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Kind code of ref document: Method involves starting of calibration test for start condition and for calibration definite changes in the parameter are to be adjusted. At least two of the parameters, throttle valve position 2 or load, fuel-air relationship 4firing angle 5exhaust gas lead line 6amount of fuel e. The parameters also includes injection pressure, guide blade position of a turbo compressor with variable blade position, valve lift and injecting modulation.
The automatisierte binarsignale invention relates to a method for optimizing the calibration of an internal combustion engine and in particular an internal combustion engine for a motor vehicle. Although the invention is described below substantially with respect to automobiles, the use automatisierte binarsignale not limited to use on motor vehicles, but the invention can also in the calibration of aircraft and ship engines and the automatisierte binarsignale.
Modern internal combustion engines are subject to increasing demands relating to automatisierte binarsignale consumption, the performance and emission behavior. Besides the classical setting variables amount of fuel, the fuel-air ratio have additional parameters such as the parameters of the exhaust gas aftertreatment system and the parameters of exhaust automatisierte binarsignale recirculation, are considered.
Furthermore, the valve timing automatisierte binarsignale well as the guide vane of a possibly existing turbo-compressor variable vane position affects the operating point of the internal combustion engine. All these influencing variables affect fuel consumption and exhaust and noise emissions of the engine. Therefore, each operating point of automatisierte binarsignale motor is affected by a number of parameters, so that the number of possible combinations of the parameters automatisierte binarsignale exponentially.
When calibrating a passage through all possible screen dots due to the variety of the applied parameter is therefore no longer reasonably possible. Therefore, new optimization methods are needed. Im Stand der Technik bekannte Verfahren arbeiten z. Design automatisierte binarsignale Experiment DoEum die besten Kalibrierungsparamter zu bestimmen.
Design of Experiment DoE english to determine the best calibration paramters using the statistical design of experiments as. With this system, great progress has been made. Nevertheless, based thereon systems on the one hand the disadvantage that it is only possible to optimize stationary engine conditions and, secondly, automatisierte binarsignale an automatic calibration of exhaust aftertreatment systems is possible only after a given test plan, but not dependent on the current results.
A disadvantage is that only static data is recorded. Eine umfassende Optimierung der Kalibrierung eines Verbrennungsmotors ist aus dieser Automatisierte binarsignale nicht bekannt. A comprehensive optimization of the calibration of an internal combustion engine is not known from this document. In order to optimize the dynamic states of an internal combustion engine, Automatisierte binarsignale of Haffner in MTZ Automatisierte binarsignale 61 10, page et seq.
A disadvantage of this known method is that no uniform distribution of the measuring points automatisierte binarsignale present. Therefore, a long time period is needed to ensure that all possible parameter combinations are covered by adequately operating points. The random definition of the measurement points, the result of the system model is affected.
It is therefore the object of the present invention to provide a method for optimizing the calibration of internal combustion engines are available, which allows reduced costs of the calibration, a higher quality of the system model. According to the invention this object is achieved by a method having the features of claim 1.
Advantageous further developments are subject automatisierte binarsignale the subclaims. The inventive method for optimizing the calibration of internal combustion engines is performed taking into account dynamic changes of state automatisierte binarsignale the engine using a neural network.
The calibration test will start from a automatisierte binarsignale condition and calibration defined changes of parameters. The process has many advantages.
Characterized in that the calibration test starts from a start condition of is achieved, that reproducible conditions are present in the calibration. As defined changes of the parameters are set, subject automatisierte binarsignale the calibration of non-random influences that are caused by the random selection of measurement points. The automatisierte binarsignale of the system model is improved, and as a consequence the results will be improved in economy and emissions at constant power range of the engine.
Furthermore, the cost is reduced for the calibration, thus time and cost advantages. In a preferred embodiment of the method the parameters are changed in automatisierte binarsignale defined sequence. In particular, it is possible that the parameters are changed in a predefined order. In a further preferred development of the invention, at least two of the parameters throttle position, load, air-fuel ratio, ignition angle, exhaust gas recirculation rate, fuel quantity, injection pressure, the guide vane of a possibly existing turbo-compressor variable vane position, valve timing, injection timing and injection modulation are changed in a defined sequence.
Preferably, three, four, five or more of the above parameters are automatisierte binarsignale in a defined sequence. It is possible that automatisierte binarsignale certain measurement points, the variation of one automatisierte binarsignale more parameters is omitted. Preferably in a development of the method according to the invention at least two, preferably at least three of the parameters changed throttle position, load, air-fuel automatisierte binarsignale, ignition angle and EGR fraction in this order.
In this variant, it is possible that is not varied at certain measurement points of one of the parameters, but is passed directly to automatisierte binarsignale next parameter automatisierte binarsignale even measurement point. According to a preferred development of one or more of the previously described embodiments of the invention, a parameter change is performed in both directions, so that initially a parameter change then a change in the parameter is performed in the reverse direction in a first direction and.
Such a procedure is very advantageous, since various temperature conditions, and other hysteresis effects are taken into account due to the different directions of the parameter changes. Thus, the measurement results of a dynamic engine condition may automatisierte binarsignale on whether the opening is increased or reduced, at a given throttle position as a function. By changing the parameter in both directions to a specific measuring point towards temperature and hysteresis effects are taken into account.
In certain embodiments of the invention, the start condition is adjusted between parameter changes. Die Startbedingung kann der Leerlaufzustand des Motors sein, die Startbedingung kann jedoch auch im Laufe des Kalibrierungsvorgangs variiert werden, zB nach automatisierte binarsignale vordefinierten Profil. The start condition of the idling state of the engine may be, however, the start condition can also be varied in the course of the calibration process, for example after a predefined profile.
Vorzugsweise wird das neuronale Netzwerk online trainiert. Preferably, the neural automatisierte binarsignale is trained online. Furthermore, it is preferred that the neural network determines the next or the parameters for the following test itself.
In a preferred embodiment automatisierte binarsignale the method according to the invention, a vehicle's cooling system is used for engine cooling. This has significant advantages, since the motor is subjected to the real cooling conditions. Preferably, the calibration is carried out with a real load, while the speed and torque of the motor to be kept constant in the conventional method, automatisierte binarsignale the parameters are changed. In this embodiment of the method an increase in throttle position results directly increasing the speed, as is the case in reality.
In preferred embodiments of one or more of the process procedures described above equidistant changes to the parameters in the calibration preferably be made. Further features, properties and advantages of the present invention will become apparent from the following description of the embodiment with reference to the accompanying drawings.
In Figur 1 ist stark schematisch und beispielhaft eine Struktur eines Systemmodells eines Verbrennungsmotors 1 dargestellt. On the current automatisierte binarsignale point of the engine 1 different parameters affect a, the exhaust emissions 11, the noise 12, the current consumption and 13 influence the output power of the engine Beispielsweise wirkt die Drosselklappenstellung 2 auf die Drehzahl des Verbrennungsmotors 1 ein.
For example, acts automatisierte binarsignale, a throttle position to the rotational speed of the engine. An increase in the current applied to the engine 1 load 3 with otherwise unchanged parameters cause a decrease in the rotational speed of the internal combustion engine while reducing the load usually an increase in the rotational speed caused. Further influencing the fuel-air ratio is 4, the firing angle of 5, the EGR fraction 6 and other parameters not shown, such as the fuel quantity or the guide vane automatisierte binarsignale a possibly existing turbo-compressor variable vane position and the current operating state of the engine 1, the respective the operating point has automatisierte binarsignale exhaust emissions 11, noise 12, a corresponding consumption 13 and a corresponding power output fourteenth.
When calibrating individual parameters are changed specifically. The variation of the different parameters for a particular operating point occurs, in decreasing order of the corresponding parameter, such that the first parameter is varied, its influence is known to be the most important.
Bei dem in Fig. In the illustrated in Automatisierte binarsignale. A corresponding procedure is also possible with the variation of other parameters and preferred. At a first time 21, a first firing angle 31 is automatisierte binarsignale corresponding to the start condition for this measurement point.
The period during which set a certain firing angle can also be set shorter or longer. Zur Berechnung und Automatisierte binarsignale der Werte wird ein neuronales Netz eingesetzt, wie es aus dem insgesamt bekannten und insbesondere dem angegebenen Stand der Technik bekannt ist. Here, the neural network is trained online and can determine the parameter variations for the next operating point itself. If, in the variation of the automatisierte binarsignale for a measuring point the statutory requirements are satisfied to a sufficient extent and the in-house regulations have also been achieved, can be apart from a further automatisierte binarsignale of parameters known to have less influence on the measurement result to automatisierte binarsignale calibration total to speed up or to enable a larger number of parameter variations without automatisierte binarsignale a total time required for the more critical points of measurement.
A method for optimizing the calibration of internal combustion engines, changes in the parameters are set taking into account dynamic changes of state of the engine, using a neural network, wherein the calibration test starts from a start condition and defined for calibration.
The method of claim 1, wherein the parameters are changed automatisierte binarsignale a defined sequence. Verfahren nach Anspruch 1 oder 2, bei dem wenigstens zwei der Parameter Drosselklappenstellung bzw. A method according to claim 1 or 2, wherein at least two of the parameters throttle position or load, air-fuel ratio, ignition angle, exhaust gas recirculation rate, fuel quantity, injection pressure, the guide vane of a turbocompressor with variable vane position, valve opening automatisierte binarsignale, valve lift and injection modulation are changed in a defined sequence.
Verfahren nach Anspruch 1 oder 2 oder 3, automatisierte binarsignale dem wenigstens zwei, vorzugsweise wenigstens drei der Parameter Drosselklappenstellung bzw.
The method of claim 1 or 2 or 3, wherein at least two, preferably at least three of the parameters throttle position or load, air-fuel ratio, ignition angle and EGR fraction changed in this order. A method according to at least one in which a automatisierte binarsignale change is performed first in a first direction and then in the opposite direction of the preceding claims. The method of claim 5, wherein the start condition is adjusted between the parameter changes.
A method according to at least one of the preceding claims, wherein the starting condition of idling of the internal combustion engine. A method according to at least one in which the start condition is changed in the course of calibration of the preceding claims. A method according to at least one of the preceding claims, characterized in that the neural network is trained online. A method according to at least one of the preceding claims, in which the neural network determines the next parameter for automatisierte binarsignale following test.
The process as claimed in which a vehicle cooling system is used for cooling the engine of the preceding claims. A method according to at least one in which the calibration is carried out with a real load of the preceding claims. A method according to at least one of the preceding claims, be carried out at the substantially equidistant changes in the parameters.
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