Diesel engine economy evaluation method, device and equipment and storage medium

Abstract

The invention discloses a diesel engine economy evaluation method, device and equipment and a storage medium, and the method comprises the steps: formulating different scales, and calculating comprehensive fuel consumption calibration values of different displacements of an engine under different scales based on the relation between the displacement of the engine and fuel consumption; the calculated actual comprehensive fuel consumption of the engine is compared with the comprehensive fuel consumption calibration value, so that the scale interval where the actual comprehensive fuel consumption is located is determined; and performing corresponding economic score calculation based on the scale interval so as to evaluate the economy of the engines with different displacements. According to the method, the economical efficiency of the engines with the same displacement can be objectively evaluated, and a comparison reference can be provided for the expression level of the engines with different displacements in the industry.

Description

Technical Field

[0001] The present invention relates to the technical field of engine evaluation, and in particular to a diesel engine economy evaluation method, device, equipment and storage medium. Background Art

[0002] With the escalation of emission regulations, engine systems have become increasingly complex, and control logic has evolved from the initial open-loop control to the current closed-loop control. This means that the engine system changes combustion parameters and corrects the urea-to-fuel ratio based on real-time emission results to ensure a balance between pollutant emissions and fuel economy. Because the operating state of the engine system constantly changes with actual conditions, a single evaluation metric often cannot truly reflect the engine's economy. Unlike previous evaluations that only focused on fuel consumption, this evaluation system introduces the concept of comprehensive liquid economy. This means that evaluating engine economy requires a comprehensive consideration of the engine system's fuel and urea consumption performance under different conditions. Furthermore, due to thermodynamic principles, engines of different displacements inevitably have different fuel consumption, which interferes with the economic advantages and disadvantages of engines of different displacements.

[0003] Therefore, how to evaluate the economic advantages and disadvantages of engines with different displacements is a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The main purpose of the present invention is to provide a diesel engine economy evaluation method, device, equipment and storage medium, which can not only more objectively evaluate the economy of engines with the same displacement, but also provide a comparative reference for the performance levels of engines with different displacements in the industry.

[0005] In a first aspect, the present application provides a method for evaluating the economy of a diesel engine, wherein the method comprises the steps of:

[0006] Develop different scales and calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales based on the relationship between engine displacement and fuel consumption;

[0007] Comparing the calculated actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption value to determine the scale interval in which the actual comprehensive fuel consumption falls;

[0008] Based on the scale range, the corresponding economy score is calculated to evaluate the economy of engines with different displacements.

[0009] In combination with the first aspect above, as an optional implementation, based on the fuel consumption limit required by the engine, fuel consumption scales for different gears are produced, including: a first gear fuel consumption scale, a second gear fuel consumption scale, and a third gear fuel consumption scale, where the first gear is smaller than the second gear and smaller than the third gear;

[0010] The engine displacement and the corresponding fuel consumption limit are fitted using the least squares method to obtain the functional curve relationship between fuel consumption and displacement at different engine displacements and different scales;

[0011] Based on the function curve relationship, different displacements are input to calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales.

[0012] In combination with the first aspect above, as an optional implementation method, according to the formula: f i =a i *V 2 +b i *V+c i , the function curve relationship between fuel consumption and displacement of different engine displacements at different scales is obtained, where V is the engine displacement, a and b are coefficients, c is a constant, and i is the fuel consumption scale of different gears;

[0013] According to the formula: Calculate the engine's comprehensive fuel consumption calibration value at different scales, where μ is the ratio of the fuel to urea market price, and R is the mass ratio of urea to fuel consumption.

[0014] In combination with the first aspect above, as an optional implementation method, the engine is tested separately to obtain the actual fuel consumption rate and urea consumption rate of the engine;

[0015] Calculating the actual comprehensive fuel consumption of the engine based on the fuel consumption rate and the urea consumption rate;

[0016] Comparing the actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption values of the engine at different scales to determine the scale interval in which the actual comprehensive fuel consumption of the engine lies;

[0017] Among them, the scale interval includes a first scale interval and a second scale interval. The first scale interval is when the comprehensive fuel consumption is between the first and second fuel consumption scales, and the second scale interval is when the comprehensive fuel consumption is between the second and third fuel consumption scales.

[0018] In combination with the first aspect above, as an optional implementation method, the actual comprehensive fuel consumption of the engine is calculated according to the formula: E=F+μU, where F is the actual fuel consumption rate, U is the actual urea consumption rate, and μ is the ratio of fuel to urea market price.

[0019] In combination with the first aspect above, as an optional implementation, if the actual comprehensive fuel consumption of the engine is in the first scale interval, then according to the formula: Calculate the engine economy score, where e1 is the engine's comprehensive fuel consumption at the first fuel consumption scale, e2 is the engine's comprehensive fuel consumption at the second fuel consumption scale, and E is the engine's actual comprehensive fuel consumption;

[0020] If the actual comprehensive fuel consumption of the engine is in the second scale range, according to the formula: Calculate the engine economy score, where e3 is the engine's comprehensive fuel consumption under the third-gear fuel consumption scale.

[0021] In a second aspect, the present application provides a diesel engine economy evaluation device, which includes:

[0022] A processing module, which is used to formulate different scales and calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales based on the relationship between engine displacement and fuel consumption;

[0023] a determination module, configured to compare the calculated actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption value to determine a scale interval in which the actual comprehensive fuel consumption falls;

[0024] The calculation module is used to calculate the corresponding economy score based on the scale interval to evaluate the economy of engines with different displacements.

[0025] In conjunction with the second aspect, as an optional implementation, the processing module is further configured to generate fuel consumption scales for different gears based on a required fuel consumption limit of the engine, the scales comprising: a first gear fuel consumption scale, a second gear fuel consumption scale, and a third gear fuel consumption scale, wherein the first gear is smaller than the second gear and smaller than the third gear;

[0026] The engine displacement and the corresponding fuel consumption limit are fitted using the least squares method to obtain the functional curve relationship between fuel consumption and displacement at different engine displacements and different scales;

[0027] Based on the function curve relationship, different displacements are input to calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales.

[0028] In a third aspect, the present application further provides an electronic device comprising: a processor; and a memory, wherein the memory stores computer-readable instructions, and when the computer-readable instructions are executed by the processor, the method described in any one of the first aspects is implemented.

[0029] In a fourth aspect, the present application further provides a computer-readable storage medium storing computer program instructions, which, when executed by a computer, enables the computer to execute any one of the methods described in the first aspect.

[0030] This application provides a diesel engine economy evaluation method, device, equipment, and storage medium, wherein the method includes the following steps: establishing different scales and, based on the relationship between engine displacement and fuel consumption, calculating the calibrated comprehensive fuel consumption values for engines of different displacements at different scales; comparing the calculated actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption value to determine the scale interval in which the actual comprehensive fuel consumption falls; and calculating the corresponding economy score based on the scale interval to evaluate the economy of engines of different displacements. This application not only enables a relatively objective evaluation of the economy of engines of the same displacement, but also provides a comparative reference for the performance levels of engines of different displacements in the industry.

[0031] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0033] Figure 1 This is a flow chart of a diesel engine economy evaluation method provided in an embodiment of the present application;

[0034] Figure 2 This is a schematic diagram of a diesel engine economy evaluation device provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of an electronic device provided in an embodiment of the present application;

[0036] Figure 4 A schematic diagram of a computer-readable program medium provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0038] Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. Some of the blocks shown in the drawings are functional entities that do not necessarily correspond to physically or logically separate entities.

[0039] The embodiments of the present application are further described in detail below with reference to the accompanying drawings.

[0040] Reference Figure 1 , Figure 1 The figure shows a flow chart of a diesel engine economy evaluation method provided by the present invention. Figure 1 As shown, the method includes the steps of:

[0041] Step S101: Establish different scales, and based on the relationship between engine displacement and fuel consumption, calculate the comprehensive fuel consumption calibration value of engines with different displacements at different scales.

[0042] Specifically, based on the fuel consumption limit required by the engine, fuel consumption scales for different gears are produced, including: a first gear fuel consumption scale, a second gear fuel consumption scale, and a third gear fuel consumption scale, where the first gear is smaller than the second gear and smaller than the third gear;

[0043] The engine displacement and the corresponding fuel consumption limit are fitted using the least squares method to obtain the functional curve relationship between fuel consumption and displacement at different engine displacements and different scales;

[0044] Based on the function curve relationship, different displacements are input to calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales.

[0045] According to the formula: f i =a i *V 2 +b i *V+c i , the function curve relationship between fuel consumption and displacement of different engine displacements at different scales is obtained, where V is the engine displacement, a and b are coefficients, c is a constant, and i is the fuel consumption scale of different gears;

[0046] According to the formula: Calculate the engine's comprehensive fuel consumption calibration value at different scales, where μ is the ratio of the fuel to urea market price, and R is the mass ratio of urea to fuel consumption.

[0047] For ease of understanding, the zero-point scale is established by taking the maximum fuel consumption f required by an engine to meet the fuel consumption limits for heavy-duty commercial vehicles as specified in GB 30510-2018 as zero (0 points). The engine displacement and the corresponding fuel consumption limits are fitted using the least squares method, yielding the following relationship between maximum fuel consumption and displacement:

[0048] f1=a1*V 2 +b1*V+c1

[0049] Then calculate the corresponding liquid economy (liquid including fuel and urea comprehensive economy) (i.e. comprehensive fuel consumption):

[0050]

[0051] Where R is the mass ratio of urea to fuel consumption, V is the engine displacement. Based on actual statistical results, R is set to 0.13, the ratio of fuel to urea market prices, a1 and b1 represent the coefficients of the first gear, and c1 is a constant.

[0052] Passing score: The maximum fuel consumption f required for an engine to meet the fuel consumption limits for heavy-duty commercial vehicles as specified in GB 30510-2024 is used as the passing score (6 points). The engine displacement and the corresponding fuel consumption limit are fitted using the least squares method, resulting in the following relationship between maximum fuel consumption and displacement:

[0053] f2=a2*V 2 +b2*V+c2

[0054] Then calculate the corresponding liquid economy:

[0055]

[0056] The maximum score (10 points) is calculated based on the maximum fuel consumption (f) required for engines meeting the fuel consumption limits for heavy-duty commercial vehicles in 2030, as required by (EU) 2019 / 1242. The engine displacement and the corresponding fuel consumption limits are fitted using the least squares method, yielding the following relationship between maximum fuel consumption and displacement:

[0057] f3=a3*V 2 +b3*V+c3

[0058] Then calculate the corresponding liquid economy:

[0059]

[0060] Optional, zero scale (0): fuel consumption level specified in GB 30510-2018, fuel consumption f i-0 And the comprehensive economy of fuel and urea ij-0 Related to engine displacement:

[0061] f i-0 =a1*V 2 +b1*V+c1

[0062] e i-0 =f i-0 *(1+μ*R)

[0063] Optional, pass scale (3 levels): fuel consumption level specified in GB 30510-202X, fuel consumption f i-3 And the comprehensive economy of fuel and urea ij-3 Related to engine displacement:

[0064] f i-3 =a2*V 2 +b2*V+c2

[0065] e i-3 =f i-3 *(1+μ*R)

[0066] Full scale (5 levels): Based on the fuel consumption level in 2030 as stipulated in (EU) 2019 / 1242, fuel consumption f i-5 And the comprehensive economy of fuel and urea ij-5 Related to engine displacement:

[0067] f i-5 =a3*V 2 +b3*V+c3

[0068] e i-5 =f i-3 *(1+μ*R)

[0069] It needs to be explained that the first, second and third gears represent the fuel economy performance of vehicle emissions at different stages respectively.

[0070] Step S102: Compare the calculated actual comprehensive fuel consumption of the engine with the comprehensive fuel consumption calibration value to determine the scale interval in which the actual comprehensive fuel consumption is located.

[0071] Specifically, the engine is tested individually to obtain the engine's actual fuel consumption rate and urea consumption rate;

[0072] Calculating the actual comprehensive fuel consumption of the engine based on the fuel consumption rate and the urea consumption rate;

[0073] Comparing the actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption values of the engine at different scales to determine the scale interval in which the actual comprehensive fuel consumption of the engine lies;

[0074] Among them, the scale interval includes a first scale interval and a second scale interval. The first scale interval is when the comprehensive fuel consumption is between the first and second fuel consumption scales, and the second scale interval is when the comprehensive fuel consumption is between the second and third fuel consumption scales.

[0075] For ease of understanding, let's take an example. According to GB / T 38146.3-2021, the Chinese automobile driving condition is used as the engine operating cycle. After running two cycles, the test officially begins. The test is continued for three cycles, and the average result is used as the final result. It can be understood that the engine is taken out separately and tested on the bench to obtain the fuel consumption F and urea injection amount U. According to the formula: E=F+μU, the actual comprehensive fuel consumption of the engine (unit: g / kWh) is calculated, where F is the actual fuel consumption rate (unit: g / kWh), U is the actual urea consumption rate (unit: g / kWh), and μ is the ratio of fuel to urea market price.

[0076] Given the engine displacement V, substitute it into formulas e1, e2, and e3 to obtain the zero, passing, and full-mark scale values for the corresponding displacement, respectively.

[0077] For example, if you substitute the engine displacement into formulas e1, e2, and e3, the calculated results are 200g / kWh, 190g / kWh, and 180g / kWh, respectively. This means that a fuel consumption of 200g / kWh is zero points for an engine of this displacement, 190g / kWh is six points, and 180g / kWh is full points. These are all rated fuel consumption values, and engines of different displacements have different rated fuel consumption values.

[0078] After obtaining the calibration value, the engine was tested separately to obtain the actual fuel consumption E. The two values were compared to determine the scale within which the actual fuel consumption falls. For example, if the engine displacement is entered into formulas e1, e2, and e3, the calculated results are 200g / kWh, 190g / kWh, and 180g / kWh, respectively. This means that a comprehensive fuel consumption of 200g / kWh is a zero-point standard for an engine of this displacement, a comprehensive fuel consumption of 190g / kWh is a six-point standard for an engine of this displacement, and a comprehensive fuel consumption of 180g / kWh is a full-point standard for an engine of this displacement. If this engine is run on the China Automotive Driving Cycle, the actual comprehensive fuel consumption E is 195g / kWh. 195 is in the 190-200 range, that is, in the first range, that is, between first and second gears. If the actual fuel consumption is 185, it is in the second range, that is, between 180-190, that is, between second and third gears.

[0079] Step S103: Based on the scale interval, calculate the corresponding economy score to evaluate the economy of engines with different displacements.

[0080] Specifically, if the actual comprehensive fuel consumption of the engine is in the first scale range, according to the formula: Calculate the engine economy score, where e1 is the engine's comprehensive fuel consumption at the first fuel consumption scale, e2 is the engine's comprehensive fuel consumption at the second fuel consumption scale, and E is the engine's actual comprehensive fuel consumption;

[0081] If the actual comprehensive fuel consumption of the engine is in the second scale range, according to the formula: Calculate the engine economy score, where e3 is the engine's comprehensive fuel consumption under the third-gear fuel consumption scale.

[0082] It can be understood that by substituting the engine displacement V into the formulas e1, e2, and e3, the zero, passing, and full score calibration values for the corresponding displacement can be obtained. If E>e2, the economy score G is:

[0083]

[0084] If E≤e2, then the economic score G is:

[0085]

[0086] The higher the economic score G, the better.

[0087] For example, if the actual comprehensive fuel consumption is 195, then it can be understood that E>e2, (e2=190), using the formula Calculate the economy score. If the actual comprehensive fuel consumption is 185, then it can be understood that E≤e2, so the formula is: Calculate the economy score.

[0088] For example: Substitute the engine displacement into formulas e1, e2, and e3, and the calculated results are 200g / kWh, 190g / kWh, and 180g / kWh, respectively. That is, a comprehensive fuel consumption of 200g / kWh is a zero-point standard for an engine with this displacement, a comprehensive fuel consumption of 190g / kWh is a six-point standard for an engine with this displacement, and a comprehensive fuel consumption of 180g / kWh is a full-point standard for an engine with this displacement. Run this engine on the China Automobile Driving Cycle (i.e., officially start the test after running 2 cycles, test 3 cycles continuously, and take the average result as the final result). The actual comprehensive fuel consumption E is 195g / kWh. Refer to the formula The final score was 3 points.

[0089] In summary, the present application can not only more objectively evaluate the economy of engines of the same displacement (i.e., calculate scores), but also provide a comparative reference for the performance levels of engines of different displacements in the industry (i.e., provide different scales).

[0090] Reference Figure 2 , Figure 2 The figure shows a schematic diagram of a diesel engine economy evaluation device provided by the present invention. Figure 2 As shown, the device includes:

[0091] Processing module 201: It is used to formulate different scales and calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales based on the relationship between engine displacement and fuel consumption.

[0092] The determination module 202 is configured to compare the calculated actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption value to determine the scale interval in which the actual comprehensive fuel consumption falls.

[0093] Calculation module 203: It is used to calculate the corresponding economy score based on the scale interval to evaluate the economy of engines with different displacements.

[0094] Furthermore, in a possible embodiment, the processing module is further configured to generate fuel consumption scales for different gears based on the fuel consumption limit required by the engine, the scales comprising: a first gear fuel consumption scale, a second gear fuel consumption scale, and a third gear fuel consumption scale, wherein the first gear is smaller than the second gear and smaller than the third gear;

[0095] The engine displacement and the corresponding fuel consumption limit are fitted using the least squares method to obtain the functional curve relationship between fuel consumption and displacement at different engine displacements and different scales;

[0096] Based on the function curve relationship, different displacements are input to calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales.

[0097] Furthermore, in a possible implementation manner, the calculation module is further configured to calculate the value of f according to the formula: i =a i *V 2 +b i *V+c i , the function curve relationship between fuel consumption and displacement of different engine displacements at different scales is obtained, where V is the engine displacement, a and b are coefficients, c is a constant, and i is the fuel consumption scale of different gears;

[0098] According to the formula: Calculate the engine's comprehensive fuel consumption calibration value at different scales, where μ is the ratio of the fuel to urea market price, and R is the mass ratio of urea to fuel consumption.

[0099] Furthermore, in a possible implementation, the determination module is further configured to perform a separate test on the engine to obtain the actual fuel consumption rate and urea consumption rate of the engine;

[0100] Calculating the actual comprehensive fuel consumption of the engine based on the fuel consumption rate and the urea consumption rate;

[0101] Comparing the actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption values of the engine at different scales to determine the scale interval in which the actual comprehensive fuel consumption of the engine lies;

[0102] Among them, the scale interval includes a first scale interval and a second scale interval. The first scale interval is when the comprehensive fuel consumption is between the first and second fuel consumption scales, and the second scale interval is when the comprehensive fuel consumption is between the second and third fuel consumption scales.

[0103] Furthermore, in a possible implementation, the calculation module is also used to calculate the actual comprehensive fuel consumption of the engine according to the formula: E=F+μU, wherein F is the actual fuel consumption rate, U is the actual urea consumption rate, and μ is the ratio of fuel to urea market price.

[0104] Furthermore, in a possible implementation, the calculation module is further configured to calculate, if the actual comprehensive fuel consumption of the engine is in the first scale interval, according to the formula: Calculate the engine economy score, where e1 is the engine's comprehensive fuel consumption at the first fuel consumption scale, e2 is the engine's comprehensive fuel consumption at the second fuel consumption scale, and E is the engine's actual comprehensive fuel consumption;

[0105] If the actual comprehensive fuel consumption of the engine is in the second scale range, according to the formula: Calculate the engine economy score, where e3 is the engine's comprehensive fuel consumption under the third-gear fuel consumption scale.

[0106] Refer to the following Figure 3 The electronic device 300 according to this embodiment of the present invention will be described. Figure 3 The electronic device 300 shown is merely an example and should not limit the functions and scope of use of the embodiments of the present invention.

[0107] like Figure 3 As shown, electronic device 300 is implemented as a general-purpose computing device. Components of electronic device 300 may include, but are not limited to, the aforementioned at least one processing unit 310, the aforementioned at least one storage unit 320, and a bus 330 connecting various system components (including storage unit 320 and processing unit 310).

[0108] The storage unit stores program codes, which can be executed by the processing unit 310, so that the processing unit 310 performs the steps according to various exemplary embodiments of the present invention described in the above “Example Method” section of this specification.

[0109] The storage unit 320 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 321 and / or a cache memory unit 322 , and may further include a read-only memory unit (ROM) 323 .

[0110] The storage unit 320 may also include a program / utility 324 having a set (at least one) of program modules 325, such program modules 325 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0111] Bus 330 may represent one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0112] The electronic device 300 can also communicate with one or more external devices (e.g., a keyboard, a pointing device, a Bluetooth device, etc.), one or more devices that enable a user to interact with the electronic device 300, and / or any device that enables the electronic device 300 to communicate with one or more other computing devices (e.g., a router, a modem, etc.). Such communication can occur via an input / output (I / O) interface 350. Furthermore, the electronic device 300 can also communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network such as the Internet) via a network adapter 360. As shown, the network adapter 360 communicates with other modules of the electronic device 300 via a bus 330. It should be understood that, although not shown in the figure, other hardware and / or software modules can be used in conjunction with the electronic device 300, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0113] Through the description of the above embodiments, it is easy for those skilled in the art to understand that the example embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.

[0114] According to the solution of the present disclosure, a computer-readable storage medium is also provided, on which a program product capable of implementing the above-mentioned method of this specification is stored. In some possible implementations, various aspects of the present invention may also be implemented in the form of a program product, which includes program code. When the program product is executed on a terminal device, the program code is used to cause the terminal device to perform the steps according to various exemplary embodiments of the present invention described in the "Exemplary Methods" section of this specification.

[0115] refer to Figure 4 As shown, a program product 400 for implementing the above method according to an embodiment of the present invention is described. The program product 400 may be a portable compact disc read-only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited thereto. In this document, a readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0116] The program product may be implemented in any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, 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 disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0117] A computer-readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, which carries readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium that can transmit, propagate, or transfer a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0118] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0119] The program code for performing the operations of the present invention may be written in any combination of one or more programming languages, including object-oriented programming languages such as Java, C++, and the like, as well as conventional procedural programming languages such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a stand-alone software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In cases involving a remote computing device, the remote computing device may be connected to the user computing device via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., via the Internet using an Internet service provider).

[0120] Furthermore, the above-described figures are merely illustrative of the processes included in the method according to exemplary embodiments of the present invention and are not intended to be limiting. It is readily understood that the processes illustrated in the above-described figures do not indicate or limit the temporal order of these processes. Furthermore, it is readily understood that these processes may be executed synchronously or asynchronously, for example, in multiple modules.

[0121] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

[0122] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

Claims

1. A diesel engine economy evaluation method, characterized in that: include: Develop different scales and calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales based on the relationship between engine displacement and fuel consumption; Comparing the calculated actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption value to determine the scale interval in which the actual comprehensive fuel consumption falls; Based on the scale range, the corresponding economy score is calculated to evaluate the economy of engines with different displacements.

2. The method according to claim 1, characterized in that The different scales are formulated, and based on the relationship between engine displacement and fuel consumption, the comprehensive fuel consumption calibration values of engines with different displacements at different scales are calculated, including: Based on the fuel consumption limit required by the engine, fuel consumption scales for different gears are produced, including: a first gear fuel consumption scale, a second gear fuel consumption scale, and a third gear fuel consumption scale, where the first gear is smaller than the second gear and smaller than the third gear; The engine displacement and the corresponding fuel consumption limit are fitted using the least squares method to obtain the functional curve relationship between fuel consumption and displacement at different engine displacements and different scales; Based on the function curve relationship, different displacements are input to calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales.

3. The method according to claim 2, characterized in that include: According to the formula: f i =a i *V 2 +b i *V+c i , the function curve relationship between fuel consumption and displacement of different engine displacements at different scales is obtained, where V is the engine displacement, a and b are coefficients, c is a constant, and i is the fuel consumption scale of different gears; According to the formula: Calculate the engine's comprehensive fuel consumption calibration value at different scales, where μ is the ratio of the fuel to urea market price, and R is the mass ratio of urea to fuel consumption.

4. The method according to claim 1, wherein The step of comparing the calculated actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption value to determine the scale interval in which the actual comprehensive fuel consumption falls includes: Conduct individual engine tests to obtain the actual fuel consumption and urea consumption of the engine; Calculating the actual comprehensive fuel consumption of the engine based on the fuel consumption rate and the urea consumption rate; Comparing the actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption values of the engine at different scales to determine the scale interval in which the actual comprehensive fuel consumption of the engine lies; Among them, the scale interval includes a first scale interval and a second scale interval. The first scale interval is when the comprehensive fuel consumption is between the first and second fuel consumption scales, and the second scale interval is when the comprehensive fuel consumption is between the second and third fuel consumption scales.

5. The method according to claim 4, characterized in that include: The actual comprehensive fuel consumption of the engine is calculated according to the formula: E=F+μU, where F is the actual fuel consumption rate, U is the actual urea consumption rate, and μ is the ratio of fuel to urea market price.

6. The method according to claim 1, characterized in that The economic efficiency score calculation based on the scale interval includes: If the actual comprehensive fuel consumption of the engine is in the first scale range, then according to the formula: Calculate the engine economy score, where e1 is the engine's comprehensive fuel consumption at the first fuel consumption scale, e2 is the engine's comprehensive fuel consumption at the second fuel consumption scale, and E is the engine's actual comprehensive fuel consumption; If the actual comprehensive fuel consumption of the engine is in the second scale range, according to the formula: Calculate the engine economy score, where e3 is the engine's comprehensive fuel consumption under the third-gear fuel consumption scale.

7. A diesel engine economy evaluation device, characterized in that: include: A processing module, which is used to formulate different scales and calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales based on the relationship between engine displacement and fuel consumption; a determination module, configured to compare the calculated actual comprehensive fuel consumption of the engine with the calibrated comprehensive fuel consumption value to determine a scale interval in which the actual comprehensive fuel consumption falls; The calculation module is used to calculate the corresponding economy score based on the scale interval to evaluate the economy of engines with different displacements.

8. The device according to claim 7, characterized in that include: The processing module is further configured to generate fuel consumption scales for different gears based on the fuel consumption limit required by the engine, including: a first gear fuel consumption scale, a second gear fuel consumption scale, and a third gear fuel consumption scale, wherein the first gear is smaller than the second gear and smaller than the third gear; The engine displacement and the corresponding fuel consumption limit are fitted using the least squares method to obtain the functional curve relationship between fuel consumption and displacement at different engine displacements and different scales; Based on the function curve relationship, different displacements are input to calculate the comprehensive fuel consumption calibration values of engines with different displacements at different scales.

9. An electronic device, characterized in that: The electronic device comprises: processor; A memory having computer-readable instructions stored thereon, wherein when the computer-readable instructions are executed by the processor, the method according to any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium, characterized in that The computer program instructions are stored therein, and when the computer program instructions are executed by a computer, the computer is caused to execute the method according to any one of claims 1 to 6.

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