ghenne
    申请人:Plastic Omnium Advanced Innovation and Research SA；
    IPC主号:
    专利说明:

    The present invention relates to a fluid injection system for a motor vehicle. More specifically, the invention relates to a water injection system.
    [0002] Motor vehicles with fluid injection systems are known. These systems generally consist of a tank, a filling tube, a ventilation circuit and a supply line having at its end an injector.
    Among these systems, fuel injection systems (gasoline or diesel) are known in particular, systems for injecting nitrogen oxide reducing agent (an aqueous solution of urea or of a precursor) ammonia) or water injection systems.
    These are used for vehicles comprising an engine with water injection. Here, water is generally injected in the form of droplets, into the air intake manifold, or even directly into the engine cylinders in order to cool the pressurized air from the turbo. The cooled air then continues to travel through the engine cylinders. Thanks to such cooling, it is possible to introduce a greater quantity of air into the cylinders, since the molecules forming the air are less dense. Consequently, combustion is improved.
    A drawback of such a solution is that the repeated injection of water deteriorates the water injection system, the injectors, the engine and the catalysts, in particular because of the presence in the injected water of minerals such as chlorine or calcium. Also, to overcome this problem, it is known to use a deionized water solution, devoid of these abrasive minerals, for the water injection system, the injectors, the engine and the catalysts.
    The supply of deionized water is generally carried out by gravity, the deionized water flowing from a filling orifice located at a higher point, within the vehicle, than the tank.
    [0007] However, the introduction of a fluid other than deionized water into the water injection system, for example tap water, is currently not taken into account in current solutions, which leads to the deterioration of the water injection system, injectors, engine and catalysts. Consequently, when this bad introduction is detected, a posteriori, the wear of certain parts has already taken place and a purging of the whole system is necessary.
    The purpose of the invention is to remedy these drawbacks by providing a system for the selective prohibition of the passage of a fluid for driving a motor vehicle, characterized in that the system comprises:
    - a fluid characterization device making it possible to identify characteristics of the fluid and
    - a device for closing the system which, depending on the characteristics identified, blocks the passage of the fluid.
    Thus, the system according to the invention makes it possible to detect the characteristics of a fluid introduced into a fluid injection system and, if necessary, to prohibit the passage to this fluid, if it does not correspond a predetermined fluid. In other words, the system according to the invention makes it possible to detect the introduction of an undesirable fluid for the fluid injection system and / or for the related systems in fluid connection with the latter and to prevent the propagation of the fluid within elements of the fluid injection system and related systems. To identify whether the introduced fluid corresponds to a predetermined fluid, the fluid characterization device measures characteristic values representative of the introduced fluid. The characteristics measured can all be characteristics representative of a fluid. By way of nonlimiting examples, the characteristics representative of a fluid can be its electrical conductivity, its impedance, its capacity, the speed of sound in the fluid, its dynamic viscosity. When the values of the characteristics detected do not correspond to those of a predetermined fluid, the device for closing the system blocks the passage of the fluid within it and, by extension, it also makes it possible to block the passage of the fluid within the system of injection and related systems.
    Advantageously, the fluid characterization device comprises at least one sensor capable of measuring a first characteristic of the fluid and / or a second characteristic of the fluid, the first characteristic and the second characteristic being different from each other.
    Thus, the characterization of the fluid by the characterization device is based on two different characteristics of the fluid, which makes the final identification of the fluid introduced into the fluid injection system more reliable.
    Advantageously, the fluid characterization device comprises a first sensor capable of measuring the first characteristic of the fluid and a second sensor capable of measuring the second characteristic of the fluid.
    Thus, the characteristics of the fluid are measured by two different sensors, which offers more possibilities for the measurement of these two characteristics. Indeed, the two sensors can implement different technologies and, consequently, measure various and varied characteristics. The two sensors can also be placed at different locations within the water injection system. This different arrangement of the two sensors can be explained by the need for a particular positioning of one of the sensors, within one of the organs of the injection system, to carry out a measurement of a particular characteristic of the fluid.
    Advantageously, at least one of the sensors is a quality sensor capable of measuring the electrical conductivity of the fluid and / or its impedance.
    Thus, it is possible to define with more precision and certainty the fluid which is introduced into the injection system because the electrical conductivity and the impedance of the fluids are characteristics which make it possible to differentiate fluids in a very precise.
    Advantageously, at least one of the sensors is disposed within the pipe.
    Thus, the sensor can identify the characteristic or characteristics of the fluid more easily, within the injection system, which allows a faster characterization of the fluid. Indeed, a sensor positioned within a pipe crossed by the fluid can carry out the measurement more easily. Consequently, the blocking of the passage of the fluid by the closure device of the system of the invention can be implemented earlier when the fluid introduced is an undesirable fluid, which makes it possible to avoid a greater propagation of the fluid. at an early stage of its introduction. As a result, it is possible to avoid having to replace or purge the entire injection system in the event of the introduction of an undesirable liquid. The line of the injection system can, for example, be the filling pipe. In this sense, the sensor can preferably be placed upstream of the filling pipe, with reference to the direction of the fluid when filling the injection system, which makes it possible to carry out the measurement at a very early stage of the filling the water injection system.
    Advantageously, the system closing device comprises at least one solenoid valve.
    Thus, blocking the passage of the undesirable fluid can be controlled electrically, which allows efficient and secure blocking of the fluid.
    The invention also relates to a set of a water injection system and a selective prohibition system for the passage of a fluid as described in one of the preceding paragraphs.
    Advantageously, the water injection system comprises a reservoir and a filling tube allowing the supply of a reservoir and a ventilation circuit, the solenoid valve of the selective passage prohibition system being positioned within ventilation circuit) or, preferably, within the filler neck (13).
    Thus, when the fluid introduced is characterized as an undesirable fluid for the water injection system and for its injection into the related systems of the vehicle, the liquid can be blocked very quickly within the pipe (tubing filling line, ventilation line or injection line), whose relatively small section allows rapid and effective blocking. In the case where the solenoid valve is positioned within the filling pipe, the blocking of the fluid takes place even before a large part of the latter has been able to reach the reservoir. In the case where the solenoid valve is positioned within the ventilation circuit, it is also possible to stop, indirectly in this case, the filling of the tank with the undesirable fluid. In fact, when the solenoid valve completely closes the air passage section within the ventilation circuit, the fluid can no longer flow by gravity and reach the reservoir. This second solution allows the supply of the water injection system to be stopped quickly, without positioning a new element within the filling tube, which does not reduce the passage section through which can drain deionized water, as can sometimes be the case when using large solenoid valves.
    The invention also relates to a process for the selective prohibition of the passage of a fluid in a water injection system of an assembly according to the invention, the process comprising at least the steps of:
    - measurement of at least two characteristics of the fluid by means of the system for selective prohibition of the passage of a fluid;
    - closing of a section of a pipe of the water injection system according to the characteristics measured by means of the selective prohibition system for the passage of a fluid.
    Thus, the method of the invention makes it possible to characterize the fluid with more certainty and then, to prohibit its propagation by closing the section of a pipe of the water injection system. This prohibition can be direct, for example when closing the filler neck of the water injection system. The prohibition may also be of an indirect nature, for example, when the pipe whose section is closed is a ventilation line of the ventilation circuit of the water injection system.
    Advantageously, the closing step begins when the values of the measured characteristics differ from predetermined values.
    Thus, it is defined in advance the acceptable values of characteristics of a fluid considered not to deteriorate the vehicle systems in which it will be used.
    Advantageously, the predetermined values are characteristic values of deionized water.
    Advantageously, the measurement step begins after the detection of a filling event of the filling pipe of the water injection system.
    Thus, the step of measuring the characteristics of the fluid can be carried out very quickly, which makes it possible to perform the step of closing the section of a pipe more quickly, when the fluid introduced does not have characteristics whose values correspond to the predetermined values. The filling event can, for example, be detected using a sensor positioned in the filling pipe, this sensor being configured to detect the opening of a filling hatch or the presence of a liquid. in place of the air present within the filling pipe.
    The invention will be better understood on reading the appended figures, which are provided by way of examples and have no limiting nature, in which:
    - Figure 1 is a diagram illustrating a selective prohibition system according to a first embodiment;
    - Figure 2 is a diagram illustrating a selective prohibition system according to a second embodiment;
    - Figure 3 is a diagram illustrating a selective prohibition system according to a third embodiment.
    We will describe a selective prohibition system 1 of a fluid 12 for driving (13, 16, 18) of a motor vehicle (not shown) according to several embodiments of the invention. The selective prohibition system 1 comprises a device for characterizing the fluid 2 making it possible to identify characteristics of the fluid 12. This system 1 also includes a device for closing the system 3 making it possible, depending on the characteristics identified, to block the passage of the fluid 12 .
    As shown in Figures 1 to 3, the fluid characterization device 2 and the system closure device 3 are positioned within a water injection system 10 which comprises a reservoir 11 capable of storing the fluid 12 introduced via the filling tubing 13. The filling tubing has an inlet port 14 through which the fluid 12 can be introduced into the filling tubing 13, for example by means of a filling gun or 'A pipe carrying the fluid 12 from an upstream system of the vehicle. The water injection system 10 is also provided with a ventilation circuit 15, consisting inter alia of a ventilation line 16 and a valve 17. The water injection system 10 also includes a fluid injection circuit 12 only represented by its injection line 18 and its valve 19. In a conventional fluid circuit, the fluid 12 is introduced through the inlet orifice 14 of the filling pipe 13 and flows through the latter to the reservoir 11, in which the fluid 12 is stored. During the introduction of the fluid 12, the reservoir 11 is ventilated by means of the ventilation circuit 15, in order to evacuate the air present within the reservoir so that the latter does not reach a too high pressure value, which would prevent any additional introduction of fluid 12 into the reservoir 11. In other words, the air present in the reservoir 11 when it is filled, is evacuated by the ventilation line 16 in the direction represented by the arrow F1, when the valve 17 n '' does not obstruct access. Finally, when the injection of fluid 12 stored in the reservoir 11, in this case deionized water, is required at the intake manifold or the engine cylinders (not shown), the deionized water is pumped and sent to the injection line 18, when the valve 19 does not close off the access, all in the direction shown by the arrow F2.
    According to a first embodiment of the invention, shown in Figure 1, the fluid characterization device 2 comprises a single sensor 4 disposed within the filling pipe 13 of the water injection system 10 The sensor 4 is a sensor capable of carrying out measurements relating to at least two different characteristics of the fluid 12. The sensor 4 is a quality sensor and is capable of measuring the electrical conductivity of the fluid and / or its impedance. The fluid characterization device 2 also comprises a processing unit (not shown) which controls the sensor 4, collects and processes the measurements in order to identify the fluid 12 introduced into the filling pipe 13. The closing device 3 of the system 1 comprises a solenoid valve 7 also arranged within the filling pipe 13. This solenoid valve 7 is also controlled by the processing unit. When the characteristics identified indicate that the fluid 12 introduced into the filling pipe 13 is different from deionized water, then the processing unit controls the closing of the solenoid valve 7. The closing of the solenoid valve 7 allows the blocking of the passage of the undesirable fluid 12 which cannot therefore flow into the reservoir 11 and propagate to the other organs of the water injection system 10. Consequently, it is not necessary to have a purge of the reservoir 11, of the ventilation line 16 or of the injection line 18.
    The solenoid valve 7 can also be disposed within any other pipe of the water injection system 10, the closing of its section results in the absence of propagation of the fluid 12 within the system water injection 10 and, consequently, within other vehicle systems.
    Furthermore, in variants of the invention not shown, the closure device 3 may include, instead of the solenoid valve 7, any closure member known to those skilled in the art and whose closure can both be controlled remotely and on request and allows blocking of the passage of the fluid. For example, the closure member may be constituted at least partially by a material having a coefficient of expansion coefficient in contact with certain fluids which are particularly undesirable for the water injection system, such as diesel. The swelling of the part of the closure member causes a progressive blocking of the fluid within the pipe. Alternatively, such a closure member comprising a part capable of expanding comprises a device provided with a spring whose movement, triggered by the expanded portion of the closure member, has the effect of blocking the passage of the fluid.
    The elements common to all the embodiments of the invention have been referenced with the same numbers as those of the first embodiment (Figure 1).
    In a second embodiment of the system 1 of the invention (Figure 2), the characterization device 2 of the fluid 12 comprises a first sensor 4, positioned in the filling pipe 13, and a second sensor 5, positioned in the reservoir 11. The first sensor 4 is able to measure a first characteristic of the fluid and the second sensor 5 is able to measure a second characteristic of the fluid. The first sensor 4 is for example a quality sensor able to measure the electrical conductivity of the fluid, while the second quality sensor is able to measure its impedance. In this embodiment, the solenoid valve 7 of the closing device 3 is positioned within the ventilation line 16. This positioning makes it possible to unclog the filling pipe 13, within which a sensor 4 or other elements can be positioned, while making it possible to block the passage of the fluid 12, indirectly, preventing the ventilation of the reservoir 11. This action also has the consequence that the fluid cannot propagate to other organs of the injection system d 10 or related vehicle systems.
    In the third embodiment (Figure 3), the fluid characterization device 2 further comprises a third sensor 6. This third sensor 6 is here positioned within the injection line 18 and allows to measure a third characteristic of the fluid 12 or of confirming the first characteristic measured by the first sensor 4 and / or the second characteristic measured by the second sensor 5. In these two cases, the characterization of the fluid 12 is carried out more precisely. In this embodiment, the solenoid valve 7 of the closure device 3 is positioned within the injection line 18, thus preventing any propagation of the fluid to related systems of the vehicle, downstream of the injection line, in particular the air intake manifold or the engine cylinders.
    The system for selective prohibition of the passage of a fluid 1 is used as follows. Measurements of at least two characteristics of the fluid 12 are carried out by the characterization device 2 and the closing of a section of a pipe of the water injection system 10 is controlled as a function of the characteristics measured. In other words, if the measured characteristics differ from predetermined values relating to the characteristics of the deionized water, the device for closing the system 3 is actuated in order to block the passage of the fluid 12. Advantageously, the measurements of the characteristics of the fluid 12 5 begin after the detection of a filling event of the filling pipe 13 of the water injection system 10. The detection of the filling event can be implemented by any means known to those skilled in the art , such as the opening of a filling hatch or the detection of the presence of a liquid by one of the sensors present in the system.
    List of references: system for the selective prohibition of the passage of a fluid: device for characterizing the fluid: device for closing the system: first sensor: second sensor: third sensor: solenoid valve: water injection system: surface to be painted of the bodywork part: fluid: filling pipe: inlet opening of filling pipe 13: ventilation circuit: ventilation line: valve: injection line: valve
    权利要求:
    Claims (12)
    [1" id="c-fr-0001]
    1. System for selective prohibition of the passage of a fluid (1) for a pipe (13, 16, 18) of a motor vehicle, characterized in that the system (1) comprises:
    - a fluid characterization device (2) making it possible to identify characteristics of the fluid (12) and
    - a device for closing the system (3) making it possible, depending on the characteristics identified, to block the passage of the fluid (12).
    [2" id="c-fr-0002]
    2. System (1) according to claim 1, in which the fluid characterization device (2) comprises at least one sensor (4, 5, 6) capable of measuring a first characteristic of the fluid (12) and / or a second characteristic of the fluid (12), the first characteristic and the second characteristic being different from each other.
    [3" id="c-fr-0003]
    3. System (1) according to claim 2, wherein the fluid characterization device (2) comprises a first sensor (4) capable of measuring the first characteristic of the fluid (12) and a second sensor (5) capable of measuring the second characteristic of the fluid (12).
    [4" id="c-fr-0004]
    4. System (1) according to claim 2 or 3, wherein at least one of the sensors (4, 5, 6) is a quality sensor capable of measuring the electrical conductivity of the fluid (12) and / or its impedance.
    [5" id="c-fr-0005]
    5. System (1) according to any one of claims 2 to 4, wherein at least one of the sensors (4, 5, 6) is disposed within the pipe (13, 16, 18).
    [6" id="c-fr-0006]
    6. System (1) according to any one of the preceding claims, in which the system closing device (3) comprises at least one solenoid valve (7).
    [7" id="c-fr-0007]
    7. An assembly of a water injection system (10) and a system for the selective prohibition of the passage of a fluid (1) according to any one of the preceding claims.
    [8" id="c-fr-0008]
    8. The assembly of claim 7, wherein the water injection system (10) comprises a reservoir (11) and a filling tube (13) allowing the supply of a reservoir (11) and a circuit for ventilation (15), the solenoid valve (7) of the system for selective prohibition of the passage of a fluid (1) being positioned within the ventilation circuit (15) or, preferably, within the filling pipe ( 13).
    [9" id="c-fr-0009]
    9. A method of selective prohibition of the passage of a fluid (12) in a water injection system (10) of an assembly according to claim 7 or 8, the method comprising at least the steps of:
    - measurement of at least two characteristics of the fluid (12) by means of the system for selective prohibition of the passage of a fluid (1);
    - closure of a section of a pipe (13, 16, 18) of the water injection system (10) according to the characteristics measured by means of the selective prohibition system
    5 passage of a fluid (1).
    [10" id="c-fr-0010]
    10. The method of claim 9, wherein the closing step begins when the values of the measured characteristics differ from predetermined values.
    [11" id="c-fr-0011]
    11. The method of claim 10, wherein the predetermined values are characteristic values of deionized water (12).
    10
    [0012]
    12. Method according to any one of claims 9 to 11, in which the measurement step begins after the detection of a filling event of the filling pipe (13) of the water injection system.
    1/2
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    同族专利:
    公开号 | 公开日
    FR3077614B1|2021-01-15|
    WO2019154934A1|2019-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    WO1999011482A1|1997-09-02|1999-03-11|Alfmeier Präzision AG Baugruppen und Systemlösungen|Fuel tank system especially for motor vehicles and method for controlling and monitoring said system|
    DE10020000A1|2000-04-22|2001-12-06|Audi Ag|Fill level limiting device on motor vehicle fuel tank has electrically operated valve influenced by fill level sensor and at least one further sensor, e.g. tank cover position sensor|
    US20060266307A1|2005-05-27|2006-11-30|Rival Technologies Inc.|Emission control water injection system for diesel engines|
    DE102015217606A1|2015-09-15|2017-03-16|Kautex Textron Gmbh & Co. Kg|Filler neck for a liquid container of a motor vehicle and Überertankungs- and misfuelling protection for a liquid container of a motor vehicle and method for controlling a refueling automatic breaker on a nozzle|
    US20170198661A1|2016-01-12|2017-07-13|Ford Global Technologies, Llc|Direct-injection supercharged internal combustion engine having water injection, and method for operating an internal combustion engine of this type|
    DE102015217613A1|2015-09-15|2017-03-16|Kautex Textron Gmbh & Co. Kg|Operating fluid container system for motor vehicles with improved misfuelling protection|WO2021110780A1|2019-12-03|2021-06-10|Plastic Omnium Advanced Innovation And Research|Aqueous solution injection system installed in a vehicle with a mechanical valve|
    FR3106386A1|2020-01-17|2021-07-23|Plastic Omnium Advanced Innovation And Research|Mechanical valve for an aqueous solution injection system on board a vehicle|
    法律状态:
    2019-02-25| PLFP| Fee payment|Year of fee payment: 2 |
    2019-08-09| PLSC| Publication of the preliminary search report|Effective date: 20190809 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 3 |
    2021-02-26| PLFP| Fee payment|Year of fee payment: 4 |
    2022-02-25| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1851029|2018-02-07|
    FR1851029A|FR3077614B1|2018-02-07|2018-02-07|SELECTIVE FLUID PASSAGE PROHIBITION SYSTEM|FR1851029A| FR3077614B1|2018-02-07|2018-02-07|SELECTIVE FLUID PASSAGE PROHIBITION SYSTEM|
    PCT/EP2019/053051| WO2019154934A1|2018-02-07|2019-02-07|System for the selective prevention of passage of a fluid|
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