CN115234422A - Method, device and system for confirming ignition advance angle - Google Patents
Method, device and system for confirming ignition advance angle Download PDFInfo
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- CN115234422A CN115234422A CN202210726817.1A CN202210726817A CN115234422A CN 115234422 A CN115234422 A CN 115234422A CN 202210726817 A CN202210726817 A CN 202210726817A CN 115234422 A CN115234422 A CN 115234422A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P5/00—Advancing or retarding ignition; Control therefor
- F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
- F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
- F02P5/15—Digital data processing
- F02P5/152—Digital data processing dependent on pinking
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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
Abstract
The invention relates to the technical field of engines, in particular to a method, a device and a system for confirming an ignition advance angle, wherein the method for confirming the ignition advance angle comprises the following steps: acquiring a preset value V1 of detonation voltage at the minimum detonation index of the engine and a preset value V2 of detonation voltage at the maximum detonation index of the engine; selecting a plurality of knock indexes based on the minimum knock index and the maximum knock index; acquiring a plurality of knock voltage variances; calculating a knock voltage preset value variance; and acquiring a knock voltage actual value and a knock voltage actual value variance of the engine, and confirming the ignition advance angle according to the relation between the knock voltage actual value and the knock voltage preset values V1 and V2 and the relation between the knock voltage actual value variance and the knock voltage preset value variance. According to the method, the device and the system for confirming the ignition advance angle, the problem of how to confirm the optimal ignition advance angle so as to enable the engine to achieve the optimal combustion efficiency is well solved.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a method, a device and a system for confirming an ignition advance angle.
Background
This section provides background information related to the present disclosure only and is not necessarily prior art.
Optimizing the control parameters of the engine in an effort to operate in an optimal state is an important aspect of engine control. For a high power engine, operating at the slight knock margin can ensure that it achieves optimal economy.
In the existing engine control, a knock sensor mainly collects a knock signal and is mainly used for avoiding excessive knocking to cause damage to a gas engine, and the control method of the existing engine control is to find that when the knock signal exceeds a limit value, an ignition advance angle is pushed and recalled to ensure that the gas engine is far away from a knocking state, so that the economy of the engine cannot be optimally controlled, and therefore the optimal ignition advance angle is confirmed to enable the engine to achieve the optimal combustion efficiency and improve the economy, and the problem that needs to be solved urgently is solved.
Supplementary notes: before the flame of normal ignition is not reached, the combustion tail end is spontaneously ignited, and forms a deflagration state with the flame of normal ignition, and the detonation is also called deflagration and is an abnormal combustion phenomenon, so that the fuel economy can be improved by weak detonation, but the engine is easily damaged by long-time detonation. The ignition advance angle is the most direct and effective means for controlling engine knocking, generally, the larger the ignition advance angle is, the more knocking is easy to occur or the knocking is strong, the better the engine economy is at the moment, and the smaller the ignition advance angle is, the less knocking is easy to occur or the knocking is weak, and the worse the engine economy is at the moment.
Disclosure of Invention
The object of the present invention is to solve at least the problem of how to identify the optimum advance angle for the engine to achieve optimum combustion efficiency. The purpose is realized by the following technical scheme:
a first aspect of the present invention provides a method for confirming an advance angle of ignition, including:
acquiring a preset detonation voltage value V1 when the engine reaches the minimum detonation index of slight detonation and a preset detonation voltage value V2 when the engine reaches the maximum detonation index of slight detonation;
selecting a plurality of knock indexes based on the minimum knock index and the maximum knock index;
obtaining a plurality of knock voltage variances corresponding to the plurality of knock indexes;
calculating the average value of the plurality of knock voltage variances to obtain a knock voltage preset value variance;
and acquiring a detonation voltage actual value and a detonation voltage actual value variance of the engine under an actual operation condition, and confirming the ignition advance angle of the engine according to the relation between the detonation voltage actual value and the detonation voltage preset value V1 and the detonation voltage preset value V2 and the relation between the detonation voltage actual value variance and the detonation voltage preset value variance.
According to the method for confirming the ignition advance angle, a stable detonation operation boundary is determined by utilizing a preset detonation voltage value V1 and a preset detonation voltage value V2, meanwhile, a preset detonation voltage value variance is obtained to serve as a stable detonation operation line, an actual detonation voltage value and an actual detonation voltage value variance obtained by testing of an engine to be tested are respectively compared with the stable detonation operation boundary and the stable detonation operation line, the ignition advance angle is adjusted according to a comparison result, and finally the engine is controlled at the stable detonation operation boundary and can stably operate; the problem of how to determine the optimal ignition advance angle so as to enable the engine to achieve the optimal combustion efficiency is well solved.
In addition, the method for confirming the ignition advance angle according to the invention can also have the following additional technical characteristics:
in some embodiments of the present invention, the step of confirming the ignition advance angle of the engine according to the relationship between the knock voltage actual value and the knock voltage preset value V1 and the knock voltage preset value V2 and the relationship between the knock voltage actual value variance and the knock voltage preset value variance comprises:
acquiring a knock voltage actual value variance based on the fact that the knock voltage actual value is larger than the knock voltage preset value V1 and smaller than the knock voltage preset value V2;
and based on the fact that the variance of the actual value of the knock voltage is smaller than the variance of the preset value of the knock voltage, the ignition advance angle meets the requirement.
In some embodiments of the present invention, the step of obtaining a plurality of knock voltage variances corresponding to the plurality of knock indices comprises:
respectively acquiring a plurality of groups of corresponding knock voltage preset values based on the minimum knock index, the maximum knock index and the plurality of knock indexes and based on the same time interval of engine operation;
and acquiring the corresponding plurality of knock voltage variances based on the plurality of groups of knock voltage preset values.
In some embodiments of the present invention, the step of obtaining the knock voltage actual value and the knock voltage actual value variance of the engine in the actual operation condition comprises:
the method comprises the steps that a plurality of working cycles are operated based on the fact that an engine is in an actual operation working condition, and a plurality of detonation voltage values of the engine are obtained respectively;
a knock voltage actual value is obtained based on an average value of the plurality of knock voltage values.
In some embodiments of the present invention, the step of obtaining the variance of the actual knock voltage value based on the fact that the actual knock voltage value is greater than the preset knock voltage value V1 and less than the preset knock voltage value V2 further comprises:
and acquiring the knock voltage actual value variance based on the knock voltage actual value being greater than the knock voltage preset value V1 and less than the knock voltage preset value V2 and based on the plurality of knock voltage values of the engine.
In some embodiments of the present invention, the step of obtaining a variance of an actual value of knock voltage based on the actual value of knock voltage being greater than the preset value V1 of knock voltage and less than the preset value V2 of knock voltage further includes:
and based on the fact that the actual value of the detonation voltage is smaller than the preset value V1 of the detonation voltage, increasing an ignition advance angle until the actual value of the detonation voltage is larger than the preset value V1 of the detonation voltage and smaller than the preset value V2 of the detonation voltage, and obtaining the variance of the actual value of the detonation voltage.
In some embodiments of the present invention, the step of obtaining a variance of an actual value of knock voltage based on the actual value of knock voltage being greater than the preset value V1 of knock voltage and less than the preset value V2 of knock voltage further includes:
and based on the fact that the actual value of the detonation voltage is larger than the preset value V2 of the detonation voltage, reducing the ignition advance angle until the actual value of the detonation voltage is larger than the preset value V1 of the detonation voltage and smaller than the preset value V2 of the detonation voltage, and obtaining the variance of the actual value of the detonation voltage.
In some embodiments of the present invention, in the step of meeting the requirement based on that the variance of the actual value of the knock voltage is smaller than the variance of the preset value of the knock voltage, the method further comprises:
and reducing the ignition advance angle until the variance of the actual value of the knock voltage is smaller than the variance of the preset value of the knock voltage based on the fact that the variance of the actual value of the knock voltage is larger than the variance of the preset value of the knock voltage, wherein the ignition advance angle meets the requirement.
The second aspect of the present invention also provides an apparatus for confirming a spark advance angle, the apparatus being configured to perform the method for confirming a spark advance angle as claimed in the above claim, comprising:
the device comprises an acquisition unit, a control unit, a calculation unit and a comparison unit;
the acquisition unit is used for acquiring an engine detonation signal and acquiring a detonation voltage preset value V1 and a detonation voltage preset value V2;
the control unit is used for storing a preset detonation voltage value V1, a preset detonation voltage value V2 and a preset detonation voltage value variance;
the calculation unit is used for calculating the average value of the plurality of knock voltage variances;
the comparison unit is used for comparing the actual value of the detonation voltage with the preset value V1 of the detonation voltage, the actual value of the detonation voltage with the preset value V2 of the detonation voltage, and the variance of the actual value of the detonation voltage and the variance of the preset value of the detonation voltage.
The device for confirming the ignition advance angle according to the embodiment of the invention has the same advantages as the method for confirming the ignition advance angle, and the detailed description is omitted here.
The third aspect of the present invention also provides a system for confirming a timing advance, which includes the apparatus for confirming a timing advance as described in the above claims, and further includes a memory, and a program in the memory stores the method for confirming a timing advance as described in the above claims.
The system for confirming the ignition advance angle according to the embodiment of the invention has the same advantages as the method for confirming the ignition advance angle, and the detailed description is omitted here.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like parts are designated with like reference numerals throughout the drawings. In the drawings:
fig. 1 schematically shows a flow chart of a method of confirming a spark advance angle according to a first embodiment of the present invention;
fig. 2 schematically shows a flow chart of a method for confirming a spark advance angle according to a second embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless specifically identified as an order of performance. It should also be understood that additional or alternative steps may be used.
Although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms may be only used to distinguish one element, component, region, layer or section from another region, layer or section. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the example embodiments.
For convenience of description, spatially relative terms, such as "inner", "outer", "lower", "below", "upper", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "at 8230; \8230; below" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Referring to fig. 1, a first aspect of the present invention provides a method for confirming an advance angle of ignition, including:
acquiring a preset detonation voltage value V1 when the engine reaches the minimum detonation index of slight detonation and a preset detonation voltage value V2 when the engine reaches the maximum detonation index of slight detonation;
selecting a plurality of knock indexes based on the minimum knock index and the maximum knock index;
obtaining a plurality of knock voltage variances corresponding to the plurality of knock indexes;
calculating the average value of the plurality of knock voltage variances to obtain a knock voltage preset value variance;
and acquiring a detonation voltage actual value and a detonation voltage actual value variance of the engine under an actual operating condition, and determining the ignition advance angle of the engine according to the relation between the detonation voltage actual value and the detonation voltage preset values V1 and V2 and the relation between the detonation voltage actual value variance and the detonation voltage preset value variance.
According to the method for confirming the ignition advance angle, the detonation stable operation boundary is determined by utilizing the detonation voltage preset value V1 and the detonation voltage preset value V2, meanwhile, the detonation voltage preset value variance is obtained and used as the detonation stable operation line, the actual detonation voltage value and the actual detonation voltage value variance obtained by the test of the engine to be tested are respectively compared with the detonation stable operation boundary and the detonation stable operation line, the ignition advance angle is adjusted according to the comparison result, and finally the engine is controlled at the detonation stable operation boundary and can stably operate; the problem of how to determine the optimal ignition advance angle so as to enable the engine to achieve the optimal combustion efficiency is well solved.
More specifically, in some embodiments of the present invention, the step of confirming the ignition advance angle of the engine according to the relationship between the knock voltage actual value and the knock voltage preset values V1 and V2 and the relationship between the knock voltage actual value variance and the knock voltage preset value variance comprises: acquiring a knock voltage actual value variance based on the fact that the knock voltage actual value is larger than the knock voltage preset value V1 and smaller than the knock voltage preset value V2; and based on the fact that the variance of the actual value of the knock voltage is smaller than the variance of the preset value of the knock voltage, the ignition advance angle meets the requirement. That is, as long as the above requirements are satisfied, it is indicated that the ignition advance angle is satisfactory.
Specifically, in conventional high-power engine control, it is often adopted to detect the knock voltage value and set a preset knock voltage value as a limit, and when the limit is exceeded, the ignition advance angle is reduced to avoid the engine running to the knock region.
In some embodiments of the invention, the engine can define a light knock stable operation boundary by using a combustion analyzer, wherein the light knock stable operation boundary is a boundary with light knock but not strong, and is generally determined subjectively by a detection worker, so that the fuel economy of the engine is better, and the engine is not easy to damage; correspondingly reading a preset detonation voltage value of a detonation sensor by selecting two different detonation indexes of a combustion analyzer, more specifically, obtaining a preset detonation voltage value V1 when the detonation index of the combustion analyzer is a% (minimum detonation index of slight detonation), and obtaining a preset detonation voltage value V2 when the detonation index of the combustion analyzer is (a + b)% (maximum detonation index of slight detonation); and determining a stable knock operation boundary by using the preset knock voltage value V1 and the preset knock voltage value V2, and when the ignition advance angle is positioned in the stable knock operation boundary, indicating that the fuel economy of the engine is better at the moment.
Of course, in some embodiments of the present invention, after selecting a plurality of knock indexes based on the minimum knock index and the maximum knock index, a plurality of knock voltage variances corresponding to the plurality of knock indexes are obtained, where the specific process is as follows:
selecting a plurality of knock indexes based on the knock index of the combustion analyzer being within a% of a minimum knock index and a% of a maximum knock index (a + b)%;
and respectively acquiring a plurality of corresponding groups of knock voltage preset values based on the minimum knock index a%, the maximum knock index (a + b)% and the plurality of knock indexes and based on the same time interval of engine operation.
Note that a plurality of knock indexes may be set to 1, 2, 3, and more, and so on; more specifically, when the number of the intermediate knock indexes is 3, the engine is operated for the same time interval (the time interval is not limited) at each of [ a%, (a + b 1)%, (a + b 2)%, (a + b 3)%, (a + b)% ] in this order, and a plurality of groups of knock voltage preset values (here, 5 groups including 2 groups of knock voltage preset values corresponding to the minimum knock index a% and the maximum knock index (a + b)% are obtained by the knock sensor).
In addition, a knock index of the combustion analyzer corresponds to a knock voltage value, when the knock index of the combustion analyzer reaches a preset index, the combustion analyzer sends a knock signal to the ECU control system, and the knock sensor acquires the knock signal of the engine and converts the knock signal into the knock voltage value.
In some embodiments of the present invention, the step of obtaining a plurality of knock voltage variances corresponding to the plurality of knock indexes and calculating an average value of the plurality of knock voltage variances to obtain a knock voltage preset value variance includes:
respectively calculating a plurality of corresponding knock voltage variances based on a plurality of groups of knock voltage preset values;
and calculating the average value of the plurality of knock voltage variances to obtain the final knock voltage preset value variance.
In combination with the above discussion, when the number of the middle knock indexes is 3, the knock voltage preset values are 5 groups, the knock voltage variances S1, S2, S3, S4 and S5 under each knock index are respectively calculated, the average value of the knock voltage variances is used to obtain a knock voltage preset value variance S0, and finally the knock voltage preset value V1, the knock voltage preset value V2 and the knock voltage preset value variance S0 are written into the ECU control system for subsequent comparison; certainly, the stability of the engine can be judged by detecting the variance S0 of the preset knock voltage value, the engine can be controlled to operate stably on the stable knock operation boundary, the control precision is higher, and the stability is better.
Specifically, the following steps of detecting the stability of the engine are carried out, at the moment, the engine is operated under the actual operation working condition, and the knock sensor can continuously acquire the knock signal of the engine and convert the knock signal into a knock voltage value; in this step, it should be noted that the engine needs to run through multiple work cycles to enable the knock sensor to respectively acquire multiple knock voltage values of the engine, which is set because errors possibly caused by a single set of data can be avoided by multiple sets of data, so that the detection result is more accurate.
Based on the requirement of the engine to run a plurality of working cycles, wherein one working cycle refers to four large strokes (air suction, compression, work doing and air exhaust) performed by the engine, and the engine can obtain a knock voltage value in one working cycle; and finally, averaging the plurality of knock voltage values to obtain an actual knock voltage value.
It should be noted that the nature and effect of the engine operation over multiple operating cycles is the same as that described above for obtaining multiple sets of knock voltage variation values over a time interval of engine operation, both for obtaining multiple sets of data, since the time interval of engine operation is equivalent to that of the engine operation over multiple operating cycles.
Referring to fig. 2, specifically, the relationship between the actual knock voltage value and the preset knock voltage values V1 and V2 determines whether the spark advance angle of the engine at that time meets the first requirement, and when the spark advance angle meets the first requirement, it is further necessary to obtain the variance of the actual knock voltage values calculated by the knock voltage values, and compare the variance of the actual knock voltage values with the variance of the preset knock voltage values, so as to determine whether the spark advance angle finally meets the requirement.
When the actual value of the detonation voltage is larger than the preset value V1 of the detonation voltage and smaller than the preset value V2 of the detonation voltage, the ignition advance angle meets a first requirement, the working efficiency of the engine at the moment is better, no change is needed, and the variance of the actual value of the detonation voltage is needed; when the actual value of the detonation voltage is smaller than the preset value V1 of the detonation voltage, the ignition advance angle needs to be increased to enable the ignition advance angle to be positioned in a stable operation boundary of the light detonation until the actual value of the detonation voltage is larger than the preset value V1 of the detonation voltage and smaller than the preset value V2 of the detonation voltage, and the variance of the actual value of the detonation voltage is obtained; of course, when the actual value of the knock voltage is greater than the preset value V2 of the knock voltage, the ignition advance angle needs to be reduced to be located within the stable operation boundary of the light knock until the actual value of the knock voltage is greater than the preset value V1 of the knock voltage and less than the preset value V2 of the knock voltage, and the variance of the actual value of the knock voltage is obtained.
The stability of the engine can be detected by determining the relation between the variance of the actual knock voltage value and the variance of the preset knock voltage value, wherein the variance of the actual knock voltage value is obtained by calculating a plurality of knock voltage values obtained by operating the engine for a plurality of working cycles; and when the variance of the actual value of the detonation voltage is larger than the variance of the preset value of the detonation voltage, reducing the ignition advance angle until the variance of the actual value of the detonation voltage is smaller than the variance of the preset value of the detonation voltage, wherein the ignition advance angle meets the requirement so as to ensure that the engine stably runs.
The second aspect of the present invention also provides an apparatus for confirming a spark advance angle, the apparatus being configured to perform the method for confirming a spark advance angle as claimed in the above claim, comprising:
the device comprises an acquisition unit, a control unit, a calculation unit and a comparison unit;
the acquisition unit is used for acquiring an engine detonation signal and acquiring a detonation voltage preset value V1 and a detonation voltage preset value V2;
the control unit is used for storing a detonation voltage preset value V1, a detonation voltage preset value V2 and a detonation voltage preset value variance;
the calculating unit is used for calculating the average value of a plurality of knock voltage variances;
the comparison unit is used for comparing the actual value of the detonation voltage with the preset value V1 of the detonation voltage, the actual value of the detonation voltage with the preset value V2 of the detonation voltage, and the variance of the actual value of the detonation voltage with the variance of the preset value of the detonation voltage.
The device for confirming the advance angle of ignition according to the embodiment of the invention has the same advantages as the method for confirming the advance angle of ignition, and the description is omitted here.
The invention also provides a system for confirming the advance angle of ignition, which comprises the device for confirming the advance angle of ignition as described in the above claims, and a memory, wherein the program in the memory stores the method for confirming the advance angle of ignition as described in the above claims.
The system for confirming the ignition advance angle according to the embodiment of the invention has the same advantages as the method for confirming the ignition advance angle, and the detailed description is omitted here.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method of identifying a spark advance, comprising:
acquiring a preset detonation voltage value V1 when the engine reaches the minimum detonation index of slight detonation and a preset detonation voltage value V2 when the engine reaches the maximum detonation index of slight detonation;
selecting a plurality of knock indexes based on the minimum knock index and the maximum knock index;
obtaining a plurality of knock voltage variances corresponding to the plurality of knock indexes;
calculating the average value of the plurality of knock voltage variances to obtain a knock voltage preset value variance;
and acquiring a detonation voltage actual value and a detonation voltage actual value variance of the engine under an actual operation condition, and confirming the ignition advance angle of the engine according to the relation between the detonation voltage actual value and the detonation voltage preset value V1 and the detonation voltage preset value V2 and the relation between the detonation voltage actual value variance and the detonation voltage preset value variance.
2. The method for confirming a spark advance as claimed in claim 1, wherein the step of confirming a spark advance of the engine according to the relationship between the knock voltage actual value and the knock voltage preset value V1 and the knock voltage preset value V2 and the relationship between the knock voltage actual value variance and the knock voltage preset value variance comprises:
acquiring a knock voltage actual value variance based on the fact that the knock voltage actual value is larger than the knock voltage preset value V1 and smaller than the knock voltage preset value V2;
and on the basis that the variance of the actual value of the detonation voltage is smaller than the variance of the preset value of the detonation voltage, the ignition advance angle meets the requirement.
3. The method of claim 1, wherein the step of obtaining a plurality of knock voltage variances corresponding to the plurality of knock indices comprises:
respectively acquiring a plurality of groups of corresponding knock voltage preset values based on the minimum knock index, the maximum knock index and the plurality of knock indexes and based on the same time interval of engine operation;
and acquiring the plurality of corresponding knock voltage variances based on the plurality of groups of knock voltage preset values.
4. The method of confirming spark advance as claimed in claim 2, wherein said step of obtaining a knock voltage actual value and a knock voltage actual value variance of said engine in an actual operating condition comprises:
the method comprises the steps that a plurality of working cycles are operated based on the fact that an engine is in an actual operation working condition, and a plurality of detonation voltage values of the engine are obtained respectively;
and obtaining the actual knock voltage value based on the average value of the plurality of knock voltage values.
5. The method for confirming a spark advance as claimed in claim 4, wherein the step of obtaining a variance of the actual knock voltage value based on the actual knock voltage value being greater than the preset knock voltage value V1 and less than the preset knock voltage value V2 further comprises:
and acquiring the knock voltage actual value variance based on the knock voltage actual value being greater than the knock voltage preset value V1 and less than the knock voltage preset value V2 and based on the plurality of knock voltage values of the engine.
6. The method for confirming an ignition advance angle according to claim 4, wherein the step of obtaining a knock voltage actual value variance based on the knock voltage actual value being greater than the knock voltage preset value V1 and less than the knock voltage preset value V2 further comprises:
and based on the fact that the actual value of the detonation voltage is smaller than the preset value V1 of the detonation voltage, increasing an ignition advance angle until the actual value of the detonation voltage is larger than the preset value V1 of the detonation voltage and smaller than the preset value V2 of the detonation voltage, and obtaining the variance of the actual value of the detonation voltage.
7. The method for confirming an ignition advance angle according to claim 4, wherein the step of obtaining a knock voltage actual value variance based on the knock voltage actual value being greater than the knock voltage preset value V1 and less than the knock voltage preset value V2 further comprises:
and based on the fact that the actual value of the detonation voltage is larger than the preset value V2 of the detonation voltage, reducing the ignition advance angle until the actual value of the detonation voltage is larger than the preset value V1 of the detonation voltage and smaller than the preset value V2 of the detonation voltage, and obtaining the variance of the actual value of the detonation voltage.
8. The method for confirming a spark advance as claimed in claim 2, wherein the step of meeting a spark advance requirement based on the variance of the actual value of the knock voltage being smaller than the variance of the preset value of the knock voltage further comprises:
and reducing the ignition advance angle until the variance of the actual value of the knock voltage is smaller than the variance of the preset value of the knock voltage based on the fact that the variance of the actual value of the knock voltage is larger than the variance of the preset value of the knock voltage, wherein the ignition advance angle meets the requirement.
9. An apparatus for confirming a spark advance angle, the apparatus being configured to perform the method for confirming a spark advance angle as claimed in claim 1, comprising:
the device comprises an acquisition unit, a control unit, a calculation unit and a comparison unit;
the acquisition unit is used for acquiring an engine detonation signal and acquiring a detonation voltage preset value V1 and a detonation voltage preset value V2;
the control unit is used for storing a detonation voltage preset value V1, a detonation voltage preset value V2 and a detonation voltage preset value variance;
the calculation unit is used for calculating the average value of the plurality of knock voltage variances;
the comparison unit is used for comparing the actual value of the detonation voltage with the preset value V1 of the detonation voltage, the actual value of the detonation voltage with the preset value V2 of the detonation voltage, and the variance of the actual value of the detonation voltage and the variance of the preset value of the detonation voltage.
10. A system for confirming spark advance angle, comprising the device for confirming spark advance angle as claimed in claim 9, and further comprising a memory, wherein the program in the memory stores the method for confirming spark advance angle as claimed in claim 1.
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| CN202210726817.1A CN115234422A (en) | 2022-06-24 | 2022-06-24 | Method, device and system for confirming ignition advance angle |
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| CN202210726817.1A CN115234422A (en) | 2022-06-24 | 2022-06-24 | Method, device and system for confirming ignition advance angle |
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| CN202210726817.1A Pending CN115234422A (en) | 2022-06-24 | 2022-06-24 | Method, device and system for confirming ignition advance angle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115234422A (en) |
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2022
- 2022-06-24 CN CN202210726817.1A patent/CN115234422A/en active Pending
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