CN114743608A

CN114743608A - Method and device for determining environmental factor of NOx model, electronic equipment and medium

Info

Publication number: CN114743608A
Application number: CN202210505803.7A
Authority: CN
Inventors: 栾军山; 姚亚俊; 张晨; 张玉娟
Original assignee: Weichai Power Co Ltd
Current assignee: Weichai Power Co Ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-07-12

Abstract

The invention discloses a method and a device for determining an environmental factor of a NOx model, electronic equipment and a medium. Determining a plurality of working areas by calibrating a standard environment area point, a high-temperature environment area point, a plateau alpine environment area point and an alpine environment area point and taking the standard environment area point, the high-temperature environment area point, the plateau alpine environment area point and the alpine environment area point as dividing boundary points; acquiring current environment temperature and current environment pressure, and determining a target working area where the current environment temperature and the current environment pressure are located; and determining a reference environment correction factor based on the target working area, and calculating an environment factor correction coefficient of the NOx model according to the reference environment correction factor. The problem that the NOx emission of the engine is greatly influenced by environmental factors such as altitude and temperature in the actual operation process is solved, and the beneficial effects of correcting the NOx model and improving the accuracy of the NOx model are achieved.

Description

Method and device for determining environmental factor of NOx model, electronic equipment and medium

Technical Field

The invention relates to the technical field of NOx model correction, in particular to a method and a device for determining an environmental factor of a NOx model, electronic equipment and a medium.

Background

In order to meet the emission requirements of higher standards, the engine aftertreatment system performs urea injection according to the emission of NOx (nitrogen oxide) generated by combustion of the engine so as to reduce the pollution of the NOx to the environment. Research shows that the NOx emission of an engine is greatly influenced by environmental factors such as altitude, temperature and the like in the actual operation process, and the NOx emission is generally estimated by establishing a NOx model at present, so that the environmental factors are very important for correcting the NOx model.

Disclosure of Invention

The invention provides a method, a device, electronic equipment and a medium for determining an environmental factor of a NOx model, which are used for solving the problem that the NOx emission of an engine is greatly influenced by environmental factors such as altitude, temperature and the like in the actual operation process.

According to an aspect of the present invention, there is provided an environmental factor determination method of a NOx model, including:

respectively calibrating a standard environment region point, a high-temperature environment region point, a plateau alpine environment region point and an alpine environment region point according to the environment temperature and the environment pressure;

determining a plurality of working areas by taking the standard environment area points, the high-temperature environment area points, the plateau alpine environment area points and the alpine environment area points as dividing boundary points;

acquiring current environment temperature and current environment pressure, and determining a target working area where the current environment temperature and the current environment pressure are located according to the current environment temperature and the current environment pressure;

and determining a reference environment correction factor based on the target working area, and calculating an environment factor correction coefficient of the NOx model according to the reference environment correction factor.

Optionally, with regional point of standard environment the regional point of high temperature environment regional point of plateau environment regional point plateau alpine environment regional point and regional point of alpine environment is for dividing the boundary point, confirms a plurality of work areas, includes:

determining a first working area based on the standard environment area point and the high temperature environment area point, determining a second working area based on the high temperature environment area point, determining a third working area based on the high temperature environment area point and the plateau environment area point, determining a fourth working area based on the high temperature environment area point, determining a fifth working area based on the plateau environment area point and the plateau alpine environment area point, determining a sixth working area based on the high temperature environment area point, determining a seventh working area based on the plateau alpine environment area point and the alpine environment area point, determining an eighth working area based on the high temperature environment area point, determining a ninth working area based on the standard environment area point and the alpine environment area point, determining a tenth working area based on the standard environment area point, the plateau alpine environment area point and the alpine environment area point, an eleventh working area is determined based on the standard environment area point, the plateau environment area point and the plateau alpine environment area point, and a twelfth working area is determined based on the standard environment area point, the high temperature environment area point and the plateau environment area point.

Optionally, the target working area is the first working area or the ninth working area;

determining a reference environment correction factor based on the target working area, and calculating an environment factor correction coefficient of the NOx model according to the reference environment correction factor, wherein the environment factor correction factor comprises:

determining a first reference environment correction factor based on the temperature parameter corresponding to the first working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the first reference environment correction factor; or,

and determining a ninth reference environment correction factor based on the temperature parameter corresponding to the ninth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the ninth reference environment correction factor.

Optionally, the target working area is the second working area, the fourth working area, the sixth working area, or the eighth working area;

determining a second reference environment correction factor based on the corrected MAP corresponding to the second working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the second reference environment correction factor; or,

determining a fourth reference environment correction factor based on the corrected MAP corresponding to the fourth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the fourth reference environment correction factor; or,

determining a sixth reference environment correction factor based on the corrected MAP corresponding to the sixth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the sixth reference environment correction factor; or,

and determining an eighth reference environment correction factor based on the corrected MAP corresponding to the eighth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the eighth reference environment correction factor.

Optionally, the target working area is the third working area, the fifth working area, or the seventh working area;

determining a third reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the third working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the third reference environment correction factor; or the like, or a combination thereof,

determining a fifth reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the fifth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the fifth reference environment correction factor; or the like, or a combination thereof,

and determining a seventh reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the seventh working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the seventh reference environment correction factor.

Optionally, the target working area is the tenth working area, the eleventh working area, or the twelfth working area;

determining a tenth reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the tenth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the tenth reference environment correction factor; or,

determining an eleventh reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the eleventh working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the eleventh reference environment correction factor; or,

and determining a twelfth reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the twelfth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the twelfth reference environment correction factor.

Optionally, the method for determining an environmental factor of the NOx model further includes:

and determining the NOx model value of the NOx model according to the original NOx value and the environmental factor correction coefficient.

According to another aspect of the present invention, there is provided an environmental factor determination apparatus of a NOx model, including:

the environment area point determining module is used for respectively calibrating a standard environment area point, a high-temperature environment area point, a plateau alpine environment area point and an alpine environment area point according to the environment temperature and the environment pressure;

the working area determining module is used for determining a plurality of working areas by taking the standard environment area points, the high-temperature environment area points, the plateau high-cold environment area points and the high-cold environment area points as dividing boundary points;

the target working area determining module is used for acquiring the current environmental temperature and the current environmental pressure and determining the target working area according to the current environmental temperature and the current environmental pressure;

and the environment factor correction factor determining module is used for determining a reference environment correction factor based on the target working area and calculating an environment factor correction factor of the NOx model according to the reference environment correction factor.

According to another aspect of the present invention, there is provided an electronic apparatus including:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,

the memory stores a computer program executable by the at least one processor, the computer program being executable by the at least one processor to enable the at least one processor to perform the method for determining an environmental factor of a NOx model according to any of the embodiments of the present invention.

According to another aspect of the present invention, there is provided a computer-readable storage medium storing computer instructions for causing a processor to implement the method for determining an environmental factor of a NOx model according to any one of the embodiments of the present invention when the computer instructions are executed.

According to the technical scheme of the embodiment of the invention, a standard environment area point, a high-temperature environment area point, a plateau alpine environment area point and an alpine environment area point are respectively calibrated according to the environment temperature and the environment pressure; determining a plurality of working areas by taking the standard environment area point, the high-temperature environment area point, the plateau alpine environment area point and the alpine environment area point as dividing boundary points; acquiring current environment temperature and current environment pressure, and determining a target working area where the current environment temperature and the current environment pressure are located according to the current environment temperature and the current environment pressure; and determining a reference environment correction factor based on the target working area, and calculating an environment factor correction coefficient of the NOx model according to the reference environment correction factor. The problem that the NOx emission of the engine is greatly influenced by environmental factors such as altitude and temperature in the actual operation process is solved, and the beneficial effects of correcting the NOx model and improving the accuracy of the NOx model are achieved.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they necessarily limit the scope of the invention. Other features of the present invention will become apparent from the following description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a flow chart of a method for determining an environmental factor of a NOx model according to an embodiment of the present invention;

FIG. 2 is a schematic diagram illustrating division of a plurality of work areas according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a modification of a raw NOx model according to an embodiment of the present invention;

FIG. 4 is a flowchart of an environmental factor determination method for a NOx model according to a second embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an environmental factor determining apparatus for a NOx model according to a third embodiment of the present invention;

fig. 6 is a schematic structural diagram of an electronic device that implements the method for determining an environmental factor of a NOx model according to the embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described 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.

Example one

Fig. 1 is a flowchart of an environmental factor determination method for a NOx model according to an embodiment of the present invention, which is applicable to a case where an original NOx model is accurately corrected by a determined environmental correction factor, where the environmental factor determination method for the NOx model can be performed by an environmental factor determination device for the NOx model, which can be implemented in a hardware and/or software manner, and the environmental factor determination device for the NOx model can be configured in an electronic device corresponding to an environmental test chamber of an engine. As shown in fig. 1, the method for determining the environmental factor of the NOx model includes:

s110, respectively calibrating a standard environment area point, a high-temperature environment area point, a plateau alpine environment area point and an alpine environment area point according to the environment temperature and the environment pressure.

The method comprises the following steps of respectively calibrating a standard environment region point, a high-temperature environment region point, a plateau alpine environment region point and an alpine environment region point according to an environment temperature and an environment pressure, respectively determining a Base _ MAP, a Heat _ MAP, an alternative _ MAP, a ColdAlti _ MAP and a Cold _ MAP corresponding to the calibrated standard environment region point, the calibrated high-temperature environment region point, the calibrated plateau alpine environment region point and the calibrated alpine environment region point, and specifically determining the corresponding relationship as shown in the following table 1.

TABLE 1

Referring to table 1, the normalized ambient area point P1 is determined by a normalized ambient temperature parameter tNom _ mp and a normalized ambient pressure parameter pNom _ C.

It is understood that since the standard ambient temperature parameter tNom _ mp represents a temperature range from a to B, the standard ambient temperature parameter tNom _ mp is a temperature region rather than a simple point.

The calibration of the Base _ MAP corresponding to the standard ambient region point P1 is a point determined within the temperature range represented by the standard ambient temperature parameter tNom _ mp and the pressure range represented by the standard ambient pressure parameter pNom _ C, which is not limited in any way by the present embodiment.

For example, the standard ambient temperature parameter tNom _ mp represents a temperature range from a to B, where A, B is a calibration quantity, and for example, a may be calibrated to be 0 ℃, B may be 35 ℃, if the ambient temperature is lower than 0 ℃, the standard ambient temperature parameter tNom _ mp may be 0 ℃, if the ambient temperature is higher than 35 ℃, the standard ambient temperature parameter tNom _ mp may be 35 ℃, and if the ambient temperature is between a and B, the ambient temperature value at that time may be directly output, for example, the standard ambient temperature parameter tNom _ mp may be 25 ℃.

Further, taking the standard ambient temperature parameter tNom _ mp at 25 ℃ as an example, Base _ MAP is calibrated at 25 ℃, and after Base _ MAP is calibrated at 25 ℃, the standard ambient temperature between a and B is subjected to NOx emission with reference to Base _ MAP.

The high-temperature ambient region point P2 is determined by a high-temperature ambient pressure parameter pNom _ C (which coincides with the standard ambient pressure parameter pNom _ C) and a high-temperature ambient temperature parameter teeat _ C, which are respectively obtained by calibration, and the ambient point at which Heat _ MAP is calibrated is referred to as a high-temperature ambient region point P2(pNom _ C teheat _ C).

Illustratively, if the calibrated high-temperature ambient pressure parameter pNom _ C is 1000hpa and the calibrated high-temperature ambient temperature parameter teheat _ C is 50 ℃, then Heat _ MAP is the ratio of actual NOx production to Base _ MAP for that ambient condition. Where Base _ MAP refers to the raw NOx model value calibrated under the standard conditions described above, for example, at a certain operating point of the engine, Base _ MAP is 500ppm, and 600ppm at the same operating point of 1000hpa/50 ℃, then Heat _ MAP value at that point is 1.2.

The plateau environment region point P3 is determined by the plateau environment pressure parameter pAlti _ C and the plateau environment temperature parameter tNom _ mp (which are identical to the standard environment temperature parameter tNom _ mp), and the environment point to which the Altitude _ MAP is calibrated is referred to as the plateau environment region point P3(pAlti _ C tNom _ mp).

For example, the calibrated plateau ambient pressure parameter pAlti _ C is calibrated to 650hpa, and the plateau ambient temperature parameter tNom _ mp is a non-calibrated variable, for example, the plateau ambient temperature parameter tNom _ mp may be selected to be 25 ℃, since the Base _ MAP is calibrated at the standard temperature of 25 ℃, if the temperature is difficult to control during specific calibration, the similar temperature may be selected, and the effect is not great.

The plateau alpine environment region point P4 is determined by a plateau alpine environment pressure parameter pcoldali _ C and a plateau alpine environment temperature parameter tcoldali _ C, and the environment point labeled coldali _ MAP is referred to as a plateau alpine environment region point P4 (pcoldali _ C tcoldali _ C).

For example, the highland severe cold environment pressure parameter pcoldali _ C is 800hpa, and the highland severe cold environment temperature parameter tcoldali _ C is-10 ℃, where the highland severe cold environment pressure parameter pcoldali _ C and the highland severe cold environment temperature parameter tcoldali _ C are calibrated within the range of the highland environment pressure parameter paclti _ C and the severe cold environment temperature parameter tCold _ C.

The arctic-alpine-environment region point P5 is determined by the arctic-environment pressure parameter pNom _ C (which coincides with the high-temperature-environment pressure parameter pNom _ C and the standard-environment pressure parameter pNom _ C) and the arctic-environment temperature parameter tCold _ C, and the environment point to which Cold _ MAP is calibrated is referred to as the arctic-environment region point P5(pNom _ C tCold _ C). Illustratively, the arctic ambient temperature parameter tCold _ C is calibrated to-30 ℃.

And S120, determining a plurality of working areas by taking the standard environment area points, the high-temperature environment area points, the plateau high-cold environment area points and the high-cold environment area points as dividing boundary points.

Wherein, based on standard environment region point with high temperature environment region point confirms first work area, based on high temperature environment region point confirms second work area, based on high temperature environment region point with high altitude environment region point confirms third work area, based on high temperature environment region point confirms fourth work area, based on high altitude environment region point with high altitude and cold environment region point confirms fifth work area, based on high temperature environment region point confirms sixth work area, based on high altitude and cold environment region point with high altitude and cold environment region point confirms seventh work area, based on high temperature environment region point confirms eighth work area, based on standard environment region point with high altitude and cold environment region point confirms ninth work area, based on standard environment region point, The plateau high and cold environment region point with the high and cold environment region point confirms tenth work area, based on standard environment region point plateau environment region point with the high and cold environment region point confirms eleventh work area, based on standard environment region point high temperature environment region point with the high and cold environment region point confirms twelfth work area.

On the basis of the above, fig. 2 is a schematic diagram of division of a plurality of working areas according to an embodiment of the present invention,

12 working areas are defined in the environment range of the whole environment temperature and the environment pressure, and the dividing boundary points of the working areas are defined by the standard environment area point P1, the high-temperature environment area point P2, the plateau environment area point P3, the plateau and high-cold environment area point P4 and the high-cold environment area point P5.

Specifically, as shown in fig. 2, a line1 is connected to the high temperature environment region point P2 and the plateau environment region point P3, a line2 is connected to the plateau environment region point P3 and the plateau high cold environment region point P4, a line3 is connected to the standard environment region point P1 and the plateau high cold environment region point P4, a line4 is connected to the plateau high cold environment region point P4 and the high cold environment region point P5, and the illustrated dotted lines respectively form a straight angle distribution with the above-mentioned similar line lines.

Illustratively, with continued reference to fig. 2, region 1 (i.e., the first operating region) is a region where the ambient pressure is greater than the standard ambient pressure parameter pNom _ C and the ambient temperature is greater than the standard ambient temperature parameter tNom _ mp, and is referred to herein as a point greater than 1000hpa and greater than 35 ℃, in accordance with the foregoing calibration example; the region 12 (i.e., the twelfth working region) refers to a point where the ambient pressure is between the high ambient pressure parameter pAlti _ C and the standard ambient pressure parameter pNom _ C, and the ambient temperature is below the line1 (where, there is a fixed mathematical relationship between the pressure and the temperature in the line1, and whether the pressure and the temperature are within the line1 may be determined according to specific ambient conditions), and other regions are similar, and the range of each region is determined according to defined parameters.

S130, obtaining the current environment temperature and the current environment pressure, and determining the target working area according to the current environment temperature and the current environment pressure.

The current ambient temperature EnvT _ t represents a real-time ambient temperature, and may be obtained by an ambient temperature sensor on the engine, and the current ambient pressure EnvP _ p represents a real-time ambient pressure, and may be obtained by an ambient pressure sensor on the engine.

Specifically, according to the current ambient temperature EnvT _ t and the current ambient pressure EnvP _ p, the target working area is determined to be one of the first working area to the twelfth working area.

And S140, determining a reference environment correction factor based on the target working area, and calculating an environment factor correction coefficient of the NOx model according to the reference environment correction factor.

In this embodiment, referring to table 1, the reference environment correction factor Fac can be calculated by the following formula:

Fac＝Fac_0*1+Fac_1*Heat_MAP+Fac_2*Altitude_MAP+Fac_3*ColdAlti_MAP+Fac_4*Cold_MAP

wherein Fac _0 to Fac _4 represent correction factors of the respective environment region points in table 1, and Fac _0 to Fac _4 are obtained by calculation; heat _ MAP, efficiency _ MAP, coldabli _ MAP, Cold _ MAP and the like represent four emission correction MAPs, the inputs of the MAPs are the rotating speed and the fuel injection quantity of the engine (specifically, the rotating speed and the fuel injection quantity determine the operating condition of the engine), the MAP value is obtained by test calibration and an actual correction value is output, and specifically, the MAP value is obtained by predefined environmental condition actual calibration.

Fig. 3 is a schematic diagram of a principle of correcting an original NOx model according to an embodiment of the present invention, as shown in fig. 3, in this embodiment, an environmental factor correction model is built to accurately correct the original NOx model (the original NOx model refers to estimated NOx under a standard environment, specifically, under conditions of 25 ℃ and 1000 hpa).

It should be noted that the NOx model mentioned in this embodiment is composed of a steady-state NOx pulse and a transient model, where the steady-state NOx pulse refers to NOx emission of the engine under a standard environment and under a condition that an engine combustion parameter and an intake air parameter are determined, and a specific value is obtained according to actual data calibration.

According to the technical scheme of the embodiment of the invention, a standard environment area point, a high-temperature environment area point, a plateau alpine environment area point and an alpine environment area point are respectively calibrated according to the environment temperature and the environment pressure; determining a plurality of working areas by taking the standard environment area points, the high-temperature environment area points, the plateau alpine environment area points and the alpine environment area points as dividing boundary points; acquiring current environment temperature and current environment pressure, and determining a target working area where the current environment temperature and the current environment pressure are located according to the current environment temperature and the current environment pressure; and determining a reference environment correction factor based on the target working area, and calculating an environment factor correction coefficient of the NOx model according to the reference environment correction factor. The problem that the NOx emission of the engine is greatly influenced by environmental factors such as altitude and temperature in the actual operation process is solved, and the beneficial effects of correcting the NOx model and improving the accuracy of the NOx model are achieved.

Example two

Fig. 4 is a flowchart of an environmental factor determining method of a NOx model according to a second embodiment of the present invention, and the determination of the environmental factor correction factor is further limited based on the second embodiment. As shown in fig. 4, the method for determining the environmental factor of the NOx model includes:

s410, respectively calibrating a standard environment area point, a high-temperature environment area point, a plateau alpine environment area point and an alpine environment area point according to the environment temperature and the environment pressure.

S420, based on standard environment regional point with high temperature environment regional point determines first work area, based on high temperature environment regional point determines second work area, based on high temperature environment regional point with plateau environment regional point determines third work area, based on high temperature environment regional point determines fourth work area, based on plateau environment regional point with plateau alpine environment regional point determines fifth work area, based on high temperature environment regional point determines sixth work area, based on plateau alpine environment regional point determines seventh work area with alpine environment regional point, based on high temperature environment regional point determines eighth work area, based on standard environment regional point with alpine environment regional point determines ninth work area, based on standard environment regional point, The plateau high and cold environment region point with the high and cold environment region point confirms tenth work area, based on standard environment region point plateau environment region point with the high and cold environment region point confirms eleventh work area, based on standard environment region point high temperature environment region point with the high and cold environment region point confirms twelfth work area.

S430, acquiring the current environment temperature and the current environment pressure, and determining the target working area according to the current environment temperature and the current environment pressure.

S440, the target working area is the first working area or the ninth working area.

S441, determining a first reference environment correction factor based on the temperature parameter corresponding to the first working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the first reference environment correction factor; or determining a ninth reference environment correction factor based on the temperature parameter corresponding to the ninth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the ninth reference environment correction factor. Step S480 is performed.

Illustratively, if the target operating region is in region 1 (i.e., the first operating region), with reference to table 1, Fac0 and Fac1 are interpolated from parameters defined by standard ambient region point P1 and high-temperature ambient region point P2, specifically pNom _ C is the same in the definitions of high-temperature ambient region point P2(pNom _ C thheat _ C) and standard ambient region point P1(pNom _ C tNom _ mp), and only temperature definitions tnat _ C and tNom _ mp are different, so that only temperature is interpolated here, and the temperature interpolation methods for standard ambient region point P1 and high-temperature ambient region point P2 are described below, and Fac _2, Fac _3, and Fac _4 coefficients are 0.

With continued reference to FIG. 2, the current actual environmental conditions are unrelated to the other defined environmental region points, illustrated schematically as "region 1(P1& P2)", where (P1& P2) represent interpolation of parameters defined by a standard environmental region point P1 and a high temperature environmental region point P2:

the environmental factor correction factor Fac ═ Fac _0 × 1+ Fac _1 × Heat _ MAP +0 × activity _ MAP +0 × coldadd _ MAP +0 × Cold _ MAP

Wherein: fac1 ═ tNom _ mp-EnvT _ t)/(tNom _ mp-thheat _ C)

Fac0＝1-Fac1

The first reference environment correction factor includes Fac0 and Fac 1.

For example: the ambient temperature in zone 1 is EnvT — t — 43 ℃, then:

Fac1＝(35-43)/(35-50)＝0.53

it is understood that the ambient temperature EnvT _ t _ mp exceeds the standard ambient temperature parameter tNom _ mp 35 deg.c, and the reference temperature adopts the standard ambient temperature parameter tNom _ mp 35 deg.c.

Fac_0＝1-0.53＝0.47

Fac＝0.47*1+0.53*Heat_MAP＝0.47*1+0.53*1.2＝1.106

The operating point Heat _ MAP is obtained from calibration, see above.

Further, the NOx model value is 1.106 Base _ MAP 1.106 500 553

Similarly, if the target operating region is in region 9 (i.e., the ninth operating region), with reference to table 1, Fac _0 and Fac _4 are obtained by performing interpolation calculation on parameters defined by the standard environment region point P1 and the alpine environment region point P5, specifically pNom _ C is the same in the definitions of the alpine environment region point P5(pNom _ C tCold _ C) and the standard environment region point P1(pNom _ C tNom _ mp), and only the temperature definitions tfeat _ C and tNom _ mp are different, so that only the temperature can be interpolated here, and the temperature interpolation methods of the standard environment region point P1 and the alpine environment region point P5 can be referred to above, and Fac _2, Fac _3, and Fac _1 coefficients are 0, which are not described herein by way of brevity.

S450, the target working area is the second working area, the fourth working area, the sixth working area or the eighth working area.

S451, determining a second reference environment correction factor based on the corrected MAP corresponding to the second working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the second reference environment correction factor; or determining a fourth reference environment correction factor based on the corrected MAP corresponding to the fourth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the fourth reference environment correction factor; or determining a sixth reference environment correction factor based on the corrected MAP corresponding to the sixth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the sixth reference environment correction factor; or determining an eighth reference environment correction factor based on the corrected MAP corresponding to the eighth working region, and calculating an environment factor correction coefficient corresponding to the NOx model according to the eighth reference environment correction factor. Step S480 is executed.

Illustratively, if the target operating region is in region 2 (i.e., the second operating region, region 2(P2) in fig. 2), then in conjunction with table 1, the second reference environmental correction factor Fac _1 is 1, Fac _0, Fac _2, Fac _3, and Fac _4 are all 0, and then the environmental factor correction factor Fac is:

Fac＝0*1+1*Heat_MAP+0*Altitude_MAP+0*ColdAlti_MAP+0*Cold_MAP＝Heat_MAP

similarly, if the target operating region is in region 4 (i.e., the fourth operating region, region 4(P3) in fig. 2), then with reference to table 1, the fourth reference environmental correction factor Fac _2 is equal to 1, and Fac _0, Fac _1, Fac _3, and Fac _4 are all equal to 0, and the corresponding environmental factor correction factor Fac is obtained in accordance with the above.

Similarly, if the target operating region is in region 6 (i.e., the sixth operating region, which is "region 6 (P4)" in fig. 2), then with reference to table 1, the sixth reference environmental correction factor Fac _3 is equal to 1, and Fac _0, Fac _1, Fac _2, and Fac _4 are all equal to 0, and the corresponding environmental factor correction factor Fac is obtained in accordance with the above-mentioned correspondence.

Similarly, if the target operating region is in region 8 (i.e., the eighth operating region, "region 8 (P5)" in fig. 2), then with reference to table 1, the eighth reference environmental correction factor Fac _4 is equal to 1, and Fac _0, Fac _1, Fac _3, and Fac _2 are all equal to 0, and the corresponding environmental factor correction factor Fac is obtained in accordance with the above.

And S460, the target working area is the third working area, the fifth working area or the seventh working area.

S461, determining a third reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the third working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the third reference environment correction factor; or determining a fifth reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the fifth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the fifth reference environment correction factor; or determining a seventh reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the seventh working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the seventh reference environment correction factor. Step S480 is performed.

Illustratively, if the target working region is in region 3 (i.e., the third working region, region 3(P2& P3) in fig. 2), then with reference to table 1, the third reference environmental correction factor includes Fac1 and Fac2, Fac1 is obtained by interpolation of the temperature parameters defined by plateau environment region point P3 and high temperature environment region point P2, Fac2 is obtained by interpolation of the pressure parameters defined by plateau environment region point P3 and high temperature environment region point P2, and then the environmental factor correction factor Fac is:

Fac＝Fac_0*1+Fac_1*Heat_MAP+Fac_2*Altitude_MAP+0*ColdAlti_MAP+0*Cold_MAP

similarly, if the target operating region is located in region 5 (i.e., the fifth operating region, region 5(P3& P4) in fig. 2), then with reference to table 1, the fourth reference environmental correction factor includes Fac2 and Fac3, Fac2 is obtained by interpolation calculation of the pressure parameter defined by plateau environmental region point P3 and high-temperature environmental region point P2, and Fac3 is obtained by interpolation calculation of the temperature parameter defined by plateau environmental region point P3 and plateau high-cold environmental region point P4, and then, the corresponding environmental factor correction factor Fac is obtained by referring to the above correspondence.

Similarly, if the target operating region is located in region 7 (i.e., the seventh operating region, region 7(P4& P5) in fig. 2), then with reference to table 1, the fourth reference environment correction factor includes Fac3 and Fac4, Fac3 is obtained by interpolation of the temperature parameters defined by plateau environment region point P3 and plateau alpine environment region point P4, and Fac4 is obtained by interpolation of the pressure parameters defined by plateau alpine environment region point P4 and alpine environment region point P5, and then the corresponding environment factor correction factor Fac is obtained by referring to the above correspondence.

S470, the target working area is the tenth working area, the eleventh working area, or the twelfth working area.

S471, determining a tenth reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the tenth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the tenth reference environment correction factor; or determining an eleventh reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the eleventh working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the eleventh reference environment correction factor; or determining a twelfth reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the twelfth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the twelfth reference environment correction factor. Step S480 is executed.

Illustratively, if the target operating region is located in region 10 (i.e., the tenth operating region, region 10(P1& P4& P5) in fig. 2), then in conjunction with table 1, the tenth reference environmental correction factor includes Fac _3 and Fac _4, Fac _3 being obtained by interpolation of the pressure parameter defined by standard environmental region point P1 and plateau alpine environmental region point P4, Fac _4 being obtained by interpolation of the temperature parameter defined by standard environmental region point P1 and alpine environmental region point P5, and then the environmental factor correction factor Fac is:

Fac＝Fac_0*1+0*Heat_MAP+0*Altitude_MAP+Fac_3*ColdAlti_MAP+Fac_4*Cold_MAP

similarly, if the target operating region is located in region 11 (i.e., the eleventh operating region, "region 11(P1& P3& P4)" in fig. 2), then in conjunction with table 1, the eleventh reference environmental correction factor includes Fac _2 and Fac _3, Fac _2 being obtained by interpolation of the pressure parameters defined by the standard environmental region point P1 and the plateau environmental region point P3, Fac _3 being obtained by interpolation of the temperature parameters defined by the standard environmental region point P1 and the plateau alpine environmental region point P4, and then the environmental factor correction factor Fac is:

Fac＝Fac_0*1+0*Heat_MAP+Fac_2*Altitude_MAP+Fac_3*ColdAlti_MAP+0*Cold_MAP

similarly, if the target operating region is located in the region 12 (i.e., the twelfth operating region, "region 12(P1& P2& P3)" in fig. 2), then in conjunction with table 1, the twelfth reference environment correction factor includes Fac _1 and Fac _2, Fac _1 being obtained by interpolation of the temperature parameters defined by the standard environment region point P1 and the high temperature environment region point P2, Fac _2 being obtained by interpolation of the pressure parameters defined by the standard environment region point P1 and the high altitude environment region point P3, and then the environment factor correction factor Fac is:

Fac＝Fac_0*1+Fac_1*Heat_MAP+Fac_2*Altitude_MAP+0*ColdAlti_MAP+0*Cold_MAP

wherein: fac2 ═ pNom _ C-EnvP _ p)/(pNom _ C-pAlti _ C)

Fac1＝(tNom_mp-EnvT_t)/(tNom_mp-tHeat_C)

Fac0＝1-Fac1-Fac2。

And S480, determining the NOx model value of the NOx model according to the original NOx value and the environmental factor correction coefficient.

EXAMPLE III

Fig. 5 is a schematic structural diagram of an environment factor determination apparatus of a NOx model according to a third embodiment of the present invention. As shown in fig. 5, the environmental factor determination device of the NOx model includes:

an environment region point determining module 510, configured to perform calibration of a standard environment region point, a high temperature environment region point, a plateau alpine environment region point, and an alpine environment region point according to an environment temperature and an environment pressure;

a working area determining module 520, configured to determine a plurality of working areas by using the standard environment area point, the high-temperature environment area point, the plateau alpine environment area point, and the alpine environment area point as dividing boundary points;

a target working area determining module 530, configured to execute obtaining a current ambient temperature and a current ambient pressure, and determine a target working area where the target working area is located according to the current ambient temperature and the current ambient pressure;

and an environment factor correction factor determining module 540, configured to determine a reference environment correction factor based on the target working area, and calculate an environment factor correction factor of the NOx model according to the reference environment correction factor.

Optionally, the work area determining module 520 includes:

the environment factor correction factor determining module 540 includes:

determining a third reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the third working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the third reference environment correction factor; or,

the environment factor correction factor determining module 540 includes:

determining an eleventh reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the eleventh working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the eleventh reference environment correction factor; or the like, or a combination thereof,

Optionally, the environment factor determination device of the NOx model further includes:

The device for determining the environmental factor of the NOx model provided by the embodiment of the invention can execute the method for determining the environmental factor of the NOx model provided by any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the method for determining the environmental factor of the NOx model.

Example four

FIG. 6 illustrates a schematic structural diagram of an electronic device 10 that may be used to implement an embodiment of the present invention. Electronic devices are intended to represent various forms of digital computers, such as laptops, desktops, workstations, personal digital assistants, servers, blade servers, mainframes, and other appropriate computers. The electronic device may also represent various forms of mobile devices, such as personal digital assistants, cellular phones, smart phones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions, are meant to be exemplary only, and are not meant to limit implementations of the inventions described and/or claimed herein.

As shown in fig. 6, the electronic device 10 includes at least one processor 11, and a memory communicatively connected to the at least one processor 11, such as a Read Only Memory (ROM)12, a Random Access Memory (RAM)13, and the like, wherein the memory stores a computer program executable by the at least one processor, and the processor 11 can perform various suitable actions and processes according to the computer program stored in the Read Only Memory (ROM)12 or the computer program loaded from a storage unit 18 into the Random Access Memory (RAM) 13. In the RAM 13, various programs and data necessary for the operation of the electronic apparatus 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other via a bus 14. An input/output (I/O) interface 15 is also connected to bus 14.

A number of components in the electronic device 10 are connected to the I/O interface 15, including: an input unit 16 such as a keyboard, a mouse, or the like; an output unit 17 such as various types of displays, speakers, and the like; a storage unit 18 such as a magnetic disk, an optical disk, or the like; and a communication unit 19 such as a network card, modem, wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information/data with other devices via a computer network such as the internet and/or various telecommunication networks.

The processor 11 may be a variety of general and/or special purpose processing components having processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), various specialized Artificial Intelligence (AI) computing chips, various processors running machine learning model algorithms, a Digital Signal Processor (DSP), and any suitable processor, controller, microcontroller, or the like. The processor 11 executes the various methods and processes described above, such as the environmental factor determination method of the NOx model.

In some embodiments, the method of determining the environmental factor of the NOx model may be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and/or installed onto the electronic device 10 via the ROM 12 and/or the communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the above described method of determining an environmental factor of a NOx model may be performed. Alternatively, in other embodiments, the processor 11 may be configured to perform the environmental factor determination method of the NOx model in any other suitable manner (e.g., by means of firmware).

Various implementations of the systems and techniques described here above may be implemented in digital electronic circuitry, integrated circuitry, Field Programmable Gate Arrays (FPGAs), Application Specific Integrated Circuits (ASICs), Application Specific Standard Products (ASSPs), system on a chip (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and/or combinations thereof. These various embodiments may include: implemented in one or more computer programs that are executable and/or interpretable on a programmable system including at least one programmable processor, which may be special or general purpose, receiving data and instructions from, and transmitting data and instructions to, a storage system, at least one input device, and at least one output device.

A computer program for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the computer programs, when executed by the processor, cause the functions/acts specified in the flowchart and/or block diagram block or blocks to be performed. A computer program can execute entirely on a machine, partly on a machine, as a stand-alone software package partly on a machine and partly on a remote machine or entirely on a remote machine or server.

In the context of the present invention, a computer-readable storage medium may be a tangible medium that can contain, or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. A computer readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. Alternatively, the computer readable storage medium may be a machine readable signal medium. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

To provide for interaction with a user, the systems and techniques described here can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to a user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which a user can provide input to the electronic device. Other kinds of devices may also be used to provide for interaction with a user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form, including acoustic, speech, or tactile input.

The systems and techniques described here can be implemented in a computing system that includes a back-end component (e.g., as a data server), or that includes a middleware component (e.g., an application server), or that includes a front-end component (e.g., a user computer having a graphical user interface or a web browser through which a user can interact with an implementation of the systems and techniques described here), or any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: local Area Networks (LANs), Wide Area Networks (WANs), blockchain networks, and the internet.

The computing system may include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. The server can be a cloud server, also called a cloud computing server or a cloud host, and is a host product in a cloud computing service system, so that the defects of high management difficulty and weak service expansibility in the traditional physical host and VPS service are overcome.

It should be understood that various forms of the flows shown above may be used, with steps reordered, added, or deleted. For example, the steps described in the present invention may be executed in parallel, sequentially, or in different orders, and are not limited herein as long as the desired results of the technical solution of the present invention can be achieved.

The above-described embodiments should not be construed as limiting the scope of the invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for determining an environmental factor of a NOx model, comprising:

2. The method for determining an environmental factor of a NOx model according to claim 1, wherein determining a plurality of working regions with the standard environmental region point, the high-temperature environmental region point, the plateau alpine-environment region point, and the alpine-environment region point as division boundary points includes:

3. The environmental factor determination method for a NOx model according to claim 2, characterized in that the target operation region is the first operation region or the ninth operation region;

4. The environmental factor determination method for a NOx model according to claim 2, characterized in that the target operation region is the second operation region, the fourth operation region, the sixth operation region, or the eighth operation region;

determining a sixth reference environment correction factor based on the corrected MAP corresponding to the sixth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the sixth reference environment correction factor; or the like, or a combination thereof,

5. The environmental factor determination method for a NOx model according to claim 2, wherein the target operation region is the third operation region, the fifth operation region, or the seventh operation region;

determining a fifth reference environment correction factor based on the temperature parameter and the pressure parameter corresponding to the fifth working area, and calculating an environment factor correction coefficient corresponding to the NOx model according to the fifth reference environment correction factor; or,

6. The environmental factor determination method for a NOx model according to claim 2, characterized in that the target operation region is the tenth operation region, the eleventh operation region, or the twelfth operation region;

7. The method of determining an environmental factor of a NOx model according to claim 1, further comprising:

8. An environmental factor determination device for a NOx model, characterized by comprising:

9. An electronic device, characterized in that the electronic device comprises:

at least one processor; and

a memory communicatively coupled to the at least one processor; wherein,

the memory stores a computer program executable by the at least one processor to enable the at least one processor to perform the method of determining an environmental factor of a NOx model of any one of claims 1 to 7.

10. A computer-readable storage medium storing computer instructions for causing a processor to execute a method for determining an environmental factor of a NOx model according to any one of claims 1 to 7.