Vehicle range extender control method and device, electronic equipment and storage medium

Abstract

The invention relates to the technical field of vehicle range extending control, and discloses a control method and device for a vehicle range extender, electronic equipment and a storage medium, and the control method comprises the steps that the current vehicle speed of a vehicle is obtained, a preset power generation power range corresponding to the current vehicle speed is determined, and the current NVH standard and the current oil-electricity conversion rate standard of the vehicle are obtained; based on universal characteristics of the range extender, determining a target generation power point range meeting a preset generation power range, a current NVH standard and a current oil-electricity conversion rate standard; and taking one target power generation power point in the target power generation power point range as a target working power generation power point, and controlling the range extender to work and generate power based on the target working power generation power point. Therefore, the current vehicle speed corresponds to the preset power generation power range, rotating speed sudden change can be reduced, and then comprehensive oil consumption is reduced. In addition, the target working power generation power point is obtained based on the current NVH standard and the current oil-electricity conversion rate standard, so that the NVH performance and the oil-electricity conversion rate are good when the range extender works.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle range extender control, and in particular to a control method, device, electronic device and storage medium for a vehicle range extender. Background Art

[0002] When the battery pack of a range-extended new energy vehicle has a lower power level than the range extender start-up power level, the range extender will start to generate electricity. If the range extender generates electricity while the vehicle is driving, the power generated by the range extender will be set according to the vehicle speed, so that the power generated by the range extender matches the driving power required by the vehicle at different speeds.

[0003] At present, the power generation strategy of the range extender in the vehicle driving scene is a fixed-point power generation strategy, that is, after the current vehicle speed is determined, the power generation power and operating speed of the range extender will be uniquely determined, and the operating parameters of the range extender are fixed. Based on this power generation strategy, the speed of the range extender will change greatly, resulting in poor transient fuel consumption of the vehicle and poor comprehensive fuel consumption, and the NVH (Noise, Vibration, Harshness) performance of the vehicle cannot be taken into account. Summary of the invention

[0004] In view of the above problems, the present application provides a control method, device, electronic device and storage medium for a vehicle range extender, wherein the current vehicle speed corresponds to a preset power generation range, which can reduce the sudden change in speed and thus reduce the comprehensive fuel consumption. In addition, the target operating power generation point is obtained based on the current NVH standard and the current oil-to-electricity conversion rate standard, so that the NVH performance and oil-to-electricity conversion rate of the range extender are better when it is working.

[0005] In a first aspect, the present application provides a control method for a vehicle range extender, comprising: obtaining a current vehicle speed and determining a preset power generation range corresponding to the current vehicle speed, and obtaining a current NVH standard and a current oil-to-electricity conversion rate standard of the vehicle; wherein the preset power generation range and the preset vehicle speed range have a preset corresponding relationship; based on the universal characteristics of the range extender, determining a target power generation point range that meets the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard; wherein the target power generation point includes a target power and a target speed; taking a target power generation point within the target power generation point range as a target working power generation point, and controlling the range extender to operate and generate power based on the target working power generation point.

[0006] In some specific embodiments, the step of determining a target power generation point range that meets a preset power generation range, a current NVH standard, and a current oil-to-electricity conversion rate standard based on the universal characteristics of the range extender includes: determining a priority order of the three elements of the preset power generation range, the current NVH standard, and the current oil-to-electricity conversion rate standard; wherein the priority order is an arbitrary order of arrangement of the three elements; based on the universal characteristics of the range extender, determining a target power generation point range that meets the three elements of the preset power generation range, the current NVH standard, and the current oil-to-electricity conversion rate standard in sequence according to the priority order.

[0007] In some specific embodiments, the priority order of the three elements of a preset power generation range, a current NVH standard, and a current oil-to-electricity conversion rate standard is determined; wherein the priority order is a step of arbitrarily arranging the three elements in sequence, including: determining a current vehicle mode and a current driving mode of the vehicle; wherein the vehicle mode includes a pure electric mode and a hybrid mode, and the driving mode includes an energy-saving mode and a sports mode; according to the NVH requirements, the oil-to-electricity conversion rate requirements, and a preset relationship corresponding to the current vehicle mode and the current driving mode, the priority order of the three elements of a preset power generation range, the current NVH standard, and the current oil-to-electricity conversion rate standard is determined; wherein there is a preset relationship between the combination of the NVH requirement and the oil-to-electricity conversion rate requirement and the priority order.

[0008] In some specific embodiments, a target power generation point in a target power generation point range is used as a target working power generation point, and the step of controlling the range extender to work and generate power based on the target working power generation point includes: using a target power generation point in the target power generation point range as a first target working power generation point; obtaining a current vehicle mode of the vehicle and determining a corresponding range extender starting power, and obtaining a current remaining power of a battery pack of the vehicle; wherein different vehicle modes correspond to different range extender starting powers; determining a power difference between the current remaining power and the range extender starting power, and determining a first correction coefficient based on the absolute value of the power difference; wherein there is a corresponding relationship between the absolute value of the power difference and the first correction coefficient, and the greater the absolute value of the power difference, the greater the first correction coefficient; multiplying the power corresponding to the first target working power generation point by the first correction coefficient to obtain the target power generation, using a target power generation point in the target power generation point range whose power is equal to the target power generation as a second target working power generation point, and controlling the range extender to work based on the second target working power generation point.

[0009] In some specific embodiments, a target power generation point within a target power generation point range is used as a target working power generation point, and the step of controlling the range extender to operate and generate power based on the target working power generation point includes: using a target power generation point within the target power generation point range as a first target working power generation point; obtaining a current driving mode of the vehicle and determining a second correction coefficient based on the current driving mode; wherein there is a corresponding relationship between the driving mode and the second correction coefficient; multiplying the power corresponding to the first target working power generation point by the second correction coefficient to obtain the target power generation power, using a target power generation point within the target power generation point range whose power is equal to the target power generation power as a second target working power generation point, and controlling the range extender to operate based on the second target working power generation point.

[0010] In some specific embodiments, before the steps of obtaining the current vehicle speed and determining the preset power generation range corresponding to the current vehicle speed, and obtaining the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle, the steps include: obtaining the first required power generation and the second required power generation corresponding to the first endpoint value and the second endpoint value of the preset speed range based on the configuration of the vehicle; wherein the preset speed range is set to multiple and connected in sequence; using the power generation range determined by the first required power generation and the second required power generation as the preset power generation range corresponding to the preset vehicle speed range, and establishing a preset correspondence between the preset vehicle speed range and the preset power generation range.

[0011] In some specific embodiments, the step of taking a target power generation point within the target power generation point range as the target working power generation point includes: determining the oil-to-electricity conversion rate corresponding to each target power generation point within the target power generation point range, and taking the target power generation point with the highest oil-to-electricity conversion rate as the target working power generation point.

[0012] A second aspect of the present application provides a control device for a vehicle range extender, comprising: an acquisition module, used to acquire the current vehicle speed and determine a preset power generation range corresponding to the current vehicle speed, and acquire the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle; wherein there is a preset corresponding relationship between the preset power generation range and the preset vehicle speed range; a control module, used to determine a target power generation point range that meets the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard based on the universal characteristics of the range extender; wherein the target power generation point includes a target power and a target speed; and a target power generation point in the target power generation point range is used as a target working power generation point, and the range extender is controlled to operate and generate power based on the target working power generation point.

[0013] A third aspect of the present application provides an electronic device, comprising: a processor; and a memory for storing a computer program, wherein when the computer program is executed by the processor, any of the above-mentioned vehicle range extender control methods is implemented.

[0014] A fourth aspect of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, a control method for a vehicle range extender as described above is implemented.

[0015] The present application has at least the following beneficial technical effects: Based on the control method, device, electronic device and storage medium of the vehicle range extender provided by the present application, the method includes: obtaining the current speed of the vehicle and determining the preset power generation range corresponding to the current speed, and obtaining the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle; wherein, there is a preset corresponding relationship between the preset power generation range and the preset speed range; based on the universal characteristics of the range extender, determining the target power generation point range that meets the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard; wherein, the target power generation point includes the target power and the target speed; taking a target power generation point in the target power generation point range as the target working power generation point, and controlling the range extender to work and generate electricity based on the target working power generation point. Therefore, the current vehicle speed corresponds to a preset power generation range, so that the range extender has more power generation selectivity, thereby reducing the power generation mutation of the range extender to reduce the speed mutation, thereby reducing the comprehensive fuel consumption. Moreover, the target working power generation point is obtained based on the current NVH standard and the current oil-to-electricity conversion rate standard, so that the NVH performance and oil-to-electricity conversion rate of the range extender when working at the target working power generation point are better.

[0016] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are only used to illustrate the embodiments and are not to be considered as limiting the present application. In addition, the same reference symbols are used to represent the same components throughout the accompanying drawings. In the accompanying drawings:

[0018] Figure 1 It is a flow chart of an embodiment of a control method for a vehicle range extender provided by the present application;

[0019] Figure 2 This is a universal characteristic diagram of the range extender provided in this application;

[0020] Figure 3is another universal characteristic diagram of the range extender provided in this application;

[0021] Figure 4 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application;

[0022] Figure 5 It is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application;

[0023] Figure 6 It is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application;

[0024] Figure 7 It is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application;

[0025] Figure 8 It is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application;

[0026] Fig. 9 It is a structural block diagram of an embodiment of a control device for a vehicle range extender provided by the present application;

[0027] Fig.10 It is a schematic diagram of the structural framework of an embodiment of the electronic device provided by the present application;

[0028] Fig.11 It is a schematic diagram of the structural framework of an embodiment of the computer-readable storage medium provided by the present application. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0030] If there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0031] The first aspect of the present application provides a control method for a vehicle range extender. Figure 1 1 is a flow chart of an embodiment of a control method for a vehicle range extender provided by the present application. Figure 1 , the method comprises the following steps:

[0032] S11: Obtain the current speed of the vehicle and determine the preset power generation range corresponding to the current speed, and obtain the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle; wherein there is a preset corresponding relationship between the preset power generation range and the preset vehicle speed range.

[0033] The application scenario of this patent is a scenario where the vehicle generates electricity through a range extender while in motion. At this time, the working state of the range extender is related to the current speed of the vehicle, and the current speed of the vehicle can be directly obtained through the relevant controller on the vehicle.

[0034] The preset vehicle speed range, the preset power generation range and the relationship between them are preset and stored. After obtaining the current vehicle speed, the preset vehicle speed range corresponding to the current vehicle speed can be directly determined, and the preset power generation range of the preset vehicle speed range can be further determined based on the relationship between the preset vehicle speed range and the preset power generation range, that is, the preset power generation range corresponding to the current vehicle speed.

[0035] It should be understood that the preset power generation range determined in this step is used to limit the power generation of the range extender, that is, in the subsequent control process of the range extender, the power generation of the range extender is required to be within the preset power generation range. In the fixed-point power generation strategy of the prior art, after determining the current vehicle speed, the unique power generation and speed of the range extender will be determined according to the current vehicle speed, so that the range extender can work at this power and speed. Under this power generation strategy, changes in vehicle speed will cause the power generation of the range extender to change, and then its speed will change. In actual application scenarios, due to the variability of vehicle speed, the speed of the range extender changes greatly, resulting in a higher transient fuel consumption of the range extender and a higher comprehensive fuel consumption of the range extender. The current vehicle speed of this patent corresponds to a preset power generation range. Even if the vehicle speed changes, the power generation does not need to change or changes within a small range, thereby making the comprehensive fuel consumption lower.

[0036] Furthermore, the vehicle may be provided with a plurality of preset NVH standards and preset oil-to-electric conversion rate standards. Under different preset NVH standards, different requirements are set for the NVH performance of the vehicle; under different preset oil-to-electric conversion rate standards, different standards are set for the oil-to-electric conversion rate of the vehicle. For example, under a higher preset NVH standard, higher requirements are set for the NVH performance of the vehicle, and the driver and passengers will have higher comfort at this time. Under a higher oil-to-electric conversion rate standard, the vehicle is required to have a higher oil-to-electric conversion rate, and the fuel consumption performance of the vehicle is better at this time. The current NVH standard of the vehicle is one of the preset NVH standards, and the current oil-to-electric conversion rate standard is also one of the preset oil-to-electric conversion rate standards. At this time, the user can select a preset NVH standard as the current NVH standard, and select a preset oil-to-electric conversion rate standard as the current oil-to-electric conversion rate standard. Alternatively, the vehicle can select a preset NVH standard as the current NVH standard according to the specific working state of the vehicle at present, and select a preset oil-to-electric conversion rate standard as the current oil-to-electric conversion rate standard, without specific restrictions.

[0037] S12: Based on the universal characteristics of the range extender, determine a target power point range that meets a preset power range, a current NVH standard, and a current oil-to-electricity conversion rate standard; wherein the target power point includes a target power and a target speed.

[0038] Among them, the universal characteristics of the range extender will reflect the power generation, oil-to-electricity conversion rate and impact on the vehicle NVH performance of the range extender when the range extender works at different speeds and torques.

[0039] Figure 2 This is a universal characteristic diagram of the range extender provided in this application.

[0040] Combination Figure 2, the abscissa represents the speed of the range extender, that is, the speed of the engine of the range extender, and the ordinate represents the torque of the range extender, that is, the torque of the engine of the range extender. Since the power generation power of the range extender is determined by its speed and torque, the coordinate point formed by the abscissa and the ordinate is the power point of the range extender. The multiple curves 11 in the figure represent the power curves of the range extender, and the power points on the same power curve 11 have the same power. Moreover, the closer the curve 11 is to the upper right, the greater the power represented. The multiple curves 12 in the figure represent the NVH performance curves of the range extender, and the NVH performance of the vehicle corresponding to the power points on the same curve 12 is the same. Moreover, the NVH performance represented by the curve 12 closer to the right is worse. Among them, the curve 12 can be used to measure the NVH standard of the vehicle, and at this time, a curve 12 can represent a preset NVH standard. The closed curve 13 represents the oil-to-electricity conversion rate curve of the vehicle, and the oil-to-electricity conversion rate corresponding to the power points on the same closed curve 13 is the same. Moreover, the smaller the closed curve 13 is, the greater the oil-to-electricity conversion rate of the power point on the closed curve 13 is. Curve 14 is the external characteristic curve of the range extender, and the power point of the range extender must be within the external characteristic curve.

[0041] Figure 3 It is another universal characteristic diagram of the range extender provided in this application.

[0042] Combination Figure 3 , curve 111 and curve 112 represent two power curves, which can represent the power of the two end points of the preset power generation range respectively. At this time, the power of the power points in the area between curve 111 and curve 112 is within the preset power generation range. Curve 121 represents the current NVH standard, so the NVH performance corresponding to the power points on the left side of the curve meets the current NVH standard. Therefore, based on curves 111, 112 and 121, the power points that meet the preset power generation range and the current NVH standard can be directly obtained. Furthermore, combined with the curve corresponding to the current oil-to-electricity conversion rate standard, a unique power point range can be obtained, which is the target power generation power point range.

[0043] The power point in the target power point range is the target power point, the power corresponding to the target power point is the target power, and the corresponding speed is the target speed. Since the power can be obtained through the torque and the speed, the target torque can be obtained through the target power and the target speed.

[0044] S13: taking a target power generation point in the target power generation point range as a target operating power generation point, and controlling the range extender to operate and generate power based on the target operating power generation point.

[0045] It should be understood that the target power point range determined by the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard generally includes multiple target power points. Therefore, we need to select a target power point from multiple target power points as the target working power point to control the range extender to work and generate power through the target speed and target torque corresponding to the target working power point.

[0046] At this time, when the range extender operates at the target operating power point, the power generation power of the range extender is within the preset power generation power range, and the NVH performance of the vehicle meets the current NVH standard, and the oil-to-electricity conversion rate of the vehicle meets the current oil-to-electricity conversion rate standard.

[0047] In summary, since the current vehicle speed corresponds to a preset power generation range, the range extender has more power generation selectivity, thereby reducing the range extender's power generation mutation to reduce the speed mutation, thereby reducing the overall fuel consumption. In addition, the target operating power generation point is obtained based on the current NVH standard and the current oil-to-electricity conversion rate standard, so that the range extender has better NVH performance and oil-to-electricity conversion rate when operating at the target operating power generation point.

[0048] Figure 4 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 4 In some specific embodiments, the step of determining the target power point range that meets the preset power generation range, the current NVH standard, and the current oil-to-electricity conversion rate standard based on the universal characteristics of the range extender, i.e., the above-mentioned step S12, includes:

[0049] S21: Determine the priority order of the three elements of the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard; wherein the priority order is an arbitrary order of the three elements.

[0050] It should be understood that since the priority order is an arbitrary order of the three elements, the priority order may include the following five types:

[0051] The first type: preset the order of power generation range, current NVH standard, and current oil-to-electricity conversion rate standard;

[0052] The second type: the order of current NVH standards, preset power generation range, and current oil-to-electricity conversion rate standards;

[0053] The third type: the order of the current oil-to-electricity conversion rate standard, the preset power generation range, and the current NVH standard;

[0054] The fourth type: the order of current NVH standards, current oil-to-electricity conversion rate standards, and preset power generation range;

[0055] Fifth type: the order of current oil-to-electricity conversion rate standard, current NVH standard, and preset power generation range.

[0056] It should be understood that different priority orders represent different emphases of the vehicle on performance. For example, in the first priority order mentioned above, the main emphasis is on the preset power generation range, that is, the main emphasis is on the power retention performance of the vehicle. In the second priority order mentioned above, the main emphasis is on the current NVH standard, that is, the main emphasis is on the NVH performance of the vehicle.

[0057] S22: Based on the universal characteristics of the range extender, a target power point range that satisfies three elements, namely, a preset power generation range, a current NVH standard, and a current oil-to-electricity conversion rate standard, is determined in order of priority.

[0058] It should be understood that Figure 2 The curves 11, 12 and closed curve 13 shown in the figure are only exemplary curves. From the perspective of plane geometry, under this curve setting, the determined target power generation point range is not affected by the priority order, that is, regardless of the priority order, the determined target power generation power range is the same. However, in many practical cases, the overlap range cannot be considered from a plane perspective. In many scenarios, the priority order will affect the final determined target power generation point range, that is, different priority orders may result in different target power generation point ranges.

[0059] The target power generation power point range that satisfies the three elements of preset power generation range, current NVH standard and current oil-to-electricity conversion rate standard is determined in order of priority. Specifically, the power point range can be determined step by step according to the order of arrangement of the elements in the priority order, and then the target power generation power point range is finally determined.

[0060] For example, the priority order is the first one above, that is, the preset power range, the current NVH standard, and the current oil-to-electric conversion rate standard. Then, at this time, the first range is first determined based on the preset power range, and then the second range is determined in the first range based on the current NVH standard, and then the third range is determined based on the current oil-to-electric conversion rate standard. The third range is the target power point range.

[0061] Figure 5 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 5 In some specific embodiments, the priority order of the three elements of the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard is determined; wherein the priority order is a step of arbitrarily arranging the three elements in sequence, that is, the above-mentioned step S21, including:

[0062] S31: Determine the current vehicle mode and the current driving mode of the vehicle; wherein the vehicle mode includes a pure electric mode and a hybrid mode, and the driving mode includes an energy-saving mode and a sports mode.

[0063] There are multiple vehicle modes for a vehicle, and this step only lists two of them by way of example. There are also multiple driving modes. When a vehicle is in different vehicle modes or different driving modes, there may be different requirements for the NVH performance and oil-to-electricity conversion rate of the vehicle, that is, there may be different requirements for the NVH performance and oil-to-electricity conversion rate of the vehicle.

[0064] S32: Determine the priority order of the three elements of preset power generation range, current NVH standard and current oil-to-electricity conversion rate standard according to the current vehicle mode and the NVH requirements, oil-to-electricity conversion rate requirements and preset relationships corresponding to the current driving mode; wherein the combination of NVH requirements and oil-to-electricity conversion rate requirements and the priority order have a preset relationship.

[0065] Among them, the combination of different vehicle modes and driving modes can establish a corresponding relationship with different NVH requirements and oil-to-electricity conversion rate requirements. After obtaining the current vehicle mode and the current driving mode, the corresponding NVH requirements and oil-to-electricity conversion rate requirements can be directly obtained based on the corresponding relationship.

[0066] Since there is a preset relationship between the combination of NVH requirements and oil-to-electricity conversion rate requirements and the priority order, after determining the NVH requirements and the oil-to-electricity conversion rate, the corresponding priority order can be directly determined based on the combination of the two and the preset relationship.

[0067] In this embodiment, the determination of the priority order fully considers the vehicle mode and driving mode of the vehicle, and can better adapt to the demand emphasis on vehicle NVH and oil-to-electricity conversion rate under the current working state of the vehicle, thereby making the setting of the priority order more reasonable.

[0068] Figure 6 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 6 In some specific embodiments, a target power point in the target power point range is used as the target working power point, and the step of controlling the range extender to work and generate power based on the target working power point, i.e., the above step S13, includes:

[0069] S41: taking a target power generation point in the target power generation point range as a first target operating power generation point.

[0070] The specific strategy for selecting a target power point from the target power point range may be to select a target power point from the target power point range whose power is the average power of all target power points in the target power point range. However, the selection method is not limited thereto, and a variety of strategies may be set, which are not specifically limited here.

[0071] S42: Acquire the current vehicle mode of the vehicle and determine the corresponding range extender starting power, and acquire the current remaining power of the battery pack of the vehicle; wherein different vehicle modes correspond to different range extender starting powers.

[0072] It should be understood that different vehicle modes generally correspond to different range extender starting power, that is, the corresponding vehicle power conservation performance requirements are different. After determining the current vehicle mode, the range extender starting power can be directly obtained according to the preset relationship.

[0073] Since the range extender will compensate the remaining power of the battery pack to the starting power of the range extender when it is working, the difference between the current remaining power of the battery pack and the starting power of the range extender will reflect the amount of power that the range extender needs to generate to a certain extent.

[0074] S43: Determine the power difference between the current remaining power and the range extender startup power, and determine a first correction coefficient based on the absolute value of the power difference; wherein the absolute value of the power difference and the first correction coefficient have a corresponding relationship, and the greater the absolute value of the power difference, the greater the first correction coefficient.

[0075] It should be understood that the larger the absolute value of the power difference, the more power the range extender needs to generate, and the range extender can be controlled to work at a higher power. At this time, the first correction coefficient is a positive value, and we set the first correction coefficient to reflect the amount of power the range extender needs to generate, that is, the larger the first correction coefficient, the more power the range extender needs to generate.

[0076] S44: Multiply the power corresponding to the first target working power generation point by the first correction coefficient to obtain the target power generation power, take the target power generation point in the target power generation point range whose power is equal to the target power generation power as the second target working power generation point, and control the operation of the range extender based on the second target working power generation point.

[0077] Since the first correction coefficient is a positive value, and the larger the power difference is, the larger the first correction coefficient is. Therefore, when the power difference is larger, the target power generation power determined by the above steps is larger, and the range extender can generate more power, which is in line with the actual application scenario. At this time, the first correction coefficient can be less than 1 or greater than 1, without specific limitation.

[0078] Among them, the second target operating power generation point is a power point belonging to the target power generation point range, so the power of the second target operating power generation point is within the power range corresponding to the target power generation point range. If the target power generation power is greater than the maximum power of the power range corresponding to the target power generation point range, the target power generation point corresponding to the maximum power of the power range corresponding to the target power generation point range is used as the second target operating power generation point. If the target power generation power is less than the minimum power of the power range corresponding to the target power generation point range, the target power generation point corresponding to the minimum power of the power range corresponding to the target power generation point range is used as the second target operating power generation point.

[0079] Based on this embodiment, the determined first target operating power point is corrected through the vehicle mode to obtain the second target operating power point, so that the range extender is more in line with the power generation power requirement of the current vehicle mode when operating at the second target operating power point.

[0080] Figure 7 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 7 In some specific embodiments, a target power point in the target power point range is used as the target working power point, and the step of controlling the range extender to work and generate power based on the target working power point, i.e., the above step S13, includes:

[0081] S51: taking a target power generation point in the target power generation point range as a first target operating power generation point.

[0082] Similarly, for a specific strategy of selecting a target power point from the target power point range, it can be to select a target power point from the target power point range whose power is the average power of all target power points in the target power point range. However, the selection method is not limited to this, and multiple strategies can be set, which is not specifically limited here.

[0083] S52: Acquire the current driving mode of the vehicle and determine a second correction coefficient based on the current driving mode; wherein there is a corresponding relationship between the driving mode and the second correction coefficient.

[0084] It should be understood that different driving modes have different requirements for the vehicle's power conservation performance, and therefore have different requirements for the power generation capacity of the range extender. At this time, there is a corresponding relationship between different driving modes and different second correction coefficients. In addition, the second correction coefficient is a positive value, and the second correction coefficient can be greater than 1 or less than 1.

[0085] S53: Multiply the power corresponding to the first target working power generation point by the second correction coefficient to obtain the target power generation power, take the target power generation point in the target power generation point range whose power is equal to the target power generation power as the second target working power generation point, and control the operation of the range extender based on the second target working power generation point.

[0086] Similarly, the power of the second target operating power generation point is within the power range corresponding to the target power generation point range. If the target power generation power is greater than the maximum power of the power range corresponding to the target power generation point range, the target power generation point corresponding to the maximum power of the power range corresponding to the target power generation point range is used as the second target operating power generation point. If the target power generation power is less than the minimum power of the power range corresponding to the target power generation point range, the target power generation point corresponding to the minimum power of the power range corresponding to the target power generation point range is used as the second target operating power generation point.

[0087] This embodiment provides another method for correcting the first target operating power point, that is, correcting it through the current driving mode of the vehicle, so that the final second target operating power point is more in line with the specific requirements of the current driving mode for the power generation size of the range extender.

[0088] Of course, the above embodiments can be combined to correct the first target working power point by using the first correction coefficient and the second correction coefficient at the same time, so that the final second target working power point can better meet the requirements of the range extender power generation size in the current vehicle mode and the current driving mode.

[0089] In the embodiment combined with the above embodiment, the method of determining the first correction coefficient and the second correction coefficient remains unchanged, but after determining the first correction coefficient and the second correction coefficient, the first target working power generation power is multiplied by the first correction coefficient and the second correction coefficient respectively to obtain the target power generation power. Further, the target power generation power point with power equal to the target power generation power in the target power generation power point range is used as the second target working power generation power point, and the range extender is controlled to work based on the second target working power generation power point.

[0090] Figure 8 FIG. 1 is a flow chart of another embodiment of the control method of the vehicle range extender provided by the present application. Figure 8 In some specific embodiments, before the step of obtaining the current speed of the vehicle and determining the preset power generation range corresponding to the current speed, and obtaining the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle, that is, before the above step S11, it includes:

[0091] S61: Based on the configuration of the vehicle, a first required power generation power and a second required power generation power corresponding to a first endpoint value and a second endpoint value of a preset vehicle speed range are obtained respectively; wherein the preset vehicle speed range is set to be multiple and connected in sequence.

[0092] Specifically, the number and width of the preset speed ranges can be set according to actual conditions, and the width of the preset speed range can be set to be smaller, for example, the maximum speed difference of each preset speed range is 3km / h, 5km / h, etc. In this case, a larger number of preset speed ranges can be set, thereby basically covering the speed conditions in the vehicle driving scene.

[0093] The following table is a schematic diagram of the first required power generation power and the second required power generation power corresponding to the first endpoint value and the second endpoint value of multiple preset vehicle speed ranges.

[0094]

[0095] In combination with the above table, for the first endpoint value 10 of the preset vehicle speed range of 0-20, the first required power is 0, and the second required power is 5. For the first endpoint value 20 of the preset vehicle speed range of 20-40, the first required power is 5, and the second required power is 10. Of course, the above table only exemplarily shows part of the relevant data of the preset vehicle speed range, and exemplarily shows that the maximum difference in vehicle speed of the preset vehicle speed range is 20 km / h.

[0096] S62: Using the power generation range determined by the first required power generation and the second required power generation as the preset power generation range corresponding to the preset vehicle speed range, and establishing a preset corresponding relationship between the preset vehicle speed range and the preset power generation range.

[0097] Combined with the above content, at this time, the preset power generation range corresponding to the preset vehicle speed range of 0-20 is 0-5, the preset power generation range corresponding to the preset vehicle speed range of 20-40 is 5-10, the preset power generation range corresponding to the preset vehicle speed range of 40-60 is 10-15, the preset power generation range corresponding to the preset vehicle speed range of 60-80 is 15-20, and the preset power generation range corresponding to the preset vehicle speed range of 80-100 is 20-28.

[0098] In summary, the preset power generation range determined by the above method meets the actual needs of vehicle driving.

[0099] The specific method of selecting the target power generation point is defined as follows:

[0100] In some specific embodiments, the step of taking a target power generation point within the target power generation point range as the target working power generation point includes: determining the oil-to-electricity conversion rate corresponding to each target power generation point within the target power generation point range, and taking the target power generation point with the highest oil-to-electricity conversion rate as the target working power generation point.

[0101] It should be understood that in this embodiment, after determining the target power point range, the point with the highest oil-to-electricity conversion rate will be used as the target power point, thereby ensuring that the vehicle has good oil-to-electricity conversion performance. In combination with the above content, in the above embodiment involving the first target working power point, the first target working power point can be obtained through this embodiment, that is, the point with the highest oil-to-electricity conversion rate is used as the first target working power point.

[0102] A second aspect of the present application provides a control device 20 for a vehicle range extender, Fig. 9 It is a structural block diagram of an embodiment of the control device 20 of the vehicle range extender provided in the present application.

[0103] Combination Fig. 9 The control device 20 of the vehicle range extender includes an acquisition module 21 and a control module 22. The acquisition module 21 is used to acquire the current speed of the vehicle and determine the preset power generation range corresponding to the current speed, and acquire the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle; wherein, there is a preset corresponding relationship between the preset power generation range and the preset vehicle speed range. The control module 22 is used to determine the target power generation point range that meets the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard based on the universal characteristics of the range extender; wherein, the target power generation point includes the target power and the target speed; and a target power generation point in the target power generation point range is used as the target working power generation point, and the range extender is controlled to work and generate power based on the target working power generation point.

[0104] A third aspect of the present application provides an electronic device, comprising: a processor; and a memory for storing a computer program, which, when executed by the processor, implements the control method of the vehicle range extender in any of the above embodiments.

[0105] Fig.10 It is a schematic diagram of the structural framework of an embodiment of the electronic device 500 provided in the present application.

[0106] In some specific embodiments, the electronic device 500 includes a central processing unit (CPU) 501 and a read-only memory (ROM) 502, wherein the CPU 501 is a processor and the ROM 502 is a memory. The CPU 501 can perform various appropriate actions and processes according to the program stored in the ROM 502 or the program loaded from the storage part 508 to the random access memory (RAM) 503, such as executing the method in the above embodiment. In the RAM 503, various programs and data required for system operation are also stored. The CPU 501, the ROM 502 and the RAM 503 are connected to each other via a bus 504. The input / output (I / O) interface 505 is also connected to the bus 504.

[0107] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed so that a computer program read therefrom is installed into the storage section 508 as needed.

[0108] In particular, according to an embodiment of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 509, and / or installed from a removable medium 511. When the computer program is executed by a central processing unit (CPU) 501, various functions defined in the system of the present application are executed.

[0109] A fourth aspect of the present application provides a computer-readable storage medium 40, Fig.11It is a schematic diagram of the structural framework of an embodiment of the computer-readable storage medium 40 provided in the present application.

[0110] The computer readable storage medium 40 stores a computer program 41 , and when the computer program 41 is executed by a processor, the control method of the vehicle range extender in any of the above embodiments is implemented.

[0111] It should be noted that the computer-readable medium 40 shown in the embodiment of the present application can be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium can be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media can include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it. In the present application, a computer-readable signal medium can include a data signal propagated in a baseband or as a part of a carrier wave, wherein a computer-readable computer program is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, which may send, propagate, or transmit programs for use by or in conjunction with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0112] In summary, based on the control method, device, electronic device and storage medium of the vehicle range extender provided by the present application, the method includes: obtaining the current speed of the vehicle and determining the preset power generation range corresponding to the current speed, and obtaining the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle; wherein, there is a preset corresponding relationship between the preset power generation range and the preset speed range; based on the universal characteristics of the range extender, determine the target power generation point range that meets the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard; wherein, the target power generation point includes the target power and the target speed; a target power generation point in the target power generation point range is used as the target working power generation point, and the range extender is controlled to work and generate electricity based on the target working power generation point. Therefore, the current vehicle speed corresponds to a preset power generation range, so that the range extender has more power generation selectivity, thereby reducing the power generation mutation of the range extender to reduce the speed mutation, thereby reducing the comprehensive fuel consumption. In addition, the target working power generation point is obtained based on the current NVH standard and the current oil-to-electricity conversion rate standard, so that the NVH performance and oil-to-electricity conversion rate of the range extender when working at the target working power generation point are better.

[0113] The above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person skilled in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.

Claims

1. A control method for a vehicle range extender, characterized in that: include: Acquire the current speed of the vehicle and determine the preset power generation range corresponding to the current speed, and acquire the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle; wherein there is a preset corresponding relationship between the preset power generation range and the preset speed range; Based on the universal characteristics of the range extender, a target power point range that meets the preset power generation range, the current NVH standard, and the current oil-to-electricity conversion rate standard is determined; wherein the target power point includes a target power and a target speed; One of the target power generation points in the target power generation point range is used as a target operating power generation point, and the range extender is controlled to operate and generate power based on the target operating power generation point.

2. The control method of a vehicle range extender according to claim 1, characterized in that: The step of determining a target power point range that satisfies the preset power generation range, the current NVH standard, and the current oil-to-electricity conversion rate standard based on the universal characteristics of the range extender comprises: Determine the priority order of the three elements of the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard; wherein the priority order is an arbitrary order of the three elements; Based on the universal characteristics of the range extender, a target power generation point range that sequentially satisfies the three elements of the preset power generation range, the current NVH standard, and the current oil-to-electricity conversion rate standard is determined in accordance with the priority order.

3. The control method of the vehicle range extender according to claim 2, characterized in that: The step of determining the priority order of the three elements of the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard, wherein the priority order is an arbitrary order of the three elements, comprises: Determining a current vehicle mode and a current driving mode of the vehicle; wherein the vehicle mode includes a pure electric mode and a hybrid mode, and the driving mode includes an energy-saving mode and a sports mode; According to the NVH requirements, oil-to-electricity conversion rate requirements and preset relationships corresponding to the current vehicle mode and the current driving mode, the priority order of the three elements, the preset power generation range, the current NVH standard and the current oil-to-electricity conversion rate standard, is determined; wherein the combination of the NVH requirement and the oil-to-electricity conversion rate requirement has the preset relationship with the priority order.

4. The control method of a vehicle range extender according to claim 1, characterized in that: The step of taking one of the target power generation points in the target power generation point range as a target working power generation point, and controlling the range extender to work and generate power based on the target working power generation point, comprises: Taking one of the target power generation points within the target power generation point range as a first target operating power generation point; Acquire the current vehicle mode of the vehicle and determine the corresponding range extender startup power, and acquire the current remaining power of the battery pack of the vehicle; wherein different vehicle modes correspond to different range extender startup powers; Determine the power difference between the current remaining power and the range extender startup power, and determine a first correction coefficient based on the absolute value of the power difference; wherein there is a corresponding relationship between the absolute value of the power difference and the first correction coefficient, and the greater the absolute value of the power difference, the greater the first correction coefficient; The power corresponding to the first target operating power generation point is multiplied by the first correction coefficient to obtain the target power generation power, the target power generation point in the target power generation point range whose power is equal to the target power generation power is used as the second target operating power generation point, and the range extender is controlled to operate based on the second target operating power generation point.

5. The control method of a vehicle range extender according to claim 4, characterized in that: The step of taking one of the target power generation points in the target power generation point range as a target working power generation point, and controlling the range extender to work and generate power based on the target working power generation point, comprises: Taking one of the target power generation points within the target power generation point range as a first target operating power generation point; Acquiring a current driving mode of the vehicle and determining a second correction coefficient based on the current driving mode; wherein there is a corresponding relationship between the driving mode and the second correction coefficient; The power corresponding to the first target operating power generation point is multiplied by the second correction coefficient to obtain the target power generation power, the target power generation point in the target power generation point range whose power is equal to the target power generation power is used as the second target operating power generation point, and the range extender is controlled to operate based on the second target operating power generation point.

6. The control method of a vehicle range extender according to claim 1, characterized in that: Before the steps of obtaining the current speed of the vehicle and determining the preset power generation range corresponding to the current speed, and obtaining the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle, the method includes: Based on the configuration of the vehicle, a first required power generation power and a second required power generation power corresponding to a first endpoint value and a second endpoint value of a preset vehicle speed range are obtained, respectively; wherein the preset vehicle speed range is set to be multiple and connected in sequence; The power generation range determined by the first required power generation and the second required power generation is used as the preset power generation range corresponding to the preset vehicle speed range, and a preset corresponding relationship between the preset vehicle speed range and the preset power generation range is established.

7. The control method of a vehicle range extender according to claim 1, characterized in that: The step of taking one of the target power generation points in the target power generation point range as the target working power generation point comprises: The oil-to-electricity conversion rate corresponding to each of the target power generation points in the target power generation point range is determined, and the target power generation point with the highest oil-to-electricity conversion rate is used as the target working power generation point.

8. A control device for a vehicle range extender, characterized in that: include: An acquisition module, used to acquire the current speed of the vehicle and determine a preset power generation range corresponding to the current speed, and acquire the current NVH standard and the current oil-to-electricity conversion rate standard of the vehicle; wherein there is a preset corresponding relationship between the preset power generation range and the preset vehicle speed range; A control module is used to determine a target power generation point range that meets the preset power generation range, the current NVH standard, and the current oil-to-electricity conversion rate standard based on the universal characteristics of the range extender; wherein the target power generation point includes a target power and a target speed; and one of the target power generation points in the target power generation point range is used as a target working power generation point, and the range extender is controlled to operate and generate power based on the target working power generation point.

9. An electronic device, characterized in that: include: processor; A memory for storing a computer program, wherein when the computer program is executed by the processor, the control method of the vehicle range extender according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, and when the computer program is executed by the processor, the control method of the vehicle range extender according to any one of claims 1 to 7 is implemented.

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