Method for automatically or self - tuning at least one operating parameter of an engine order cancellation device

Abstract

A method for automatically or self - tuning at least one operating parameter of an engine order cancellation (“EOC”) device (2), the EOC device (2) being operable based on a plurality of operating parameters, comprising the steps of: providing a defined tuning rule for automatically or self - tuning at least one operating parameter of the EOC device (2); and automatically or self - tuning the at least one operating parameter of the EOC device (2) based on the provided tuning rule.

Description

Technical Field

[0001] The present invention relates to a method for automatically or self - tuning at least one operating parameter of an engine order cancellation device, which can operate based on a plurality of operating parameters. Background Art

[0002] Engine order cancellation (“EOC”) devices, sometimes also denoted as active noise cancellation (“ANC”) devices, are generally known from the prior art.

[0003] The main purpose of the corresponding EOC device is to reduce the unwanted engine noise in the passenger compartment, which results from the operation of the engines of various vehicles. The frequency components of each engine noise are generally related to the engine speed (engine rotational speed) and its harmonic components (the so - called “orders”). This correlation between the engine noise and the engine speed is used by the corresponding EOC device for coordinated control, namely, in particular, to reduce the engine noise in the passenger compartment.

[0004] The corresponding EOC device achieves the actual noise reduction by generating an acoustic compensation signal that is generally opposite in phase to the engine noise in the passenger compartment, thereby eliminating or reducing the engine noise in the passenger compartment.

[0005] The corresponding EOC device generally includes many operating parameters that must be tuned to reliably and satisfactorily cancel the engine noise in the passenger compartment.

[0006] However, the tuning of the individual operating parameters is a very cumbersome process that requires specially educated tuning personnel to manually tune each operating parameter under different operating states of the engine, such as at different engine speeds, different engine torques, etc. Summary of the Invention

[0007] Therefore, the object of the present invention is to provide a method that allows for more effective, especially automatic, tuning of at least one operating parameter of an engine order cancellation device.

[0008] According to claim 1, this object is achieved by a method for automatically or self - tuning at least one operating parameter of an engine order cancellation device, said engine order cancellation device being operable based on a plurality of operating parameters. The claims dependent on claim 1 relate to possible embodiments of the method according to claim 1.

[0009] A first aspect of the present invention relates to a method for automatically or self - tuning at least one operating parameter of an engine order cancellation (“EOC”) device, said EOC device being operable based on a plurality of operating parameters.

[0010] The term "EOC device" includes any device configured to eliminate or reduce engine noise in a passenger compartment or a vehicle compartment, which engine noise is generated by operating the engine (usually an internal combustion engine) of the corresponding motor vehicle or vehicle associated with the EOC device. Thus, an EOC device can also be regarded as or represented as an active noise cancellation ("ANC") device.

[0011] The corresponding EOC device tunable by the method described herein is configured to generate an acoustic compensation signal that is generally out of phase with the engine noise in the passenger compartment of the corresponding motor vehicle associated with the EOC device.

[0012] Thus, the corresponding EOC device can include at least one acoustic compensation signal generation device implemented as hardware and / or software, the acoustic compensation signal generation device being configured to generate an acoustic compensation signal generally out of phase with the engine noise in the passenger compartment, and at least one acoustic signal emission device, such as a speaker device, the acoustic signal emission device being configured to emit the corresponding acoustic compensation signal in the passenger compartment of the corresponding vehicle associated with the EOC device.

[0013] Generally, the EOC device further includes at least one acoustic signal recording device, such as a microphone device, which is configured to record the engine noise in the passenger compartment of the corresponding motor vehicle associated with the EOC device.

[0014] A pair of at least one acoustic signal emission device and at least one acoustically distributed acoustic recording device can establish an acoustic channel of the EOC device. The EOC device can include a plurality of corresponding acoustic channels.

[0015] The operation of the EOC device and its sub-units, namely at least one acoustic compensation signal generation device, at least one acoustic signal emission device and at least one acoustic signal recording device, is controlled by a control unit implemented as hardware and / or software of the EOC device.

[0016] In any case, the EOC device is operable, or operates based on a number of operating parameters. These operating parameters must be adjusted in order to reliably and satisfactorily eliminate engine noise in the vehicle compartment associated with the EOC device. Examples of corresponding operating parameters include step size (μ factor or value) and forgetting factor (λ factor or value).

[0017] The method described herein is directed to a special method for (fully) automatically tuning at least one operating parameter of the EOC device, which allows omission of cumbersome manual tuning by specially educated tuning personnel.

[0018] The method includes the following steps: providing a definable or defined tuning rule for automatically or automatically tuning at least one operating parameter of the EOC device, and automatically or automatically tuning the at least one operating parameter of the EOC device based on the provided tuning rule. The method can be implemented for a single operating parameter of the EOC device (at least one given operating state of the engine and / or at least one sound channel of the EOC device), multiple operating parameters of the EOC device (at least one given operating state of the engine and / or at least one sound channel of the EOC device), or all operating parameters of the EOC device (at least one given operating state of the engine and / or at least one sound channel of the EOC device).

[0019] In the first step of the method, a definable or defined tuning rule is provided for automatically or automatically tuning at least one operating parameter of the EOC device. The tuning rule generally includes a defined sequence of processing rules or steps that must be processed to automatically or automatically tune the corresponding operating parameter of the EOC device. The tuning rule and the corresponding processing rules or steps are generally defined for tuning at least one specific operating parameter of the EOC device in a specific operating state of the engine associated with the EOC device and / or for a specific sound channel of the EOC device. Therefore, different tuning rules can be applied to tune different operating parameters of the EOC device and / or different operating states of the engine associated with the EOC device and / or for a specific sound channel of the EOC device.

[0020] The corresponding tuning rule can be implemented in hardware and / or software. The corresponding tuning rule can include a tuning algorithm that includes at least one defined sequence of processing rules or steps that must be processed in order to automatically or automatically tune the corresponding operating parameter of the EOC device.

[0021] Specifically, the corresponding tuning rule can be provided on a machine-readable medium (such as a data carrier) including machine-readable instructions, which, when executed by a processor of a control unit implemented as hardware and / or software of an EOC device configured to implement the method, cause the EOC device to implement the method described herein.

[0022] In the second step of the method, the at least one operating parameter of the EOC device can be tuned automatically or autonomously based on the provided tuning rules. Thus, the second step includes applying the tuning rules in order to tune the corresponding operating parameters of the EOC device, especially at a specific operating state of the engine associated with the EOC device and / or for a specific sound channel of the EOC device. Specifically, the second step includes that the corresponding operating parameters of the EOC device are or will be tuned automatically, especially at a specific operating state of the engine associated with the EOC device and / or for a specific sound channel of the EOC device.

[0023] According to the specific processing rules or steps defined in the correspondingly applied tuning rules, the above steps of the method can be executed to tune one or more operating parameters of the EOC device, especially at a specific operating state of the engine associated with the EOC device and / or for a specific sound channel of the EOC device. In other words, the corresponding tuning rules can include processing rules or steps for tuning one, several or all specific operating parameters of the EOC device, especially processing rules or steps at a specific operating state of the engine associated with the EOC device and / or for a specific sound channel of the EOC device.

[0024] Thus, the method allows for the automatic tuning of at least one operating parameter of the EOC device without the need for laborious manual tuning by specially educated tuning personnel. Thus, the method allows for the effective tuning of at least one operating parameter of the EOC device and, therefore, is an improvement compared to existing methods for tuning the EOC device.

[0025] According to an exemplary embodiment of the method, the tuning rules provided and applied to tune the at least one operating parameter of the EOC device, especially for at least one specific operating state of the engine, may include the following steps:

[0026] a) Select a first value and a second value within the value range of the operating parameter of the EOC device to be tuned;

[0027] b) Apply a first processing rule, especially a calculation rule, to the selected first and second values of the operating parameter of the EOC device, and sum the selected first and second values according to the first processing rule, thereby obtaining the sum of the selected first and second values;

[0028] c) Apply a second processing rule, especially a calculation rule, to the sum of the selected first and second values, and divide the sum of the selected first and second values by a division factor according to the second processing rule, thereby obtaining a result value;

[0029] d) Determine whether the EOC device is operable, operating under stable operating conditions, or operating under unstable operating conditions when operating the EOC device based on the result value;

[0030] e) If it is determined that the EOC device is operating under unstable operating conditions when operating the EOC device based on the result value, repeat steps b)-d), and use the result value as the second value, or

[0031] If it is determined that the EOC device is operating under stable operating conditions when operating the EOC device based on the result value, repeat steps b)-d), and use the result value as the first value.

[0032] According to an exemplary embodiment of the method, a tuning rule for providing and applying at least one operating parameter for tuning the EOC device, especially for at least one specific operating state of the engine, may include the following steps:

[0033] a) Select a first value and a second value within the value range of the operating parameter of the EOC device to be tuned. The first value can be represented as value A, and the second value can be represented as value B. Thus, for a first type of adjustable parameter of the EOC device - this first type of adjustable parameter can be represented as a type 1 parameter - assume that the first value A is the value when the EOC device is (ensured) stable, and the second value B is the value when the EOC device is (ensured) unstable; or thus, for a second type of adjustable parameter of the EOC device - this second type of adjustable parameter can be represented as a type 2 parameter - it may be assumed that the first value A is the value when the EOC device is (ensured) unstable, and the second value B is the value when the EOC device is (ensured) stable; and assume that the selected first value A and second value B satisfy the following condition: A < B;

[0034] b) Apply a first processing rule, especially a calculation rule, to the selected first value A and second value B of the operating parameter of the EOC device. According to the first processing rule, obtain an intermediate value C using weights w1 and (1 - w1): C = w1 * A + (1 - w1) * B. The intermediate value C is the weighted sum of the selected first value A and second value B, where 0 < w1 < 1 is a static or dynamically selectable weight; in the most common case, w1 = 0.5;

[0035] c) Determine whether the EOC device is operable, operating under stable operating conditions, or operating under unstable operating conditions when operating the EOC device based on the result value C;

[0036] d) If it is determined that the EOC device operates under unstable operating conditions when operating the EOC device based on the result value C, repeat steps b)-c) for the type 1 parameter and use the result value C as the new second value B, or

[0037] If it is determined that the EOC device operates under stable operating conditions when operating the EOC device based on the result value C, repeat steps b)-c) for the type 1 parameter and use the result value C as the new first value A.

[0038] Or, if it is determined that the EOC device operates under unstable operating conditions when operating the EOC device based on the result value C, repeat steps b)-c) for the type 2 parameter and use the result value C as the new second value B.

[0039] Or, if it is determined that the EOC device operates under stable operating conditions when operating the EOC device based on the result value C, repeat b)-c) for the type 2 parameter and use the result value C as the new first value A.

[0040] According to an exemplary embodiment of the method, when it is determined that the EOC device emits (or will emit) an undesirable, in particular audible, noise artifact, unstable operating conditions when operating the EOC device based on the result value are usually given. In other words, determining the emission of an undesirable, in particular audible, noise artifact usually represents unstable operating conditions of the EOC device. The applicant has specified suitable exemplary principles for detecting unstable operating conditions when operating the EOC device based on the corresponding result value in the following application filed on the same day as the present application: PCT / EP2019 / 077024.

[0041] According to an exemplary embodiment of the method, the above steps a) to c) of the tuning rule can be repeated until a specific stop condition is met. Thus, when the stop condition is met, the implementation of steps a) to e) of the tuning rule is at least temporarily stopped.

[0042] According to an exemplary embodiment of the method, the stop condition may be satisfied when the difference between the finally determined second value B and the first value A exceeds or is lower than a predefined reference value. Thus, a third processing rule, in particular a calculation rule, may be applied to the first and second values, subtracting the first value from the second value according to the third processing rule to obtain the difference between the finally determined first and second values; and applying a comparison rule to the obtained difference, comparing the obtained difference with the predefined reference value according to the comparison rule to determine whether the difference between the finally determined second value B and the first value A is lower than the predefined reference value. Similarly, the corresponding reference value may be determined by a tuning experiment or based on the technical specifications of the EOC device (such as a predefined reference value). The corresponding reference value may also be a static or dynamic numerical value, i.e., fixed, or, for example, depending on the operating state of the engine.

[0043] According to an exemplary embodiment of the method, the stop condition may be satisfied when the operating state of the engine changes or is changed. For example, when the load of the engine changes, the operating state of the engine may change.

[0044] If the operating state of the engine changes, the finally obtained values of A, B, and C may be stored in a storage device. The finally obtained values of A, B, and C may in particular be stored in a specific location corresponding to the operating state of the engine. If, in the new operating state of the engine, the stop condition is not satisfied before, steps a)-e) may be continued in this operating state.

[0045] According to an exemplary embodiment of the method, the corresponding result value C is assigned to the corresponding first value A as a type 1 parameter, or to the corresponding second value B as a type 2 parameter, as described in steps a)-d), to ensure the stable state of the EOC device.

[0046] According to an exemplary embodiment of the method, a predefined offset value may be applied. For example, for a type 1 parameter, a predefined offset value may be subtracted from the corresponding result value, the offset value being determined by the corresponding first value. For a type 2 parameter, the corresponding predefined offset value may be added to the corresponding result value, the offset value being determined by the corresponding second value. By applying the corresponding predefined offset value to the corresponding result value, the offset value is determined according to the corresponding difference between the second and first values, and the offset value is lower than the predefined reference value and may improve the operational safety of tuning the EOC device, because the application of the offset value allows a predefined "safety zone" to be created around the corresponding result value. The corresponding offset value may also be a static (numerical) value or a dynamic (numerical) value, for example depending on the operating state of the engine.

[0047] According to an exemplary embodiment of the method, the first value may be the last determined value for determining the stable operation of the EOC device, and the second value of the repeating step may be the last determined value for determining the unstable operation of the EOC device. This particularly applies to type 1 parameters. For type 2 parameters, the second value may be the last determined value for determining the stable operation of the EOC device, and the first value of the repeating step may be the last determined value for determining the unstable operation of the EOC device.

[0048] Therefore, for type 1 parameters, the first value may be regarded as or represented as a first threshold value, below which, particularly for a given operating state of the engine and / or a given sound channel of the EOC device and / or a given harmonic order, the stable operation of the EOC device is determined or possible, and the second value may be regarded as or represented as a second threshold value, below which, particularly for a given operating state of the engine and / or a given sound channel and / or a given harmonic order of the EOC device, the unstable operation of the EOC device is determined. For type 2 parameters, the first value may be regarded as or represented as a first threshold value, below which, particularly for a given operating state of the engine and / or a given sound channel of the EOC and / or a given harmonic order, the unstable operation of the EOC device is determined or possible, and the second value may be regarded as or represented as a second threshold value, below which, particularly for a given operating state of the engine and / or a given sound channel and / or a given harmonic order of the EOC device, the stable operation of the EOC is determined. Therefore, the defined adjustment rule can use the corresponding stability value (first value) or instability value (second value) to tune at least one operating parameter of the EOC device.

[0049] According to an exemplary embodiment of the method, zero may be used as the initial first value. Using zero as the initial first value can effectively initialize the method.

[0050] According to an exemplary embodiment of the method, tuning rules can be applied to a plurality of defined operating states of the engine to which an EOC device to be tuned can be assigned or has been assigned, particularly under a plurality of defined load states of the engine to which an EOC device to be tuned can be assigned or has been assigned. Thus, steps a)-c) of the tuning rules apply to a plurality of defined operating states of the engine to which an EOC device can be assigned or has been assigned, where at least one operating parameter of the EOC device is to be tuned, particularly under a plurality of defined load states of the engine to which an EOC device to be tuned can be assigned or has been assigned. Each operating state can be defined by different engine speeds (rotational speeds), engine torques, engine loads, etc. Thus, comprehensive tuning of the respective parameters of the EOC device is feasible because the respective operating parameters of the EOC device are tuned for different operating states of the corresponding engine.

[0051] According to an exemplary embodiment of the method, the tuning rules are applied to each sound channel of the EOC device. Thus, the above steps a)-c) can apply to each sound channel of the EOC device. Thus, comprehensive tuning of the respective operating parameters of the EOC device is feasible because the respective operating parameters of the EOC device are tuned for each sound channel of the EOC device. As described above, the respective sound channels of the EOC device are typically defined by a sound signal transmitting device (such as a speaker device) assigned to the signal transmitting device and a sound signal recording device (such as a microphone device).

[0052] According to an exemplary embodiment of the method, the tuning rules apply to each engine harmonic to be eliminated by the EOC device. Thus, the above steps a)-e) can be used for each engine harmonic to be eliminated by the EOC device. Thus, comprehensive tuning of the respective operating parameters of the EOC device is feasible because the respective operating parameters of the EOC device are tuned for each engine harmonic to be eliminated by the EOC device.

[0053] According to an exemplary embodiment of the method, the tuning rules can be applied to at least two different engine harmonics that will be eliminated by the EOC device simultaneously. Thus, the above steps a)-e) can apply to at least two different engine harmonics that will be eliminated by the EOC device simultaneously. By applying the tuning rules and the corresponding steps a)-e) to at least two different engine harmonics to be eliminated by the EOC device simultaneously, the efficiency of the method can be improved because the EOC device can be tuned for at least two different engine harmonics to be eliminated simultaneously.

[0054] According to an exemplary embodiment of the method, the tuning rule can be applied when driving a vehicle with an engine to which an EOC device is assignable or has been assigned, wherein at least one operating parameter of the EOC device is to be tuned. Thus, steps a)-e) above can be performed when driving a vehicle (automobile) with an engine to which an EOC device is assignable or has been assigned, wherein at least one operating parameter of the EOC device is to be tuned. Thus, tuning can be completed when driving a vehicle with an engine to which an EOC device is assignable or has been assigned, wherein at least one operating parameter of the EOC device is to be tuned, which ignores the requirements of a specific tuning infrastructure and allows on-site tuning of the operating parameters of the EOC device. In addition, during the "service life" of the EOC device, tuning can be performed multiple times. Thus, the aging of the EOC device (e.g., aging caused by aging effects, such as the undesired oscillation of an acoustic signal emitting device (e.g., a speaker device) at a specific frequency) can be made negligible by respectively readjusting or retuning the corresponding operating parameters of the EOC device. Such readjustment or retuning can be performed respectively during vehicle operation or during subsequent tuning.

[0055] As described above, the forgetting factor is an example of a corresponding operating parameter of the EOC device. Thus, the operating parameter of the EOC device to be tuned can be the forgetting factor of the EOC device. Similarly, the step size is an example of a corresponding operating parameter of the EOC device. Thus, the operating parameter of the EOC device to be tuned can be the step size of the EOC device.

[0056] Another aspect of the present invention relates to a device for automatically or autonomously tuning at least one operating parameter of an EOC device. The device includes a control unit configured to (in particular according to the method described herein) provide a defined tuning rule for automatically or autonomously tuning at least one operating parameter of the EOC device and to automatically or autonomously tune at least one operating parameter of the EOC device based on the provided tuning rule. All the notes regarding the method also apply to the device and vice versa.

[0057] According to an exemplary embodiment of the device, the control unit is configured to provide a tuning rule that includes the following steps:

[0058] a) Select a first value and a second value within the value range of the operating parameter of the EOC device to be tuned;

[0059] b) Apply a first processing rule, in particular a calculation rule, to the selected first and second values of the operating parameter of the EOC device, and sum the selected first and second values according to the first processing rule, thereby obtaining the sum of the selected first and second values;

[0060] c) Apply a second processing rule, in particular a calculation rule, to the sum of the selected first and second values, and divide the sum of the selected first and second values by a division factor according to the second processing rule, thereby obtaining a result value;

[0061] d) Determine whether the EOC device is operable or operating under stable operating conditions or under unstable operating conditions when the EOC device is operated based on the result value;

[0062] e) If it is determined that the EOC device is operating under unstable operating conditions when the EOC device is operated based on the result value, repeat steps b)-e), and use the result value as the second value, or

[0063] If it is determined that the EOC device is operating under stable operating conditions when the EOC device is operated based on the result value, repeat steps b)-e), and use the result value as the first value.

[0064] According to an exemplary embodiment of the device, the control unit may be configured to provide and / or implement a tuning rule, and the tuning rule includes the following steps:

[0065] a) Select a first value and a second value. The first value may be expressed as a value A within the value range of the operating parameter to be tuned of the EOC device, and the second value may be expressed as a value B. Thus, for a first type of tunable parameter of the EOC device - the first type of tunable parameter may be expressed as a type 1 parameter - assume that the first value A is the value when the EOC device is (ensured) stable, and the second value B is the value when the EOC device is (ensured) unstable; or thus, for a second type of tunable parameter of the EOC device - the second type of tunable parameter may be expressed as a type 2 parameter - it is possible that the first value A is the value when the EOC device is (ensured) unstable, and the second value B is the value when the EOC device is (ensured) stable; and assume that the selected first value A and second value B satisfy the following condition: A < B;

[0066] b) Apply a first processing rule, in particular a calculation rule, to the selected first value A and second value B of the operating parameter of the EOC device. According to the first processing rule, use weights w1 and (1 - w1) to obtain an intermediate value C: C = w1 * A+(1 - w1) * B. The intermediate value C is the weighted sum of the selected first value A and second value B, where 0 < w1 < 1 is a static or dynamically selectable weight;

[0067] c) Determine whether the EOC device is operable or operating under stable operating conditions or under unstable operating conditions when the EOC device is operated based on the result value C;

[0068] d) If it is determined that the EOC device is operating under unstable operating conditions when operating the EOC device based on the result value C, then steps b)-c) are repeated for the type 1 parameter, and the result value C is taken as the new second value B, or

[0069] If it is determined that the EOC device is operating under stable operating conditions when operating the EOC device based on the result value C, then steps b)-c) are repeated for the type 1 parameter, and the result value C is taken as the new first value A.

[0070] Alternatively, if it is determined that the EOC device is operating under unstable operating conditions when operating the EOC device based on the result value C, the control unit may be configured to repeat steps b)-c) for the type 2 parameter, and the result value C is taken as the new second value B.

[0071] Alternatively, if it is determined that the EOC device is operating under stable operating conditions when operating the EOC device based on the result value C, the control unit may be configured to repeat steps b)-c) for the type 2 parameter, and the result value C is taken as the new first value A.

[0072] According to an exemplary embodiment of the device, the control unit may further include a selection unit implemented as hardware and / or software for selecting a first value and a second value within a value range for a specific operating parameter of the EOC device to be tuned, and a processing unit, in particular a computing unit, implemented as hardware and / or software for applying corresponding first processing rules, in particular computing rules, to the selected first and second values of the operating parameters of the EOC device to obtain a result value; and a determination unit implemented as hardware and / or software for determining whether the EOC device is operable or operating under stable operating conditions or under unstable operating conditions when operating the EOC device based on the result value.

[0073] Another aspect of the present invention relates to an EOC device for a vehicle (in particular an automobile), the EOC device including at least one device for automatically or self-tuning at least one operating parameter of the EOC device described herein. All the notes regarding the device also apply to the EOC device, and vice versa.

[0074] Another aspect of the present invention relates to a vehicle, in particular an automobile, which includes at least one engine, in particular an internal combustion engine, and an EOC device as described herein. All the notes regarding the EOC device also apply to the vehicle, and vice versa. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Exemplary embodiments of the present invention are described with reference to the accompanying drawings, in which:

[0076] Figure 1 shows a schematic diagram of a vehicle including an EOC device according to an exemplary embodiment; and

[0077] Figure 2 shows a schematic diagram of a device for automatically or self - tuning at least one operating parameter of an EOC device according to an exemplary embodiment. Detailed implementation

[0078] Figure 1 shows a schematic diagram of a vehicle 1 (automobile) including an EOC device 2 according to an exemplary embodiment. As can be clearly seen from below, the EOC device 2 is configured to implement a method for automatically or self - tuning at least one operating parameter of the EOC device 2.

[0079] The EOC device 2 is configured to generate an acoustic compensation signal 3, which is generally out of phase with the engine noise 4 in the passenger compartment 6 of the vehicle 1 associated with the EOC device 2. The engine noise 4 results from the operation of the engine 5 of the vehicle 1.

[0080] The EOC device 2 includes at least one hardware - and / or software - implemented acoustic compensation signal generation device 7, the acoustic compensation signal generation device 7 being configured to generate an acoustic compensation signal 3, which is generally out of phase with the engine noise 4 in the passenger compartment 6, at least one acoustic signal recording device point, such as a microphone device, through at least one acoustic signal transmitting device 8, such as a loudspeaker device, the acoustic signal transmitting device 8 being configured to emit the corresponding acoustic compensation signal 3 in the passenger compartment 6, and at least one acoustic signal recording device 9, such as a microphone device, the acoustic signal recording device 9 being configured to record the engine noise 4 in the passenger compartment 6.

[0081] A pair of at least one acoustic signal transmitting device 8 and at least one acoustically - allocated acoustic recording device 9 can form an acoustic channel of the EOC device 2. The EOC device 2 can include a plurality of corresponding acoustic channels.

[0082] The operation of the EOC device 2 and its sub - units, namely the acoustic compensation signal generating device 7, at least one acoustic signal transmitting device 8 and at least one acoustic signal recording device 9, is controlled by the hardware and / or software of the implementation control unit 10 of the EOC device 2.

[0083] In any case, the EOC device 2 can operate or be based on a plurality of operating parameters. These operating parameters must be tuned in order to reliably and satisfactorily eliminate engine noise in the passenger compartment 6 of the vehicle 1 associated with the EOC device 2. Examples of corresponding operating parameters include step size (μ - factor or value) and forgetting factor (λ - factor or value). Generally, for a specific engine order and a specific acoustic channel, each operating parameter is independent.

[0084] The method implemented or implementable by the EOC device allows for a special way of (partially or fully) automatically tuning at least one operating parameter of the EOC device 2, which allows for the omission of the cumbersome manual tuning by a specially educated tuning person.

[0085] The method includes the following steps: providing definable or defined tuning rules for automatically or automatically tuning at least one operating parameter of the EOC device 2, and automatically or automatically tuning at least one operating parameter of the EOC device 2 based on the provided tuning rules. The method can be implemented for a single operating parameter of the EOC device 2 (at least one given operating state of the engine 5 and / or at least one sound channel of the EOC device 2), multiple operating parameters of the EOC device 2 (at least one given operating state of the engine 5 and / or at least one sound channel of the EOC device 2), or all operating parameters of the EOC device 2 (at least one given operating state of the engine 5 and / or at least one sound channel of the EOC device 2).

[0086] In the first step of the method, definable or defined tuning rules for automatically or automatically tuning at least one operating parameter of the EOC device 2 are provided. The tuning rules generally include a defined sequence of processing rules or steps that must be processed to automatically or automatically tune the corresponding operating parameter of the EOC device 2. The tuning rules and the corresponding processing rules or steps are generally defined for at least one specific operating parameter of the EOC device 2, at least one specific operating state of the engine 5 associated with the EOC device 2, and / or a specific sound channel of the EOC device 2. Thus, different tuning rules can be applied to tune different operating parameters of the EOC device 2 and / or different operating states of the engine 5 associated with the EOC device 2 and / or a specific sound channel of the EOC device 2.

[0087] The corresponding tuning rules can be implemented in hardware and / or software. The corresponding adjustment rules can include an adjustment algorithm that includes at least one defined sequence of processing rules or steps that must be processed to automatically or automatically tune the corresponding operating parameter of the EOC device 2.

[0088] In particular, the corresponding tuning rules are provided on a machine-readable medium 11 (such as a data carrier), which includes machine-readable instructions that, when executed by a processor of a control unit 10 implemented as hardware and / or software of the EOC device 2 configured to implement the method, cause the EOC device 2 to execute the method.

[0089] In the second step of the method, at least one operating parameter of the EOC device 2 can be tuned automatically or self-tuned based on the provided tuning rules. Thus, the second step includes applying the tuning rules in order to tune the corresponding operating parameters of the EOC device 2, especially in specific operating states of the engine 5 associated with the EOC device 2 and / or for specific sound channels of the EOC device 2.

[0090] Specifically, the second step includes applying the tuning rules to the corresponding operating parameters of the EOC device 2 such that the corresponding parameters of the EOC device 2 are being or will be tuned automatically, especially in specific operating states of the engine 5 associated with the EOC device 2 and / or for specific sound channels of the EOC device 2.

[0091] According to the specific processing rules or steps defined in the correspondingly applied tuning rules, the above steps of the method can be carried out to tune one or more operating parameters of the EOC device 2, especially in specific operating states of the engine 5 associated with the EOC device 2 and / or for specific sound channels of the EOC device 2. In other words, the corresponding tuning rules can include processing rules or steps for tuning one, several or all specific operating parameters of the EOC device, especially in specific operating states of the engine 5 associated with the EOC device 2 and / or for specific sound channels of the EOC device 2.

[0092] Thus, the method allows for the automatic tuning of at least one operating parameter of the EOC device 2 without the need for laborious manual tuning by specially educated tuning personnel. Thus, the method allows for the efficient tuning of at least one operating parameter of the EOC device 2 and is thus an improvement over existing methods for tuning the EOC device.

[0093] According to an exemplary embodiment of the method, the tuning rules provided and applied to tune at least one operating parameter of the EOC device 2, especially for at least one specific operating state of the engine 5, can include the following steps:

[0094] a) Select a first value and a second value within the value range of the operating parameter of the EOC device 2 to be tuned;

[0095] b) Apply a first processing rule, especially a calculation rule, to the selected first and second values of the operating parameter of the EOC device 2, and sum the selected first and second values according to the first processing rule, thereby obtaining the sum of the selected first and second values;

[0096] c) Apply a second processing rule, especially a calculation rule, to the sum of the selected first and second values, and divide the sum of the selected first and second values by a division factor, such as 2, according to the second processing rule, thereby obtaining a result value;

[0097] d) Determine whether the EOC device 2 is operable or operating under stable operating conditions or under unstable operating conditions when operating the EOC device 2 based on the result value;

[0098] e) If it is determined that the EOC device 2 is operating under unstable operating conditions when operating the EOC device 2 based on the result value, repeat steps b)-e), and use the result value as the second value, or

[0099] If it is determined that the EOC device 2 is operating under stable operating conditions when operating the EOC device 2 based on the result value, repeat steps b)-e), and use the result value as the first value.

[0100] According to an exemplary embodiment of the method, at least one operating parameter provided and applied to tune the EOC device 2, in particular a tuning rule for at least one specific operating state of the engine 5, may include the following steps:

[0101] a) Select a first value and a second value within the value range of the operating parameter of the EOC device 2 to be tuned. The first value can be represented as value A, and the second value can be represented as value B. Thus, for the first type of adjustable parameter of the EOC device 2 - the first type of adjustable parameter can be represented as type 1 parameter, assume that the first value A is the value when the EOC device 2 is (ensured) stable, and the second value B is the value when the EOC device 2 is (ensured) unstable; or thus, for the second type of adjustable parameter of the EOC device 2 - the second type of adjustable parameter can be represented as type 2 parameter - it may be assumed that the first value A is the value when the EOC device 2 is (ensured) unstable, and the second value B is the value when the EOC device 2 is (ensured) stable; and assume that the selected first value A and second value B satisfy the following condition: A < B;

[0102] b) Apply a first processing rule, in particular a calculation rule, to the selected first value A and second value B of the operating parameter of the EOC device 2. According to the first processing rule, obtain an intermediate value C using weights w1 and (1 - w1): C = w1*A + (1 - w1)*B. The intermediate value C is the weighted sum of the selected first value A and second value B, where 0 < w1 < 1 is a static or dynamically selectable weight; in the most common case, w1 = 0.5;

[0103] c) Determine whether the EOC device 2 is operable or operating under stable operating conditions or under unstable operating conditions when operating the EOC device 2 based on the result value C;

[0104] d) If it is determined that the EOC device 2 is operating under unstable operating conditions when operating the EOC device 2 based on the result value C, repeat steps b)-c) for the type 1 parameter, and use the result value C as the new second value B, or

[0105] If it is determined that the EOC device 2 operates under stable operating conditions when operating the EOC device 2 based on the result value C, steps b)-c) are repeated for the type 1 parameter, and the result value C is taken as the new first value A.

[0106] Alternatively, if it is determined that the EOC device 2 operates under unstable operating conditions when operating the EOC device 2 based on the result value C, steps b)-c) can be repeated for the type 2 parameter, and the result value C is taken as the new second value B.

[0107] Alternatively, if it is determined that the EOC device 2 operates under stable operating conditions when operating the EOC device 2 based on the result value C, steps b)-c) can be repeated for the type 2 parameter, and the result value C is taken as the new first value A.

[0108] According to an exemplary embodiment of the method, the first and second values are typically numerical values. Therefore, the first value is typically lower than the second value. Thus, the first value is typically the lower value (compared to the second value), and the second value is typically the higher value (compared to the first value).

[0109] According to an exemplary embodiment of the method, when it is determined that the EOC device 2 emits (or will emit) an undesirable, in particular audible, noise artifact, an unstable operating condition when operating the EOC device 2 based on the result value is given. In other words, the determination of the emission of an undesirable, in particular audible, noise artifact can indicate an unstable operating condition of the EOC device 2.

[0110] According to an exemplary embodiment of the method, the above steps a) to c) of the tuning rule can be repeated until a specific stop condition is met. Thus, when the stop condition is met, the implementation of steps a) to e) of the tuning rule is at least temporarily stopped.

[0111] According to an exemplary embodiment of the method, the above steps a) to c) of the tuning rule can be repeated until a specific stop condition is met. Thus, when the stop condition is met, the implementation of steps a) to e) of the tuning rule is at least temporarily stopped.

[0112] According to an exemplary embodiment of the method, a stop condition can be satisfied when the difference between the finally determined second value B and the first value A exceeds or falls below a predefined reference value. Thus, a third processing rule, in particular a calculation rule, can be applied to the first value A and the second value B. According to the third processing rule, the first value A is subtracted from the second value B, thereby obtaining the difference between the finally determined first value A and the second value B; and a comparison rule is applied to the obtained difference, and the obtained difference is compared with the predefined reference value, thereby determining whether the difference between the finally determined second value B and the first value A is lower than the predefined reference value. Similarly, the corresponding reference value can be determined by a tuning experiment or based on the technical specifications of the EOC device 2 (such as a predefined reference value). The corresponding reference value can also be a static or dynamic numerical value, that is, fixed, or for example depending on the operating state of the engine 5.

[0113] According to an exemplary embodiment of the method, a stop condition can be satisfied when the operating state of the engine 5 changes or is changed. For example, when the load of the engine 5 changes, the operating state of the engine 5 may change.

[0114] If the operating state of the engine 5 changes, the finally obtained values of A, B, and C can be stored in a storage device. The finally obtained values of A, B, and C can in particular be stored at a specific location corresponding to the operating state of the engine. If, in the new operating state of the engine 5, before the stop condition is satisfied, steps a) to e) can be continued in this operating state.

[0115] According to an exemplary embodiment of the method, the corresponding result value C assigned as a type 1 parameter to the corresponding first value A or as a type 2 parameter to the corresponding second value B, as described in steps a)-d), ensures the stable state of the EOC device 2.

[0116] According to an exemplary embodiment of the method, a predefined offset value can be applied. For example, for a type 1 parameter, a predefined offset value can be subtracted from the corresponding result value, and the offset value is determined by the corresponding first value. For a type 2 parameter, the corresponding predefined offset value can be added to the corresponding result value, and the offset value is determined by the corresponding second value. By applying the corresponding predefined offset value to the corresponding result value, the offset value is determined by the corresponding difference between the second and the first value, and the offset value is lower than the predefined reference value. Since the application of the offset value allows a predefined "safety zone" to be created around the corresponding result value, the operating safety of tuning the EOC device 2 can be improved. The corresponding offset value can also be a static (numerical) value or a dynamic (numerical) value, for example depending on the operating state of the engine.

[0117] According to an exemplary embodiment of the method, the first value may be the last determined value for determining the stable operation of the EOC device, and the second value of the repeating step may be the last determined value for determining the unstable operation of the EOC device 2. This is particularly applicable to type 1 parameters. For type 2 parameters, the second value may be the last determined value for determining the stable operation of the EOC device, and the first value of the repeating step may be the last determined value for determining the unstable operation of the EOC device 2.

[0118] Therefore, for type 1 parameters, the first value may be regarded as or represented as a first threshold value. Below the first threshold value, especially for a given operating state of the engine and / or a given sound channel of the EOC device and / or a given harmonic order, the stable operation of the EOC device is determined or possible, and the second value may be regarded as or represented as a second threshold value. Below the second threshold value, especially for a given operating state of the engine and / or a given sound channel and / or a given harmonic order of the EOC device 2, the unstable operation of the EOC device 2 is determined. For type 2 parameters, the first value may be regarded as or represented as a first threshold value. Below the first threshold value, especially for a given operating state of the engine and / or a given sound channel of the EOC device 2 and / or a given harmonic order, the unstable operation of the EOC device 2 is determined or possible, and the second value may be regarded as or represented as a second threshold value. Below the second threshold value, especially for a given operating state of the engine and / or a given sound channel and / or a given harmonic order of the EOC device 2, the stable operation of the EOC device 2 is determined. Therefore, the defined tuning rule can use the corresponding stability value (first value) or instability value (second value) to tune at least one operating parameter of the EOC device 2.

[0119] According to an exemplary embodiment of the method, zero may be used as the initial first value. Using zero as the initial first value can effectively initialize the method.

[0120] According to an exemplary embodiment of the method, the tuning rules can be applied to a plurality of defined operating states of the engine 5 to which the EOC device 2 can be assigned or is assigned, wherein at least one operating parameter of the EOC device 2 is to be tuned, in particular in a plurality of defined load states of the engine to which the EOC device 2 to be tuned can be assigned or is assigned, and / or the tuning rules are used for a plurality of sound channels of the EOC device 2. Thus, the above steps a)-e) of the corresponding tuning rules apply to a plurality of defined operating states of the engine 5 to which the EOC device 2 can be assigned or is assigned, wherein at least one operating parameter of the EOC device 2 is to be tuned, in particular in a plurality of defined load states of the engine to which the EOC device 2 to be tuned can be assigned or is assigned, and / or for a plurality of sound channels of the EOC device 2. The respective operating states can be defined by different engine speeds (engine revolutions), engine torques, engine loads, etc. Thus, an integrated tuning of the corresponding operating parameters of the EOC device 2 is feasible, since the respective operating parameters of the EOC device 2 are tuned for different operating states of the corresponding engine 5 and / or for a plurality of sound channels of the EOC device 2 and / or for a plurality of engine harmonics of the engine 5.

[0121] According to an exemplary embodiment of the method, the tuning rules are applied to each sound channel of the EOC device 2. Thus, the above steps a)-e) can be performed for each sound channel of the EOC device 2. Thus, an integrated tuning of the respective parameters of the EOC device 2 is feasible, since the respective parameters of the EOC device 2 are tuned for each sound channel of the EOC device 2.

[0122] According to an exemplary embodiment of the method, the tuning rules are applied to each engine harmonic to be eliminated by the EOC device 2. Thus, the above steps a)-e) can be applied to each engine harmonic to be eliminated by the EOC device 2. Thus, a comprehensive tuning of the respective operating parameters of the EOC device 2 is feasible, since the respective operating parameters of the EOC device 2 are tuned for each engine harmonic to be eliminated by the EOC device 2.

[0123] According to an exemplary embodiment of the method, the tuning rules can be applied to at least two different engine harmonics that will be simultaneously eliminated by the EOC device 2. Thus, the above steps a)-e) can be performed for at least two different engine harmonics that will be simultaneously eliminated by the EOC device 2. By simultaneously applying the tuning rules and the corresponding steps a)-e) to at least two different engine harmonics to be eliminated by the EOC device 2, the efficiency of the method can be increased, since the tuning can be completed for at least two different engine harmonics to be simultaneously eliminated by the EOC device 2.

[0124] According to an exemplary embodiment of the method, tuning rules can be applied when driving a vehicle 1 including an engine 5 to which an EOC device 2 is assignable or assigned, where at least one operating parameter of the EOC device 2 is to be tuned. Thus, when driving a vehicle 1 including an engine 5 to which an EOC device 2 is assignable or assigned, the above steps a)-e) can be performed, where at least one operating parameter of the EOC device 2 is to be tuned. Thus, tuning can be completed when operating a vehicle 1 including an engine 5 to which an EOC device 2 is assignable or assigned, where at least one operating parameter of the EOC device 2 is to be tuned, which ignores the requirements of a specific tuning infrastructure and allows on-site tuning of the operating parameters of the EOC device 2. In addition, during the "service life" of the EOC device 2, tuning can be performed multiple times. Thus, the aging of the EOC device 2, such as aging caused by aging effects, such as the undesired oscillation of an acoustic signal emitting device 8 (such as a speaker device) at a specific frequency, can be made negligible by respectively readjusting or retuning the corresponding operating parameters of the EOC device 2. Such readjustment or retuning can be applied respectively during the operation of the vehicle 1 or during subsequent tuning periods.

[0125] As described above, the forgetting factor is an example of a corresponding EOC. Thus, the operating parameter to be tuned may be the forgetting factor of the EOC device.

[0126] The control unit 10 can form part of a device 12 for automatically or autonomously tuning at least one operating parameter of the EOC device 2. Thus, the device 12 includes a control unit 10 configured to provide, in particular according to the method described herein, defined tuning rules for automatically or autonomously tuning at least one operating parameter of the EOC device 2, and based on the provided tuning rules, automatically or autonomously adjust at least one operating parameter of the EOC device 2. All the notes regarding the method also apply to the device and vice versa.

[0127] Figure 2 A schematic diagram of a device for automatically or autonomously tuning at least one operating parameter of an EOC device 2 according to an exemplary embodiment is shown.

[0128] According to an exemplary embodiment of the device 12, the control unit 10 can be configured to provide and / or implement tuning rules that include the following steps:

[0129] a) Select a first value and a second value within the value range of the operating parameter of the EOC device 2 to be tuned;

[0130] b) Apply a first processing rule, in particular a calculation rule, to the selected first and second values of the operating parameters of the EOC device 2, and sum the selected first and second values according to the first processing rule, thereby obtaining the sum of the selected first and second values;

[0131] c) Apply a second processing rule, in particular a calculation rule, to the sum of the selected first and second values, and divide the sum of the selected first and second values by a division factor according to the second processing rule, thereby obtaining a result value;

[0132] d) Determine whether the EOC device 2 can operate or is operating under stable operating conditions or under unstable operating conditions when operating the EOC device 2 based on the result value;

[0133] e) If it is determined that the EOC device 2 is operating under unstable operating conditions when operating the EOC device 2 based on the result value, repeat steps b)-e), and use the result value as the second value, or

[0134] If it is determined that the EOC device 2 is operating under stable operating conditions when operating the EOC device 2 based on the result value, repeat steps b)-e), and use the result value as the first value.

[0135] According to an exemplary embodiment of the device 12, the control unit 10 may be configured to provide and / or implement a tuning rule, and the tuning rule includes the following steps:

[0136] a) Select a first value and a second value. The first value may be represented as a value A within the value range of the operating parameter of the EOC device 2 to be tuned, and the second value may be represented as a value B. Thus, for the first type of tunable parameter ("type 1 parameter") of the EOC device, it is assumed that the first value A is the value when the EOC device is stable, and the second value B is the value when the EOC device is unstable; or thus, for the second type of tunable parameter ("type 2 parameter") of the EOC device 2, it is assumed that the first value A is the value when the EOC device 2 is unstable, and the second value B is the value when the EOC device 2 is stable; and it is assumed that the selected first value A and second value B satisfy the following condition: A < B;

[0137] b) Apply a first processing rule, in particular a calculation rule, to the selected first value A and second value B of the operating parameter of the EOC device 2. According to the first processing rule, use weights w1 and (1 - w1) to obtain an intermediate value C: C = w1 * A+(1 - w1) * B. The intermediate value C is the weighted sum of the selected first value A and second value B, where 0 < w1 < 1 is a static or dynamically selectable weight;

[0138] c) Determine whether the EOC device 2 can operate or is operating under stable operating conditions or under unstable operating conditions when operating the EOC device 2 based on the result value C;

[0139] d) If it is determined that the EOC device 2 is operating under unstable operating conditions when operating the EOC device 2 based on the result value C, then steps b)-c) are repeated for the type 1 parameter, and the result value C is used as the new second value B, or

[0140] If it is determined that the EOC device 2 is operating under stable operating conditions when operating the EOC device 2 based on the result value C, then steps b)-c) are repeated for the type 1 parameter, and the result value C is used as the new first value A.

[0141] According to an exemplary embodiment of the device 2, the control unit 10 may further include a selection unit 13 implemented as hardware and / or software for selecting a first value and a second value within a value range of specific operating parameters of the EOC device 2 to be tuned; and a processing unit 14, in particular a computing unit, implemented as hardware and / or software for applying a corresponding first processing rule, in particular a calculation rule, to the selected first and second values of the operating parameters of the EOC device 2 to obtain a result value; and a determination unit 15 implemented as hardware and / or software for determining whether the EOC device 2 can operate or is operating under stable operating conditions or under unstable operating conditions when operating the EOC device 2 based on the result value.

[0142] The following example shows how the corresponding operating parameters of the EOC device 2 apply an exemplary tuning rule to tune the step size (μ value).

[0143] The tuning rule may use μ L as the first value, and use μ R as the second value. μ L may refer to the (highest) found stable value of the EOC device 2, and μ R may refer to the (lowest) found unstable value of the EOC device 2.

[0144] Now, for a given engine speed (engine rotational speed) and engine torque of the engine 5, the tuning rule applies the following processing rule to determine the μ0 value that can be regarded as the result value:

[0145] (μ L +μ R ) / 2

[0146] In this processing rule, the division factor is 2.

[0147] If the μ0 value causes the EOC device 2 to operate stably, then in a further iteration of the above processing rule, the μ0 value is used as the new μ L . Otherwise, that is, if the μ0 value causes the EOC device 2 to operate unstably, then in a further iteration of the above processing rule, the μ0 value is used as the new μ R .

[0148] When the stop condition is satisfied, the processing rule can be stopped. When μ L - μ R < ε (where ε > 0 is the expected accuracy of the respective operating parameters of the EOC device), this situation may occur. ε can be regarded as a predefined reference value. Therefore, when the finally determined first value μ L and the second value μ R the difference between them exceeds or is lower than the predefined reference value ε, the stop condition can be satisfied.

[0149] In addition, an offset value σ can be applied to the last μ0 value. In particular, the offset value σ can be subtracted from the last μ0 value so that the final value μ 最终 = the last μ0 value - σ. Applying the corresponding offset value increases the operating stability of the EOC device 2.

Claims

1. A method for automatically or self - tuning at least one operating parameter of an engine order cancellation ("EOC") device (2), the EOC device (2) being capable of operating based on a plurality of operating parameters, comprising the following steps: Providing a defined tuning rule for automatically or self - tuning at least one operating parameter of the EOC device (2); Automatically or self - tuning the at least one operating parameter of the EOC device (2) based on the provided tuning rule; Wherein providing the tuning rule comprises the following steps: a) Selecting a first value and a second value within the value range of the operating parameter of the EOC device (2) to be tuned; b) Applying a first processing rule to the selected first and second values of the operating parameter of the EOC device (2), and summing the selected first and second values according to the first processing rule, thereby obtaining the sum of the selected first and second values; c) Applying a second processing rule to the sum of the selected first and second values, and dividing the sum of the selected first and second values by a division factor according to the second processing rule, thereby obtaining a result value; d) Determining whether the EOC device (2) can operate or is operating under stable operating conditions or under unstable operating conditions when operating the EOC device (2) based on the result value; e) If it is determined that the EOC device (2) is operating under unstable operating conditions when operating the EOC device (2) based on the result value, repeating steps b) - d) and using the result value as the second value, or If it is determined that the EOC device (2) is operating under stable operating conditions when operating the EOC device (2) based on the result value, repeating steps b) - d) and using the result value as the first value; Or wherein providing the tuning rule comprises the following steps: a) Selecting a first value and a second value, the first value being represented as value A within the value range of the operating parameter of the EOC device to be tuned, and the second value being represented as value B. Thus, for the first type of tunable parameters of the EOC device, it is assumed that the first value A is the value when the EOC device is stable, and the second value B is the value when the EOC device is unstable; or thus, for the second type of tunable parameters of the EOC device (2), it is assumed that the first value A is the value when the EOC device (2) is unstable, and the second value B is the value when the EOC device (2) is stable; and assuming that the selected first value A and second value B satisfy the following condition: A < B; b) Applying a first processing rule to the selected first value A and second value B of the operating parameter of the EOC device (2), and obtaining an intermediate value C according to the first processing rule: C = w1*A+(1 - w1)*B, the intermediate value C being the weighted sum of the selected first value A and second value B, where 0 < w1 < 1 is a static or dynamically selectable weight; c) Determine whether the EOC device (2) is operable or operating under stable operating conditions or under unstable operating conditions when operating the EOC device (2) based on the result value C; d) If it is determined that the EOC device (2) is operating under unstable operating conditions when operating the EOC device (2) based on the result value C, then repeat steps b)-c) for the first type of tunable parameters, and use the result value C as the new second value B, or If it is determined that the EOC device (2) is operating under stable operating conditions when operating the EOC device (2) based on the result value C, then repeat steps b)-c) for the first type of tunable parameters, and use the result value C as the new first value A.

2. The method according to claim 1, wherein the above steps a)-e) are repeated until a stop condition is met.

3. The method according to claim 2, wherein the stop condition is met when the engine (5) to which the EOC device (2) can be assigned or is assigned changes its operating state.

4. The method according to claim 2 or 3, wherein the stop condition is met when the difference between the last determined first and second values exceeds or is lower than a predefined reference value.

5. The method according to claim 4, wherein the result values assigned to each of the first and second values that exceed or are lower than the predefined reference value are defined as the tuned operating parameters.

6. The method according to claim 4, wherein a predefined offset value is applied to each of the result values determined according to each of the first and second values that exceed or are lower than the predefined reference value, whereby the value obtained by subtracting the predefined offset value from each of the result values determined according to each of the first and second values that exceed or are lower than the predefined reference value is defined as the tuned operating parameter.

7. The method according to claim 1, wherein the first value is the last determined value for determining the stable operation of the EOC device (2), and the second value for repeating the steps is the last determined value for determining the unstable operation of the EOC device (2).

8. The method according to claim 1, including using zero as the initial first value.

9. The method according to claim 1, wherein the tuning rule applies to a plurality of defined operating states of the engine (5) to which the EOC device (2) can be assigned or is assigned, and at least one operating parameter of the EOC device (2) is to be tuned under a plurality of defined load states of the engine (5) to which the EOC device (2) to be tuned can be assigned or is assigned.

10. The method according to claim 1, wherein the tuning rule applies to each sound channel of the EOC device (2).

11. The method according to claim 1, wherein the tuning rule applies to at least two different engine harmonics that will be eliminated by the EOC device (2) simultaneously.

12. The method according to claim 1, wherein the tuning rule applies to each engine harmonic to be eliminated by the EOC device (2).

13. The method according to claim 1, wherein the tuning rule is applied when driving a vehicle with an engine to which the EOC device (2) can be allocated or is allocated, and at least one operating parameter of the EOC device (2) is to be tuned.

14. The method according to claim 1, wherein the operating parameter to be tuned is the forgetting factor of the EOC device (2).

15. A device (12) for automatically or automatically tuning at least one operating parameter of an engine order cancellation ("EOC") device (2), the device comprising a control unit (10), the control unit (10) being configured to: Provide a defined tuning rule for automatically or automatically tuning at least one operating parameter of the EOC device (2); Automatically or automatically tune at least one operating parameter of the EOC device (2) based on the provided tuning rule; Wherein the control unit (10) is configured to provide and / or implement a tuning rule, the tuning rule comprising the following steps: a) Select a first value and a second value within the value range of the operating parameter of the EOC device (2) to be tuned; b) Apply a first processing rule to the selected first and second values of the operating parameter of the EOC device (2), and sum the selected first and second values according to the first processing rule, thereby obtaining the sum of the selected first and second values; c) Apply a second processing rule to the sum of the selected first and second values, and divide the sum of the selected first and second values by a division factor according to the second processing rule, thereby obtaining a result value; d) Determine whether the EOC device (2) can operate or is operating under stable operating conditions or under unstable operating conditions when operating the EOC device (2) based on the result value; e) If it is determined that the EOC device (2) is operating under unstable operating conditions when operating the EOC device (2) based on the result value, repeat steps b)-e), and use the result value as the second value, or If it is determined that the EOC device (2) is operating under stable operating conditions when operating the EOC device (2) based on the result value, repeat steps b)-e), and use the result value as the first value; Or the tuning rule comprises the following steps: a) Select a first value and a second value, the first value being represented as value A within the value range of the operating parameter of the EOC device to be tuned, and the second value being represented as value B. Thus, for the first type of tunable parameters of the EOC device, it is assumed that the first value A is the value when the EOC device is stable, and the second value B is the value when the EOC device is unstable; or thus, for the second type of tunable parameters of the EOC device (2), it is assumed that the first value A is the value when the EOC device (2) is unstable, and the second value B is the value when the EOC device (2) is stable; and it is assumed that the selected first value A and second value B satisfy the following condition: A < B; b) Apply a first processing rule to a selected first value A and a second value B of the operating parameters of the EOC device (2), according to which an intermediate value C is obtained using weights w1 and (1 - w1): C = w1 * A + (1 - w1) * B, where the intermediate value C is the weighted sum of the selected first value A and second value B, and 0 < w1 < 1 is a static or dynamically selectable weight; c) Determine whether the EOC device (2) is operable or operating under stable operating conditions or under unstable operating conditions when operating the EOC device (2) based on the result value C; d) If it is determined that the EOC device (2) is operating under unstable operating conditions when operating the EOC device (2) based on the result value C, then repeat steps b) - c) for the first type of tunable parameters and use the result value C as the new second value B, or If it is determined that the EOC device (2) is operating under stable operating conditions when operating the EOC device (2) based on the result value C, then repeat steps b) - c) for the first type of tunable parameters and use the result value C as the new first value A.

16. The device according to claim 15, wherein the control unit (10) further comprises: A selection unit (13) for selecting a first value and a second value within the value range of the operating parameters of the EOC device (2) to be tuned; A processing unit (14) for applying a first processing rule to the selected first value and second value of the operating parameters of the EOC device (2) to obtain a result value; and A determination unit for determining whether the EOC device (2) is operable or operating under stable operating conditions or under unstable operating conditions when operating the EOC device (2) based on the result value.

17. An EOC device (2) for a vehicle, the EOC device (2) comprising at least one device (12) according to any one of claims 15 - 16.

18. A vehicle (1) comprising the EOC device (2) according to claim 17.

19. A machine-readable medium (11) comprising machine-readable instructions which, when executed by a processor of a control unit (10) implemented as hardware and / or software of the EOC device (2), cause the EOC device (2) to perform the method according to any one of the preceding claims 1 - 14.

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