• 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 method for controlling or controlling the thermal conditions on a test stand (4) for at least one heat or cold emitting test object (UUT), and / or for controlling or controlling the thermal conditions of the test object (UUT), in particular at least one For example, designed as an internal combustion engine heat engine and / or at least one electric machine, wherein for maintaining a predetermined set temperature (Ts) or a predetermined course of a set temperature (Ts) a heat transfer medium between the test object (UUT) and a heat sink (8a) or heat source (8b) a conditioning device (5) is performed. In order to realize the most dynamic possible control or regulation of the thermal ambient conditions on the test stand (4) and / or on the test object (UUT), it is provided that the heat development (Q) and / or temperature of the test object (UUT) is determined by means of at least one first simulation model (FIG. 9) is determined momentarily and / or predictively and the heat sink (8a) or a heat source (8b) is regulated or controlled as a function of the instantaneous and / or predictive heat development (Q) of the test object (UUT).
    公开号:AT519170A2
    申请号:T50403/2017
    申请日:2017-05-12
    公开日:2018-04-15
    发明作者:
    申请人:Ivd Prof Hohenberg Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a method for controlling or controlling the thermal conditions on a test stand for at least one heat or cold emitting test object, in particular at least one example designed as an internal combustion engine heat engine and / or at least one electric machine, wherein to maintain a predetermined target temperature or a predetermined Course of the target temperature, a heat transfer medium between the test object and a heat sink or heat source is performed. Furthermore, the invention relates to a conditioning device for carrying out the method.
    In test cells with test benches, for example vehicle test stands, measured variables of interest under defined test conditions, such as the emission output of a vehicle, are measured under real operating conditions, in particular driving conditions (RDE = Real Driving Emissions). For the measurement, a relatively narrow tolerance window for the temperature within the test cell and / or the test object (UUT = Unit Under Test) must usually be maintained. Usually, the interior of the test cell is cooled by an existing air conditioning device as soon as the temperature within the test cell exceeds a defined limit. The disadvantage is that the cooling of the air takes place with a certain time delay. Especially for fast-changing processes occurring in the real ferry mode, this type of temperature control is too slow and too slow. Usually, the heat exchange required for the cooling of the air takes place via a heat exchanger forming a caloric heat sink, wherein the heat is transferred via the heat passage through a heat exchanger wall. However, this approach is relatively slow because of the thermal inertia of the heat transfer of the heat exchanger wall, which also adversely affects the dynamics of the control or regulation.
    It is the object of the invention to avoid the disadvantages mentioned and to enable in the simplest possible way a dynamic control or regulation of the thermal conditions on a test stand for a test object or the test object.
    According to the invention, this takes place in that the heat development and / or temperature of the test object is determined momentarily and / or predictively by means of a virtual heat sensor and the heat sink or a heat source is regulated or controlled as a function of the instantaneous and / or predictive heat development of the test object.
    The test object can be, for example, a heat engine-in particular an internal combustion engine of a motor vehicle-or an electric machine, or a combination of heat engines and electrical machines of a hybrid drive system.
    Virtual sensors are not physically existent, but are realized in software. They "measure" (calculate) values derived from the measurements of real sensors using an empirically learned and / or physical model.
    The instantaneous and / or predictive determination of the heat development of the test object preferably takes place on the basis of at least one input variable by means of a heat model of the test object. Calculated heat models are used, for example, in DE 10 2004 033 394 B3 to determine the temperature of components to be protected in the exhaust gas line. The thermal model used for the method according to the invention is preferably based on simple physical laws, for example on the energy balance of the test object, and is adjusted empirically by input variables to the respective application. The heat model thus forms a real-time semi-empirical simulation model. From this, depending on the operating point, the necessary data for a predictive control can be determined, wherein the control parameters can be constantly optimized.
    In a particularly advantageous embodiment of the invention, it is provided that at least one operating measurement value of the test object from the group of power, rotational speed, energy supply and / or coolant temperature is supplied to the heat model. From these operating measurements, which are normally known in heat engines, a prognosis for the course of the heat output is determined by means of the heat model, thermal inertia, dead times and transit times being taken into account in the system.
    In contrast to the known from the prior art sluggish and delay time-prone direct temperature control over the measured temperatures, the respective heat development of the test object in real time or even before the actual occurrence is detected in the process according to the invention, whereby very early and preventive measures can be initiated to to prevent an excessive increase of the ambient temperature in time. This is done by the fact that in the regular operation of the test object usually detected variables such as power, speed, power, object temperature or the like a suitable thermal computing model (heat model) are supplied and so further optimized in a self-learning process for each application in terms of accuracy can be. By means of the heat model based virtual thermal sensor, the current heat development is determined, the software solution must be constructed so that a real-time capability exists. This virtual sensor of heat development is thus based on a semi-empirically constructed heat model of the test object and the parameters continuously recorded in test bench operation. Other special sensors can be omitted.
    It is particularly advantageous if, in addition to the heat model, information about the time profile of the test cycle-for example a defined driving cycle of a vehicle-is supplied. This makes it possible to include also scheduled changes in the load and the rotational speed of the test object in the prognosis for the time course of the heat output of the test object.
    In a continuation of the invention, a model-based diagnosis of the function of the conditioning device can be carried out on the basis of the heat model. As a result of this diagnosis, information, recommendations and / or warnings in case of errors in operation can be transmitted to the operator and / or the manufacturer of the conditioning device. This allows the operator or the manufacturer of the conditioning device, if necessary, to perform a suitable maintenance of this.
    For example, depending on the heat requirement and temperature level of the existing air conditioning device of the test cell and the temperature level of the test object, control or control parameters of the conditioning device can be adapted and optimized online. The specific dead time in the system can be used as a default for a predictive control or regulation. In addition to or instead of optimization via remote access, a self-optimization algorithm can be integrated in the control device of the conditioning device.
    The data from the first simulation model can be used as additional variables for the control of the conditioning device.
    In a continuation of the invention, it can further be provided that conditioning means-in particular the heat source and / or heat sink of the conditioning device or the conditioning circuit of the heat source and / or heat sink-are imaged in a preferably semi-empirical second simulation model, wherein dead times are preferably based on the second simulation model the conditioning device and / or control parameters of the conditioning device for performing a predictive control / regulation are determined. This makes it possible to also predictively optimize the heat sink or heat source, wherein advantageously the simulations of the test object and the conditioning devices are combined with each other. Predictive optimization affects both control and actuators.
    To carry out the method, a conditioning device for controlling or controlling the thermal conditions is provided with a control unit and a heat sink controlled by the latter, to which the heat of the test object can be fed to maintain a predetermined setpoint temperature. The control unit has a virtual heat sensor forming, preferably semi-empirical, heat model of the test object, which determines the heat development and / or temperature of the test object momentarily and / or predictively and depending on the predicted heat development of the test object, the heat sink or a heat source controls or controls. The control unit is - wired or wireless - connected to an interface of the test object to receive at least one operating measurement of the test object from the group power, speed, power and / or coolant temperature. Furthermore, the control unit can advantageously have a data memory or be connected to a data memory-wireless or wired-in which information about the time profile of the test cycle is stored.
    In a particularly advantageous embodiment of the invention it is provided that the heat sink is designed as a physical heat sink and has a defined volume for a heat transfer medium by the heat transfer medium between the test object and the heat sink is directly interchangeable. Similarly, the heat source may be formed as a physical heat source and have a defined volume for a heat transfer medium by the heat transfer medium between the test object and the heat source is directly interchangeable. In this case, a particularly rapid thermal conditioning can be achieved if the removal of the hot heat transfer medium - fluid or air - from the cooling circuit as close as possible to the test object. The volume is to be designed so that the flow of the heat transfer medium in the cooling circuit is disturbed as little as possible.
    The heat sink and the heat source can be formed by different means and, for example, have different cooling circuits. A particularly compact and partly economical and easy-to-control embodiment of the invention provides that heat sink and heat source are formed by the same device, that is, for example, by the same cooling circuit.
    A physical heat sink is understood here to mean a heat sink in which a heat transfer medium is exchanged directly between the test object and the heat sink with different temperature levels. Analogously, a physical heat source here means a heat source in which a heat transfer medium is exchanged directly between the heat source and the test object with different temperature levels. In contrast, the heat exchange between a test object and a caloric heat sink or caloric heat source usually takes place via a heat exchanger, wherein the heat is transferred via the heat passage through at least one heat exchanger wall.
    The physical heat sink or physical heat source can be formed for example by a defined volume for heat transfer medium having switchable container in which the heat transfer medium preconditioned and if necessary, a standard cooling circuit is supplied.
    A preferred embodiment of the invention provides that the defined cooling volume is formed by a cooling circuit which has a first delivery device, preferably speed-controllable, and which is flow-connected or flow-connected to the test object via supply and discharge flow paths. Optionally, a first heat exchanger may be arranged downstream or upstream of the first conveyor. This first heat exchanger can be, for example, a standard heat exchanger of an existing air conditioning system of the test cell.
    An embodiment of the invention provides that the cooling circuit has a bypass valve, with which the flow connection of the cooling circuit regulated to the test object can be produced and / or interrupted.
    A particularly advantageous embodiment of the invention provides that the cooling circuit has a primary circuit with the first conveyor and a secondary circuit with a second conveyor, wherein the secondary circuit branches off in the arranged downstream of the first conveyor first node from the primary circuit and in a downstream of the first node of the Primary circuit arranged second node opens into the primary circuit, wherein preferably the second conveyor is speed controlled. Preferably, the cooling circuit between the first node and the second node of the primary circuit on the one hand and the secondary circuit on the other hand is designed valveless. For cooling the heat transfer medium in the secondary circuit, it is advantageous if a second heat exchanger is arranged downstream or upstream of the second conveyor. The physical heat sink / heat source is formed here mainly by the secondary circuit of the cooling circuit of the heat transfer medium, the secondary circuit is activated or deactivated only by switching on the second conveyor. When activating the second conveyor, the heat transfer medium of the secondary circuit is very quickly integrated into the cooling circuit, wherein the branched in the first node of the primary circuit and funded by the second conveyor heat transfer medium flows through the second heat exchanger is preconditioned and finally in the second node in the primary circuit the cooling circuit is fed. Due to the preconditioning of the heat medium in the secondary circuit, the heat exchange takes place very rapidly due to the physical exchange of the cooling medium. A further acceleration of the heat exchange can be achieved if the first and / or second conveyor device is / are designed as a displacement machine (s), preferably as a gear pump. Displacement machines have a faster response compared to turbomachines, whereby crucial dead time can be saved when activating the respective conveyor.
    By using a physical heat sink or heat source, the temperature control dynamics can be significantly increased; this is only approximately dependent on the rate of change of the heat transfer medium flow m. The influence of the thermal inertia of the system is greatly reduced. An optionally undesirable influence on the flow in the primary circuit of the heat transfer medium flow can be avoided by appropriate design layout and the arrangement of the supply and discharge of the heat transfer medium flow in fluidically suitable zones. The flow resistance of the cooling circuit can be adapted to the real engine circuit by means of adapted flow guidance.
    The invention will be explained in more detail below with reference to the non-limiting exemplary embodiments shown in the figures.
    In it show schematically
    1 shows a test stand for motor vehicles with a device according to the invention for controlling or controlling the thermal ambient conditions on a test stand,
    2 shows a characteristic diagram of a standard heat exchanger for a test object,
    3 shows the time delay in a known conditioning device,
    4 simulation models and control of the conditioning device in an embodiment according to the invention,
    5 shows the second simulation model of this conditioning device,
    6 shows a functional distribution of the first and second simulation models of a conditioning device according to the invention in an embodiment variant,
    7 shows the principle of a physical heat sink or physical heat source, and
    Fig. 8 to 11 inventive conditioning in different embodiments.
    1 shows a test stand 1 for a test object UUT (Unit Under Test), the test stand 1 being designed as a chassis dynamometer for a motor vehicle 2 in the example shown. The test object UUT is formed in the embodiment by the internal combustion engine 3 of the motor vehicle 2, wherein the heat-emitting internal combustion engine 3 is operated according to a defined test cycle. The test object UUT can also be formed by another heat engine and / or by one or more electrical machines, by the entire motor vehicle 2, or even by a cold emitting machine.
    The test stand 1 is arranged in a test cell 4 in which, during the performance of the test, a setpoint temperature Ts defined in a relatively narrow permissible temperature window is to be held by a conditioning device 5 for controlling and controlling the thermal ambient conditions. The conditioning device 5 for regulation and control comprises a control unit 7 and a conventional or even physical heat sink 8a and / or a heat source 8b, which is controlled or controlled by the control unit 7. The heat source 8b is used, for example, to quickly bring the test object UUT to operating temperature.
    In Fig. 1, two cases for controlling or controlling the thermal conditions with a conditioning device according to the invention 5 are shown schematically, which can be carried out separately or in combination with each other.
    In the first case, fluid flows in a direction indicated by dashed lines cooling circuit 12 corresponding to the arrows F to one example by the
    Internal combustion engine 3 formed test object UUT and absorbs heat of the test object UUT. The heated fluid F is fed to the heat sink 8a (or heat source 8b if the fluid temperature is too low) of the conditioning device 5 and conditioned to the desired temperature.
    In the second case shown by dashed lines in FIG. 1, air flows according to the arrows L at an ambient temperature of, for example, 20 ° to the test object UUT formed by the motor vehicle 2 together with the internal combustion engine 3 and absorbs heat of the test object UUT. The heated air L is collected in an exhaust duct 80 and via a near the exit of the exhaust duct 80 arranged suction fan 81 at a temperature of for example 60 ° C, the heat sink 8a (or heat source 8b at too low ambient temperature and / or exhaust air temperature) of the conditioning. 5 supplied and conditioned to the desired temperature. Thereafter, the cooling air is again supplied to the interior of the test cell 4 and the environment of the test object UUT.
    The removal of the hot or cold heat transfer medium - fluid and / or air - thus takes place as close as possible to the test object UUT, whereby a particularly rapid thermal conditioning can be achieved.
    The control unit 7 has for imaging the test object UUT on a first simulation model 9, which is formed by a semi-empirical thermal model of the test object UUT. The first simulation model 9 can be used as a virtual sensor in order to use additional variables which are not directly sensory. With the semi-empirical thermal model, the heat development Q is determined momentarily and / or predictively. On the basis of the predicted heat development Q, the heat sink 8a or the heat source 8b is regulated or controlled accordingly to adhere to the defined setpoint temperature Ts or the time profile of the setpoint temperature Ts of the test object UUT and / or the ambient temperature of the test object UUT. The control unit 7 is wirelessly or wired connected to the test bench control or an interface 10 of the test object UUT to receive at least one operating measurement value of the test object UUT from the group power, speed, power and / or object temperatures of the test object UUT. Furthermore, in the exemplary embodiment shown, the control unit 7 is connected to a data memory 11 in which information about the time profile of the current test cycle for the test object UUT is stored.
    The conditioning device 5 has the task to bring a liquid or gaseous heat transfer medium - ie fluid or air - to a desired temperature or to hold, this heat transfer medium from the test object UUT very different (0-100%) heat Q is added or removed ,
    On the one hand, especially in the transient operation of a test object UUT formed for example by an internal combustion engine 3, the amount of heat Q to be supplied or discharged is very variable. On the other hand, the temperature level T or the heat output PWT and the mass flow mlr m2 of the heat transfer medium between the test object UUT and the heat sink 8a or heat source 8b are very different, as indicated schematically in FIG. This causes high demands in terms of control / regulation, the optimal control parameters vary accordingly. In addition, the desired temperatures of the heat transfer medium in the cooling circuit of the conditioning 5 set by the thermal inertia of the components of the conditioning 5 and by the duration of the heat transfer medium in the cooling circuit of the conditioning 5 only delayed, as shown schematically in Fig. 3. On a power demand Puut and thus sudden heat release test object UUT conventional conditioning 5 react conceptually with a relatively large time delay in heat dissipation, on the one hand by the duration of the heat transfer medium (indicated by the temperature profile TomWT of the heat transfer medium) and on the other hand by the thermal inertia of Components of the conditioning device 5 (indicated by the course of the temperature Tke of components such as lines, pumps, valves, heat exchangers, etc. of the conditioning device 5).
    According to the invention, the conditioning device 5 is imaged virtually parallel to the real operation in a second simulation model 90 and with regard to the transit times, as shown schematically in FIG. 4. The second simulation model 90 may be a physical or semi-empirical model of the conditioning unit 5 or the entire refrigeration cycle 12. The control unit 7 of the conditioning unit 5 continuously receives data of the test object UUT, that is to say instantaneous measurement data, as well as information about impending changes in the mode of operation of the test object UUT. The second simulation model 90, like the first simulation model 9, can be implemented in the control unit 7. Tasks of the second simulation model 90 are: (1) Carrying out a model-based diagnosis of the functions of the conditioning device 5 in order to be able to provide information, recommendations and / or warnings in the event of a fault during operation to the operator and manufacturer of the conditioning device 5 at an early stage. In parallel, conventional on-board diagnostics OBD can be carried out on the basis of a target / actual comparison of measurement data and component functions, the data D from the second simulation model 90 and the results of the on-board diagnostics OBD being coordinated or mutually supplemented can. (2) Online adaptation / optimization of the controller / control parameters RS depending on the heat requirement and the temperature levels of the test stand's own air conditioning unit 6 and the test object UUT. (3) Determining the dead times in the system of the conditioning device 5 as a default for a predictive control / regulation. (4) Performing integrated self-optimization of the conditioning device 5.
    In this case, the second simulation model 90 is used as a so-called virtual sensor by using data from the second simulation model 90 as additional variables.
    The data and information exchange is indicated by arrows D.
    From this, the following functions can be derived: 1.) Monitoring of the sensors and actuators by on-board diagnostics OBD: through this conventional diagnostics by comparison of measured value and component parameters, the functions of sensors and actuators can be compared with the simulation and errors be discovered early. 2.) Operators and / or manufacturers of the conditioning device 5 are informed constantly and in real time about the condition of the conditioning device 5:
    Thus, appropriate measures for the maintenance of the conditioning device 5 can be taken early on. 3.) Detecting the thermal inertia and the transit times in the system of
    Conditioning means 5 by means of the semi-empirical second simulation model 90 in real time; From this, depending on the operating point, the necessary parameters for a predictive control can be determined. 4.) Continuous optimization of the control parameters: through the simulation, the control parameters can be continually adapted and optimized in real time, which ensures rapid readjustment to changing conditions.
    FIG. 5 schematically shows the second simulation model 90 of the conditioning device 5. It consists of software 91, which is based on a physical or semi-empirical mathematical model, and hardware 92. In software 91, the heat removal or supply requirements are formulated as Qsou, resulting in the use of a heat sink or heat source of the conditioning device 5 , This setpoint value Qsou is compared with the determined actual value Qist.
    FIG. 6 schematically shows the interaction of the semi-empirical first simulation model 9 of the test object UUT and the second simulation model 90 of the conditioning device 5. By means of the first simulation model 9, a first prediction of the expected primary heat quantities rhi on the basis of the current operating parameters and on the basis of the made known test cycle. Furthermore, by means of the second simulation model 90, a second prediction is made about the delays to be expected in the heat removal, taking into account the thermal inertias and propagation times in the secondary-side system, that is to say the conditioning device 5. As a result of the first and second prediction, the optimum time for activating the conditioning device 5 and / or the parameters for controlling the conditioning device 5 are determined.
    In Fig. 7, the principle of one indicated by reference numeral 8 physical heat sink or physical heat source is shown: In a physical heat sink or heat source 8, the required heat exchange does not take place as in conventional caloric heat sinks relatively slowly on the heat transfer through a heat exchanger wall, but by direct Exchange of a heat transfer medium according to the equation: Q = mc (Γα - T2)
    Here, Q is the heat flow, m is the heat transfer medium flow, c is the specific heat capacity of the heat transfer medium, Ti is the temperature of the test object UUT, and T2 is the temperature of the physical heat sink or heat source 8.
    This allows a heat transfer through a heat exchanger wall independent and thus much faster heat exchange, creating a sufficiently high dynamics can be achieved.
    As shown in Fig. 8, the heat sink 8a or heat source 8b - which are formed as a physical heat sink or physical heat source 8, a conveyor 13, for example a speed-controlled pump, have over which the heat transfer medium is conveyed, wherein an exchange of the Mass flows m of the heat transfer medium of the temperature levels Ti and T2 takes place.
    Occasionally, a separation of the cooling media of the test object and the test bench's own air conditioning device 6 may be desired. To achieve this, a caloric heat exchanger 15 may be provided between the conditioning device 5 and the test stand's own air conditioning device 6, as shown schematically in FIG. 9.
    10 schematically shows an embodiment of a - also physical - heat sink 8a or heat source 8b, in which the media exchange of the heat transfer medium in a separate cooling circuit 12 via its own conveyor 13, for example, a variable speed pump takes place. For example, via the bypass valve 14, the flow through a bypass flow path 12 a can be regulated, whereby the heat extracted or supplied to the test object UUT can be varied. The conveyor 13 may be formed for example as a turbomachine. A particularly rapid heat exchange and rapid response can be achieved if the conveyor 13 is designed as a displacement machine, for example as a gear pump. Reference numeral 15 designates a cooling device formed, for example, by a conventional caloric heat exchanger, with which - as already illustrated in FIG. 9 - a separation of the heat transfer media of the conditioning device 5 and the test stand's own air conditioning device 6 takes place. As an alternative to a variable-speed pump, a pump with constant speed can also be used for the conveyor 13. In this case, it is advantageous for volume control of the heat transfer medium in the cooling circuit 12 to provide a bypass flow path 12a, whose flow can be controlled or regulated via a bypass valve 14, as indicated by dashed lines in Fig. 10. By way of the bypass valve 14, the flow in the bypass flow path 12a can be regulated, whereby the heat extracted or supplied to the test object UUT can be varied. By way of the bypass valve 14, the cooling circuit 12 can be connected to or disconnected from that of the test object UUT, with the flow connections of the cooling circuit 12 to the test object UUT taking place via at least one inflow path 16 and at least one outflow path 17.
    FIG. 11 shows a further embodiment of the invention wherein the cooling circuit 12 has a primary circuit 121 and a secondary circuit 122. The secondary circuit 122 branches off from the primary circuit 121 in a first node point Kl and flows into the primary circuit 121 in a second node K2 again. The primary circuit 121 has a first conveyor 131 and the secondary circuit 122 has a second conveyor 132. Reference numeral 151 denotes an optional first heat exchanger arranged in the primary circuit 121, which is arranged downstream of the first conveyor 131. However, the first conveyor 131 may also be provided downstream of the second node K2. This heat exchanger can be formed, for example, by a conventional system cooler of the test stand's own air-conditioning device 6. In the secondary circuit 122, a second conveyor 132 and a second heat exchanger 152 is arranged, which is cooled by a further cooling medium with the temperature T2 and the second mass flow m2. The second heat exchanger 152 may be located downstream or upstream of the second conveyor. The primary circuit 121 with the first heat exchanger 151 forming a caloric heat sink operates in a conventional manner by heat transfer to the heat exchanger walls of the first heat exchanger 151. In stationary operation, only the first conveyor 131 is turned on and delivers the first mass flow mlr the second conveyor 132 is deactivated, so that no mass flow occurs in the secondary circuit 122. In case of increased
    Konditionierungsbedarfes the secondary circuit 122 is switched by activating the second conveyor 132 thereto, whereby a third mass flow m3 is promoted. With appropriate dimensioning of the second conveyor 132, a large part of the first mass flow is conveyed into the secondary circuit-only a small part mla will flow through the line part 121a of the primary circuit 121 between the nodes K1 and K2. Thus, the heat transfer medium already preconditioned in the secondary circuit 122 by the second heat exchanger 152 is introduced into the primary circuit 121. Thus, there is a direct exchange of the heat transfer medium between the test object UUT and the heat sink 8a or heat source 8b, which are thus formed in the sense described as a physical heat sink or physical heat source 8. The cooling circuit 12 is preferably carried out completely without any switching valves, whereby response times of these switching valves omitted. The connection or disconnection of the secondary circuit 122 thus takes place only by activating or deactivating the second conveyor 132. This allows rapid heat exchange.
    In order to allow a particularly rapid heat exchange, it is particularly advantageous if at least the second conveyor 132 is designed as a displacement machine, for example as a gear pump.
    According to the method according to the invention, the actual heat development Q and / or future heat development Q of the test object UUT is determined with the first simulation model 9 in real time, with the second simulation model 90 the optimal control / control parameters and the optimal time of the intervention taking into account the secondary dead times or Determines transit times and thus the heat sink 8a or heat source 8b regulated or controlled. With the first simulation model 9 and the second simulation model 90 of the test object UUT, it is thus possible to be able to react to this at the beginning of a change in the heat development Q. Such a predictive temperature control is better to design, more efficient or more accurate than previous solutions. In particular, not only this itself, but also the air conditioning of the test cell 4 can be actuated much earlier via the information of the current heat output of the test object UUT.
    权利要求:
    Claims (20)
    [1]
    1. A method for controlling or controlling the thermal conditions on a test stand (4) for at least one heat or cold emitting test object (UUT), and / or for controlling or controlling the thermal conditions of the test object (UUT), in particular at least one example Internal combustion engine trained heat engine and / or at least one electric machine, wherein for maintaining a predetermined desired temperature (Ts) or a predetermined time course of the set temperature (Ts) a heat transfer medium between the test object (UUT) and a heat sink (8a) or heat source (8b) Conditioning device (5) is guided, characterized in that the heat generation (Q) and / or temperature of the test object (UUT) by means of at least one first simulation model (9) is determined momentarily and / or predictively and in dependence on the current and / or predictive heat development (Q) of the test object (UUT) (6) the heat sink (8a) or a heat source (8b) is controlled or controlled.
    [2]
    2. The method according to claim 1, characterized in that the first simulation model (9) has a - preferably semi-empirical - heat model of the test object (UUT), wherein the instantaneous and / or predictive determination of the heat generation (Q) of the test object (UUT) on the Based at least one input variable by means of the heat model.
    [3]
    3. The method of claim 1 or 2, characterized in that the first simulation model (9) as input variables at least one operating measurement value of the test object (UUT) from the group power, speed, power and / or object temperature is supplied.
    [4]
    4. The method according to any one of claims 1 to 3, wherein the test object (3) is operated according to a time-varying test cycle, characterized in that the first simulation model (9) as an input quantity information about the timing of the test cycle are supplied.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that for controlling or controlling the thermal conditions, a heat transfer medium directly between the test object (UUT) and a defined cooling volume of the heat sink (8a) or the heat source (8b) is replaced.
    [6]
    6. The method according to any one of claims 1 to 5, characterized in that the conditioning device (5) is imaged in a preferably semi-empirical second simulation model (90).
    [7]
    7. The method according to claim 6, characterized in that on the basis of the second simulation model (90) dead times of the conditioning device (5) and / or control parameters of the conditioning (5) for performing a predictive control / regulation are determined.
    [8]
    8. Conditioning device (5) for carrying out the method for controlling or controlling the thermal conditions on a test stand (4) for at least one heat or cold emitting test object (UUT), and / or for controlling or controlling the thermal conditions of the test object (UUT ), in particular at least one heat engine designed, for example, as an internal combustion engine (3) and / or at least one electrical machine, the conditioning device (5) having a control unit (7) and a heat sink (8a) and / or heat source (8b) controlled by the latter wherein a heat transfer medium between the test object (UUT) and the heat sink (8a) or between the heat source (8b) and the test object (UUT) can be performed according to a predetermined setpoint temperature (Ts) or a predetermined curve of the setpoint temperature (Ts) of claims 1 to 7, characterized in that the control unit (7) at least a first simulation model (9) having a, preferably semi-empirical, thermal model of the test object (UUT) which determines the heat development (Q) and / or temperature (Ti) of the test object (UUT) momentarily and / or predictively and in dependence on the instantaneous and / or predictive heat development (Q ) of the test object (UUT) regulates or controls the heat sink (8a) or a heat source (8b).
    [9]
    9. conditioning device (5) according to claim 8, characterized in that the control unit (7) with a test bed control or an interface of the test object (UUT) is connected to at least one operating measurement of the test object (UUT) from the group power, speed, power , and / or to receive test object temperature.
    [10]
    10. conditioning device (5) according to claim 8 or 9, wherein the test object (UUT) is operable after a time-varying test cycle, characterized in that the control unit (7) has a data memory or is connected to a data memory (11), in which information about the time course of the test cycle are stored.
    [11]
    11. conditioning device (5) according to any one of claims 8 to 10, characterized in that the heat sink (8a) is formed as a physical heat sink and has a defined volume for a heat transfer medium, wherein the heat transfer medium between the test object (UUT) and the heat sink ( 8a) is directly interchangeable.
    [12]
    12. conditioning device (5) according to any one of claims 8 to 11, characterized in that the heat source (8b) is formed as a physical heat source and has a defined volume for a heat transfer medium, wherein the heat transfer medium between the test object (UUT) and the heat source ( 8b) is directly interchangeable.
    [13]
    13. conditioning device (5) according to claim 11 or 12, characterized in that the defined volume is formed by a at least one - preferably speed-controllable - conveying device (13; 131, 132) having cooling circuit (12) which via supply and Abfuhrströmungswege ( 16, 17) is flow-connected or flow-connectable to the test object (UUT) (UUT).
    [14]
    14. conditioning device (5) according to claim 13, characterized in that downstream of at least one conveyor (13; 131, 132) at least one heat exchanger (15; 151, 152) is arranged, preferably downstream of a first conveyor (131), a first heat exchanger (151) is arranged.
    [15]
    15. conditioning device (5) according to claim 13 or 14, characterized in that the cooling circuit (12) has a preferably via a bypass valve (14) adjustable bypass flow path (12a), with which the flow connection to the test object (UUT) is variable.
    [16]
    16. conditioning device (5) according to one of claim 13 to 15, characterized in that the cooling circuit (12), a primary circuit (121) having a first conveyor (131) and a secondary circuit (122) with a second conveyor (132) in which the secondary circuit (122) branches off the primary circuit (121) in a first node (K1) arranged downstream of the first conveyor (131) and in a second node (K2) arranged downstream of the first node (K1) of the primary circuit (121) the primary circuit (121) opens, wherein preferably the second conveyor (132) is speed controlled.
    [17]
    17. conditioning device (5) according to claim 16, characterized in that the cooling circuit (12) between the first node (Kl) and the second node (K2) of the primary circuit (121) on the one hand and the secondary circuit (122) on the other hand is valveless.
    [18]
    18. conditioning device (5) according to claim 16 or 17, characterized in that downstream of or upstream of the second conveyor, a second heat exchanger is arranged.
    [19]
    19. Conditioning device (5) according to claim 13, wherein at least one conveying device (13;
    [20]
    20. conditioning device (5) according to any one of claims 8 to 19, characterized in that the control unit (7) at least a second simulation model (90) for determining the dead times of the conditioning device (5) and / or control parameters of the conditioning (5 ) for performing a predictive control. 2017 05 12 / Fu
    类似技术:
    公开号 | 公开日 | 专利标题
    DE112007002846B4|2021-06-24|Apparatus and method for cooling electrical equipment
    DE102013205229A1|2013-10-02|Engine cooling system control
    DE102009040548A1|2010-05-06|System for estimating engine coolant temperature
    DE102015216489A1|2016-06-09|SYSTEM AND METHOD FOR COOLING AN ELECTRIC VEHICLE
    DE102013214838A1|2014-05-15|Internal combustion engine with liquid-cooled cylinder head and liquid-cooled cylinder block and method for operating such an internal combustion engine
    DE102013205009A1|2013-10-02|Engine cooling system control
    DE102013204703A1|2013-10-02|ENGINE COOLING SYSTEM CONTROL
    DE102013205124A1|2013-10-02|Engine cooling system control
    DE10234608A1|2004-02-19|Method for operating a cooling and heating circuit of a motor vehicle
    DE102012200003A1|2013-07-04|Liquid-cooled internal combustion engine and method for operating such an internal combustion engine
    DE102009002890A1|2010-11-11|Method and device for monitoring a charge air cooler bypass valve
    DE102011116923A1|2012-05-03|Method for controlling exhaust heat recovery systems in vehicles
    DE102015221167A1|2016-05-04|Method for controlling a temperature regulating system of a machine tool
    EP3293504B1|2019-04-03|Method for the regulation or control of the thermal conditions on a test bench
    DE102017111976B4|2021-10-07|ENGINE COOLANT SYSTEM FOR DETECTING A COOLANT LEAK BY EVALUATING THE ELECTRICAL SIGNALS OF A COOLANT PUMP
    DE102012113220A1|2014-04-24|Return fuel cooling system for an LPI vehicle and control method thereof
    DE4426494A1|1996-02-01|Vehicle IC engine cooling system monitoring device
    DE102013222192A1|2014-05-08|Adjusting an energy storage system thermoconditioning setpoint based on a historical usage
    EP1454039B1|2008-01-23|Method for the temperature regulation of an engine
    DE102013214728A1|2014-03-06|A method and system for adapting engine coolant temperature | warm-up history based on heater core load to adjust passenger compartment temperature
    DE19624078A1|1997-12-18|Procedure for correct outside temperature detection
    AT519170B1|2019-02-15|METHOD FOR CONTROLLING OR CONTROLLING THE THERMAL CONDITIONS ON A TEST BENCH
    DE102018127788A1|2019-05-29|Equation-based state estimator for cooling system controller
    DE102013215770B4|2017-11-02|DIAGNOSIS OF THE BEHAVIOR OF A HEATER AND A PUMP FOR A TEMPERATURE SYSTEM OF A HYBRID BATTERY
    EP1550927A2|2005-07-06|Method, apparatus and computer program for the determination of a control variable for the temperature regulation of a system
    同族专利:
    公开号 | 公开日
    AT519170B1|2019-02-15|
    AT15462U1|2017-09-15|
    AT519170A3|2018-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE10301314A1|2003-01-15|2004-07-29|Behr Gmbh & Co. Kg|Cooling circuit, in particular for a motor vehicle transmission|
    DE102004033394B3|2004-07-09|2005-12-22|Siemens Ag|Method for controlling an internal combustion engine|
    FR2879742B1|2004-12-16|2007-04-13|Renault Sas|AIR BLOWING DEVICE FOR COOLING THE INTERNAL COMBUSTION ENGINE OF A VEHICLE TESTED ON A ROLLER BENCH|
    JP2008128809A|2006-11-21|2008-06-05|Sanki Eng Co Ltd|Temperature adjustment device for testing|
    DE102009022675A1|2009-05-26|2010-12-16|Horiba Europe Gmbh|Test bench with temperature-controlled cooling fan|
    DE102013100099A1|2013-01-08|2014-07-10|Fev Gmbh|Test arrangement for operating test specimen, has bypass line that branches off from supply line in upstream of test specimen, where resources diverted from bypass line flow back to supply line feeding conveyor|AT523059B1|2019-11-12|2021-05-15|Avl List Gmbh|Device and method for conditioning an operating fluid|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATGM50193/2016U|AT15462U1|2016-09-13|2016-09-13|METHOD AND DEVICE FOR CONTROLLING OR CONTROLLING THE THERMAL CONDITIONS ON A TEST BENCH|EP17190334.7A| EP3293504B1|2016-09-13|2017-09-11|Method for the regulation or control of the thermal conditions on a test bench|
    [返回顶部]