• 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 device (100) for measuring the flow rate of a gas injector (1), having a measuring chamber (10; 10a; 10b; 10c) for at least indirect arrangement of an outlet region of a gas injector (1) with a measuring chamber (10; 10a; 10b, 10c), by means of which an outlet cross-section of the measuring chamber (10; 10a; 10b; 10c) and the pressure prevailing in the measuring chamber (10; 10a; 10b; 10c) is adjustable, and with first measuring means (12 ) for detecting parameters of the gas prevailing in the measuring chamber (10; 10a; 10b; 10c). According to the invention, it is provided that the valve device (18) is designed to completely close the outlet cross-section of the measuring chamber (10; 10a; 10b; 10c).
    公开号:AT518155A2
    申请号:T50855/2016
    申请日:2016-09-26
    公开日:2017-07-15
    发明作者:Majer Clemens；Hartung Iris；Muelders Stefan；Fischer Thomas
    申请人:Bosch Gmbh Robert；
    IPC主号:
    专利说明:

    description
    State of the art
    The invention relates to a device for flow measurement of a gas injector according to the preamble of claim 1. Furthermore, the invention relates to a method for flow measurement of a gas injector using a device according to the invention.
    A device for measuring the flow rate of a gas injector according to the preamble of claim 1 is known from EP 2 192 389 A1. The known device has a measuring comb, which can be connected to the exhaust area of a gas injector. such that the gas volume discharged by the gas injector during an injection stroke flows into the measuring chamber. Furthermore, first measuring means in the form of, for example, temperature and pressure sensors are arranged in the measuring chamber. The measuring chamber furthermore has a valve device, by means of which, on the one hand, it is possible to regulate the outflow diameter of the outflow nozzle edge from the measuring comb, and, on the other hand, it is coupled to a measuring device for detecting the total quantity of gas. which was injected into the measuring chamber by means of the gas injector.
    It is essential in the case of the known from the step mentioned process or its method for flow measurement. during the measurement of the amount of intake of the gas injector the Ventiieinrichiung remains at least partially open, d, h. an Ah flow of gas from the measuring chamber takes place. In such a measuring method, it is therefore very difficult to determine the amount of gas injected from the gas injector into the measuring chamber during a single injection process. However, since with regard to the correct function or the detection of, for example, manufacturing stoierzzen it is desirable to determine variations between the individual injection processes, this is mittele the known device or by means of the known method only very difficult or not possible. In addition, 'it is mentioned that the installation of a gas injector is to be simulated by sine Such .Messkammer usually in Saugrohrhereich a Brennkraftmaschlne by the simulation can be detected very precisely during the actual operation in a Srennkraftmaschina by the gas injector gas quantity. Such a typical installation situation in a suction pipe is characterized by the fact that not only overpressures in the intake pipe occurrence, but you a suppression with open Lufteiniassventii on the cylinder, so that, for example, a Absnlutdruck of G, 5bar prevails. Since in the known device only the Durehfiussquerschniit can be influenced at the Venüleinrichtung, however, only overpressures can be simulated with such Messkammar, however, takes revenge in real practice occurring in a mounting situation on a suction pipe negative pressures.
    Disclosure of the invention
    Based on the dargestalifsn state of the art, the invention has the object, even with a relatively small number of Gaseinbiasungen or a few strokes of Gassnjektons, ideally already in a single Elnblasvcrgang to determine the output of the gas injector gas or gas mass with high accuracy In particular, the measurement should also be able to take place under conditions which correspond to a real installation location, ie. that by means of the device also back pressures at Ausiassbereich the Gaslnjektors can be simulated, which are designed not only as an overpressure, but also as a suppression.
    This object is achieved in a device for flow measurement of a Gaslnjektors with the characterizing features of claim 1. The invention is based on the idea to use the Ventileinnchtung, which serves in the prior art as Crsssalvorrichlung for setting a Dresseiabschnitts to stay closed during the actual measurement, thereby on the one hand set in the measuring chamber pressure during the actual measurement On the other hand, it is very easy to accurately and accurately measure the varying parameters in the measuring chamber which occur in the case of a few or a single gas injection. This is achieved by avoiding outflow of gas from the measuring chamber through the closed valve device. For this purpose, it is provided that the valve device is designed to completely close the outlet cross section of the measuring chamber.
    Advantageous developments of the device according to the invention for flow measurement of a Gaainjektors s; nd listed in the dependent claims.
    In a most preferred structural design of the device, it is provided that the connected to the measuring chamber valve device is connected to a Unterdruekeueila which serves to adjust the pressure in the measuring chamber. Such a vacuum source thus makes it possible, before the actual measurement with the valve device open in the measuring chamber to set a certain negative pressure in the measuring chamber, which can typically be up to about G, 6 bar absolute pressure in the measuring chamber. On the other hand, the device according to the invention makes it possible, for example by a certain number of gas injections by the gas injector, to set a specific overpressure in the measuring chamber before the actual measurement. It can thus be simulated or adjusted in the installation shell in an internal combustion engine back pressures on the Auslessseite the Gasventiis. For example, in the case of a simulated installation of the gas injector, which is designed to inject directly into the combustion chamber of a cylinder, it may be provided to scoop an absolute pressure between Ibar and ISObar in the measuring chamber.
    Therefore, in a preferred range of variation of the adjustable pressures in the measuring chamber, this is between 0.5 bar and 1 absolute absolute, depending on the simulated installation situation. As a result, the pressures typically prevailing during actual installation conditions of a gas injector in a suction pipe or a cylinder in a brine cooking machine are simulated.
    In order to determine average values of the amount injected into the measuring chamber and an average pressure increase over a certain number of gas injections by the gas injector, it may be provided that the
    Valve device is at least indirectly coupled to a measuring device for measuring the effluent from the measuring chamber gas.
    Another aspect of the invention relates to the advantageous embodiment of the device, wherein the inlet region of the gas injection is connected to a pressure chamber for supplying the gas injector with gas, wherein the pressure chamber is coupled to a supply source for the gas. By means of such a pressure chamber can supply the gas injector with a gas, dessert parameters (irrsbesondere pressure and temperature) can be specified very accurately, whereby the measurement results can be reproduced very accurately, in particular, it is important for the correct calculation of Einblasmasse home gas injector Know parameter of the gas supplied to the gas injector.
    For this purpose, it is provided in a development of the last-mentioned pressure chamber, that the pressure chamber second measuring means for detecting at least the pressure prevailing in the pressure chamber and the temperature. Like the first measuring means provided in the measuring chamber, such second measuring means may comprise, for example, conventional temperature sensors or pressure sensors, or else oval ice sensors, by means of which the speed of sound of the gas and, in turn, the parameters of the gas can be determined.
    Since such a device designed various possibilities for changing the parameters, for example, the pressure and the temperature of the gas in the pressure chamber to supply the gas injector with the gas and the adjustment of the pressure in the measuring chamber on the ünterdruckeinrichtung and the Ventiieinrichtung, it is in one further, preferred embodiment of the invention provided that the device has a (central) control and evaluation for controlling the gas injector, for the evaluation of prevailing before and after the Bnblasvorgang the Gasinjekiors parameters and Ansuing the Unterdruckeinrlchtung and the VersorgungsqueOe. In these It should be noted that it is necessary for accurate detection of the temperature and pressure sn of the measuring chamber before and after the embedding process, for example to detect the pressure and the temperature as directly as possible during or after the injection process in the measuring chamber. Typically, such measurement should take place in the range of 1 ms to 4 ms, for example, in order to determine a sufficiently accurate betting for the temperature or pressure in the measuring chamber.
    A further aspect of the invention relates to the possibility of being able to use the device not only for experimental purposes or in the laboratory of test laboratories but, for example, in the series production of gas injectors in the selection test of manufactured gas injectors. For this purpose, it is provided in a further embodiment of the invention that means for automated coupling of Gasinjekiors are provided with the measuring chamber and the pressure chamber. Such means may, for example, consist in the use of workpiece carriers via which a gas injector {automated} is fed to the test or measuring device and is coupled thereto on the input side and on the output side.
    Since, as explained above, the device according to the invention is basically suitable for testing / testing a wide variety of gas valves. Depending on Einsatzzwack per injection process have different injection volumes, a further aspect of the invention relates to the adaptation of the device described so far to the respective gas valve to be checked. The goal here is it. to be able to present a highly accurate single-quantity measurement over a very large measuring range. Against this background, an advantageous embodiment of the invention relates to a modular design of the measuring chamber, by means of which a measuring chamber volume can be optimally adapted to the particular gas injector to be tested. In particular, such a modular design of the measuring chamber makes it possible to enlarge or expand the measuring chamber volume in a particularly simple manner by using edible eggs in a particularly simple manner. In particular, it is provided that the measuring chamber consists of a plurality of modularly composable measuring chamber elements, wherein depending on the measuring chamber elements used and / or their number, the Messkamrnervolumen is variable. Under modular composable measuring chamber elements are Messkammarelamante understood that can be easily connect or replace using conventional fasteners. These should also preferably have standardized mechanical interfaces in order to facilitate the conversion or adaptation of the measuring chamber. To ensure the tightness after the formation of the desired measuring chamber vofumen, it may in particular also be provided that sealing elements or sealing measures are provided or provided between the individual measuring chamber elements.
    Regardless of the particular specifically designed Meßkammervoluroen it is in a particularly advantageous embodiment of the measuring chamber, which makes it possible always at least partially equal Mssskammereiemente to be provided, that the measuring chamber at least a first measuring chamber element to form a connection for the Gassnjektor and a second Measuring chamber element for forming a MessKammerauslesses, wherein the second measuring chamber element is at least indirectly connected to the valve means Furthermore, it may be provided that the first and / or second Messkammereiement is designed such that they serve to arrange the first Meßmltiel.
    In order to obtain the most accurate measurement results, it has in addition harausgesiaiii advantageous when the measuring chamber has the highest possible natural frequency. Such a highest possible natural frequency can be achieved in that the height / width ratio of the interior of the measuring chamber as possible corresponds to 1, Ö.
    The invention furthermore comprises a method for measuring the flow rate of a gas injector by means of a device according to the invention described so far, the method having at least the following steps:
    First, the gas pressure in the measuring chamber is set to a desired value (negative pressure or overpressure). Thereafter, a complete closing of the valve device takes place at the measuring chamber. Subsequently, at least one picking process takes place in the measuring chamber by the gas injector. In this case, at least the pressure and the temperature are detected (immediately) before and after the blowing into the measuring chamber. By means of the detected values, the gas mass injected into the measuring chamber by the gas injector during the at least one injection process is expressed according to the formula:
    determined, where
    Pa ™ Pressure after injection P1 ™ Pressure before injection 12 ~ Absolute temperature after injection Tt ~ Absolute temperature before injection Rs2 ~ Special gas constant after injection Rs1 ~ Special blowing constant before injection V2 ~ Chamber volume after injection VI ~ Carnage volume before the insufflation.
    In a preferred embodiment of the inventive method described so far, which is particularly suitable for detecting or determining statistical deviations of individual Einblasvorgänge, it is provided that after a blowing the valve device is opened and then completely closed again, so that after closing the valve is set to the gas pressure in the measuring chamber that was initially set before blowing
    The device described so far is also able to determine the occurring during a single Einblasvorgange temporal pressure curve and the bit quantity. For this purpose, a method is provided in which the pressure and the temperature in the measuring chamber (10) are continuously detected during and after a blowing process, and that the instantaneous injection time of the gas injector {1} is determined according to the following formula:
    With: px - pressure after injection at time x P-i ~ pressure before injection Τχ ~ Absolute temperature at time x T: "Absolute temperature before injection
    Rx ~ Special gas constant at time x Rs1 ~ Special glass particles before injection f2 ~ Combs at time x VA ~ Ksmmervclumen before injection
    Since in particular the multiple detection of the temperature in the measuring chamber during a single Einbiasvorgangs is very difficult, it may be provided in a development of the last-described method, that prevailing at a time x in the measuring chamber temperature on the basis of one of the temperatures before and after blowing and the pressures before and after the injection as well as at a time x during the injection-dependent function is calculated.
    In order furthermore to be able to determine average values of the amount of a single gas injection in a particularly simple manner, in particular if a measurement of the temperature can not take place, it is provided that the gas quantity of the gas injector discharged from the metering chamber after each injection operation is detected by the measuring device , and that, after a certain number of gas injections of the gas injector, it is concluded from the total amount of gas withdrawn from the measuring chamber and from the number of pressure rises in the measuring device that an average injection quantity is achieved during injection.
    Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing.
    This shows in:
    1 shows a schematic representation of a device according to the invention for measuring the flow rate of a gas injector,
    Fig., 2 and
    Fig. 3 each in a simplified longitudinal section, a schematic
    Construction of a modular measuring chamber with different measuring chamber volumes and
    Fsg. 4 and
    Flg. 5 partial longitudinal sections through further, differently formed, modular measuring chambers,
    The same components or components with the same function are provided in the figures with the same Bszugsziffern. FIG. 1 schematically shows a device 100 for measuring the flow rate of the gas mass emitted by a gas injector 1 during at least one injection stroke. The gas injector 1 is, in particular, a gas injector 1, as can be used in internal combustion engines in motor vehicles for driving the motor vehicle, the gas injector 1 typically being arranged in the intake region of a cylinder in front of the inlet valve in the region of a suction pipe.
    The device 100 comprises a measuring chamber 10 with an interior 11 which is at least indirectly coupled to the Ausiassbereich of the gas injector 1, such that during the at least one Einblasvorgangs or, Einbiashubs emitted by the gas injector 1 gas quantity flows into the interior 11 of the measuring chamber 10 , within the inner space 11 are first Messmittei 12, comprising at least one pressure sensor 13 and a temperature sensor 14, and possibly other sensors 15, for example, designed as Uitschschalisensoren arranged. The first measuring means 12 are coupled via an input connection 18 with a central control and Auswäreinheit £ 0. In addition, the measuring chamber 10 is connected to a Ventiisinrichtung 18, which forms a connection to the interior 11 of the measuring chamber 10.
    On the side facing away from the measuring chamber IG or the inner space 11 side of the vent device 18 are in operative connection with the Ventiisinrichtung 18 optionally one connected via a line 21 to the control and evaluation unit 20 connected measuring device 22 for continuous recording of the pressures and amounts from the measuring chamber 10 ausgeieiteten gases and a ünterdruckeinrichtung 25 angecrdnet, the latter example further sensors 26 for pressure and / or temperature detection has, and wherein the other sensors 26 are also coupled via a line 27 to the control and evaluation unit 20. The valve device 18 or, whose cross-section is formed changeable, such that the valve device 18 is completely closed, to avoid escape of gas from the Mssskammsr 10. In addition, the valve device 18 or its cross section can be varied in this way. that during an actuation or an activation of the negative pressure device 25 in the at least partially open valve device 18 in the measuring chamber 10, for example, a suppression of a maximum of 0.5 bar can be set absolutely.
    The gas injector 1 is also coupled via a Ansleuerieitung 2 with the (central) control and evaluation unit 20, such that the operation or control of the Gasinjekiors 1 by means of the control and evaluation unit 20 takes place.
    The gas injector 1 can be coupled to means 50, in particular in the form of a workpiece carrier and not shown connecting means which automates a gas injector 1 with the measuring chamber 10 and the
    Connect pressure chamber 30.
    On the input side, the gas injector 1 is coupled to a pressure chamber 30, which supplies the gas injector 1 with the gas. In this case, the pressure chamber 30 is in turn connected in operative connection to a supply source 31. The supply source 31 can be pressed by the control and evaluation unit 20 via a control line 32 in order to influence the pressure of the gas prevailing in the interior 33 of the pressure chamber 30. By means of the pressure chamber 30, the gas injector 1 is supplied with gas under pressure, within the interior 33 of the pressure chamber 30 are also second Meßmlitel 34, comprising at least one temperature sensor 35 and a pressure sensor 36 is arranged. In addition, further sensors 3 '', for example in
    Form of ultrasonic sensors, be provided. The second measuring means 34 are connected via an input line 38 to the control and evaluation unit 2D.
    Be the measurement of the injected from the gas injector 1 in the measuring chamber 10 gas mass is set via the Ventiiein.nchtung 18 and the Ünterdruckquelle 25 in the measuring chamber 10 and whose interior 11 a certain (initial) pressure. In addition, the gas injector 1 is supplied with gas of known temperature and pressure via the pressure chamber 3ö. Immediately before the embedding process of the Gesinjektors 1 in the interior 11 of the measuring chamber 10, the pressure and the temperature of the gas 11 located in the inner space 11 is detected by means of the first Messmittei and fed to the control and Auswerteeinhsif 20 as an input variable. Likewise, after the end of the injection process of the gas through the gas injector 1 into the measuring chamber 10, the pressure and the temperature in the interior 11 of the measuring chamber 10 are detected and supplied to the control and Äuswerteeinheit 20 as an input variable. This calculates the trade fair m the gas injected by the gas injector 1 on the basis of the following formula:
    With: p2 ~ Pressure after injection P1 ~ Pressure before injection 12 = Absolute temperature after injection Ϊ1 ~ Absolute temperature before injection Rs2 ~ Special gas constant after injection Rs1 ~ Special glass constant before injection V2 ~ Chamber volume after injection VI ~ Chamber volume before injection.
    After the measurement, the gas injected into the measuring chamber 10 from the gas injector 1 is discharged via the sin valve device 18 out of the measuring chamber 20 and optionally via the measuring device 22. By timely renewed complete closure of Veniileinnohfung 18 is the desired
    Initial pressure in the measuring chamber 20 set for the subsequent measurement. For the coat of several measurements read! Initially, the measuring device 22 calculates a gas volume blown from the gas injector 1 into the measuring chamber 20 via a division by the number of measuring cycles, or a corresponding gas mass, as well as an average pressure increase.
    2 and 3 each have a measuring chamber 10a dargestelii which consists of modularly composable Meßkammersiementen 51 to 54. In this case, the measuring chamber 10a comprises at least a first measuring chamber element 51. which is designed for this purpose. to be connected to the gas injector 1 or a connection for the gas injector 1 aufweisl. Furthermore, the measuring chamber 10a comprises a second measuring chamber element 52, in the embodiment shown in the form of a ring, which is designed to be connected at least indirectly to the Veniileinrlchtung 18. A third Messkammereiement S3 is disposed on the opposite side of the first Mssskammerelement 51 and biids a bottom area of the measuring chamber 10a. In addition, the measuring chamber 10a of FIG. 3 has a fourth measuring chamber element 54 above and below the second measuring cam belt 52, which, with the exception of the missing connection or outlet to the valve direction 18, is identical to the second measuring chamber element 52. While the measuring chamber 10a according to FIG. 2 forms an inner space 11a which is approximately spherical, the inner space 11a of the measuring chamber 10a of FIG. 3 is approximately cylindrical. The interior 11a has a height h and width b. In particular, the height / width ratio of the inner space 11a in the measuring chamber 10a shown in FIG. 2 is approximately 1.0,
    FIGS. 4 and 5 show further measuring chambers 10b, 10c with internal spaces 11b. 11c dargesieiit While the measuring chamber 10b according to the Fig, 4 from the measuring chamber elements 61 b to 54b an interior 11b formed, which consists in .Art two mutually juxtaposed Halbkegei, the inner space 11c of the measuring chamber 1öc of Fig. 5, which from the measuring chamber elements 51c to 54c, concave surfaces SS are formed on the respective measuring chamber elements 51c to 54o, respectively. Thereby, an approximately spherical innanraum 11c at the measuring chamber 1öc ausgeiidet.
    The device 100 described so far can be modified or moduled in many different ways and without departing from the idea of the invention.
    Thus, it is not necessary, for example, in the case of gas injectors 1, which are provided for direct injection into a cylinder, to provide a vacuum device 25. Likewise, dispensing with average values on the measuring device 22 can be dispensed with. In addition, by a continuous measurement of the pressure (and, if possible, temperature) in the measuring chamber 20, the time course of the injection pressure and the amount of infiltration during a single injection through the Gasinjektcr 1 can be determined.
    权利要求:
    Claims (14)
    [1]
    jfiy ^ iqHsprüche
    1. Apparatus (1 OG) for measuring the flow rate of a gas injector (1), comprising a measuring chamber (10; 10a; 10b; 10c) for at least indirect arrangement of an outlet region of a gas injector (1) with a measuring chamber (10; 10c) is adjustable by means of an outlet cross-section of the measuring chamber (10; 10a; 10b; 10c) and the pressure prevailing in the measuring chamber (10; 10a; 10b; 10c), and by means of measuring means (12). for detecting parameters of the gas prevailing in the measuring chamber (10; 10a; 10b; 10c), characterized in that the oscillating device (18) is designed to completely exclude the outlet cross section of the measuring chamber (10; 10a; 10h; 10c) close.
    [2]
    2. Device according to claim 1, characterized in that; in that the valve device (18) is connected to a uniaxpression direction (25) which serves to set the pressure in the measuring chamber (10; 10a; 10b; 10c).
    [3]
    3. Device according to claim 1 or 2, characterized in that the valve direction (18) is at least indirectly coupled to a measuring device (22) for measuring the gas flowing out of the measuring chamber (10; 10s; 10b; 10c).
    [4]
    4. A device according to claim 2 or 3, characterized in that the pressure in the measuring chamber (10; 10a; 1öb; 10c) is adjustable between 0.5bar and 3bar and / or between Ibar and ISObar.
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the Einiassbereich of the gas injector (1) with a pressure chamber (3D) for supplying the gas injector (1) is connected to gas, and that the pressure chamber (30) with a Versorgungsqueile (31) is coupled to the gas,
    [6]
    6. Apparatus according to claim S, characterized in that in the pressure chamber (30) second measuring means (34) for detecting at least the in the pressure chamber (30) prevailing pressure and the temperature are provided.
    [7]
    7. Apparatus according to claim 5 or 6, characterized in that sine control and evaluation device (20) for controlling the gas injector (1), for evaluating the before and after the Einbiasvorgang of the gas injector (1) in the measuring chamber (10; 10b, 10c) prevailing parameters of the gas and for controlling the vacuum device (26) and the supply reef (31) is provided.
    6. Device according to one of claims 5 to 7, characterized in that means (50) for the automated coupling of the gas injector (1) with the measuring chamber (10; 10a: 10b; 10c) and the pressure chamber (30) are provided. 5. Device according to one of claims 1 to 8, characterized in that the measuring chamber (10a; 10b; 10c) consists of a plurality of modular combinable measuring chamber elements (51; 51b; 51c, 52; 52b; 52c, 53; 53b; 53c; 54; 54b; 54c), and depending on the used Meßkammereismente (51; 51b; Sie, 52; 52b; 52c, S3; 53b; 53c, 54; 54b; 54c) and / or their number the volume of the (10a; iöb; 1öc) is changeable.
    [8]
    10. Apparatus according to claim 9, characterized in that the measuring chamber (10a; 10b; 10c) at least one first measuring chamber element (51; 5b; 5c) for forming a connection for the gas injector (1) and a second Messkammereiement (52; 52b; 52c ) for forming a measuring chamber outlet, the second measuring element (52; 52b; 52c) being connected at least indirectly to the valve means (18)
    [9]
    11. Apparatus according to claim 8 or 9, characterized in that the preferably at least approximately cylindrical or spherical formed interior (11a, 11b, 11c) of the measuring chamber (10a, 10b, 10c) has a height / width ratio between 0.5 and 1.5, preferably 1.0
    [10]
    12. A method for measuring the flow rate of a gas injector (1) by means of a device (100) according to one of claims 1 to 11, comprising at least the following steps: - filing in a gas pressure in the measuring chamber (10; 10a; 10b; 10c) - Completely closing the valve opening (18), so that no gas can escape from the measuring chamber (10; 10a; 10b; 10c) - performing at least one injection process into the measuring chamber (10; 10a; 10b; 10c) by the gas injector (1). Detecting at least the pressure and the temperature before and after the at least one blowing operation in the measuring chamber (10; 10a; 10b; 10c) - performing a calculation for determining during the at least one into the measuring chamber (10; 10a; 10b; 10c) the gas injector (1) gas of the following formers.

    With; pj ~ pressure after injection P, ~ Darck before injection T; ~ Absolute temperature after injection T-ι ~ Absolute temperature before injection Rsä ™ Special gas constant after injection Rs1 "Special glass constant before injection V * ~ Chamber volume after injection V ~ Chamber volume before injection
    [11]
    13, Method according to claim 12, characterized in that after a blow-in the Ventllelndchtung (18) is opened and then fully closed again, so that after closing the Vaniiiemrichtung (18) the pre-set in the first gas pressure in the measuring chamber (10; 1öa; 1öb; 10c) is set again.
    [12]
    14. The method according to claim 12 or 13, characterized in that before. during and after an embedding operation, the pressure and the temperature ln the measuring chamber (10; 10a; 10b; 10c) are continuously detected, and that the instantaneous mass of the gas injector (1) instantaneously is determined according to the following formula.

    With: px = pressure after injection at time x Pi ™ pressure before injection Tx ~: absolute temperature at time x T; ~ Absolute temperature before injection Rx ™ Special gas constant at time x Rs! "Special glass konetante before injection V2 - Chamber volume at time x Vt ~ Chamber volume before injection
    [13]
    15. The method according to claim 14, characterized in that the temperature (Tx) prevailing at a time x in the measuring chamber (10; 10a; 10b; 10c) is determined on the basis of one of the temperatures (Τ, Τϊ) before and after the injection and Pressure (p ^, p2l px) before and after the injection and at a time x during the injection-dependent function is calculated.
    [14]
    18. A method for Durchfuussmessung a Gasmjeklors (1) mitteis a device (1öö), which is formed according to one of claims 3 Pis 11 characterized in that the after each Einbiasvorgang from the kfesskammet {10; 10a; 10b; 10c) of the gas injector (1) is detected by the measuring chamber {22}, and that, after a certain number of embedding operations of the gas injector (1), the total amount of the gas detected by the measuring device (22) from the measuring chamber (10; 1 c) and from the number of pressure increases in the measuring device (22) is closed to an average injection volume during a blow-in.
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    同族专利:
    公开号 | 公开日
    AT518155B1|2018-09-15|
    DE102015219236A1|2017-04-06|
    AT518155A3|2018-08-15|
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    DE102008040628A1|2008-07-23|2010-01-28|Robert Bosch Gmbh|Fluid i.e. fuel, quantity measuring method for engine of vehicle, involves determining injected fluid quantity from sound velocity of fluid found in chamber and from pressure drop that is measured in chamber during injection of fluid|
    IT1392001B1|2008-11-27|2012-02-09|Aea Srl|METHOD FOR MEASURING THE INSTANTANEOUS FLOW OF AN INJECTOR FOR GASEOUS FUELS|
    DE102010002898A1|2010-03-16|2011-09-22|Robert Bosch Gmbh|Method and device for evaluating an injection device|
    DE102011007611B4|2011-04-18|2022-01-27|Robert Bosch Gmbh|Device and method for determining at least one spray quantity and/or one spray rate of a liquid sprayed with a valve|DE102018203127A1|2018-03-02|2019-09-05|Robert Bosch Gmbh|Method and device for calibrating a pulsating gas flow|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102015219236.9A|DE102015219236A1|2015-10-06|2015-10-06|Apparatus and method for flow measurement of a gas injector|
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