Vehicle comprehensive fuel consumption calculation method, device and system and computer equipment

Abstract

The embodiment of the invention provides a vehicle comprehensive fuel consumption calculation method, device and system and computer equipment. According to the technical scheme, the vehicle comprehensive fuel consumption calculation system comprises a driver module, a vehicle control unit, a vehicle module, a heat management module, a heat management control module and the computer equipment. The method comprises the following steps: computer equipment acquires a working mode of a vehicle; determining engine output power according to the working mode; and calculating the comprehensive fuel consumption of the vehicle in the feed mode according to the engine output power and the obtained engine fuel consumption rate, the engine fuel density, the running time and the running distance. The calculation precision of the energy consumption of the new energy vehicle can be improved, and energy conservation and emission reduction measures are taken.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicles, and in particular to a method, device, system and computer equipment for calculating comprehensive fuel consumption of a vehicle. Background Art

[0002] 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 of 2% to 4%, which is relatively large. There are limitations in the verification of energy consumption for subsystem optimization of new energy vehicles, and reliable data support cannot be provided.

[0003] Therefore, the accuracy of calculating the energy consumption of new energy vehicles is low, which to a certain extent hinders the implementation of energy-saving and emission reduction measures. Summary of the invention

[0004] In view of this, the embodiments of the present invention provide a method, device, 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 implement energy-saving and emission reduction measures.

[0005] In a first aspect, an embodiment of the present invention provides a method for calculating comprehensive fuel consumption of a vehicle, the method comprising: Obtaining an operating mode of the vehicle; determining the engine output power 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.

[0006] Optionally, determining the engine output power according to the working mode includes: The working mode is hybrid mode charging, and the battery power consumption, engine output power efficiency loss ratio, and battery output power efficiency loss ratio are obtained; Multiplying the battery output power efficiency loss ratio by the battery consumption power to obtain a first product; The engine output power is obtained by dividing the sum of the vehicle demand power and the first product by the engine output power efficiency loss ratio.

[0007] Optionally, determining the engine output power according to the working mode includes: The working 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; Multiplying the battery output power efficiency loss ratio by the battery consumption power to obtain a first product; The engine output power is obtained by subtracting the first product from the vehicle demand power and dividing it by the engine output power efficiency loss ratio.

[0008] Optionally, determining the engine output power according to the working mode includes: The working mode is a hybrid mode without charging or discharging, and the engine output power efficiency loss ratio is obtained; The engine output power is obtained by dividing the vehicle demand power by the engine output power efficiency loss ratio.

[0009] Optionally, the method further comprises: Obtaining the vehicle speed and vehicle driving resistance of the vehicle in the current working condition; The required power of the whole vehicle is obtained according to the running resistance of the whole vehicle and the vehicle speed.

[0010] Optionally, determining the engine output power according to the working mode includes: The working mode is a pure electric mode, and the engine output power is 0.

[0011] Optionally, the calculating the comprehensive fuel consumption of the vehicle in the power feeding mode according to the engine output power and the acquired engine fuel consumption rate, engine fuel density, driving time and driving distance includes: Obtaining 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 the second value over the driving time; The integrated result is divided by the product of the engine fuel density, the driving distance and the third value, and then multiplied by the fourth value to obtain the comprehensive fuel consumption of the vehicle in the feeding mode.

[0012] On the other hand, an embodiment of the present invention provides a vehicle comprehensive fuel consumption calculation device, the device comprising: An acquisition module, used for acquiring the working mode of the vehicle; The processing module is used to determine the engine output power according to the working mode; and calculate 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.

[0013] On the other hand, an embodiment of the present invention provides a vehicle comprehensive fuel consumption calculation system, the system comprising: Driver module, vehicle controller, vehicle module, thermal management module, thermal management control module and computer equipment; The vehicle module is used to send the actual speed of the vehicle to the driver module; The driver module is used to perform PID adjustment according to the current working condition and the actual vehicle speed to obtain a first signal, where the first signal is an accelerator pedal signal or a brake pedal signal, and send the first information to the vehicle controller and the thermal management control module; The vehicle controller is used 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 used to send an air-conditioning compressor speed, a water pump speed and a PTC start signal to the thermal management module according to the first signal; The computer device is used to obtain 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 feeding mode according to the engine output power and the obtained engine fuel consumption rate, engine fuel density, driving time and driving distance.

[0014] On the other hand, an embodiment of the present invention provides a storage medium, which includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the above method.

[0015] On the other hand, an embodiment of the present invention provides a computer device, including a memory and a processor, wherein 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 implement the steps of the above method when loaded and executed by the processor.

[0016] In the technical solution of the vehicle comprehensive fuel consumption calculation method, device, system and computer equipment provided by the embodiment of the present invention, the method includes: obtaining the working mode of the vehicle; determining the engine output power according to the working mode; calculating the comprehensive fuel consumption of the vehicle in the feeding mode according to the engine output power and the obtained engine fuel consumption rate, engine fuel density, driving time and driving distance. It can improve the calculation accuracy of the energy consumption of new energy vehicles and realize the implementation of energy-saving and emission reduction measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a process of building a vehicle comprehensive fuel consumption calculation system and calculating the vehicle comprehensive fuel consumption in an embodiment of the present invention; Figure 2 A schematic diagram of a vehicle comprehensive fuel consumption calculation system provided by an embodiment of the present invention; Figure 3 Schematic diagram of PID control principle in an embodiment of the present invention; Figure 4 is a schematic diagram of switching between different working modes in an embodiment of the present invention; Figure 5 A schematic diagram of the principle of a thermal management control module in an embodiment of the present invention; Figure 6 is a circuit diagram of a thermal management module in an embodiment of the present invention; Figure 7 This is a schematic diagram of the integrated functional modules in an embodiment of the present invention; Figure 8 It is a curve diagram of WLTC working condition; Fig. 9 A flow chart of a method for calculating comprehensive fuel consumption of a vehicle provided by an embodiment of the present invention; Fig.10 A flow chart of determining engine output power according to an operating mode provided by an embodiment of the present invention; Fig.11 A flowchart of another method of determining engine output power according to an operating mode provided by an embodiment of the present invention; Fig.12 A flowchart of another method of determining engine output power according to an operating mode provided by an embodiment of the present invention; Fig.13 A flowchart for calculating the comprehensive fuel consumption of a vehicle in a power feeding mode according to an embodiment of the present invention based on the engine output power and the acquired engine fuel consumption rate, engine fuel density, driving time and driving distance; Fig.14 A schematic diagram of the structure of a vehicle comprehensive fuel consumption calculation device provided by an embodiment of the present invention; Fig.15 A schematic diagram of a computer device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0019] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0021] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0022] 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 of 2% to 4%, which is relatively large. There are limitations in the verification of energy consumption for subsystem optimization of new energy vehicles, and reliable data support cannot be provided. Therefore, the accuracy of calculating the energy consumption of new energy vehicles is low, which to a certain extent hinders the implementation of energy-saving and emission reduction measures. In response to this, the accuracy and modularization requirements of vehicle energy consumption calculations have been further improved.

[0023] Based on the above technical problems, an embodiment of the present invention proposes a vehicle comprehensive fuel consumption calculation system, which can improve the calculation accuracy of the energy consumption of new energy vehicles and promote the implementation of energy-saving and emission reduction measures.

[0024] Figure 1 The following is a flow chart of building a vehicle comprehensive fuel consumption calculation system and calculating the vehicle comprehensive fuel consumption in an embodiment of the present invention. Figure 2 A schematic diagram of a vehicle comprehensive fuel consumption calculation system provided by an embodiment of the present invention.

[0025] 1. Establishing functional modules like Figure 1 As shown in Figure 1, firstly, the functional modules in the vehicle comprehensive fuel consumption calculation system are established. Figure 2 As shown, the functional modules in the vehicle comprehensive fuel consumption calculation system 100 include: a driver module 101, a vehicle controller 102, a vehicle module 103, a thermal management module 104, and a thermal management controller 105; wherein, the signal input and output between the driver module 101, the vehicle controller 102, the vehicle module 103, the thermal management module 104, and the thermal management controller 105 are transmitted through ports 1 to 4 using a Can bus 106, and the specific connection method is as follows Figure 2 The CAN bus 106 is mainly used to transmit the input and output signals of all functional modules in real time to realize the action of the vehicle.

[0026] In the embodiment of the present invention, the driver module 101 is used to calculate the driving resistance of the whole vehicle under the current working condition.

[0027] Among them, the vehicle driving resistance (Unit: N) is calculated as shown in formula (1): (1) In the formula, is the zero-order coefficient of the vehicle drag coefficient, is the first-order coefficient of the vehicle resistance coefficient, is the quadratic coefficient of the vehicle drag coefficient, For the vehicle in working condition The target vehicle speed at time (unit: km / h), mass is the vehicle mass (unit: kg), For the whole vehicle Acceleration at time (unit: ).in, , , It is the sliding resistance coefficient of the whole vehicle, obtained through the GB / T 12536 test.

[0028] In the embodiment of the present invention, the vehicle module 103 is used to send the actual speed of the vehicle to the driver module 101.

[0029] The vehicle architecture has a P1+P3 series-parallel plug-in hybrid system, which consists of an engine, two motors, a dual-motor controller, a coupler, a power battery and a low-voltage battery. The dual-motor controller can control the two motors to generate electricity or drive at the same time; the coupler controls whether the engine intervenes through an electromagnetic clutch (the clutch is closed at high speed, and the engine directly drives the wheels).

[0030] In the embodiment of the present invention, the driver module 101 is also used to perform PID adjustment according to the current working condition (the relationship between vehicle speed and time) and the actual vehicle speed to obtain a first signal, the first signal being 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.

[0031] Figure 3 Schematic diagram of PID control principle in an embodiment of the present invention, as shown in Figure 3 As shown, the expected input 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.

[0032] In the embodiment of the present invention, the calculation of the PID controller is shown in formula (2): (2) In the formula, is the control output (output of the PID controller), is the error (the difference between the set value and the actual value), , , are the actual parameters of proportional, integral and differential gains respectively. =0.1, =0.01, =0, it is closer to the measured data.

[0033] In the embodiment of the present invention, the vehicle controller 102 is mainly used for mode switching, power distribution, and driver control, and outputs engine torque request, engine on / off, generator torque, drive motor torque, and clutch on / off signals to the vehicle module 103. The vehicle controller 102 includes a plug-in hybrid mode switching module for switching different working modes.

[0034] Figure 4 Schematic diagram of switching between different working modes in an embodiment of the present invention, such as Figure 4 As shown in the figure, there are 4 working modes, namely, shutdown mode, pure electric mode, parallel mode and series mode. Among them, parallel mode and series mode belong to hybrid mode.

[0035] In the embodiment of the present invention, the working mode of the vehicle may also include the charging and discharging state of the vehicle.

[0036] In the embodiment of the present invention, the vehicle controller 102 is used to send the engine speed and torque, the motor speed and torque to the vehicle module 103 according to the first signal.

[0037] In some possible embodiments, the vehicle controller 102 is used to complete the vehicle mode switching according to the first signal, and output the engine speed and torque, and the motor speed and torque to the vehicle module 103 after engine start and stop, clutch opening and closing, power distribution, etc.

[0038] In the embodiment of the present invention, the thermal management control module 105 is used to send the air-conditioning compressor speed, the water pump speed and the PTC start signal to the thermal management module 104 according to the first signal.

[0039] In some possible embodiments, the thermal management control module 105 is used to send the air conditioning compressor speed, water pump speed and PTC opening signal to the thermal management module 104 after completing the air conditioning opening and closing, PTC opening and closing and other tasks according to the first signal.

[0040] Figure 5 FIG. 1 is a schematic diagram of the thermal management control module principle in an embodiment of the present invention. Figure 5 As shown, the thermal management control module can obtain the ambient temperature sensor temperature, compressor suction temperature, battery water inlet temperature, battery water outlet temperature, radiator water outlet temperature, internal exchange inlet temperature and external exchange inlet temperature through the Can bus.

[0041] Figure 6 is a circuit diagram of a thermal management module in an embodiment of the present invention, such as Figure 6 As shown, the thermal management module is mainly composed of an air-conditioning module, a low-temperature circuit, and a high-temperature circuit.

[0042] (II) Integrated functional modules The vehicle comprehensive fuel consumption calculation system 100 further includes: a computer device ( Figure 2 The computer device is not shown in the figure). The computer device is connected to the driver module 101, the vehicle controller 102, the vehicle module 103, the thermal management module 104, and the thermal management controller 105 through the Can bus 106, so the parameters in each module can be obtained through the Can bus 106.

[0043] Based on the functional modules of the vehicle comprehensive fuel consumption calculation system established above, the functional modules are integrated using a related software platform (which can be installed in a computer device). Figure 7 FIG. 1 is a schematic diagram of the integrated functional modules in an embodiment of the present invention. Figure 7 As shown in the figure, the integrated vehicle comprehensive fuel consumption calculation system includes a control model, a Can bus, and a vehicle, driver, and thermal management model. Among them, the control model is the control model end, which includes a thermal management control module, a vehicle control module, and an S function; the vehicle, driver, and thermal management model belong to the physical model end, which includes a driver module, a vehicle module, a thermal management module, and control strategy input and output. For the physical model end, the Can bus is automatically connected; for the control model end, the Can bus calibration variables are automatically identified.

[0044] like Figure 7 As shown, the signals transmitted between the control model and the whole vehicle, the driver, and the thermal management model through the Can bus include but are not limited to SOC signals, vehicle speed signals, engine speed signals, required braking torque signals, required driving torque signals, required power signals, motor speed signals, motor torque signals, water pump speed signals, clutch engagement signals, engine start signals, engine load signals, engine speed signals, engine torque signals, thermostat opening signals, compressor speed signals, vehicle operating mode signals, and signals for calling the compiler to generate S functions, etc.

[0045] The integrated vehicle comprehensive fuel consumption calculation system is not limited by the actual prototype manufacturing, actual road scenes, bench equipment accuracy, etc., and only needs to input the required calibration conditions, vehicle and component parameters, and calibration parameters to simulate the entire process of vehicle operation under the conditions, and calculate the energy consumption loss during the conditions, and simulate the energy consumption level of the vehicle under high and low temperature environments and real control strategies. This can achieve accurate prediction and virtual calibration of vehicle energy consumption, shortening the product development cycle by more than 10%.

[0046] (III) Solution calculation In an embodiment of the present invention, a computer device is used to obtain an operating mode of a vehicle, determine an engine output power according to the operating mode, and calculate a comprehensive fuel consumption of the vehicle in a power feeding mode according to the engine output power and the obtained engine fuel consumption rate, engine fuel density, driving time, and driving distance.

[0047] The solution calculation mainly calculates the comprehensive fuel consumption in the feeding mode.

[0048] First, select the working condition and input it into the computer equipment. The test condition is selected according to GB∕T 19753, for example, the World Light Vehicle Test Cycle (WLTC) condition is selected. Figure 8 This is a curve diagram of the WLTC operating condition, which is mainly used to evaluate the fuel economy and emission performance of the vehicle.

[0049] Secondly, obtain the vehicle driving resistance calculated by the driver module according to formula (1) , calculate the vehicle required power according to formula (3) (Unit: kw): (3) Next, the above-mentioned vehicle comprehensive fuel consumption calculation system is used to simulate and calculate the fuel consumption rate FC (unit: g / kWh) of the engine.

[0050] Then, the working mode of the vehicle is obtained, and the engine output power is determined according to the working mode.

[0051] In some possible embodiments, the working mode is hybrid mode charging, and the battery consumption power is obtained. , Engine output power efficiency loss ratio (0-1), battery output power efficiency loss ratio (0-1); Calculate the engine output power according to formula (4) : (4) In some possible embodiments, the working mode is hybrid mode discharge, and the battery consumption power is obtained. , Engine output power efficiency loss ratio (0-1), battery output power efficiency loss ratio (0-1); Calculate the engine output power according to formula (5) : (5) therefore, and The distribution of power depends on the power distribution strategy in hybrid mode.

[0052] In some possible embodiments, the working mode is a hybrid mode without charging or discharging, and the engine output power efficiency loss ratio is obtained. (0-1); Calculate the engine output power according to formula (6) : (6) In some possible embodiments, the working mode is a pure electric mode. .

[0053] Finally, according to the engine output power , engine fuel consumption rate FC, engine fuel density The comprehensive fuel consumption of the vehicle in feeding mode is calculated based on the driving time t (unit: g / ml), driving distance L (unit: km).

[0054] For example, the comprehensive fuel consumption E (unit: L / 100km) of the vehicle in the feeding mode is calculated according to formulas (7)-(8): (7) (8) And it meets the correction standard c≤0.005 and is calculated according to the method in Appendix A of National Standard 19753-2021.

[0055] Where M is the engine fuel consumption (unit: g / h).

[0056] The embodiment of the present invention provides a method for calculating comprehensive fuel consumption of a vehicle, which can improve the calculation accuracy of energy consumption of new energy vehicles and realize the implementation of energy-saving and emission reduction measures.

[0057] Fig. 9 A flowchart of a method for calculating comprehensive fuel consumption of a vehicle provided by an embodiment of the present invention is shown in FIG. Fig. 9 As shown, the method includes: Step 201: Obtain the working mode of the vehicle.

[0058] In the embodiment of the present invention, each step may be executed by a computer device.

[0059] Exemplarily, the working modes of the vehicle include: stop mode, pure electric mode, parallel mode or series mode, and charge and discharge state. Among them, the parallel mode and the series mode belong to the hybrid mode.

[0060] Step 202: Determine the engine output power according to the working mode.

[0061] In some possible embodiments, the working mode is hybrid mode charging, such as Fig.10 As shown, step 202 includes: Step S11, obtaining battery power consumption, engine output power efficiency loss ratio, and battery output power efficiency loss ratio.

[0062] In the embodiment of the present invention, the working mode is hybrid mode charging, and the engine output power is calculated according to the above formula (4): , so we need to obtain the battery power consumption , Engine output power efficiency loss ratio , Battery output power efficiency loss ratio .

[0063] Step S12: multiply the battery output power efficiency loss ratio by the battery consumption power to obtain a first product.

[0064] In this step, according to formula (4), the battery output power efficiency loss ratio is Power consumption with battery Multiply to get the first product .

[0065] Step S13: 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.

[0066] In this step, according to formula (4), the vehicle required power With the first product The sum of the total power divided by the engine output power efficiency loss ratio Get engine output power .

[0067] In some possible embodiments, the working mode is a hybrid mode discharge, such as Fig.11 As shown, step 202 includes: Step S21, obtaining battery power consumption, engine output power efficiency loss ratio, and battery output power efficiency loss ratio.

[0068] In the embodiment of the present invention, the working mode is hybrid mode discharge, and the engine output power is calculated according to the above formula (5): , need to obtain the battery power consumption , Engine output power efficiency loss ratio , Battery output power efficiency loss ratio .

[0069] Step S22: multiply the battery output power efficiency loss ratio by the battery consumption power to obtain a first product.

[0070] In this step, according to formula (5), the battery output power efficiency loss ratio is Power consumption with battery Multiply to get the first product .

[0071] Step S23: Divide the difference between the vehicle demand power and the first product by the engine output power efficiency loss ratio to obtain the engine output power.

[0072] In this step, according to formula (5), the vehicle required power Subtract the first product The difference between the engine output power and the efficiency loss ratio Get engine output power .

[0073] In some possible embodiments, the working mode is a hybrid mode without charging or discharging, such as Fig.12 As shown, step 202 includes: Step S31: Obtain the engine output power efficiency loss ratio.

[0074] In the embodiment of the present invention, the working mode is a hybrid mode without charging or discharging. The engine output power is calculated according to the above formula (6): , it is necessary to obtain the engine output power efficiency loss ratio .

[0075] Step S32: Divide the vehicle demand power by the engine output power efficiency loss ratio to obtain the engine output power.

[0076] In this step, according to formula (6), the vehicle required power Divide by engine output power efficiency loss ratio Get engine output power .

[0077] In the embodiment of the present invention, before determining the engine output power, the vehicle speed under the current working condition is also obtained. and vehicle driving resistance ; According to the vehicle's driving resistance , vehicle speed Get the vehicle required power The specific calculation process can refer to the above formula (3).

[0078] In some possible embodiments, the operating mode is a pure electric mode, and the engine output power is 0.

[0079] Step 203: Calculate the comprehensive fuel consumption of the vehicle in the power feeding mode according to the engine output power and the acquired engine fuel consumption rate, engine fuel density, driving time and driving distance.

[0080] In some possible embodiments, Fig.13 As shown, step 203 includes: Step S41: Obtain the engine fuel consumption by dividing the product of the engine fuel consumption rate and the engine output power by a first value.

[0081] In the embodiment of the present invention, the comprehensive fuel consumption E of the vehicle in the feeding mode can be calculated according to the above formulas (7)-(8). According to formula (7), firstly, the engine fuel consumption rate FC and the engine output power The product of divided by the first value is the engine fuel consumption M. The first value is 9550.

[0082] Step S42: Calculate the integral of the quotient of the engine fuel consumption divided by the second value over the driving time.

[0083] In the embodiment of the present invention, after the engine fuel consumption M is calculated, according to formula (8), the integral result 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.

[0084] Step S43: Divide the integration result by the product of the engine fuel density, the driving distance and the third value, and then multiply it by the fourth value to obtain the comprehensive fuel consumption of the vehicle in the feeding mode.

[0085] In the embodiment of the present invention, according to formula (8), the integrated result is divided by the product of the engine fuel density σ, the driving distance L and the third value, the third value is 1000; and then multiplied by the fourth value to obtain the comprehensive fuel consumption E of the vehicle in the feeding mode, the fourth value is 100.

[0086] The embodiment of the present invention proposes an energy consumption calculation method for a plug-in hybrid electric vehicle that integrates the entire vehicle, the entire vehicle control, the thermal management control, and the thermal management system, and performs modular processing on the energy consumption calculation method.

[0087] The embodiment of the present invention proposes an energy consumption calculation method for a high-precision modular control strategy in the loop for plug-in hybrid electric vehicles. Through this method, the subsystem simulation accuracy is ≤0.5%, and the vehicle energy consumption simulation accuracy is ≤1%, which is far higher than the traditional bench verification accuracy of 2-4%.

[0088] The embodiment of the present invention relies on a high-precision simulation model to quickly and efficiently verify and accurately evaluate the energy consumption of the entire vehicle after the key technologies of each subsystem are coupled, and quickly separate the impact of different systems on the energy consumption of the entire vehicle.

[0089] The embodiment of the present invention proposes an energy consumption integration algorithm that couples multiple disciplines of the whole vehicle (machine), power battery (electricity), thermal management (heat, fluid), and control strategy (control), establishes an energy consumption model that integrates the whole vehicle and thermal management control strategy in a loop, and establishes a method that automatically determines the balance point and outputs the energy consumption results in each mode.

[0090] In a technical solution of a method for calculating comprehensive fuel consumption of a vehicle provided in an embodiment of the present invention, the method includes: obtaining the working mode of the vehicle; determining the engine output power according to the working mode; and calculating the comprehensive fuel consumption of the vehicle in the feeding mode according to the engine output power and the obtained engine fuel consumption rate, engine fuel density, driving time and driving distance. The calculation accuracy of the energy consumption of new energy vehicles can be improved, and energy-saving and emission reduction measures can be implemented.

[0091] Fig.14 A schematic diagram of the structure of a vehicle comprehensive fuel consumption calculation device provided by an embodiment of the present invention, such as Fig.14 As shown, the device comprises: An acquisition module 31 is used to acquire the working mode of the vehicle; The processing module 32 is used to determine the engine output power according to the working mode; and calculate 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.

[0092] In some possible embodiments, the working mode is hybrid mode charging, and the acquisition module 31 is also used to obtain 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; and 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.

[0093] In some possible embodiments, the working mode is hybrid mode discharge, and the acquisition module 31 is further used to obtain 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; The engine output power is obtained by subtracting the difference between the vehicle demand power and the first product and dividing it by the engine output power efficiency loss ratio.

[0094] In some possible embodiments, the working mode is a hybrid mode without charging or discharging, and the acquisition module 31 is also used to obtain the engine output power efficiency loss ratio; the processing module 32 is specifically used to divide the vehicle demand power by the engine output power efficiency loss ratio to obtain the engine output power.

[0095] In some possible embodiments, the acquisition module 31 is also used to obtain the vehicle speed and vehicle driving resistance under the current working condition; the processing module 32 is also used to obtain the vehicle required power according to the vehicle driving resistance and vehicle speed.

[0096] In some possible embodiments, the operating mode is a pure electric mode, and the engine output power is 0.

[0097] 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; calculating the integral result of the quotient of the engine fuel consumption divided by the second value over the driving time; dividing the integral result by the product of the engine fuel density, the driving distance and a third value, and then multiplying it by a fourth value to obtain the comprehensive fuel consumption of the vehicle in the feeding mode.

[0098] In the technical solution provided by the embodiment of the present invention, the working mode of the vehicle is obtained; the engine output power is determined according to the working mode; and the comprehensive fuel consumption of the vehicle in the feeding mode is calculated according to the engine output power and the obtained engine fuel consumption rate, engine fuel density, driving time and driving distance. The calculation accuracy of the energy consumption of new energy vehicles can be improved, and the implementation of energy-saving and emission reduction measures can be achieved.

[0099] An embodiment of the present application provides a storage medium, which includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the above method.

[0100] An embodiment of the present application provides a computer device, including a memory and a processor, wherein 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 implement the steps of the above method when loaded and executed by the processor.

[0101] Fig.15 A schematic diagram of the structure of a computer device provided in an embodiment of the present application is shown in FIG. Fig.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, the energy management method applied in the embodiment is implemented. To avoid repetition, they are not described one by one here.

[0102] The computer device 20 includes, but is not limited to, a processor 21 and a memory 22. Those skilled in the art will appreciate that Fig.15 It is only an example of the computer device 20 and does not constitute a limitation of the computer device 20. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the computer device 20 may also include input and output devices, network access devices, buses, etc.

[0103] The processor 21 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), 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, etc.

[0104] The memory 22 may be an internal storage unit of the computer device 20, such as a hard disk or memory of the computer device 20. The memory 22 may also be an external storage device of the computer device 20, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the computer device 20. Further, the memory 22 may also include both an internal storage unit of the computer device 20 and an external storage device. The memory 22 is used to store computer programs and other programs and data required by the computer device 20. The memory 22 may also be used to temporarily store data that has been output or is to be output.

[0105] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0106] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0107] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0108] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0109] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor to perform some steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.

[0110] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for calculating comprehensive fuel consumption of a vehicle, characterized in that: The method comprises: Obtaining an operating mode of the vehicle; determining the engine output power 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.

2. The method according to claim 1, characterized in that Determining the engine output power according to the working mode includes: The working mode is hybrid mode charging, and the battery power consumption, engine output power efficiency loss ratio, and battery output power efficiency loss ratio are obtained; Multiplying the battery output power efficiency loss ratio by the battery consumption power to obtain a first product; The engine output power is obtained by dividing the sum of the vehicle demand power and the first product by the engine output power efficiency loss ratio.

3. The method according to claim 1, characterized in that Determining the engine output power according to the working mode includes: The working 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; Multiplying the battery output power efficiency loss ratio by the battery consumption power to obtain a first product; The engine output power is obtained by subtracting the first product from the vehicle demand power and dividing it by the engine output power efficiency loss ratio.

4. The method according to claim 1, characterized in that: Determining the engine output power according to the working mode includes: The working mode is a hybrid mode without charging or discharging, and the engine output power efficiency loss ratio is obtained; The engine output power is obtained by dividing the vehicle demand power by the engine output power efficiency loss ratio.

5. The method according to any one of claims 2 to 4, characterized in that: The method further comprises: Obtaining the vehicle speed and vehicle driving resistance of the vehicle in the current working condition; The required power of the whole vehicle is obtained according to the running resistance of the whole vehicle and the vehicle speed.

6. The method according to claim 1, characterized in that Determining the engine output power according to the working mode includes: The working mode is a pure electric mode, and the engine output power is 0.

7. The method according to claim 1, characterized in that The calculating the comprehensive fuel consumption of the vehicle in the power feeding mode according to the engine output power and the acquired engine fuel consumption rate, engine fuel density, driving time and driving distance includes: Obtaining 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 the second value over the driving time; The integrated result is divided by the product of the engine fuel density, the driving distance and the third value, and then multiplied by the fourth value to obtain the comprehensive fuel consumption of the vehicle in the feeding mode.

8. A vehicle comprehensive fuel consumption calculation device, characterized in that: include: An acquisition module, used for acquiring the working mode of the vehicle; A processing module, used to determine the engine output power 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.

9. A vehicle comprehensive fuel consumption calculation system, characterized in that: The system includes: 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 used to send the actual speed of the vehicle to the driver module; The driver module is used to perform PID adjustment according to the current working condition and the actual vehicle speed to obtain a first signal, where the first signal is an accelerator pedal signal or a brake pedal signal, and send the first information to the vehicle controller and the thermal management control module; The vehicle controller is used 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 used to send an air-conditioning compressor speed, a water pump speed and a PTC start signal to the thermal management module according to the first signal; The computer device is used to obtain 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 feeding mode according to the engine output power and the obtained engine fuel consumption rate, engine fuel density, driving time and driving distance.

10. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the vehicle comprehensive fuel consumption calculation method according to any one of claims 1 to 7.

11. A computer device comprising a memory and a processor, wherein the memory is used to store information including program instructions, and the processor is used to control the execution of the program instructions, characterized in that: When the program instructions are loaded and executed by the processor, the steps of the vehicle comprehensive fuel consumption calculation method described in any one of claims 1 to 7 are implemented.

Images