Method, device and equipment for estimating endurance of extended-range vehicle

Abstract

The invention discloses a method, a device and equipment for estimating the endurance of an extended-range vehicle, belongs to the technical field of automobiles, and can solve the problem that the endurance mileage of the extended-range vehicle cannot be accurately predicted. The method comprises the steps that the range extender rotating speed, the range extender generating power and the range extender fuel injection quantity of a vehicle in a target time period are obtained; determining a test oil-electricity conversion value according to the rotating speed of the range extender and the generated power of the range extender; determining a historical oil-electricity conversion value and an instantaneous oil-electricity conversion value according to the oil injection quantity of the range extender and the power generation power of the range extender; determining a target oil-electricity conversion value according to the test oil-electricity conversion value, the historical oil-electricity conversion value and the instantaneous oil-electricity conversion value; and determining the remaining endurance mileage of the vehicle according to the target oil-electricity conversion value.

Description

Technical Field

[0001] This application belongs to the field of automotive technology, specifically relating to a method, apparatus, and equipment for estimating the range of a range-extended vehicle. Background Technology

[0002] Range-extended electric vehicles (REEVs) need to constantly calculate their remaining driving range during operation to ensure that drivers can recharge in a timely manner. Current technologies typically use a fixed fuel-to-electricity conversion factor, combined with remaining fuel and average energy consumption per 100 kilometers, to estimate the driving range.

[0003] In existing technologies, the actual oil-to-electric conversion efficiency varies dynamically due to the condition of the equipment itself and environmental factors. A fixed oil-to-electric conversion coefficient cannot truly reflect energy consumption fluctuations and cannot accurately predict the remaining driving range, thus affecting the driver's travel arrangements. Summary of the Invention

[0004] The purpose of this application is to provide a method, apparatus, and device for estimating the range of range-extended vehicles, which can solve the problem of not being able to accurately predict the range of range-extended vehicles.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application provide a method for estimating the range of a range-extended vehicle, the method comprising: Obtain the range extender speed, range extender power generation, and range extender fuel injection quantity of the vehicle within the target time period. The test oil-to-electric conversion value is determined based on the range extender speed and range extender power generation of the vehicle. The historical fuel-electric conversion value and the instantaneous fuel-electric conversion value are determined based on the fuel injection quantity and power generation of the range extender of the vehicle. The target oil-electric conversion value is determined based on the tested oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value. The remaining driving range of the vehicle is determined based on the target oil-to-electric conversion value.

[0006] Optionally, the target time period includes a first historical time period, and determining the test oil-to-electric conversion value based on the range extender speed and the range extender power generation includes: Obtain the average rotational speed and average power generation of the range extender during the first historical time period; The test oil-to-electric conversion value is determined based on the average rotational speed of the range extender and the average power generation of the range extender.

[0007] Optionally, determining the test oil-to-electric conversion value based on the average speed of the range extender and the average power generation of the range extender includes: The test oil-to-electric conversion value is determined based on the range extender's average speed, the range extender's power generation, and the target mapping relationship, wherein the target mapping relationship is used to indicate the mapping relationship between the range extender's speed, the range extender's power generation, and the oil-to-electric conversion value.

[0008] Optionally, the step of obtaining the target mapping relationship includes: A two-dimensional test matrix is ​​set up, where each point of the two-dimensional test matrix represents the rotational speed of the vehicle's range extender and the power generation of the range extender; The vehicle is tested according to the points in the two-dimensional test matrix. When the parameter fluctuation of the range extender is less than the preset parameter fluctuation threshold, the range extender speed, the power generation and the oil-electric conversion value are recorded to obtain the target mapping relationship.

[0009] Optionally, the target time period includes a second historical time period, and the historical fuel-to-electric conversion value is determined based on the fuel injection quantity and power generation of the vehicle's range extender, including: Based on the range extender's power generation during the second historical period, determine the first cumulative power generation during the second historical period. The historical fuel-to-electricity conversion value is determined based on the first cumulative power generation and the first engine fuel consumption.

[0010] Optionally, the target time period includes a third historical time period, and the instantaneous fuel-to-electricity conversion value is determined based on the fuel injection quantity and power generation of the vehicle's range extender. Based on the range extender's power generation during the third historical period, determine the second cumulative power generation during the third historical period. The fuel consumption of the second engine during the third historical time period is determined based on the fuel injection quantity of the range extender during the third historical time period. The instantaneous oil-to-electricity conversion value is determined based on the second cumulative power generation and the second engine fuel consumption.

[0011] Optionally, determining the target oil-electric conversion value based on the tested oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value includes: Obtain the historical weighting coefficient corresponding to the test oil-electric conversion value, the second weighting coefficient corresponding to the instantaneous oil-electric conversion value, and the third weighting coefficient corresponding to the instantaneous oil-electric conversion value; The target oil-electric conversion value is obtained by weighting and summing the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value according to the first weighting coefficient, the second weighting coefficient, and the third weighting coefficient.

[0012] Optionally, determining the vehicle's remaining driving range based on the target hybrid conversion value includes: Obtain the remaining fuel level of the vehicle from the vehicle's fuel gauge; Obtain the pre-tested average power consumption under operating conditions from the vehicle's memory; The remaining driving range is determined based on the remaining fuel, the average power consumption under operating conditions, and the target fuel-to-electricity conversion value.

[0013] Secondly, this application proposes a range estimation device for range-extended vehicles, the device comprising: The data acquisition module is used to obtain the range extender speed, range extender power generation, and range extender fuel injection quantity of the vehicle within the target time period; The test oil-electric conversion value determination module is used to determine the test oil-electric conversion value based on the range extender speed and range extender power generation of the vehicle. The instantaneous fuel-electric conversion value determination module is used to determine the historical fuel-electric conversion value and the instantaneous fuel-electric conversion value based on the fuel injection quantity and power generation of the range extender of the vehicle. The target oil-electric conversion value determination module is used to determine the target oil-electric conversion value based on the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value. The driving range estimation module is used to determine the remaining driving range of the vehicle based on the target oil-electric conversion value.

[0014] Optionally, the test oil-to-electricity conversion value determination module includes: The first data acquisition submodule is used to obtain the average speed of the range extender and the average power generation of the range extender during the first historical time period. The test oil-to-electric conversion value determination submodule is used to determine the test oil-to-electric conversion value based on the average speed of the range extender and the average power generation of the range extender.

[0015] Optionally, the test oil-to-electricity conversion value determination submodule includes: The oil-to-electric conversion value lookup submodule is used to determine the test oil-to-electric conversion value based on the average speed of the range extender, the power generation of the range extender, and the target mapping relationship, wherein the target mapping relationship is used to indicate the mapping relationship between the range extender speed, the range extender power generation, and the oil-to-electric conversion value.

[0016] Optionally, the step of obtaining the target mapping relationship includes: A two-dimensional test matrix is ​​set up, where each point of the two-dimensional test matrix represents the rotational speed of the vehicle's range extender and the power generation of the range extender; The vehicle is tested according to the points in the two-dimensional test matrix. When the parameter fluctuation of the range extender is less than the preset parameter fluctuation threshold, the range extender speed, the power generation and the oil-electric conversion value are recorded to obtain the target mapping relationship.

[0017] Optionally, the instantaneous oil-to-electricity conversion value determination module includes: The second data acquisition submodule is used to determine the first cumulative power generation in the second historical time period based on the power generation of the range extender in the second historical time period. The historical oil-to-electricity conversion value determination submodule is used to determine the historical oil-to-electricity conversion value based on the first cumulative power generation and the first engine fuel consumption. Optionally, the instantaneous oil-to-electricity conversion value determination module includes: The third data determination submodule is used to determine the second cumulative power generation within the third historical time period based on the range extender's power generation during the third historical time period. The fourth data determination submodule is used to determine the fuel consumption of the second engine in the third historical time period based on the fuel injection quantity of the range extender in the third historical time period. The instantaneous oil-to-electricity conversion value determination submodule is used to determine the instantaneous oil-to-electricity conversion value based on the second cumulative power generation and the second engine fuel consumption.

[0018] Optionally, the target oil-to-electricity conversion value determination module includes: The weighting coefficient determination submodule is used to determine, based on the average fuel-electric conversion value, instantaneous fuel-electric conversion value, historical fuel-electric conversion value, and test fuel-electric conversion value of the vehicle obtained from pre-tests, a first weighting coefficient corresponding to the test fuel-electric conversion value, a second weighting coefficient corresponding to the historical fuel-electric conversion value, and a third weighting coefficient corresponding to the instantaneous fuel-electric conversion value. The weighted summation submodule is used to perform a weighted summation of the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value based on the first weighting coefficient, the second weighting coefficient, and the third weighting coefficient to obtain the target oil-electric conversion value.

[0019] Optionally, the range estimation module includes: The remaining fuel level determination submodule is used to obtain the remaining fuel level of the vehicle from the vehicle's fuel level gauge. The average power consumption under operating conditions determination submodule is used to obtain the pre-tested average power consumption under operating conditions from the vehicle's memory. The remaining driving range determination submodule is used to determine the remaining driving range based on the remaining fuel, the average power consumption under operating conditions, and the target fuel-to-electricity conversion value.

[0020] Thirdly, embodiments of this application provide an electronic device including a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the method described in the first aspect.

[0021] Fourthly, embodiments of this application provide a readable storage medium on which a program or instructions are stored, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0022] Fifthly, embodiments of this application provide a chip, the chip including a processor and a communication interface, the communication interface being coupled to the processor, the processor being used to run programs or instructions to implement the method as described in the first aspect.

[0023] The range estimation method for range-extended vehicles provided in this application involves obtaining the range extender speed, range extender power generation, and range extender fuel injection quantity of the vehicle within a target time period; determining a test fuel-electric conversion value based on the range extender speed and the range extender power generation; determining historical fuel-electric conversion values ​​and instantaneous fuel-electric conversion values ​​based on the range extender fuel injection quantity and the range extender power generation; determining a target fuel-electric conversion value based on the test fuel-electric conversion value, the historical fuel-electric conversion value, and the instantaneous fuel-electric conversion value; and determining the remaining driving range of the vehicle based on the target fuel-electric conversion value.

[0024] In this method, the test fuel-electric conversion value is determined by detecting the range extender speed and the range extender power generation. Then, the historical fuel-electric conversion value and the instantaneous fuel-electric conversion value are determined based on the range extender fuel injection quantity and the range extender power generation. The three fuel-electric conversion values ​​are combined to obtain the target fuel-electric conversion value. The remaining driving range is then determined based on the target fuel-electric conversion value. In this way, the dynamic fuel-electric conversion value is obtained by observing the real-time operating status of the range extender, and the remaining driving range is estimated based on the dynamic fuel-electric conversion value, which improves the accuracy of the remaining driving range estimation for range-extended vehicles. Attached Figure Description

[0025] Figure 1 This is a flowchart of a range-extended vehicle range estimation method proposed in an embodiment of this application; Figure 2 This is a schematic diagram of a test bench for a range extender system according to an embodiment of this application; Figure 3 This is a schematic diagram of a range-extended vehicle range estimation device according to an embodiment of this application; Figure 4 This is a schematic diagram of the hardware structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0028] The core component of a range-extended electric vehicle is the range extender, which consists of an engine and a generator. When the battery has sufficient charge, the vehicle is driven by pure electric power. When the battery charge is below a threshold, the engine starts and drives the electric motor to generate electricity, which is directly supplied to the motor to drive the wheels. Excess electricity is stored back into the battery. The generator consumes fuel when it starts.

[0029] The range estimation method for range-extended vehicles provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0030] refer to Figure 1 , Figure 1 This is a flowchart of a range-extended vehicle range estimation method proposed in an embodiment of this application, as shown below. Figure 1 As shown, the method specifically includes the following steps: S11 obtains the vehicle's range extender speed, range extender power generation, and range extender fuel injection quantity during the target time period: In this embodiment, the target time period includes a first historical time period, a second historical time period, and a third historical time period. The range extender speed and power output collected during the first historical time period are used to obtain the test fuel-electric conversion value. The range extender fuel injection quantity and power output collected during the second historical time period are used to calculate the historical fuel-electric conversion value. The range extender fuel injection quantity and power output collected during the third historical time period are used to calculate the instantaneous fuel-electric conversion value. The first historical time period is longer than the second historical time period, and the second historical time period is longer than the third historical time period. The first, second, and third historical time periods can all be set according to actual needs.

[0031] S12: Determine the test oil-to-electric conversion value based on the range extender speed and range extender power generation of the vehicle.

[0032] In this embodiment, the range extender speed refers to the rotational speed of the engine in the range extender, usually expressed in RPM (revolutions per minute). The range extender power generation refers to the power generation capacity of the generator in the range extender. The fuel-to-electricity conversion value is a core conversion factor that converts fuel consumption (liters) into equivalent electricity consumption (kWh), used to uniformly measure the vehicle's overall energy consumption performance in hybrid mode. The tested fuel-to-electricity conversion value is obtained from historical test data.

[0033] In this embodiment, within the first historical time period, the range extender speed and range extender power output are collected at regular intervals. The average speed and average power output of the range extender over the past period are then calculated. Based on these average speed and power output, the corresponding fuel-electric conversion value for the vehicle's range extender is found in a pre-tested table of range extender speed, power output, and bench fuel-electric conversion coefficient. This found fuel-electric conversion value is used as the test fuel-electric conversion value. Furthermore, the test fuel-electric conversion value needs to be refreshed at short intervals to ensure that the test fuel-electric conversion value changes constantly with the speed and power output.

[0034] S13: Determine the historical fuel-electric conversion value and the instantaneous fuel-electric conversion value based on the fuel injection quantity and power generation of the range extender of the vehicle.

[0035] In this embodiment, the fuel injection quantity of the range extender refers to the mass or volume of gasoline injected into the cylinder by the fuel injection system used to drive the generator internal combustion engine (i.e., the range extender) in each working cycle of a range-extended electric vehicle. The historical fuel-electric conversion value is the historical average fuel-electric conversion value, reflecting the average fuel-electric conversion value over a historical period. The instantaneous fuel-electric conversion value is the instantaneous average fuel-electric conversion value, reflecting the fuel-electric conversion value of the range extender at the current instant.

[0036] In this embodiment, the range extender's fuel injection quantity and generator power are collected at regular intervals within the second historical time period. The cumulative power generation and engine fuel consumption over the past historical period are calculated. Then, the historical average fuel-electric conversion value is determined based on the cumulative power generation and generator fuel consumption, thereby determining the historical fuel-electric conversion value. The historical fuel-electric conversion value needs to be refreshed at certain intervals to incorporate the current range extender's power generation and fuel injection quantity into the calculation of the historical average fuel-electric conversion value.

[0037] In this embodiment, during the third historical time period, the fuel injection quantity and power generation of the range extender are collected every time period. The cumulative power generation of the range extender and the fuel consumption of the engine over the past period are calculated to obtain the instantaneous average fuel-electric conversion value, i.e., the instantaneous fuel-electric conversion value. The instantaneous fuel-electric conversion value needs to be refreshed at a certain interval to reflect the current fuel-electric conversion value.

[0038] S14: Determine the target oil-electric conversion value based on the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value.

[0039] In this embodiment, the target oil-electric conversion value is a dynamic oil-electric conversion value, which is a dynamic oil-electric conversion value obtained by combining multiple oil-electric conversion values, and can reflect the current working status of the range extender.

[0040] In this embodiment, the test oil-to-electric conversion value, historical oil-to-electric conversion value, and instantaneous oil-to-electric conversion value are weighted and calculated to obtain the target oil-to-electric conversion value. The weighting coefficients are obtained based on pre-conducted tests.

[0041] S15: Determine the remaining driving range of the vehicle based on the target oil-to-electric conversion value.

[0042] In this embodiment, after obtaining the target oil-to-electricity conversion value, the remaining fuel level is collected from the fuel gauge, and then combined with the average power consumption under pre-tested conditions to calculate the vehicle's remaining driving range.

[0043] In this embodiment, the range extender's speed, power generation efficiency, and fuel consumption are combined to statistically analyze the range extender's historical average fuel-electric conversion value and calculate the range extender's instantaneous average fuel-electric conversion value. The dynamic fuel-electric conversion value is also obtained by combining the results of pre-tests, which is helpful for accurately predicting the remaining driving range during driving.

[0044] In another embodiment of this application, determining the test oil-to-electric conversion value based on the range extender speed and the range extender power generation of the vehicle includes: S21: Obtain the average rotational speed of the range extender and the average power generation of the range extender during the first historical time period.

[0045] In this embodiment, when determining the test oil-to-electricity conversion value, the range extender speed and range extender power generation are collected at every first preset time interval. The first preset time interval can be set in advance.

[0046] In this embodiment, the average rotational speed of the range extender during the first historical time period is determined based on the range extender rotational speed collected during that period. The average power output of the range extender during the first historical time period is also determined based on the range extender power output collected during that period.

[0047] For example, the first preset time period includes, but is not limited to, 1 minute, that is, the range extender speed n and the range extender power generation P are collected every 1 minute. The first historical time period includes, but is not limited to, the past 600 minutes to the current moment. The average speed n of the range extender during the past 600 minutes to the current moment is averaged as (n1+n2+n3…+n600) / 600, and the average power generation P is averaged as (P1+P2+P3…+P600) / 600.

[0048] S22: Determine the test oil-to-electric conversion value based on the average speed of the range extender and the average power generation of the range extender.

[0049] In this embodiment, after obtaining the average speed and average power generation of the range extender, the corresponding oil-to-electric conversion value is queried based on these two parameters to obtain the test oil-to-electric conversion value.

[0050] For example, the test value for oil-to-electric conversion is ηmodel.

[0051] In this embodiment, by obtaining the average speed and average power generation of the vehicle's range extender, the corresponding oil-electric conversion value is found in the pre-tested data, providing a basis for calculating the dynamic oil-electric conversion value.

[0052] In another embodiment of this application, determining the test oil-to-electric conversion value based on the average rotational speed of the range extender and the average power generation of the range extender includes: S31: Determine the test oil-to-electric conversion value based on the range extender's average speed, the range extender's power generation, and the target mapping relationship, wherein the target mapping relationship is used to indicate the mapping relationship between the range extender's speed, the range extender's power generation, and the oil-to-electric conversion value.

[0053] In this embodiment, the target mapping relationship is a pre-tested mapping relationship used to indicate the mapping relationship between the range extender speed, the range extender power generation, and the oil-to-electricity conversion value.

[0054] In this embodiment, when determining the test oil-to-electric conversion value, based on the currently calculated average speed and average power generation, the oil-to-electric conversion value corresponding to the average speed and average power generation of the range extender is determined from the target mapping relationship of the range extender speed, power generation, and oil-to-electric conversion value obtained through pre-testing. This corresponding oil-to-electric conversion value is then determined as the test oil-to-electric conversion value. The test oil-to-electric conversion value can be refreshed according to a first fixed period, which can be set according to actual needs.

[0055] For example, with an average speed of 1500 rpm and an average power generation of 5 kW, the corresponding oil-to-electric conversion value found in the corresponding table is 3.1, which is used as the test oil-to-electric conversion value. The first fixed cycle includes, but is not limited to, 1 minute, and the test oil-to-electric conversion value needs to be refreshed every 1 minute of operation of the range extender.

[0056] In this embodiment, the test oil-electric conversion value is determined by the mapping relationship obtained through pre-testing, which serves as an important component of the dynamic oil-electric conversion value.

[0057] In another embodiment of this application, the step of obtaining the target mapping relationship includes: S41: Set up a two-dimensional test matrix, where each point of the two-dimensional test matrix represents the rotational speed of the vehicle's range extender and the power generation of the range extender.

[0058] In this embodiment, a two-dimensional test matrix is ​​set up, where each point in the test matrix represents the rotational speed of the vehicle's range extender and the corresponding power generation.

[0059] For example, the speeds are 1000, 1500, 2000, 2500, 3000, 3500, and 4000 rpm.

[0060] Examples of power generation capacities: 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 kW.

[0061] By combining these speeds and power generation, a matrix of 7*10=70 test points is obtained.

[0062] S42: Test the vehicle according to the points in the two-dimensional test matrix. If the parameter fluctuation of the range extender is less than the preset parameter fluctuation threshold, record the range extender speed, the power generation and the oil-electric conversion value to obtain the target mapping relationship.

[0063] In this embodiment, the vehicle is tested according to each point in the two-dimensional test matrix. When the parameter fluctuation of the range extender is less than the preset parameter fluctuation threshold, the current range extender speed, power generation and oil-electric conversion value are recorded to obtain the target mapping relationship.

[0064] For example, at each test point, it is necessary to wait for the system to stabilize and observe that the fluctuations in parameters such as power generation and fuel consumption are less than ±2%. Then, record the range extender speed n, power generation w, and fuel-to-electricity conversion value. The obtained target mapping relationship can be stored in a mapping relationship table, in which the correspondence between the range extender speed, range extender power generation, and fuel-to-electricity conversion value can be quickly found.

[0065] refer to Figure 2 , Figure 2This is a schematic diagram of a test bench for a range extender system according to an embodiment of this application, as shown below. Figure 2 As shown, the range extender system test bench includes components such as the range extender system, measurement and control system, fuel supply system, fuel flow meter, and electronic load. Different speeds and power generation are tested on this test bench to obtain the corresponding oil-to-electricity conversion coefficient.

[0066] In another embodiment of this application, determining the historical fuel-electric conversion value and the instantaneous fuel-electric conversion value based on the fuel injection quantity and power generation of the range extender of the vehicle includes: S51: Determine the first cumulative power generation within the second historical period based on the range extender's power generation during the second historical period.

[0067] In this embodiment, the fuel injection quantity and power generation of the vehicle's range extender are collected every second preset time period.

[0068] In this embodiment, the range extender's power output is collected every second preset time period during the second historical time period, and the first cumulative power output during the second historical time period is determined based on the range extender's power output during the second historical time period.

[0069] For example, the second preset time period includes, but is not limited to, 1 second, and the range extender power X is collected every 1 second. The second historical time period includes, but is not limited to, the past 60 minutes to the present time. The cumulative power generation from the past 60 minutes to the present time is Qhistory = (X1 + X2 + X3 ... + X3600) / 3600.

[0070] S52: Determine the first engine fuel consumption within the second historical time period based on the range extender fuel injection quantity during the second historical time period: In this embodiment, the range extender fuel injection quantity is collected once every second preset time period during the second historical time period, and the first engine fuel consumption during the second historical time period is determined based on the range extender fuel injection quantity during the second historical time period.

[0071] For example, the second preset time period includes, but is not limited to, 1 second, and the range extender fuel injection quantity L is collected every 1 second. The second historical time period includes, but is not limited to, the past 60 minutes to the present moment. The engine fuel consumption from the past 60 minutes to the present moment is Lhistory = (L1 + L2 + L3 ... + L3600) / 3600.

[0072] S53: Determine the historical fuel-electricity conversion value based on the first cumulative power generation and the first engine fuel consumption.

[0073] In this embodiment, the historical fuel-to-electricity conversion value is determined by calculating the first cumulative power generation and the first engine fuel consumption. The historical average fuel-to-electricity conversion value can be refreshed according to a second fixed period, which can be set according to actual needs.

[0074] For example, the historical average fuel-electric conversion value ηhistory = Qhistory / Lhistory. The second fixed period is not limited to 10 minutes, and the historical average fuel-electric conversion value needs to be refreshed every 10 minutes of operation of the range extender.

[0075] In another embodiment of this application, the target time period includes a third historical time period, and the instantaneous fuel-electric conversion value is determined based on the fuel injection quantity and power generation of the range extender of the vehicle, including: S61: Determine the second cumulative power generation within the third historical period based on the range extender's power generation during the third historical period.

[0076] In this embodiment, during the third historical time period, the range extender's power generation is collected every third preset time period. Based on the range extender's power generation during the third historical time period, the vehicle's second cumulative power generation during the third historical time period is determined.

[0077] For example, the third preset time period includes, but is not limited to, 1 second, and the range extender power generation is collected every 1 second. The third historical time period includes, but is not limited to, the past 1 minute to the current moment, and the cumulative power generation of the range extender of the vehicle in the past 1 minute is recorded as Qinstant=(X1+X2+X3…+X60) / 60.

[0078] S62: Determine the fuel consumption of the second engine during the third historical time period based on the fuel injection quantity of the range extender during the third historical time period.

[0079] In this embodiment, during the third historical time period, the fuel injection quantity of the range extender is collected every third preset time period. Based on the fuel injection quantity of the range extender during the third historical time period, the fuel consumption of the generator of the vehicle during the third historical time period is determined.

[0080] For example, the three preset time periods include, but are not limited to, 1 second, and the fuel injection amount of the range extender is collected every 1 second. The third historical time period includes, but is not limited to, the past 1 minute to the current moment, and the cumulative engine fuel consumption of the vehicle in the past 1 minute is recorded as Qinstant=(L1+L2+L3…+L60) / 60.

[0081] S63: Determine the instantaneous oil-to-electricity conversion value based on the second cumulative power generation and the second engine fuel consumption.

[0082] In this embodiment, after determining the second cumulative power generation and the second engine fuel consumption, the instantaneous average fuel-electric conversion value, i.e., the instantaneous fuel-electric conversion value, is calculated. The instantaneous fuel-electric conversion value can be refreshed according to a third fixed period, which can be preset.

[0083] For example, the instantaneous average oil-electric conversion value ηinstant = Qinstant / Linstant, and the instantaneous average oil-electric conversion value needs to be refreshed every 1 minute of operation of the range extender.

[0084] In this embodiment, the instantaneous average fuel-electric conversion value is determined by collecting the fuel injection quantity and power generation efficiency of the range extender, providing a basis for determining the dynamic fuel-electric conversion value.

[0085] In another embodiment of this application, determining the target oil-electric conversion value based on the tested oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value includes: S71: Obtain the historical weighting coefficient corresponding to the test oil-electric conversion value, the second weighting coefficient corresponding to the instantaneous oil-electric conversion value, and the third weighting coefficient corresponding to the instantaneous oil-electric conversion value.

[0086] In this embodiment, the first weighting coefficient, the second weighting coefficient, and the third weighting coefficient are weighting coefficients obtained in advance through testing, and are used to perform a weighted summation of the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value.

[0087] In this embodiment, when calculating the weighting coefficients, the average oil-to-electric conversion value, instantaneous oil-to-electric conversion value, historical oil-to-electric conversion value, and test oil-to-electric conversion value are first obtained through pre-testing. A system of equations is established based on the relationship between these oil-to-electric conversion values, and then the system of equations is solved to obtain the respective weighting coefficients.

[0088] For example, complete 30 cycles of the real vehicle CLTC (China Light-Duty Vehicle Test Cycle) test, and record the data for the first 15 cycles and the first 30 cycles respectively (the number of test cycles can be preset, including but not limited to 15 and 30), and obtain the following table.

[0089] Table 1

[0090] Based on the data in this table, the following equations can be obtained regarding α, β, and γ. 3.14 = 3 × α + 3.2 × β + 3.4 × γ 3.27 = 3.1 × α + 3.4 × β + 3.5 × γ α+β+γ=1 The calculated values ​​are α=0.5, β=0.3, and γ=0.2.

[0091] S62: The test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value are weighted and summed according to the first weighting coefficient, the second weighting coefficient, and the third weighting coefficient to obtain the target oil-electric conversion value.

[0092] In this embodiment, after obtaining the first weighting coefficient, the second weighting coefficient, and the third weighting coefficient, the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value are weighted and summed using these weighting coefficients to obtain the target oil-electric conversion value.

[0093] For example, η_dynamic = 0.5 × η_instant + 0.3 × η_history + 0.2 × η_model.

[0094] Where η_dynamic is the target oil-electric conversion value, η_instant is the instantaneous oil-electric conversion value, η_history is the historical oil-electric conversion value, and η_model is the test oil-electric conversion value.

[0095] In this embodiment, a dynamic fuel-electric conversion value is obtained by weighted summing of the instantaneous average fuel-electric conversion value, the historical average fuel-electric conversion value, and the test fuel-electric conversion value. This dynamic fuel-electric conversion value can accurately reflect the current status of the vehicle's range extender, which is beneficial for accurately calculating the remaining driving range.

[0096] In another embodiment of this application, determining the remaining driving range of the vehicle based on the target oil-to-electric conversion value includes: S81: Obtain the remaining fuel and average power consumption of the vehicle under operating conditions.

[0097] In this embodiment, when calculating the vehicle's remaining driving range, the remaining fuel level is first obtained from the vehicle's fuel gauge, which displays the actual remaining fuel level in the vehicle's fuel tank.

[0098] In this embodiment, the average power consumption under operating conditions is obtained from the vehicle bench test and is measured by a professional laboratory in a controlled environment, representing the average power consumption of the vehicle per 100 kilometers.

[0099] In this embodiment, after the average power consumption under operating conditions is obtained through pre-testing, it is stored in the vehicle's memory. When calculating the driving range, the recorded average power consumption under operating conditions can be directly retrieved from the memory.

[0100] For example, with the vehicle half-loaded and passing the CLTC test, the initial SOC exceeds 90% (Initial SOC (State of Charge) refers to the percentage of battery charge remaining in an electric vehicle at a specific initial moment, which is a key benchmark parameter for the Battery Management System (BMS) to perform energy prediction, charging control, and operating condition testing), ensuring that the test is completed in pure electric mode throughout the entire process.

[0101] S82: Determine the remaining driving range based on the remaining fuel, the average power consumption under operating conditions, and the target fuel-to-electricity conversion value.

[0102] In this embodiment, after obtaining the remaining fuel, average power consumption under operating conditions, and target fuel-to-electricity conversion value, the remaining driving range of the vehicle is determined based on these three data points.

[0103] For example, remaining driving range = remaining fuel × η_dynamic (target fuel-to-electric conversion value) / average power consumption under operating conditions.

[0104] In this embodiment, the remaining driving range is predicted based on the dynamic oil-electric conversion value, thus achieving an accurate estimate of the vehicle's remaining driving range.

[0105] In the above embodiments of this application, by collecting the fuel injection quantity, power generation, and speed of the range extender, the test fuel-electric conversion value, the historical average fuel-electric conversion value, and the instantaneous average fuel-electric conversion value are obtained. Then, these fuel-electric conversion values ​​are weighted and summed to obtain the dynamic fuel-electric conversion value. This dynamic fuel-electric conversion value can accurately reflect the current operating status of the range extender, thereby more accurately predicting the remaining driving range of the vehicle and improving the driver's driving experience.

[0106] It should be noted that the range estimation method for range-extended vehicles provided in this application embodiment can be executed by a range-extended vehicle range estimation device, or a control module within that range-extended vehicle range estimation device for executing the range estimation method for loading the range-extended vehicle. This application embodiment uses the execution of the range estimation method for loading the range-extended vehicle by a range-extended vehicle range estimation device as an example to illustrate the range estimation method for range-extended vehicles provided in this application embodiment.

[0107] refer to Figure 3 , Figure 3 This is a schematic diagram of a range-extended vehicle range estimation device 400 according to an embodiment of this application, as shown below. Figure 3 As shown, the device includes: Data acquisition module 301 is used to acquire the range extender speed, range extender power generation and range extender fuel injection quantity of the vehicle within a target time period; The test oil-electric conversion value determination module 302 is used to determine the test oil-electric conversion value based on the range extender speed and the range extender power generation of the vehicle. The instantaneous oil-electric conversion value determination module 303 is used to determine the historical oil-electric conversion value and the instantaneous oil-electric conversion value based on the fuel injection quantity of the range extender and the power generation of the range extender of the vehicle. The target oil-electric conversion value determination module 304 is used to determine the target oil-electric conversion value based on the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value. The driving range estimation module 305 is used to determine the remaining driving range of the vehicle based on the target oil-electric conversion value.

[0108] Optionally, the test oil-to-electricity conversion value determination module includes: The first data acquisition submodule is used to obtain the average speed of the range extender and the average power generation of the range extender during the first historical time period. The test oil-to-electric conversion value determination submodule is used to determine the test oil-to-electric conversion value based on the average speed of the range extender and the average power generation of the range extender.

[0109] Optionally, the test oil-to-electricity conversion value determination submodule includes: The oil-to-electric conversion value lookup submodule is used to determine the test oil-to-electric conversion value based on the average speed of the range extender, the power generation of the range extender, and the target mapping relationship, wherein the target mapping relationship is used to indicate the mapping relationship between the range extender speed, the range extender power generation, and the oil-to-electric conversion value.

[0110] Optionally, the step of obtaining the target mapping relationship includes: A two-dimensional test matrix is ​​set up, where each point of the two-dimensional test matrix represents the rotational speed of the vehicle's range extender and the power generation of the range extender; The vehicle is tested according to the points in the two-dimensional test matrix. When the parameter fluctuation of the range extender is less than the preset parameter fluctuation threshold, the range extender speed, the power generation and the oil-electric conversion value are recorded to obtain the target mapping relationship.

[0111] Optionally, the instantaneous oil-to-electricity conversion value determination module includes: The second data acquisition submodule is used to determine the first cumulative power generation in the second historical time period based on the power generation of the range extender in the second historical time period. The historical oil-to-electricity conversion value determination submodule is used to determine the historical oil-to-electricity conversion value based on the first cumulative power generation and the first engine fuel consumption. Optionally, the instantaneous oil-to-electricity conversion value determination module includes: The third data determination submodule is used to determine the second cumulative power generation within the third historical time period based on the range extender's power generation during the third historical time period. The fourth data determination submodule is used to determine the fuel consumption of the second engine in the third historical time period based on the fuel injection quantity of the range extender in the third historical time period. The instantaneous oil-to-electricity conversion value determination submodule is used to determine the instantaneous oil-to-electricity conversion value based on the second cumulative power generation and the second engine fuel consumption.

[0112] Optionally, the target oil-to-electricity conversion value determination module includes: The weighting coefficient determination submodule is used to determine, based on the average fuel-electric conversion value, instantaneous fuel-electric conversion value, historical fuel-electric conversion value, and test fuel-electric conversion value of the vehicle obtained from pre-tests, a first weighting coefficient corresponding to the test fuel-electric conversion value, a second weighting coefficient corresponding to the historical fuel-electric conversion value, and a third weighting coefficient corresponding to the instantaneous fuel-electric conversion value. The weighted summation submodule is used to perform a weighted summation of the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value based on the first weighting coefficient, the second weighting coefficient, and the third weighting coefficient to obtain the target oil-electric conversion value.

[0113] Optionally, the range estimation module includes: The remaining fuel level determination submodule is used to obtain the remaining fuel level of the vehicle from the vehicle's fuel level gauge. The average power consumption under operating conditions determination submodule is used to obtain the pre-tested average power consumption under operating conditions from the vehicle's memory. The remaining driving range determination submodule is used to determine the remaining driving range based on the remaining fuel, the average power consumption under operating conditions, and the target fuel-to-electricity conversion value.

[0114] The range estimation device for range-extended vehicles in this application embodiment can be a device, or a component, integrated circuit, or chip in a terminal. The device can be a mobile electronic device or a non-mobile electronic device. For example, mobile electronic devices can be mobile phones, tablets, laptops, PDAs, in-vehicle electronic devices, wearable devices, ultra-mobile personal computers (UMPCs), netbooks, or personal digital assistants (PDAs), etc., while non-mobile electronic devices can be servers, network-attached storage (NAS), personal computers (PCs), televisions (TVs), ATMs, or self-service machines, etc. This application embodiment does not impose specific limitations.

[0115] The range estimation device for range-extended vehicles in this application embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this application embodiment does not specifically limit it.

[0116] The range estimation device for range-extended vehicles provided in this application embodiment can achieve... Figures 1 to 2 The various processes implemented by the range-extended vehicle range estimation device in the method embodiment will not be described again here to avoid repetition.

[0117] Optionally, this application embodiment also provides an electronic device, including a processor 110, a memory 109, and a program or instructions stored in the memory 109 and executable on the processor 110. When the program or instructions are executed by the processor 110, they implement the various processes of the above-described range-extended vehicle range estimation method embodiment and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0118] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0119] Figure 4 This is a schematic diagram of the hardware structure of an electronic device proposed in an embodiment of this application. The electronic device 100 includes, but is not limited to, components such as: radio frequency unit 101, network module 102, audio output unit 103, input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, and processor 110.

[0120] Those skilled in the art will understand that the electronic device 100 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 110 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 4 The electronic device structure shown does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here. This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described range-extended vehicle range estimation method embodiments and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0121] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0122] This application embodiment also provides a chip, which includes a processor and a communication interface. The communication interface and the processor are coupled. The processor is used to run programs or instructions to implement the various processes of the above-described range-extended vehicle range estimation method embodiment, and can achieve the same technical effect. To avoid repetition, it will not be described again here.

[0123] It should be understood that the chip mentioned in the embodiments of this application may also be referred to as a system-on-a-chip, system chip, chip system, or system-on-a-chip, etc.

[0124] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0125] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0126] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for predicting the range of a range-extended vehicle, characterized in that, The method includes: Obtain the range extender speed, range extender power generation, and range extender fuel injection quantity of the vehicle within the target time period; The test oil-to-electric conversion value is determined based on the range extender speed and the range extender power generation. Historical fuel-electric conversion values ​​and instantaneous fuel-electric conversion values ​​are determined based on the fuel injection quantity of the range extender and the power generation of the range extender. The target oil-electric conversion value is determined based on the tested oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value. The remaining driving range of the vehicle is determined based on the target oil-to-electric conversion value.

2. The range estimation method for range-extended vehicles according to claim 1, characterized in that, The target time period includes a first historical time period, and determining the test oil-to-electric conversion value based on the range extender speed and the range extender power generation includes: Obtain the average rotational speed and average power generation of the range extender during the first historical time period. The test oil-to-electric conversion value is determined based on the average rotational speed of the range extender and the average power generation of the range extender.

3. The range estimation method for range-extended vehicles according to claim 2, characterized in that, The step of determining the test oil-to-electric conversion value based on the average rotational speed of the range extender and the average power generation of the range extender includes: The test oil-to-electric conversion value is determined based on the range extender's average speed, the range extender's power generation, and the target mapping relationship, wherein the target mapping relationship is used to indicate the mapping relationship between the range extender's speed, the range extender's power generation, and the oil-to-electric conversion value.

4. The range estimation method for range-extended vehicles according to claim 3, characterized in that, The steps for obtaining the target mapping relationship include: A two-dimensional test matrix is ​​set up, where each point of the two-dimensional test matrix represents the rotational speed of the vehicle's range extender and the power generation of the range extender; The vehicle is tested according to the points in the two-dimensional test matrix. When the parameter fluctuation of the range extender is less than the preset parameter fluctuation threshold, the range extender speed, the power generation and the oil-electric conversion value are recorded to obtain the target mapping relationship.

5. The range estimation method for range-extended vehicles according to claim 1, characterized in that, The target time period includes a second historical time period, and historical fuel-to-electricity conversion values ​​are determined based on the fuel injection quantity and power generation of the vehicle's range extender, including: Based on the range extender's power generation during the second historical period, determine the first cumulative power generation during the second historical period. The fuel consumption of the first engine during the second historical time period is determined based on the fuel injection quantity of the range extender during the second historical time period. The historical fuel-to-electricity conversion value is determined based on the first cumulative power generation and the first engine fuel consumption.

6. The range estimation method for range-extended vehicles according to claim 1, characterized in that, The target time period includes a third historical time period, and the instantaneous fuel-to-electricity conversion value is determined based on the fuel injection quantity and power generation of the vehicle's range extender, including: Based on the range extender's power generation during the third historical period, determine the second cumulative power generation during the third historical period. The fuel consumption of the second engine during the third historical time period is determined based on the fuel injection quantity of the range extender during the third historical time period. The instantaneous oil-to-electricity conversion value is determined based on the second cumulative power generation and the second engine fuel consumption.

7. The range estimation method for range-extended vehicles according to claim 1, characterized in that, The step of determining the target oil-electric conversion value based on the tested oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value includes: Obtain the historical weighting coefficient corresponding to the test oil-electric conversion value, the second weighting coefficient corresponding to the instantaneous oil-electric conversion value, and the third weighting coefficient corresponding to the instantaneous oil-electric conversion value; The target oil-electric conversion value is obtained by weighting and summing the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value according to the first weighting coefficient, the second weighting coefficient, and the third weighting coefficient.

8. The range estimation method for range-extended vehicles according to claim 1, characterized in that, Determining the vehicle's remaining driving range based on the target hybrid conversion value includes: Obtain the remaining fuel level and average power consumption of the vehicle under operating conditions; The remaining driving range is determined based on the remaining fuel, the average power consumption under operating conditions, and the target fuel-to-electricity conversion value.

9. A prediction device for a range-extended vehicle, characterized in that, The device includes: The test oil-electric conversion value determination module is used to determine the test oil-electric conversion value based on the range extender speed and range extender power generation of the vehicle. The instantaneous fuel-electric conversion value determination module is used to determine the historical fuel-electric conversion value and the instantaneous fuel-electric conversion value based on the fuel injection quantity and power generation of the range extender of the vehicle. The target oil-electric conversion value determination module is used to determine the target oil-electric conversion value based on the test oil-electric conversion value, the historical oil-electric conversion value, and the instantaneous oil-electric conversion value. The driving range estimation module is used to determine the remaining driving range of the vehicle based on the target oil-electric conversion value.

10. An electronic device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of any of the methods described in claims 1-8.

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