Flow calculation method and device, electronic equipment, vehicle and storage medium

Abstract

The invention relates to a flow calculation method and device, electronic equipment, a vehicle and a storage medium. The flow calculation method comprises the steps that the opening degree of a target bypass valve of an engine is obtained; the target bypass valve is a target bypass valve on a bypass pipeline of the engine; based on the opening degree of the target bypass valve and the geometric model of the bypass pipeline, the circulation area of the bypass pipeline is determined; the flow area is used for reflecting the flow of the bypass pipeline; the geometric model of the bypass pipeline is used for converting the geometric structure of the bypass pipeline into an equivalent pipeline with the same flow characteristic according to the opening degree of the target bypass valve. According to the method, the geometric model of the bypass pipeline is constructed, and the bypass pipeline is simplified into the corresponding equivalent pipeline based on the opening degree of the target bypass valve, so that the complexity of flow calculation can be reduced under the condition that the calculation precision is not influenced.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and particularly to a flow calculation method, device, electronic device, vehicle and storage medium. Background Art

[0002] With the implementation of the "dual-carbon strategy", the market share of new energy vehicles has increased rapidly. In the face of the problems of range anxiety and inconvenient charging of pure electric vehicles, hybrid vehicles have become an important choice. As the main power source of hybrid vehicles, dedicated hybrid engines usually use an exhaust gas target bypass valve to regulate the exhaust pressure. However, in the initial stage of engine development, the exhaust gas bypass flow rate at different opening degrees of different target bypass valves is not yet clear, and it is necessary to determine the control strategy and logic of the exhaust gas target bypass valve through later calibration. Therefore, due to improper selection of the exhaust gas target bypass valve in the early stage, the flow rate of the exhaust gas bypass pipe may be unstable during the use and development process, thus affecting the engine performance.

[0003] In view of the above problems, the related technologies mainly determine the accurate exhaust gas bypass pipe flow rate under different working conditions in advance through pre-computational fluid dynamics (CFD) simulation or special shape design, etc. It can be seen that although the related technologies can avoid the problem of unstable flow rate in the initial stage of project development, however, simulating the opening degrees of different target bypass valves respectively requires a large amount of computing resources, and there are problems of large amount of calculation, high calculation difficulty and long cycle. Summary of the Invention

[0004] The present invention provides a flow calculation method, device, electronic device, vehicle and storage medium to solve the problems of high calculation difficulty and long calculation cycle when calculating the flow rate of the bypass pipe.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a flow calculation method, including: obtaining the opening degree of a target bypass valve of an engine; the target bypass valve is a target bypass valve on the bypass pipe of the engine; determining the flow area of the bypass pipe based on the opening degree of the target bypass valve and the geometric model of the bypass pipe; the flow area is used to reflect the flow rate of the bypass pipe; the geometric model of the bypass pipe is used to convert the geometric structure of the bypass pipe into an equivalent pipe with the same flow characteristics according to the opening degree of the target bypass valve.

[0006] According to the above technical means, the opening degree of the target bypass valve of the engine is obtained, and based on the opening degree of the target bypass valve, the geometric structure of the bypass pipeline is simplified into an equivalent pipeline, so that the model of the bypass pipeline is simple and easy to calculate the flow rate, thereby reducing the complexity of the flow rate calculation. Furthermore, based on the opening degree of the target bypass valve and the geometric model of the bypass pipeline, the flow area of the bypass pipeline can be determined more quickly. In this way, the flow rate calculation method provided by the present application can directly determine the relationship between the valve opening degree and the flow area of the bypass pipeline, thereby reducing the complexity and cycle of the flow rate calculation.

[0007] Further, determining the flow area of the bypass pipeline based on the opening degree of the target bypass valve and the geometric model of the bypass pipeline includes: based on the opening degree of the target bypass valve, equivalent the flow region to a sectorial ring; perform geometric transformation on the sectorial ring to obtain a target cylinder; determine the flow area of the bypass pipeline based on the lateral area of the target cylinder.

[0008] According to the above technical means, based on the opening degree of the target bypass valve, equivalent the flow region of the bypass pipeline to a sectorial ring, which can visualize the flow area of the bypass pipeline and facilitate understanding and calculation. Since the area of a cylinder can be quickly calculated by a standard formula, therefore, perform geometric transformation on the sectorial region to obtain a target cylinder, which further simplifies the complexity of the flow rate calculation. In this way, based on the lateral area of the target cylinder, the flow area of the bypass pipeline can be determined more quickly, reducing the complexity and cycle of the flow rate calculation.

[0009] Further, equivalent the flow region to a sectorial ring based on the opening degree of the target bypass valve, including: determining a target line segment in the projection of the target bypass valve on the target plane; wherein, there are multiple end points in the projection of the target bypass valve on the target plane, and the target line segment is the target line segment composed of the first end point and the second end point in the projection of the target bypass valve on the target plane; the first end point is the end point with the shortest distance between the multiple end points and the rotation point of the target bypass valve, and the second end point is the end point with the longest distance between the multiple end points and the rotation point of the target bypass valve; determine the moving area of the target line segment on the bypass pipeline based on the opening degree of the target bypass valve; determine the sectorial ring based on the moving area.

[0010] According to the above technical means, determine the target line segment in the projection of the target bypass valve on the target plane, determine the moving area of the target line segment on the bypass pipeline based on the opening degree of the target bypass valve, and simplify the working process of the target bypass valve to the moving area of the target line segment, which can visualize and make the flow area of the bypass pipeline concrete, thereby reducing the complexity of the flow rate calculation.

[0011] Further, the flow area of the bypass pipeline satisfies the following formula: ; wherein, represents the flow area of the bypass pipeline, Indicates the opening degree of the target bypass valve. Indicates the valve face diameter of the target bypass valve. Indicates the rotation radius of the first end point of the target bypass valve.

[0012] According to the above technical means, a geometric model of the bypass pipeline is constructed, and the bypass pipeline is visualized and simplified, thereby improving the speed of flow calculation, reducing the calculation cycle, and reducing the complexity of flow calculation.

[0013] Furthermore, the above flow calculation method further includes: obtaining the flow area of the main exhaust pipeline of the engine; determining the bypass ratio and bypass ratio gradient of the engine based on the opening degree of the target bypass valve, the flow area of the bypass pipeline, and the flow area of the main exhaust pipeline; determining whether the target bypass valve matches the engine based on the bypass ratio and bypass ratio gradient.

[0014] According to the above technical means, based on the opening degree of the target bypass valve, the flow area of the bypass pipeline, and the flow area of the main exhaust pipeline, the bypass ratio and bypass ratio gradient can be determined more reasonably, thereby obtaining the relationship between the opening degree of the target bypass valve and the bypass ratio, and simplifying the flow calculation process.

[0015] Furthermore, the target bypass valve has multiple opening degrees, and one opening degree corresponds to one bypass ratio; the flow area of the main exhaust pipeline is determined based on the bypass ratio corresponding to the maximum value among the multiple opening degrees.

[0016] According to the above technical means, the flow area of the main exhaust pipeline is determined by the maximum value of the opening degree of the target bypass valve, which is convenient for calculating the bypass ratio, and further improves the speed of flow calculation.

[0017] Furthermore, determining the bypass ratio and bypass ratio gradient based on the opening degree of the target bypass valve, the flow area of the bypass pipeline, and the flow area of the main exhaust pipeline includes: determining the bypass ratio based on the ratio between the flow area of the bypass pipeline and the total flow area; where the total flow area is the sum of the flow area of the bypass pipeline and the flow area of the main exhaust pipeline; determining the bypass ratio gradient based on the bypass ratio.

[0018] According to the above technical means, based on the ratio between the area of the bypass pipeline and the total flow area, the bypass ratio under different opening degrees of the target bypass valve can be determined, which is convenient for controlling the opening degree of the target bypass valve in actual work and reducing the work difficulty of the staff. Based on the bypass ratio, the bypass ratio gradient is determined, which is convenient for observing the smoothness of the vehicle through the bypass ratio gradient, and further improving the performance of the vehicle.

[0019] Furthermore, the bypass ratio satisfies the following formula: ; where represents the bypass ratio; represents the flow area of the main exhaust pipeline; Represents the flow area of the bypass pipe.

[0020] According to the above technical means, by calculating the bypass rate, the correct target bypass valve can be selected in the early stage, thereby reducing the impact on the engine performance.

[0021] In a second aspect, the present invention provides a flow calculation device, including a communication module and a processing module. The communication module is used to obtain the opening degree of the target bypass valve of the engine; the target bypass valve is the target bypass valve on the bypass pipe of the engine; the processing module is used to determine the flow area of the bypass pipe based on the opening degree of the target bypass valve and the geometric model of the bypass pipe; the flow area is used to reflect the flow rate of the bypass pipe; the geometric model of the bypass pipe is used to convert the geometric structure of the bypass pipe into an equivalent pipe with the same flow characteristics according to the opening degree of the target bypass valve.

[0022] Further, the processing module is specifically used to equivalently transform the flow area into a sector-shaped ring based on the opening degree of the target bypass valve; perform geometric transformation on the sector-shaped ring to obtain a target cylinder; determine the flow area of the bypass pipe based on the lateral area of the target cylinder.

[0023] Further, the processing module is specifically used to determine a target line segment in the projection of the target bypass valve on the target plane; wherein, there are multiple endpoints in the projection of the target bypass valve on the target plane, and the target line segment is the target line segment composed of the first endpoint and the second endpoint in the projection of the target bypass valve on the target plane; the first endpoint is the endpoint with the shortest distance from the rotation point of the target bypass valve among the multiple endpoints, and the second endpoint is the endpoint with the longest distance from the rotation point of the target bypass valve among the multiple endpoints; determine the moving area of the target line segment on the bypass pipe based on the opening degree of the target bypass valve; determine the sector-shaped ring based on the moving area.

[0024] Further, the flow area of the bypass pipe satisfies the following formula: ; where represents the flow area of the bypass pipe, represents the opening degree of the target bypass valve, represents the valve face diameter of the target bypass valve, represents the rotation radius of the first endpoint of the target bypass valve.

[0025] Further, the communication module is also used to obtain the flow area of the main exhaust pipe of the engine; the processing module is also used to determine the bypass rate and bypass rate gradient of the engine based on the opening degree of the target bypass valve, the flow area of the bypass pipe, and the flow area of the main exhaust pipe; determine whether the target bypass valve matches the engine based on the bypass rate and bypass rate gradient.

[0026] Further, the target bypass valve has multiple opening degrees, and each opening degree corresponds to a bypass ratio; the flow area of the main exhaust pipe is determined based on the bypass ratio corresponding to the maximum value among the multiple opening degrees.

[0027] Further, the processing module is specifically configured to determine the bypass ratio based on the ratio between the flow area of the bypass pipe and the total flow area; wherein, the total flow area is the sum of the flow area of the bypass pipe and the flow area of the main exhaust pipe; and determine the bypass ratio gradient based on the bypass ratio.

[0028] Further, the bypass ratio satisfies the following formula: ; wherein, represents the bypass ratio; represents the flow area of the main exhaust pipe; represents the flow area of the bypass pipe.

[0029] In a third aspect, the present invention provides an electronic device, which includes: a processor and a memory; the memory stores instructions executable by the processor; when the processor is configured to execute the instructions, the electronic device implements the method of the first aspect above.

[0030] In a fourth aspect, the present invention provides a vehicle, which includes the electronic device of the third aspect above.

[0031] In a fifth aspect, the present invention provides a computer-readable storage medium, when the instructions in the computer-readable storage medium are executed by the processor of the vehicle, the vehicle can execute the method of the first aspect and any possible implementation manner thereof above.

[0032] In a sixth aspect, the present invention provides a computer program product, the computer program product includes computer instructions, when the computer instructions run on the vehicle, the vehicle executes the method of the first aspect and any possible implementation manner thereof above.

[0033] Advantages of the present invention: Based on the opening degree of the target bypass valve, the present invention equivalently represents the flow area of the bypass pipe as a simple graph, and through a figurative means, it is convenient for understanding and calculation. The structure of the target bypass valve is reasonably simplified, and the movement during the working process of the target bypass valve is clearer and more intuitive, thereby reducing the complexity of calculation. Furthermore, based on the opening degree of the target bypass valve, the flow area of the bypass pipe, and the flow area of the main exhaust pipe, the bypass ratio and the bypass ratio gradient can be determined more reasonably, so as to obtain the relationship between the opening degree of the target bypass valve and the bypass ratio, and simplify the process of flow calculation. In this way, the flow calculation method provided by the present invention can directly determine the relationship between the valve opening degree, the flow area of the bypass pipe, the bypass ratio, and the bypass gradient, thereby reducing the complexity and cycle of flow calculation.

[0034] It should be noted that for the technical effects brought by any of the implementation manners in the second aspect to the sixth aspect, reference may be made to the technical effects brought by the corresponding implementation manner in the first aspect, which will not be elaborated here.

[0035] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings herein are incorporated into the specification and form a part of this specification, showing embodiments consistent with this application, and are used together with the specification to explain the principles of this application, and do not constitute an improper limitation to this application.

[0037] Figure 1 It is a block diagram of a flow calculation system provided by the present invention; Figure 2 It is a flowchart of a flow calculation method provided by the present invention; Figure 3 It is a schematic diagram of the simplification of a bypass pipeline provided by the present invention; Figure 4 It is a flowchart of another flow calculation method provided by the present invention; Figure 5 It is a schematic diagram of the flow area of a bypass pipeline provided by the present invention; Figure 6 It is a schematic diagram of the flow area of another bypass pipeline provided by the present invention; Figure 7 It is a schematic diagram of the flow area of yet another bypass pipeline provided by the present invention; Figure 8 It is a schematic diagram of the projection of a bypass pipeline provided by the present invention; Figure 9 It is a flowchart of yet another flow calculation method provided by the present invention; Figure 10 It is a comparison chart of the bypass ratio provided by the present invention; Figure 11 It is a comparison chart of the bypass ratio gradient provided by the present invention; Figure 12 It is a flowchart of yet another flow calculation method provided by the present invention; Figure 13 It is a flowchart of yet another flow calculation method provided by the present invention; Figure 14 It is a structural diagram of a flow calculation device provided by the present invention; Figure 15 It is a block diagram of an electronic device provided by the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, rather than for limiting the protection scope of the present invention.

[0039] In the embodiments of the present application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the process, article or device including that element.

[0040] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0041] By adjusting the air flow direction and flow rate in the exhaust gas bypass pipe, the performance of the hybrid engine can be optimized. Therefore, the accurate calculation of the bypass pipe flow rate is particularly important. In the related art, an exhaust gas bypass turbine structure is proposed. This structure allows the exhaust gas upstream of the turbine impeller to flow out of the turbine housing and enter the bypass channel, thus bypassing the turbine impeller. In the above method, the control of the bypass flow rate is achieved through the throat area, rather than through the area between the valve head and the valve seat. Another related art provides an exhaust gas bypass valve control device, which effectively reduces the power consumption while ensuring high response. The exhaust gas bypass valve control device sets a target opening according to the operating state of the internal combustion engine, and judges whether it is necessary to supercharge the internal combustion engine based on the detected internal combustion engine speed and the set target opening. When it is judged that supercharging is not required, the device stops supplying current to its drive part when the exhaust gas bypass valve reaches the desired opening. However, the prior art mainly controls the flow rate of the bypass pipe based on the structure or control logic of the bypass valve. When calculating and controlling the flow rate, there are problems such as large calculation amount, high calculation difficulty and long cycle.

[0042] In view of this, the present application provides a flow calculation method, which obtains the opening degree of the target bypass valve of the engine. The target bypass valve is the target bypass valve on the bypass pipeline of the engine. According to the opening degree of the target bypass valve, the geometric structure of the bypass pipeline is converted into an equivalent pipeline, so that the geometric model of the bypass pipeline is simple and easy to calculate the flow rate, thereby reducing the complexity of flow calculation. Furthermore, based on the opening degree of the target bypass valve and the geometric model of the bypass pipeline, the flow area of the bypass pipeline can be determined more quickly, reducing the complexity of flow calculation.

[0043] For the sake of easy understanding, the flow calculation method provided by the present application will be specifically introduced below in conjunction with the accompanying drawings.

[0044] The flow calculation method provided by the present application can be applied to a Figure 1 flow calculation system as shown. The flow calculation system includes: a target bypass valve 110 and a flow calculation device 120, wherein the flow calculation device 120 is connected to the target bypass valve 110.

[0045] In some embodiments, the flow calculation device 120 is used to determine the flow area of the bypass pipeline. Exemplarily, the flow calculation device 120 is used to obtain the opening degree of the target bypass valve 110 of the bypass pipeline, and based on the opening degree of the target bypass valve 110 and the geometric model of the bypass pipeline, determine the flow area of the bypass pipeline.

[0046] Among them, the geometric model of the bypass pipeline is used to simplify the geometric structure of the bypass pipeline into an equivalent pipeline with the same flow characteristics according to the opening degree of the target bypass valve 110.

[0047] In some embodiments, the flow calculation device 120 is further used to determine the bypass ratio and the bypass ratio gradient. Exemplarily, the flow calculation device 120 is used to obtain the flow area of the main exhaust pipeline; based on the opening degree of the target bypass valve 110, the flow area of the bypass pipeline and the flow area of the main exhaust pipeline, determine the bypass ratio and the bypass ratio gradient.

[0048] Among them, the target bypass valve 110 has multiple opening degrees, and one opening degree corresponds to one bypass ratio; the flow area of the main exhaust pipeline is determined based on the bypass ratio corresponding to the maximum value among the multiple opening degrees.

[0049] It should be noted that based on the bypass ratio and the bypass ratio gradient, it can be determined whether the target bypass valve matches the engine.

[0050] It should be understood that the flow calculation device 120 can be an electronic device. For example, the flow calculation device 120 can be a server cluster composed of multiple servers, or a single server, or a computer, or a processor or processing chip in a server or computer, or any other device or equipment capable of flow calculation. In addition, the flow calculation device 120 can also be a device or equipment in a vehicle capable of performing flow calculation. The embodiments of the present application do not limit this.

[0051] It should be noted that the system architecture described in the embodiments of the present application is to more clearly illustrate the technical solutions of the embodiments of the present application, and does not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those of ordinary skill in the art know that with the evolution of the system architecture, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0052] The flow calculation method provided by the embodiments of the present application can be applied to Figure 1 the flow calculation device 120 in the flow calculation system shown in Figure 2 As shown, the specific steps of this flow calculation method include the following: S201. Obtain the opening degree of the target bypass valve of the engine.

[0053] Among them, the target bypass valve is the target bypass valve on the bypass pipeline of the engine.

[0054] It can be understood that the bypass pipeline, as an auxiliary system, is used to provide a passage for the exhaust gas to bypass the main exhaust system.

[0055] In some embodiments, the target bypass valve is used to control whether the exhaust gas flows around the main exhaust system. By controlling the opening degree of the target bypass valve, the flow rate of the exhaust gas is changed. When the opening degree of the target bypass valve is zero, the exhaust gas cannot bypass the main exhaust system. As the opening degree of the target bypass valve increases, the amount of exhaust gas bypassing the exhaust system increases. Among them, the opening degree of the target bypass valve can be greater than or equal to 0 and less than or equal to 100%.

[0056] S202. Determine the flow area of the bypass pipeline based on the opening degree of the target bypass valve and the geometric model of the bypass pipeline.

[0057] As a feasible implementation method, the flow area is used to reflect the flow rate of the bypass pipeline.

[0058] It should be understood that the flow area of the bypass pipeline directly determines the area through which the exhaust gas can flow. The area through which the exhaust gas can flow determines the flow rate of the bypass pipeline. Therefore, the flow area can directly reflect the flow rate of the bypass pipeline.

[0059] As a feasible implementation, the geometric model of the bypass pipe is used to convert the geometric structure of the bypass pipe into an equivalent pipe with the same flow characteristics according to the opening degree of the target bypass valve.

[0060] It should be understood that the lateral area of the equivalent pipe can be used as the area where the target bypass valve moves during operation, and the lateral area of the equivalent pipe can be used to reflect the flow area of the bypass pipe.

[0061] It should be noted that during the operation of the target bypass valve, as the opening degree of the target bypass valve changes, the flow area of the bypass pipe changes. Therefore, according to the opening degree of the target bypass valve, the geometric structure of the bypass pipe can be simplified into an equivalent pipe with the same flow characteristics, which can be calculated based on standard calculation formulas, thereby simplifying the complexity of flow calculation. Exemplarily, as Figure 3 shown, the bypass pipe is equivalently simplified into an equivalent pipe based on the opening degree of the target bypass valve. The main exhaust pipe remains unchanged, and the main exhaust pipe is connected to the bypass pipe and can allow flow. During the operation of the target bypass valve, the target bypass valve moves in the bypass pipe. As the target bypass valve moves, a gap is generated between the target bypass valve and the bypass pipe for the exhaust gas to pass through. Therefore, the lateral area of the equivalent pipe can be obtained as the flow area of the bypass pipe.

[0062] As a feasible implementation, the flow area of the bypass pipe is used to characterize the amount of exhaust gas flowing through the bypass pipe.

[0063] It should be understood that the geometric model of the bypass pipe is obtained by performing image transformation on the geometric structure of the bypass pipe. The geometric model of the bypass pipe can directly determine the flow area of the bypass pipe. Therefore, the transformed geometric model can be used to characterize the flow area of the bypass pipe.

[0064] The opening degree of the target bypass valve can directly change the flow rate of the exhaust gas passing through the bypass pipe. The larger the opening degree of the target bypass valve, the larger the flow area of the bypass pipe. Therefore, the flow area of the bypass pipe can be determined based on the opening degree of the target bypass valve.

[0065] It can be understood that by obtaining the opening degree of the target bypass valve of the bypass pipe and simplifying the geometric structure of the bypass pipe into an equivalent pipe according to the opening degree of the target bypass valve, the model of the bypass pipe is made simple and easy to calculate the flow rate, thereby reducing the complexity of flow calculation. Furthermore, based on the opening degree of the target bypass valve and the geometric model of the bypass pipe, the flow area of the bypass pipe can be determined more quickly. In this way, the flow calculation method provided by the present application can directly determine the relationship between the valve opening degree and the flow area of the bypass pipe, thereby reducing the complexity and cycle of flow calculation.

[0066] In some embodiments, to simplify the calculation of the flow area of the bypass duct, the flow region of the bypass duct can be simplified to the lateral area of a target cylinder.

[0067] As a feasible implementation, as Figure 4 shown, the above step S202 can be specifically implemented as the following steps: S2021. Based on the opening degree of the target bypass valve, the flow region is equivalent to a sector-shaped ring.

[0068] As a feasible implementation, the flow region is used to represent the flowable region of the exhaust gas in the bypass duct.

[0069] It should be noted that the change in the opening degree of the target bypass valve can be regarded as the rotational movement of the valve surface. Therefore, the flow region of the bypass duct can be regarded as the lateral area of the sector-shaped ring that the target bypass valve slides through in the bypass duct.

[0070] It should be understood that, as Figure 5 shown, the target bypass valve can be regarded as a plane (valve surface), a spatial coordinate system is constructed, the direction parallel to the main exhaust duct and perpendicular to the bypass duct is taken as the x-axis; the direction perpendicular to both the bypass duct and the main exhaust duct is taken as the y-axis; the direction perpendicular to the main exhaust duct and parallel to the bypass duct is taken as the z-axis.

[0071] Projecting the flow region onto the y-z plane, it can be seen that the target bypass valve is projected as a target line segment AC, and during the working process of the target bypass valve, the target line segment AC rotates around the rotation point O to the line segment BD, the angle AOB is the opening degree of the target bypass valve, and the area swept by the target bypass valve is the flow region of the bypass duct, and it can be seen that Figure 5 the shaded sector-shaped ring in Among them, point A on the target line segment is the first end point of the target bypass valve, is used to represent the rotation radius of the first end point (point A) of the target bypass valve, and the rotation trajectory of the first end point is the arc AB; point C on the target line segment is the second end point of the target bypass valve, , is used to represent the valve face diameter of the target bypass valve (i.e., the line segment AC).

[0072] It should be noted again that the first end point is the end point with the shortest distance between the rotation point of the target bypass valve among multiple end points, and the second end point is the end point with the longest distance between the rotation point of the target bypass valve among multiple end points.

[0073] S2022. Perform geometric transformation on the sector-shaped ring to obtain a target cylinder.

[0074] As a feasible implementation method, geometric changes are made to the sector-shaped ring including: making the sector-shaped ring equivalent to a trapezoidal cylinder; making the trapezoidal cylinder equivalent to a trapezoidal cylinder; and making the trapezoidal cylinder equivalent to a target cylinder.

[0075] It should be understood that the sector cylinder is equivalent to a trapezoidal cylinder, such as Figure 6 As shown, Figure 5 The fan-shaped circle ABDC determined in the figure is drawn along OA to point G, and the length of OG is equal to the length of line segment OC. A long line is drawn along OB to point H, and point H is on arc CD (the motion trajectory of the second end point of the target bypass valve). The distances from the points on arc CD to the rotation point O are the same, and the length of line segment OH is equal to line segment OD. Therefore, fan-shaped COD and fan-shaped GOH are equivalent figures, GC is equal to HD, that is, fan-shaped GAC is equal to fan-shaped HBD. Based on this, a trapezoidal cylinder can be obtained, and the shaded part is the flow area of ​​the flow pipe.

[0076] like Figure 7 As shown, the projection of the trapezoidal cylinder on the yz plane is rotated and straightened. It should be noted that the flow trajectory of the exhaust gas in the bypass pipe is not strictly equal to the arc AB and the arc GH. Therefore, the rotated and straightened figure can be equivalent to the isosceles trapezoid GABH. Assume that the midpoint of AB is point F, the midpoint of GH is point E, and the opening of the target bypass valve is , we can get the angle of AOF as , further equating the equivalent trapezoid to a rectangle IBJG, we can get the target cylinder, and the shaded part is the flow area of ​​the flow pipe.

[0077] S2023. Determine the flow area of ​​the bypass pipe based on the lateral area of ​​the target cylinder.

[0078] It should be understood that the target cylinder is obtained by changing the flow area image of the bypass pipe, and the side area of ​​the target cylinder can be equivalent to the exhaust gas flow that can pass through the bypass pipe. Therefore, the flow area of ​​the bypass pipe can be determined based on the side area of ​​the target cylinder.

[0079] It should be noted that the lateral area of ​​the target cylinder can be equivalent to a rectangle, which is determined based on the circumference and height of the base circle.

[0080] As a feasible implementation method, Figure 7 As shown, the lateral area of ​​the target cylinder can satisfy the following formula (1): Formula (1); in, Used to represent the lateral area of ​​the target cylinder, Used to indicate the diameter of the base circle of the target cylinder. is used to represent the height of the target cylinder, where AB is used to represent the length of line segment AB, and GH is used to represent the length of line segment GH.

[0081] As a feasible implementation method, such as Figure 7 shown, to calculate the lateral area of the target cylinder, it is necessary to determine the diameter of the bottom circle of the target cylinder and the height of the target cylinder.

[0082] Exemplarily, such as Figure 7 shown, the diameter of the bottom circle of the target cylinder can be determined based on the opening degree and the rotation radius of the target bypass valve ( ). The diameter of the bottom circle of the target cylinder can satisfy the following formula (2): Formula (2); where, is used to represent the diameter of the bottom circle of the target cylinder, is used to represent the rotation radius of the second end point of the target bypass valve, is used to represent the rotation radius of the first end point of the target bypass valve, is used to represent the opening degree of the target bypass valve.

[0083] Exemplarily, such as Figure 7 shown, the lengths of line segment AB and line segment GH can be determined based on the opening degree and the rotation radius of the target bypass valve ( ). The length of line segment AB can satisfy the following formula (3): Formula (3); where, is used to represent the rotation radius of the first end point of the target bypass valve, is used to represent the opening degree of the target bypass valve.

[0084] Exemplarily, the length of line segment GH can satisfy the following formula (4): Formula (4); where, is used to represent the rotation radius of the second end point of the target bypass valve, is used to represent the opening degree of the target bypass valve.

[0085] As a feasible implementation method, such as Figure 5 shown, the rotation radius of the second end point of the target bypass valve can be determined based on the rotation radius of the first end point of the target bypass valve, the included angle between the target bypass valve and line segment AO, and the valve face diameter. Exemplarily, the rotation radius of the second end point of the target bypass valve can satisfy the following formula (5): Formula (5); where, For representing the radius of rotation of the second end point of the target bypass valve, For representing the radius of rotation of the first end point of the target bypass valve, Representing the valve face diameter of the target bypass valve, For representing the angle between the target bypass valve and the line segment AO.

[0086] It should be noted that by substituting Formula (2), Formula (3), Formula (4), and Formula (5) into Formula (1), the flow area of the bypass pipeline can be obtained, and the flow area of the bypass pipeline can satisfy the following Formula (6): Formula (6); Wherein, For representing the flow area of the bypass pipeline, For representing the opening degree of the target bypass valve, For representing the valve face diameter of the target bypass valve, For representing the radius of rotation of the first end point of the target bypass valve.

[0087] It should be understood that by constructing the geometric model of the bypass pipeline, the bypass pipeline is visualized and simplified, thereby improving the speed of flow calculation, reducing the calculation cycle, and reducing the complexity of flow calculation.

[0088] It can be understood that based on the opening degree of the target bypass valve, the flow area of the bypass pipeline is equivalent to a sector-shaped ring, which can visualize the flow area of the bypass pipeline and facilitate understanding and calculation. Since the area of a cylinder can be quickly calculated by a standard formula, therefore, geometric transformation is performed on the sector area to obtain the target cylinder, further simplifying the complexity of flow calculation. In this way, based on the lateral area of the target cylinder, the flow area of the bypass pipeline can be determined more quickly, reducing the complexity and cycle of flow calculation.

[0089] As another feasible implementation method, the above step S2021 can be specifically implemented as the following steps: Sa1. Determine the target line segment in the projection of the target bypass valve on the target plane.

[0090] Wherein, the target bypass valve has multiple end points in the projection on the target plane, and the target line segment is the target line segment formed by the first end point and the second end point in the projection of the target bypass valve on the target plane.

[0091] It should be understood that the target plane is the y-x plane, and the y-x plane can accurately reflect the positions of the end points in the target bypass valve and can also reflect the distance between the end points of the target bypass valve and the rotation point. Determine the contour of the projection of the target bypass valve on the y-x plane, and the contour of the projection contains multiple end points. As Figure 8As shown, the end point closest to the rotation point (point O) is taken as the first end point (point A), and the end point farthest from the rotation point is taken as the second end point (point C). Connecting the first end point and the second end point gives the target line segment AC.

[0092] It should be understood that by reasonably simplifying the structure of the target bypass valve, the complexity of flow calculation is reduced, and the computing resources required for flow calculation are decreased.

[0093] Sa2. Determine the moving area of the target line segment on the bypass pipe based on the opening degree of the target bypass valve.

[0094] As a feasible implementation manner, based on the opening degree of the target bypass valve, the moving process of the target bypass valve can be determined, and thus the moving area of the target line segment on the bypass pipe can be determined. For example, Figure 5 the figure ABDC in is the moving area of the target line segment on the bypass pipe.

[0095] Sa3. Determine the sector ring based on the moving area.

[0096] It should be understood that, as Figure 5 shown, the moving area (figure ABDC) is the projection of the bypass pipe on the y - z plane. Furthermore, in the space coordinates, the shaded part can be determined as the flow - through area of the bypass pipe, and the shaded part forms a sector ring.

[0097] It can be understood that determining the target line segment formed by the first end point and the second end point of the target bypass valve, determining the moving area of the target line segment on the bypass pipe based on the opening degree of the target bypass valve, and simplifying the working process of the target bypass valve to the moving area of the target line segment can visualize and make concrete the flow - through area of the bypass pipe, thereby reducing the complexity of flow calculation.

[0098] In some embodiments, after determining the flow - through area of the bypass pipe, in order to better control the flow rate of the bypass pipe, it is necessary to determine the bypass ratio and the bypass ratio gradient.

[0099] As a feasible implementation manner, as Figure 9 shown, the flow - rate calculation method provided by the present application may further include the following steps: S203. Obtain the flow - through area of the main exhaust pipe.

[0100] As a feasible implementation manner, the main exhaust pipe is used to direct the exhaust gas generated by the engine to the exhaust system and finally discharge it to the external environment.

[0101] As a feasible implementation manner, the target bypass valve has multiple opening degrees, and one opening degree corresponds to one bypass ratio; the flow - through area of the main exhaust pipe is determined based on the bypass ratio corresponding to the maximum value among the multiple opening degrees.

[0102] It should be noted that the bypass ratio corresponding to the maximum value among multiple opening degrees can be determined through CFD simulation. It should be understood that although the bypass ratios corresponding to multiple opening degrees of the target bypass valve can be obtained through CFD simulation, however, it is necessary to perform simulations for different opening degrees of the target bypass valve, which is difficult to calculate and has a long cycle. Therefore, in this application, the flow area of the main exhaust pipe is set as a fixed value, and the bypass ratio corresponding to the maximum value of the opening degree of the target bypass valve is determined through CFD simulation, and then the flow area of the main exhaust pipe is determined. Only one CFD simulation needs to be performed, effectively reducing the calculation cycle. Among them, the flow area of the main exhaust pipe is a fixed value. Through CFD simulation, it is not limited to determining the bypass ratio corresponding to the maximum value of the opening degree of the target bypass valve, but also can determine the bypass ratio at any opening degree of the target bypass valve, and then determine the flow area of the main exhaust pipe. This application does not make any limitations in this regard.

[0103] It should be understood that the flow area of the main exhaust pipe can be inversely deduced based on the following bypass ratio calculation formula, which will not be elaborated here.

[0104] S204. Determine the bypass ratio and bypass ratio gradient based on the opening degree of the target bypass valve, the flow area of the bypass pipe, and the flow area of the main exhaust pipe.

[0105] As a feasible implementation method, the bypass ratio is used to reflect the activation degree of the bypass pipe under different load and speed conditions of the engine. It should be understood that a higher bypass ratio usually means a higher usage frequency of the bypass pipe in the exhaust system. The bypass pipe is used to optimize the exhaust pressure of the main exhaust pipe and reduce the engine temperature.

[0106] As another feasible implementation method, the bypass ratio gradient is used to measure the sensitivity of the exhaust gas flow rate change in the bypass pipe during operation. The level of the bypass ratio gradient directly affects the smoothness of the vehicle's power output and the change of the engine performance.

[0107] It should be understood that the change of the opening degree of the target bypass valve can change the flow area of the bypass pipe, and thus affect the bypass ratio. Therefore, the bypass ratio and bypass ratio gradient can be determined based on the opening degree of the target bypass valve, the flow area of the bypass pipe, and the flow area of the main exhaust pipe.

[0108] As a feasible implementation method, as Figure 10 and Figure 11 shown, the scatter points are the bypass ratio and bypass ratio gradient determined through CFD simulation at different valve opening degrees, and the curve is the bypass ratio and bypass ratio gradient determined through the flow calculation method of this application. It can be seen that the error between the scatter point values and the curve values is small, and this application is continuous and can cover the full opening degree of the target bypass valve, with a wider applicability.

[0109] It should be noted that the calculation of the bypass ratio at the opening of a single target bypass valve during CFD simulation consumes approximately 480 core-hours of simulation computing resources. Figure 10 and Figure 11 The simulation results of the discrete points in [reference] take approximately 1400 core-hours, and the calculation cycle is long. The flow rate calculation method provided by this application can quickly obtain the bypass ratio and bypass ratio gradient at different openings of the target bypass valve after determining the bypass ratio corresponding to the maximum opening of the target bypass valve through CFD simulation, effectively improving the flow rate calculation efficiency.

[0110] As another feasible implementation method, the bypass ratio and bypass ratio gradient are determined based on the total flow area and the flow area of the bypass pipeline.

[0111] Among them, the total flow area is determined based on the bypass ratio at the opening of any target bypass valve.

[0112] It should be understood that assuming the total flow area is a fixed value, the bypass ratio at the opening of any target bypass valve is obtained through CFD simulation, and the flow area of the bypass pipeline is determined through the opening of the target bypass valve and the geometric model of the bypass pipeline. Then, the total flow area is determined based on the bypass ratio and the flow area of the bypass pipeline.

[0113] S205. Determine whether the target bypass valve matches the engine based on the bypass ratio and bypass ratio gradient.

[0114] It should be understood that the bypass ratio and bypass ratio gradient can reflect the performance of the engine during exhaust. Therefore, it is possible to determine whether the target bypass valve matches the engine based on the bypass ratio and bypass ratio gradient.

[0115] It can be understood that based on the opening of the target bypass valve, the flow area of the bypass pipeline, and the flow area of the main exhaust pipeline, it is possible to more reasonably determine the bypass ratio and bypass ratio gradient, thereby obtaining the relationship between the opening of the target bypass valve and the bypass ratio, simplifying the process of flow rate calculation.

[0116] In some embodiments, the bypass ratio can be determined by the ratio between the flow area of the bypass pipeline and the total flow area, and then the bypass ratio gradient can be determined based on the bypass ratio.

[0117] As a feasible implementation method, as shown in [reference], the above step S204 can be specifically implemented as the following steps: Figure 12 shown, the above step S204 can be specifically implemented as the following steps: S2041. Determine the bypass ratio based on the ratio between the flow area of the bypass pipeline and the total flow area.

[0118] Among them, the total flow area is the sum of the flow area of the bypass pipeline and the flow area of the main exhaust pipeline.

[0119] As a feasible implementation method, the bypass ratio directly reflects the proportion of the bypass duct in the exhaust process. Therefore, the bypass ratio can be determined based on the ratio between the flow area of the bypass duct and the total flow area.

[0120] Exemplarily, the bypass ratio can satisfy the following formula (7): Formula (7); Wherein, is used to represent the bypass ratio; is used to represent the flow area of the main exhaust duct; is used to represent the flow area of the bypass duct.

[0121] S2042. Determine the bypass ratio gradient based on the bypass ratio.

[0122] As a feasible implementation method, the bypass ratio is used to reflect the ratio between the exhaust flow rate of the bypass duct (i.e., the flow area of the bypass duct) and the total exhaust flow rate (i.e., the total flow area), and the bypass ratio gradient is used to reflect the sensitivity of the above ratio to the opening degree of the target bypass valve. Therefore, the bypass ratio gradient can be determined through the bypass ratio. Exemplarily, the bypass ratio gradient is determined by taking the derivative of the bypass ratio.

[0123] It can be understood that based on the ratio between the area of the bypass duct and the total flow area, the bypass ratio at different opening degrees of the target bypass valve can be determined, which is convenient for controlling the opening degree of the target bypass valve in actual work and reducing the work difficulty of the staff. Based on the target bypass valve, the bypass ratio gradient is determined, which is convenient for observing the smoothness of the vehicle through the bypass ratio gradient, thereby improving the performance of the vehicle.

[0124] As a feasible implementation method, the above step S2042 can be specifically implemented as: taking the derivative of the bypass ratio to determine the bypass ratio gradient.

[0125] It should be noted that in order to reflect the sensitivity of the bypass ratio to the opening degree of the target bypass valve, the derivative of the bypass ratio with respect to the opening degree of the target bypass valve is taken to determine the bypass ratio gradient.

[0126] It should be understood that the bypass ratio gradient can satisfy the following formula (8): Formula (8); Wherein, is used to represent the bypass ratio gradient, is used to represent the bypass ratio, is used to represent the opening degree of the target bypass valve.

[0127] As another feasible implementation method, by combining Formula (6), Formula (7) and Formula (8), the obtained bypass ratio gradient can satisfy the following formula (9): Formula (9); wherein, is used to represent the bypass rate gradient, is used to represent the opening degree of the target bypass valve, is used to represent the flow area of the main exhaust pipe, is used to represent the flow area of the bypass pipe, is used to represent the valve face diameter, is used to represent the rotation radius of the first end point of the target bypass valve, is used to represent the included angle between the target bypass valve and the line segment AO.

[0128] It can be understood that by taking the derivative of the bypass rate to determine the bypass rate gradient, the change process of the bypass rate can be intuitively reflected, which helps to optimize the engine performance.

[0129] In some embodiments, referring to Figure 13 , the flow calculation method provided by this application can be implemented as the following steps: S1301. Obtain the opening degree of the target bypass valve.

[0130] S1302. Construct the geometric model of the bypass pipe.

[0131] Exemplarily, the geometric model of the bypass pipe is used to convert the geometric structure of the bypass pipe into an equivalent pipe with the same flow characteristics according to the opening degree of the target bypass valve.

[0132] S1303. Based on the opening degree of the target bypass valve and the geometric model of the bypass pipe, determine the flow area of the bypass pipe.

[0133] wherein, the flow area is used to reflect the flow rate of the bypass pipe.

[0134] S1304. Based on the bypass rate corresponding to the maximum value of the opening degree of the target bypass valve, determine the flow area of the main exhaust pipe.

[0135] Exemplarily, step S1304 can be processed in parallel with steps S1302 and S1303.

[0136] S1305. Based on the ratio between the flow area of the bypass pipe and the total flow area, determine the bypass rate.

[0137] wherein, the total flow area is the sum of the flow area of the bypass pipe and the flow area of the main exhaust pipe.

[0138] S1306. Based on the bypass rate, determine the bypass rate gradient.

[0139] The above mainly introduced the solution provided by the embodiments of the present application from the perspective of methods. To implement the above functions, the flow calculation device or electronic device includes the corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed in this article, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0140] Embodiments of the present invention can, according to the above method, exemplarily divide the function modules of the flow calculation device or electronic device. For example, the flow calculation device or electronic device can include each function module corresponding to each function division, or two or more functions can be integrated into one processing module. The above integrated module can be implemented in the form of hardware or in the form of a software function module. It should be noted that the division of modules in the embodiments of the present application is illustrative, only a logical function division, and there can be other division methods in actual implementation.

[0141] Referring to Figure 14 , the present invention provides a flow calculation device 1400, including a communication module 1401 and a processing module 1402. The communication module 1401 is used to obtain the opening degree of the target bypass valve of the bypass pipeline; the processing module 1402 is used to determine the flow area of the bypass pipeline based on the opening degree of the target bypass valve and the geometric model of the bypass pipeline; the flow area is used to reflect the flow rate of the bypass pipeline; the geometric model of the bypass pipeline is used to convert the geometric structure of the bypass pipeline into an equivalent pipeline with the same flow characteristics according to the opening degree of the target bypass valve.

[0142] Further, it is used to obtain the opening degree of the target bypass valve of the engine; the target bypass valve is the target bypass valve on the bypass pipeline of the engine; the processing module 1402 is used to determine the flow area of the bypass pipeline based on the opening degree of the target bypass valve and the geometric model of the bypass pipeline; the flow area is used to reflect the flow rate of the bypass pipeline; the geometric model of the bypass pipeline is used to convert the geometric structure of the bypass pipeline into an equivalent pipeline with the same flow characteristics according to the opening degree of the target bypass valve.

[0143] Further, the processing module 1402 is specifically used to, based on the opening degree of the target bypass valve, equivalent the flow area to a sector ring; perform geometric transformation on the sector ring to obtain a target cylinder; and determine the flow area of the bypass pipeline based on the lateral area of the target cylinder.

[0144] Further, the processing module 1402 is specifically configured to determine a target line segment in the projection of the target bypass valve on the target plane; wherein, in the projection of the target bypass valve on the target plane, there are multiple end points, and the target line segment is the target line segment formed by the first end point and the second end point in the projection of the target bypass valve on the target plane; the first end point is the end point with the shortest distance from the rotation point of the target bypass valve among the multiple end points, and the second end point is the end point with the longest distance from the rotation point of the target bypass valve among the multiple end points; determine the moving area of the target line segment on the bypass pipeline based on the opening degree of the target bypass valve; determine the sector-shaped ring based on the moving area.

[0145] Further, the flow area of the bypass pipeline satisfies the following formula: ; wherein, represents the flow area of the bypass pipeline, represents the opening degree of the target bypass valve, represents the valve face diameter of the target bypass valve, represents the rotation radius of the first end point of the target bypass valve.

[0146] Further, the communication module 1401 is further configured to obtain the flow area of the main exhaust pipeline of the engine; the processing module 1402 is further configured to determine the bypass ratio and the bypass ratio gradient of the engine based on the opening degree of the target bypass valve, the flow area of the bypass pipeline, and the flow area of the main exhaust pipeline; determine whether the target bypass valve matches the engine based on the bypass ratio and the bypass ratio gradient.

[0147] Further, the target bypass valve has multiple opening degrees, and one opening degree corresponds to one bypass ratio; the flow area of the main exhaust pipeline is determined based on the bypass ratio corresponding to the maximum value among the multiple opening degrees.

[0148] Further, the processing module 1402 is specifically configured to determine the bypass ratio based on the ratio between the flow area of the bypass pipeline and the total flow area; wherein, the total flow area is the sum of the flow area of the bypass pipeline and the flow area of the main exhaust pipeline; determine the bypass ratio gradient based on the bypass ratio.

[0149] Further, the bypass ratio satisfies the following formula: ; wherein, represents the bypass ratio; represents the flow area of the main exhaust pipeline; represents the flow area of the bypass pipeline.

[0150] As Figure 15 shown, the present invention provides an electronic device 1500, including but not limited to: a processor 1501 and a memory 1502.

[0151] Among them, the above-mentioned memory 1502 is used to store the executable instructions of the above-mentioned processor 1501. It can be understood that the above-mentioned processor 1501 is configured to execute instructions to implement the traffic calculation method in the above-mentioned embodiments.

[0152] It should be noted that those skilled in the art can understand that Figure 15 the structure of the electronic device shown in does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than Figure 15 shown, or combine certain components, or have different component arrangements.

[0153] The processor 1501 is the control center of the electronic device, connecting various parts of the entire electronic device through various interfaces and lines. By running or executing software programs and / or modules stored in the memory 1502, and by calling the data stored in the memory 1502, it executes various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 1501 may include one or more processing units. Optionally, the processor 1501 may integrate an application processor and a modem processor. Among them, the application processor mainly processes the operating system, user interface, application programs, etc., and the modem processor mainly processes wireless communication. It can be understood that the above-mentioned modem processor may not be integrated into the processor 1501 either.

[0154] The memory 1502 can be used to store software programs and various data. The memory 1502 mainly includes a program storage area and a data storage area. Among them, the program storage area can store the operating system, application programs required by at least one functional module (such as the determination unit, processing unit, etc.), etc. In addition, the memory 1502 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage devices.

[0155] In an exemplary embodiment, there is also provided a computer-readable storage medium including instructions, such as the memory 1502 including instructions. The above-mentioned instructions can be executed by the processor 1501 of the electronic device 1500 to implement the traffic calculation method in the above-mentioned embodiments.

[0156] In actual implementation, Figure 14 the functions of the communication module 1401 and the processing module 1402 in can both be implemented by Figure 15 the processor 1501 in calling the computer program stored in the memory 1502. The specific execution process can refer to the description of the method part in the above embodiments and will not be elaborated here.

[0157] Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium. For example, the non-transitory computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, magnetic tape, a floppy disk, and an optical data storage device, etc.

[0158] In an exemplary embodiment, the embodiments of the present application further provide a computer program product including one or more instructions, and the one or more instructions can be executed by a processor 1501 of an electronic device to complete the traffic calculation method in the above embodiments.

[0159] It should be noted that when the instructions in the above computer-readable storage medium or the one or more instructions in the computer program product are executed by the processor of the electronic device, each process of the above method embodiments is implemented, and the same technical effects as the above method can be achieved. To avoid repetition, it will not be elaborated here.

[0160] Through the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and conciseness of description, only the above division of each functional module is used as an example. In actual applications, the above functions can be allocated to different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0161] In several embodiments provided by the present application, it should be understood that the disclosed device and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point, the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the device or unit can be in an electrical, mechanical or other form.

[0162] The units described as separate components may or may not be physically separated. The components displayed as units may be one physical unit or multiple physical units, that is, they may be located in one place, or they may be distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0163] In addition, in each embodiment of the present application, each functional unit can be integrated into one processing unit, can exist physically alone for each unit, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0164] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on such an understanding, the technical solution of the embodiment of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions to enable a device (which can be a single-chip microcomputer, a chip, etc.) or a processor to execute all or part of the steps of the method of each embodiment of the present application. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0165] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. A flow calculation method, characterized in that: The method comprises: Acquiring the opening of a target bypass valve of the engine; the target bypass valve is a target bypass valve on a bypass pipe of the engine; Based on the opening of the target bypass valve and the geometric model of the bypass pipeline, the flow area of ​​the bypass pipeline is determined; the flow area is used to reflect the flow rate of the bypass pipeline; the geometric model of the bypass pipeline is used to convert the geometric structure of the bypass pipeline into an equivalent pipeline with the same flow characteristics according to the opening of the target bypass valve.

2. The flow calculation method according to claim 1, characterized in that: The determining of the flow area of ​​the bypass pipeline based on the opening of the target bypass valve and the geometric model of the bypass pipeline includes: Based on the opening of the target bypass valve, the flow area is equivalent to a sector-shaped ring; Performing geometric transformation on the sector-shaped ring to obtain a target cylinder; Based on the lateral area of ​​the target cylinder, the flow area of ​​the bypass duct is determined.

3. The flow calculation method according to claim 2, characterized in that: Based on the opening of the target bypass valve, the flow area is equivalent to a sector-shaped ring, including: Determine a target line segment in the projection of the target bypass valve on the target plane; wherein the target bypass valve has a plurality of endpoints in the projection of the target plane, and the target line segment is a target line segment composed of a first endpoint and a second endpoint in the projection of the target bypass valve on the target plane; the first endpoint is an endpoint of the plurality of endpoints that is closest to a rotation point of the target bypass valve, and the second endpoint is an endpoint of the plurality of endpoints that is farthest from a rotation point of the target bypass valve; determining a moving area of ​​a target line segment on the bypass pipe based on the opening of the target bypass valve; The sector-shaped ring is determined based on the moving area.

4. The flow calculation method according to claim 3, characterized in that: The flow area of ​​the bypass pipe satisfies the following formula: ； in, represents the flow area of ​​the bypass pipe, represents the opening degree of the target bypass valve, represents the valve face diameter of the target bypass valve, represents the rotation radius of the first end point of the target bypass valve.

5. The flow calculation method according to any one of claims 1 to 4, characterized in that: The method further comprises: Obtaining a flow area of ​​a main exhaust duct of the engine; determining a bypass rate and a bypass rate gradient of the engine based on the target bypass valve opening, the flow area of ​​the bypass duct, and the flow area of ​​the main exhaust duct; It is determined whether the target bypass valve matches the engine based on the bypass rate and the bypass rate gradient.

6. The flow calculation method according to claim 5, characterized in that: The target bypass valve has a plurality of openings, each opening corresponding to a bypass rate; the flow area of ​​the main exhaust pipe is determined based on the bypass rate corresponding to the maximum value among the plurality of openings.

7. The flow calculation method according to claim 5, characterized in that: The determining of the bypass rate and the bypass rate gradient based on the opening of the target bypass valve, the flow area of ​​the bypass pipe and the flow area of ​​the main exhaust pipe comprises: Determining the bypass rate based on a ratio between a flow area of ​​the bypass duct and a total flow area; wherein the total flow area is the sum of a flow area of ​​the bypass duct and a flow area of ​​the main exhaust duct; Based on the bypass rate, the bypass rate gradient is determined.

8. The flow calculation method according to claim 7, characterized in that: The bypass ratio satisfies the following formula: ； in, represents the bypass rate; represents the flow area of ​​the main exhaust duct; represents the flow area of ​​the bypass pipe.

9. A flow calculation device, characterized in that: include: Communication module and processing module; A communication module, used for obtaining the opening degree of a target bypass valve of the engine; The target bypass valve is a target bypass valve on a bypass pipe of the engine; A processing module is used to determine the flow area of ​​the bypass pipeline based on the opening of the target bypass valve and the geometric model of the bypass pipeline; the flow area is used to reflect the flow rate of the bypass pipeline; the geometric model of the bypass pipeline is used to convert the geometric structure of the bypass pipeline into an equivalent pipeline with the same flow characteristics according to the opening of the target bypass valve.

10. An electronic device, characterized in that: It comprises a processor and a memory, wherein the processor is coupled to the memory; the memory is used to store computer instructions, and the computer instructions are loaded and executed by the processor to enable the computer device to implement the flow calculation method according to any one of claims 1 to 8.

11. A vehicle, characterized in that: Comprising the electronic device as claimed in claim 10.

12. A computer-readable storage medium, characterized in that: When the computer-executable instructions stored in the computer-readable storage medium are executed by a processor of a vehicle, the vehicle can perform the flow calculation method according to any one of claims 1 to 8.

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