Engine cost economy evaluation system

Abstract

The invention relates to an engine cost economy evaluation system. The system comprises an engine power efficiency evaluation module used for evaluating the cost efficiency of the actual output power of an engine, an engine displacement efficiency evaluation module used for evaluating the cost efficiency of the engine displacement, and an engine value efficiency evaluation module used for evaluating the cost efficiency of the engine value. The engine price efficiency evaluation module is used for evaluating the cost efficiency of the engine price; the engine cost efficiency evaluation module is used for evaluating engine comprehensive cost efficiency obtained by integrating evaluation results of the engine power efficiency evaluation module, the engine displacement efficiency evaluation module, the engine value efficiency evaluation module and the engine price efficiency evaluation module. The method systematically and quantitatively reflects the evaluation standards of the cost characteristics and the cost economy of the engine, and realizes quantitative and standardized analysis of the cost economy of the engine.

Description

Technical Field

[0001] The invention relates to the technical field of economics of cost evaluation in an engine evaluation system, and in particular to an engine cost economy evaluation system. Background Art

[0002] As an important part of the vehicle, the various indicators of the engine are proposed based on the needs of the vehicle, so the various indicators of the engine must meet the requirements of the vehicle. In the engine evaluation system, there is a set of mature evaluation indicators such as power, economy, emissions, reliability and operability. When the vehicle is selecting engines and promoting them in the market, the cost competitiveness of the engine is a very important aspect. In some applications that are sensitive to cost requirements, it is even a decisive factor. It plays a key role in the successful matching, promotion and application of the engine and the increase of market share. Since the engine cost is closely related to engine technology, business, engine and vehicle matching, and actual application, there is currently no evaluation method and indicator in this regard.

[0003] Since the existing technology does not have an evaluation system for the comprehensive cost of the engine, it is difficult to evaluate the cost competitiveness of the engine when selecting the engine for the whole vehicle and promoting it in the market. Summary of the invention

[0004] In view of the above problems, the present invention provides an engine cost-economy evaluation system, which aims to systematically and quantitatively reflect the engine cost characteristics and cost-economy evaluation standards, and realize quantitative and standardized analysis of engine cost-economy.

[0005] To solve the above problems, the technical solution provided by the present invention is:

[0006] The engine cost economy evaluation system includes an engine power efficiency evaluation module, an engine displacement efficiency evaluation module, an engine value efficiency evaluation module, an engine price efficiency evaluation module, and an engine cost efficiency evaluation module, wherein:

[0007] The engine power efficiency evaluation module is used to evaluate the cost efficiency of the actual output power of the engine;

[0008] The engine displacement efficiency evaluation module is used to evaluate the cost efficiency of the engine displacement;

[0009] The engine value efficiency evaluation module is used to evaluate the cost efficiency of the engine value;

[0010] The engine price efficiency evaluation module is used to evaluate the cost efficiency of the engine price;

[0011] The engine cost efficiency evaluation module is used to evaluate the comprehensive cost efficiency of the engine obtained by integrating the evaluation results of the engine power efficiency evaluation module, the engine displacement efficiency evaluation module, the engine value efficiency evaluation module, and the engine price efficiency evaluation module.

[0012] It includes engine load rate evaluation module, engine power evaluation module, engine cost evaluation module, engine price coefficient evaluation module and engine cost ratio evaluation module, among which:

[0013] The engine load rate evaluation module is used to evaluate the relative displacement utilization rate of the engine;

[0014] The engine specific power evaluation module is used to evaluate the theoretical displacement utilization rate of the engine;

[0015] The engine cost-to-escalation evaluation module is used to evaluate the engine cost-to-escalation;

[0016] The engine price coefficient evaluation module is used to evaluate the price coefficient of the engine;

[0017] The engine specific cost evaluation module is used to evaluate the engine specific cost obtained by integrating the evaluation results of the engine load rate evaluation module, the engine power evaluation module, the engine cost evaluation module, and the engine price coefficient evaluation module.

[0018] Preferably, the comprehensive cost efficiency of the engine is expressed as follows:

[0019] η c =η1η2η3η4

[0020] Where: η c Used to characterize the comprehensive cost efficiency of the engine; η1 is used to characterize the engine price efficiency evaluation index calculated in the engine price efficiency evaluation module; η2 is used to characterize the engine value efficiency evaluation index calculated in the engine value efficiency evaluation module; η3 is used to characterize the engine displacement efficiency evaluation index calculated in the engine displacement efficiency evaluation module; η4 is used to characterize the engine power efficiency evaluation index calculated in the engine power efficiency evaluation module.

[0021] Preferably, the engine price efficiency evaluation index is the ratio of engine value to engine price, expressed as follows:

[0022]

[0023] C1=k p C0

[0024] Where: C0 is used to represent the value of the engine; C1 is used to represent the price of the engine; k p Used to represent price coefficient.

[0025] Preferably, the engine value efficiency evaluation index is the ratio of the engine displacement to the engine value, expressed as follows:

[0026]

[0027] Where: V h Used to characterize the engine displacement.

[0028] Preferably, the engine displacement efficiency evaluation index is the ratio of the maximum rated power of the engine to the engine displacement, expressed as follows:

[0029]

[0030] Where: N e Used to characterize the maximum rated power of the engine.

[0031] Preferably, the maximum rated power of the engine is expressed as follows:

[0032]

[0033]

[0034] Where: n n Used to characterize the rated speed of the engine; T tq Used to characterize the rated torque of the engine; P me Used to characterize the mean effective pressure; k t Used to characterize the engine technical condition coefficient.

[0035] Preferably, the engine power efficiency evaluation index is the ratio of the actual applied average power of the engine to the maximum rated power of the engine, expressed as follows:

[0036]

[0037] Where: N e 'It is used to characterize the actual applied average power of the engine.

[0038] Preferably, the actual applied average power of the engine is expressed as follows:

[0039]

[0040] Where: W act It is used to characterize the actual application cycle work of the engine; T is used to characterize the cycle operating time.

[0041] Preferably, the load rate is expressed as follows:

[0042]

[0043] Where: λ is used to characterize the load rate; N e Used to represent the maximum rated power of the engine; N e 'Used to characterize the actual applied average power of the engine;

[0044] The specific power is expressed as follows:

[0045]

[0046] Where: N l Used to characterize the specific power; V h Used to characterize the displacement of the engine;

[0047] The incremental cost is expressed as follows:

[0048]

[0049] Where: k v Used to represent the liter cost; C0 is used to represent the engine value;

[0050] The price coefficient is expressed as follows:

[0051]

[0052] Where: k p Used to characterize the price coefficient; C1 is used to characterize the engine price;

[0053] The engine specific cost is expressed as follows:

[0054]

[0055] Where: n n Used to characterize the rated speed of the engine; k t Used to characterize the engine technical condition coefficient.

[0056] Compared with the prior art, the present invention has the following advantages:

[0057] 1. Since the present invention systematically analyzes the factors affecting the cost competitiveness of the engine from the perspective of engine and vehicle selection, matching and application, and proposes equivalent displacement, theoretical displacement utilization, relative displacement utilization, actual displacement utilization, cost efficiency and four conversion efficiencies, it systematically and quantitatively reflects the evaluation criteria of engine cost characteristics and cost economy.

[0058] 2. Since the present invention provides definitions and indicators that characterize engine cost-effectiveness and constructs a set of engine cost-effectiveness evaluation systems and methods, the engine cost-effectiveness can be quantitatively and standardizedly analyzed. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 A schematic diagram of cost factors of rated power of a specific embodiment of the present invention;

[0060] Figure 2 It is a schematic diagram of λ under the condition of constant displacement in a specific embodiment of the present invention;

[0061] Figure 3 It is a schematic diagram of λ under the condition of displacement change in a specific embodiment of the present invention;

[0062] Figure 4 A schematic diagram of actual engine displacement utilization rate according to a specific embodiment of the present invention;

[0063] Figure 5 It is a schematic diagram of a flow chart of cost efficiency and process conversion efficiency of a specific embodiment of the present invention. DETAILED DESCRIPTION

[0064] The present invention is further explained below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0065] The engine cost economy evaluation system includes an engine power efficiency evaluation module, an engine displacement efficiency evaluation module, an engine value efficiency evaluation module, an engine price efficiency evaluation module, and an engine cost efficiency evaluation module, wherein:

[0066] The engine power efficiency evaluation module is used to evaluate the cost efficiency of the actual engine output power.

[0067] The engine displacement efficiency evaluation module is used to evaluate the cost efficiency of engine displacement.

[0068] The engine value efficiency evaluation module is used to evaluate the cost efficiency of engine value.

[0069] The engine price efficiency evaluation module is used to evaluate the cost efficiency of the engine price.

[0070] The engine cost efficiency evaluation module is used to evaluate the comprehensive cost efficiency of the engine obtained by integrating the evaluation results of the engine power efficiency evaluation module, the engine displacement efficiency evaluation module, the engine value efficiency evaluation module, and the engine price efficiency evaluation module.

[0071] It should be noted that in the matching of engines and complete vehicles, while meeting the conditions of power, economy, emissions, etc., the engine cost and its role in each link of the complete vehicle matching jointly determine its matching economy. It includes platform selection, power determination, application scenarios and the cost of the engine itself, reflecting the combined effect of technical cost and business cost.

[0072] It should be noted that the comprehensive cost efficiency of the engine is expressed as follows:

[0073] η c =η1η2η3η4 (1)

[0074] Where: η c Used to characterize the comprehensive cost efficiency of the engine; η1 is used to characterize the engine price efficiency evaluation index calculated in the engine price efficiency evaluation module; η2 is used to characterize the engine value efficiency evaluation index calculated in the engine value efficiency evaluation module; η3 is used to characterize the engine displacement efficiency evaluation index calculated in the engine displacement efficiency evaluation module; η4 is used to characterize the engine power efficiency evaluation index calculated in the engine power efficiency evaluation module.

[0075] It should be further explained that η1 is the value obtained per unit price; η2 is the displacement obtained per unit value, in L / yuan; η3 is the power obtained per unit displacement, indicating the theoretical displacement utilization rate, in kW / L; η4 is the actual output power under unit rated power conditions, indicating the relative displacement utilization rate, reflecting the cost efficiency in engine applications; η c It represents the actual average power of the engine obtained by unit cost input. c It reflects the comprehensive cost efficiency of engine selection, matching and actual application. Obviously, the higher the engine cost efficiency, the stronger the engine cost competitiveness.

[0076] It needs to be further explained that if Figure 5 As shown in Figure 1, the cost input in engine matching to the final output of actual application, the cost "value flow" has undergone a four-stage conversion process, and there are four conversion efficiencies. It can be seen that to evaluate the engine cost efficiency η c , it is necessary to evaluate each conversion efficiency; to improve the engine cost efficiency η c , it is necessary to improve the efficiency of each conversion.

[0077] It should be noted that the engine price efficiency evaluation index is the ratio of engine value to engine price, expressed as formula 2 and 3:

[0078]

[0079] C1=k p C0 (3)

[0080] Among them: C0 is used to represent the value of the engine; C1 is used to represent the price of the engine; k p Used to represent price coefficient.

[0081] It should be further explained that the price of the engine directly affects the cost competitiveness. Value is the basis of price, and the price is determined by value and fluctuates around value. The engine value is a relatively stable product value related to the engine technical conditions and displacement, and is an evaluation value under certain conditions. Specifically, the engine value is an engine guide price evaluated based on the full cost of the engine, comprehensive basic profit, engine brand and other factors. When the technical conditions are constant, C0 increases with the increase of displacement; k p is the ratio of price to value, which is related to business strategy, etc. p It is not a fixed proportional coefficient, but takes a certain range of values. The reason is that due to the fluctuation of C1, only when C1 and C0 are determined, the engine price coefficient k p It's confirmed.

[0082] It should be noted that the engine value efficiency evaluation index is the ratio of engine displacement to engine value, expressed as formula 4:

[0083]

[0084] Where: V h Used to characterize engine displacement.

[0085] It should be further explained that the engine cost per liter is the ratio of the engine value to the displacement, and the unit is yuan / liter. The engine cost per liter represents the value per unit displacement. Its meaning is to convert the value determined by technology and performance according to the engine characteristic parameter displacement, linking technology with business, and is a relative cost parameter of the technical and economic efficiency of the engine itself. The engine cost per liter is expressed as formula 5:

[0086]

[0087] Where: k v Used to characterize the engine's liter cost.

[0088] It should be further explained that the engine price per liter is expressed as follows:

[0089]

[0090] Where: k L Used to represent the price per liter of engine.

[0091] It should be noted that the engine displacement efficiency evaluation index is the ratio of the maximum rated power of the engine to the engine displacement, expressed as formula 7:

[0092]

[0093] Where: N e Used to characterize the maximum rated power of an engine.

[0094] It should be further explained that the maximum rated power of the engine is expressed by formulas 8, 9, and 10:

[0095]

[0096] Where: n n Used to characterize the rated speed of the engine; T tq Used to characterize the rated torque of the engine; P me Used to characterize the mean effective pressure; k t Used to characterize the engine technical condition coefficient.

[0097] It needs to be further explained that engine displacement and power are important factors affecting cost. Displacement limits gas volume and engine power. Generally, engine development is to develop a series of products based on displacement, and each engine platform is named after the displacement characteristics. In engine platform development, although the engine displacement is theoretically continuous and infinite, it is impossible for an engine to correspond to one displacement for one application. In fact, it is distributed in steps. The same power can have engines of different displacements to meet different application requirements. Under certain technical conditions, the larger the engine displacement, the higher the cost. Engines with the same displacement can also develop a series of engine products with different horsepower ranges. After selecting an engine platform at a certain power, it is often used in different applications and produces different application road spectra. In engine vehicle matching, it is necessary to select an engine with a suitable displacement based on power.

[0098] In this specific embodiment, the P of the supercharged diesel engine of the truck is me The value range is 1000kP a ~1300kP a ; Under certain technical conditions, engine power and torque are related to displacement V h Directly proportional.

[0099] like Figure 1 As shown, it needs to be further explained that the work of the engine is to convert the energy of fuel under a certain displacement to generate power. Under a certain power, the vehicle selects the engine operating point according to different control (gear and throttle) requirements to obtain different speeds and torques; and the torque is proportional to the displacement, that is, under certain technical conditions, N e Can be decomposed into n n and V h Two factors, V h Closely related to engine cost; when N eWhen n n If V h Decreases, the comprehensive cost decreases; and when P me When k increases t Rising, in n n Under certain conditions, V h Decrease, comprehensive cost decreases.

[0100] It should be further explained that under the condition of certain power, the higher the rated speed of the engine, the lower the displacement and the lower the cost. In vehicle matching, the appropriate engine displacement and speed can be selected according to the purpose of the car. In engine vehicle matching, the engine rated power must first be determined based on the maximum vehicle speed, and then the engine displacement of the appropriate platform must be selected based on the power. When selecting the displacement, the rated speed must be determined first to control the displacement and cost. This is the importance of the rated speed affecting the cost.

[0101] It needs to be further explained that the output of displacement is power, and liter power is the power per unit displacement, so liter power represents the engine displacement utilization rate. An increase in liter power means a smaller displacement at a certain power, or a larger power at a certain displacement. The rated power of the engine is generally used to calculate liter power, and it can be used as a theoretical displacement utilization rate in the cost analysis of the engine. It can be seen that liter power is not only an engine enhancement indicator, but also a cost-economic indicator. Liter power is an important economic and technical indicator of the engine. Liter power is expressed by formula 11:

[0102]

[0103] Where: N l Used to characterize power per liter.

[0104] It should be further explained that the rated engine speed n n Ascent and mean effective pressure P me If the power increases, N l rise.

[0105] It should be noted that the engine power efficiency evaluation index is the ratio of the actual average power of the engine to the maximum rated power of the engine, expressed as formula 12:

[0106]

[0107] Where: N e 'Used to characterize the actual average power of the engine.

[0108] It should be further explained that the actual average power of the engine is expressed by formula 13:

[0109]

[0110] Where: W act It is used to characterize the actual application cycle work of the engine; T is used to characterize the cycle operating time.

[0111] It should be further explained that W act The value is equal to the instantaneous power time integral of each operating point. The cycle operating time is T, and the average cycle power of the engine can be obtained.

[0112] It should be further explained that the general engine displacement is designed based on the power required by a certain major application market. However, after the engine displacement is finalized, it faces different application scenarios, such as tractors, trucks, buses, sanitation vehicles, etc. Different applications have different average engine application load rates under different application conditions. The engine application load rate is the engine power efficiency evaluation index, so the engine application load rate represents different applications, expressed by formulas 14 and 15:

[0113]

[0114]

[0115] Among them: λ is used to characterize the engine application load rate; V d Used to characterize the equivalent displacement of an engine calculated by dividing the cycle power by the rated speed.

[0116] It should be further explained that the engine application is the average power N obtained by the engine actual application under mixed operating conditions including common operating conditions. e ', it is the average power weighted by time under different working conditions, so it contains comprehensive information of each working condition, but it is mainly determined by the common working condition. From the application characteristics, λ represents the degree of deviation between the common working condition and the rated working condition. From the cost analysis, λ represents the application displacement utilization rate, which can be defined as the relative displacement utilization rate. When the relative displacement utilization rate of the engine's common working condition increases, the comprehensive cost decreases.

[0117] It needs to be further explained that if Figure 2 As shown in the figure, when the power and displacement are constant, the calculation method of λ is: Generally, when determining the displacement of the engine platform, the highest horsepower model is developed first, and then the power is reduced to develop engine series models of different horsepower ranges. When calculating λ, N e Take the rated power of the highest horsepower model, that is, the maximum rated power of the displacement. Under the low horsepower model, the calculation of λ can be divided into two parts, expressed by formulas 16, 17, and 18:

[0118]

[0119] Among them: λ1 is used to characterize the load rate of low horsepower models; λ2 is used to characterize the ratio of rated power to maximum rated power of low horsepower models; N e1 Used to characterize the rated power of low horsepower models.

[0120] Therefore, calculate the load rate of the engine in actual application. Whether it is the highest horsepower model or the low horsepower model, its N e The maximum rated power under the displacement is taken, and the engine equivalent displacement is expressed as formula 19:

[0121]

[0122] Where: V d Used to characterize the engine equivalent displacement.

[0123] It needs to be further explained that if Figure 3 As shown, N e Two engines with displacement V h Different, where the first engine displacement V h1 Greater than the second engine displacement V h2 ; Due to displacement V h Decreases, then the engine power N l The increase indicates that the theoretical displacement utilization rate increases; due to N e ' is unchanged, so λ is unchanged, and λ represents the degree of deviation between the common working condition and the rated working condition. At this time, N e Certainly, when V h Decrease, engine power N l As λ increases, the theoretical displacement utilization rate increases, and λ represents the relative displacement utilization rate.

[0124] It needs to be further explained that if Figure 4 As shown, the actual engine displacement utilization rate is expressed by formula 20:

[0125]

[0126] Where: N l It is used to characterize the specific power; λ is used to characterize the engine application load rate.

[0127] It should be further explained that N l is the power output rate of a certain displacement, and its value has a comparative significance for different engines. λ is a reflection of the actual application characteristics. If the application is certain, then λ is certain, and N l ' represents the actual displacement utilization of the engine. It can be seen that the power per liter is not only an indicator of the degree of engine enhancement, but also an indicator of the cost economy of the engine. For practical applications, N lis a constant, and λ has different values ​​for different applications. For example, if λ is too low, the match between the engine and the vehicle will be like "a big horse pulling a small cart", which will not only have poor fuel economy but also low engine cost economy. Therefore, λ must take an appropriate value while satisfying the power performance, and the load rate of common working conditions must be increased to obtain good engine cost economy.

[0128] It should be noted that the engine cost economy evaluation system of the present invention further includes an engine load rate evaluation module, an engine power evaluation module, an engine cost evaluation module, an engine price coefficient evaluation module, and an engine specific cost evaluation module, wherein:

[0129] The engine load rate evaluation module is used to evaluate the relative displacement utilization of the engine;

[0130] The engine power per liter evaluation module is used to evaluate the theoretical displacement utilization of the engine;

[0131] The engine cost evaluation module is used to evaluate the engine cost;

[0132] The engine price coefficient evaluation module is used to evaluate the price coefficient of the engine;

[0133] The engine specific cost evaluation module is used to evaluate the engine specific cost obtained by integrating the evaluation results of the engine load rate evaluation module, the engine power evaluation module, the engine cost evaluation module, and the engine price coefficient evaluation module.

[0134] It should be further explained that the engine specific cost can be obtained based on the above modules and indicators; the engine specific cost is defined as the ratio of the engine price to the average power actually used by the engine, which is also equal to 1 / λ of the unit rated power cost. The engine specific cost is an indicator of cost economy, expressed by formulas 21 and 22:

[0135]

[0136] Among them: C is used to characterize the engine specific cost.

[0137] It should be further explained that the engine specific cost is affected by six main parameters. p When other parameters change, the cost can also be adjusted by taking values ​​within a certain range, so the parameters can be divided into the following two situations:

[0138] 1. In k p When the value is fixed, the impact of changes in other parameters on the cost is as follows:

[0139] As λ increases, the engine specific cost decreases and the engine cost economy increases.

[0140] n n Rising, V under a certain powerh drops, and V h If it is strongly correlated with cost, C0 will decrease, so the engine cost ratio will decrease and the engine cost economy will increase.

[0141] N e Certainly, when V h When the technical conditions are constant, C0 decreases. At this time, the denominator remains unchanged and the numerator decreases, then the engine cost ratio decreases and the engine cost economy increases.

[0142] When the engine price C1 decreases, the engine specific cost decreases and the engine cost economy increases.

[0143] P me Rise, n n Under certain conditions, V h If it decreases, C0 decreases, so the engine specific cost decreases and the engine cost economy increases.

[0144] 2. In k p When the values ​​are within a certain range, the engine specific cost C of the impact of changes in other parameters on the cost is expressed by formula 23:

[0145]

[0146] It should be noted that the engine cost economy evaluation system includes a cost efficiency evaluation method and a relative cost evaluation method, wherein the cost efficiency evaluation method specifically includes the following implementation steps:

[0147] Sa100. Obtain and record the basic structure and performance parameters of the engine, including: engine rated power, engine rated speed, engine displacement, engine price, and engine value.

[0148] Sa200. Evaluate the engine power efficiency and calculate the engine power efficiency evaluation index η4.

[0149] Sa300. Evaluate the engine displacement efficiency and calculate the engine displacement efficiency evaluation index η3.

[0150] Sa400. Evaluate the engine value efficiency and calculate the engine value efficiency evaluation index η2.

[0151] Sa500. Carry out engine price efficiency evaluation and calculate the engine price efficiency evaluation index η1.

[0152] Sa600.Evaluate the engine cost efficiency, calculate the comprehensive cost efficiency of the engine, and record the results in Table 1.

[0153] Table 1. Engine comprehensive cost efficiency evaluation results record

[0154]

[0155]

[0156] It should be noted that the comparative cost evaluation method includes the following implementation steps:

[0157] Sb100. Obtain and record the basic structure and performance parameters of the engine, including: engine rated power, engine rated speed, engine displacement, engine price, and engine value.

[0158] Sb200. Evaluate the relative displacement utilization of the engine and calculate the load factor λ.

[0159] Sb300. Evaluate the utilization rate of the theoretical displacement of the engine and calculate the power per liter N l .

[0160] Sb400. Evaluate the engine cost per liter and calculate the cost per liter k v .

[0161] Sb500. Evaluate the engine price coefficient and calculate the price coefficient k p .

[0162] Sb600. Evaluate the engine specific cost, calculate the engine specific cost, and record the results in Table 2.

[0163] Table 2. Engine specific cost evaluation result record

[0164]

[0165]

[0166] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0167] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined herein may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0168] The above description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0169] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An engine cost-effectiveness evaluation system, characterized in that: It includes engine power efficiency evaluation module, engine displacement efficiency evaluation module, engine value efficiency evaluation module, engine price efficiency evaluation module, and engine cost efficiency evaluation module, among which: The engine power efficiency evaluation module is used to evaluate the cost efficiency of the actual output power of the engine; The engine displacement efficiency evaluation module is used to evaluate the cost efficiency of the engine displacement; The engine value efficiency evaluation module is used to evaluate the cost efficiency of the engine value; The engine price efficiency evaluation module is used to evaluate the cost efficiency of the engine price; The engine cost efficiency evaluation module is used to evaluate the comprehensive cost efficiency of the engine obtained by integrating the evaluation results of the engine power efficiency evaluation module, the engine displacement efficiency evaluation module, the engine value efficiency evaluation module, and the engine price efficiency evaluation module.

2. The engine cost-effectiveness evaluation system according to claim 1, characterized in that: It includes engine load rate evaluation module, engine power evaluation module, engine cost evaluation module, engine price coefficient evaluation module and engine cost ratio evaluation module, among which: The engine load rate evaluation module is used to evaluate the relative displacement utilization rate of the engine; The engine specific power evaluation module is used to evaluate the theoretical displacement utilization rate of the engine; The engine cost-to-escalation evaluation module is used to evaluate the engine cost-to-escalation; The engine price coefficient evaluation module is used to evaluate the price coefficient of the engine; The engine specific cost evaluation module is used to evaluate the engine specific cost obtained by integrating the evaluation results of the engine load rate evaluation module, the engine power evaluation module, the engine cost evaluation module, and the engine price coefficient evaluation module.

3. The engine cost-effectiveness evaluation system according to claim 2, characterized in that: The comprehensive cost efficiency of the engine is expressed as follows: or c =η1η2η3η4 in; η c Used to characterize the comprehensive cost efficiency of the engine; η1 is used to characterize the engine price efficiency evaluation index calculated in the engine price efficiency evaluation module; η2 is used to characterize the engine value efficiency evaluation index calculated in the engine value efficiency evaluation module; η3 is used to characterize the engine displacement efficiency evaluation index calculated in the engine displacement efficiency evaluation module; η4 is used to characterize the engine power efficiency evaluation index calculated in the engine power efficiency evaluation module.

4. The engine cost-effectiveness evaluation system according to claim 3, characterized in that: The engine price efficiency evaluation index is the ratio of engine value to engine price, expressed as follows: C1=k p C0 Where: C0 is used to represent the value of the engine; C1 is used to represent the price of the engine; k p Used to characterize the price coefficient.

5. The engine cost-effectiveness evaluation system according to claim 4, characterized in that: The engine value efficiency evaluation index is the ratio of the engine displacement to the engine value, expressed as follows: Where: V h Used to characterize the engine displacement.

6. The engine cost-effectiveness evaluation system according to claim 5, characterized in that: The engine displacement efficiency evaluation index is the ratio of the maximum rated power of the engine to the engine displacement, expressed as follows: Where: N e Used to characterize the maximum rated power of the engine.

7. The engine cost-effectiveness evaluation system according to claim 6, characterized in that: The maximum rated power of the engine is expressed as follows: Where: n n Used to characterize the rated speed of the engine; T tq Used to characterize the rated torque of the engine; P me Used to characterize the mean effective pressure; k t Used to characterize the engine technical condition coefficient.

8. The engine cost-effectiveness evaluation system according to claim 7, characterized in that: The engine power efficiency evaluation index is the ratio of the actual applied average power of the engine to the maximum rated power of the engine, and is expressed as follows: Where: N e ' is used to characterize the actual average power of the engine.

9. The engine cost-effectiveness evaluation system according to claim 8, characterized in that: The actual applied average power of the engine is expressed as follows: Where: W act It is used to characterize the actual application cycle work of the engine; T is used to characterize the cycle operating time.

10. The engine cost-effectiveness evaluation system according to claim 9, characterized in that: The load rate is expressed as follows: Where: λ is used to characterize the load rate; N e Used to represent the maximum rated power of the engine; N e ' is used to characterize the actual applied average power of the engine; The specific power is expressed as follows: Where: N l Used to characterize the specific power; V h Used to characterize the displacement of the engine; The incremental cost is expressed as follows: Where: k v Used to represent the liter cost; C0 is used to represent the engine value; The price coefficient is expressed as follows: Where: k p Used to characterize the price coefficient; C1 is used to characterize the engine price; The engine specific cost is expressed as follows: Where: n n Used to characterize the rated speed of the engine; k t Used to characterize the engine technical condition coefficient.

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