CN114718725B - Method and device for determining knocking frequency of engine - Google Patents
Method and device for determining knocking frequency of engine Download PDFInfo
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- CN114718725B CN114718725B CN202210434743.4A CN202210434743A CN114718725B CN 114718725 B CN114718725 B CN 114718725B CN 202210434743 A CN202210434743 A CN 202210434743A CN 114718725 B CN114718725 B CN 114718725B
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000005474 detonation Methods 0.000 claims abstract description 35
- 230000010354 integration Effects 0.000 claims description 22
- 238000009825 accumulation Methods 0.000 claims description 5
- 238000004590 computer program Methods 0.000 description 10
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- 238000002485 combustion reaction Methods 0.000 description 2
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
- G01L23/225—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines circuit arrangements therefor
- G01L23/227—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines circuit arrangements therefor using numerical analyses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Combustion & Propulsion (AREA)
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a method and a device for determining engine knocking frequency. The invention comprises the following steps: determining a plurality of detonation frequency points corresponding to the engine, wherein the detonation frequency points are a plurality of continuous frequency points of the engine under a detonation window, and each detonation frequency point corresponds to one detonation frequency; determining whether the working condition of the engine is a preset working condition; under the condition that the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points when the engine knocks; under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state of knocking; and determining a target knocking frequency corresponding to the engine according to the first knocking voltage integral values and the second knocking voltage integral values. The invention solves the problem that the working environment of the engine is complex in the related art, so that the knock signal acquisition work is difficult.
Description
Technical Field
The invention relates to the field of engines, in particular to a method and a device for determining knocking frequency of an engine.
Background
In the related art, a large-bore gas engine is operated at 1500 revolutions or 1800 revolutions only, and when knocking occurs, the combustion of the gasoline engine becomes abnormal. Knock recognition usually requires calibration of a knock window and a knock frequency, the knock window is relatively fixed, and only the frequency of knocking needs to be found because the calibration value of the knock window is usually fixed. Usually, the calibration of the knocking of the gas engine needs to acquire signals of a knocking sensor by means of a combustion analyzer or an oscilloscope, and the final knocking frequency is confirmed by analyzing the knocking signals.
In view of the above problems in the related art, no effective solution has been proposed at present.
Disclosure of Invention
The invention mainly aims to provide a method and a device for determining the knocking frequency of an engine, which are used for solving the problem that the knocking signal acquisition work is difficult due to the complex working environment of the engine in the related technology.
In order to achieve the above object, according to one aspect of the present invention, there is provided a method of determining a knocking frequency of an engine. The invention comprises the following steps: determining a plurality of detonation frequency points corresponding to the engine, wherein the detonation frequency points are a plurality of continuous frequency points of the engine under a detonation window, and each detonation frequency point corresponds to one detonation frequency; determining whether the working condition of the engine is a preset working condition, wherein the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed; under the condition that the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points when the engine knocks; under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state of knocking; and determining a target knocking frequency corresponding to the engine according to the first knocking voltage integral values and the second knocking voltage integral values.
Further, under the condition that the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points in a knock occurrence state of the engine, wherein the method comprises the following steps: determining a corresponding first calibration time period when the engine is in a knocking state; collecting a plurality of first knock voltage values corresponding to a plurality of time points of each knock frequency point in a first calibration time period; and accumulating the plurality of first knocking voltage values to obtain a first knocking voltage integral value corresponding to the knocking frequency point.
Further, under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points in a state that the engine does not knock, wherein the method comprises the following steps: determining a corresponding second calibration time period when the engine is in a state of knocking; collecting a plurality of second knock voltage values corresponding to a plurality of time points of each knock frequency point in a second calibration time period; and accumulating the plurality of second knock voltage values to obtain a second knock voltage integral value corresponding to the knock frequency point.
Further, determining a target knock frequency corresponding to the engine according to the plurality of first knock voltage integrated values and the plurality of second knock voltage integrated values, including: determining a first acquisition time in a first calibration time period; dividing the first knock voltage integral values by the first acquisition times in sequence to obtain a first knock voltage integral average value; determining a second acquisition time in a second calibration time period; dividing the plurality of second knock voltage integral values by the second acquisition times in sequence to obtain a plurality of second knock voltage integral average values; and determining a target knock frequency corresponding to the engine according to the first knock voltage integration average values and the second knock voltage integration average values.
Further, determining a target knock frequency corresponding to the engine according to the plurality of first knock voltage integration averages and the plurality of second knock voltage integration averages, including: acquiring a first knock voltage integral average value and a second knock voltage integral average value corresponding to each knock frequency point; calculating a difference value between the first knock voltage integral average value and the second knock voltage integral average value, and determining a difference value absolute value corresponding to the difference value to obtain a plurality of difference value absolute values corresponding to a plurality of knock frequency points; and determining the maximum value in the plurality of difference absolute values, and determining the knocking frequency corresponding to the knocking frequency point corresponding to the maximum value as the target knocking frequency.
Further, determining a plurality of knock frequency points corresponding to the engine includes: acquiring a plurality of knock signals acquired by a knock sensor; according to the knock signals, obtaining knock frequencies corresponding to the knock signals; a plurality of knock frequency points are determined from the plurality of knock frequencies.
In order to achieve the above object, according to another aspect of the present invention, there is provided a determination device of engine knock frequency. The device comprises: the first determining unit is used for determining a plurality of knocking frequency points corresponding to the engine, wherein the knocking frequency points are a plurality of continuous frequency points of the engine under a knocking window, and each knocking frequency point corresponds to one knocking frequency; the second determining unit is used for determining whether the working condition of the engine is a preset working condition, wherein the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed; the first acquisition unit is used for acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points when the engine knocks under the condition that the engine is in a preset working condition; the second acquisition unit is used for acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state of knocking without occurrence of the engine under a preset working condition; and the third determining unit is used for determining the target knocking frequency corresponding to the engine according to the first knocking voltage integrated values and the second knocking voltage integrated values.
Further, the first acquisition unit includes: a first determination subunit, configured to determine a corresponding first calibration period when the engine is in a state where knocking occurs; the first acquisition subunit is used for acquiring a plurality of first detonation voltage values corresponding to a plurality of time points of each detonation frequency point in a first calibration time period; and the first accumulation subunit is used for accumulating the plurality of first knocking voltage values to obtain a first knocking voltage integral value corresponding to the knocking frequency point.
In order to achieve the above object, according to another aspect of the present application, there is provided a computer-readable storage medium including a stored program, wherein the program performs a method of determining an engine knock frequency of any one of the above.
In order to achieve the above object, according to another aspect of the present application, there is provided a processor for executing a program, wherein the program performs a method of determining an engine knock frequency of any one of the above.
According to the invention, the following steps are adopted: determining a plurality of detonation frequency points corresponding to the engine, wherein the detonation frequency points are a plurality of continuous frequency points of the engine under a detonation window, and each detonation frequency point corresponds to one detonation frequency; determining whether the working condition of the engine is a preset working condition, wherein the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed; under the condition that the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points when the engine knocks; under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state of knocking; according to the first knock voltage integral values and the second knock voltage integral values, the target knock frequency corresponding to the engine is determined, the problem that in the related art, the engine working environment is complex, so that knock signal acquisition work is difficult is solved, and the effect of efficiently acquiring the knock signal is achieved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a flowchart I of a method for determining engine knock frequency according to an embodiment of the present invention;
FIG. 2 is a second flowchart of a method for determining engine knock frequency according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an engine knock frequency determining apparatus according to an embodiment of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the invention herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
According to an embodiment of the present invention, a method of determining a knock frequency of an engine is provided.
Fig. 1 is a flowchart one of a method of determining a knock frequency of an engine according to an embodiment of the present invention. As shown in fig. 1, the invention comprises the following steps:
step S101, determining a plurality of knocking frequency points corresponding to the engine, wherein the plurality of knocking frequency points are a plurality of continuous frequency points of the engine under a knocking window, and each knocking frequency point corresponds to one knocking frequency.
The knock window is a crank angle range after compression top dead center where knocking occurs, and it is determined that knocking occurs when the vibration intensity of the cylinder block of the engine is detected within the window to exceed the limit value. A plurality of consecutive frequency points of the engine under the knock window is determined.
Step S102, determining whether the working condition of the engine is a preset working condition, wherein the preset working condition is any one of the following working conditions: the torque of the engine is a preset torque, and the rotational speed of the engine is a preset rotational speed.
Above-mentioned ground, the operating mode of engine is the operating condition of engine under the condition that has direct relation with its action, and the preset moment of torsion, the preset rotational speed etc. in this application can carry out multiple numerical value setting to realize the change of the operating mode of engine.
Step S103, under the condition that the engine is in a preset working condition, a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points are obtained when the engine knocks.
In the above-mentioned manner, under the condition that the engine is in the working condition set according to the actual requirement, a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points of the engine in the knocking state are obtained.
Step S104, under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state of no knock.
Above-mentioned, under the condition that the engine is in the operating mode that this application was set according to actual demand, obtain a plurality of second knock voltage integral values that a plurality of knock frequency points correspond under the state that the engine was knocking.
Step S105, determining a target knock frequency corresponding to the engine according to the plurality of first knock voltage integrated values and the plurality of second knock voltage integrated values.
The target knock frequency corresponding to the engine is determined by the diagnostic apparatus based on the plurality of first knock voltage integrated values and the plurality of second knock voltage integrated values.
By the method, the steps of an oscilloscope and data acquired by combustion analysis are omitted, the knock sensor is directly connected to the electronic control unit, the voltage integral value recorded by the electronic control unit is uploaded to the diagnostic instrument, and the knock frequency is analyzed by the diagnostic instrument. According to the method and the device, based on the existing engine configuration, knocking signals are not collected through other equipment, and the knocking frequency can be screened out only through the electronic control unit connected with the knocking sensor, so that the knocking frequency calibration workload is reduced.
In an alternative example, when the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points in a state that the engine knocks, including: determining a corresponding first calibration time period when the engine is in a knocking state; collecting a plurality of first knock voltage values corresponding to a plurality of time points of each knock frequency point in a first calibration time period; and accumulating the plurality of first knocking voltage values to obtain a first knocking voltage integral value corresponding to the knocking frequency point.
In the above-mentioned manner, in a state in which the engine is in a knocking state, a plurality of first knock voltage values corresponding to a plurality of knock frequency points are measured by the diagnostic apparatus in a period of time, and the first knock voltage integral value is obtained by accumulating the plurality of first knock voltage values.
In an alternative example, when the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points in a state that the engine does not knock, where the method includes: determining a corresponding second calibration time period when the engine is in a state of knocking; collecting a plurality of second knock voltage values corresponding to a plurality of time points of each knock frequency point in a second calibration time period; and accumulating the plurality of second knock voltage values to obtain a second knock voltage integral value corresponding to the knock frequency point.
In the above-mentioned manner, in a state in which the engine is in a knocking state, a plurality of second knock voltage values corresponding to a plurality of knock frequency points are measured by the diagnostic apparatus in a period of time, and the second knock voltage integral value is obtained by accumulating the plurality of second knock voltage values.
In an alternative example, determining a target knock frequency corresponding to the engine from the plurality of first knock voltage integrated values and the plurality of second knock voltage integrated values includes: determining a first acquisition time in a first calibration time period; dividing the first knock voltage integral values by the first acquisition times in sequence to obtain a first knock voltage integral average value; determining a second acquisition time in a second calibration time period; dividing the plurality of second knock voltage integral values by the second acquisition times in sequence to obtain a plurality of second knock voltage integral average values; and determining a target knock frequency corresponding to the engine according to the first knock voltage integration average values and the second knock voltage integration average values.
The first collection times are times of the diagnostic instrument collecting the first knocking voltage of a single frequency point in a period of time, and the first knocking voltage integral average value is the first knocking voltage integral value divided by the first collection times. The second collection times are times of the diagnostic instrument collecting second knocking voltage of a single frequency point in a period of time, and the second knocking voltage integral average value is the second knocking voltage integral value divided by the second collection times.
In an alternative example, determining a target knock frequency for the engine based on the plurality of first knock voltage integral averages and the plurality of second knock voltage integral averages includes: acquiring a first knock voltage integral average value and a second knock voltage integral average value corresponding to each knock frequency point; calculating a difference value between the first knock voltage integral average value and the second knock voltage integral average value, and determining a difference value absolute value corresponding to the difference value to obtain a plurality of difference value absolute values corresponding to a plurality of knock frequency points; and determining the maximum value in the plurality of difference absolute values, and determining the knocking frequency corresponding to the knocking frequency point corresponding to the maximum value as the target knocking frequency.
Under the condition that the engine is in the same working condition, a first knock voltage integral average value and a second knock voltage integral average value corresponding to each knock frequency point are obtained, a target knock frequency is determined according to the absolute value of the difference between the first knock voltage integral average value and the second knock voltage integral average value, and the target knock frequency is the knock frequency corresponding to the knock frequency point corresponding to the maximum value in the absolute value of the difference.
In an alternative example, determining a plurality of knock frequency points for an engine includes: acquiring a plurality of knock signals acquired by a knock sensor; according to the knock signals, obtaining knock frequencies corresponding to the knock signals; a plurality of knock frequency points are determined from the plurality of knock frequencies.
Above-mentioned, confirm a plurality of knocking frequencies of correspondence according to the knock signal, and then obtain corresponding knocking frequency point, the knock signal is gathered through the knock sensor and is obtained.
In an optional embodiment provided in the application, as shown in fig. 2, fig. 2 is a flowchart of a method for determining a knocking frequency of an engine according to an embodiment of the present invention, a knocking window is calibrated according to the engine, knocking frequency points are set, the knocking frequency points can be sequentially ordered from small to large, under a preset working condition of the engine, knock integral voltage values corresponding to each frequency point when the engine does not knock and when the engine knocks are recorded respectively, the knock voltage integral value is averaged, the average value is stored in a diagnostic apparatus, a difference absolute value between average values in two sets of data is compared, a target knocking frequency is determined, and the target knocking frequency is a knocking frequency corresponding to a knocking frequency point corresponding to a maximum value in the difference absolute value.
The method for determining the knocking frequency of the engine comprises the steps of determining a plurality of knocking frequency points corresponding to the engine, wherein the knocking frequency points are a plurality of continuous frequency points of the engine under a knocking window, and each knocking frequency point corresponds to one knocking frequency; determining whether the working condition of the engine is a preset working condition, wherein the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed; under the condition that the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points when the engine knocks; under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state of knocking; according to the first knock voltage integral values and the second knock voltage integral values, the target knock frequency corresponding to the engine is determined, the problem that in the related art, the engine working environment is complex, so that knock signal acquisition work is difficult is solved, and the effect of efficiently acquiring the knock signal is achieved.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.
The embodiment of the invention also provides a device for determining the engine knocking frequency, and the device for determining the engine knocking frequency can be used for executing the method for determining the engine knocking frequency. The following describes a device for determining the knocking frequency of an engine according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of an engine knock frequency determining apparatus according to an embodiment of the present invention. As shown in fig. 3, the apparatus includes: a first determining unit 301, configured to determine a plurality of knock frequency points corresponding to an engine, where the plurality of knock frequency points are a plurality of continuous frequency points of the engine under a knock window, and each knock frequency point corresponds to one knock frequency; the second determining unit 302 is configured to determine whether the working condition of the engine is a preset working condition, where the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed; a first obtaining unit 303, configured to obtain a plurality of first knock voltage integrated values corresponding to a plurality of knock frequency points when the engine is in a state where knocking occurs, in a case where the engine is in a preset working condition; a second obtaining unit 304, configured to obtain a plurality of second knock voltage integrated values corresponding to a plurality of knock frequency points when the engine is in a state where knocking does not occur, in a case where the engine is in a preset working condition; the third determining unit 305 is configured to determine a target knock frequency corresponding to the engine according to the plurality of first knock voltage integrated values and the plurality of second knock voltage integrated values.
In an alternative example, the first obtaining unit 303 includes: a first determination subunit, configured to determine a corresponding first calibration period when the engine is in a state where knocking occurs; the first acquisition subunit is used for acquiring a plurality of first detonation voltage values corresponding to a plurality of time points of each detonation frequency point in a first calibration time period; and the first accumulation subunit is used for accumulating the plurality of first knocking voltage values to obtain a first knocking voltage integral value corresponding to the knocking frequency point.
In an alternative example, the second obtaining unit 304 includes: a second determination subunit, configured to determine a second calibration period corresponding to a state where knocking does not occur in the engine; the second acquisition subunit is used for acquiring a plurality of second detonation voltage values corresponding to a plurality of time points of each detonation frequency point in a second calibration time period; and the second accumulation subunit is used for accumulating the plurality of second knocking voltage values to obtain a second knocking voltage integral value corresponding to the knocking frequency point.
In an alternative example, the third determining unit 305 includes: the third determining subunit is used for determining the first acquisition times in the first calibration time period; the first division subunit is used for dividing the first knock voltage integral values by the first acquisition times in sequence to obtain a first knock voltage integral average value; a fourth determining subunit, configured to determine a second acquisition number in a second calibration period; the second division subunit is used for dividing the plurality of second knock voltage integral values by the second acquisition times in sequence to obtain a plurality of second knock voltage integral average values; and the fifth determination subunit is used for determining the target knocking frequency corresponding to the engine according to the first knocking voltage integration average values and the second knocking voltage integration average values.
In an alternative example, the fifth determining subunit includes: the acquisition module is used for acquiring a first knock voltage integral average value and a second knock voltage integral average value corresponding to each knock frequency point; the calculating module is used for calculating the difference value between the first knocking voltage integral average value and the second knocking voltage integral average value, determining the absolute value of the difference value corresponding to the difference value and obtaining a plurality of absolute values of the difference value corresponding to a plurality of knocking frequency points; and the determining module is used for determining the maximum value in the absolute values of the plurality of differences and determining the knocking frequency corresponding to the knocking frequency point corresponding to the maximum value as the target knocking frequency.
In an alternative example, the first determining unit 301 includes: the first acquisition subunit is used for acquiring a plurality of knock signals acquired by the knock sensor; the second acquisition subunit is used for acquiring a plurality of knocking frequencies corresponding to the plurality of knocking signals according to the plurality of knocking signals; a plurality of knock frequency points are determined from the plurality of knock frequencies.
The device for determining the knocking frequency of the engine provided by the embodiment of the invention is used for determining a plurality of knocking frequency points corresponding to the engine through a first determining unit 301, wherein the plurality of knocking frequency points are a plurality of continuous frequency points of the engine under a knocking window, and each knocking frequency point corresponds to one knocking frequency; the second determining unit 302 is configured to determine whether the working condition of the engine is a preset working condition, where the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed; a first obtaining unit 303, configured to obtain a plurality of first knock voltage integrated values corresponding to a plurality of knock frequency points when the engine is in a state where knocking occurs, in a case where the engine is in a preset working condition; a second obtaining unit 304, configured to obtain a plurality of second knock voltage integrated values corresponding to a plurality of knock frequency points when the engine is in a state where knocking does not occur, in a case where the engine is in a preset working condition; the third determining unit 305 is configured to determine, according to the plurality of first knock voltage integral values and the plurality of second knock voltage integral values, a target knock frequency corresponding to the engine, thereby solving the problem that in the related art, the working environment of the engine is complex, so that the knock signal collection is difficult, and further achieving the effect of efficiently collecting the knock signal.
The determining device of the engine knocking frequency includes a processor and a memory, the first determining unit 301 and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize the corresponding functions.
The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The inner core can be provided with one or more than one, and the problem that the working environment of the engine is complex in the related art, so that the knock signal acquisition is difficult is solved by adjusting the parameters of the inner core.
The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.
An embodiment of the present invention provides a computer-readable storage medium having stored thereon a program which, when executed by a processor, implements the method of determining a knocking frequency of an engine.
The embodiment of the invention provides a processor which is used for running a program, wherein the program runs to execute the method for determining the knocking frequency of the engine.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program stored in the memory and capable of running on the processor, wherein the processor realizes the following steps when executing the program: determining a plurality of detonation frequency points corresponding to the engine, wherein the detonation frequency points are a plurality of continuous frequency points of the engine under a detonation window, and each detonation frequency point corresponds to one detonation frequency; determining whether the working condition of the engine is a preset working condition, wherein the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed; under the condition that the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points when the engine knocks; under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state of knocking; and determining a target knocking frequency corresponding to the engine according to the first knocking voltage integral values and the second knocking voltage integral values.
Further, under the condition that the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points in a knock occurrence state of the engine, wherein the method comprises the following steps: determining a corresponding first calibration time period when the engine is in a knocking state; collecting a plurality of first knock voltage values corresponding to a plurality of time points of each knock frequency point in a first calibration time period; and accumulating the plurality of first knocking voltage values to obtain a first knocking voltage integral value corresponding to the knocking frequency point.
Further, under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points in a state that the engine does not knock, wherein the method comprises the following steps: determining a corresponding second calibration time period when the engine is in a state of knocking; collecting a plurality of second knock voltage values corresponding to a plurality of time points of each knock frequency point in a second calibration time period; and accumulating the plurality of second knock voltage values to obtain a second knock voltage integral value corresponding to the knock frequency point.
Further, determining a target knock frequency corresponding to the engine according to the plurality of first knock voltage integrated values and the plurality of second knock voltage integrated values, including: determining a first acquisition time in a first calibration time period; dividing the first knock voltage integral values by the first acquisition times in sequence to obtain a first knock voltage integral average value; determining a second acquisition time in a second calibration time period; dividing the plurality of second knock voltage integral values by the second acquisition times in sequence to obtain a plurality of second knock voltage integral average values; and determining a target knock frequency corresponding to the engine according to the first knock voltage integration average values and the second knock voltage integration average values.
Further, determining a target knock frequency corresponding to the engine according to the plurality of first knock voltage integration averages and the plurality of second knock voltage integration averages, including: acquiring a first knock voltage integral average value and a second knock voltage integral average value corresponding to each knock frequency point; calculating a difference value between the first knock voltage integral average value and the second knock voltage integral average value, and determining a difference value absolute value corresponding to the difference value to obtain a plurality of difference value absolute values corresponding to a plurality of knock frequency points; and determining the maximum value in the plurality of difference absolute values, and determining the knocking frequency corresponding to the knocking frequency point corresponding to the maximum value as the target knocking frequency.
Further, determining a plurality of knock frequency points corresponding to the engine includes: acquiring a plurality of knock signals acquired by a knock sensor; according to the knock signals, obtaining knock frequencies corresponding to the knock signals; a plurality of knock frequency points are determined from the plurality of knock frequencies.
The device herein may be a server, PC, PAD, cell phone, etc.
The invention also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with the method steps of: determining a plurality of detonation frequency points corresponding to the engine, wherein the detonation frequency points are a plurality of continuous frequency points of the engine under a detonation window, and each detonation frequency point corresponds to one detonation frequency; determining whether the working condition of the engine is a preset working condition, wherein the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed; under the condition that the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points when the engine knocks; under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state of knocking; and determining a target knocking frequency corresponding to the engine according to the first knocking voltage integral values and the second knocking voltage integral values.
Further, under the condition that the engine is in a preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points in a knock occurrence state of the engine, wherein the method comprises the following steps: determining a corresponding first calibration time period when the engine is in a knocking state; collecting a plurality of first knock voltage values corresponding to a plurality of time points of each knock frequency point in a first calibration time period; and accumulating the plurality of first knocking voltage values to obtain a first knocking voltage integral value corresponding to the knocking frequency point.
Further, under the condition that the engine is in a preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points in a state that the engine does not knock, wherein the method comprises the following steps: determining a corresponding second calibration time period when the engine is in a state of knocking; collecting a plurality of second knock voltage values corresponding to a plurality of time points of each knock frequency point in a second calibration time period; and accumulating the plurality of second knock voltage values to obtain a second knock voltage integral value corresponding to the knock frequency point.
Further, determining a target knock frequency corresponding to the engine according to the plurality of first knock voltage integrated values and the plurality of second knock voltage integrated values, including: determining a first acquisition time in a first calibration time period; dividing the first knock voltage integral values by the first acquisition times in sequence to obtain a first knock voltage integral average value; determining a second acquisition time in a second calibration time period; dividing the plurality of second knock voltage integral values by the second acquisition times in sequence to obtain a plurality of second knock voltage integral average values; and determining a target knock frequency corresponding to the engine according to the first knock voltage integration average values and the second knock voltage integration average values.
Further, determining a target knock frequency corresponding to the engine according to the plurality of first knock voltage integration averages and the plurality of second knock voltage integration averages, including: acquiring a first knock voltage integral average value and a second knock voltage integral average value corresponding to each knock frequency point; calculating a difference value between the first knock voltage integral average value and the second knock voltage integral average value, and determining a difference value absolute value corresponding to the difference value to obtain a plurality of difference value absolute values corresponding to a plurality of knock frequency points; and determining the maximum value in the plurality of difference absolute values, and determining the knocking frequency corresponding to the knocking frequency point corresponding to the maximum value as the target knocking frequency.
Further, determining a plurality of knock frequency points corresponding to the engine includes: acquiring a plurality of knock signals acquired by a knock sensor; according to the knock signals, obtaining knock frequencies corresponding to the knock signals; a plurality of knock frequency points are determined from the plurality of knock frequencies.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Disks (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by the computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The foregoing is merely exemplary of the present invention and is not intended to limit the present invention. Various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are to be included in the scope of the claims of the present invention.
Claims (5)
1. A method of determining a knocking frequency of an engine, comprising:
determining a plurality of knocking frequency points corresponding to an engine, wherein the knocking frequency points are a plurality of continuous frequency points of the engine under a knocking window, and each knocking frequency point corresponds to one knocking frequency;
determining whether the working condition of the engine is a preset working condition, wherein the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed;
acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a knock state under the preset working condition;
acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state of no knock under the preset working condition;
determining a target knock frequency corresponding to the engine according to the first knock voltage integral values and the second knock voltage integral values;
under the condition that the engine is in the preset working condition, acquiring a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points under the condition that the engine knocks, wherein the method comprises the following steps: determining a corresponding first calibration period of time when the engine is in the knocking occurrence state; collecting a plurality of first knock voltage values corresponding to a plurality of time points of each knock frequency point in the first calibration time period; accumulating the plurality of first knocking voltage values to obtain the first knocking voltage integral value corresponding to the knocking frequency point;
Under the condition that the engine is in the preset working condition, acquiring a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points under the condition that the engine does not knock, wherein the method comprises the following steps: determining a corresponding second calibration period of time when the engine is in the knock-free state; collecting a plurality of second knock voltage values corresponding to a plurality of time points of each knock frequency point in the second calibration time period; accumulating the plurality of second knocking voltage values to obtain a second knocking voltage integral value corresponding to the knocking frequency point;
determining a target knock frequency corresponding to the engine according to the plurality of first knock voltage integrated values and the plurality of second knock voltage integrated values, including: determining a first acquisition time in the first calibration time period; dividing the first knock voltage integral values by the first acquisition times in sequence to obtain a first knock voltage integral average value; determining a second acquisition time in the second calibration time period; dividing the second knock voltage integral values by the second acquisition times in sequence to obtain a second knock voltage integral average value; determining the target knock frequency corresponding to the engine according to the first knock voltage integration average values and the second knock voltage integration average values;
Determining the target knock frequency corresponding to the engine according to the plurality of first knock voltage integration averages and the plurality of second knock voltage integration averages, including: acquiring the first knock voltage integral average value and the second knock voltage integral average value corresponding to each knock frequency point; calculating a difference value between the first knock voltage integral average value and the second knock voltage integral average value, and determining a difference value absolute value corresponding to the difference value to obtain a plurality of difference value absolute values corresponding to a plurality of knock frequency points; and determining the maximum value in the plurality of difference absolute values, and determining the knocking frequency corresponding to the knocking frequency point corresponding to the maximum value as the target knocking frequency.
2. The method of claim 1, wherein determining a corresponding plurality of knock frequency points for the engine comprises:
acquiring a plurality of knock signals acquired by a knock sensor;
according to the knock signals, obtaining knock frequencies corresponding to the knock signals;
and determining a plurality of knocking frequency points according to the plurality of knocking frequencies.
3. An engine knock frequency determining apparatus, comprising:
The first determining unit is used for determining a plurality of knocking frequency points corresponding to the engine, wherein the knocking frequency points are a plurality of continuous frequency points of the engine under a knocking window, and each knocking frequency point corresponds to one knocking frequency;
the second determining unit is used for determining whether the working condition of the engine is a preset working condition, wherein the preset working condition is any one of the following working conditions: the torque of the engine is preset torque, and the rotating speed of the engine is preset rotating speed;
a first obtaining unit, configured to obtain a plurality of first knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in a state where knocking occurs, in a case where the engine is in the preset working condition;
a second obtaining unit, configured to obtain a plurality of second knock voltage integral values corresponding to a plurality of knock frequency points when the engine is in the state that knocking does not occur in the engine under the preset working condition;
a third determining unit configured to determine a target knock frequency corresponding to the engine according to a plurality of the first knock voltage integrated values and a plurality of the second knock voltage integrated values;
The first acquisition unit includes: a first determination subunit, configured to determine a first calibration period corresponding to the engine in the knocking occurrence state; the first acquisition subunit is used for acquiring a plurality of first detonation voltage values corresponding to a plurality of time points of each detonation frequency point in the first calibration time period; the first accumulation subunit is used for accumulating the plurality of first knocking voltage values to obtain the first knocking voltage integral value corresponding to the knocking frequency point; a second acquisition unit including: a second determination subunit configured to determine a second calibration period corresponding to the engine in the state where knocking does not occur; the second acquisition subunit is used for acquiring a plurality of second detonation voltage values corresponding to a plurality of time points of each detonation frequency point in the second calibration time period; the second accumulation subunit is used for accumulating the plurality of second knocking voltage values to obtain a second knocking voltage integral value corresponding to the knocking frequency point;
a third determination unit including: a third determining subunit, configured to determine a first number of acquisitions in the first calibration period; the first division subunit is used for dividing the plurality of first knock voltage integral values by the first acquisition times in sequence to obtain a plurality of first knock voltage integral average values; a fourth determining subunit, configured to determine a second acquisition number in the second calibration period; the second division subunit is used for dividing the plurality of second knock voltage integral values by the second acquisition times in sequence to obtain a plurality of second knock voltage integral average values; a fifth determining subunit, configured to determine the target knock frequency corresponding to the engine according to a plurality of the first knock voltage integration averages and a plurality of the second knock voltage integration averages;
A fifth determination subunit comprising: the acquisition module is used for acquiring the first knocking voltage integral average value and the second knocking voltage integral average value corresponding to each knocking frequency point; the calculating module is used for calculating the difference value between the first knocking voltage integral average value and the second knocking voltage integral average value, determining the absolute value of the difference value corresponding to the difference value and obtaining a plurality of absolute values of the difference value corresponding to a plurality of knocking frequency points; and the determining module is used for determining the maximum value in the absolute values of the differences and determining the knocking frequency corresponding to the knocking frequency point corresponding to the maximum value as the target knocking frequency.
4. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein the program, when run, controls a device in which the computer-readable storage medium is located to execute a method of determining a knocking frequency of an engine according to claim 1 or 2.
5. A processor for running a program, wherein the program when run performs a method of determining the knock frequency of an engine as claimed in claim 1 or 2.
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| CN202210434743.4A CN114718725B (en) | 2022-04-24 | 2022-04-24 | Method and device for determining knocking frequency of engine |
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| CN202210434743.4A CN114718725B (en) | 2022-04-24 | 2022-04-24 | Method and device for determining knocking frequency of engine |
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| CN114718725B true CN114718725B (en) | 2023-06-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH04244933A (en) * | 1991-01-31 | 1992-09-01 | Fuji Heavy Ind Ltd | Device for detecting knocking of engine |
| JP2006348764A (en) * | 2005-06-13 | 2006-12-28 | Toyota Motor Corp | Knocking determination device for internal combustion engine |
| JP4452660B2 (en) * | 2005-06-28 | 2010-04-21 | トヨタ自動車株式会社 | Knocking state determination device |
| JP5839972B2 (en) * | 2011-12-12 | 2016-01-06 | 三菱電機株式会社 | Control device for internal combustion engine |
| CN111120095B (en) * | 2019-12-25 | 2020-12-22 | 潍柴动力股份有限公司 | Method and system for recognizing natural gas engine knocking |
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