A vehicle comprehensive fuel consumption calculation method, device, system and computer equipment

Abstract

The technical scheme of the vehicle comprehensive fuel consumption calculation method, device, system and computer equipment provided by the embodiment of the application comprises: a driver module, a vehicle controller, a vehicle module, a thermal management module, a thermal management control module and a computer device; the method comprises: the computer device acquires a working mode of the vehicle; the engine output power is determined according to the working mode; the comprehensive fuel consumption of the vehicle in the power feeding mode is calculated according to the engine output power and the acquired engine fuel consumption rate, engine fuel density, driving time and driving distance. The calculation precision of the energy consumption of the new energy vehicle can be improved, and the energy saving and emission reduction measures can be implemented.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicles, and in particular to a method, apparatus, system and computer equipment for calculating comprehensive fuel consumption of vehicles. Background Technology

[0002] New energy vehicles have a more complex structure than traditional vehicles, and their performance is greatly affected by environmental factors such as temperature. Traditional test bench verification has an error of 2% to 4%, which is relatively large. This limits the verification of energy consumption for the optimization of subsystems in new energy vehicles and cannot provide reliable data support.

[0003] Therefore, the accuracy of calculating the energy consumption of new energy vehicles is relatively low, which to some extent hinders the implementation of energy conservation and emission reduction measures. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a method, apparatus, system and computer equipment for calculating comprehensive fuel consumption of vehicles, which can improve the calculation accuracy of energy consumption of new energy vehicles and realize the implementation of energy conservation and emission reduction measures.

[0005] In a first aspect, embodiments of the present invention provide a method for calculating the comprehensive fuel consumption of a vehicle, the method comprising:

[0006] Obtain the operating mode of the vehicle;

[0007] The engine output power is determined according to the operating mode;

[0008] The combined fuel consumption of the vehicle in power-off mode is calculated based on the engine output power, the obtained engine fuel consumption rate, engine fuel density, driving time, and driving distance.

[0009] Optionally, determining the engine output power based on the operating mode includes:

[0010] The working mode is hybrid charging, and the battery power consumption, engine output power efficiency loss ratio, and battery output power efficiency loss ratio are obtained.

[0011] The first product is obtained by multiplying the battery output power efficiency loss ratio by the battery power consumption.

[0012] The engine output power is obtained by dividing the sum of the product of the vehicle's required power and the first product by the engine output power efficiency loss ratio.

[0013] Optionally, determining the engine output power based on the operating mode includes:

[0014] The operating mode is hybrid mode discharge, and the battery power consumption, engine output power efficiency loss ratio, and battery output power efficiency loss ratio are obtained.

[0015] The first product is obtained by multiplying the battery output power efficiency loss ratio by the battery power consumption.

[0016] The engine output power is obtained by dividing the difference between the vehicle's required power and the first product by the engine output power efficiency loss ratio.

[0017] Optionally, determining the engine output power based on the operating mode includes:

[0018] The operating mode is a hybrid mode with no charging and no discharging, and the engine output power efficiency loss ratio is obtained.

[0019] The engine output power is obtained by dividing the total vehicle power requirement by the engine output power efficiency loss ratio.

[0020] Optionally, the method further includes:

[0021] Obtain the vehicle speed and overall vehicle resistance under the current operating conditions;

[0022] The required power of the vehicle is obtained based on the vehicle's driving resistance and the vehicle speed.

[0023] Optionally, determining the engine output power based on the operating mode includes:

[0024] The operating mode is pure electric mode, and the engine output power is 0.

[0025] Optionally, calculating the vehicle's overall fuel consumption in depleted battery mode based on the engine output power and the obtained engine fuel consumption rate, engine fuel density, driving time, and driving distance includes:

[0026] The engine fuel consumption is obtained by dividing the product of the engine fuel consumption rate and the engine output power by a first value.

[0027] Calculate the integral of the quotient of the engine fuel consumption divided by the second value over the driving time;

[0028] Divide the integral result by the product of the engine fuel density, driving distance and the third value, and then multiply by the fourth value to obtain the vehicle's overall fuel consumption in the battery depletion mode.

[0029] On the other hand, embodiments of the present invention provide a vehicle comprehensive fuel consumption calculation device, the device comprising:

[0030] The acquisition module is used to acquire the operating mode of the vehicle;

[0031] The processing module is used to determine the engine output power according to the operating mode; and to calculate the vehicle's overall fuel consumption in the power depletion mode based on the engine output power and the obtained engine fuel consumption rate, engine fuel density, driving time and driving distance.

[0032] On the other hand, embodiments of the present invention provide a vehicle comprehensive fuel consumption calculation system, the system comprising:

[0033] Driver module, vehicle controller, vehicle module, thermal management module, thermal management control module, and computer equipment;

[0034] The vehicle module is used to send the actual vehicle speed to the driver module;

[0035] The driver module is used to perform PID adjustment based on the current working conditions and the actual vehicle speed to obtain a first signal, the first signal being an accelerator pedal signal or a brake pedal signal, and to send the first information to the vehicle controller and the thermal management control module.

[0036] The vehicle controller is used to send the engine speed and torque, and the motor speed and torque to the vehicle module according to the first signal;

[0037] The thermal management control module is used to send air conditioner compressor speed, water pump speed and PTC start signal to the thermal management module according to the first signal;

[0038] The computer device is used to acquire the vehicle's operating mode; determine the engine output power based on the operating mode; and calculate the vehicle's overall fuel consumption in the power depletion mode based on the engine output power and the acquired engine fuel consumption rate, engine fuel density, driving time, and driving distance.

[0039] On the other hand, embodiments of the present invention provide a storage medium including a stored program, wherein the program controls the device where the storage medium is located to execute the above-described method when it is running.

[0040] On the other hand, embodiments of the present invention provide a computer device including a memory and a processor. The memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, wherein the program instructions, when loaded and executed by the processor, implement the steps of the above-described method.

[0041] The technical solution of the vehicle comprehensive fuel consumption calculation method, device, system, and computer equipment provided in this invention includes: acquiring the vehicle's operating mode; determining the engine output power based on the operating mode; and calculating the vehicle's comprehensive fuel consumption in a depleted power mode based on the engine output power and the acquired engine fuel consumption rate, engine fuel density, driving time, and driving distance. This can improve the accuracy of energy consumption calculation for new energy vehicles and facilitate the implementation of energy conservation and emission reduction measures. Attached Figure Description

[0042] Figure 1 This is a schematic diagram illustrating the process of building a vehicle comprehensive fuel consumption calculation system and calculating the vehicle's comprehensive fuel consumption in an embodiment of the present invention;

[0043] Figure 2 This is a schematic diagram of a vehicle comprehensive fuel consumption calculation system provided in an embodiment of the present invention;

[0044] Figure 3 This is a schematic diagram illustrating the PID control principle in an embodiment of the present invention;

[0045] Figure 4 This is a schematic diagram illustrating the switching between different working modes in an embodiment of the present invention;

[0046] Figure 5 This is a schematic diagram illustrating the principle of the thermal management control module in an embodiment of the present invention;

[0047] Figure 6 This is a circuit diagram of the thermal management module in an embodiment of the present invention;

[0048] Figure 7 This is a schematic diagram of the integrated functional modules in an embodiment of the present invention;

[0049] Figure 8 A graph for WLTC operating conditions;

[0050] Figure 9 A flowchart of a method for calculating comprehensive fuel consumption of a vehicle provided in an embodiment of the present invention;

[0051] Figure 10 A flowchart for determining engine output power based on operating mode is provided as an embodiment of the present invention;

[0052] Figure 11 Another flowchart for determining engine output power based on operating mode provided in an embodiment of the present invention;

[0053] Figure 12 Another flowchart for determining engine output power based on operating mode provided in an embodiment of the present invention;

[0054] Figure 13A flowchart for calculating the comprehensive fuel consumption of a vehicle in a power depletion mode based on engine output power, obtained engine fuel consumption rate, engine fuel density, driving time and driving distance, is provided for an embodiment of the present invention.

[0055] Figure 14 This is a schematic diagram of the structure of a vehicle comprehensive fuel consumption calculation device provided in an embodiment of the present invention;

[0056] Figure 15 This is a schematic diagram of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0057] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0058] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0059] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0060] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0061] The structure of new energy vehicles is more complex than that of traditional vehicles, and their performance is greatly affected by environmental factors such as temperature. Traditional test bench verification has an error rate of 2% to 4%, which is relatively large and limits the verification of energy consumption for subsystem optimization in new energy vehicles, failing to provide reliable data support. Therefore, the accuracy of calculating the energy consumption of new energy vehicles is relatively low, hindering the implementation of energy conservation and emission reduction measures to a certain extent. In response, the accuracy of vehicle energy consumption calculation and modularization requirements need to be further improved.

[0062] Based on the above-mentioned technical problems, this invention proposes a vehicle comprehensive fuel consumption calculation system, which can improve the calculation accuracy of energy consumption of new energy vehicles and promote the implementation of energy conservation and emission reduction measures.

[0063] Figure 1This is a schematic diagram illustrating the process of building a vehicle comprehensive fuel consumption calculation system and calculating the vehicle's comprehensive fuel consumption in an embodiment of the present invention. Figure 2 This is a schematic diagram of a vehicle comprehensive fuel consumption calculation system provided in an embodiment of the present invention.

[0064] (a) Establishing functional modules

[0065] like Figure 1 As shown, the functional modules of the vehicle comprehensive fuel consumption calculation system are first established. For example... Figure 2 As shown, the functional modules in the vehicle integrated fuel consumption calculation system 100 include: driver module 101, vehicle controller 102, vehicle module 103, thermal management module 104, and thermal management controller 105. The signal input and output between the driver module 101, vehicle controller 102, vehicle module 103, thermal management module 104, and thermal management controller 105 are transmitted via ports 1-4 using a CAN bus 106. The specific connection method is as follows: Figure 2 As shown. The CAN bus 106 mainly transmits the input and output signals of all functional modules in real time to realize the vehicle's actions.

[0066] In this embodiment of the invention, the driver module 101 is used to calculate the vehicle's driving resistance under the current operating conditions.

[0067] Among them, the overall vehicle driving resistance The calculation of (unit: N) is shown in formula (1):

[0068] (1)

[0069] In the formula, The coefficient of the zeroth term of the overall vehicle drag coefficient, The coefficient of the first term of the overall vehicle drag coefficient. This is the coefficient of the quadratic term of the vehicle drag coefficient. For the whole vehicle under operating conditions The target vehicle speed (unit: km / h) is given by mass, and the vehicle mass (unit: kg) is given by mass. For the whole vehicle in Acceleration at time (unit: ).in, , , The drag coefficient of the vehicle is obtained through testing according to GB / T 12536.

[0070] In this embodiment of the invention, the vehicle module 103 is used to send the actual vehicle speed to the driver module 101.

[0071] The vehicle architecture features a P1+P3 series-parallel plug-in hybrid system, which consists of an engine, two electric motors, a dual-motor controller, a coupler, a power battery, and a low-voltage battery. The dual-motor controller can simultaneously control both motors to generate electricity or drive the vehicle; the coupler controls whether the engine engages via an electromagnetic clutch (at high speeds, the clutch closes, and the engine directly drives the wheels).

[0072] In this embodiment of the invention, the driver module 101 is further configured to perform PID adjustment based on the current operating conditions (relationship between vehicle speed and time) and the actual vehicle speed to obtain a first signal, which is either an accelerator pedal signal or a brake pedal signal, and transmit the first signal to the CAN bus. The CAN bus sends the first signal to the vehicle controller 102 and the thermal management control module 105.

[0073] Figure 3 This is a schematic diagram illustrating the PID control principle in an embodiment of the present invention, as shown below. Figure 3 As shown, the input expectation X is the vehicle speed. When the vehicle acceleration is ≥0, the actual output Y of the PID controller is the accelerator pedal opening signal. When the vehicle acceleration is <0, the actual output Y of the PID controller is the brake pedal opening signal.

[0074] In this embodiment of the invention, the PID controller is calculated as shown in formula (2):

[0075] (2)

[0076] In the formula, It is the control output (output of the PID controller). It is the error (the difference between the set value and the actual value). , , These are the actual parameters of the proportional, integral, and differential gains, respectively. When =0.1, =0.01, When the value is 0, it is closer to the measured data.

[0077] In this embodiment of the invention, the vehicle controller 102 is mainly used for mode switching, power distribution, and driver control, enabling the output of engine torque requests, engine start / stop, generator torque, drive motor torque, and clutch open / close signals to the vehicle module 103. The vehicle controller 102 includes a plug-in hybrid mode switching module for switching between different operating modes.

[0078] Figure 4 This is a schematic diagram illustrating the switching between different working modes in an embodiment of the present invention, such as... Figure 4As shown, there are four operating modes: shutdown mode, pure electric mode, parallel mode, and series mode. Among them, parallel mode and series mode are hybrid modes.

[0079] In this embodiment of the invention, the vehicle's operating mode may also include the vehicle's charging and discharging state.

[0080] In this embodiment of the invention, the vehicle controller 102 is used to send the engine speed and torque, and the motor speed and torque to the vehicle module 103 according to the first signal.

[0081] In some possible embodiments, the vehicle controller 102 is used to complete the vehicle mode switching, engine start / stop, clutch opening / closing, power distribution and other operations according to the first signal, and then output the engine speed and torque, the motor speed and torque to the vehicle module 103.

[0082] In this embodiment of the invention, the thermal management control module 105 is used to send the air conditioner compressor speed, water pump speed and PTC start signal to the thermal management module 104 according to the first signal.

[0083] In some possible embodiments, the thermal management control module 105 is used to send air conditioner compressor speed, water pump speed and PTC start signal to the thermal management module 104 after completing the air conditioner on / off, PTC on / off and other operations according to the first signal.

[0084] Figure 5 This is a schematic diagram illustrating the principle of the thermal management control module in an embodiment of the present invention, such as... Figure 5 As shown, the thermal management control module can acquire ambient temperature sensor temperature, compressor suction temperature, battery inlet water temperature, battery outlet water temperature, radiator outlet water temperature, internal heat exchanger inlet temperature, and external heat exchanger inlet temperature via the CAN bus.

[0085] Figure 6 This is a circuit diagram of the thermal management module in an embodiment of the present invention, such as... Figure 6 As shown, the thermal management module mainly consists of an air conditioning module, a low-temperature circuit, and a high-temperature circuit.

[0086] (ii) Integrated functional modules

[0087] The vehicle integrated fuel consumption calculation system 100 also includes: computer equipment ( Figure 2 (Computer equipment is not shown). The computer equipment is connected to the driver module 101, vehicle controller 102, vehicle module 103, thermal management module 104, and thermal management controller 105 via CAN bus 106, and therefore can obtain parameters from each module through CAN bus 106.

[0088] Based on the functional modules of the vehicle integrated fuel consumption calculation system established above, the above functional modules are integrated using a relevant software platform (which can be installed in computer equipment). Figure 7 This is a schematic diagram of the integrated functional modules in an embodiment of the present invention, such as... Figure 7 As shown, the integrated vehicle fuel consumption calculation system includes a control model, a CAN bus, and vehicle, driver, and thermal management models. The control model is the control model side, containing a thermal management control module, a vehicle control module, and S-functions. The vehicle, driver, and thermal management models belong to the physical model side, containing a driver module, a vehicle module, a thermal management module, and control strategy inputs and outputs. For the physical model side, the CAN bus is automatically connected; for the control model side, CAN bus calibration variables are automatically identified.

[0089] like Figure 7 As shown, the signals transmitted between the control model and the vehicle, driver, and thermal management models via the CAN bus include, but are not limited to, SOC signal, vehicle speed signal, engine speed signal, required braking torque signal, required driving torque signal, required power signal, motor speed signal, motor torque signal, water pump speed signal, clutch engagement signal, engine start signal, engine load signal, engine speed signal, engine torque signal, thermostat opening signal, compressor speed signal, vehicle operating mode signal, and signals for calling compiler-generated S-functions, etc.

[0090] The integrated vehicle fuel consumption calculation system is not limited by actual prototype manufacturing, real-world road scenarios, or the accuracy of bench equipment. It only requires input of the required calibration conditions, vehicle and component parameters, and calibration parameters to simulate the entire process of vehicle operation under different conditions and calculate energy losses during this process. It simulates the energy consumption level of the vehicle under high and low temperature environments and realistic control strategies. This enables accurate prediction and virtual calibration of vehicle energy consumption, shortening the product development cycle by more than 10%.

[0091] (III) Solving the calculation

[0092] In this embodiment of the invention, a computer device is used to acquire the vehicle's operating mode, determine the engine output power based on the operating mode, and calculate the vehicle's comprehensive fuel consumption in the power depletion mode based on the engine output power, the acquired engine fuel consumption rate, engine fuel density, driving time, and driving distance.

[0093] The calculation mainly focuses on the overall fuel consumption under the power supply mode.

[0094] First, select the test conditions and input them into the computer. The test conditions should be selected according to GB / T 19753, for example, selecting the World Light Vehicle Test Cycle (WLTC) condition. Figure 8This is a graph of the WLTC test cycle, which is mainly used to evaluate a vehicle's fuel economy and emissions performance.

[0095] Secondly, the vehicle driving resistance calculated by the driver module according to formula (1) is obtained. The required power of the whole vehicle is calculated according to formula (3). (Unit: kW):

[0096] (3)

[0097] Next, using the aforementioned vehicle integrated fuel consumption calculation system, the engine's fuel consumption rate FC (unit: g / kWh) is simulated and calculated.

[0098] Then, the vehicle's operating mode is obtained, and the engine output power is determined based on the operating mode.

[0099] In some possible embodiments, the operating mode is hybrid charging, and the battery power consumption is obtained. Engine output power efficiency loss ratio (Take a value of 0-1) Battery output power efficiency loss ratio (Take 0-1); Calculate the engine output power according to formula (4). :

[0100] (4)

[0101] In some possible embodiments, the operating mode is hybrid mode discharge, and the power consumed by the battery is obtained. Engine output power efficiency loss ratio (Take a value of 0-1) Battery output power efficiency loss ratio (Take 0-1); Calculate the engine output power according to formula (5). :

[0102] (5)

[0103] therefore, and The allocation depends on the power allocation strategy in hybrid mode.

[0104] In some possible embodiments, the operating mode is a hybrid mode with neither charging nor discharging, and the engine output power efficiency loss ratio is obtained. (Take 0-1); Calculate the engine output power according to formula (6). :

[0105] (6)

[0106] In some possible embodiments, the operating mode is a pure electric mode. .

[0107] Finally, based on engine output power Engine fuel consumption rate (FC) and engine fuel density The combined fuel consumption of the vehicle in the depleted battery mode is calculated using the following parameters: (unit: g / ml), driving time t (unit: s), and driving distance L (unit: km).

[0108] For example, calculate the combined fuel consumption E (unit: L / 100km) of the vehicle in the power depletion mode according to formulas (7)-(8):

[0109] (7)

[0110] (8)

[0111] And it meets the correction standard c≤0.005, calculated according to Appendix A of National Standard 19753-2021.

[0112] In the formula, M represents the engine fuel consumption (unit: g / h).

[0113] This invention provides a method for calculating the comprehensive fuel consumption of vehicles, which can improve the accuracy of energy consumption calculation for new energy vehicles and enable the implementation of energy conservation and emission reduction measures.

[0114] Figure 9 A flowchart of a method for calculating comprehensive fuel consumption of a vehicle provided in an embodiment of the present invention is shown below. Figure 9 As shown, the method includes:

[0115] Step 201: Obtain the vehicle's operating mode.

[0116] In this embodiment of the invention, each step can be performed by a computer device.

[0117] For example, the vehicle's operating modes include: shutdown mode, pure electric mode, parallel mode or series mode, and charging / discharging state. Among them, parallel mode and series mode belong to hybrid modes.

[0118] Step 202: Determine the engine output power according to the working mode.

[0119] In some possible embodiments, the operating mode is hybrid charging, such as... Figure 10 As shown, step 202 includes:

[0120] Step S11: Obtain the battery power consumption, engine output power efficiency loss ratio, and battery output power efficiency loss ratio.

[0121] In this embodiment of the invention, the working mode is hybrid charging, and the engine output power is calculated according to the above formula (4). Therefore, it is necessary to obtain the battery power consumption. Engine output power efficiency loss ratio Battery output power efficiency loss ratio .

[0122] Step S12: Multiply the battery output power efficiency loss ratio by the battery power consumption to obtain the first product.

[0123] In this step, according to formula (4), the battery output power efficiency loss ratio is... With battery power consumption Multiply to get the first product .

[0124] Step S13: Divide the sum of the vehicle power demand and the first product by the engine output power efficiency loss ratio to obtain the engine output power.

[0125] In this step, according to formula (4), the required power of the whole vehicle is... with the first product The sum divided by the engine output power efficiency loss ratio Obtain engine output power .

[0126] In some possible embodiments, the operating mode is hybrid mode discharge, such as... Figure 11 As shown, step 202 includes:

[0127] Step S21: Obtain the battery power consumption, engine output power efficiency loss ratio, and battery output power efficiency loss ratio.

[0128] In this embodiment of the invention, the operating mode is hybrid mode discharge, and the engine output power is calculated according to the above formula (5). It is necessary to obtain the battery power consumption. Engine output power efficiency loss ratio Battery output power efficiency loss ratio .

[0129] Step S22: Multiply the battery output power efficiency loss ratio by the battery power consumption to obtain the first product.

[0130] In this step, according to formula (5), the battery output power efficiency loss ratio is... With battery power consumption Multiply to get the first product .

[0131] Step S23: Divide the difference between the vehicle's required power and the first product by the engine output power efficiency loss ratio to obtain the engine output power.

[0132] In this step, according to formula (5), the required power of the whole vehicle is... Subtract the first product The difference divided by the engine output power efficiency loss ratio Obtain engine output power .

[0133] In some possible embodiments, the operating mode is a hybrid mode with neither charging nor discharging, such as... Figure 12 As shown, step 202 includes:

[0134] Step S31: Obtain the engine output power efficiency loss ratio.

[0135] In this embodiment of the invention, the operating mode is a hybrid mode with no charging or discharging, and the engine output power is calculated according to the above formula (6). It is necessary to obtain the engine output power efficiency loss ratio. .

[0136] Step S32: Divide the required power of the whole vehicle by the engine output power efficiency loss ratio to obtain the engine output power.

[0137] In this step, according to formula (6), the required power of the whole vehicle is... Divided by the engine output power efficiency loss ratio Obtain engine output power .

[0138] In this embodiment of the invention, before determining the engine output power, the vehicle speed under the current operating conditions is also obtained. and overall vehicle driving resistance Based on the overall vehicle's driving resistance Speed Obtain the required power of the whole vehicle For the specific calculation process, please refer to formula (3) above.

[0139] In some possible embodiments, the operating mode is pure electric mode, and the engine output power is 0.

[0140] Step 203: Calculate the vehicle's overall fuel consumption in battery depletion mode based on the engine output power, the obtained engine fuel consumption rate, engine fuel density, driving time, and driving distance.

[0141] In some possible embodiments, such as Figure 13 As shown, step 203 includes:

[0142] Step S41: Obtain the engine fuel consumption by dividing the product of the engine fuel consumption rate and the engine output power by the first value.

[0143] In this embodiment of the invention, the comprehensive fuel consumption E of the vehicle in the power-off mode can be calculated according to the above formulas (7)-(8). According to formula (7), it can be seen that the engine fuel consumption rate FC and the engine output power are first calculated by... The product of these values ​​divided by the first value yields the engine fuel consumption M. The first value is 9550.

[0144] Step S42: Calculate the integral of the quotient of engine fuel consumption divided by the second value over the driving time.

[0145] In this embodiment of the invention, after calculating the engine fuel consumption M, according to formula (8), the integral of the quotient of the engine fuel consumption M divided by the second value over the driving time is first calculated. The second value is 3600.

[0146] Step S43: Divide the integral result by the product of engine fuel density, driving distance and the third value, and then multiply by the fourth value to obtain the vehicle's combined fuel consumption in battery depletion mode.

[0147] In this embodiment of the invention, according to formula (8), the integral result is divided by the product of engine fuel density σ, driving distance L and the third value, the third value being 1000; then multiplied by the fourth value to obtain the comprehensive fuel consumption E of the vehicle in the power depletion mode, the fourth value being 100.

[0148] This invention proposes an energy consumption calculation method for plug-in hybrid electric vehicles that integrates the whole vehicle, vehicle control, thermal management control, and thermal management system, and performs modular processing of the energy consumption calculation method.

[0149] This invention proposes a method for calculating energy consumption in the loop for high-precision modular control strategies of plug-in hybrid electric vehicles. With this method, the simulation accuracy of the subsystem is ≤0.5% and the simulation accuracy of the whole vehicle energy consumption is ≤1%, which is far superior to the accuracy of traditional bench verification of 2-4%.

[0150] The embodiments of the present invention rely on a high-precision simulation model to quickly and efficiently verify and accurately evaluate the vehicle energy consumption after the coupling of key technologies of each subsystem, and quickly separate the impact of different systems on the vehicle energy consumption.

[0151] This invention proposes an integrated energy consumption algorithm that couples multiple disciplines, including the vehicle (engine), power battery (electric), thermal management (thermal and liquid), and control strategy (control). It establishes an energy consumption model that integrates the vehicle and thermal management control strategy in the loop, and establishes a method to automatically determine the balance point and output the energy consumption results under each mode.

[0152] The present invention provides a technical solution for calculating the comprehensive fuel consumption of a vehicle. The method includes: acquiring the vehicle's operating mode; determining the engine output power based on the operating mode; and calculating the vehicle's comprehensive fuel consumption in a depleted power mode based on the engine output power, the acquired engine fuel consumption rate, engine fuel density, driving time, and driving distance. This method can improve the accuracy of energy consumption calculation for new energy vehicles and facilitate the implementation of energy conservation and emission reduction measures.

[0153] Figure 14 This is a schematic diagram of the structure of a vehicle comprehensive fuel consumption calculation device provided in an embodiment of the present invention, as shown below. Figure 14 As shown, the device includes:

[0154] Module 31 is used to acquire the vehicle's operating mode;

[0155] The processing module 32 is used to determine the engine output power according to the working mode; and to calculate the vehicle's comprehensive fuel consumption in the power depletion mode based on the engine output power and the obtained engine fuel consumption rate, engine fuel density, driving time and driving distance.

[0156] In some possible embodiments, the operating mode is hybrid charging mode. The acquisition module 31 is also used to acquire the battery power consumption, the engine output power efficiency loss ratio, and the battery output power efficiency loss ratio. The processing module 32 is specifically used to multiply the battery output power efficiency loss ratio by the battery power consumption to obtain a first product. The sum of the vehicle demand power and the first product is divided by the engine output power efficiency loss ratio to obtain the engine output power.

[0157] In some possible embodiments, the operating mode is hybrid mode discharge, and the acquisition module 31 is also used to acquire the battery power consumption, the engine output power efficiency loss ratio, and the battery output power efficiency loss ratio; the processing module 32 is specifically used to multiply the battery output power efficiency loss ratio and the battery power consumption to obtain a first product;

[0158] The engine output power is obtained by dividing the difference between the vehicle's required power and the first product by the engine output power efficiency loss ratio.

[0159] In some possible embodiments, the operating mode is a hybrid mode with no charging and no discharging. The acquisition module 31 is also used to acquire the engine output power efficiency loss ratio. The processing module 32 is specifically used to divide the vehicle's required power by the engine output power efficiency loss ratio to obtain the engine output power.

[0160] In some possible embodiments, the acquisition module 31 is further configured to acquire the vehicle speed and the overall vehicle driving resistance under the current operating conditions; the processing module 32 is further configured to obtain the required power of the vehicle based on the overall vehicle driving resistance and the vehicle speed.

[0161] In some possible embodiments, the operating mode is pure electric mode, and the engine output power is 0.

[0162] In some possible embodiments, the processing module 32 is specifically used to obtain the engine fuel consumption by dividing the product of the engine fuel consumption rate and the engine output power by a first value; calculate the integral result of the quotient of the engine fuel consumption divided by a second value over driving time; divide the integral result by the product of the engine fuel density, driving distance and a third value, and then multiply by a fourth value to obtain the vehicle's overall fuel consumption in the power depletion mode.

[0163] The technical solution provided in this invention involves obtaining the vehicle's operating mode; determining the engine output power based on the operating mode; and calculating the vehicle's comprehensive fuel consumption in a depleted battery mode based on the engine output power, the obtained engine fuel consumption rate, engine fuel density, driving time, and driving distance. This improves the accuracy of energy consumption calculations for new energy vehicles and facilitates the implementation of energy conservation and emission reduction measures.

[0164] This application provides a storage medium that includes a stored program, wherein the program controls the device where the storage medium is located to execute the above-described method when it is running.

[0165] This application provides a computer device including a memory and a processor. The memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions. When the program instructions are loaded and executed by the processor, they implement the steps of the above-described method.

[0166] Figure 15 This application provides a schematic diagram of the structure of a computer device, as shown in the embodiment of the present application. Figure 15 As shown, the computer device 20 includes a processor 21, a memory 22, and a computer program 23 stored in the memory 22 and executable on the processor 21. When the computer program 23 is executed by the processor 21, it implements the energy management method in the embodiment. To avoid repetition, it will not be described in detail here.

[0167] Computer device 20 includes, but is not limited to, processor 21 and memory 22. Those skilled in the art will understand that... Figure 15 This is merely an example of computer device 20 and does not constitute a limitation on computer device 20. It may include more or fewer components than shown, or combine certain components, or different components. For example, computer device 20 may also include input / output devices, network access devices, buses, etc.

[0168] The processor 21 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0169] The memory 22 can be an internal storage unit of the computer device 20, such as a hard disk or RAM of the computer device 20. The memory 22 can also be an external storage device of the computer device 20, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the computer device 20. Furthermore, the memory 22 can include both internal and external storage units of the computer device 20. The memory 22 is used to store computer programs and other programs and data required by the computer device 20. The memory 22 can also be used to temporarily store data that has been output or will be output.

[0170] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0171] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between apparatuses or units through some interfaces, and may be electrical, mechanical, or other forms.

[0172] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0173] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in a combination of hardware and software functional units.

[0174] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0175] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A vehicle integrated fuel consumption calculation method characterized by, The method comprises: acquiring a working mode of the vehicle; determining engine output power according to the working mode; calculating comprehensive fuel consumption of the vehicle in a feeding mode according to the engine output power and acquired engine fuel consumption rate, engine fuel density, driving time and driving distance; the determining of the engine output power according to the working mode comprises: the working mode is charging in a hybrid mode, acquiring battery consumption power, engine output power efficiency loss ratio, battery output power efficiency loss ratio; multiplying the battery output power efficiency loss ratio by the battery consumption power to obtain a first product; dividing a sum of the first product and whole vehicle demand power by the engine output power efficiency loss ratio to obtain the engine output power.

2. The method of claim 1, wherein, the determining of the engine output power according to the working mode comprises: the working mode is discharging in the hybrid mode, acquiring battery consumption power, engine output power efficiency loss ratio, battery output power efficiency loss ratio; multiplying the battery output power efficiency loss ratio by the battery consumption power to obtain a first product; dividing a difference between the first product and the whole vehicle demand power by the engine output power efficiency loss ratio to obtain the engine output power.

3. The method of claim 1, wherein, the determining of the engine output power according to the working mode comprises: the working mode is neither charging nor discharging in the hybrid mode, acquiring engine output power efficiency loss ratio; dividing the whole vehicle demand power by the engine output power efficiency loss ratio to obtain the engine output power.

4. The method according to any one of claims 1 to 3, characterized in that, The method further comprises: acquiring vehicle speed and whole vehicle driving resistance of the vehicle in a current working condition; obtaining the whole vehicle demand power according to the whole vehicle driving resistance and the vehicle speed.

5. The method of claim 1, wherein, the determining of the engine output power according to the working mode comprises: the working mode is pure electric mode, and the engine output power is 0.

6. The method of claim 1, wherein, the calculating of the comprehensive fuel consumption of the vehicle in the feeding mode according to the engine output power and the acquired engine fuel consumption rate, engine fuel density, driving time and driving distance comprises: obtaining engine fuel consumption amount by dividing a product of the engine fuel consumption rate and the engine output power by 9550; calculating an integral result of a quotient of the engine fuel consumption amount divided by 3600 on the driving time; dividing the integral result by a product of the engine fuel density, driving distance and 1000, and then multiplying the result by a fourth numerical value to obtain the comprehensive fuel consumption of the vehicle in the feeding mode.

7. A vehicle integrated fuel consumption calculating device characterized by comprising: comprise: an acquiring module, configured to acquire a working mode of the vehicle; a processing module, configured to determine engine output power according to the working mode; calculate comprehensive fuel consumption of the vehicle in a feeding mode according to the engine output power and acquired engine fuel consumption rate, engine fuel density, driving time and driving distance; The processing module is specifically configured to: when the working mode is the charging of the hybrid mode, acquire the battery consumption power, the engine output power efficiency loss ratio, and the battery output power efficiency loss ratio; multiply the battery output power efficiency loss ratio by the battery consumption power to obtain a first product; divide the sum of the vehicle demand power and the first product by the engine output power efficiency loss ratio to obtain the engine output power.

8. A vehicle integrated fuel consumption calculation system characterized by comprising: The system comprises a driver module, a vehicle controller, a vehicle module, a thermal management module, a thermal management control module, and a computer device. The vehicle module is configured to send the actual vehicle speed of the vehicle to the driver module. The driver module is configured to perform PID adjustment according to the current working condition and the actual vehicle speed to obtain a first signal, the first signal being an accelerator pedal signal or a brake pedal signal, and send the first signal to the vehicle controller and the thermal management control module. The vehicle controller is configured to send the speed and torque of the engine and the speed and torque of the motor to the vehicle module according to the first signal. The thermal management control module is configured to send the air conditioner compressor speed, the water pump speed, and the PTC opening signal to the thermal management module according to the first signal. The computer device is configured to acquire the working mode of the vehicle, determine the engine output power according to the working mode, and calculate the comprehensive fuel consumption of the vehicle in the power feeding mode according to the engine output power, the acquired engine fuel consumption rate, engine fuel density, driving time, and driving distance. The processing module is specifically configured to: when the working mode is the charging of the hybrid mode, acquire the battery consumption power, the engine output power efficiency loss ratio, and the battery output power efficiency loss ratio; multiply the battery output power efficiency loss ratio by the battery consumption power to obtain a first product; divide the sum of the vehicle demand power and the first product by the engine output power efficiency loss ratio to obtain the engine output power.

9. A storage medium, characterized by The storage medium comprises a stored program, wherein the program controls the device in which the storage medium is located to perform the vehicle comprehensive fuel consumption calculation method of any one of claims 1 to 6 when the program is running.

10. A computer device comprising a memory for storing information including program instructions, and a processor for controlling execution of the program instructions, characterized in that, The program instructions are loaded and executed by the processor to implement the steps of the vehicle comprehensive fuel consumption calculation method of any one of claims 1 to 6.

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