Running control method and device of range extender, equipment and medium

Abstract

The invention discloses an operation control method and device of a range extender, equipment and a medium, and belongs to the technical field of vehicles. The method comprises the following steps: acquiring required generated power of a generator in the range extender; selecting corresponding target working condition data from the multiple working condition data based on the required generation power, and obtaining a target rotating speed and a target torque in the target working condition data; wherein the working condition data is the working condition data of the range extender when the power generation efficiency of the range extender meets the preset efficiency condition, and the working condition data comprises the rotating speed and the corresponding torque; controlling an engine in the range extender to operate according to the target torque; acquiring the actual rotating speed of the generator when the engine in the range extender is controlled to operate according to the target torque and the generator is controlled to operate according to the target rotating speed; adjusting the target torque based on the rotating speed deviation between the actual rotating speed and the target rotating speed; and controlling the generator to operate according to the adjusted target torque to enable the rotating speed of the generator to reach the target rotating speed.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an operation control method, device, equipment and medium for a range extender. Background Art

[0002] For extended-range vehicles, the range extender consists of an engine and a generator, which can be connected directly or via a speed-increasing gear. When the range extender is running, the engine drives the generator to generate electricity. The range extender is decoupled from the vehicle's drive system, responsible only for power generation. The vehicle controller requests the range extender to operate at a specific operating point based on power generation requirements. Due to the decoupling nature of the range extender, its speed and torque can be selected according to specific rules. Typically, the selection of the range extender's power generation operating point focuses on economic efficiency.

[0003] Reference Figure 2 The general principle of operation of a range extender is: power generation → mechanical power after considering power generation efficiency → selection of the optimal power generation operating point (i.e., target speed and target torque are selected. When the range extender is set according to the target speed and target torque, the power generation efficiency of the range extender is optimal) → target speed is input to the generator: target torque is input to the engine. At the same time, if the generator speed deviates from the target speed, the target torque of the engine can be adjusted based on the speed control of the target speed (corresponding to the speed control torque in the figure). In other words, the engine torque is adjusted to maintain the stability of the generator at the target speed. For a directly connected range extender system, the engine torque and the generator torque are equal in magnitude and opposite in direction to maintain a balanced speed. For example, the engine torque is 150N and the generator torque is -150N, maintaining a certain stable speed. Torque imbalance will cause the speed to rise or fall.

[0004] There is a problem when the range extender is operating at the selected operating point: due to the consistency of the engine and generator components, there is a difference between the actual output torque of the engine and the model torque calibrated on the test bench, and the engine torque deviation is large. At present, the power generation control of the range extender is controlled by the generator to control the speed and the engine to control the torque. Due to the existence of errors, the actual torque of the engine is larger or smaller than the model torque, which causes the generator speed to deviate from the target speed. In order to stabilize the speed, the generator adjusts the target torque based on the target speed and the actual speed, and corrects the engine output torque based on the adjusted target torque, that is, by increasing or decreasing the target torque of the engine to maintain the stability of the generator speed. However, the engine torque will fluctuate due to the deviation, causing the engine operating point to deviate from the target torque selected when the power generation efficiency is optimal, resulting in the power generation efficiency not being in the optimal state, thereby increasing fuel consumption. Summary of the Invention

[0005] In view of the problem that the operating point of the above-mentioned engine deviates from the target torque selected when the power generation efficiency is optimal, resulting in the power generation efficiency not being in the optimal state, the present application is proposed to provide an operation control method, device, equipment and medium of a range extender to solve the above-mentioned problem, which can prevent the power generation efficiency from being in the optimal state, thereby reducing fuel consumption.

[0006] In a first aspect, the present application provides an operation control method for a range extender, the method comprising:

[0007] Obtaining the required power generation power of the generator in the range extender;

[0008] Based on the required generated power, corresponding target operating condition data is selected from a plurality of operating condition data, and a target speed and a target torque in the target operating condition data are obtained; wherein the operating condition data is the operating condition data of the range extender when the power generation efficiency of the range extender meets a preset efficiency condition, and the operating condition data includes a speed and a corresponding torque;

[0009] controlling the operation of the engine in the range extender according to the target torque;

[0010] obtaining an actual speed of the generator when the engine in the range extender is controlled to operate according to the target torque and the generator is controlled to operate according to the target speed;

[0011] adjusting the target torque based on a speed deviation between the actual speed and the target speed;

[0012] The generator is controlled to operate according to the adjusted target torque so that the rotational speed of the generator reaches the target rotational speed.

[0013] In one embodiment, adjusting the target torque based on a speed deviation between the actual speed and the target speed includes:

[0014] determining a torque deviation based on the speed deviation;

[0015] determining a generator torque based on the torque deviation and the target torque;

[0016] The target torque is adjusted to the generator torque, and the generator torque is used as the adjusted target torque.

[0017] In one embodiment, determining the torque deviation based on the speed deviation includes:

[0018] The speed deviation is used as the error value in the proportional integral differential algorithm;

[0019] The error value is brought into a proportional-integral-differential algorithm for calculation to obtain the torque deviation.

[0020] In one embodiment, obtaining the required power generation power of the generator in the range extender includes:

[0021] Obtaining the initial required power generation and actual power generation of the generator in the range extender;

[0022] The initial required power generation power is adjusted based on the actual power generation power to obtain the required power generation power.

[0023] In one embodiment, obtaining the initial required power generation and the actual power generation of the generator in the range extender includes:

[0024] Acquiring accelerator pedal opening information, and determining the initial required power generation power based on the opening information;

[0025] selecting corresponding initial operating condition data from the plurality of operating condition data according to the initial required generated power, and obtaining an initial speed and an initial torque in the initial operating condition data;

[0026] controlling the generator to operate according to the initial speed, and controlling the engine to operate according to the initial torque;

[0027] acquiring the current and voltage of the generator when the generator is controlled to operate according to the initial speed and the engine is controlled to operate according to the initial torque;

[0028] The actual generated power is determined based on the current and voltage.

[0029] In one embodiment, adjusting the initial required power generation power based on the actual power generation power to obtain the required power generation power includes:

[0030] determining a power difference between the initial required generated power and the actual generated power;

[0031] The sum of the initial required generated power and the power difference is calculated, and the obtained sum is used as the required generated power.

[0032] In one embodiment, before obtaining the required power generation power of the generator in the range extender, the method further includes:

[0033] Determine whether the vehicle has entered the series power generation mode;

[0034] The obtaining the required power generation power of the generator in the range extender includes:

[0035] When the vehicle enters the series power generation mode, the required power generation power of the generator in the range extender is obtained.

[0036] In a second aspect, the present application provides an operation control device for a range extender, the device comprising:

[0037] A first acquisition module is used to obtain the required power generation power of the generator in the range extender;

[0038] a second acquisition module, configured to select corresponding target operating condition data from a plurality of operating condition data based on the required generated power, and obtain a target speed and a target torque from the target operating condition data; wherein the operating condition data is the operating condition data of the range extender when the power generation efficiency of the range extender meets a preset efficiency condition, and the operating condition data includes a speed and a corresponding torque;

[0039] a first control module, configured to control the operation of the engine in the range extender according to the target torque;

[0040] a third acquisition module, configured to acquire an actual speed of the generator when the engine in the range extender is controlled to operate according to the target torque and the generator is controlled to operate according to the target speed;

[0041] an adjusting module, configured to adjust the target torque based on a speed deviation between the actual speed and the target speed;

[0042] The second control module is configured to control the operation of the generator according to the adjusted target torque so that the rotational speed of the generator reaches the target rotational speed.

[0043] In a third aspect, the present application provides an electronic device comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, computer instructions are stored in the memory, and the processor executes the method described in the first aspect by executing the computer instructions.

[0044] In a fourth aspect, the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method described in the first aspect.

[0045] The technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0046] After obtaining the required power generation power of the generator in the range extender, the present application can select corresponding target operating condition data from multiple operating condition data based on the required power generation power, and obtain the target speed and target torque in the target operating condition data; wherein the operating condition data is the operating condition data of the range extender when the power generation efficiency of the range extender meets the preset efficiency condition, and the operating condition data includes the speed and the corresponding torque; the operation of the engine in the range extender is controlled according to the target torque, and at the same time, the actual speed of the generator when the engine operation in the range extender is controlled according to the target torque and the generator operation is controlled according to the target speed is obtained, and the target torque is adjusted based on the speed deviation between the actual speed and the target speed, and the operation of the engine in the range extender is controlled according to the target torque. This can ensure that the operation of the engine does not deviate from the target torque selected when the power generation efficiency meets the preset efficiency condition, and the generator torque is dynamically adjusted to maintain the target speed. This setting can ensure that the power generation efficiency meets the preset efficiency condition, so that the power generation efficiency is in the optimal state, thereby reducing fuel consumption.

[0047] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means 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 present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0049] Figure 1 is a schematic diagram of the optimal operating condition line;

[0050] Figure 2 This is the schematic diagram of the existing scheme;

[0051] Figure 3 This is a schematic diagram of the operating points of the range extender in the existing solution;

[0052] Figure 4 This is a flow chart of an operation control method of a range extender provided in an embodiment of the present application;

[0053] Figure 5 This is a schematic diagram of an operation control method of a range extender of the present application;

[0054] Figure 6 This is a schematic diagram of the operating condition points of a range extender in an operation control method of a range extender of the present application;

[0055] Figure 7This is a comparison chart of the operating conditions of the range extender of the existing solution and the solution of this application;

[0056] Figure 8 This is a schematic structural diagram of an operation control device for a range extender provided in an embodiment of the present application;

[0057] Figure 9 A schematic diagram of the structure of an electronic device. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings. It should be understood that the embodiments of the present disclosure and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0059] Among them, for the power generation operating point, the appropriate operating point (i.e., target speed and target torque) is selected according to the universal characteristics of the engine and generator and different power generation requirements, with the lowest fuel consumption and the highest power generation efficiency being the priority.

[0060] the following Figure 1 For example, the optimal power generation operating point can be selected according to the characteristics of the range extender. The optimal power generation operating point refers to the point on the optimal power generation operating line. Figure 1 The horizontal axis is the engine speed, the vertical axis is the engine model torque, and the engine fuel consumption line and the required power generation power-isopower line are marked in the figure.

[0061] As mentioned above, there is a problem when the range extender is operating according to the selected operating point: due to the consistency of components of the engine and the generator, there is a difference between the actual output torque of the engine and the model torque calibrated on the test bench, and the engine torque deviation is large. The torque deviation refers to the difference between the actual torque of the engine and the model torque calibrated on the test bench. The torque deviation of the engine torque > 100N is usually required to be controlled within 5%.

[0062] Due to the existence of errors, the actual torque of the engine is larger or smaller than the model torque, which causes the generator speed to deviate from the target speed. Figure 2 In order to stabilize the speed, the generator adjusts the target torque based on the target speed and the actual speed, and corrects the output torque of the engine based on the adjusted target torque, that is, by increasing or decreasing the target torque of the engine, the speed of the generator is maintained stable. Figure 2The target power generation is the power generation required by the range extender, the target mechanical power is the actual power generation when the range extender meets the power generation efficiency requirements, the generator has parameters such as output current, voltage and actual power generation, and the engine has parameters such as engine speed and engine torque.

[0063] The current method will cause the engine's operating point to deviate from the target torque selected when the power generation efficiency is optimal, resulting in the power generation efficiency not being in the optimal state, such as Figure 3 As shown in the figure, the actual operation of the engine is shown in the figure. The actual operating condition of the engine fluctuates around the optimal operating condition, resulting in the power generation efficiency not being in the optimal state, thereby increasing fuel consumption.

[0064] In order to solve the problem of deviation from the optimal operating point, this application solution is proposed. Figure 4 This is a flow chart of an operation control method of a range extender provided in an embodiment of the present application. Figure 4 As shown, the method can be executed by the operation control system of the range extender, and the method includes:

[0065] Step S401: obtaining the required power generation power of the generator in the range extender;

[0066] The required power generation power of the generator is the power generation power required by the generator. In order to accurately respond to the power generation demand problem, it is necessary to ensure that the actual output power can meet the required power generation power.

[0067] Step S402: Based on the required power generation, corresponding target operating condition data is selected from the plurality of operating condition data, and a target speed and a target torque in the target operating condition data are obtained; wherein the operating condition data is the operating condition data of the range extender when the power generation efficiency of the range extender meets a preset efficiency condition, and the operating condition data includes the speed and the corresponding torque;

[0068] like Figure 1 As shown, when the range extender selects the optimal operating point (different operating points correspond to different horizontal and vertical coordinates, that is, corresponding to different engine speeds and engine model torques. As mentioned above, the speed corresponding to the optimal operating point is input to the generator, and the torque corresponding to the optimal operating point is input to the engine), the power generation efficiency of the range extender is optimal. In this embodiment, the power generation efficiency of the range extender satisfies the preset efficiency condition, which means that the power generation efficiency of the range extender is the optimal value.

[0069] For each of the multiple operating condition data, the operating condition data is the operating condition data of the range extender when the power generation efficiency of the range extender is the optimal value, that is, the operating condition data corresponding to the optimal operating point, and each operating condition data includes the speed and torque corresponding to the optimal operating point.

[0070] In this embodiment, multiple operating condition data refer to the operating condition data corresponding to multiple operating points on the optimal operating condition line. Different operating condition data correspond to different required power generation powers. The correspondence between the operating condition data and the required power generation powers is obtained in advance through a large number of experiments.

[0071] After the required generated power is obtained, target operating condition data corresponding to the required generated power may be selected from a plurality of operating condition data, thereby obtaining the target speed and target torque included in the target operating condition data.

[0072] Compared with the existing method of maintaining the stability of the generator speed by increasing or decreasing the target torque of the engine, the technical concept of the present application is to keep the optimal operating point (selected speed and torque) unchanged and dynamically adjust the generator torque to maintain the target speed.

[0073] Step S403: Control the operation of the engine in the range extender according to the target torque;

[0074] Step S404: obtaining the actual speed of the generator when the engine in the range extender is controlled to operate according to the target torque and the generator is controlled to operate according to the target speed;

[0075] Step S405: adjusting the target torque based on the speed deviation between the actual speed and the target speed;

[0076] Step S406: Control the generator to operate according to the adjusted target torque so that the generator speed reaches the target speed.

[0077] The operation control system can first control the operation of the engine in the range extender according to the target torque, and control the operation of the generator according to the target speed, obtain the actual speed of the generator under this operating condition, determine the speed deviation between the actual speed and the target speed, and increase or decrease the target torque based on the speed deviation. The purpose is to ensure that when the generator is controlled to operate according to the adjusted target torque, the actual output speed of the generator can reach the target speed.

[0078] The operation control system controls the operation of the engine in the range extender according to the target torque, and controls the operation of the generator according to the adjusted target torque, so that the generator speed reaches the target speed, that is, the generator torque is dynamically adjusted to maintain the target speed, while the engine's operating torque will not be changed. The engine still runs according to the target torque, which can keep the range extender running at the optimal operating point and ensure that the power generation efficiency is optimal.

[0079] It can be seen that after obtaining the required power generation power of the generator in the range extender, the present application can select corresponding target operating condition data from multiple operating condition data based on the required power generation power, and obtain the target speed and target torque in the target operating condition data; wherein the operating condition data is the operating condition data of the range extender when the power generation efficiency of the range extender meets the preset efficiency condition, and the operating condition data includes the speed and the corresponding torque; the operation of the engine in the range extender is controlled according to the target torque, and at the same time, the actual speed of the generator when the engine operation in the range extender is controlled according to the target torque and the generator operation is controlled according to the target speed is obtained, and the target torque is adjusted based on the speed deviation between the actual speed and the target speed, and the operation of the engine in the range extender is controlled according to the target torque. This ensures that the operation of the engine does not deviate from the target torque selected when the power generation efficiency meets the preset efficiency condition, and dynamically adjusts the generator torque to maintain the target speed. This setting can ensure that the power generation efficiency meets the preset efficiency condition, so that the power generation efficiency is in the optimal state, thereby reducing fuel consumption.

[0080] In one embodiment, adjusting the target torque based on the speed deviation between the actual speed and the target speed includes: determining a torque deviation based on the speed deviation; determining a generator torque based on the torque deviation and the target torque; adjusting the target torque to the generator torque, and using the generator torque as the adjusted target torque.

[0081] In this embodiment, the speed deviation is equal to the target speed minus the actual speed, and the speed deviation can be a positive number or a negative number;

[0082] The torque deviation can be calculated based on the speed deviation and the Proportional-Integral-Differentiation (PID) algorithm;

[0083] The control system is operated to calculate the sum of the torque deviation and the target torque, and the sum is used as the generator torque. Then, the target torque is adjusted to the generator torque, and the generator torque is the adjusted target torque.

[0084] In one embodiment, determining the torque deviation based on the speed deviation includes: using the speed deviation as an error value in a proportional-integral-differential algorithm; and bringing the error value into the proportional-integral-differential algorithm for calculation to obtain the torque deviation.

[0085] The specific calculation formula of the proportional integral differential algorithm is as follows:

[0086] The torque deviation is T2, T2 = Kp·d(n)+Ki·∫d(n)dt+Kd·dd(n) / dt, "·" in all formulas of this application is a multiplication sign, and " / " in all formulas of this application is a division sign, Kp is the proportional coefficient, Ki is the integral time constant, Kd is the differential time constant, d(n) is the speed deviation, and t is time.

[0087] d(n)=N1-N2, “-” is a minus sign, N1 is the target speed, and N2 is the actual speed.

[0088] It can be seen that the present application can calculate the torque deviation based on the speed deviation, thereby dynamically adjusting the generator torque to maintain the target speed to ensure that the power generation efficiency meets the preset efficiency conditions, so that the power generation efficiency is in the optimal state.

[0089] The control diagram of this application is shown in Figure 5 below. The actual operation of the engine is shown in Figure 6 , it can be seen that the operating point of the range extender fluctuates around the optimal operating point, but is always on the optimal operating line.

[0090] This application keeps the operating point unchanged and dynamically adjusts the generator torque to maintain the target speed. However, this will lead to the problem that the increase or decrease of the generator torque will cause the actual power generation to change. Therefore, in order to accurately respond to the power generation demand problem, it is necessary to set the initial required power generation power and obtain the actual output power of the range extender under the initial required power generation power condition. By comparing the deviation between the actual power generation power of the generator and the initial required power generation power, the initial required power generation power can be corrected to obtain the final required power generation power so that the actual output power can meet the initial required power generation power. The specific solution is as follows:

[0091] In one embodiment, obtaining the required power generation power of the generator in the range extender includes: obtaining an initial required power generation power and an actual power generation power of the generator in the range extender; and adjusting the initial required power generation power based on the actual power generation power to obtain the required power generation power.

[0092] In this embodiment, the initial required power generation power is the power generation power of the range extender required by the user; the initial required power generation power can be increased or decreased based on the actual power generation power to obtain the required power generation power.

[0093] In one embodiment, obtaining the initial required power generation and actual power generation of the generator in the range extender includes: obtaining the opening information of the accelerator pedal, and determining the initial required power generation based on the opening information; selecting corresponding initial operating condition data from multiple operating condition data based on the initial required power generation, and obtaining the initial speed and initial torque in the initial operating condition data; controlling the operation of the generator according to the initial speed, and controlling the operation of the engine according to the initial torque; obtaining the current and voltage of the generator when the operation of the generator is controlled according to the initial speed and the operation of the engine is controlled according to the initial torque; and determining the actual power generation based on the current and voltage.

[0094] In one embodiment, determining the initial required power generation based on the opening information specifically includes: determining the driving torque based on the accelerator pedal opening information, and determining the initial required power generation based on the driving torque. The initial required power generation is set to P1, and the specific calculation formula is as follows:

[0095] The initial required power generation power P1 = T0 * N / 9550 + P0, where T0 is the driving torque determined by the driver's accelerator pedal opening, N0 is the motor speed; P0 is the power of on-board electrical appliances, such as air conditioners and refrigerators;

[0096] The initial required power generation power corresponds to the following Figure 5 The target power generation in Figure 5 The working principle of the mid-range extender is to generate power based on the initial demand, which is consistent with the above Figure 4 The embodiment scheme is similar, and the corresponding initial operating condition data is selected from the multiple operating condition data. The initial speed and initial torque in the initial operating condition data are defined in the same manner as in the above embodiment, and are also the operating condition data corresponding to the multiple operating condition points on the optimal operating condition line, and will not be described in detail here.

[0097] The generator is controlled to operate according to the initial speed, the engine is controlled to operate according to the initial torque, and the current and voltage of the generator of the range extender in this operating state are obtained, so as to calculate the actual generated power based on the current and voltage. The calculation formula of the actual generated power is as follows: actual generated power P3 = U*I, where U and I are the current and voltage of the generator, respectively.

[0098] In one embodiment, adjusting the initial required power generation power based on the actual power generation power to obtain the required power generation power includes: determining the power difference between the initial required power generation power and the actual power generation power; calculating the sum of the initial required power generation power and the power difference, and using the obtained sum as the required power generation power.

[0099] In this embodiment, the power difference is equal to the initial required power generation power minus the actual power generation power; the required power generation power is equal to the sum of the initial required power generation power and the power difference.

[0100] In this embodiment, the initial required power generation power is adjusted based on the actual power generation power. After obtaining the required power generation power, the initial required power generation power can be adjusted to the required power generation power (corresponding to Figure 5 The target generated power is corrected in the adjusted target power generation method, so that the corresponding optimal operating point is selected according to the required generated power, and the target torque and target speed in the optimal operating point are determined. Then, the engine in the range extender is controlled to operate according to the target torque, and the generator is controlled to operate according to the adjusted target torque, so that after the speed of the generator reaches the target speed, the actual generated power of the generator is just the initial required generated power, thereby ensuring that the actual output power can meet the initial required generated power.

[0101] In this embodiment, the corrected power generation power, i.e., the required power generation power P2 = P1 + (P1 - P3);

[0102] In one embodiment, the corresponding target operating condition data is selected based on the required power generation power, specifically including: calculating the target mechanical power based on the required power generation power and the power generation efficiency of the range extender (or the power generation efficiency of the generator), and selecting the target speed and target torque according to the optimal operating condition line based on the target mechanical power; the target speed and target torque are N1 and T1, respectively.

[0103] In this embodiment, the target mechanical power of the generator P4=P2 / η, where η is the power generation efficiency of the generator.

[0104] In one embodiment, before obtaining the required power generation power of the generator in the range extender, the method further includes: determining whether the vehicle enters the series power generation mode; obtaining the required power generation power of the generator in the range extender includes: obtaining the required power generation power of the generator in the range extender when the vehicle enters the series power generation mode.

[0105] Series power generation mode is a hybrid configuration in which the engine does not directly drive the wheels, but instead drives a generator to generate electricity, which is then fed to the electric motor to drive the vehicle or stored in the battery. This application solution is implemented when the vehicle is in series power generation mode.

[0106] In summary, the overall solution of this application is as follows:

[0107] Step 1: Determine whether the vehicle enters the series power generation mode;

[0108] Step 2: If yes, calculate the initial required power generation power P1;

[0109] Step 3: Calculate the required power generation P2, P2 = P1 + (P1 - P3), where P3 is the actual power generation of the generator, P3 = U * I;

[0110] If the actual power generation power is less than the initial required power generation power, the power generation power will be increased. For example, if the initial required power generation power is 18kw and the actual power generation power is 16kw, the corrected required power generation power = 18 + (18-16) = 20kw, until the actual power generation power reaches the required power of 18kw.

[0111] Step 4: Calculate the target mechanical power P4 of the generator, P4 = P2 / η, where η is the optimal value of the generator's power generation efficiency;

[0112] Step 5: According to the target mechanical power P4, select the target speed and target torque according to the optimal operating condition line, which are N1 and T1 respectively;

[0113] Step 6: Control the engine to execute the target torque T1 and the generator to execute the target speed. At the same time, obtain the actual speed of the generator in this state as N2, calculate the speed deviation d(n) = N1 - N2, and calculate the torque deviation T2 of the generator based on the speed deviation;

[0114] Step 7: Calculate the generator torque T3 = T1 + T2;

[0115] Step 8: Control the engine to operate according to the target torque T1 and control the generator to operate according to the generator torque T3, so that the generator speed reaches the target speed N1.

[0116] At this time, the engine speed is N1, the engine torque is T1, the generator torque is T3, the generator speed is N1, and the actual power generation power of the generator meets the initial required power generation power P1.

[0117] as follows Figure 7 As shown, the difference between the present application solution and the prior art solution lies in that when the required power generation power is constant: A is the original optimal operating point, B is the operating point of the range extender after the speed remains unchanged and the engine torque is corrected, and C is the operating point of the range extender in the present application solution.

[0118] It can be seen that the operating point of the range extender fluctuates around the optimal operating point, but is always on the optimal operating line, which can ensure that the power generation efficiency meets the preset efficiency conditions, so that the power generation efficiency is in the optimal state, reducing fuel consumption; at the same time, the required power generation power can be corrected to ensure that the actual power generation power of the generator meets the initial required power generation power set by the user, thereby meeting the user's power generation needs.

[0119] Based on the same application concept, an embodiment of the present invention also provides an operation control device for a range extender. Figure 8 This is a structural block diagram of an operation control device for a range extender provided in an embodiment of the present application. Figure 8 As shown, the apparatus 800 includes:

[0120] A first acquisition module 801 is configured to acquire the required power generation of the generator in the range extender;

[0121] a second acquisition module 802 configured to select corresponding target operating condition data from a plurality of operating condition data based on the required generated power, and to acquire a target speed and a target torque from the target operating condition data; wherein the operating condition data is the operating condition data of the range extender when the power generation efficiency of the range extender meets a preset efficiency condition, and the operating condition data includes a speed and a corresponding torque;

[0122] A first control module 803 is configured to control the operation of the engine in the range extender according to the target torque;

[0123] A third acquisition module 804 is configured to acquire an actual speed of the generator when the engine in the range extender is controlled to operate according to the target torque and the generator is controlled to operate according to the target speed;

[0124] An adjustment module 805 is configured to adjust the target torque based on a speed deviation between the actual speed and the target speed;

[0125] The second control module 806 is configured to control the generator to operate according to the adjusted target torque so that the speed of the generator reaches the target speed.

[0126] In one embodiment, the adjustment module 805 is specifically configured to:

[0127] determining a torque deviation based on the speed deviation;

[0128] determining a generator torque based on the torque deviation and the target torque;

[0129] The target torque is adjusted to the generator torque, and the generator torque is used as the adjusted target torque.

[0130] In one embodiment, when determining the torque deviation based on the speed deviation, the adjustment module 805 is specifically configured to:

[0131] The speed deviation is used as the error value in the proportional integral differential algorithm;

[0132] The error value is brought into a proportional-integral-differential algorithm for calculation to obtain the torque deviation.

[0133] In one embodiment, the first acquisition module 801 is specifically configured to:

[0134] Obtaining the initial required power generation and actual power generation of the generator in the range extender;

[0135] The initial required power generation power is adjusted based on the actual power generation power to obtain the required power generation power.

[0136] In one embodiment, when obtaining the initial required power generation and actual power generation of the generator in the range extender, the first acquisition module 801 is specifically configured to:

[0137] Acquiring accelerator pedal opening information, and determining the initial required power generation power based on the opening information;

[0138] selecting corresponding initial operating condition data from the plurality of operating condition data according to the initial required generated power, and obtaining an initial speed and an initial torque in the initial operating condition data;

[0139] controlling the generator to operate according to the initial speed, and controlling the engine to operate according to the initial torque;

[0140] acquiring the current and voltage of the generator when the generator is controlled to operate according to the initial speed and the engine is controlled to operate according to the initial torque;

[0141] The actual generated power is determined based on the current and voltage.

[0142] In one embodiment, when the first acquisition module 801 adjusts the initial required power generation power based on the actual power generation power to obtain the required power generation power, it is specifically configured to:

[0143] determining a power difference between the initial required generated power and the actual generated power;

[0144] The sum of the initial required generated power and the power difference is calculated, and the obtained sum is used as the required generated power.

[0145] In one embodiment, the device further includes a judgment module, which is used to judge whether the vehicle enters the series power generation mode before the first acquisition module obtains the required power generation power of the generator in the range extender;

[0146] The first acquisition module 801 is specifically configured to acquire the required power generation power of the generator in the range extender when the vehicle enters the series power generation mode.

[0147] It can be understood that the device provided in the above embodiment is only illustrated by the division of the above functional modules. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0148] Reference Figure 9 , an embodiment of the present invention further provides an electronic device, which may include a processor 901 and a memory 901, wherein the processor 902 and the memory 901 may be communicatively connected to each other via a bus or other means.

[0149] The processor 902 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application, or may be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or a combination of the above chips.

[0150] Memory 901 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory may include a removable or non-removable (or fixed) medium. Where appropriate, the memory may be inside or outside the electronic device. In a particular embodiment, the memory may be a non-volatile solid-state memory.

[0151] In one embodiment, the memory 901 may be a read-only memory (ROM). In one embodiment, the ROM may be a mask-programmable ROM, a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), an electrically rewritable ROM (EAROM), or a flash memory, or a combination of two or more of these.

[0152] The processor 902 implements any one of the range extender operation control methods in the above embodiments by reading and executing computer program instructions stored in the memory.

[0153] In one example, the electronic device may further include a communication interface and a bus. The processor, memory, and communication interface are connected via the bus and communicate with each other. The communication interface is primarily used to enable communication between the various modules, devices, units, and / or devices in the embodiments of this application. Where appropriate, the bus may include one or more buses.

[0154] In addition, in conjunction with the range extender operation control method in the above embodiments, embodiments of the present invention may provide a computer-readable storage medium for implementation. The computer-readable storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any of the range extender operation control methods in the above embodiments is implemented.

[0155] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD). The storage medium can also include a combination of the above-mentioned types of memory.

[0156] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0157] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting an intention that the claimed invention requires more features than are expressly recited in each claim. Rather, as reflected in the claims below, inventive aspects lie in less than all the features of the individual embodiments disclosed above. Accordingly, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of the invention.

[0158] It should be noted that the above embodiments illustrate rather than limit the invention, and that a person skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between brackets should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The present invention may be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third etc. does not indicate any order. These words may be interpreted as names.

Claims

1. A method for controlling the operation of a range extender, characterized in that: The method comprises: Obtaining the required power generation power of the generator in the range extender; Based on the required generated power, corresponding target operating condition data is selected from a plurality of operating condition data, and a target speed and a target torque in the target operating condition data are obtained; wherein the operating condition data is the operating condition data of the range extender when the power generation efficiency of the range extender meets a preset efficiency condition, and the operating condition data includes a speed and a corresponding torque; controlling the operation of the engine in the range extender according to the target torque; obtaining an actual speed of the generator when the engine in the range extender is controlled to operate according to the target torque and the generator is controlled to operate according to the target speed; adjusting the target torque based on a speed deviation between the actual speed and the target speed; The generator is controlled to operate according to the adjusted target torque so that the rotational speed of the generator reaches the target rotational speed.

2. The method according to claim 1, characterized in that The adjusting the target torque based on the speed deviation between the actual speed and the target speed includes: determining a torque deviation based on the speed deviation; determining a generator torque based on the torque deviation and the target torque; The target torque is adjusted to the generator torque, and the generator torque is used as the adjusted target torque.

3. The method according to claim 2, characterized in that The determining of the torque deviation based on the speed deviation includes: The speed deviation is used as the error value in the proportional integral differential algorithm; The error value is brought into a proportional-integral-differential algorithm for calculation to obtain the torque deviation.

4. The method according to any one of claims 1 to 3, characterized in that The obtaining the required power generation power of the generator in the range extender includes: Obtaining the initial required power generation and actual power generation of the generator in the range extender; The initial required power generation power is adjusted based on the actual power generation power to obtain the required power generation power.

5. The method according to any one of claim 4, characterized in that The obtaining of the initial required power generation and the actual power generation of the generator in the range extender includes: Acquiring accelerator pedal opening information, and determining the initial required power generation power based on the opening information; selecting corresponding initial operating condition data from the plurality of operating condition data according to the initial required generated power, and obtaining an initial speed and an initial torque in the initial operating condition data; controlling the generator to operate according to the initial speed, and controlling the engine to operate according to the initial torque; acquiring the current and voltage of the generator when the generator is controlled to operate according to the initial speed and the engine is controlled to operate according to the initial torque; The actual generated power is determined based on the current and voltage.

6. The method according to claim 5, characterized in that The adjusting the initial required power generation power based on the actual power generation power to obtain the required power generation power includes: determining a power difference between the initial required generated power and the actual generated power; The sum of the initial required generated power and the power difference is calculated, and the obtained sum is used as the required generated power.

7. The method according to any one of claims 1 to 3, characterized in that Before obtaining the required power generation power of the generator in the range extender, the method further includes: Determine whether the vehicle has entered the series power generation mode; The obtaining the required power generation power of the generator in the range extender includes: When the vehicle enters the series power generation mode, the required power generation power of the generator in the range extender is obtained.

8. An operation control device for a range extender, characterized in that: The device comprises: A first acquisition module is used to obtain the required power generation power of the generator in the range extender; a second acquisition module, configured to select corresponding target operating condition data from a plurality of operating condition data based on the required generated power, and obtain a target speed and a target torque from the target operating condition data; wherein the operating condition data is the operating condition data of the range extender when the power generation efficiency of the range extender meets a preset efficiency condition, and the operating condition data includes a speed and a corresponding torque; a first control module, configured to control the operation of the engine in the range extender according to the target torque; a third acquisition module, configured to acquire an actual speed of the generator when the engine in the range extender is controlled to operate according to the target torque and the generator is controlled to operate according to the target speed; an adjusting module, configured to adjust the target torque based on a speed deviation between the actual speed and the target speed; The second control module is configured to control the operation of the generator according to the adjusted target torque so that the rotational speed of the generator reaches the target rotational speed.

9. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the method according to any one of claims 1 to 7 by executing the computer instructions.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute the method according to any one of claims 1 to 7.

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