Vehicle power control method and device, electronic equipment, storage medium and vehicle

Abstract

The application discloses a vehicle power control method and device, electronic equipment, storage medium and vehicle, and relates to the field of vehicle control, and comprises the following steps: based on the combination of the electrically driven trailer matching the tractor, the vehicle-mounted power source comprises an engine and a motor; based on the power output coupling of the engine and the motor, the output whole vehicle torque is coupled; the control state and the vehicle state information are acquired; according to the control state and the vehicle state information, the torque demand information is generated; the torque demand information comprises the torque demand information of the torque direction and the torque size of the driving or braking working condition; the whole vehicle torque capacity information is acquired; the whole vehicle torque capacity information comprises the torque capacity information of the engine and the motor; the information of the torque economy strategy based on the torque capacity of the engine and the motor is acquired; based on the torque capacity of the engine and the motor and the torque economy strategy, the whole vehicle torque output state is controlled to meet the torque demand.

Description

Technical Field

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

[0002] Economic efficiency is one of the most important performance indicators in the development of heavy-duty commercial vehicles. A heavy-duty commercial vehicle's fuel consumption, to a certain extent, determines its customer reputation and market performance. As traditional fuel-powered vehicle energy-saving technologies gradually reach their physical limits, major commercial vehicle and trailer manufacturers are conducting research on electric trailers to achieve energy-saving train goals. Currently, research on electric trailers is still in its infancy, primarily focusing on parameter matching and stability control of the trailer's electric drive system. Research on energy-saving control for electric trailers is relatively limited.

[0003] Patent Document 1 (New Energy Pure Electric Power-Assisted Trailer - CN212685247U) describes a new energy pure electric power-assisted trailer. Through the power control and drive system of the new energy pure electric power-assisted trailer and the tractor, it provides power assistance during starting, climbing, and accelerating, meeting practical requirements while being energy-efficient and environmentally friendly. However, the patent only describes the trailer's structure and hardware, without detailed control instructions, and fails to fully utilize the trailer's energy-saving effects.

[0004] Patent Document 2 (An Electric Drive System for a Freight Trailer - CN209241202U) describes an electric drive trailer system. The document focuses on the system hardware architecture, improving vehicle braking performance through energy recovery and auxiliary braking, but does not fully utilize the electric drive trailer's function in the driving state.

[0005] Reference 1 (Modeling, Simulation, and Parameter Matching Optimization of an Electric Semi-trailer Powertrain) conducted in-depth research on the rational optimization of the parameters of the semi-trailer's electric drive system through simulation and modeling of an electric trailer. The optimal configuration of trailer parameters was achieved through cost-recovery period calculation and simulation. However, the document only describes the trailer's energy management strategy as consisting of acceleration assistance, gear shift assistance, and brake torque calculation. This is relatively simplistic and fails to fully utilize the energy-saving effects of the synergy between the main vehicle and trailer.

[0006] Reference 2 (Research on Anti-Slip and Coordinated Torque Control for Distributed Electric Drive Semi-Trailer Trains) addresses the issue of instability associated with electric drive trailers at high speeds and examines coordinated anti-slip and torque control strategies for distributed electric drive semi-trailer trains. The document considers road adhesion, anti-slip, yaw moment control, and coordinated anti-slip and torque control to ensure safe driving of electric drive trailers. However, the primary energy-saving objective of matching electric drive trailers is not discussed in detail.

[0007] In summary, the current research on electric drive trailer system control is in its infancy, and the development and application of energy-saving control algorithms have not been fully considered, and there is a problem that the optimization effect needs to be improved.

[0008] Therefore, a vehicle power control solution is needed. Based on the combination type of electric-drive trailer and tractor, the power output coupling of the engine and motor, the output of the vehicle torque meets the torque demand while adopting a more economical control strategy to make the operation of the electric-drive trailer and tractor combination more cost-effective. Summary of the Invention

[0009] The purpose of the present invention is to provide a vehicle power control method, a vehicle power control device, an electronic device, a storage medium and a vehicle, which at least solves one of the technical problems of how to control the coupling state of the engine and motor power output, how to control the working mode jump, and how to select a more economical driving method.

[0010] The present invention provides the following solutions:

[0011] According to a first aspect of the present invention, a vehicle power control method is provided, the vehicle power control method comprising:

[0012] Based on the combination of an electric drive trailer and a tractor, the onboard power source includes an engine and a motor;

[0013] Based on the power output coupling of the engine and motor, the vehicle torque is output;

[0014] Obtain control status and vehicle status information;

[0015] Generate torque demand information based on control state and vehicle state information;

[0016] The torque demand information includes torque demand information of the torque direction and torque magnitude in the driving or braking condition;

[0017] Obtain vehicle torque capability information;

[0018] The vehicle's torque capacity information includes the torque capacity information of the engine and motor;

[0019] Obtain information on torque economy strategies based on the torque capabilities of the engine and electric motor;

[0020] Based on the torque capacity of the engine and motor and the torque economy strategy, the vehicle's torque output state is controlled to meet the torque demand.

[0021] Furthermore, the torque economy strategy includes:

[0022] Obtain vehicle torque map information;

[0023] The vehicle torque map information includes torque demand map information and torque capacity map information;

[0024] The torque demand map information includes a torque demand state based on a control state and a vehicle state;

[0025] The torque capability map information includes the range of torque capabilities of the engine and motor;

[0026] According to the torque capacity map information, the engine cost-effectiveness map information and the motor cost-effectiveness map information are obtained;

[0027] Setting a plurality of reference curves of engine power output standard states according to the engine cost-effectiveness map information and the motor cost-effectiveness map information;

[0028] Wherein, based on a plurality of reference curves of engine power output standard states, the switching of the engine power output state is controlled accordingly;

[0029] Match the motor's power output state based on the reference curve of the engine's power output standard state, the torque demand state, and the motor's torque capacity range;

[0030] According to the power output status of the matching motor, the power output of the engine and the motor are coupled to meet the torque demand.

[0031] Furthermore, the control of switching the engine power output state includes:

[0032] Based on the power output coupling between the engine and the motor, determine whether the variation range within the motor torque capacity covers the variation state of the torque demand;

[0033] If yes, then maintain the reference curve of the current engine power output standard state, and control the motor torque change state to track the torque demand change state;

[0034] If, not, then obtaining the torque demand of the current driving or braking condition and the corresponding torque direction and torque magnitude;

[0035] According to the current driving or braking working condition and the corresponding torque direction and torque magnitude torque requirements, select the reference curve jump of the engine power output standard state, and control the engine power output state switching accordingly;

[0036] According to the control engine power output state switching, based on the power output coupling of the engine and the motor, it is determined whether the change range within the motor torque capacity covers the change state of the torque demand;

[0037] If yes, then the motor torque change state is controlled to track the torque demand change state based on the reference curve of the current engine power output standard state;

[0038] If not, reselect the reference curve jump of the engine power output standard state, and control the engine power output state switch accordingly, or abandon the torque economy strategy within the preset timing period to ensure that the engine and motor power output coupling output vehicle torque meets the vehicle torque requirement.

[0039] Furthermore, generating torque demand information based on the control state and vehicle state information includes:

[0040] The control state information includes control intention information obtained based on the opening state of the accelerator pedal or brake pedal in the gear state;

[0041] Vehicle status information includes driving status information obtained based on road conditions, load, speed, energy storage and loss;

[0042] Control the driving state according to the control intention and generate information on the torque demand state;

[0043] Generate torque demand map information based on torque demand state information;

[0044] The torque demand map information includes a torque demand change curve.

[0045] Furthermore, it also includes:

[0046] Set the braking response rate and driving response rate according to the driving or braking conditions;

[0047] Among them, the braking response rate is higher than the driving response rate;

[0048] Since the braking response rate is higher than the driving response rate, under braking conditions, the motor torque control is coordinated to match the reference curve jump of the engine power output standard state;

[0049] Since the braking response rate is higher than the driving response rate, under non-braking conditions, the reference curve of the standard state of engine power output jumps to match the torque control of the motor.

[0050] Further, including:

[0051] The preset engine power output states include engine shutdown, engine idling, engine outputting low fuel consumption torque, engine reverse drag, engine outputting optimal fuel consumption torque, engine outputting maximum torque, and engine outputting required torque.

[0052] Among them, setting multiple reference curves for standard engine power output states includes setting reference curves for power output states corresponding to engine output of low fuel consumption torque, engine output of optimal fuel consumption torque, and engine output of maximum torque based on the torque economy strategy.

[0053] Further, including:

[0054] The preset motor power output states include the motor shutdown, the motor not working, the motor outputting the maximum generating torque, the motor outputting the auxiliary torque, and the motor outputting the maximum driving torque.

[0055] Among them, according to the torque demand and the current driving or braking conditions, the response control of the motor power output state and the control of the torque direction and magnitude are carried out;

[0056] The response control of the motor power output state and the control of the torque direction and magnitude include switching between the motor power output states.

[0057] Further, including:

[0058] The preset vehicle operating modes include parking charging mode, parking mode, brake power generation mode, braking mode, driving power generation mode, hybrid drive mode and engine drive mode;

[0059] The vehicle operating mode is selected or switched based on the torque direction and torque magnitude of the driving or braking conditions and the torque capacity of the engine and motor, in conjunction with the torque economy strategy.

[0060] Further, including:

[0061] The preset power output coupling states of the engine and the motor include the coupling state of the engine stopping and the motor stopping, the coupling state of the engine idling and the motor stopping, the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, the coupling state of the engine reverse drag and the motor outputting auxiliary torque, the coupling state of the engine reverse drag and the motor not working, the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, the coupling state of the engine outputting optimal fuel consumption torque and the motor outputting auxiliary torque, the coupling state of the engine outputting maximum torque and the motor outputting maximum driving torque, and the coupling state of the engine outputting required torque and the motor not working.

[0062] Further, including:

[0063] Match the power output coupling state of the engine and motor with the vehicle operating mode;

[0064] Among them, the parking charging mode corresponds to the coupled state of engine shutdown and motor shutdown;

[0065] Parking mode, corresponding to the coupled state of engine idling and motor shutdown;

[0066] Braking and power generation mode corresponds to the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, or the coupling state of the engine reverse drag and the motor outputting auxiliary torque;

[0067] Braking mode corresponds to the coupled state of engine reverse drag and motor inoperative;

[0068] Driving power generation mode corresponds to the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, or the coupling state of the engine outputting optimal fuel consumption torque and the motor outputting auxiliary torque;

[0069] Hybrid drive mode corresponds to a coupling state where the engine outputs low fuel consumption torque and the motor outputs maximum power generation torque, a coupling state where the engine outputs optimal fuel consumption torque and the motor outputs assist torque, or a coupling state where the engine outputs maximum torque and the motor outputs maximum driving torque;

[0070] The engine drive mode corresponds to the coupling state where the engine outputs the required torque and the motor is not working.

[0071] Further, including:

[0072] Based on downhill road conditions, select the braking power generation mode;

[0073] In the braking power generation mode, it includes:

[0074] Determine whether the motor's generating torque capacity covers the braking torque requirement;

[0075] If yes, the power coupling state of the engine and the motor is a coupling state in which the engine outputs low fuel consumption torque and the motor outputs maximum power generation torque;

[0076] If not, the power coupling state of the engine and the motor is a coupling state in which the engine reverses and the motor outputs auxiliary torque;

[0077] The auxiliary torque output by the motor includes a torque in the same direction as the maximum power generation torque output by the motor.

[0078] Further, including:

[0079] Based on smooth road conditions, select the driving power generation mode;

[0080] In driving power generation mode, it includes:

[0081] Determine whether the motor's generating torque capacity covers the braking torque requirement;

[0082] If yes, the power coupling state of the engine and the motor is a coupling state in which the engine outputs low fuel consumption torque and the motor outputs maximum power generation torque;

[0083] Determine whether the motor's driving torque capability meets the driving torque requirement;

[0084] If yes, then the power coupling state of the engine and the motor is a coupling state in which the engine outputs the optimal fuel consumption torque and the motor outputs the auxiliary torque;

[0085] The auxiliary torque output by the motor includes a torque in the same direction as the optimal fuel consumption torque output by the engine.

[0086] Further, including:

[0087] Based on the undulating mountain road conditions, select the hybrid drive mode;

[0088] In hybrid drive mode, it includes:

[0089] Determine whether the engine driving torque capacity coupled with the motor driving torque capacity covers the driving torque requirement;

[0090] If no, the power coupling state of the engine and the motor is a coupling state in which the engine outputs the maximum torque and the motor outputs the maximum driving torque;

[0091] If,yes, then determine whether the motor's generating torque capacity covers the driving torque requirement;

[0092] If the motor's generating torque capacity covers the driving torque requirement, the engine and motor power coupling state is a coupling state in which the engine outputs low fuel consumption torque and the motor outputs maximum generating torque;

[0093] Determine whether the motor's driving torque capability meets the driving torque requirement;

[0094] If yes, then the power coupling state of the engine and the motor is a coupling state in which the engine outputs the optimal fuel consumption torque and the motor outputs the auxiliary torque;

[0095] The auxiliary torque output by the motor includes a torque in the same direction as the optimal fuel consumption torque output by the engine.

[0096] Furthermore, it also includes:

[0097] According to the vehicle torque map information, obtain the vehicle operation cost map information;

[0098] The vehicle operating cost map includes the fitted vehicle cost target curve based on the energy storage cost curve, time cost curve, and loss cost curve;

[0099] Generate a vehicle cost curve by controlling the vehicle's torque output state to meet torque requirements;

[0100] Dynamically allocate the torque output state and energy consumption share of the engine and motor to control the vehicle cost curve to approach the vehicle cost target curve;

[0101] The energy storage cost includes the economic cost of oil and electricity storage and the risk cost of adding energy storage without a site ahead.

[0102] Loss costs include material costs and maintenance costs for battery degradation and mechanical losses;

[0103] Time cost includes the time cost of achieving preset task indicators based on the preset route planning.

[0104] According to a second aspect of the present invention, there is provided a vehicle power control device, the vehicle power control device comprising:

[0105] Based on the combination of an electric drive trailer and a tractor, the onboard power source includes an engine and a motor;

[0106] Based on the power output coupling of the engine and motor, the vehicle torque is output;

[0107] A status information acquisition module is used to obtain control status and vehicle status information;

[0108] A torque demand information module, configured to generate torque demand information based on control state and vehicle state information;

[0109] The torque demand information includes torque demand information of the torque direction and torque magnitude in the driving or braking condition;

[0110] Torque capacity information module, used to obtain vehicle torque capacity information;

[0111] The vehicle's torque capacity information includes the torque capacity information of the engine and motor;

[0112] a strategy information acquisition module, configured to acquire information on a torque economy strategy based on the torque capabilities of the engine and the motor;

[0113] The output state control module is used to control the vehicle's torque output state to meet torque requirements based on the torque capabilities of the engine and motor and the torque economy strategy.

[0114] According to a third aspect of the present invention, there is provided an electronic device comprising: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0115] The memory stores a computer program, which, when executed by the processor, enables the processor to execute the steps of the vehicle power control method.

[0116] According to a fourth aspect of the present invention, a computer-readable storage medium is provided, which stores a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the vehicle power control method.

[0117] According to a fifth aspect of the present invention, there is provided a vehicle comprising:

[0118] An electronic device for implementing the steps of the vehicle power control method;

[0119] a processor, the processor running a program, and executing the steps of the vehicle power control method based on data output from the electronic device when the program is running;

[0120] The storage medium is used to store a program, and when the program is running, the program executes the steps of the vehicle power control method for the data output from the electronic device.

[0121] Through the above solution, the following beneficial technical effects are achieved:

[0122] This application sets a reference curve to ensure that the engine operates in a cost-effective state as much as possible, reducing fuel consumption while meeting the vehicle's operating needs.

[0123] This application controls the coupling state of the engine and the motor, covers the torque demand, and dynamically controls the torque change of the motor so that the dynamic change of the torque demand causes as little change as possible in the engine output state.

[0124] This application sets a reference curve of the engine power output state, distributed in several relatively fixed output states, as a benchmark for the coupling between the engine and the motor, so that the fluctuations in motor control can cope with the fluctuations in torque demand, thereby reducing the difficulty of motor control.

[0125] This application realizes the control of driving state by satisfying the control intention, generates torque demand information, and makes the torque demand into executable demand data.

[0126] This application jumps to or out of the reference curve through the engine power output state to adapt to the drastic changes in torque demand to the maximum extent while ensuring optimal fuel economy.

[0127] This application controls the braking response rate to be higher than the driving response rate, leaving a more reasonable change space for vehicle mode jump, and responding to changes in torque demand is more suitable for actual driving needs.

[0128] This application forms a control strategy that comprehensively considers economic efficiency by fitting the energy storage cost curve, time cost curve and loss cost curve to the vehicle cost target curve, and comprehensively considering the vehicle operating costs including fuel consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0129] Figure 1 This is a flow chart of a vehicle power control method provided by one or more embodiments of the present invention.

[0130] Figure 2 It is a structural diagram of a vehicle power control device provided by one or more embodiments of the present invention.

[0131] Figure 3 It is a schematic diagram of fuel consumption economy provided by a specific embodiment of the present invention.

[0132] Figure 4 It is a schematic diagram of a vehicle operating mode provided by a specific embodiment of the present invention.

[0133] Figure 5 This is a structural block diagram of an electronic device according to a vehicle power control method provided by one or more embodiments of the present invention. DETAILED DESCRIPTION

[0134] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0135] Figure 1 This is a flow chart of a vehicle power control method provided by one or more embodiments of the present invention.

[0136] like Figure 1 The vehicle dynamics control method shown includes:

[0137] Based on the combination of an electric drive trailer and a tractor, the onboard power source includes an engine and a motor;

[0138] Based on the power output coupling of the engine and motor, the vehicle torque is output;

[0139] Step A1, obtaining control status and vehicle status information;

[0140] Step A2, generating torque demand information based on the control state and vehicle state information;

[0141] Step A3: The torque demand information includes torque demand information of the torque direction and torque magnitude in the driving or braking state;

[0142] Step A4, obtaining vehicle torque capability information;

[0143] Step A5: The vehicle torque capacity information includes the torque capacity information of the engine and the motor;

[0144] Step A6, obtaining information of a torque economy strategy based on the torque capabilities of the engine and the motor;

[0145] Step A7: Based on the torque capabilities of the engine and motor and the torque economy strategy, the vehicle torque output state is controlled to meet the torque demand.

[0146] Specifically, electric trailer and tractor combinations include tractors that are either fuel-powered or hybrid vehicles. Electric trailers include independently controlled trailers and trailers controlled by the tractor. Electric trailers can have independent batteries or share batteries with the tractor. Electric trailers include one or more electric motors driving the wheels. The power output coupling between the engine and motor includes states where only the engine or motor outputs power, and states where torque output is divided between the engine and motor. Control state includes the driver's control intent for vehicle speed as reflected by the accelerator or brake pedal position. Vehicle state includes the state of the vehicle and its surroundings that causes the driving or braking vehicle to change its speed under the same output torque, based on factors such as vehicle weight, load, slope, gravel, asphalt, icy, or flooded roads. Vehicle speed state can be obtained using speed meters and encoders, motor torque information can be obtained using current and voltage, and engine torque information can be obtained using engine gear position and speed. The system calculates the required torque for driving the vehicle based on the vehicle's state and surroundings, information about motor torque corresponding to current and voltage, information about engine torque corresponding to engine gear and speed, and historical data. The system then determines the driver's torque demand based on the calculated required torque, based on the accelerator or brake pedal position.

[0147] Of course, torque requirements vary and can be obtained in other ways.

[0148] The torque capacity of the engine and motor has a preset range interval corresponding to the model, power, etc. The range interval includes the torque capacity range of the engine and motor under short-term operation and long-term operation based on various working conditions.

[0149] In addition to responding to the vehicle's operating conditions and the driver's control intent, the vehicle's operating mode also corresponds to the coupling state of the engine and electric motor power output. This coupling state is set to achieve not only the driver's control intent but also other pre-set goals, such as reducing fuel consumption and overall vehicle operating costs. By switching vehicle operating modes, the driver's control instructions are fulfilled while simultaneously achieving the goals of reducing fuel consumption and overall vehicle operating costs.

[0150] According to the torque economy strategy, the engine and motor power output coupling state is set to meet torque requirements while reducing economic expenditures. For example, electricity consumption is exchanged for fuel savings to achieve comprehensive economy.

[0151] In this embodiment, the torque economy strategy includes:

[0152] Obtain vehicle torque map information;

[0153] The vehicle torque map information includes torque demand map information and torque capacity map information;

[0154] The torque demand map information includes a torque demand state based on a control state and a vehicle state;

[0155] The torque capability map information includes the range of torque capabilities of the engine and motor;

[0156] According to the torque capacity map information, the engine cost-effectiveness map information and the motor cost-effectiveness map information are obtained;

[0157] Setting a plurality of reference curves of engine power output standard states according to the engine cost-effectiveness map information and the motor cost-effectiveness map information;

[0158] Wherein, based on a plurality of reference curves of engine power output standard states, the switching of the engine power output state is controlled accordingly;

[0159] Match the motor's power output state based on the reference curve of the engine's power output standard state, the torque demand state, and the motor's torque capacity range;

[0160] According to the power output status of the matching motor, the power output of the engine and the motor are coupled to meet the torque demand.

[0161] Specifically, based on historical and experimental data, engine and motor cost-effectiveness maps are obtained, namely, reference curves for standard engine power output conditions. Because vehicles operate under various operating conditions and speeds, multiple reference curves are provided, distributed across varying torque output conditions. Controlling engine operation based on these reference curves for standard engine power output conditions can achieve optimal cost-effectiveness. For example, under the reference curve for optimal fuel-efficiency torque output, by controlling the motor's floating control, the vehicle can be kept economically efficient while completing transportation tasks at a high level. When the engine is under the reference curve for optimal fuel-efficiency torque output, torque demand may fluctuate. As torque demand fluctuates, the motor's output torque is controlled, for example, by outputting auxiliary torque to track the fluctuations in torque demand. This results in a coupled motor and engine output that meets torque demand.

[0162] In another specific embodiment, cost-efficiency map information is obtained from a database of engine / motor universal characteristics. This database includes characteristic data for fuel-powered tractors, electric tractors, hybrid tractors, electric trailers, and non-electric trailers, either individually or in combination. Economic strategies and operating condition analysis are then incorporated to generate cost-efficiency map information. The engine cost-efficiency map information includes fuel economy under specific operating conditions, control state curves for the engine's operating state, and data maps.

[0163] In this embodiment, controlling the switching of the engine power output state includes:

[0164] Based on the power output coupling between the engine and the motor, determine whether the variation range within the motor torque capacity covers the variation state of the torque demand;

[0165] If yes, then maintain the reference curve of the current engine power output standard state, and control the motor torque change state to track the torque demand change state;

[0166] If, not, then obtaining the torque demand of the current driving or braking condition and the corresponding torque direction and torque magnitude;

[0167] According to the current driving or braking working condition and the corresponding torque direction and torque magnitude torque requirements, select the reference curve jump of the engine power output standard state, and control the engine power output state switching accordingly;

[0168] According to the control engine power output state switching, based on the power output coupling of the engine and the motor, it is determined whether the change range within the motor torque capacity covers the change state of the torque demand;

[0169] If yes, then the motor torque change state is controlled to track the torque demand change state based on the reference curve of the current engine power output standard state;

[0170] If not, reselect the reference curve jump of the engine power output standard state, and control the engine power output state switch accordingly, or abandon the torque economy strategy within the preset timing period to ensure that the engine and motor power output coupling output vehicle torque meets the vehicle torque requirement.

[0171] Specifically, as the torque demand increases, maintaining the original engine parameter curve and using the motor to address the fluctuations in the torque demand exceeds the motor's torque output capacity. The engine must then adjust its original parameter curve so that the coupled output of the motor and engine can meet the fluctuations in the torque demand. Generally, the engine and motor remain coupled, switching control states synchronously, but the engine's response is slower than the motor's. Specifically, after issuing a command for the reference curve for the standard engine power output state, the actual engine power output state requires a certain delay before the output effect is achieved. The engine power output state can temporarily deviate from the reference curve for the standard state, achieving a smooth transition.

[0172] In this embodiment, the information for generating the torque demand based on the control state and vehicle state information includes:

[0173] The control state information includes control intention information obtained based on the opening state of the accelerator pedal or brake pedal in the gear state;

[0174] Vehicle status information includes driving status information obtained based on road conditions, load, speed, energy storage and loss;

[0175] Control the driving state according to the control intention and generate information on the torque demand state;

[0176] Generate torque demand map information based on torque demand state information;

[0177] The torque demand map information includes a torque demand change curve.

[0178] Specifically, the control intent information obtained based on the gear position and the opening state of the accelerator or brake pedal corresponds to the torque target requirement; the driving state information obtained based on the road conditions, load, speed, energy storage, and loss corresponds to the torque demand of the torque change slope. Based on this, a torque demand change curve is generated. In other words, achieving the torque target is subject to the vehicle's conditions, and the torque change slope must be used to ensure that the vehicle increases speed along a more economical curve to achieve the torque target. The driving torque change slope is generally smaller than the braking torque change slope. For example, braking is more deeply related to vehicle safety and requires a faster response, so the braking torque change slope is larger. Driving, on the other hand, is related to vehicle operating efficiency and can be slightly delayed in response. The driving torque change slope is smaller, such as in slow acceleration or slow deceleration.

[0179] In this embodiment, it also includes:

[0180] Set the braking response rate and driving response rate according to the driving or braking conditions;

[0181] Among them, the braking response rate is higher than the driving response rate;

[0182] Since the braking response rate is higher than the driving response rate, under braking conditions, the motor torque control is coordinated to match the reference curve jump of the engine power output standard state;

[0183] Since the braking response rate is higher than the driving response rate, under non-braking conditions, the reference curve of the standard state of engine power output jumps to match the torque control of the motor.

[0184] Specifically, due to the delay associated with engine shifting and speed changes, the motor's torque control responds quickly. Under braking conditions, the motor can quickly respond in terms of torque direction and magnitude. This, combined with the motor's torque control, matches the reference curve jump for the standard engine power output state, ensuring safe vehicle operation. Under non-braking conditions, utilizing and maintaining inertia does not excessively impact vehicle safety. This, combined with the reference curve jump for the standard engine power output state and the motor's torque control, ensures that the tractor's power is the primary driving source, with the electric trailer cooperating to compensate for the tractor's power output, resulting in a relatively smooth acceleration process.

[0185] In this embodiment, it includes:

[0186] The preset engine power output states include engine shutdown, engine idling, engine outputting low fuel consumption torque, engine reverse drag, engine outputting optimal fuel consumption torque, engine outputting maximum torque, and engine outputting required torque.

[0187] Among them, setting multiple reference curves for standard engine power output states includes setting reference curves for power output states corresponding to engine output of low fuel consumption torque, engine output of optimal fuel consumption torque, and engine output of maximum torque based on the torque economy strategy.

[0188] Specifically, vehicles need to cope with the needs of various working conditions and cannot pursue fuel economy under all working conditions. Only multiple reference curves of engine power output standard states are not enough to cover all torque requirements. Therefore, in addition to setting the reference curves of engine power output standard states corresponding to the power output states of engine output low fuel consumption torque, engine output optimal fuel consumption torque, and engine output maximum torque, other power output states such as engine shutdown, engine idling, and engine reverse drag are also included.

[0189] In this embodiment, it includes:

[0190] The preset motor power output states include the motor shutdown, the motor not working, the motor outputting the maximum generating torque, the motor outputting the auxiliary torque, and the motor outputting the maximum driving torque.

[0191] Among them, according to the torque demand and the current driving or braking conditions, the response control of the motor power output state and the control of the torque direction and magnitude are carried out;

[0192] The response control of the motor power output state and the control of the torque direction and magnitude include switching between the motor power output states.

[0193] Specifically, similarly, vehicles need to cope with the needs of various working conditions and cannot pursue fuel economy under all working conditions. Only the reference curves of multiple engine power output standard states are not enough to cover all torque requirements. Therefore, more motor power output states are set to correspond to actual operating needs.

[0194] For example, motor shutdown means the vehicle is completely parked in a parking space, exiting the driving state, and the motor brake is locked. Motor inactivity means the vehicle is at zero speed or coasting, but not exiting the driving state, so the motor brake does not need to be locked.

[0195] In this embodiment, it includes:

[0196] The preset vehicle operating modes include parking charging mode, parking mode, brake power generation mode, braking mode, driving power generation mode, hybrid drive mode and engine drive mode;

[0197] The vehicle operating mode is selected or switched based on the torque direction and torque magnitude of the driving or braking conditions and the torque capacity of the engine and motor, in conjunction with the torque economy strategy.

[0198] Specifically, in Parking Charge mode, the engine is turned off, the motor is locked, and the battery can be charged from an external charger. In Parking mode, torque demand is temporarily zero, the engine is idling, and the motor is inactive, such as when waiting at a traffic light. Braking Power Generation mode is ideal for long downhill descents. Braking mode is ideal for emergency stops. Driving Power Generation mode is ideal for relatively flat roads. Hybrid Drive mode is ideal for hilly and rolling terrain. Engine Drive mode is ideal for depleted batteries, requiring only the towing vehicle to meet torque demands.

[0199] In this embodiment, it includes:

[0200] The preset power output coupling states of the engine and the motor include the coupling state of the engine stopping and the motor stopping, the coupling state of the engine idling and the motor stopping, the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, the coupling state of the engine reverse drag and the motor outputting auxiliary torque, the coupling state of the engine reverse drag and the motor not working, the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, the coupling state of the engine outputting optimal fuel consumption torque and the motor outputting auxiliary torque, the coupling state of the engine outputting maximum torque and the motor outputting maximum driving torque, and the coupling state of the engine outputting required torque and the motor not working.

[0201] Specifically, by coupling the output states of the engine and motor, different torque output capacity ranges are formed to cope with various vehicle operating conditions.

[0202] In this embodiment, it includes:

[0203] Match the power output coupling state of the engine and motor with the vehicle operating mode;

[0204] Among them, the parking charging mode corresponds to the coupled state of engine shutdown and motor shutdown;

[0205] Parking mode, corresponding to the coupled state of engine idling and motor shutdown;

[0206] Braking and power generation mode corresponds to the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, or the coupling state of the engine reverse drag and the motor outputting auxiliary torque;

[0207] Braking mode corresponds to the coupled state of engine reverse drag and motor inoperative;

[0208] Driving power generation mode corresponds to the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, or the coupling state of the engine outputting optimal fuel consumption torque and the motor outputting auxiliary torque;

[0209] Hybrid drive mode corresponds to a coupling state where the engine outputs low fuel consumption torque and the motor outputs maximum power generation torque, a coupling state where the engine outputs optimal fuel consumption torque and the motor outputs assist torque, or a coupling state where the engine outputs maximum torque and the motor outputs maximum driving torque;

[0210] The engine drive mode corresponds to the coupling state where the engine outputs the required torque and the motor is not working.

[0211] Specifically, based on the vehicle's operating mode, different working conditions or different types of road sections are handled, the coupling status of the engine and motor outputs is matched, and by switching the operating mode, the engine and motor can reduce the amount of computational complexity of the coupled output.

[0212] It's important to note that the combination of an electric trailer and a tractor is different from a hybrid vehicle. The electric trailer and tractor can be separated and reassembled at any time. Therefore, the matching relationship between the electric trailer and tractor is not unique and fixed. Due to various constraints, such as load, power, center of gravity, and power, the optimal combination cannot be achieved. To maximize matching redundancy between the two, reduce the risk of computing power delays, and establish a relatively standardized drive control relationship, preset motor power output states, engine power output states, vehicle operating modes, and engine and motor power output coupling states are configured, and then matched to the engine and motor power output coupling states and vehicle operating modes. This pre-set strategy maximizes the matching of various electric trailer types with various tractor types to form combinations. Specifically, by leveraging the motor's faster response speed, computing power is focused on controlling the electric trailer's torque output to meet torque fluctuations. The engine consumes computing power using a relatively simplified reference curve based on multiple standard engine power output states, corresponding to the switching strategy for controlling engine power output states.

[0213] In addition to manual selection and switching of vehicle operating modes, the system can also use vehicle status information collected as first data to guide the current vehicle operating mode. It then collects control status information as second data to control the engine and motor power coupling state within this mode. If the controlled engine and motor power coupling state cannot meet power requirements, the system switches to a new vehicle operating mode and controls the engine and motor power coupling state based on the new vehicle operating mode.

[0214] The sources of vehicle status information include, but are not limited to, local vehicle sensors and historical data, as well as third-party service data, such as navigation services, weather forecast services, and forecast information fed back to the following vehicle based on advance knowledge from the preceding vehicle.

[0215] Jumping to a new vehicle operating mode includes, based on the first requirement of satisfying the torque demand, further checking whether the engine can operate on the second requirement of a preset reference curve. If the new vehicle operating mode includes satisfying the above-mentioned first and second requirements, then this operating mode is selected as the target operating mode for jumping. For example, based on the undulating mountain road conditions, the hybrid drive mode is selected. The undulating mountain road includes uphill and downhill sections, but if the downhill section is relatively long, the braking torque demand is more intense. For safety reasons, it should jump to the braking power generation mode, because the braking power generation mode includes the output state of the engine reverse drag and the motor outputting the maximum power generation torque, and has greater braking capacity redundancy. For example, the operating mode can be triggered to jump from the hybrid drive mode to the braking power generation mode based on the output state of the maximum power generation torque at a certain moment for too long.

[0216] In this embodiment, it includes:

[0217] Based on downhill road conditions, select the braking power generation mode;

[0218] In the braking power generation mode, it includes:

[0219] Determine whether the motor's generating torque capacity covers the braking torque requirement;

[0220] If yes, the power coupling state of the engine and the motor is a coupling state in which the engine outputs low fuel consumption torque and the motor outputs maximum power generation torque;

[0221] If not, the power coupling state of the engine and the motor is a coupling state in which the engine reverses and the motor outputs auxiliary torque;

[0222] The auxiliary torque output by the motor includes a torque in the same direction as the maximum power generation torque output by the motor.

[0223] Specifically, for downhill road conditions, the braking power generation mode is selected. On a relatively gentle slope, or when just entering a downhill slope, the motor outputs the maximum power generation torque, and most of the vehicle's kinetic energy is converted into electrical energy and stored in the battery. Since it is a downhill slope, the engine outputs low-fuel-consumption torque that is sufficient to drive on the downhill section. When on a relatively steep slope, or when the speed is high and a relatively urgent deceleration is required, or when the battery is fully charged and can no longer absorb more electrical energy, the engine downshifts and reverses, and the motor outputs auxiliary torque to assist deceleration or help start on the slope. The torque direction of the auxiliary torque output by the motor includes the braking direction and the driving direction. The torque direction of the auxiliary torque output by the motor is controlled according to the driver's stepping on the accelerator and brake pedals, and the torque size of the auxiliary torque output by the motor is controlled by the opening of the accelerator and brake pedals.

[0224] In this embodiment, it includes:

[0225] Based on smooth road conditions, select the driving power generation mode;

[0226] In driving power generation mode, it includes:

[0227] Determine whether the motor's generating torque capacity covers the braking torque requirement;

[0228] If yes, the power coupling state of the engine and the motor is a coupling state in which the engine outputs low fuel consumption torque and the motor outputs maximum power generation torque;

[0229] Determine whether the motor's driving torque capability meets the driving torque requirement;

[0230] If yes, then the power coupling state of the engine and the motor is a coupling state in which the engine outputs the optimal fuel consumption torque and the motor outputs the auxiliary torque;

[0231] The auxiliary torque output by the motor includes a torque in the same direction as the optimal fuel consumption torque output by the engine.

[0232] Specifically, on smooth roads, the driving power generation mode is selected. On smooth roads, both braking and driving torque are required, but are generally unaffected by slopes. When deceleration and braking are required, the coupling of the engine's low-fuel-consumption torque and the motor's maximum power generation torque is sufficient for braking. When acceleration is required, the coupling of the engine's optimal fuel-consumption torque and the motor's auxiliary torque is sufficient for driving. In the driving state, the direction of the motor's auxiliary torque is the same as the engine's output torque, and the magnitude of the motor's auxiliary torque fluctuates with the torque demand.

[0233] In this embodiment, it includes:

[0234] Based on the undulating mountain road conditions, select the hybrid drive mode;

[0235] In hybrid drive mode, it includes:

[0236] Determine whether the engine driving torque capacity coupled with the motor driving torque capacity covers the driving torque requirement;

[0237] If no, the power coupling state of the engine and the motor is a coupling state in which the engine outputs the maximum torque and the motor outputs the maximum driving torque;

[0238] If,yes, then determine whether the motor's generating torque capacity covers the driving torque requirement;

[0239] If the motor's generating torque capacity covers the driving torque requirement, the engine and motor power coupling state is a coupling state in which the engine outputs low fuel consumption torque and the motor outputs maximum generating torque;

[0240] Determine whether the motor's driving torque capability meets the driving torque requirement;

[0241] If yes, then the power coupling state of the engine and the motor is a coupling state in which the engine outputs the optimal fuel consumption torque and the motor outputs the auxiliary torque;

[0242] The auxiliary torque output by the motor includes a torque in the same direction as the optimal fuel consumption torque output by the engine.

[0243] Specifically, for mountain roads with bumpy road conditions, choose the hybrid drive mode.

[0244] When the engine's torque capacity coupled with the motor's torque capacity doesn't cover the required torque, creating a difficult climb, coupling the engine's maximum torque with the motor's maximum torque is the only option. Covering the required torque is equivalent to the engine's torque capacity coupled with the motor's torque capacity exceeding the required torque.

[0245] When leaving a more difficult climb, the motor drive or power generation torque capacity can once again cover the driving torque demand; based on the motor power generation torque capacity covering the driving torque demand, the engine outputs a coupling state of low fuel consumption torque and the motor outputs a coupling state of maximum power generation torque; based on the motor drive torque capacity covering the driving torque demand, the engine outputs a coupling state of optimal fuel consumption torque and the motor outputs an auxiliary torque.

[0246] In this embodiment, it also includes:

[0247] According to the vehicle torque map information, obtain the vehicle operation cost map information;

[0248] The vehicle operating cost map includes the fitted vehicle cost target curve based on the energy storage cost curve, time cost curve, and loss cost curve;

[0249] Generate a vehicle cost curve by controlling the vehicle's torque output state to meet torque requirements;

[0250] Dynamically allocate the torque output state and energy consumption share of the engine and motor to control the vehicle cost curve to approach the vehicle cost target curve;

[0251] The energy storage cost includes the economic cost of oil and electricity storage and the risk cost of adding energy storage without a site ahead.

[0252] Loss costs include material costs and maintenance costs for battery degradation and mechanical losses;

[0253] Time cost includes the time cost of achieving preset task indicators based on the preset route planning.

[0254] Specifically, given the current high fuel consumption costs, multiple reference curves for standard engine power output conditions can be established to ensure fuel savings. However, other factors may also contribute to increased vehicle operating costs. For example, in some regions or countries, fuel is relatively cheap, but the rapid response of the motor cannot be ignored. For example, rising lithium material prices can lead to price sensitivity to rapid battery loss. For example, increased vehicle wear and tear can increase maintenance costs. For example, time-sensitive transportation missions may outweigh fuel savings. Therefore, a target vehicle cost curve is fitted based on the energy storage cost curve, the time cost curve, and the loss cost curve. By controlling the vehicle's torque output to meet torque requirements, a vehicle cost curve is generated, representing the energy storage cost, time cost, and loss cost consumption when meeting torque requirements. By keeping the vehicle cost (operating cost) close to the target vehicle cost curve, comprehensive cost control is achieved. Increased proxy energy storage costs include the risk of not having a charging station or gas station nearby, and the economic costs of oil and electricity prices. Loss costs include material costs and maintenance costs such as rapid battery degradation due to excessive discharge and excessive engine wear due to high speed.

[0255] Figure 2 It is a structural diagram of a vehicle power control device provided by one or more embodiments of the present invention.

[0256] like Figure 2 The vehicle power control device shown includes: a state information acquisition module, a torque demand information module, a torque capacity information module, a strategy information acquisition module, and an output state control module;

[0257] Based on the combination of an electric drive trailer and a tractor, the onboard power source includes an engine and a motor;

[0258] Based on the power output coupling of the engine and motor, the vehicle torque is output;

[0259] A status information acquisition module is used to obtain control status and vehicle status information;

[0260] A torque demand information module, configured to generate torque demand information based on control state and vehicle state information;

[0261] The torque demand information includes torque demand information of the torque direction and torque magnitude in the driving or braking condition;

[0262] Torque capacity information module, used to obtain vehicle torque capacity information;

[0263] The vehicle's torque capacity information includes the torque capacity information of the engine and motor;

[0264] a strategy information acquisition module, configured to acquire information on a torque economy strategy based on the torque capabilities of the engine and the motor;

[0265] The output state control module is used to control the vehicle's torque output state to meet torque requirements based on the torque capabilities of the engine and motor and the torque economy strategy.

[0266] It is worth noting that although the present system / device only discloses a status information acquisition module, a torque demand information module, a torque capacity information module, a strategy information acquisition module, and an output status control module, it does not mean that the present device is limited to the above-mentioned basic functional modules. Rather, what the present invention wants to express is that, based on the above-mentioned basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with the existing technology to form an infinite number of embodiments or technical solutions. In other words, the present system / device is open rather than closed. Just because the present embodiment only discloses individual basic functional modules, it cannot be considered that the scope of protection of the claims of the present invention is limited to the above-mentioned basic functional modules.

[0267] In one specific embodiment, a method for controlling the engine and motor of a heavy-duty commercial vehicle paired with an electric trailer system based on the vehicle's required torque is disclosed. This method primarily addresses the problem of coupled control of the engine and motor in a heavy-duty commercial vehicle paired with an electric trailer system. Through coupled control of the engine and motor, the engine load point is shifted to a low-fuel-consumption range, and the motor load is dynamically adjusted, while ensuring the vehicle's required power. Ultimately, this method achieves fuel savings for the entire vehicle.

[0268] In this embodiment, the vehicle controller determines the working mode and the control requirements of the tractor engine and trailer motor according to the vehicle status and driver operation, and controls the corresponding components through the engine controller and trailer motor controller respectively.

[0269] The technical solution adopted in this embodiment can determine the power working mode of the electric trailer according to the vehicle status and driver operation, use the motor to participate in driving, driving power generation and braking energy recovery, and achieve engine load point transfer and braking energy recovery effects through effective engine and motor control strategies, such as Figure 3 As shown, it mainly includes the following steps:

[0270] S1, start;

[0271] S2. Determine whether the trailer driving conditions are met based on the system status. If so, proceed to S3.

[0272] S3: Determine the working mode based on the vehicle status signal and the driver's operation. The working modes are S4 to S10.

[0273] S4, the current working mode is parking charging mode;

[0274] S41, parking charging mode controls the engine and motor to stop, protecting the trailer from being affected by the charging cable connection;

[0275] S5, the current working mode is parking mode;

[0276] S51, parking mode controls the engine to idle and stops the motor;

[0277] S6, the current working mode is braking power generation mode;

[0278] S61, determining whether the required torque meets the maximum generating torque output of the motor, if so, executing S611; if not, executing S612;

[0279] S611: Control the engine to output low fuel consumption torque; control the motor to output maximum power generation torque;

[0280] S612: Control the engine to output reverse torque; control the motor to output assist torque;

[0281] S7, the current working mode is braking mode;

[0282] S71, in braking mode, controls the engine to reverse drag; controls the motor to not work;

[0283] S8, the current working mode is driving power generation mode;

[0284] S81, determine whether the required torque meets the maximum power generation torque output of the motor. If so, execute S811; if not, execute S812;

[0285] S811: Control the engine to output low fuel consumption torque; control the motor to output maximum power generation torque;

[0286] S812: Control the engine to output the optimal fuel consumption torque; control the motor to output the auxiliary torque;

[0287] S9, the current working mode is hybrid driving mode;

[0288] S91: Determine whether the required torque is less than the maximum driving torque of the motor plus the maximum output torque of the engine. If so, execute S911; if not, execute S912.

[0289] S911, determine whether the required torque meets the maximum driving torque output of the motor. If so, execute S9111; if not, execute S9112;

[0290] S9111: Control the engine to output low fuel consumption torque; control the motor to output maximum driving torque;

[0291] S9112: Control the engine to output the optimal fuel consumption torque; control the motor to output the auxiliary torque;

[0292] S912: Control the engine to output maximum torque; control the motor to output maximum driving torque;

[0293] S10, the current working mode is the engine driving mode;

[0294] S101, controlling the engine to output the required torque; controlling the motor to not operate;

[0295] S10, determine whether the working mode switching condition is met (not shown in the figure), if so, return to S1; if not, execute S11;

[0296] S11. End.

[0297] Through the above examples, experimental data were collected. Figure 4 Indicated in.

[0298] Figure 5 This is a structural block diagram of an electronic device according to a vehicle power control method provided by one or more embodiments of the present invention.

[0299] like Figure 5 As shown, the present application provides an electronic device, comprising: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus;

[0300] The memory stores a computer program, which, when executed by the processor, enables the processor to execute steps of a vehicle power control method.

[0301] The present application also provides a computer-readable storage medium storing a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of a vehicle power control method.

[0302] This application also provides a development platform, including:

[0303] An electronic device for implementing the steps of a vehicle power control method;

[0304] a processor that runs a program and, when the program is running, executes the steps of the vehicle power control method based on data output by the electronic device;

[0305] The storage medium is used to store a program, and when the program is running, the program executes the steps of the vehicle power control method for the data output from the electronic device.

[0306] The communication bus mentioned in the electronic device mentioned above may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus. This communication bus can be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is used in the figure, but this does not mean that there is only one bus or only one type of bus.

[0307] The electronic device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system. The hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory. The operating system can be any one or more computer operating systems that control electronic devices through processes, such as the Linux operating system, the Unix operating system, the Android operating system, the iOS operating system, or the Windows operating system. In the embodiments of the present invention, the electronic device can be a handheld device such as a smartphone or a tablet computer, or an electronic device such as a desktop computer or a portable computer, which is not particularly limited in the embodiments of the present invention.

[0308] The execution subject of the electronic device control in the embodiment of the present invention can be an electronic device, or a functional module in the electronic device that can call a program and execute the program. The electronic device can obtain the firmware corresponding to the storage medium. The firmware corresponding to the storage medium is provided by the supplier. The firmware corresponding to different storage media can be the same or different, and is not limited here. After the electronic device obtains the firmware corresponding to the storage medium, it can write the firmware corresponding to the storage medium into the storage medium, specifically, burn the firmware corresponding to the storage medium into the storage medium. The process of burning the firmware into the storage medium can be implemented using existing technology and will not be described in detail in the embodiment of the present invention.

[0309] The electronic device can also obtain a reset command corresponding to the storage medium. The reset command corresponding to the storage medium is provided by the supplier. The reset commands corresponding to different storage media can be the same or different, and are not limited here.

[0310] In this case, the storage medium of the electronic device is a storage medium in which the corresponding firmware is written. The electronic device can respond to the reset command corresponding to the storage medium in which the corresponding firmware is written, thereby resetting the storage medium in which the corresponding firmware is written according to the reset command corresponding to the storage medium. The process of resetting the storage medium according to the reset command can be implemented in the existing technology and will not be described in detail in the embodiments of the present invention.

[0311] For the convenience of description, the above devices are described as various units and modules according to their functions. Of course, when implementing this application, the functions of each unit and module can be implemented in the same or multiple software and / or hardware.

[0312] Those skilled in the art will understand that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those skilled in the art in the art to which the present invention pertains. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with those in the context of the prior art and, unless specifically defined, will not be interpreted in an idealized or overly formal sense.

[0313] For simplicity of description, the method embodiments are described as a series of actions. However, those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because certain steps can be performed in other orders or simultaneously according to the embodiments of the present invention. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions involved are not necessarily required by the embodiments of the present invention.

[0314] Through the description of the above embodiments, it can be seen that those skilled in the art can clearly understand that the present application can be implemented by means of software plus the necessary general hardware platform. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in various embodiments of the present application or certain parts of the embodiments.

[0315] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle power control method, characterized in that: The vehicle power control method includes: Based on the combination of an electric drive trailer and a tractor, the onboard power source includes an engine and a motor; Based on the power output coupling of the engine and motor, the vehicle torque is output; Obtain control status and vehicle status information; Generate torque demand information based on control state and vehicle state information; The torque demand information includes torque demand information of the torque direction and torque magnitude in the driving or braking condition; Obtain vehicle torque capability information; The vehicle's torque capacity information includes the torque capacity information of the engine and motor; Obtain information on torque economy strategies based on the torque capabilities of the engine and electric motor; Based on the torque capacity of the engine and motor and the torque economy strategy, the vehicle's torque output state is controlled to meet the torque demand; The torque economy strategy includes: Obtain vehicle torque map information; The vehicle torque map information includes torque demand map information and torque capacity map information; The torque demand map information includes a torque demand state based on a control state and a vehicle state; The torque capability map information includes the range of torque capabilities of the engine and motor; According to the torque capacity map information, the engine cost-effectiveness map information and the motor cost-effectiveness map information are obtained; Setting a plurality of reference curves of engine power output standard states according to the engine cost-effectiveness map information and the motor cost-effectiveness map information; Wherein, based on a plurality of reference curves of engine power output standard states, the switching of the engine power output state is controlled accordingly; Match the motor's power output state based on the reference curve of the engine's power output standard state, the torque demand state, and the motor's torque capacity range; According to the power output status of the matching motor, the power output of the engine and the motor are coupled to meet the torque demand.

2. The vehicle power control method according to claim 1, characterized in that: The control of switching of the engine power output state includes: Based on the power output coupling between the engine and the motor, determine whether the variation range within the motor torque capacity covers the variation state of the torque demand; If yes, then maintain the reference curve of the current engine power output standard state, and control the motor torque change state to track the torque demand change state; If, not, then obtaining the torque demand of the current driving or braking condition and the corresponding torque direction and torque magnitude; According to the current driving or braking working condition and the corresponding torque direction and torque magnitude torque requirements, select the reference curve jump of the engine power output standard state, and control the engine power output state switching accordingly; According to the control engine power output state switching, based on the power output coupling of the engine and the motor, it is determined whether the change range within the motor torque capacity covers the change state of the torque demand; If yes, then the motor torque change state is controlled to track the torque demand change state based on the reference curve of the current engine power output standard state; If not, reselect the reference curve jump of the engine power output standard state, and control the engine power output state switch accordingly, or abandon the torque economy strategy within the preset timing period to ensure that the engine and motor power output coupling output vehicle torque meets the vehicle torque requirement.

3. The vehicle power control method according to claim 2, characterized in that: The information of generating torque demand according to the control state and vehicle state information includes: The control state information includes control intention information obtained based on the opening state of the accelerator pedal or brake pedal in the gear state; Vehicle status information includes driving status information obtained based on road conditions, load, speed, energy storage and loss; Control the driving state according to the control intention and generate information on the torque demand state; Generate torque demand map information based on torque demand state information; The torque demand map information includes a torque demand change curve.

4. The vehicle power control method according to claim 3, characterized in that: Also includes: Set the braking response rate and driving response rate according to the driving or braking conditions; Among them, the braking response rate is higher than the driving response rate; Since the braking response rate is higher than the driving response rate, under braking conditions, the motor torque control is coordinated to match the reference curve jump of the engine power output standard state; Since the braking response rate is higher than the driving response rate, under non-braking conditions, the reference curve of the standard state of engine power output jumps to match the torque control of the motor.

5. The vehicle power control method according to claim 4, characterized in that: include: The preset engine power output states include engine shutdown, engine idling, engine outputting low fuel consumption torque, engine reverse drag, engine outputting optimal fuel consumption torque, engine outputting maximum torque, and engine outputting required torque. Among them, setting multiple reference curves for standard engine power output states includes setting reference curves for power output states corresponding to engine output of low fuel consumption torque, engine output of optimal fuel consumption torque, and engine output of maximum torque based on the torque economy strategy.

6. The vehicle power control method according to claim 5, characterized in that: include: The preset motor power output states include the motor shutdown, the motor not working, the motor outputting the maximum generating torque, the motor outputting the auxiliary torque, and the motor outputting the maximum driving torque. Among them, according to the torque demand and the current driving or braking conditions, the response control of the motor power output state and the control of the torque direction and magnitude are carried out; The response control of the motor power output state and the control of the torque direction and magnitude include switching between the motor power output states.

7. The vehicle power control method according to claim 6, characterized in that: include: The preset vehicle operating modes include parking charging mode, parking mode, brake power generation mode, braking mode, driving power generation mode, hybrid drive mode and engine drive mode; The vehicle operating mode is selected or switched based on the torque direction and torque magnitude of the driving or braking conditions and the torque capacity of the engine and motor, in conjunction with the torque economy strategy.

8. The vehicle power control method according to claim 7, characterized in that: include: The preset power output coupling states of the engine and the motor include the coupling state of the engine stopping and the motor stopping, the coupling state of the engine idling and the motor stopping, the coupling state of the engine reverse drag and the motor outputting auxiliary torque, the coupling state of the engine reverse drag and the motor not working, the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, the coupling state of the engine outputting optimal fuel consumption torque and the motor outputting auxiliary torque, the coupling state of the engine outputting maximum torque and the motor outputting maximum driving torque, and the coupling state of the engine outputting required torque and the motor not working.

9. The vehicle power control method according to claim 8, characterized in that: include: Match the power output coupling state of the engine and motor with the vehicle operating mode; Among them, the parking charging mode corresponds to the coupled state of engine shutdown and motor shutdown; Parking mode, corresponding to the coupled state of engine idling and motor shutdown; Braking and power generation mode corresponds to the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, or the coupling state of the engine reverse drag and the motor outputting auxiliary torque; Braking mode corresponds to the coupled state of engine reverse drag and motor inoperative; Driving power generation mode corresponds to the coupling state of the engine outputting low fuel consumption torque and the motor outputting maximum power generation torque, or the coupling state of the engine outputting optimal fuel consumption torque and the motor outputting auxiliary torque; Hybrid drive mode corresponds to a coupling state where the engine outputs low fuel consumption torque and the motor outputs maximum power generation torque, a coupling state where the engine outputs optimal fuel consumption torque and the motor outputs assist torque, or a coupling state where the engine outputs maximum torque and the motor outputs maximum driving torque; The engine drive mode corresponds to the coupling state where the engine outputs the required torque and the motor is not working.

10. The vehicle power control method according to claim 9, characterized in that: include: Based on downhill road conditions, select the braking power generation mode; In the braking power generation mode, it includes: Determine whether the motor's generating torque capacity covers the braking torque requirement; If yes, the power coupling state of the engine and the motor is a coupling state in which the engine outputs low fuel consumption torque and the motor outputs maximum power generation torque; If not, the power coupling state of the engine and the motor is a coupling state in which the engine reverses and the motor outputs auxiliary torque; The auxiliary torque output by the motor includes a torque in the same direction as the maximum power generation torque output by the motor.

11. The vehicle power control method according to claim 10, characterized in that: include: Based on smooth road conditions, select the driving power generation mode; In driving power generation mode, it includes: Determine whether the motor's generating torque capacity covers the braking torque requirement; If yes, the power coupling state of the engine and the motor is a coupling state in which the engine outputs low fuel consumption torque and the motor outputs maximum power generation torque; Determine whether the motor's driving torque capability meets the driving torque requirement; If yes, then the power coupling state of the engine and the motor is a coupling state in which the engine outputs the optimal fuel consumption torque and the motor outputs the auxiliary torque; The auxiliary torque output by the motor includes a torque in the same direction as the optimal fuel consumption torque output by the engine.

12. The vehicle power control method according to claim 11, characterized in that: include: Based on the undulating mountain road conditions, select the hybrid drive mode; In hybrid drive mode, it includes: Determine whether the engine driving torque capacity coupled with the motor driving torque capacity covers the driving torque requirement; If no, the power coupling state of the engine and the motor is a coupling state in which the engine outputs the maximum torque and the motor outputs the maximum driving torque; If,yes, then determine whether the motor's generating torque capacity covers the driving torque requirement; If the motor's generating torque capacity covers the driving torque requirement, the engine and motor power coupling state is a coupling state in which the engine outputs low fuel consumption torque and the motor outputs maximum generating torque; Determine whether the motor's driving torque capability meets the driving torque requirement; If yes, then the power coupling state of the engine and the motor is a coupling state in which the engine outputs the optimal fuel consumption torque and the motor outputs the auxiliary torque; The auxiliary torque output by the motor includes a torque in the same direction as the optimal fuel consumption torque output by the engine.

13. The vehicle power control method according to any one of claims 1 to 12, characterized in that: Also includes: According to the vehicle torque map information, obtain the vehicle operation cost map information; The vehicle operating cost map includes the fitted vehicle cost target curve based on the energy storage cost curve, time cost curve, and loss cost curve; Generate a vehicle cost curve by controlling the vehicle's torque output state to meet torque requirements; Dynamically allocate the torque output state and energy consumption share of the engine and motor to control the vehicle cost curve to approach the vehicle cost target curve; The energy storage cost includes the economic cost of oil and electricity storage and the risk cost of adding energy storage without a site ahead. Loss costs include material costs and maintenance costs for battery degradation and mechanical losses; Time cost includes the time cost of achieving preset task indicators based on the preset route planning.

14. A vehicle power control device, characterized in that: The vehicle power control device comprises: Based on the combination of an electric drive trailer and a tractor, the onboard power source includes an engine and a motor; Based on the power output coupling of the engine and motor, the vehicle torque is output; A status information acquisition module is used to obtain control status and vehicle status information; A torque demand information module, configured to generate torque demand information based on control state and vehicle state information; The torque demand information includes torque demand information of the torque direction and torque magnitude in the driving or braking condition; Torque capacity information module, used to obtain vehicle torque capacity information; The vehicle's torque capacity information includes the torque capacity information of the engine and motor; a strategy information acquisition module, configured to acquire information on a torque economy strategy based on the torque capabilities of the engine and the motor; The output state control module is used to control the vehicle's torque output state to meet torque requirements based on the torque capabilities of the engine and motor and the torque economy strategy; The torque economy strategy includes: Obtain vehicle torque map information; The vehicle torque map information includes torque demand map information and torque capacity map information; The torque demand map information includes a torque demand state based on a control state and a vehicle state; The torque capability map information includes the range of torque capabilities of the engine and motor; According to the torque capacity map information, the engine cost-effectiveness map information and the motor cost-effectiveness map information are obtained; Setting a plurality of reference curves of engine power output standard states according to the engine cost-effectiveness map information and the motor cost-effectiveness map information; Wherein, based on a plurality of reference curves of engine power output standard states, the switching of the engine power output state is controlled accordingly; Match the motor's power output state based on the reference curve of the engine's power output standard state, the torque demand state, and the motor's torque capacity range; According to the power output status of the matching motor, the power output of the engine and the motor are coupled to meet the torque demand.

15. An electronic device, characterized in that: include: A processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; The memory stores a computer program, which, when executed by the processor, causes the processor to execute the steps of the vehicle power control method according to any one of claims 1 to 13.

16. A computer-readable storage medium, characterized in that A computer program executable by an electronic device is stored, and when the computer program is run on the electronic device, the electronic device executes the steps of the vehicle power control method according to any one of claims 1 to 13.

17. A vehicle, characterized in that: include: An electronic device for implementing the steps of the vehicle power control method according to any one of claims 1 to 13; a processor, wherein the processor runs a program, and when the program runs, the steps of the vehicle power control method according to any one of claims 1 to 13 are executed based on data output from the electronic device; A storage medium for storing a program, wherein when the program is run, the program executes the steps of the vehicle power control method according to any one of claims 1 to 13 for data output from an electronic device.

Images