Range extender power generation control method and device, range extender system and vehicle

Abstract

The invention provides a range extender power generation control method and device, a range extender system and a vehicle. The range extender power generation control method comprises the steps that the range extender efficiency eff is determined according to the temperature t of a generator of the range extender; and according to the efficiency eff of the range extender and the power generation power Pe which needs to be provided by the range extender, the mechanical power Pm which needs to be emitted by the range extender is determined. The processor of the control device is configured to execute the range extender power generation control method. The range extender system comprises an engine, a generator and the control device. The vehicle comprises the range extender system. According to the technical scheme, the actual generated power of the range extender and the required power following performance of the whole vehicle can be improved.

Description

Technical Field

[0001] The present disclosure relates to the field of vehicle control technology, and in particular to a power generation control method of a range extender, a control device, a range extender system and a vehicle. Background Art

[0002] In order to deal with energy and environmental issues, all walks of life are paying more and more attention to new energy technologies. The impact of new energy technologies on the Chinese automobile market has already produced a qualitative change in the industrial structure, and is also the main direction for the transformation and upgrading of the global automobile industry and green development. Many counties and cities across the country have designated non-road mobile machinery prohibited areas, and the new energy era of construction machinery has begun.

[0003] The current mainstream technical routes of new energy products include: pure electric, hybrid, fuel cell, low-carbon internal combustion engine, etc. Among them, hybrid is more suitable for non-road engineering machinery applications at this stage, and is one of the most practical ways to solve problems such as emissions and energy. This solution can effectively solve the problems of high purchase cost, mileage anxiety, and imperfect charging facilities of pure electric products, and form complementary advantages with pure electric products.

[0004] Range extender technology is an important branch of hybrid mode. The range extender is a combination of an engine and a generator. The range extender converts the power generated by the engine into electrical energy, and the drive motor further drives the vehicle. Construction machinery will not constantly adjust the working conditions in a short period of time like commercial vehicles. It works for a long time under fixed working conditions and requires a lot of power. Therefore, it is very important for construction machinery to maintain a stable power generation of the range extender.

[0005] However, in the related technologies known to the inventors, as the construction machinery operates for a long time under the same working conditions, the actual power generation of the range extender will gradually deviate from the required power of the whole vehicle, and the actual power generation has poor tracking performance with the required power of the whole vehicle. Summary of the invention

[0006] The purpose of the present disclosure is to provide a range extender power generation control method, a control device, a range extender system and a vehicle, so as to improve the actual power generation of construction machinery and the tracking performance of the power required by the whole vehicle.

[0007] A first aspect of the present disclosure provides a range extender power generation control method, comprising:

[0008] Determine the range extender efficiency eff according to the temperature t of the generator of the range extender;

[0009] The mechanical power Pm that the range extender needs to generate is determined according to the range extender efficiency eff and the generated power Pe that the range extender needs to provide.

[0010] In some embodiments, the range extender power generation control method further includes:

[0011] Determine the speed n of the engine of the range extender according to the mechanical power Pm that the range extender needs to generate;

[0012] The torque T output by the generator is determined according to the corresponding relationship among the rotation speed of the engine, the torque output by the generator and the efficiency of the range extender.

[0013] In some embodiments of the range extender power generation control method, the corresponding relationship is different in different temperature intervals of the generator, and the torque T output by the generator is determined according to the corresponding relationship in the temperature interval to which the temperature t of the generator belongs.

[0014] In some embodiments of the range extender power generation control method, when the engine speed n is determined according to the mechanical power Pm that the range extender needs to generate, at least one of the following indicators is within a preset range: the fuel consumption of the engine, the efficiency of the generator, and the NVH of the range extender.

[0015] In some embodiments, the range extender power generation control method further includes: after determining the mechanical power Pm that the range extender needs to generate, if at least one of the following judgment conditions is met, reducing the mechanical power Pm that the range extender needs to generate, the judgment conditions including:

[0016] The temperature te of the engine of the range extender is higher than a first preset temperature;

[0017] The temperature t of the generator is higher than a second preset temperature;

[0018] The temperature tc of the generator controller of the range extender is higher than a third preset temperature;

[0019] The range extender controller of the range extender receives a fault signal from the engine and / or the generator and / or the generator controller.

[0020] In some embodiments, the range extender power generation control method further includes:

[0021] enabling the range extender to operate with the mechanical power Pm and generate electricity;

[0022] The actual power generation power Pa of the range extender is obtained according to the current I and voltage U outputted by the range extender during power generation. If the deviation of the actual power generation power Pa of the range extender from the power generation power Pe required to be provided is greater than the preset deviation, the mechanical power Pm is re-determined.

[0023] In the range extender power generation control method of some embodiments, re-determining the mechanical power Pm includes: re-obtaining the temperature t of the generator, and re-determining the range extender efficiency eff according to the re-obtained temperature t of the generator.

[0024] A second aspect of the present disclosure provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the range extender power generation control method as described in the first aspect of the present disclosure is implemented.

[0025] A third aspect of the present disclosure provides a control device, comprising:

[0026] Memory; and

[0027] A processor is coupled to the memory, and the processor is configured to execute the range extender power generation control method as described in the first aspect of the present disclosure based on instructions stored in the memory.

[0028] A fourth aspect of the present disclosure provides a range extender system, comprising:

[0029] engine;

[0030] a generator driven by the engine; and

[0031] The control device described in the third aspect of the present disclosure is communicatively connected with the engine and the generator.

[0032] A fifth aspect of the present disclosure provides a vehicle, comprising the range extender system described in the fourth aspect of the present disclosure.

[0033] Taking into account that the efficiency of the range extender changes accordingly in different temperature ranges, in the range extender power generation control method provided by the present disclosure, the corresponding range extender efficiency eff is determined according to the temperature t of the generator, and the mechanical power Pm required to be emitted by the range extender is obtained thereby. The mechanical power Pm required to be emitted by the range extender can be dynamically adjusted according to the temperature t of the generator, so that the actual power generation power Pa of the range extender can be made closer to the power generation power Pe required to be provided in different temperature ranges, so that the actual power generation power Pa of the range extender and the power generation power Pe required to be provided have good followability.

[0034] It can be seen that the range extender power generation control method provided in the embodiment of the present disclosure can, on the one hand, avoid the range extender having low power generation efficiency and insufficient power generation in a high temperature range after working for a long time, thereby affecting normal use; on the other hand, it can prevent the range extender from overcharging the battery in a temperature range where the range extender has a higher efficiency, thereby helping to increase the service life of the battery and the corresponding electronic control system.

[0035] The computer-readable storage medium and control device provided by the present disclosure have the advantages of the range extender power generation control method provided by the present disclosure.

[0036] The range extender system provided by the embodiment of the present disclosure has the advantages of the range extender power generation control method provided by the embodiment of the present disclosure.

[0037] The vehicle provided by the embodiments of the present disclosure has the advantages of the range extender system provided by the embodiments of the present disclosure.

[0038] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0040] Figure 1 Schematic diagram of the control principle of the range extender system of some embodiments of the present disclosure.

[0041] Figure 2 The present invention is a flowchart of a range extender power generation control method according to some embodiments of the present invention.

[0042] Figure 3 The present invention is a flowchart of determining the temperature interval to which the temperature of a generator belongs in some embodiments of the present disclosure.

[0043] In the accompanying drawings, each reference numeral represents:

[0044] 10. Range extender; 11. Engine; 12. Generator; 13. Engine controller; 14. Generator controller; 15. Range extender controller; 20. Vehicle controller. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, 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 disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present disclosure. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, these technologies, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0047] In the description of the present disclosure, 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 disclosure.

[0048] In the description of the present disclosure, it is necessary to understand that the orientation or positional relationship indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present disclosure 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 orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0049] In the process of realizing the present disclosure, the inventors found that the temperature of the generator is the biggest factor affecting the efficiency of the range extender, and the range extender power generation strategy in the related art does not take the temperature into consideration. Under low temperature conditions, the heat energy loss of the generator is small. When generating electricity for a long time, the heat energy loss of the generator is large. Even if the range extender works under fixed conditions with constant speed and torque, its actual power generation is different. As the range extender runs, the temperature of the generator rises, and the actual power generation of the range extender becomes smaller. The higher the temperature, the greater the difference between the actual power generation of the range extender and the target power generation, resulting in poor followability of the actual power generation to the target power generation, which cannot meet the needs of the entire vehicle.

[0050] To improve the above problems, embodiments of the present disclosure provide a range extender power generation control method, a computer-readable storage medium, a control device, a range extender system, and a vehicle.

[0051] refer to Figures 1 to 3Some embodiments of the present disclosure provide a range extender power generation control method, including: determining the range extender efficiency eff according to the temperature t of the generator 12 of the range extender 10; determining the mechanical power Pm that the range extender 10 needs to generate according to the range extender efficiency eff and the power generation power Pe that the range extender 10 needs to provide.

[0052] The range extender power generation control method provided in the embodiment of the present disclosure can be based on Figure 1 The range extender system shown in the figure is implemented, and the range extender system includes a range extender 10 and a vehicle controller 20 ( Figure 1 The range extender 10 includes an engine 11, a generator 12, and an engine controller 13 ( Figure 1 ECU), generator controller 14 ( Figure 1 GCU) and range extender controller 15 ( Figure 1 RCU in the vehicle controller 20). The vehicle controller 20 is connected to the range extender controller 15 in communication, and the range extender controller 15 is connected to the engine controller 13 and the generator controller 14 in communication. The range extender controller 15 can obtain the temperature and speed of the engine 11 and the temperature and torque of the generator 12 and other state information, and obtain the power generation power Pe required to be provided by the generator 12 through the vehicle controller 20. The engine controller 13 sends a speed control instruction to the engine 11 based on the speed control signal sent by the range extender controller 15. The generator controller 14 sends a torque control instruction to the generator 12 based on the torque control signal sent by the range extender controller 15. The information exchange between the engine controller 13, the generator controller 14, the range extender controller 15 and the vehicle controller 20 can be realized through the CAN bus.

[0053] Optionally, the generator 12 is an ISG motor (Integrated Starter Generator). During the starting phase of the engine 11, the ISG motor can serve as a power source for the engine 11, and applies a given torque to the engine 11 according to a specific model of the engine 11 to drive the engine 11 to reach a certain speed.

[0054] Optionally, the transmission form of the engine 11 and the generator 12 is coaxial transmission, that is, the output shaft of the engine 11 directly drives the generator 12. In this case, the rotation speed n of the engine 11 and the rotation speed n of the generator can be regarded as approximately equal. Of course, the engine 11 and the generator 12 can also adopt other transmission forms that can achieve extended-range power generation, and a transmission mechanism, such as a reduction transmission mechanism, can be set between the engine 11 and the generator 12.

[0055] The power generation Pe required to be provided by the range extender 10 can be obtained according to the SOC (State of Charge) value of the vehicle's battery and the vehicle's workload. The range extender efficiency eff, the power generation Pe required to be provided by the range extender 10, and the mechanical power Pm required to be generated by the range extender 10 satisfy the following relationship: Pe=Pm*eff, that is, Pe is the product of Pm and eff.

[0056] Each value of the range extender efficiency eff may correspond to a certain value of the temperature t of the generator 12, or refer to Figure 3 , corresponding to a certain range of the temperature t of the generator 12.

[0057] Taking into account that the efficiency of the range extender changes accordingly at different temperatures, in the range extender power generation control method provided by the embodiment of the present disclosure, the corresponding range extender efficiency eff is determined according to the temperature t of the generator 12, and the mechanical power Pm required to be emitted by the range extender 10 is obtained thereby. The mechanical power Pm required to be emitted by the range extender 10 can be dynamically adjusted according to the temperature t of the generator 12, so that the actual power generation power Pa of the range extender 10 can be made closer to the power generation power Pe required to be provided within different temperature intervals, so that the actual power generation power Pa of the range extender 10 has good followability to the power generation power Pe required to be provided.

[0058] It can be seen that the range extender power generation control method provided in the embodiment of the present disclosure can, on the one hand, avoid the range extender having low power generation efficiency and insufficient power generation in a high temperature range after working for a long time, thereby affecting normal use; on the other hand, it can prevent the range extender from overcharging the battery due to the actual power generation output of the range extender being too large in a temperature range where the range extender has higher efficiency, such as in a cold working environment, which is beneficial to improving the service life of the battery and the corresponding electronic control system.

[0059] In some embodiments, the range extender power generation control method further includes: determining the speed n of the engine 11 of the range extender 10 according to the mechanical power Pm that the range extender 10 needs to generate; and determining the torque T output by the generator 12 according to the corresponding relationship between the speed of the engine 11, the torque output by the generator 12 and the efficiency of the range extender.

[0060] In the case where the engine 11 and the generator 12 are coaxially driven, the rotation speed n of the engine 11 is equal to the rotation speed of the generator 12, and the torque T output by the generator 12 can be obtained based on the following relationship: Pe=Pm*eff=n*T / 9550, where the units of Pe and Pm are kW, the unit of n is RPM, and the unit of T is Nm. In the case where other transmission mechanisms are provided between the engine 11 and the generator 12, the torque T output by the generator 12 needs to further consider the transmission ratio and transmission efficiency of the transmission mechanism.

[0061] The corresponding relationship between the speed of the engine 11, the torque output by the generator 12 and the range extender efficiency can be obtained by calibration through experiments, and the corresponding relationship can be specifically expressed in the form of Table 1 or a fitting curve. In Table 1, n1, n2, n3, n4, n5, n6, n7, n8 respectively represent different values ​​of the speed n, T1, T2, T3, T4, T5, T6, T7, T8 respectively represent different values ​​of the torque T, eff11, eff12, eff13, ..., eff87, eff88 respectively represent different values ​​of the range extender efficiency eff, and according to the determined speed n of the engine 11 and the range extender efficiency eff, the corresponding torque T of the generator 12 can be queried from Table 1. For example, referring to Figure 3 , if t≤t0, the value of the range extender efficiency eff is determined as eff(a); then the value of the speed n is further determined as n3, and the value eff33 of the range extender efficiency eff that is consistent with eff(a) is found in Table 1, thereby the value of the torque T corresponding to the value eff33 can be determined as T3.

[0062] Table 1 Correspondence between speed, torque and range extender efficiency

[0063]

[0064] In the range extender power generation control method of this embodiment, after determining the mechanical power Pm that the range extender 10 needs to generate, the range extender efficiency eff and the speed n of the engine 11, the torque T output by the generator 12 can be further determined according to the above correspondence, and the speed n of the engine 11 and the torque T of the generator 12 are distributed, so as to control the engine 11 and the generator 12 to operate according to the corresponding control targets.

[0065] for Figure 1 The range extender system shown, after assigning corresponding control targets to the engine 11 and the generator 12, can directly send a speed control command to the engine 11 through the engine controller 13 and directly send a torque control command to the generator 12 through the generator controller 14, thereby driving the engine 11 to operate at a corresponding speed and the generator 12 to operate at a corresponding torque.

[0066] In some embodiments, the corresponding relationship is different in different temperature ranges of the generator 12 , and the torque T output by the generator 12 is determined according to the corresponding relationship within the temperature range to which the temperature t of the generator 12 belongs.

[0067] The correspondence between the speed of the engine 11, the torque output by the generator 12 and the efficiency of the range extender can be calibration data under different temperature conditions. The range extender power generation control method of this embodiment takes into account the differences in the above correspondence in different temperature ranges. The range extender efficiency and the above correspondence are specifically determined according to the temperature t of the generator 12, which is conducive to further improving the followability of the actual power generation Pa of the range extender 10 to the power generation Pe required to be provided.

[0068] Specifically, Figure 3 The temperature interval used to determine the range extender efficiency eff can be divided more finely, and the temperature interval used to determine the above corresponding relationship can be divided larger.

[0069] In some embodiments, when the speed n of the engine 11 is determined according to the mechanical power Pm that the range extender 10 needs to generate, at least one of the following indicators is within a preset range: fuel consumption of the engine 11 , efficiency of the generator 12 , and NVH of the range extender 10 .

[0070] NVH is the abbreviation of noise, vibration and harshness. The NVH of the range extender 10 can comprehensively consider the NVH of the engine 11 and the NVH of the generator 12. Figure 1 In this embodiment, the optimal curve can be obtained through the corresponding relationship between the fuel consumption of the engine 11 and the speed n of the engine 11, the corresponding relationship between the efficiency of the generator 12 and the speed n, and the corresponding relationship between the NVH of the range extender 10 and the speed n. The optimal curve can be a curve representing the corresponding relationship between the speed n of the engine 11 when the fuel consumption of the engine 11, the efficiency of the generator 12, and the NVH of the range extender 10 are within the ideal range when the mechanical power Pm takes different values, and then the speed of the engine 11 is determined by the optimal curve.

[0071] Taking into account that the speed n of the engine 11 is the main factor affecting the fuel consumption of the engine 11, the efficiency of the generator 12 and the NVH, in the range extender power generation control method of this embodiment, for the same mechanical power Pm, the speed n of the engine 11 that makes one or more of the above indicators reach a better range can be selected, thereby taking into account the followability of the actual power generation Pa of the range extender 10 to the required power generation Pe and the comfort of the vehicle driver.

[0072] In some embodiments, the range extender power generation control method further includes: after determining the mechanical power Pm that the range extender 10 needs to generate, if at least one of the following judgment conditions is met, reducing the mechanical power Pm that the range extender 10 needs to generate, the judgment conditions include: the temperature te of the engine 11 is higher than the first preset temperature; the temperature t of the generator 12 is higher than the second preset temperature; the temperature tc of the generator controller 14 of the range extender 10 is higher than the third preset temperature; the range extender controller 15 of the range extender 10 receives a fault signal of the engine 11 and / or the generator 12 and / or the generator controller 14.

[0073] In the range extender power generation control method of this embodiment, if at least one of the above judgment conditions is met, it indicates that the current working state of the range extender has caused the engine 11, the generator 12, the generator controller 14 and other components to approach the temperature limit that they can withstand, or has caused the above components to be in a fault state, and at least one of the above components has approached or is in a limit working state. At this time, by reducing the mechanical power Pm that the range extender 10 needs to generate, the power generation power of the range extender 10 can be reduced accordingly, which limits the actual power generation power of the range extender 10, thereby reducing the temperature of the components and protecting the components of the range extender from damage.

[0074] Optionally, the mechanical power Pm that the range extender 10 needs to generate is reduced by a certain proportional coefficient, and the specific value of the proportional coefficient can be determined, for example, according to at least one of the following parameters: the temperature te of the engine 11 and its changing trend, the temperature t of the generator 12 and its changing trend, the temperature tc of the generator controller 14 and its changing trend, the type of the fault signal of the engine 11, the type of the fault signal of the generator 12, and the type of the fault signal of the generator controller 14. According to the specific value of the proportional coefficient, the speed n of the engine 11 and the torque T output by the generator 12 are reduced.

[0075] In some embodiments, the range extender power generation control method further includes: operating the range extender 10 with a mechanical power Pm and generating electricity; obtaining the actual power generation power Pa of the range extender 10 according to the current I and voltage U output by the range extender 10 when generating electricity, and if the deviation of the actual power generation power Pa of the range extender 10 from the power generation power Pe required to be provided is greater than a preset deviation, re-determining the mechanical power Pm.

[0076] In this embodiment, the step of re-determining the mechanical power Pm can be set as a loop step. When the deviation of the actual power generation Pa of the range extender 10 relative to the required power generation Pe is less than or equal to the preset deviation, the loop is exited.

[0077] The current I and voltage U output by the range extender 10 during power generation can be collected by the generator controller 14 , and the collection results are fed back to the range extender controller 15 by the generator controller 14 , and compared with the power generation power Pe required to be provided in the range extender controller 15 .

[0078] In the range extender power generation control method of the present embodiment, the actual power generation Pa of the range extender 10 is compared with the power generation Pe that needs to be provided, and the actual power generation Pa=U*I. If the deviation between the two is greater than the preset deviation, it indicates that the actual power generation of the range extender 10 has poor followability to the power generation that needs to be provided. The actual power generation of the range extender 10 can be compensated by re-determining the mechanical power Pm, thereby further improving the control accuracy of the actual power generation Pa of the range extender 10 and improving the followability of the actual power generation Pa of the range extender 10 to the power generation Pe that needs to be provided.

[0079] In some embodiments, re-determining the mechanical power Pm includes: re-obtaining the temperature t of the generator 12 , and re-determining the range extender efficiency eff according to the re-obtained temperature t of the generator 12 .

[0080] Taking into account that the temperature sensor of the generator 12 may have accidental errors, or the temperature of the generator 12 has changed with the operation of the range extender 10, resulting in the previously determined range extender efficiency eff being difficult to ensure that the actual power generation Pa of the range extender 10 follows the required power generation Pe, in the range extender power generation control method of this embodiment, by re-obtaining the temperature t of the generator 12 and re-determining the range extender efficiency eff based on it, it is beneficial to continuously and stably meet the vehicle's demand for power generation for a long time.

[0081] Optionally, in the step of re-determining the mechanical power Pm, the re-acquired value of the temperature t can be obtained from multiple measured values ​​of the temperature t within a certain time range, that is, re-acquiring the temperature t of the generator 12 includes acquiring multiple measured values ​​of the temperature t within a preset time range. According to the multiple measured values ​​of the temperature t, it can be determined whether the reason for the large deviation of the actual power generation Pa of the range extender 10 is the measurement error of the temperature sensor or the continuous change of the temperature of the generator 12 itself, so that the average value of the multiple measured values ​​of the temperature t is used as the re-acquired value of the temperature t, or the final one of the multiple measured values ​​of the temperature t is used as the re-acquired value of the temperature t.

[0082] Some embodiments of the present disclosure provide a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the range extender power generation control method provided by the embodiments of the present disclosure is implemented.

[0083] The computer-readable storage medium provided by the embodiments of the present disclosure has the advantages of the range extender power generation control method provided by the embodiments of the present disclosure.

[0084] Some embodiments of the present disclosure provide a control device, including a memory and a processor. The processor is coupled to the memory, and the processor is configured to execute the range extender power generation control method provided by the embodiments of the present disclosure based on instructions stored in the memory.

[0085] The control device provided by the embodiment of the present disclosure has the advantages of the range extender power generation control method provided by the embodiment of the present disclosure.

[0086] refer to Figure 1 Some embodiments of the present disclosure provide a range extender system, including an engine 11, a generator 12, and a control device provided by an embodiment of the present disclosure. The generator 12 is driven by the engine 11. The control device is communicatively connected with the engine 11 and the generator 12.

[0087] The range extender system provided by the embodiment of the present disclosure has the advantages of the range extender power generation control method provided by the embodiment of the present disclosure.

[0088] In the range extender system provided in the embodiment of the present disclosure, the control device may include one or more controllers, for example, may include one or more of the aforementioned engine controller 13, generator controller 14, range extender controller 15 and vehicle controller 20. The working principle thereof may refer to the above-mentioned related description.

[0089] Some embodiments of the present disclosure provide a vehicle, including the range extender system provided by embodiments of the present disclosure.

[0090] The vehicle may be, for example, an engineering machine to which the range extender technology is applied. The vehicle provided by the embodiment of the present disclosure has the advantages of the range extender system provided by the embodiment of the present disclosure.

[0091] In some embodiments, the engine controller, generator controller, range extender controller and vehicle controller described above may be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware component or any appropriate combination thereof for performing the functions described in the present disclosure.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution for protection requested by the present disclosure.

Claims

1. A range extender power generation control method, characterized in that: include: Determining a range extender efficiency eff according to a temperature t of a generator (12) of the range extender (10); The mechanical power Pm that the range extender (10) needs to generate is determined based on the range extender efficiency eff and the generated power Pe that the range extender (10) needs to provide.

2. The range extender power generation control method according to claim 1, characterized in that: Also includes: Determining a rotation speed n of an engine (11) of the range extender (10) according to a mechanical power Pm that the range extender (10) needs to generate; The torque T output by the generator (12) is determined according to the corresponding relationship between the rotation speed of the engine (11), the torque output by the generator (12) and the efficiency of the range extender.

3. The range extender power generation control method according to claim 2, characterized in that: In different temperature ranges of the generator (12), the corresponding relationship is different, and the torque T output by the generator (12) is determined according to the corresponding relationship in the temperature range to which the temperature t of the generator (12) belongs.

4. The range extender power generation control method according to claim 2, characterized in that: When the speed n of the engine (11) is determined according to the mechanical power Pm that the range extender (10) needs to generate, at least one of the following indicators is within a preset range: the fuel consumption of the engine (11), the efficiency of the generator (12), and the NVH of the range extender (10).

5. The range extender power generation control method according to any one of claims 1 to 4, characterized in that: Also includes: After determining the mechanical power Pm that the range extender (10) needs to generate, if at least one of the following judgment conditions is met, the mechanical power Pm that the range extender (10) needs to generate is reduced, the judgment conditions comprising: The temperature te of the engine (11) of the range extender (10) is higher than a first preset temperature; The temperature t of the generator (12) is higher than a second preset temperature; The temperature tc of the generator controller (14) of the range extender (10) is higher than a third preset temperature; The range extender controller (15) of the range extender (10) receives a fault signal from the engine (11) and / or the generator (12) and / or the generator controller (14).

6. The range extender power generation control method according to any one of claims 1 to 4, characterized in that: Also includes: enabling the range extender (10) to operate with the mechanical power Pm and generate electricity; The actual power generation power Pa of the range extender (10) is obtained based on the current I and voltage U outputted by the range extender (10) when generating electricity; if the deviation of the actual power generation power Pa of the range extender (10) from the power generation power Pe required to be provided is greater than a preset deviation, the mechanical power Pm is re-determined.

7. The range extender power generation control method according to claim 6, characterized in that: Re-determining the mechanical power Pm includes: re-obtaining the temperature t of the generator (12), and re-determining the range extender efficiency eff according to the re-obtained temperature t of the generator (12).

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the range extender power generation control method as claimed in any one of claims 1 to 7 is implemented.

9. A control device, characterized in that: include: Memory; and A processor is coupled to the memory, and the processor is configured to execute the range extender power generation control method according to any one of claims 1 to 7 based on instructions stored in the memory.

10. A range extender system, characterized in that: include: Engine (11); A generator (12) driven by the engine (11); and The control device according to claim 9 is communicatively connected to the engine (11) and the generator (12).

11. A vehicle, characterized in that: Comprising the range extender system according to claim 10.

Images