• 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:
    Method and device for calibrating a pump (1) provided in a pumping line (6), the device having an actuator (2) for adjusting the pumping capacity of the pump (1) and a control unit (3). The device has a flow switch (4) in the fuel line (6). The control unit (3) is designed to substantially continuously change the manipulated variable of the actuator (2) when starting the pump (1) up to the switching point (SP) of the flow monitor (4) and to a manipulated variable assigned to the respective switching point (SP) determine and store a manipulated variable difference (Δf) between a reference manipulated variable (fR) stored for the pump (1) and the flow monitor (4) and a calibration manipulated variable (fK) determined during calibration, and the manipulated variable of the actuator (2) to calibrate the pump (1) based on the manipulated variable difference value (Δf).
    公开号:AT514517A2
    申请号:T50807/2014
    申请日:2014-11-05
    公开日:2015-01-15
    发明作者:
    申请人:Avl List Gmbh；
    IPC主号:
    专利说明:

    Method and device for operating a pump
    The invention relates to a method for operating a pump, in particular a Mess¬kreispumpe for fuel consumption measurement in a motor test bench, wherein in the pumping line a flow switch is provided with a certain switching point, Wei¬ters the invention relates to a device for calibrating a vor¬ in a pump line vor¬ The pump has an actuator for adjusting the pump power of the pump and a control unit. The invention further relates to the use of this device for determining a maintenance and / or replacement time for a pump.
    The delivery rate of pumps as a function of the manipulated variable, that is, for example, the adjustment frequency provided by a frequency converter, decreases with increasing wear. An accelerated drop in the delivery rate may indicate a soon failure of the pump.
    This can lead to problems especially in the fuel supply of engine test benches. The execution of test runs on engine test benches is generally associated with high costs, whereby high amounts may be incurred alone for the rental of the test bench for each day. Optionally, individual test runs may run for several weeks, during which test there is generally no possibility to service or replace certain test equipment, such as the measuring circuit pump for the fuel supply of the engine. The failure of a single component towards the end of a test run can thus be very costly because the results of the aborted test are usually worthless and must be repeated. Not only the costs incurred so far for the test have to be taken into account, but also the lost time, which has an impact on the development time. It is particularly annoying when the cause of the termination of a test run and the resulting costs in the failure of a relatively cheap component, as it is about the measuring circuit pump, are.
    The measuring circuit pump is stressed very differently in different test runs, so that usually can not be specified exactly how far the wear of the pump after a test run or several test runs has already advanced. However, this is problematic in two respects: First, the probability of failure of the pump rises sharply from a certain level of wear, on the other hand, the delivery rate of the pump also decreases as wear progresses, and in the worst case, the minimum quantity defined by the developer or the test stand driver for the test run can go below unnoticed become.
    In both cases, the test results are worthless, and it turns out in retrospect that the pump should have been replaced before the test run.
    In order to avoid these risks, the measuring circuit pump is often replaced after only about 30% of the nominal service life, as it can not be determined from the outside how much the pump is actually worn out. While this is a somewhat expensive waste, it is still more cost effective than the cost of a breakdown.
    To avoid these disadvantages, it would be possible to provide a sophisticated sensor in the fuel supply systems to determine the actual degree of wear of the pump by measuring pressure, density and flow rate. However, this is associated with considerable costs and, in addition, the installation of high-quality sensor systems may under certain circumstances increase the potential problems since, in addition to the increased costs for the pump unit, not only the pump but also the sensor system must be regularly maintained and replaced in good time. Due to the considerable need for maintenance also the costs for the workload. For example, flow sensors can also cause a deliberate build-up of pressure, which must be taken into account separately.
    There is therefore a need for methods and devices which make it possible to determine the actual degree of wear of pumps in a simple manner, with low costs and with a high degree of operational reliability, in order to calibrate the pump prior to use in such a way that the intended On the other hand, to determine the degree of wear of the pump with sufficient accuracy to be able to replace the pump in good time before failure.
    In addition to the degree of wear and tear (e.g., bearings, gears, etc.) of the pump, which affect its delivery rate, the delivery rate of commonly used pumps is also very much dependent on the pressure and viscosity of the pumped medium. In the worst case, without elaborate sensor technology for monitoring the current delivery rate, the minimum quantity for fuel supply as defined by the developer / test bench driver can go below unnoticed, especially if one or more of the three main influencing factors - pressure and viscosity of the fuel and wear of the pump - have changed. The results of such a test series would then be unusable.
    One object of the invention is, inter alia, to enable a calibration system with which these factors can be compensated, so that the fuel supply can be readjusted reliably and easily under changed conditions, so that during operation the actual amount of fuel provided for the engine can be determined according to the Vorga¬ben can always be maintained.
    This and further objects are achieved by the method mentioned at the outset, which comprises the following steps: firstly determining a reference manipulated variable for the new pump, for an actuator of the pump by o starting the pump by substantially continuously changing the manipulated variable of the actuator to switching point; and o determining a manipulated variable associated with the switching point and storing said manipulated variable as the reference manipulated variable; - before a pump application, carry out a calibration step on the same pump by: o starting the pump by substantially continuously changing the actuating variable of the actuator to the switching point; determining a manipulated variable assigned to the switching point and defining this manipulated variable as a calibration manipulated variable; determining a manipulated variable difference value between the reference manipulated variable stored for the pump and the flow monitor and the calibration manipulated variable; and o calibrating the actuator of the pump based on Stellgrößenendifferenzwer¬tes.
    The method according to the invention makes use of the fact that the switching point of a simple flow switch barely changes over time and it is also almost independent of the pressure of the pumped medium. Even very simple and cost-effective flow monitors have a very high switching point accuracy over the course of time. In addition, a flow switch or flow switch is very cost-effective to implement and requires only a very small footprint. Also, a flow switch has little effect on the flow behavior of the pumped medium.
    As a manipulated variable, in particular the frequency of a frequency converter of the pump can be seen, wherein a frequency converter is used as an actuator for the pump. However, the invention can also be used with other actuators in a manner known to a person skilled in the art.
    As a "manipulated variable associated with the switching point or" switching point manipulated variable, the respective actuating variable of the actuator, that is to say the frequency of the frequency inverter, is referred to, in which the flow monitor begins to detect the presence of a flow.
    The expression "substantially continuous changing of the manipulated variable" denotes a change in the manipulated variable which causes a sufficiently slow increase in the delivery rate, as the flow rate, of the pump in order to be able to determine the switching point of the flow monitor with the accuracy specified for the application. In particular, a stepwise change of the manipulated variable can also be regarded as "substantially continuous", as long as the steps are small enough to determine the switching point with sufficient accuracy.
    It is not absolutely necessary for the execution of the method to know exactly at which flow value the flow monitor switches exactly, as long as the switching point of a certain flow monitor only ever remains constant. It is therefore not necessary to carry out the method according to the invention to calibrate the flow monitor. Typically, the reference variable for the new pump is determined after installation of the new pump and then used for calibration throughout the life cycle of the pump. The calibration step is repeated before each new use, e.g. a new test run of an engine test bench, wherein the respective pump characteristic over which the amount of fuel to be delivered is controlled in dependence on the manipulated variable, can be readjusted for use on the basis of the determined manipulated variable difference value.The determined manipulated variable difference value should fall outside of a reference range determined for the proper operation of the pump , the pump can be replaced in time before the start of the test run. Even a sudden change in the manipulated variable difference value in the still permissible range can indicate a faulty pump. While the switching point of a flow switch is only insignificantly influenced by the pressure of the medium and hardly changes over time, it depends on the density and the viscosity of the fuel. Advantageously, according to the invention, the density and / or the viscosity of the pumped medium can be determined via a density and / or viscosity sensor, and the difference between the density and / or viscosity of the medium in determining the reference control variable and the density and / or viscosity of the medium at the calibration step may be taken into account in the calibration of the actuator. As a result, the method according to the invention can also be used on the same system and with the same previously determined reference manipulated variable (and a reference density) for calibrating pumps used for pumping changing media of different density. The relationship between the switching point of a flow monitor and the viscosity of the fluid being monitored is usually strictly linear and can be easily taken from the data sheet of the flow monitor. The switching point of the flow monitor can be fixed or adjustable.
    In a further advantageous embodiment, the calibration step can be used to determine a wear value which is characteristic for the wear of the pump on the basis of the variable size difference value. This facilitates the monitoring of the wear state of the pump.
    Advantageously, based on the wear value, a replacement time for the pump can be determined. The wear value can be, for example, a percentage of the desired service life of the pump, it being possible to determine a failure probability for the pump in this test run from this value in conjunction with the planning data of a specific test run. If the probability of failure exceeds a predetermined limit, the pump may be replaced before the start of the test run.
    The invention further relates to a device of the aforementioned type, which has a flow monitor in the fuel line, wherein the control unit is designed to substantially continuously change the manipulated variable of the actuator when starting the pump to the switching point of Strö¬mungswächters and a to determine and store the manipulated variable assigned to the respective switching point; determine a manipulated variable difference value between a reference manipulated variable stored for the pump and the flow monitor and a calibration manipulated variable determined during the calibration; and to calibrate the Stell¬ size of the actuator of the pump based on the manipulated variable difference value. With such a device, the method according to the invention can be put into practice.
    In an advantageous embodiment of the invention, the flow switch may be integrated in the pump. As a result, an extremely compact pump arrangement can be achieved.
    Advantageously, the flow monitor can be a binary sensor. In the context of the present description, a binary sensor which is capable of measuring exactly two states, namely "flow present" and "no flow detected" is regarded as a binary sensor. Despite the simplicity of this sensor, which also has an advantageous effect on the costs, the advantages according to the invention can thus be achieved.
    According to another embodiment, the flow switch may be provided on the pressure side of the pump. This is advantageous because it is caused by the flow switch
    Flow resistance on the suction side can lead to cavitation depending on the respective pumping medium due to negative pressure.
    In an advantageous embodiment, the device may comprise a density sensor and / or a viscosity sensor for the medium being pumped. This embodiment is particularly advantageous for installations in which different pumping media, for example different fuels, have to be pumped with different density or viscosity.
    The device according to the invention permits a reliable calibration of the pump, without the pump delivery rate having to be specifically determined by an elaborate flow measurement. Advantageously, the device may be a fuel consumption measuring device for an engine test bench, wherein the pump may be a fuel pump, in particular a measuring circuit pump provided in a measuring circuit of the fuel consumption measuring device. In test stands, the fuel quantity supplied to the engine can be precisely controlled or checked at any time. This simplifies the construction, reduces the costs for the test stand and maintenance costs, and reduces the Feh¬lerhaftigkeit the system. Another advantage of the device according to the invention is its small size. This is particularly relevant in test benches, since the maximum dimensions of the measuring devices are often specified. The installation of a sophisticated sensor for the measuring circuit pump would therefore often not possible due to the reduced space available.
    Finally, the invention relates to the use of a previously described device according to the invention for determining a maintenance and / or replacement time for the pump. This allows according to the invention the determination of optimal maintenance strategies, whereby complex algorithms for calculating the failure risk and / or the expected costs of a failure can be included in the maintenance planning.
    The subject invention will be explained in more detail below with reference to Figures 1 to 3, which show by way of example, schematically and not restrictively advantageous Ausgestal¬tungen the invention. It shows
    1 shows a schematic representation of the essential elements of the device according to the invention;
    FIG. 2 shows a schematic representation of a device according to the invention for fuel consumption measurement for an engine test bench; FIG. and
    Fig. 3 is a diagram with different characteristics of a pump.
    1 shows a device according to the invention in a simplified schematic representation, wherein a pump 1 pumps a medium to be pumped in a pumping line 6 from a media source 7 to a media sink 8. In the context of the description given herein, the term "pumping line" refers to the line in which the pump is arranged and through which the pump pumps the medium to be pumped. The pumping line can also be circulated, as is usual in the case of liquor systems.
    The pump 1 is in communication with an actuator 2, wherein the actuator 2 defines a manipulated variable which determines the delivery rate of the pump 1. The manipulated variable may for example be a frequency, and the actuator 2 may be a frequency converter.
    Upstream of the pump, a density sensor 5 is provided in the pumping line 6, wherein instead of the density sensor 5 or in addition to this, a viscosity sensor can also be provided.
    Downstream of the pump, a flow switch 4 is provided. The flow switch 4 may be a conventional flow switch with a paddle disposed in the fuel line, the paddle being pushed sideways by the flow, thereby triggering a switch when the flow exceeds a certain threshold (this defines the previously-indicated flow switch switching point). It is also possible to use flow monitors based on a different principle, but the type shown represents a particularly simple and also cost-effective solution which has the advantage of very high switching point accuracy (ie the flow velocity or the flow rate at which the flow switch switches , hardly changes over the lifetime).
    A control unit 3 is connected to the actuator 2, the flow switch 4 and the density sensor 5. The control unit 3 receives from the density sensor 5 (and gege¬falls the viscosity sensor) for the density (or the viscosity) characterizing Sig¬nale. Furthermore, the control unit 3 receives from the flow monitor 4 signals indicative of the presence or absence of a flow in the pumping line 6. The control unit 3 can regulate the manipulated variable of the actuator 2. Via a user interface 11, the parameters of the control unit 3 can be set by a user. For example, parameters for the density and / or the viscosity of the medium to be pumped can also be entered via the user interface 11 if there is no density sensor 5 or no viscosity sensor in the system.
    The inventive method for operating a pump will now be explained in more detail with reference to FIG. 2. Fig. 2 is a graph plotting the flow Q in liters per hour (y-axis) versus the frequency f of the frequency converter of a pump in (x-axis).
    To determine a reference control variable fR, the frequency of the frequency converter is steadily (or substantially continuously) increased after the new pump has been installed, and the frequency fR at which the flow monitor detects a current is ascertained Point is referred to as switching point SPR. The flow associated with this switching point is referred to as QSp. The switching point SPR lies on the characteristic curve KLR of the new pump, wherein the characteristic curve KLR is mostly known from the data sheet of the pump or can be determined in advance. The delivery rate of the pump is determined by adjusting the frequency corresponding to the desired delivery rate, the relationship between the rate of adjustment and the rate of flow being defined by the characteristic KLR.
    On the basis of the known characteristic curve KLR, it would simply be easy to determine the exact value QS for the flow switch point flow rate, but precise knowledge of this value is not required for the further steps of the calibration. In the step of determining the reference frequency, which has been carried out in advance, only the value of the reference frequency fR is stored and subsequently used for the same combination of pump and flow monitor.
    Before each new use of the device, for example in an engine test bench before each new test run, the pump is calibrated using the stored value for the reference frequency fR. For calibrating the pump, as already in the determination of the reference frequency, ramped up by continuous (or at least substantially steady) increase the frequency of the frequency converter, and it is determined the KalibrierfrequenzfK, which is higher in the illustrated case, as the reference frequency fR. (The corresponding switching point is designated SPK in FIG. 2 and it corresponds to the same flow QSp as the reference switching point SPR).
    The frequency difference Af between the stored reference frequency fR and the calibration frequency fK (with Af = fR-fK) determined during the calibration now reveals that the actual characteristic KLK of the pump differs from the characteristic KLR of the new pump be used with the original settings, so is a dependent of the respective setting frequency deviation AQ for the Durchfluß at this frequency, which must be compensated by a calibration before each test run. In Fig. 2, the deviation AQK of the flow at the calibration frequency fK is given.
    In order to calibrate the actuator, ie the frequency converter of the pump, the current characteristic KLK must be "shifted" to the original characteristic KLRhin by an adaptation of the control frequencies. Since the characteristic curve does not differ qualitatively (in FIG. 2 both characteristic curves are shown as straight lines through the origin for the sake of simplicity), the measurement of the calibration frequency fK alone is sufficient to calibrate the characteristic curve in its slow course. In the example shown this can be easily understood by the relationship Qk / AQk = ίκ / Δί.
    The deviation of the respective calibrated characteristic curve KLK from the reference characteristic curve KLR can differ greatly from test run to test run since it is influenced by the respective pressure of the pumped fuel and the degree of wear of the pump, the value QSp of the flow switch changing only insignificantly for the switching point flow. In experiments it has been found in practice that even with very simple and cost-effective flow monitors a surprisingly accurate calibration of Pumpenbewerkstelligen can be.
    Although the switching point of a flow switch hardly changes over time, and is only insignificantly influenced by the pressure of the medium, it is to some extent highly dependent on the respective density and the viscosity of the fuel. In order to take this into account in the calibration, according to the invention, a density sensor and / or a viscosity sensor can be used in order to be able to take into account the change in the value Qsp for the switching point throughput during the calibration.
    The inventive method is applicable not only to pumps with linear characteristics, but can also be used for pumps whose characteristics have a different shape. For example, the characteristic may be convex or concave and / or have discontinuities. The implementation of the method of the invention for another characteristic is within the skill of one of ordinary skill in the art.
    Fig. 3 shows the essential elements of a fuel consumption measurement apparatus for an engine test bench. In a fuel line 6 'leading from a fuel tank 7' to a test specimen 8 '(or the test engine) are a pre-circulation pump 16, a flow sensor 12 (for example a Coriolis sensor), a density sensor 5, a measuring circuit pump 17 and a flow switch 4 is arranged. Due to the better response, the flow monitor 4 is arranged on the pressure side of the measuring-circuit pump 17.
    The device shown in FIG. 3 can be divided into two circles, a pre-circulation 9 between the fuel tank T and the flow sensor 12 provided in the fuel line 6 ', and a measuring circuit 10 between the flow sensor 12 and the test object 8.
    In Vorkreis 9 branches off between the Vorkreispumpe 16 and the flow sensor 12 from a tank return 14, which leads back into the fuel tank 7 'and in which a return pressure regulator 15 is provided. In the measuring circuit 10, starting from the test object 8 ', an engine return 13 is provided, which opens into the fuel line 6' between the flow sensor 12 and the density sensor 5.
    In the illustrated schematic sketch, the density sensor 5 is arranged directly in front of the measuring circuit pump 17 and the flow monitor 4. However, the density sensor 5 may be provided at any other location, such as in the area of the tank 7 or the engine 8. For simple embodiments, a density sensor may be dispensed with altogether, especially if no significant changes in the density of the fuel are anticipated, or if the density is high determined another way or can be entered via the user interface. In addition to or instead of the density sensor 5, a viscosity sensor may also be provided.
    The viscosity and density of the fuels commonly used is generally known or can be determined experimentally beforehand. If you know the type of fuel (eg diesel or gasoline) and for all fluids the switching point experimentally determined once, you can close on the density of the fluid and determine the exact switching point werden.Kennt only the fluid with the minimum density and with the maximum density, a very good estimate can be made of where the switching point will be due to the linear dependence of the dynamic viscosity on the density. It is to be expected that this estimation lies within the measuring accuracy, at least for the liquids customary in the automotive industry. The person skilled in the art is able to adapt the invention to the particular fuel properties and the required measuring accuracy.
    The pre-circulation pump 16 pumps the fuel from the fuel tank 7 'and establishes a supply pressure in the area between the pre-circulation pump 16 and the measuring circuit pump 17, which is limited by the return pressure regulator 15. If no fuel is consumed by the test specimen 8 'and therefore no fuel flows through the flow sensor 12, the fuel delivered by the prespump pump 16 is pumped back into the tank 7' via the tank return 14. In the measuring circuit 10, in turn, the fuel pumped by the measuring circuit pump 17 is supplied to the test object 8 'in a steady stream. Fuel that is not consumed by Prüf¬ling 8 'is returned via the engine return line 13 to the fuel line 6'.
    The advantage of these two circulation systems consisting of pre-circulation 9 and measuring circuit 10 is that the delivery rate of pre-circulation pump 16 and measuring circuit pump 17 can vary within a certain tolerance range, since the amount of fuel actually consumed by specimen 8 'is determined very accurately via the very accurate flow sensor 12 even though the amount supplied by the pilot pump 16 and the metering pump pump 17 is not exactly known. It is only necessary that the pre-circulation pump 16 and measuring circuit pump 17 can each provide the required pressure increases.
    Depending on the nature of the test specimens 8 ', it may be necessary for the measuring circuit pump 17 to also have to supply very high pressures, whereby defects generally occur in the measuring circuit pump 17 and not in the presupply pump 16 due to this load. Even if fluctuations in the flow rate of the pre-supply pump 16 or the measuring circuit pump 17 are unproblematic to some extent, too great a drop in the delivery quantity can lead to the test specimen 8 'not being able to obtain the required amount of fuel or the pressure of the test specimen 8 'provided fuel is too low. In this case, the results of a test run would be unusable.
    Tests carried out by the Applicant have shown that the pumping capacity of the measuring circuit pump 17 - depending on the pumped medium - can deviate from the actually set value (of, for example, 800 l / h) by 200 l / h already after one third of the setpoint life of the pump. This corresponds to a deviation of 25%. With the aid of the device according to the invention, this deviation can be limited to a value of less than 10% over the entire service life with very little effort. In addition, each calibration step allows a reliable assessment of the actual wear of the pump.
    The method according to the invention is carried out by the device according to FIG. 3 analogously to the procedure described above, wherein during the ramp-up of the delivery rate of the measuring-circuit pump 17 the fuel in the measuring circuit 10 is pumped in a cycle.
    In order to determine the pumping power of the measuring-circuit pump 17 exactly, it would also be possible to install a second flow sensor in the region of the measuring circuit, for example behind the measuring-circuit pump 17, but the Coriolis sensors generally used for this purpose are very expensive and have the disadvantage that they reduce the pressure of the fuel supplied to the test specimen 8 '. In practice, a second flow meter is therefore not a sensible option.
    In order to be able to advantageously use the method according to the invention also for the pre-circulation pump 16, the pre-circulation 9 in the illustrated embodiment has its own flow control device 4 ', whereby the pre-circulation 9 can be separated from the measuring circuit 10 by means of a shut-off valve 18, so that the entire fuel is in pre-circulation 9 about the return
    Pressure regulator 15 and the tank pressure circuit 14 is pumped back into the tank in a circuit. The calibration can then be carried out analogously to the method described above for the pre-circulation pump 9 (the control units, ie in particular an actuator and a control unit, via which the pre-circulation pump is controlled, are not shown for the sake of clarity, it is known to a person skilled in the art, however such a solution is to be implemented in practice).
    As pumps can be used in connection with the subject invention any Pum¬pen whose pumping power can be controlled sufficiently accurately with the actuator used for the particular application. Examples of such pumps include gear pumps, rotary vane pumps, rotary lobe pumps, rotary piston pumps, or the like. In principle, the method according to the invention can advantageously be applied to any pump in which the delivery rate can be set variably. It is vorteil¬haft if the pump has a linear flow rate-speed characteristic curve. However, this is not a mandatory requirement.
    The invention is not only suitable for use in connection with fuel measurements of engine test stands, but can also be used for other types of pumps. For example, the invention could also be used to monitor and Nachstel¬lung the flow rate of pumps in heating circuits advantageous.
    Bezuaszeichen:
    Pump 1
    Actuator 2 - frequency converter 2 '
    Control unit 3flow monitor 4, 4 '
    Density sensor 5
    Pumping line 6 - fuel line 6 '
    Media Source 7 - Fuel Tank 7 '
    Media sink 8 - DUT 8 '
    Preliminary circle 9 Measuring circuit 10User interface 11Flow sensor 12Engine return 13Tank return 14Regular pressure regulator 15Precision pump 16Sensing pump 17Screw valve 18
    权利要求:
    Claims (11)
    [1]
    A method of operating a pump, in particular a measuring circuit pump for fuel consumption measurement in an engine test bench, wherein a flow switch is provided with a certain switching point (SP) in the pumping line, and wherein the method is characterized by the following steps: - once in advance with the new pump Determining a reference manipulated variable (fR) for an actuator of the pump by o starting the pump by substantially continuously changing the manipulated variable of the actuator to the switching point (SP); and o determining a manipulated variable associated with the switching point (SP) and storing this manipulated variable as the reference manipulated variable (fR); - before pumping, perform a calibration step on the same pump by: o starting the pump by substantially continuously changing the actuating variable of the actuator to the switching point (SP); determining a manipulated variable assigned to the switching point (SP) and defining this manipulated variable as a calibration manipulated variable (fK); o determining a manipulated variable difference value (Af) between the reference manipulated variable (fR) stored for the pump and the flow monitor and the calibration manipulated variable (fK); and o calibrating the actuator of the pump on the basis of Stellgrößenendifferenzwer¬tes (Af).
    [2]
    Method according to claim 1, characterized in that the density and / or the viscosity of the pumped medium is determined by means of a density and / or viscosity sensor, and that the difference between the density and / or viscosity of the medium in the determination of the reference control variable and the density and / or viscosity of the medium is taken into account in the calibration step in the calibration of the actuator.
    [3]
    3. The method according to any one of claims 1 or 2, characterized in that the calibrating step based on the manipulated variable difference value (Af) is determined for the wear of the pump characteristic wear value.
    [4]
    4. The method according to claim 3, characterized in that on the basis of Verschlei߬wertes a replacement time for the pump is determined.
    [5]
    Apparatus for calibrating a pump (1) provided in a pumping line (6), the device comprising an actuator (2) for adjusting the pumping capacity of the pump (1) and a control unit (3), characterized in that the device is in the fuel line (6) has a flow monitor (4), wherein the control unit (3) is designed to - the manipulated variable of the actuator (2) when starting the pump (1) to the switching point (SP) of the flow monitor (4) substantially steadily change and to determine and store a manipulated variable assigned to the respective switching point (SP); to determine a manipulated variable difference value (λf) between a reference manipulated variable (fR) stored for the pump (1) and the flow monitor (4) and a calibration manipulated variable (fK) determined during the calibration; and - to calibrate the manipulated variable of the actuator (2) of the pump (1) on the basis of the manipulated variable difference value (Af).
    [6]
    6. Apparatus according to claim 5, characterized in that the flow monitor (4) in the pump (1) is integrated.
    [7]
    7. Apparatus according to claim 5 or 6, characterized in that the flow monitor (4) is a binary sensor.
    [8]
    Device according to any one of Claims 5 to 7, characterized in that the flow monitor (4) is provided on the pressure side of the pump (1).
    [9]
    9. Device according to one of claims 5 to 8, characterized in that the device comprises a density sensor (5) and / or a viscosity sensor for the pumped medium.
    [10]
    10. Device according to one of claims 5 to 9, characterized in that the device is a fuel consumption measuring device for an engine test stand, wherein the pump (1) comprises a fuel pump, in particular a measuring circuit provided in a measuring circuit of the Kraftstoffver¬brauchs measuring device measuring pump ( 17).
    [11]
    11. Use of a device according to one of claims 5 to 10 for determining a maintenance and / or replacement time for a pump.
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    公开号 | 公开日
    EP3215742A1|2017-09-13|
    CN107002662A|2017-08-01|
    JP2017535793A|2017-11-30|
    CN107002662B|2019-02-19|
    EP3215742B1|2019-01-02|
    US20170335841A1|2017-11-23|
    AT514517B1|2016-06-15|
    WO2016071427A1|2016-05-12|
    AT514517A3|2016-04-15|
    JP6626114B2|2019-12-25|
    KR20170082552A|2017-07-14|
    US10400762B2|2019-09-03|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50807/2014A|AT514517B1|2014-11-05|2014-11-05|Method and device for operating a pump|ATA50807/2014A| AT514517B1|2014-11-05|2014-11-05|Method and device for operating a pump|
    JP2017542326A| JP6626114B2|2014-11-05|2015-11-05|Method and apparatus for operating a pump|
    KR1020177014537A| KR20170082552A|2014-11-05|2015-11-05|Method and device for operating a pump|
    EP15790142.2A| EP3215742B1|2014-11-05|2015-11-05|Method and device for operating a pump|
    PCT/EP2015/075767| WO2016071427A1|2014-11-05|2015-11-05|Method and device for operating a pump|
    CN201580060325.1A| CN107002662B|2014-11-05|2015-11-05|Method and apparatus for running pump|
    US15/524,477| US10400762B2|2014-11-05|2015-11-05|Method and device for operating a pump|
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