Vehicle power generation control method, controller, vehicle and storage medium

Abstract

The invention provides a vehicle power generation control method, a controller, a vehicle and a storage medium. The vehicle power generation control method comprises the steps that the characteristic power # imgabs0 # of a vehicle comprising a range extender under all typical working conditions is determined, and the typical working conditions of the vehicle comprise the light load working condition, the light medium load working condition, the medium load working condition, the medium heavy load working condition and the heavy load working condition; based on the characteristic power # imgabs1 # of the vehicle under each typical working condition, the optimal power generation power of the range extender under each characteristic power # imgabs2 # is determined, and the optimal power generation power is the power generation power of the range extender with the highest power generation capacity under unit oil consumption; the actual required power # imgabs3 # of the vehicle is calculated; according to the actual required power # imgabs4 # of the vehicle, whether the range extender works or not is determined, and when the range extender works, the power of the range extender is made to be equal to the optimal power generation power under the characteristic power # imgabs6 # corresponding to the actual required power # imgabs5 # of the vehicle. In this way, vehicle energy consumption can be reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle power generation control method, a controller, a vehicle and a storage medium. Background Art

[0002] Since the range extender can provide additional electric energy to extend the driving mileage of the vehicle including the battery, the range extender has been widely used in various vehicles such as household vehicles, commercial vehicles or engineering vehicles.

[0003] However, in the related art, when the range extender is working, the energy consumption is usually high, resulting in high energy consumption of the entire vehicle, which is not conducive to energy conservation and emission reduction. Summary of the invention

[0004] A technical problem to be solved by the present application is to reduce the energy consumption of a vehicle including a range extender.

[0005] In order to solve the above technical problems, the present application provides a vehicle power generation control method, which includes:

[0006] Determine the characteristic power of a vehicle including a range extender under various typical operating conditions ,The typical operating conditions of vehicles include light load, light-medium load, medium load, medium-heavy load and heavy load conditions;

[0007] Based on the characteristic power of the vehicle under various typical working conditions , determine the range extender at each characteristic power The optimal power generation under the condition of , the optimal power generation is the power generation with the highest power generation under the unit fuel consumption of the range extender;

[0008] Calculate the actual power required by the vehicle ;

[0009] According to the actual power required by the vehicle , determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under .

[0010] In some embodiments, the characteristic power of a vehicle including a range extender under various typical operating conditions is determined. include:

[0011] Determine the power of the vehicle under various typical operating conditions;

[0012] Based on the obtained power of the vehicle under each typical working condition, determine the vehicle under each typical working condition within a preset time The average power within

[0013] According to the vehicle under various typical working conditions at the preset time The average power within the vehicle is used to determine the characteristic power of the vehicle under various typical working conditions. .

[0014] In some embodiments, based on the acquired power of the vehicle under each typical operating condition, it is determined that the vehicle is capable of operating at a preset time under each typical operating condition. When the average power is within =( + +......+ ) / t, determine the vehicle under each typical working condition within the preset time The average power in is the average power of the vehicle under a typical operating condition, , … It is the power of each functional module of the vehicle under corresponding typical working conditions, and the functional modules of the vehicle include at least one of a traveling module, an operating module and an accessory module.

[0015] In some embodiments, according to the vehicle under various typical working conditions at a preset time The average power within the vehicle is used to determine the characteristic power of the vehicle under various typical working conditions. include:

[0016] The vehicle is driven under various typical conditions for a preset time. The average power within the range is determined as the characteristic power of the vehicle under each typical working condition. .

[0017] In some embodiments, it is determined that the range extender has a characteristic power The optimal power generation under the condition includes:

[0018] Determine the optimal power generation power MAP of the range extender;

[0019] The characteristic power of the vehicle Corresponding to the optimal power generation power MAP of the range extender, the range extender is obtained at each characteristic power The optimal power generation under .

[0020] In some embodiments, determining the optimal power generation power MAP of the range extender includes:

[0021] Obtain the universal characteristic MAP of the engine of the range extender and the efficiency MAP of the generator;

[0022] The universal characteristic MAP of the engine and the efficiency MAP of the generator are fitted, and based on the fitting result, the optimal power generation MAP of the range extender is determined.

[0023] In some embodiments, fitting the universal characteristic MAP of the engine and the efficiency MAP of the generator, and determining the optimal power generation MAP of the range extender based on the fitting result includes:

[0024] Fitting the universal characteristic MAP of the engine and the efficiency MAP of the generator to obtain the first power generation MAP of the range extender;

[0025] The first power generation power MAP of the range extender is corrected to obtain the optimal power generation power MAP of the range extender.

[0026] In some embodiments, correcting the first power generation power MAP of the range extender includes:

[0027] Conduct bench tests on the range extender;

[0028] According to the bench test results, the first power generation power MAP of the range extender is corrected.

[0029] In some embodiments, the actual power required by the vehicle is calculated include:

[0030] Get the actual power of the vehicle;

[0031] Based on the actual power of the vehicle, determine the vehicle's The actual average power within ;

[0032] Based on the vehicle at the preset time The actual average power within , determine the actual power required by the vehicle .

[0033] In some embodiments, based on the actual power of the vehicle, it is determined that the vehicle is within a preset time. The actual average power within When, according to the formula =( + +......+ ) / t, to determine the vehicle at the preset time The actual average power within ,in, , … It is the actual power of each functional module of the vehicle, and the functional module of the vehicle includes at least one of a traveling module, an operation module and an accessory module.

[0034] In some embodiments, based on the vehicle's The actual average power within , determine the actual power required by the vehicle include:

[0035] The vehicle will be at the preset time The actual average power within , determined as the actual power required by the vehicle .

[0036] In some embodiments, based on the actual power required by the vehicle , determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under the condition includes:

[0037] According to the actual power required by the vehicle And the lower limit of the vehicle battery SOC and upper limit , to determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power Optimal power generation under ;

[0038] in, , .

[0039] In some embodiments, based on the actual power required by the vehicle And the lower limit of the vehicle battery SOC and upper limit , to determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under the condition includes:

[0040] According to the actual power required by the vehicle The characteristic power of the vehicle under various typical working conditions The relationship between the size of the load and the load determines whether the vehicle is in a light load or light-medium load condition, or in a medium load, medium-heavy load or heavy load condition; and

[0041] At least one of the following:

[0042] When the vehicle is in light or medium load condition, according to the actual power required by the vehicle and The size relationship between them determines whether the range extender is working, and when the range extender is working, the power of the range extender is equal to the actual power required by the vehicle. The corresponding characteristic power The optimal power generation under , is the actual battery capacity, is the total power of the battery when it is fully charged, is the preset time;

[0043] When the vehicle is in medium load, medium-heavy load or heavy load condition, the range extender is operated and the power required by the vehicle is adjusted according to the actual power required by the vehicle. The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions The relationship between the size and the lower limit of the battery SOC and upper limit , determine the actual power required by the vehicle The corresponding characteristic power The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions Which one of the following should be used to make the range extender power equal to the actual power required by the vehicle? The corresponding characteristic power The optimal power generation under .

[0044] In some embodiments, based on the actual power required by the vehicle and The size relationship between them determines whether the range extender is working, and when the range extender is working, the power of the range extender is equal to the actual power required by the vehicle. The corresponding characteristic power The optimal power generation under the condition includes:

[0045] exist When the range extender is not working, the battery is working, and the battery SOC value drops to the lower limit When the range extender works at the power actually required by the vehicle The corresponding characteristic power charging the battery at the optimal power generation under the conditions of

[0046] exist > When the range extender works at the power actually required by the vehicle The corresponding characteristic power At the optimal power generation under the condition of When the range extender stops working, the battery works instead.

[0047] In some embodiments, based on the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions The relationship between the size and the lower limit of the battery SOC and upper limit , determine the actual power required by the vehicle The corresponding characteristic power The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions Which one of the following makes the range extender power equal to the actual power required by the vehicle? The corresponding characteristic power The optimal power generation under the condition includes:

[0048] Determine the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions are equal; and

[0049] At least one of the following:

[0050] If the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions If the vehicle is equal, the characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions is The actual power required The characteristic power is equal , as the actual power required by the vehicle The corresponding characteristic power and make the range extender work at the actual power required by the vehicle The corresponding characteristic power Under the optimal power generation under the condition of , the vehicle energy consumption is supplied with power;

[0051] If the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions If they are not equal, then the battery SOC value and the lower limit value are and upper limit The relationship between the size of the vehicle determines the actual power required by the vehicle. The corresponding characteristic power The actual power required Two adjacent characteristic powers Which one of the following should be used to make the range extender power equal to the actual required power? The corresponding characteristic power The optimal power generation under .

[0052] In some embodiments, the battery SOC value and the lower limit value are used to determine the battery SOC value. and upper limit The relationship between the size of the vehicle determines the actual power required by the vehicle. The corresponding characteristic power The actual power required Two adjacent characteristic powers Which one of the following should be used to make the range extender power equal to the actual required power? The corresponding characteristic power The optimal power generation under the condition includes at least one of the following:

[0053] When the battery SOC value is greater than the lower limit , and is less than or equal to the upper limit The actual power required Two adjacent characteristic powers Smaller than the actual power required The characteristic power , as the actual power required by the vehicle The corresponding characteristic power and make the range extender power equal to the actual required power The corresponding characteristic power The optimal power generation under the condition of the range extender and the battery together supply power to the vehicle until the SOC value of the battery drops to the lower limit and / or,

[0054] When the battery SOC value is less than the upper limit , and is greater than or equal to the lower limit The actual power required Two adjacent characteristic powers Greater than the actual power required The characteristic power , as the actual power required by the vehicle The corresponding characteristic power and make the range extender power equal to the actual required power The corresponding characteristic power The range extender charges the battery and supplies power to the vehicle until the battery SOC value reaches the upper limit. .

[0055] In some embodiments, , and / or, .

[0056] In some embodiments, , and / or, .

[0057] In addition, the present application also provides a controller, which includes a memory and a processor coupled to the memory, and the processor is configured to execute the vehicle power generation control method of any embodiment based on instructions stored in the memory.

[0058] In addition, the present application also provides a vehicle, which includes a range extender and the controller of any embodiment.

[0059] In some embodiments, the vehicle is a construction vehicle.

[0060] In addition, the present application also provides a storage medium, which stores computer instructions, and the computer instructions are executed by a processor to implement the vehicle power generation control method of any embodiment.

[0061] Due to the use of the vehicle power generation control method of the present application, the range extender either does not work or works at the optimal power generation power. The range extender can concentrate on generating electricity in the low fuel consumption area, thereby effectively reducing the energy consumption of the vehicle.

[0062] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0064] Figure 1 Schematic diagram of the process of the vehicle power generation control method in the embodiment of the present application.

[0065] Figure 2 It is a detailed flow chart of the vehicle power generation control method in the embodiment of the present application.

[0066] Figure 3 It is the optimal power generation power MAP of the range extender in the embodiment of the present application.

[0067] Figure 4 Schematic diagram of information interaction between controllers in an embodiment of the present application. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of this application.

[0069] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0070] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0071] In the description of the present application, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present application.

[0072] In the present application, unless otherwise specified, “plurality” means at least two, that is, including cases of two and at least three.

[0073] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0074] In the related art, a constant power or power following method is usually adopted to control the range extender to generate electricity. In this case, the range extender cannot concentrate on generating electricity in the low fuel consumption area, resulting in higher energy consumption of the whole vehicle.

[0075] In view of the above situation, in order to reduce the energy consumption of a vehicle including a range extender, the present application provides a vehicle power generation control method, a controller, a vehicle and a storage medium.

[0076] Figure 1-Figure 4 The vehicle power generation control method and controller of the present application are exemplarily shown.

[0077] See also Figure 1-Figure 4 In the present application, the vehicle power generation control method includes:

[0078] Determine the characteristic power of a vehicle including a range extender under various typical operating conditions ,The typical operating conditions of vehicles include light load, light-medium load, medium load, medium-heavy load and heavy load conditions;

[0079] Based on the characteristic power of the vehicle under various typical working conditions , determine the range extender at each characteristic power The optimal power generation under the condition of , the optimal power generation is the power generation with the highest power generation under the unit fuel consumption of the range extender;

[0080] Calculate the actual power required by the vehicle ;

[0081] According to the actual power required by the vehicle , determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under .

[0082] The above scheme determines each characteristic power based on each typical working condition of the vehicle in advance. , and lock each characteristic power The optimal power generation of the corresponding range extender is then used to obtain the actual power required by the vehicle during actual operation of the vehicle, and the working state and power generation of the range extender are determined based on the actual power required by the vehicle, so that the range extender either does not work or works at the actual power required by the vehicle. The corresponding characteristic power Under the optimal power generation under the optimal power generation, because under the optimal power generation, the range extender has the highest power generation per unit fuel consumption, therefore, the range extender is either not working, or working at the power actually required by the vehicle. The corresponding characteristic power Under the optimal power generation power under the optimal condition, the operating time of the range extender under the optimal power generation power can be effectively extended, so that the range extender can concentrate on generating electricity in the low fuel consumption area, effectively reducing the energy consumption of the whole vehicle, saving energy and reducing emissions.

[0083] Moreover, due to the above scheme, each characteristic power is determined in advance based on each typical working condition of the vehicle. , and lock each characteristic power The optimal power generation power of the corresponding range extender, and then the characteristic power The locked optimal power generation power of the range extender is applied to the power generation control process of the range extender. Therefore, it can effectively adapt to the complex operating conditions of vehicles, especially the complex operating conditions of engineering vehicles, large changes in operating loads, and different conditions of different vehicles. It effectively enhances the robustness of the vehicle power generation control method (which is the transliteration of robustness, referring to the ability of the system to maintain its functional stable operation when facing changes in internal structure or external environment), so that the corresponding vehicle power generation control method can be applicable to various vehicle types.

[0084] It can be seen that the vehicle power generation control method provided by the above scheme can effectively extend the operating time of the range extender at the optimal power generation power, effectively reduce the vehicle energy consumption, and can be applied to various vehicle types with strong robustness.

[0085] Specifically, in some embodiments, the characteristic power of a vehicle including a range extender under various typical operating conditions is determined. include:

[0086] Determine the power of the vehicle under various typical operating conditions;

[0087] Based on the obtained power of the vehicle under each typical working condition, determine the vehicle under each typical working condition within a preset time The average power within

[0088] According to the vehicle under various typical working conditions at the preset time The average power within the vehicle is used to determine the characteristic power of the vehicle under various typical working conditions. .

[0089] In the above steps, each characteristic power is determined in advance. In the process of Instead, the vehicle power under each typical working condition is first obtained based on the vehicle power under each typical working condition at a preset time. The average power within, and then based on the corresponding average power to get each characteristic power In this way, since the vehicle is in each typical working condition within the preset time The average power within is a numerical point, which is more stable than the real-time changing power of the vehicle under various typical operating conditions. Therefore, it can simplify the control process and prevent the frequent switching of the working state and working frequency of the range extender due to the frequent changes in the power of the vehicle under various typical operating conditions, effectively improving the stability and accuracy of the power generation control process and achieving a more accurate and stable power generation control process.

[0090] The preset time It can be determined according to the cycle period of each typical working condition, for example, it can be equal to the cycle period of each typical working condition, or it can be different from the cycle period of each typical working condition, but it can be corrected on the basis of the cycle period of each typical working condition, for example, it can be the average value of multiple cycle periods. Related to the cycle period of each typical working condition, which is conducive to obtaining more accurate characteristic power , thereby achieving a more accurate power generation control process.

[0091] In some embodiments, based on the acquired power of the vehicle under each typical operating condition, it is determined that the vehicle is When the average power is within =( + +......+ ) / t, determine the vehicle under each typical working condition within the preset time The average power in is the average power of the vehicle under a typical operating condition, , … It is the power of each functional module of the vehicle under corresponding typical working conditions, and the functional modules of the vehicle include at least one of a traveling module, an operating module and an accessory module.

[0092] When a vehicle is working, there may be multiple functional modules consuming power. For example, for some engineering vehicles, not only the traveling motor of the traveling module (there may be one, two or four traveling motors) consumes power, but also the operating motor of the operating module consumes power. At the same time, some engineering vehicles, in addition to the power consumption of the traveling module and the operating module, may also have some accessory modules (such as the hydraulic pump of the hydraulic module or the fan of the fan module, etc.) that consume power. Therefore, summing the power of all functional modules of the vehicle can accurately reflect the power of the whole vehicle. Moreover, the power consumption of each functional module is usually not constant, but changes in real time. Therefore, when calculating the power of each functional module, time integration is performed to more accurately obtain the power of each functional module. Therefore, in the above scheme, the real-time changing power of each functional module of the vehicle under each typical working condition is integrated and summed within the preset time t, and divided by the preset time t to obtain the average power under each typical working condition. This calculation method of dividing the accumulated integral by the preset time t can calculate a more accurate average power , effectively improve the characteristic power The accuracy of the characteristic power The accuracy of the optimal power generation will affect the accuracy of the actual operating power of the range extender, and thus affect the fuel saving effect. Therefore, the calculation method of cumulative integral divided by the preset time t is adopted to improve the characteristic power. The accuracy of the power generation control process is conducive to improving the accuracy of the power generation control process and achieving a more precise and fuel-saving power generation control process.

[0093] In some embodiments, according to the vehicle under various typical working conditions at a preset time The average power within the vehicle is used to determine the characteristic power of the vehicle under various typical working conditions. include:

[0094] The vehicle is driven under various typical conditions for a preset time. The average power within the range is determined as the characteristic power of the vehicle under each typical working condition. .

[0095] The above scheme directly sets the vehicle to run at a preset time under various typical working conditions. The average power within , determined as the characteristic power of the vehicle under various typical operating conditions , simple and convenient, which is conducive to achieving a simpler power generation control process for energy saving and emission reduction.

[0096] In addition, in some embodiments, it is determined that the range extender has a certain power The optimal power generation under the condition includes:

[0097] Determine the optimal power generation power MAP of the range extender;

[0098] The characteristic power of the vehicle Corresponding to the optimal power generation power MAP of the range extender, the range extender is obtained at each characteristic power The optimal power generation under .

[0099] By constructing the optimal power generation MAP of the range extender and comparing the corresponding optimal power generation MAP with the characteristic power of the vehicle Corresponding, each characteristic power can be locked The corresponding optimal power generation can easily determine the range extender at each characteristic power. The optimal power generation under the actual working conditions can be accurately controlled in the future so that the range extender can generate electricity at the optimal power generation corresponding to the actual working conditions, saving fuel, reducing emissions and reducing energy consumption.

[0100] Specifically, in some embodiments, determining the optimal power generation power MAP of the range extender includes:

[0101] Obtain the universal characteristic MAP of the engine of the range extender and the efficiency MAP of the generator;

[0102] The universal characteristic MAP of the engine and the efficiency MAP of the generator are fitted, and based on the fitting result, the optimal power generation MAP of the range extender is determined.

[0103] The universal characteristic MAP of the engine is usually based on the speed n as the horizontal axis, and the torque and mean effective pressure as the vertical axis. Many equal fuel consumption rate curves and equal power curves are drawn on the graph to form the engine universal characteristic MAP (or engine universal characteristic curve graph), which can reflect the fuel consumption of the engine. The efficiency MAP of the generator usually reflects the efficiency distribution of the generator at different speeds and torques. Since the range extender includes an engine and a generator, the universal characteristic MAP of the engine of the range extender and the efficiency MAP of the generator are comprehensively considered, and the two are fitted to determine at which power the range extender has low fuel consumption but high power generation efficiency, thereby determining the optimal power generation power MAP of the range extender.

[0104] Specifically, in some embodiments, fitting the universal characteristic MAP of the engine and the efficiency MAP of the generator, and determining the optimal power generation MAP of the range extender based on the fitting result includes:

[0105] Fitting the universal characteristic MAP of the engine and the efficiency MAP of the generator to obtain the first power generation MAP of the range extender;

[0106] The first power generation power MAP of the range extender is corrected to obtain the optimal power generation power MAP of the range extender.

[0107] The above scheme does not directly determine the first power generation MAP obtained by fitting the universal characteristic MAP of the engine and the efficiency MAP of the generator as the optimal power generation MAP of the range extender, but also corrects the first power generation MAP obtained by fitting the universal characteristic MAP of the engine and the efficiency MAP of the generator, and then obtains the optimal power generation MAP of the range extender. In this way, a more accurate optimal power generation MAP can be obtained, so that in the actual power generation control process, the range extender can operate at a more accurate optimal power generation and more effectively reduce energy consumption.

[0108] More specifically, in some embodiments, correcting the first power generation power MAP of the range extender includes:

[0109] Conduct bench tests on the range extender;

[0110] According to the bench test results, the first power generation power MAP of the range extender is corrected.

[0111] In the above steps, the first power generation power MAP is corrected by bench test instead of theoretical correction. Since the bench test is closer to the actual situation, the first power generation power MAP is corrected by bench test. The correction result is more accurate, which is conducive to obtaining a more accurate optimal power generation power MAP. It is convenient to make the range extender work at a more accurate optimal power generation power in the actual power generation control process, so as to more effectively reduce energy consumption.

[0112] As the actual required power of the vehicle is calculated in the above embodiments In some embodiments, the actual power required by the vehicle is calculated include:

[0113] Get the actual power of the vehicle;

[0114] Based on the actual power of the vehicle, determine the vehicle's The actual average power within ;

[0115] Based on the vehicle at the preset time The actual average power within , determine the actual power required by the vehicle .

[0116] The above steps are used to determine the actual power required by the vehicle. In the process, the actual power of the vehicle is not directly determined as the characteristic power Instead, we first obtain the vehicle's actual power at the preset time based on the actual power of the vehicle. The actual average power within , and then based on the corresponding average power To get the actual power required by the vehicle , so that, since the vehicle is at the preset time The actual average power within It is a numerical point that changes with the actual power required by the vehicle in real time. Compared with the conventional power transmission system, it is more stable, therefore, the control process can be simplified, and the frequent switching of the working state and working frequency of the range extender due to the frequent changes in the actual power of the vehicle can be prevented, which effectively improves the stability and accuracy of the power generation control process and realizes a more accurate and stable power generation control process.

[0117] Specifically, in some embodiments, based on the actual power of the vehicle, it is determined that the vehicle is The actual average power within When, according to the formula =( + +......+ ) / t, to determine the vehicle at the preset time The actual average power within ,in, , … It is the actual power of each functional module of the vehicle, and the functional module of the vehicle includes at least one of a traveling module, an operation module and an accessory module.

[0118] As mentioned above, when a vehicle is working, there may be multiple functional modules consuming electricity. For example, for some engineering vehicles, not only the travel motor of the travel module consumes electricity, but also the working motor of the operating module consumes electricity. At the same time, some engineering vehicles, in addition to the power consumption of the travel module and the operating module, may also have some accessory modules (such as the hydraulic pump of the hydraulic module or the fan of the fan module, etc.) that consume electricity. Therefore, summing the actual power of all functional modules of the vehicle can accurately reflect the actual power of the entire vehicle. Moreover, the power consumption of each functional module is usually not constant, but changes in real time. Therefore, when calculating the actual power of each functional module, time integration is performed to more accurately obtain the actual power of each functional module. Therefore, in the above scheme, the real-time changing actual power of each functional module of the vehicle is integrated and summed within the preset time t, and divided by the preset time t to obtain the actual average power of the vehicle. This calculation method of dividing the accumulated integral by the preset time t can calculate a more accurate actual average power , effectively increasing the actual required power The accuracy of the actual power required The accuracy of the actual operating power of the range extender affects the accuracy of the actual operating power of the range extender and the fuel saving effect. Therefore, the calculation method of cumulative integral divided by the preset time t is adopted to improve the actual required power. The accuracy of the power generation control process is conducive to improving the accuracy of the power generation control process and achieving a more precise and fuel-saving power generation control process.

[0119] In some embodiments, based on the vehicle's The actual average power within , determine the actual power required by the vehicle include:

[0120] The vehicle will be at the preset time The actual average power within , determined as the actual power required by the vehicle .

[0121] The above solution directly sends the vehicle to the preset time. The actual average power within , determined as the actual required power , simple and convenient, which is conducive to achieving a simpler power generation control process for energy conservation and emission reduction.

[0122] As in the above embodiments, "according to the actual power required by the vehicle , determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power In some embodiments, the optimal power generation under the vehicle is based on the actual power required by the vehicle. , determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under the condition includes:

[0123] According to the actual power required by the vehicle And the lower limit of the vehicle battery SOC and upper limit , to determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power Optimal power generation under ;

[0124] in, , .

[0125] In the above scheme, when determining the working state and power generation power of the range extender, not only the actual power required by the vehicle is considered , and also consider the lower limit of the battery SOC (State of Charge, which is used to quantify the charging progress of the battery at a certain moment, and its value ranges from 0% to 100%) that can characterize the battery state and upper limit In this way, the battery status can be further taken into account in the process of controlling the range extender to work with low consumption and high efficiency, so that the battery can meet the use needs without feeding power and the cost is not too high, thus realizing a safer and more reliable power generation control process.

[0126] Specifically, in some embodiments, according to the actual power required by the vehicle And the lower limit of the vehicle battery SOC and upper limit , to determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under the condition includes:

[0127] According to the actual power required by the vehicle The characteristic power of the vehicle under various typical working conditions The relationship between the size of the load and the load determines whether the vehicle is in a light load or light-medium load condition, or in a medium load, medium-heavy load or heavy load condition; and

[0128] At least one of the following:

[0129] When the vehicle is in light or medium load condition, according to the actual power required by the vehicle and The size relationship between them determines whether the range extender is working, and when the range extender is working, the power of the range extender is equal to the actual power required by the vehicle. The corresponding characteristic power The optimal power generation under , is the actual battery capacity, is the total power of the battery when it is fully charged, is the preset time;

[0130] When the vehicle is in medium load, medium-heavy load or heavy load condition, the range extender is operated and the power required by the vehicle is adjusted according to the actual power required by the vehicle. The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions The relationship between the size and the lower limit of the battery SOC and upper limit , determine the actual power required by the vehicle The corresponding characteristic power The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions Which one of the following should be used to make the range extender power equal to the actual power required by the vehicle? The corresponding characteristic power The optimal power generation under .

[0131] Among the typical operating conditions of a vehicle, the power required for light load and light-medium load conditions is generally small, and there are situations where the power demand can be met simply by relying on batteries. However, the power required for medium load, medium-heavy load or heavy load conditions is generally large, and it is usually difficult to fully meet the power demand of the entire vehicle by relying solely on batteries. In view of this, the above scheme treats light load and light-medium load as one situation, and medium load, medium-heavy load or heavy load as another situation, and adopts different control strategies for the two situations, which can achieve a simpler and more effective power generation control process.

[0132] Among them, for the cases where the actual required power belongs to light load and light-medium load, according to the actual required power of the vehicle and The relationship between the size of the range extender is used to determine the working state and operating power of the range extender, so that the range extender has both non-working and working conditions, and when working, the power of the range extender is equal to the actual power required by the vehicle. The corresponding characteristic power The optimal power generation power under the condition of low load can be achieved. In this way, the power requirements of light load and light-medium load can be met based on a simpler control process, and energy consumption can be reduced while taking into account the smooth and reliable operation of the battery.

[0133] When the actual power required is medium load, medium-heavy load or heavy load, the range extender is always working and the actual power required by the vehicle is adjusted. The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions The relationship between the size and the lower limit of the battery SOC and upper limit , by determining the operating power of the range extender, a more refined power generation control process under medium load, medium-heavy load or heavy load conditions can be achieved. While effectively meeting the power requirements of medium load, medium-heavy load or heavy load conditions, energy consumption can be effectively reduced, while taking into account the smooth and reliable operation of the battery.

[0134] Specifically, in some embodiments, according to the actual power required by the vehicle and The size relationship between them determines whether the range extender is working, and when the range extender is working, the power of the range extender is equal to the actual power required by the vehicle. The corresponding characteristic power The optimal power generation under the condition includes at least one of the following:

[0135] exist When the range extender is not working, the battery is working, and the battery SOC value drops to the lower limit When the range extender works at the power actually required by the vehicle The corresponding characteristic power The battery is charged at the optimal power generation under the condition of

[0136] exist > When the range extender works at the power actually required by the vehicle The corresponding characteristic power At the optimal power generation under the condition of When the range extender stops working, the battery works instead.

[0137] In the above scheme, This means that under light or medium load conditions, the battery's own power can meet the vehicle's actual power requirements. In this case, the battery can be operated without the range extender, which can effectively meet the vehicle's actual power requirements with less energy consumption until the battery's power is consumed to the SOC lower limit. , which means that the battery needs to be charged, so the range extender is started to charge the battery to prevent the battery from being fed. In the corresponding process, the range extender works at the optimal power generation power and consumes less energy. Therefore, the overall power demand of the vehicle in the corresponding situation can be effectively met based on less energy consumption.

[0138] and > , indicating that under the corresponding light load or light-medium load conditions, the battery's own power is insufficient to meet the actual power demand of the vehicle. In this case, the range extender is operated to charge the battery, which can effectively prevent the battery from feeding until the battery is charged to the SOC upper limit value. , then shut down the range extender and start working with the battery, then the battery can continue to be used to meet the actual power demand of the vehicle. In this way, not only can the battery be able to power the vehicle when it is fully charged, effectively meeting the actual power demand of the vehicle, but also because the range extender is working at the optimal power generation power during the battery charging project, therefore, it can effectively reduce fuel consumption.

[0139] In addition, in some embodiments, according to the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions The relationship between the size and the lower limit of the battery SOC and upper limit , determine the actual power required by the vehicle The corresponding characteristic power The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions Which one of the following makes the range extender power equal to the actual power required by the vehicle? The corresponding characteristic power The optimal power generation under the condition includes:

[0140] Determine the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions are equal; and

[0141] At least one of the following:

[0142] If the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions If the vehicle is equal to the load, then the characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions is The actual power required The characteristic power is equal , as the actual power required by the vehicle The corresponding characteristic power and make the range extender work at the actual power required by the vehicle The corresponding characteristic power Under the optimal power generation under the condition of , the vehicle energy consumption is supplied with power;

[0143] If the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions If they are not equal, then the battery SOC value and the lower limit value are and upper limit The relationship between the size of the vehicle determines the actual power required by the vehicle. The corresponding characteristic power The actual power required Two adjacent characteristic powers Which one of the following should be used to make the range extender power equal to the actual required power? The corresponding characteristic power The optimal power generation under .

[0144] The above scheme is based on the actual power required by the vehicle. The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions Different control strategies can be adopted for the two situations of equality and inequality to achieve a more accurate and energy-saving power generation control process.

[0145] Among them, the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions If they are exactly equal, the actual power required by the vehicle will be directly The characteristic power is equal As the actual required power The corresponding characteristic power , and accordingly lock the optimal power generation of the range extender, so that the range extender operates at the corresponding optimal power generation. For example, if the actual power required by the vehicle is is 75, and the characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions 60, 75 and 95 respectively, which means that the actual power required The characteristic power under medium and heavy load conditions is 75 In this case, the characteristic power under medium and heavy load conditions is The actual power required The corresponding characteristic power , and according to the characteristic power under medium and heavy load conditions The optimal power generation power is determined, and the corresponding optimal power generation power is determined as the power generation power of the range extender, so that the range extender generates electricity at the corresponding optimal power generation power. In this way, the electricity generated by the range extender can meet the actual power requirements of the entire vehicle, and the battery power does not need to be increased or decreased. Moreover, since the operating power of the range extender is the optimal power generation power, the fuel consumption is less, so that based on the less fuel consumption, the operation requirements of the entire vehicle under the corresponding circumstances can be effectively met, and further energy conservation and emission reduction can be achieved.

[0146] The actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions If the two are not equal (which is more common than the equal case), it means that the characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions None of the above is equal to the actual required power , the actual power required Characteristic power under medium load, medium-heavy load or heavy load conditions The two characteristic powers in Between these two characteristic powers adjacent to one of the characteristic powers Smaller than the other characteristic power Large, for example, the characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions are 60, 75 and 95 respectively, while the actual power required by the vehicle is 85, which means that the actual power required by the vehicle Characteristic power under medium load, medium-heavy load or heavy load conditions They are not equal, but are characteristic powers under medium or heavy load conditions. and compared with the characteristic power under medium and heavy load conditions. Large, and the characteristic power under heavy load conditions In this case, how to determine the actual required characteristic power The corresponding characteristic power , becomes a difficult problem, and the above solution, based on the battery SOC value and the lower limit value and upper limit The relationship between the size of the Two adjacent characteristic powers Which one of the following is the actual required characteristic power? The corresponding characteristic power , the corresponding problems can be effectively solved, allowing the range extender to still operate at the optimal power generation power while taking into account the status of the battery. Therefore, a more accurate, fuel-efficient, safe and reliable power generation control process can be achieved.

[0147] Specifically, in some embodiments, according to the SOC value of the battery and the lower limit value and upper limit The relationship between the size of the vehicle determines the actual power required by the vehicle. The corresponding characteristic power The actual power required Two adjacent characteristic powers Which one of the following should be used to make the range extender power equal to the actual required power? The corresponding characteristic power The optimal power generation under the condition includes at least one of the following:

[0148] When the battery SOC value is greater than the lower limit , and is less than or equal to the upper limit The actual power required Two adjacent characteristic powers Smaller than the actual power required The characteristic power , as the actual power required by the vehicle The corresponding characteristic power and make the range extender power equal to the actual required power The corresponding characteristic power The optimal power generation under the condition of the range extender and the battery together supply power to the vehicle until the SOC value of the battery drops to the lower limit ;

[0149] When the battery SOC value is less than the upper limit , and is greater than or equal to the lower limit The actual power required Two adjacent characteristic powers Greater than the actual power required The characteristic power , as the actual power required by the vehicle The corresponding characteristic power and make the range extender power equal to the actual required power The corresponding characteristic power The range extender charges the battery and supplies power to the vehicle until the battery SOC value reaches the upper limit. .

[0150] The above scheme depends on whether the battery SOC value reaches the upper limit and lower limit Conditions, to select the actual required power Two adjacent characteristic powers Which of the following is the actual power required by the vehicle? The corresponding characteristic power , which can not only make the range extender work at the optimal power generation power, but also take into account the status of the battery, to achieve a more accurate, fuel-efficient, safe and reliable power generation control process.

[0151] Among them, the SOC value of the battery is greater than the lower limit , and is less than or equal to the upper limit , indicating that the battery is not suitable for charging, but can be discharged. In this case, the selection and actual required power The actual power required The smaller characteristic power , as the actual power required by the vehicle The corresponding characteristic power , for example, the characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions are 60, 75 and 95 respectively, while the actual power required by the vehicle =85, the battery SOC = 80%, then select the characteristic power under medium and heavy load conditions , i.e. 75 as the actual required power The corresponding characteristic power , and accordingly lock the optimal power generation power of the range extender, so that the range extender operates at the corresponding optimal power generation power. In this way, part of the power required by the whole vehicle can be supplied by the range extender, and the other part can be supplied by the battery. In other words, the range extender and the battery together meet the power demand of the whole vehicle and supply the energy consumption of the whole vehicle. In this way, it can effectively meet the operation needs of the whole vehicle in the corresponding situation, and make full use of the battery's own electrical energy. Moreover, since the operating power of the range extender is the optimal power generation power, the fuel consumption is less, so that based on less energy consumption, the operation needs of the whole vehicle in the corresponding situation can be effectively met, and further energy conservation and emission reduction can be achieved.

[0152] The battery SOC value is less than the upper limit , and is greater than or equal to the lower limit , indicating that the battery is not suitable for discharge, but can be charged. In this case, the selection and actual required power The actual power required The larger characteristic power , as the actual power required by the vehicle The corresponding characteristic power , for example, the characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions are 60, 75 and 95 respectively, while the actual power required by the vehicle =85, the battery SOC = 40%, then select the characteristic power under heavy load conditions , that is, 95 as the actual required power The corresponding characteristic power , and accordingly lock the optimal power generation power of the range extender, so that the range extender operates at the corresponding optimal power generation power. In this way, the electricity generated by the range extender can not only meet the operation needs of the whole vehicle, but also charge the battery. In this way, it can effectively meet the operation needs of the whole vehicle in the corresponding situation, and increase the battery power. Moreover, since the operating power of the range extender is the optimal power generation power, the fuel consumption is less, so that based on less energy consumption, the operation needs of the whole vehicle in the corresponding situation can be effectively met, and further energy conservation and emission reduction can be achieved.

[0153] In the above two cases, since in the first case, the battery and the range extender together power the vehicle, the battery SOC may drop to the lower limit value. , it becomes the condition that meets the second case, and in the second case, the range extender charges the battery, and the battery SOC may increase to the upper limit value , becomes the condition that meets the first situation. Therefore, the above two control strategies may be executed alternately and may last for multiple cycles to realize the dynamically adjusted power generation control process and more accurately meet the changing working conditions of the whole machine. In addition, since there are overlapping parts in the conditions of the above two situations, when the SOC of the battery meets the conditions of the above two situations at the same time, it can be controlled according to any one of the two control strategies first, and when the other condition is met, it can be controlled according to the other control strategy, and so on. For example, it can be executed according to the first control strategy first, then according to the second control strategy, and then again according to the first control strategy, and so on. For another example, it can also be executed according to the second control strategy first, then according to the first control strategy, and then again according to the second control strategy, and so on.

[0154] In the above embodiments, the lower limit value of SOC and upper limit The specific value of can be varied. For example, the lower limit It can be equal to 0, or greater than 0; for example, the upper limit It can be equal to 100%, or it can be less than 100%.

[0155] Among them, the lower limit When it is not equal to 0 but greater than 0, it means that the battery can be controlled not to be fully discharged, and a shallow discharge process can be achieved, which is beneficial to extend the battery life and reduce the battery cost. is not equal to 0, but is greater than 0. In some embodiments, ,For example, In this way, a more suitable shallow discharge process can be achieved, which can more effectively extend the battery life and reduce the battery cost.

[0156] When the upper limit When it is not equal to 100% but less than 100%, it means that the battery can be controlled not to be fully charged, that is, not to be charged to 100%. In this way, a shallow charging process can be achieved, which effectively prolongs the service life of the battery and reduces the cost of using the battery. An example of not being equal to 100%, but being less than 100%, in some embodiments, .For example, In this way, a more suitable shallow charging process can be achieved, which can more effectively extend the battery life and reduce the battery cost.

[0157] The vehicle power generation control method of the aforementioned embodiments can be performed under the control of a controller. Therefore, the present application also provides a controller, which includes a memory and a processor coupled to the memory, and the processor is configured to execute the vehicle power generation control method of any embodiment based on the instructions stored in the memory. Specifically, see Figure 4 In some embodiments, the controller includes a range-extender control unit (RCU), which controls the range-extender. In addition, in some embodiments, the controller also includes at least one of an engine control unit (ECU), a generator control unit (GCU), a travel motor control unit (GCU), an operating motor control unit (GCU), a vehicle control unit (VCU), and a battery management system (BMS). Different controllers communicate with each other and cooperate to control each step to proceed smoothly.

[0158] In addition, the present application also provides a vehicle, which includes a range extender and a controller of any embodiment. The vehicle may be a family car, a commercial vehicle, an engineering vehicle, or other vehicles, and in particular, may be various engineering vehicles, so as to better solve the power generation control problem of various engineering vehicles including the range extender.

[0159] In addition, the present application also provides a storage medium, and the corresponding storage medium stores computer instructions, and the computer instructions are executed by a processor such as the vehicle power generation control method of any embodiment.

[0160] Next, combine Figure 1-Figure 4 The illustrated embodiments provide a further description of the present application.

[0161] like Figure 1-Figure 4 As shown, in this embodiment, the vehicle power generation control method is an adaptive power vehicle power generation control method, which is used for engineering vehicles and first presets a characteristic power based on a large amount of working condition data. , and obtain the optimal power generation MAP of the range extender according to the engine universal characteristic MAP and generator efficiency MAP of the range extender, and based on the characteristic power And the optimal power generation power MAP of the range extender, obtain the range extender at each characteristic power The optimal power generation under the condition of the vehicle is obtained, and then the actual power required by each functional module of the vehicle is obtained in real time during the actual operation of the vehicle. The actual power required by the vehicle is obtained by integrating the power over time within the preset time and dividing it by the preset time. , and according to the actual power required by the vehicle , characteristic power and the SOC value of the battery, determine the working status and operating power of the range extender and battery, and enable the vehicle to switch between pure electric mode and the range extender's optimal power generation mode according to different working conditions, thereby achieving shallow charging and discharging of the battery and ensuring that the operating power of the range extender is always at the optimal power generation point, thereby effectively reducing the fuel consumption of the vehicle and achieving the goal of energy conservation and emission reduction.

[0162] Specifically, if Figure 1 and Figure 2 As shown, the vehicle power generation control method of this embodiment includes steps S100 to S500.

[0163] Wherein, step S100 is to obtain characteristic power parameters based on typical operating conditions.

[0164] Specifically, step S100 further includes:

[0165] S101, based on the adapted engineering vehicle, the power of each functional module (travel module, operation module, attachment 1 and attachment 2, etc.) under each typical working condition is collected, and based on the cycle time of each typical working condition, a reasonable time period is preset to obtain a preset time t;

[0166] S102, integrating the power of each functional module under each typical working condition over time to obtain the work done, and then dividing it by the preset time t to obtain the average power under each typical working condition ;

[0167] S103, based on average power under typical working conditions , obtain the characteristic power under each typical working condition .

[0168] It can be seen that step S100 obtains the power requirements of each functional module of the engineering vehicle under each typical working condition based on a large amount of sample real vehicle typical working condition data collected, and calculates the power requirements of each functional module under each typical working condition according to the formula =( + +......+ ) / t, integrate the power of each functional module over time and divide it by the preset time t to obtain the average power demand under each typical working condition , and then based on the average power demand under each typical operating condition , get the characteristic power under each typical working condition , divided into light load, light-medium load, medium load, medium-heavy load and heavy load conditions.

[0169] Step S200 is to obtain the optimal power generation power MAP of the range extender.

[0170] Specifically, step S200 further includes:

[0171] S201, obtaining an engine universal characteristic MAP of the range extender and a power generation efficiency MAP of the generator;

[0172] S202, using a matlab script, fitting the engine universal characteristic MAP of the range extender and the power generation efficiency MAP of the generator into a first power generation MAP of the range extender; and

[0173] S203: Based on the bench test, the first power generation MAP is corrected to obtain the optimal power generation MAP of the range extender.

[0174] It can be seen that step S200 obtains the universal characteristic MAP of the engine of the range extender and the efficiency MAP of the generator, fits the first power generation MAP of the range extender, and performs correction and calibration on the test bench to obtain the optimal power generation MAP of the range extender. The corresponding optimal power generation MAP is as follows: Figure 3 shown.

[0175] It can be understood that there is no restriction on the order of step S200 and step S100, and they can be executed simultaneously or one after another.

[0176] Step S300 is to determine the range extender at each characteristic power The optimal power generation under .

[0177] In step S300, each characteristic power determined in step S100 is Corresponding to the power point in the optimal power generation power MAP of the range extender determined by S200, each characteristic power is locked The corresponding optimal power generation power can make the range extender operate at the corresponding optimal power generation power under various typical working conditions, so as to achieve the highest power generation per unit fuel consumption and effectively save fuel consumption.

[0178] Step S400 is to calculate the actual power required by the whole machine. .

[0179] Specifically, step S400 further includes:

[0180] S401, obtain the power of the whole machine's travel motor, operating motor and other accessory powers in real time, and calculate the power according to the formula =( + +......+ ) / t, perform power-time integration to obtain the actual power demand of the vehicle, and divide it by the preset time , to obtain the actual average power in the cycle condition ;

[0181] S402, based on the actual average power in the cycle condition , get the actual power required by the vehicle .

[0182] Among them, the travel motor power and the working motor power can be obtained by obtaining the speed and torque of the corresponding motor based on the formula P=NT / 9550.

[0183] Step S500 is to calculate the actual power required by the vehicle. , the SOC state of the battery and the range extender at each characteristic power The optimal power generation under the condition of , determines the working status of the range extender and the battery, and the actual operating power of the range extender.

[0184] Specifically, step S500 further includes:

[0185] S501, based on the actual power required by the vehicle , determine whether the vehicle is in light load or light-medium load condition, or in medium load, medium-heavy load or heavy load condition;

[0186] S502: When the vehicle is in light load or light-medium load condition, the actual power required and The size relationship between them controls the range extender to not work, or to generate electricity at the optimal power;

[0187] S503: When the whole machine is in medium load, medium-heavy load or heavy load condition, the range extender is always operated at the optimal power generation and the actual power required is calculated. The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions The relationship between the size and the lower limit of the battery SOC and upper limit , determine the optimal power generation capacity of the range extender and whether the electricity generated by the range extender is also used to charge the battery when it is used in various functional modules of the vehicle.

[0188] More specifically, in this embodiment, the lower limit value of SOC =40%, upper limit of SOC =80%, and , is the actual battery capacity, It is the total power when the battery is fully charged (i.e. SOC=100%).

[0189] If the actual required power calculated in step S400 is For light load or light-medium load conditions, and Make logical judgments and perform power generation control according to the following table:

[0190] If the actual required power calculated in step S400 is If it is medium load, medium-heavy load or heavy load condition, , , Make logical judgments and perform power generation control according to the following table:

[0191] The above steps are carried out under the control of the controller. Figure 4 As shown, the engineering vehicle of this embodiment includes multiple controllers such as RCU, ECU, GCU, VCU, traveling GCU, working GCU and BMS, wherein the ECU and GCU are both communicatively connected with the RCU, and the RCU, traveling GCU, working GCU and BMS are all communicatively connected with the VCU to control and complete each step of this embodiment.

[0192] The vehicle power generation control method of this embodiment has the following advantages:

[0193] (1) By presetting the characteristic power of typical working conditions , and determine the range extender at each characteristic power The optimal power generation and actual required power under As well as the battery SOC, the working status of the range extender and the battery and the actual operating power of the range extender are controlled, so that the range extender is either not working or working at the optimal power generation power that matches the actual working conditions. This can effectively reduce the fuel consumption of the vehicle, save energy and reduce emissions, and has strong robustness, which can be applied to various engineering vehicles;

[0194] (2) By integrating and accumulating the power of each functional module under each typical working condition and dividing it by the preset time, the characteristic power under each typical working condition can be obtained. More accurate, combined with the optimal power generation MAP obtained by bench correction, the locked The optimal power generation under the condition is both accurate and can save fuel precisely;

[0195] (3) By adopting the calculation method of real-time monitoring and integration and averaging, the actual power demand of the whole vehicle is cumulatively calculated and predicted, which can more accurately predict the actual power demand of the whole machine, meet the sudden change of the whole machine working condition, and improve the running stability of the whole vehicle;

[0196] (4) By controlling the range extender while taking into account the battery life and shallowly charging and discharging the battery, the battery power can be kept within a stable range, effectively extending the battery life and reducing the battery cost.

[0197] The above description is only an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A vehicle power generation control method, characterized in that: include: Determine the characteristic power of a vehicle including a range extender under various typical operating conditions , the typical operating conditions of the vehicle include light load, light-medium load, medium load, medium-heavy load and heavy load conditions; Based on the characteristic power of the vehicle under various typical operating conditions , determine the range extender at each characteristic power The optimal power generation under the condition of the optimal power generation is the power generation with the highest power generation under the unit fuel consumption of the range extender; Calculate the actual power required for the vehicle ; According to the actual power required by the vehicle , determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under .

2. The vehicle power generation control method according to claim 1, characterized in that: Determine the characteristic power of the vehicle including the range extender under various typical operating conditions include: Determining the power of the vehicle under various typical operating conditions; Based on the acquired power of the vehicle under each typical operating condition, determine the vehicle under each typical operating condition within a preset time The average power within According to the vehicle under various typical working conditions at the preset time The average power within the range determines the characteristic power of the vehicle under each typical operating condition. .

3. The vehicle power generation control method according to claim 2, characterized in that: Based on the acquired power of the vehicle under each typical operating condition, determining the vehicle under each typical operating condition within a preset time When the average power is within =( + +......+ ) / t, determine the vehicle under each typical working condition within a preset time The average power within is the average power of the vehicle under a typical operating condition, , … It is the power of each functional module of the vehicle under corresponding typical working conditions, and the functional modules of the vehicle include at least one of a traveling module, an operating module and an accessory module.

4. The vehicle power generation control method according to claim 2, characterized in that: According to the vehicle under various typical working conditions at the preset time The average power within the range determines the characteristic power of the vehicle under each typical operating condition. include: The vehicle is driven at a preset time under various typical working conditions. The average power within is determined as the characteristic power of the vehicle under each typical working condition. .

5. The vehicle power generation control method according to claim 1, characterized in that: Determine the range extender at each characteristic power The optimal power generation under the condition includes: Determining an optimal power generation power MAP of the range extender; The characteristic powers of the vehicle The optimal power generation power MAP of the range extender is corresponded to obtain the range extender at each characteristic power The optimal power generation under .

6. The vehicle power generation control method according to claim 5, characterized in that: Determining the optimal power generation power MAP of the range extender includes: Obtaining a universal characteristic MAP of the engine of the range extender and an efficiency MAP of the generator; The universal characteristic MAP of the engine and the efficiency MAP of the generator are fitted, and based on the fitting result, the optimal power generation MAP of the range extender is determined.

7. The vehicle power generation control method according to claim 6, characterized in that: Fitting the universal characteristic MAP of the engine and the efficiency MAP of the generator, and determining the optimal power generation MAP of the range extender based on the fitting result includes: Fitting the universal characteristic MAP of the engine and the efficiency MAP of the generator to obtain a first power generation MAP of the range extender; The first power generation power MAP of the range extender is corrected to obtain the optimal power generation power MAP of the range extender.

8. The vehicle power generation control method according to claim 7, characterized in that: Correcting the first power generation power MAP of the range extender includes: Performing a bench test on the range extender; According to the bench test result, the first power generation power MAP of the range extender is corrected.

9. The vehicle power generation control method according to claim 1, characterized in that: Calculate the actual power required for the vehicle include: Obtaining actual power of the vehicle; Based on the actual power of the vehicle, determine the vehicle at a preset time The actual average power within ; Based on the vehicle at the preset time The actual average power within , determine the actual required power of the vehicle .

10. The vehicle power generation control method according to claim 9, characterized in that: Based on the actual power of the vehicle, it is determined that the vehicle The actual average power within When, according to the formula =( + +......+ ) / t, determine the vehicle at the preset time The actual average power within ,in, , … is the actual power of each functional module of the vehicle, and the functional module of the vehicle includes at least one of a traveling module, an operation module and an accessory module.

11. The vehicle power generation control method according to claim 9, characterized in that: Based on the vehicle at the preset time The actual average power within , determine the actual required power of the vehicle include: The vehicle is moved to the preset time The actual average power within , determined as the actual required power of the vehicle .

12. The vehicle power generation control method according to any one of claims 1 to 11, characterized in that: According to the actual power required by the vehicle , determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under the condition includes: According to the actual power required by the vehicle and the lower limit value of the SOC of the vehicle battery and upper limit , determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power Optimal power generation under ; in, , .

13. The vehicle power generation control method according to claim 12, characterized in that: According to the actual power required by the vehicle and the lower limit value of the SOC of the vehicle battery and upper limit , determine whether the range extender is working, and when the range extender is working, make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under the condition includes: According to the actual power required by the vehicle The characteristic power of the vehicle under various typical operating conditions The size relationship between them determines whether the vehicle is in a light load or light-medium load condition, or in a medium load, medium-heavy load or heavy load condition; and At least one of the following: When the vehicle is in a light load or light-medium load condition, according to the actual power required by the vehicle and The size relationship between the range extender and the vehicle is determined to determine whether the range extender is working, and when the range extender is working, the power of the range extender is equal to the actual power required by the vehicle. The corresponding characteristic power The optimal power generation under , is the actual charge of the battery, is the total charge of the battery when fully charged, is the preset time; When the vehicle is in a medium load, medium-heavy load or heavy load condition, the range extender is operated and the power required by the vehicle is increased according to the actual power required by the vehicle. The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions The relationship between the size and the lower limit of the SOC of the battery and upper limit , determine the actual power required by the vehicle The corresponding characteristic power The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions Which one of the above is used to make the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under .

14. The vehicle power generation control method according to claim 13, characterized in that: According to the actual power required by the vehicle and The size relationship between the range extender and the vehicle is determined to determine whether the range extender is working, and when the range extender is working, the power of the range extender is equal to the actual power required by the vehicle. The corresponding characteristic power The optimal power generation under the condition includes: exist When the range extender is not operated, the battery is operated, and when the SOC value of the battery drops to the lower limit value When the range extender is operated at the power actually required by the vehicle The corresponding characteristic power charging the battery at the optimal power generation under the conditions of exist > When the range extender is operated at the power actually required by the vehicle The corresponding characteristic power At the optimal power generation under the condition of When the range extender stops working, the battery starts working.

15. The vehicle power generation control method according to claim 13, characterized in that: According to the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions The relationship between the size and the lower limit of the SOC of the battery and upper limit , determine the actual power required by the vehicle The corresponding characteristic power The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions Which one of the following makes the power of the range extender equal to the actual power required by the vehicle The corresponding characteristic power The optimal power generation under the condition includes: Determine the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions are equal; and At least one of the following: If the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions If the characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions is equal, The actual power required The characteristic power is equal , as the actual power required by the vehicle The corresponding characteristic power and make the range extender work at the power actually required by the vehicle The corresponding characteristic power Under the optimal power generation under the condition of the above, supplying power for energy consumption of the vehicle; If the actual power required by the vehicle The characteristic power of the vehicle under medium load, medium-heavy load or heavy load conditions If they are not equal, then according to the SOC value of the battery and the lower limit value and upper limit The size relationship between them determines the actual power required by the vehicle The corresponding characteristic power The actual power required Two adjacent characteristic powers Which one of the above mentioned range extenders is equal to the actual required power? The corresponding characteristic power The optimal power generation under .

16. The vehicle power generation control method according to claim 14, characterized in that: According to the SOC value of the battery and the lower limit value and upper limit The size relationship between them determines the actual power required by the vehicle The corresponding characteristic power The actual power required Two adjacent characteristic powers Which one of the above mentioned range extenders is equal to the actual required power? The corresponding characteristic power The optimal power generation under the condition includes at least one of the following: When the SOC value of the battery is greater than the lower limit , and is less than or equal to the upper limit value The actual power required will be Two adjacent characteristic powers Smaller than the actual power required The characteristic power , as the actual power required by the vehicle The corresponding characteristic power and make the power of the range extender equal to the actual required power The corresponding characteristic power The optimal power generation under the condition of the range extender and the battery together provide power for the vehicle energy consumption until the SOC value of the battery drops to the lower limit value. and / or, When the SOC value of the battery is less than the upper limit value , and is greater than or equal to the lower limit The actual power required will be Two adjacent characteristic powers Greater than the actual power required The characteristic power , as the actual power required by the vehicle The corresponding characteristic power and make the power of the range extender equal to the actual required power The corresponding characteristic power The range extender charges the battery and supplies power to the vehicle until the SOC value of the battery reaches the upper limit value. .

17. The vehicle power generation control method according to claim 12, characterized in that: , and / or, .

18. The vehicle power generation control method according to claim 17, characterized in that: , and / or, .

19. A controller, characterized in that: It comprises a memory and a processor coupled to the memory, wherein the processor is configured to execute the vehicle power generation control method according to any one of claims 1 to 18 based on instructions stored in the memory.

20. A vehicle, comprising a range extender, characterized in that: Also included is the controller of claim 19.

21. The vehicle according to claim 20, characterized in that The vehicle is an engineering vehicle.

22. A storage medium, characterized in that: The storage medium stores computer instructions, and the computer instructions are executed by the processor according to the vehicle power generation control method as described in any one of claims 1-18.

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