Power generation control method and device of range extender, engineering mechanical vehicle and storage medium

Abstract

The application discloses an electricity generation control method and device of a range extender, an engineering mechanical vehicle and a storage medium. The range extender hybrid power system comprises a range extender, the range extender comprises a generator and an engine, and the electricity generation control method of the range extender comprises the following steps: when the range extender is in a working state, it is determined that the generator adopts speed control, the actual torque of the generator is obtained, and the upper limit value of the generation torque of the generator is set; it is determined that the engine adopts torque control, the actual torque of the engine is determined according to the engine demand torque of the engine, and the engine demand torque is corrected based on the actual torque of the generator and the actual torque of the engine. The application ensures that the range extender continuously and stably generates electricity while providing uniform and reliable power for the rotary tillage components of the power taking device, and guarantees the continuity and consistency of the rotary tillage operation of the whole vehicle.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery and vehicle technology, and in particular to a power generation control method, device, engineering machinery and vehicle, and storage medium for a range extender. Background Technology

[0002] With the deep integration of agricultural mechanization and new energy technologies, agricultural tractors, as the core equipment of agricultural production, are gradually upgrading towards hybrid and intelligent technologies to balance operational efficiency, fuel economy, and environmental protection requirements. Range-extended hybrid systems, with their core advantages of "pure electric drive experience and flexible fuel refueling," are increasingly being used in the field of agricultural tractors. They use a range extender (engine + generator) to charge the power battery or directly supply power to the drive motor, enabling the tractor to drive and operate. This effectively solves the pain points of insufficient range and inconvenient refueling in traditional pure electric tractors. At the same time, compared to traditional fuel tractors, it significantly reduces fuel consumption and exhaust emissions during operation.

[0003] In the core operational scenarios of tractors, rotary tillage is a crucial process for ensuring the quality of farmland preparation, and the power take-off method of the rotary tillage component directly affects the operational efficiency and system stability. In some existing agricultural tractor range-extended hybrid systems, to simplify the power transmission structure and improve energy utilization efficiency, the power take-off of the rotary tillage component directly comes from the range-extended hybrid system. That is, the mechanical energy of the range extender is transferred to the rotary tillage component via the power take-off shaft (PTO), driving the rotary tillage rollers to rotate and complete the soil breaking and leveling operations. This power take-off method eliminates the need for an additional independent drive unit, reducing the overall vehicle manufacturing cost and structural complexity, and has significant application value in large-scale farmland operations.

[0004] However, the rotary tillage operation environment of agricultural tractors is complex and variable. Soil resistance is affected by various factors such as soil texture, moisture content, tillage depth, and crop residue, exhibiting strong transient fluctuations. In actual operation, when the rotary tillage components encounter obstacles such as hard clods, gravel, or dense crop residue, the soil resistance increases instantaneously, causing a sharp rise in the torque taken up by the rotary tillage components. Conversely, when the obstacles are cleared or the system enters a soft soil area, the soil resistance decreases rapidly, and the torque taken up drops sharply. This significant transient change in torque taken up directly affects the power output of the range-extended hybrid system, posing a severe challenge to the speed stability of the range extender. Summary of the Invention

[0005] This invention provides a power generation control method, device, engineering machinery vehicle, and storage medium for a range extender, in order to solve the problems faced by existing agricultural tractor range-extended hybrid power systems when adapted for rotary tillage operations, such as large transient fluctuations in power take-off torque, poor speed stability of the range extender, and impact on work quality and reliability of the range-extended hybrid power system.

[0006] According to one aspect of the present invention, a power generation control method for a range extender is provided. The range-extended hybrid power system includes a range extender, which includes a generator and an engine. The power generation control method for the range extender includes:

[0007] When the range extender is in operation, it is determined that the generator uses speed control, and the actual torque of the generator is obtained and the upper limit value of the generator torque is set.

[0008] The engine is determined to use torque control, and the actual engine torque is determined based on the engine's required torque. The engine's required torque is then corrected based on the generator's actual torque and the engine's actual torque.

[0009] Optionally, the range-extended hybrid system also includes a power take-off unit connected to a generator;

[0010] Before setting the upper limit of the generator's output torque, the following is also included:

[0011] Obtain the required speed of the generator and the electrical power used by the generator to take power;

[0012] Set the upper limit of the generator's output torque, including:

[0013] Set the upper limit of the generator's generating torque according to the generator's required speed and power output.

[0014] Optionally, obtain the required generator speed, including:

[0015] The required generator speed can be determined based on the required speed of the power take-off device, or by looking up a table based on the required power output.

[0016] Optionally, the range-extended hybrid system also includes a drive motor and a power battery, with the drive motor connected to the power battery via a drive motor controller;

[0017] Obtaining the electrical power from the generator for power extraction includes:

[0018] Obtain the current discharge power limit of the power battery and determine the power consumption of the drive motor based on throttle demand;

[0019] The power output of the generator to take power is determined based on the current discharge power limit and the power consumption.

[0020] Optionally, the actual engine torque can be determined based on the engine's required torque, including:

[0021] The engine's required torque is determined based on the SOC value of the power battery, and the actual engine torque is determined based on the required engine torque.

[0022] Optionally, the engine torque requirement can be corrected based on the actual generator torque and the actual engine torque, including:

[0023] If the actual torque of the generator is positive, the engine's required torque is adjusted based on the generator's required speed and the generator's actual speed, on the basis of the actual engine torque.

[0024] If the actual torque of the generator is negative, the engine's required torque is obtained by taking the generator's charging torque limit based on the engine's actual torque, and then correcting the engine's required torque according to the charging torque limit.

[0025] Optionally, the charging torque limit of the generator can be obtained, including:

[0026] The charging torque limit of the generator is determined based on the upper limit of the generator torque, the charging power limit of the power battery, and the power demand of the drive motor.

[0027] According to another aspect of the present invention, a power generation control device for a range extender is provided. The range-extended hybrid power system includes a range extender, the range extender including a generator and an engine, and the power generation control device for the range extender includes:

[0028] The torque value determination module is used to determine the generator speed control when the range extender is in operation, and to obtain the actual generator torque and set the upper limit value of the generator torque.

[0029] The generator control module is used to determine whether the engine should use torque control and to determine the actual torque of the engine based on the engine's required torque, so as to correct the engine's required torque based on the generator's actual torque and the engine's actual torque.

[0030] According to another aspect of the present invention, an engineering machinery vehicle is provided, the engineering machinery vehicle including a range-extended hybrid power system, the range-extended hybrid power system including a range extender, a power take-off device, a drive motor and a power battery, the range extender including a generator and an engine, the generator being connected to the power battery through a generator controller, the power take-off device being connected to the generator, and the drive motor being connected to the power battery through a drive motor controller.

[0031] Construction machinery vehicles also include:

[0032] At least one processor; and,

[0033] A memory that is communicatively connected to at least one processor; wherein,

[0034] The memory stores a computer program that can be executed by at least one processor, such that the at least one processor is able to execute the power generation control method of the range extender according to any embodiment of the present invention.

[0035] According to another aspect of the present invention, a computer-readable storage medium is provided, which stores computer instructions for causing a processor to execute and implement the power generation control method of a range extender according to any embodiment of the present invention.

[0036] The technical solution of this invention includes a range-extended hybrid system comprising a range extender, which includes a generator and an engine. The power generation control method of the range extender includes: when the range extender is in operation, determining that the generator uses speed control, acquiring the actual torque of the generator, and setting an upper limit value for the generator's torque, so as to precisely adjust the engine output through torque control, ensuring that the generator speed is in the optimal power generation range, avoiding voltage and frequency deviations caused by speed fluctuations, ensuring that the power generation quality meets the standards, satisfying the charging needs of the power battery, and providing stable power to the vehicle's auxiliary electrical equipment; furthermore, determining that the engine uses torque control, and determining the actual torque of the engine based on the engine's required torque, so as to correct the engine's required torque based on the actual torque of the generator and the actual torque of the engine, ensuring that the range extender provides uniform and reliable power to the rotary tillage component of the power take-off device while continuously and stably generating power, ensuring the continuity and consistency of the vehicle's rotary tillage operation.

[0037] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a flowchart of a power generation control method for a range extender provided according to an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of a range-extended hybrid power system provided according to an embodiment of the present invention;

[0041] Figure 3 This is a flowchart of a power generation control method for a range extender provided according to an embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of a power generation control device for a range extender according to an embodiment of the present invention;

[0043] Figure 5 This is a structural schematic diagram of an engineering machinery vehicle that implements the power generation control method of the range extender according to an embodiment of the present invention. Detailed Implementation

[0044] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0045] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0046] Figure 1 The present invention provides a flowchart of a power generation control method for a range extender. This embodiment is applicable to engineering machinery vehicles equipped with a range-extended hybrid power system. Considering that the power take-off comes directly from the range-extended hybrid power system, and to ensure the normal power generation of the range extender, the power generation control method of the range extender can be executed by the power generation control device of the range extender. The power generation control device of the range extender can be implemented in hardware and / or software. The power generation control device of the range extender can be configured in various types of engineering machinery vehicles.

[0047] In this embodiment, the construction machinery vehicle includes a range-extended hybrid power system. Figure 2 A schematic diagram of a range-extended hybrid power system is provided for embodiments of the present invention, such as... Figure 2As shown, the range-extended hybrid system includes a range extender 10, a power take-off (PTO) 8, a drive motor 6, and a power battery 5. The range extender 10 includes a generator 3 and an engine 1. The rotor of the generator 3 is connected to the crankshaft of the engine 1 via a coupling 2. The power from the engine 1 is directly and mechanically transmitted to the PTO 8. The generator 3 is connected to the power battery 5 via a generator controller 4. The PTO 8 is mechanically connected to the rotor of the generator 3. The drive motor 6 is connected to the power battery 5 via a drive motor controller 7. Therefore, when the PTO 8 needs to take power, the range extender 10 must ensure the power demand of the PTO 8 under operating conditions, while simultaneously generating electricity to power the drive motor 6 to maintain pure electric driving, and ensuring the SOC balance of the power battery 5. For example, if the construction machinery vehicle is an agricultural tractor, the PTO 8 can be a PTO (Power Take-off) power output shaft.

[0048] Based on the above, such as Figure 1 and Figure 2 As shown, the power generation control method of this range extender includes:

[0049] S110. When the range extender is in operation, determine that the generator uses speed control, obtain the actual generator torque, and set the upper limit of the generator torque.

[0050] The range extender's power generation control method is applied to construction machinery vehicles, which can be, but are not limited to, agricultural machinery vehicles, construction machinery vehicles, or road traffic vehicles. This embodiment does not impose any special restrictions on the specific types of construction machinery vehicles. In this embodiment, the range extender's power generation control method can be applied to agricultural machinery vehicles such as agricultural tractors, which are equipped with a range-extended hybrid power system, and the power take-off of their rotary tillage components comes directly from the range-extended hybrid power system.

[0051] When a range extender is in working condition, it means that the engine is started, driving the generator to generate electricity, charging the power battery or directly supplying power to the drive motor, and the engine does not directly drive the wheels, but only acts as a power generation unit. For example, for an agricultural tractor, when the range extender is in working condition, its engine (mostly a diesel engine) is started, driving the generator to generate electricity, charging the power battery or directly supplying power to the drive motor and hydraulic work motor.

[0052] Specifically, the operating state of the range extender varies depending on the scenario. When the battery charge is low, for example, below a set threshold (e.g., 30% to 40%), the range extender will automatically start generating electricity. Part of the electricity powers the drive motor and working mechanism, while the rest replenishes the battery, ensuring continuous operation of the agricultural tractor and preventing power outages. During high-load operations, such as deep plowing, heavy traction, or high-power output of the power take-off device, the range extender will start even if the battery has power, working in conjunction with the battery to meet high power demands and ensure the tractor's operating efficiency and traction. When the agricultural tractor is operating purely on range-extended power, if the battery is severely depleted or operating continuously for a long time, the range extender will continuously generate electricity to power the entire vehicle, maintaining normal driving and operation of the agricultural tractor. In this case, it relies entirely on fuel for energy. When the agricultural tractor is stopped or under low load, with a fully charged battery and low operating load, the range extender does not operate, and the agricultural tractor is driven purely on electricity, achieving zero-emission and low-noise operation, consistent with the experience of a pure electric agricultural tractor.

[0053] As those skilled in the art will know, in order to maintain a constant frequency of the generator output voltage and adjust the power output according to load changes, in this embodiment, when the range extender is in operation, the generator is determined to use speed control.

[0054] The actual torque of a generator is the reaction torque generated on the rotor shaft during the process of converting mechanical energy into electrical energy. For example, if the construction machinery vehicle is an agricultural tractor, when the agricultural tractor drives a generator through the PTO power output shaft to pump water or thresh grain in the field, the PTO power output shaft usually has a rated torque limit (e.g., 500 N·m). If the actual torque of the generator exceeds this value, the PTO power output shaft will be twisted off, or the connecting bolts will be sheared off. Therefore, by determining the actual torque of the generator, a safety protection mechanism is provided.

[0055] Based on the above, before setting the upper limit of the generator's generating torque, the required speed of the generator and the electrical power used by the generator to take off power are obtained. Specifically, the required speed of the generator is determined based on the required speed of the power take-off device, or the required speed of the generator is obtained by looking up a table based on the required generating power. Additionally, the current discharge power limit of the power battery is obtained, and the electrical power consumed by the drive motor is determined based on the throttle demand. The electrical power used by the generator to take off power is determined based on the current discharge power limit and the electrical power consumed. Further, the upper limit of the generator's generating torque is set based on the generator's required speed and electrical power.

[0056] S120. Determine that the engine uses torque control, and determine the actual engine torque based on the engine's required torque, so as to correct the engine's required torque based on the generator's actual torque and the engine's actual torque.

[0057] In this embodiment, the engine uses torque control where the ECU first calculates the required torque (such as the torque needed to overcome soil resistance during rotary tillage), and then automatically adjusts parameters such as throttle, fuel injection, and ignition to ensure precise and stable output torque, unaffected by external operating conditions. For example, if the construction machinery vehicle is an agricultural tractor, considering the rotary tillage scenario, when changes in soil resistance cause transient fluctuations in the torque taken by the rotary tillage components, torque control will quickly adjust the engine power output, supplementing torque when resistance increases and reducing torque when resistance decreases, always balancing load impacts and indirectly stabilizing the range extender speed, preventing sudden speed fluctuations from affecting the rotary tillage progress.

[0058] Specifically, the engine's required torque is determined based on the SOC value of the power battery, and the actual engine torque is determined based on the required engine torque.

[0059] The engine's required torque is calculated by the vehicle controller based on the current operating conditions. For example, if the range extender needs higher power generation (tractor under high load, vehicle accelerating rapidly), it will issue a higher torque demand command to the engine.

[0060] Furthermore, after receiving the engine's torque demand, the engine's electronic control system adjusts the throttle opening (gasoline engine) or fuel injection quantity (diesel engine) to change the engine's combustion intensity, thereby outputting the actual engine torque that matches the demand. It is known that the greater the actual engine torque, the stronger the engine's ability to drive the generator, and the higher the power output. In addition, the engine's actual torque cannot exceed its maximum torque limit. If the engine's torque demand exceeds its maximum torque limit, it will output at the maximum torque limit, possibly combined with battery power to meet the vehicle's power requirements.

[0061] For example, if the construction machinery vehicle is an agricultural tractor, when the agricultural tractor is engaged in deep plowing, the whole vehicle needs high power generation to drive the working motor and the drive motor. The vehicle controller will increase the torque demand of the engine, and the engine will output greater torque, driving the generator to generate electricity at full power, ensuring that the rotary tilling operation of the whole vehicle is uninterrupted.

[0062] Based on the above, if the actual torque of the generator is positive, the engine demand torque is adjusted based on the generator's required speed and actual speed. If the actual torque of the generator is negative, the engine demand torque is adjusted based on the generator's charging torque limit, and the engine demand torque is adjusted accordingly.

[0063] The charging torque limit of the generator is determined based on the upper limit of the generator torque, the charging power limit of the power battery, and the power demand of the drive motor.

[0064] The technical solution of this invention provides a range-extended hybrid power system including a range extender, which comprises a generator and an engine. The power generation control method of the range extender includes: when the range extender is in operation, determining that the generator uses speed control, acquiring the actual torque of the generator, and setting an upper limit value for the generator's torque; determining that the engine uses torque control, and determining the actual torque of the engine based on the engine's required torque, so as to correct the engine's required torque based on the actual torque of the generator and the actual torque of the engine. This invention solves the problems faced by existing agricultural tractor range-extended hybrid power systems when adapted for rotary tillage operations, such as large transient fluctuations in power take-off torque, poor speed stability of the range extender, and impacts on work quality and the reliability of the range-extended hybrid power system. It ensures that while the range extender continuously and stably generates power, it provides uniform and reliable power to the rotary tillage components of the power take-off device, guaranteeing the continuity and consistency of the entire vehicle's rotary tillage operation.

[0065] Based on the same inventive concept Figure 3 This is a flowchart illustrating a power generation control method for a range extender provided in an embodiment of the present invention. Based on the previous embodiments, this embodiment sets a torque limit during generator speed control and performs secondary correction during engine torque control to ensure normal power generation by the range extender while also meeting the power take-off requirements for rotary tillage operations, providing an optional implementation method. The range-extended hybrid power system includes a range extender, which comprises a generator and an engine, such as... Figure 3 As shown, the power generation control method of this range extender includes:

[0066] S210. When the range extender is in operation, determine that the generator uses speed control and obtain the actual generator torque.

[0067] In this embodiment, since the response rate of generator speed control is faster than that of engine speed control, which is beneficial to improving the efficiency of rotary tillage, when the range extender is in operation, it is determined that the generator adopts speed control, and at the same time, it is determined that the engine adopts torque control.

[0068] S220: Obtain the required speed of the generator and the electrical power used by the generator to take power, and set the upper limit of the generator's generating torque based on the required speed and electrical power.

[0069] As is known, the power take-off (PTO) unit (specifically referring to the rotary tillage component) is linked with the generator and range extender through a fixed transmission structure (such as a gear set or drive shaft). The speeds of the three are strictly proportionally related. Therefore, the required speed of the generator is not set independently, but is determined by reverse derivation based on the PTO unit's required speed and the transmission ratio. This is the key logic that balances the quality of rotary tillage and stable power generation. That is, the required speed of the generator is determined based on the PTO unit's required speed. The speeds of the PTO unit, the range extender, and the generator satisfy a fixed relationship of "speed = reference speed ÷ transmission ratio". Determining the generator speed based on the PTO unit's required speed ensures that the PTO unit receives constant power, avoids the decline in tillage quality caused by speed deviation, and meets the stringent stability requirements of rotary tillage.

[0070] The required speed of the power take-off (PTO) determines the target speed reference for the generator, while torque control is responsible for handling transient torque fluctuations caused by changes in soil resistance. By dynamically adjusting the engine power output, it maintains the generator speed stable near the reference value, ensuring it doesn't deviate from the optimal power generation range and that the PTO speed is not affected by load shocks. Conversely, if the generator speed is set independently of the PTO's required speed, the PTO speed will deviate from agronomic standards, either affecting tillage quality or causing abnormal generator speed due to transmission linkages, thus compromising power generation stability.

[0071] On the other hand, generators exhibit a "speed-power-efficiency" relationship. The maximum output power and power generation efficiency of a generator differ at different speeds, and it is necessary to match the optimal operating range of the range extender (engine) (the speed range corresponding to the optimal thermal efficiency). Therefore, calibration can be completed in advance through bench testing to generate a generator power-speed calibration table. The table clearly defines the optimal generator speed value corresponding to different power generation requirements. Then, the required generator speed can be obtained by looking up the table based on the required power generation.

[0072] Furthermore, the electrical power P_isg used by the generator to take power can be determined based on the current discharge power limit P_batt and the power consumption P_mt. Specifically, the electrical power P_isg = the current discharge power limit P_batt - the power consumption P_mt.

[0073] The current discharge power limit of the power battery is not a fixed value, but is dynamically calculated by collecting multi-dimensional parameters in real time through the battery management system (BMS) and combining preset algorithms and calibration data. It is adapted to the fluctuation of working conditions in multiple scenarios such as tractor rotary tillage, climbing, and transportation. This embodiment does not impose special restrictions on the specific value of the current discharge power limit or the method of obtaining it.

[0074] After obtaining the drive motor's drive torque requirement, it is necessary to combine the real-time collected drive motor speed and calculate the current required output power of the drive motor using the general engineering formula (power = torque × speed ÷ 9550). That is, the current required output power of the drive motor is the power consumption of the drive motor determined based on the throttle requirement.

[0075] Based on this, the upper limit of the generator's generating torque is set according to the generator's required speed and power. This means that the actual torque generated by the generator during speed control cannot exceed the upper limit of the generating torque. In other words, when the range extender is in operation, and the generator is determined to use speed control, the upper limit of the generator's generating torque needs to be set for the generator speed control. The purpose is to prevent the power battery from being over-discharged during generator speed control, and at the same time, to minimize the impact on the drive motor.

[0076] S230. Determine that the engine adopts torque control, and determine the engine's required torque based on the power battery's SOC value, and determine the engine's actual torque based on the engine's required torque.

[0077] As is known, determining the engine's required torque means determining that the engine uses torque control. The engine's required torque is set based on the power battery's SOC value. The lower the power battery's SOC value, the greater the engine's required torque. At the same time, the following steps S240 and S250 need to be corrected.

[0078] S240. If the actual torque of the generator is positive, the engine demand torque is adjusted based on the generator demand speed and the generator actual speed, according to the actual engine torque.

[0079] Specifically, when the generator's actual torque is positive, the engine's required torque is adjusted based on the difference between the generator's required speed and its actual speed. The larger the positive difference, the less capable the generator is of driving the engine, requiring the engine to continue producing power. The larger the correction coefficient, the more dynamically it adjusts the engine's torque compensation, and its value is positively correlated with the generator's driving capacity shortfall. For example, when soil resistance increases sharply during rotary tillage, the drive motor's power demand surges, or the generator, due to hardware limitations (not reaching its torque limit but with lagging power output), cannot meet the vehicle's energy demands, the range-extended hybrid system detects the difference between the generator's actual output torque and the required torque, and simultaneously increases the correction coefficient to correct the engine's required torque.

[0080] S250. If the actual torque of the generator is negative, the engine's required torque is obtained based on the actual torque of the engine, and the charging torque limit of the generator is obtained, and the engine's required torque is corrected according to the charging torque limit.

[0081] Among them, the charging torque limit of the generator refers to the maximum torque threshold that the generator in the range-extended hybrid system can output when charging the power battery. This value is determined by the hardware performance of the generator (such as structural strength and heat dissipation capacity) and is an insurmountable physical upper limit to avoid excessive torque leading to generator overheating and component damage, thus setting a maximum boundary for the charging torque.

[0082] In this embodiment, the charging torque limit of the generator is determined based on the upper limit of the generator torque, the charging power limit of the power battery, and the power demand of the drive motor. That is, it is determined by the coordinated constraint of the upper limit of the generator torque, the charging power limit of the power battery, and the power demand of the drive motor, which ensures both safe and efficient charging and does not affect the power output of the whole vehicle, thus adapting to the working conditions of the tractor.

[0083] Specifically, when the actual torque of the generator is negative, the engine's required torque is determined by taking the smaller of the upper limit of the generator torque and the limit of the charging torque, based on the actual torque of the engine. This process corrects the engine's required torque.

[0084] Based on the same inventive concept Figure 4 This is a schematic diagram of a power generation control device for a range extender provided in an embodiment of the present invention. The range-extended hybrid power system includes a range extender, which comprises a generator and an engine, such as... Figure 4 As shown, the power generation control device of the range extender includes:

[0085] The torque value determination module 310 is used to determine the generator speed control when the range extender is in operation, and to obtain the actual generator torque and set the upper limit value of the generator torque.

[0086] The generator control module 320 is used to determine that the engine adopts torque control and determine the actual torque of the engine based on the engine's required torque, so as to correct the engine's required torque based on the generator's actual torque and the engine's actual torque.

[0087] Optionally, the range-extended hybrid system also includes a power take-off unit connected to a generator;

[0088] The range extender's power generation control device also includes:

[0089] The power acquisition module is used to acquire the required speed of the generator and the electrical power used by the generator to take power.

[0090] Setting the upper limit of the generator's output torque, specifically used for:

[0091] Set the upper limit of the generator's generating torque according to the generator's required speed and power output.

[0092] Optionally, the required generator speed can be obtained, specifically for:

[0093] The required generator speed can be determined based on the required speed of the power take-off device, or by looking up a table based on the required power output.

[0094] Optionally, the range-extended hybrid system also includes a drive motor and a power battery, with the drive motor connected to the power battery via a drive motor controller;

[0095] Obtain the electrical power from the generator to take power, specifically for:

[0096] Obtain the current discharge power limit of the power battery and determine the power consumption of the drive motor based on throttle demand;

[0097] The power output of the generator to take power is determined based on the current discharge power limit and the power consumption.

[0098] Optionally, the actual engine torque can be determined based on the engine's required torque, specifically for:

[0099] The engine's required torque is determined based on the SOC value of the power battery, and the actual engine torque is determined based on the required engine torque.

[0100] Optionally, the engine torque requirement can be corrected based on the actual generator torque and the actual engine torque, specifically for:

[0101] If the actual torque of the generator is positive, the engine's required torque is adjusted based on the generator's required speed and the generator's actual speed, on the basis of the actual engine torque.

[0102] If the actual torque of the generator is negative, the engine's required torque is obtained by taking the generator's charging torque limit based on the engine's actual torque, and then correcting the engine's required torque according to the charging torque limit.

[0103] Optionally, the charging torque limit of the generator can be obtained, specifically for:

[0104] The charging torque limit of the generator is determined based on the upper limit of the generator torque, the charging power limit of the power battery, and the power demand of the drive motor.

[0105] The power generation control device for the range extender provided in the embodiments of the present invention can execute the power generation control method for the range extender provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the power generation control method for the range extender.

[0106] Based on the same inventive concept, an embodiment of the present invention provides an engineering machinery vehicle including a range-extended hybrid power system. The range-extended hybrid power system includes a range extender, a power take-off device, a drive motor, and a power battery. The range extender includes a generator and an engine. The generator is connected to the power battery through a generator controller, the power take-off device is connected to the generator, and the drive motor is connected to the power battery through a drive motor controller.

[0107] Furthermore, Figure 5 A schematic diagram of the structure of an engineering machinery vehicle 410 that can be used to implement an embodiment of the present invention is shown. For example... Figure 5 As shown, the construction machinery vehicle 410 also includes at least one processor 411 and a memory, such as a read-only memory (ROM 412) or a random access memory (RAM 413), communicatively connected to the at least one processor 411. The memory stores computer programs executable by the at least one processor. The processor 411 can perform various appropriate actions and processes based on the computer program stored in the read-only memory (ROM 412) or the computer program loaded from storage unit 418 into the random access memory (RAM 413). The RAM 413 can also store various programs and data required for the operation of the construction machinery vehicle 410. The processor 411, ROM 412, and RAM 413 are interconnected via a bus 414. An I / O (input / output) interface 415 is also connected to the bus 414.

[0108] Multiple components in the construction machinery vehicle 410 are connected to the I / O interface 415, including: an input unit 416, such as a keyboard, mouse, etc.; an output unit 417, such as various types of displays, speakers, etc.; a storage unit 418, such as a disk, optical disk, etc.; and a communication unit 419, such as a network card, modem, wireless transceiver, etc. The communication unit 419 allows the construction machinery vehicle 410 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0109] Processor 411 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 411 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 411 performs the various methods and processes described above, such as the power generation control method of a range extender.

[0110] In some embodiments, the range extender's power generation control method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 418. In some embodiments, part or all of the computer program may be loaded into and / or installed on the construction machinery vehicle 410 via ROM 412 and / or communication unit 419. When the computer program is loaded into RAM 413 and executed by processor 411, one or more steps of the range extender's power generation control method described above may be performed. Alternatively, in other embodiments, processor 411 may be configured to perform the range extender's power generation control method by any other suitable means (e.g., by means of firmware).

[0111] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0112] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0113] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0114] To provide user interaction, the systems and technologies described herein can be implemented on construction machinery vehicles, which include: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the construction machinery vehicle. Other types of devices can also be used to provide user interaction; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0115] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0116] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0117] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0118] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A power generation control method for a range extender, characterized in that, A range-extended hybrid power system includes a range extender, the range extender comprising a generator and an engine, and the power generation control method of the range extender includes: When the range extender is in operation, it is determined that the generator uses speed control, and the actual torque of the generator is obtained and the upper limit value of the generator torque is set. The engine is determined to use torque control, and the actual engine torque is determined based on the engine's required torque. The required engine torque is then corrected based on the actual generator torque and the actual engine torque. This correction includes: if the actual generator torque is positive, the required engine torque is corrected based on the generator's required speed and actual speed; if the actual generator torque is negative, the required engine torque is corrected based on the generator's charging torque limit, and the required engine torque is corrected based on the charging torque limit.

2. The power generation control method for the range extender according to claim 1, characterized in that, The range-extended hybrid power system also includes a power take-off device, which is connected to the generator. Before setting the upper limit value of the generator's generating torque, the following is also included: Obtain the required speed of the generator and the electrical power used by the generator to take power; Setting the upper limit value of the generator's output torque includes: The upper limit of the generator's generating torque is set according to the generator's required speed and the electrical power.

3. The power generation control method for the range extender according to claim 2, characterized in that, To obtain the required generator speed, including: The required generator speed can be determined based on the required speed of the power take-off device, or the required generator speed can be obtained by looking up a table based on the required power output.

4. The power generation control method for the range extender according to claim 2, characterized in that, The range-extended hybrid system also includes a drive motor and a power battery, wherein the drive motor is connected to the power battery through a drive motor controller; Obtaining the electrical power used by the generator to take power includes: Obtain the current discharge power limit of the power battery, and determine the power consumption of the drive motor based on the throttle demand; The power output used by the generator to draw power is determined based on the current discharge power limit and the power consumption.

5. The power generation control method for the range extender according to claim 1, characterized in that, Determining the actual engine torque based on the engine's required torque includes: The engine's required torque is determined based on the SOC value of the power battery, and the actual engine torque is determined based on the required engine torque.

6. The power generation control method for the range extender according to claim 1, characterized in that, Obtaining the charging torque limit of the generator includes: The charging torque limit of the generator is determined based on the upper limit of the generator torque, the charging power limit of the power battery, and the power requirement of the drive motor.

7. A power generation control device for a range extender, characterized in that, The range-extended hybrid system includes a range extender, the range extender including a generator and an engine, and the power generation control device of the range extender including: The torque value determination module is used to determine that the generator adopts speed control when the range extender is in working state, and to obtain the actual torque of the generator and set the upper limit value of the generator torque. The power generation control module is used to determine that the engine adopts torque control and determine the actual torque of the engine based on the engine's required torque, so as to correct the engine's required torque based on the actual torque of the generator and the actual torque of the engine. Specifically, the correction of the engine's required torque based on the actual torque of the generator and the actual torque of the engine is performed as follows: if the actual torque of the generator is positive, the engine's required torque is corrected based on the actual torque of the generator, according to the generator's required speed and the generator's actual speed; if the actual torque of the generator is negative, the engine's required torque is corrected based on the actual torque of the generator, obtaining the charging torque limit of the generator, and correcting the engine's required torque based on the charging torque limit.

8. An engineering machinery vehicle, characterized in that, The engineering machinery vehicle includes a range-extended hybrid power system, which includes a range extender, a power take-off unit, a drive motor, and a power battery. The range extender includes a generator and an engine. The generator is connected to the power battery through a generator controller. The power take-off unit is connected to the generator. The drive motor is connected to the power battery through a drive motor controller. The engineering machinery vehicles also include: At least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the power generation control method of the range extender according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the power generation control method for the range extender according to any one of claims 1-6.

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