A method and device for determining equivalent specific fuel consumption of a hybrid vehicle

Abstract

The present invention discloses a method and device for determining the equivalent specific fuel consumption of a hybrid vehicle, wherein the method comprises: obtaining a plurality of vehicle speed torque points and a plurality of speed torque points; wherein each vehicle speed torque point corresponds to a vehicle speed and a wheel-side torque; each speed torque point corresponds to an engine speed and an engine torque; for any vehicle speed torque point and any speed torque point, based on the vehicle speed torque point and the speed torque point, determining the engine power, wheel-side demand power, battery drive power in the electric drive stage, and total charging power in the charging stage under preset working conditions; based on the engine power, battery drive power, total charging power, and wheel-side demand power, obtaining the equivalent specific fuel consumption of the vehicle. The equivalent specific fuel consumption obtained by the present invention can provide a reference for the initial simulation of fuel consumption, improve the accuracy of subsequent fuel consumption simulation, and also provide a reference for determining the gear shift map of the vehicle.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a method, a device and an electronic device for determining equivalent specific fuel consumption of a hybrid vehicle. Background Art

[0002] The current hybrid powertrain architecture of new energy vehicles will provide a variety of modes and gear options. However, before determining the working mode and gear selection, it is necessary to determine the highest conversion efficiency under the ECVT (Electronic Continuously Variable Transmission) mode, that is, the lowest equivalent specific fuel consumption, and then compare it with the equivalent specific fuel consumption of the vehicle's parallel direct drive mode, so as to determine the working conditions for selecting the ECVT mode and changing the driving gear. However, at present, in the early stages of vehicle fuel consumption simulation, there is a lack of relevant data, and it is impossible to obtain a more accurate equivalent specific fuel consumption or shift map under the ECVT mode, resulting in unsatisfactory subsequent simulation results. Summary of the invention

[0003] In view of the above problems, the present invention proposes a method and device for determining the equivalent specific fuel consumption of a hybrid vehicle, which is beneficial to providing a more accurate equivalent specific fuel consumption in the early stage of simulation of a hybrid vehicle, providing a reference for the early stage of fuel consumption simulation, improving the accuracy of subsequent fuel consumption simulation, and also providing a reference for determining the vehicle's shift map.

[0004] In the first aspect, the present application provides the following technical solution through an embodiment:

[0005] A method for determining equivalent specific fuel consumption of a hybrid vehicle, the hybrid vehicle comprising a hybrid powertrain architecture, the method comprising:

[0006] Acquire multiple vehicle speed torque points and multiple speed torque points; wherein each of the vehicle speed torque points corresponds to a vehicle speed and a wheel-side torque; each of the speed torque points corresponds to an engine speed and an engine torque; for any of the vehicle speed torque points and any of the speed torque points, determine the engine power, wheel-side demand power, battery drive power in the electric drive stage and total charging power in the charging stage under preset working conditions based on the vehicle speed torque point and the speed torque point; the preset working conditions are to control the vehicle to first work in the charging stage and then switch to the electric drive stage, with the battery power before and after work unchanged; based on the engine power, the battery drive power, the total charging power and the wheel-side demand power, obtain the equivalent specific fuel consumption of the vehicle.

[0007] Optionally, the obtaining of multiple vehicle speed torque points and multiple rotation speed torque points includes:

[0008] Define the vehicle speed range, wheel torque range, engine speed range and engine torque range of the vehicle; determine multiple vehicle speed torque points within the vehicle speed range and the wheel torque range; and determine multiple speed torque points within the engine speed range and the engine torque range.

[0009] Optionally, the vehicle speed range is 10km / h to 160km / h, the wheel torque range is 100N·m to 2600N·m, the engine speed range is 1000rpm to 5200rpm, and the engine torque range is 10N·m to 300N·m.

[0010] Optionally, within the vehicle speed range and the wheel torque range, a plurality of vehicle speed torque points are determined, including:

[0011] Within the vehicle speed range, the values ​​are taken from small to large or from large to small, and a vehicle speed is determined every time a preset interval vehicle speed is increased; within the wheel-side torque range, the values ​​are taken from small to large or from large to small, and a wheel-side torque is determined every time a preset wheel-side interval torque is increased; for each of the vehicle speeds, it is matched with a different wheel-side torque to obtain the multiple vehicle speed torque points.

[0012] Optionally, within the engine speed range and the engine torque range, determining a plurality of speed torque points includes:

[0013] Within the engine speed range, the values ​​are taken from small to large or from large to small, and a speed is determined each time a preset interval speed is increased; within the engine torque range, the values ​​are taken from small to large or from large to small, and an engine torque is determined each time a preset engine interval torque is increased; for each of the speeds, it is matched with a different engine torque to obtain the multiple speed torque points.

[0014] Optionally, obtaining the equivalent specific fuel consumption of the vehicle based on the engine power, the battery driving power, the total charging power and the wheel-side required power includes:

[0015] Based on f ECVT =P ENG_ECVT* ge*P Total_Drive_ECVT / (|P Total_CHarge_ECVT |+P Total_Drive_ECVT ) / P Wheel_ECVT , determine the equivalent specific fuel consumption of the vehicle; where f ECVT is the equivalent specific fuel consumption, P ENG_ECVT is the engine power, P Total_Drive_ECVT is the battery driving power, P Total_Charge_ECVT is the total charging power, P Wheel_ECVT The power required by the wheel side.

[0016] Optionally, the determining of the engine power, wheel-side demand power, battery drive power in the electric drive phase, and total charging power in the charging phase under preset working conditions based on the vehicle speed torque point and the speed torque point includes:

[0017] Based on the engine speed and engine torque corresponding to the speed torque point, the engine power in the charging stage is obtained; based on the wheel parameters of the vehicle and the vehicle speed and wheel torque corresponding to the vehicle speed torque point, the wheel demand power and the battery driving power in the electric drive stage are obtained; based on the speed ratio parameters of the vehicle, the engine torque corresponding to the speed torque point, the engine speed corresponding to the speed torque point, the wheel torque corresponding to the vehicle speed torque point and the vehicle speed corresponding to the vehicle speed torque point, the total charging power in the charging stage is determined.

[0018] Optionally, obtaining the engine power in the charging stage based on the engine speed and the engine torque corresponding to the speed torque point includes:

[0019] Based on P ENG_ECVT =T ENG_ECVT *n ENG_ECVT / 9550, determine the engine power; wherein, P ENG_ECVT is the engine power during the charging phase, T ENG_ECVT is the engine torque corresponding to the speed torque point in the charging phase, n ENG_ECVT is the engine speed corresponding to the speed torque point during the charging phase.

[0020] Optionally, obtaining the wheel side required power and the battery driving power in the electric drive stage based on the wheel parameters of the vehicle and the vehicle speed and wheel side torque corresponding to the vehicle speed torque point includes:

[0021] Based on P Wheel_ECVT =P Wheel =T Wheel* n Wheel / 9550, determine the wheel side required power; where P Wheel_ECVT is the wheel side power requirement during the charging phase, P Wheel is the wheel side power requirement, T Wheel is the wheel torque, n Wheel is the wheel speed; based on P Total_Drive_ECVT =P Wheel_ECVT / η / η TM_Drive / 0.95, determine the battery driving power in the electric drive stage; where P Total_Drive_ECVT is the battery driving power in the electric drive stage, η is the system driving efficiency, η TM_Drive It is the P3 motor drive efficiency; during the electric drive stage, only the P3 motor of the hybrid powertrain architecture works.

[0022] Optionally, the hybrid powertrain architecture includes a P1 motor and a P3 motor; the determining the total charging power in the charging stage based on the speed ratio parameter of the vehicle, the engine torque corresponding to the speed torque point, the engine speed corresponding to the speed torque point, the wheel torque corresponding to the vehicle speed torque point, and the vehicle speed corresponding to the vehicle speed torque point includes:

[0023] Based on the vehicle speed, the speed ratio parameter, the engine speed and the engine torque, the P1 motor charging power of the P1 motor is determined; based on the vehicle speed, the speed ratio parameter, the engine torque and the wheel-side torque, the P3 motor charging power of the P3 motor is determined; based on the P1 motor charging power and the P3 motor charging power, the total charging power in the charging stage is determined.

[0024] Optionally, the speed ratio parameter includes a first speed ratio, a second speed ratio, and a third speed ratio; and determining the P1 motor charging power of the P1 motor based on the vehicle speed, the speed ratio parameter, the engine speed, and the engine torque includes:

[0025] Optionally, the speed ratio parameter includes a first speed ratio, a second speed ratio, and a third speed ratio; and determining the P1 motor charging power of the P1 motor based on the vehicle speed, the speed ratio parameter, the engine speed, and the engine torque includes:

[0026] Based on the vehicle speed, wheel parameters and the first speed ratio, the ring gear speed of the assembly architecture in the charging stage is determined; wherein the first speed ratio is the speed ratio between the engine and the wheel; based on the ring gear speed, the engine speed, the second speed ratio and the third speed ratio, the P1 motor speed is determined; wherein the second speed ratio is the speed ratio between the P1 motor and the engine, and the third speed ratio is the ratio of the number of teeth of the ring gear to the sun gear of the assembly architecture; based on the engine torque and the second speed ratio, the P1 motor torque is determined; based on the P1 motor speed and the P1 motor torque, the P1 motor power is determined; based on the P1 motor power, the P1 motor charging power is determined.

[0027] Optionally, determining the P1 motor charging power of the P1 motor based on the vehicle speed, the speed ratio parameter, the engine speed, and the engine torque includes:

[0028] Based on n R_ECVT =c*v / 0.377 / r, determine the gear ring speed; where n R_ECVT is the ring gear speed, c is the first speed ratio, v is the vehicle speed, r is the wheel radius corresponding to the vehicle speed torque point; based on n P1_ECVT =a*n ENG_ECVT -b*n R_ECVT, determine the P1 motor speed; where n P1_ECVT is the P1 motor speed, n ENG_ECVT is the engine speed, a is the second speed ratio, b is the third speed ratio; based on T P1_ECVT =-1*T ENG_ECVT / a, determine the P1 motor torque; where T P1_ECVT is the P1 motor torque, T ENG_ECVT is the engine torque; based on P P1_ECVT =T P1_ECVT *n P1_ECVT / 9550, determine the P1 motor power; wherein, P P1_ECVT P1 is the motor power; based on P P1_Charge_ECVT =P P1_ECVT *η GEN_Generate , determine the P1 motor charging power; where P P1_Charge_ECVT is the charging power of P1 motor, η GEN_Generate The P1 motor charging efficiency is the P1 motor.

[0029] Optionally, the speed ratio parameter includes a first speed ratio, a second speed ratio, a third speed ratio and a fourth speed ratio; and determining the P3 motor charging power of the P3 motor based on the vehicle speed, the speed ratio parameter, the engine torque and the wheel torque includes:

[0030] Based on the vehicle speed, wheel parameters and the fourth speed ratio, the P3 motor speed is determined; wherein the fourth speed ratio is the speed ratio between the P3 motor speed and the wheel; based on the engine torque, the second speed ratio and the third speed ratio, the ring gear torque of the ring gear is determined; wherein the second speed ratio is the speed ratio between the P1 motor and the engine, and the third speed ratio is the speed ratio between the P1 motor and the ring gear; based on the ring gear torque, the wheel-side torque, the first speed ratio and the fourth speed ratio, the P3 motor torque is determined; wherein the first speed ratio is the speed ratio between the engine and the wheel; based on the P3 motor speed and the P3 motor torque, the P3 motor power is determined; based on the P3 motor power, the P3 motor charging power is determined.

[0031] Optionally, determining the P3 motor charging power of the P3 motor based on the vehicle speed, the speed ratio parameter, the engine torque and the wheel torque includes:

[0032] Based on n P3_ECVT =d*v / 0.377 / r, determine the P3 motor speed; where n P3_ECVT is the P3 motor speed, d is the fourth speed ratio, v is the vehicle speed, and r is the wheel radius corresponding to the vehicle speed torque point; based on T R_ECVT =b / a*T ENG_ECVT , determine the ring gear torque; where TR_ECVT is the ring gear torque, T ENG_ECVT is the engine torque, a is the second speed ratio, b is the third speed ratio; based on T P3_ECVT =(T Wheel_ECVT -c*T R_ECVT ) / d, determine the P3 motor torque; wherein, T P3_ECVT is the torque of the P3 motor, c is the first speed ratio, T Wheel_ECVT is the wheel torque; based on P P3_ECVT =T P3_ECVT *n P3_ECVT / 9550, determine the P3 motor power; wherein, P P3_ECVT P3 motor power; based on P P3_Charge_ECVT =P P3_ECVT *η TM_Generate , determine the charging power of the P3 motor; where P P3_Charge_ECVT The charging power of P3 motor, η TM_Generate P3 motor charging efficiency for P3 motor.

[0033] Optionally, before determining the total charging power in the charging stage based on the P1 motor charging power and the P3 motor charging power, the method further includes:

[0034] Obtain the P1 motor torque, P1 motor speed, P1 motor power, P3 motor torque, P3 motor speed, P3 motor power and engine torque; determine whether the P1 motor torque, the P1 motor speed, the P1 motor power, the P3 motor torque, the P3 motor speed, the P3 motor power and the engine torque all meet their respective preset range conditions; if so, execute the step of determining the total charging power in the charging stage based on the P1 motor charging power and the P3 motor charging power.

[0035] Optionally, determining the total charging power in the charging stage based on the P1 motor charging power and the P3 motor charging power includes:

[0036] Obtain the sum of the P1 motor charging power and the P3 motor charging power; determine whether the sum of the powers is greater than 0; if the sum of the powers is greater than 0, determine that the preset working condition is met; based on the sum of the powers, determine the total charging power.

[0037] In the second aspect, based on the same inventive concept, the present application provides the following technical solution through an embodiment:

[0038] An equivalent specific fuel consumption determination device for a hybrid vehicle, the hybrid vehicle comprising a hybrid powertrain architecture, the device comprising:

[0039] An initial parameter acquisition module is used to acquire multiple vehicle speed torque points and multiple speed torque points; wherein each of the vehicle speed torque points corresponds to a vehicle speed and a wheel-side torque; each of the speed torque points corresponds to an engine speed and an engine torque; a power determination module is used to determine, for any of the vehicle speed torque points and any of the speed torque points, the engine power, the wheel-side demand power, the battery drive power in the electric drive stage, and the total charging power in the charging stage under preset working conditions based on the vehicle speed torque point and the speed torque point; the preset working condition is to control the vehicle to first work in the charging stage and then switch to the electric drive stage, and the battery power before and after the work remains unchanged; an equivalent specific fuel consumption acquisition module is used to obtain the equivalent specific fuel consumption of the vehicle based on the engine power, the battery drive power, the total charging power and the wheel-side demand power.

[0040] In the third aspect, based on the same inventive concept, the present application provides the following technical solution through an embodiment:

[0041] An electronic device comprises a processor and a memory, wherein the memory is coupled to the processor and stores instructions, and when the instructions are executed by the processor, the electronic device executes the steps of any one of the methods described in the first aspect.

[0042] In an embodiment of the present invention, a method and device for determining the equivalent specific fuel consumption of a hybrid vehicle are provided, by obtaining multiple vehicle speed torque points and multiple speed torque points; each vehicle speed torque point corresponds to a vehicle speed and a wheel torque; each speed torque point corresponds to an engine speed and an engine torque; then, for any vehicle speed torque point and any speed torque point, based on the vehicle speed torque point and the speed torque point, the engine power, the wheel demand power, the battery drive power in the electric drive stage, and the total charging power in the charging stage under the preset working conditions are determined; the preset working condition is to control the vehicle to work in the charging stage first and then switch to the electric drive stage, and the battery power before and after the work remains unchanged; when the mode test is performed under the working condition, the battery power is ensured to be unchanged, so that the power output by the vehicle engine can be used to drive the vehicle forward after discharging the transmission efficiency or mechanical loss. Therefore, finally, based on the engine power, the battery drive power, the total charging power and the wheel demand power, the equivalent specific fuel consumption of the vehicle is obtained. The corresponding equivalent specific fuel consumption can be obtained for each combination of speed torque point and each vehicle speed torque point, so that the speed torque point and vehicle speed torque point with the lowest equivalent specific fuel consumption can be found more accurately. This can provide a reference for the initial stage of vehicle fuel consumption simulation, improve simulation efficiency and accuracy, and provide a reference for finding an economical gear shift map (MAP).

[0043] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0045] Figure 1 A flow chart showing a method for determining equivalent specific fuel consumption of a hybrid vehicle provided by a first embodiment of the present invention;

[0046] Figure 2 A schematic structural diagram of a hybrid vehicle equivalent specific fuel consumption determination device provided by a second embodiment of the present invention is shown. DETAILED DESCRIPTION

[0047] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0048] In the present invention, a hybrid vehicle is provided with a hybrid powertrain architecture, which is composed of an engine, a P1 motor, a P3 motor, a single planetary gear, a shift drum, etc. At present, hybrid vehicles have an ECVT mode, that is, a power split mode. During driving, hybrid vehicles can select different vehicle working modes or gears based on user needs or driving conditions. When selecting a working mode or a gear for vehicle driving, it is necessary to ensure the energy consumption economy of the vehicle driving; therefore, it is necessary to determine the equivalent specific fuel consumption in the ECVT mode to determine whether the shift is economical. Then, at present, there are no corresponding reference parameters in the early stage of vehicle fuel consumption simulation, and some empirical data settings are often used, resulting in inaccurate fuel consumption simulation results and low efficiency; thus, the reliability of the shift map is also affected. Based on this, this embodiment provides a method and device for determining the equivalent specific fuel consumption of a hybrid vehicle, which can determine a more accurate equivalent specific fuel consumption of the vehicle in the ECVT mode before the vehicle fuel consumption simulation is performed, and provide a reference for the initial stage of vehicle fuel consumption simulation and determination of the shift MAP. The overall concept of the present invention is described below through specific embodiments.

[0049] See also Figure 1 , shows a method for determining an equivalent specific fuel consumption of a hybrid vehicle provided by an embodiment of the present invention, the method for determining an equivalent specific fuel consumption of a hybrid vehicle comprising:

[0050] Step S10: acquiring a plurality of vehicle speed torque points and a plurality of rotation speed torque points; wherein each of the vehicle speed torque points corresponds to a vehicle speed and a wheel-side torque; and each of the rotation speed torque points corresponds to an engine speed and an engine torque;

[0051] Step S20: for any of the vehicle speed torque points and any of the speed torque points, based on the vehicle speed torque point and the speed torque point, determine the engine power, wheel side demand power, battery drive power in the electric drive stage and total charging power in the charging stage under a preset working condition; the preset working condition is to control the vehicle to work in the charging stage first and then switch to the electric drive stage, and the battery power before and after the work remains unchanged;

[0052] Step S30: Obtaining the equivalent specific fuel consumption of the vehicle based on the engine power, the battery driving power, the total charging power and the wheel-side required power.

[0053] In this embodiment, through steps S10-S30, the corresponding equivalent specific fuel consumption can be obtained for each combination of speed torque point and each vehicle speed torque point, so that the speed torque point and vehicle speed torque point with the lowest equivalent specific fuel consumption can be found more accurately, which can provide a reference for the initial stage of vehicle fuel consumption simulation, improve simulation efficiency and accuracy, and provide a reference for finding an economical gear shift map (MAP).

[0054] Step S10: Acquire multiple vehicle speed torque points and multiple rotation speed torque points; wherein each of the vehicle speed torque points corresponds to a vehicle speed and a wheel-side torque; and each of the rotation speed torque points corresponds to an engine speed and an engine torque.

[0055] In step S10, since the drive connection structure inside the hybrid powertrain is different in different driving modes, the equivalent fuel consumption is determined based on the vehicle speed, wheel torque, engine speed and engine torque, combined with the hardware characteristics of the hybrid powertrain architecture. It is not necessary to consider other actual driving parameters, thereby ensuring that the equivalent fuel consumption result has high reliability and good reference value.

[0056] In some implementations, the vehicle speed torque point and the speed torque point may be determined by:

[0057] First, the vehicle speed range, wheel torque range, engine speed range and engine torque range are defined; then, multiple vehicle speed torque points are determined within the vehicle speed range and wheel torque range; and multiple speed torque points are determined within the engine speed range and engine torque range.

[0058] Optionally, the vehicle speed range can be determined as 10km / h to 160km / h, the wheel torque range can be determined as 100N·m to 2600N·m, the engine speed range can be determined as 1000rpm to 5200rpm, and the engine torque range can be 10N·m to 300N·m. The above ranges can better cover the actual driving state of the vehicle. It should be noted that in some implementations, the above parameters can also be adjusted based on the type or configuration of the vehicle. For example, the vehicle speed range can be determined as 5km / h to 200km / h, the wheel torque range can be determined as 50N·m to 3000N·m, the engine speed range can be determined as 800rpm to 5400rpm, and the engine torque range can be 5N·m to 400N·m, without restriction.

[0059] Furthermore, within the speed range, the values ​​are taken from small to large or from large to small, and a vehicle speed is determined every time the preset interval speed is increased. For example, when the speed range is determined to be 10km / h to 160km / h, a speed point can be taken every 10km / h, and the interval speed is 10km / h; the vehicle speeds can also be obtained: 10km / h, 20km / h, 30km / h, 40km / h, ···, 150km / h, 160km / h. Similarly, within the wheel torque range, the values ​​can also be taken from small to large or from large to small, and a wheel torque is determined every time the preset wheel interval torque is increased. For example, when the wheel-side torque range is determined to be 100N·m to 2600N·m, a wheel-side torque point can be taken every 5N·m, and the wheel-side interval torque is 5N·m; that is, the wheel-side torques can be obtained: 100N·m, 105N·m, 110N·m, 115N·m,..., 2590N·m, 2595N·m, 2600N·m.

[0060] For each vehicle speed, it is matched with different wheel-side torques to obtain multiple vehicle speed torque points. It can be understood that each vehicle speed and each determined wheel-side torque arrangement combination is determined, and each combination is a vehicle speed torque point. For example, continuing with the above example, the vehicle speed torque points are: (10km / h, 100N·m), (10km / h, 105N·m), (10km / h, 110N·m), ..., (10km / h, 2595N·m), (10km / h, 2600N·m), (20km / h, 100N·m), (20km / h, 105N·m), ..., (160km / h, 100N·m), (160km / h, 105N·m), (160km / h, 110N·m), ..., (160km / h, 2595N·m), (160km / h, 2600N·m).

[0061] Similarly, the values ​​can be taken from small to large or from large to small within the engine speed range, and a speed can be determined every time a preset interval speed is increased; and the values ​​can be taken from small to large or from large to small within the engine torque range, and an engine torque can be determined every time a preset engine interval torque is increased. For example, when the interval speed is 100rpm, a speed point is taken every 100rpm within the engine speed range, thereby obtaining multiple speeds; when the engine torque interval is 5N·m, an engine torque point is taken every 5N·m within the engine torque range, thereby obtaining multiple engine torques.

[0062] Then, for each of the speeds, it is matched with different engine torques to obtain multiple speed torque points. It can be understood that each vehicle speed and each wheel torque arrangement combination is determined, and each combination is a vehicle speed torque point. The specific principle can be referred to the relevant description of the vehicle speed torque point mentioned above, which will not be repeated here.

[0063] It should be noted that in this embodiment, the interval vehicle speed can also be determined between 5km / h and 20km / h, such as 8km / h, 15km / h, etc.; the wheel side interval torque can also be determined between 3km / h and 10N·m, such as 4N·m, 8N·m, etc.; the interval speed can also be determined between 50rpm and 150rpm, such as 80rpm, 120rpm, etc.; the engine torque interval can also be determined between 3km / h and 10N·m, such as 4N·m, 8N·m, etc., without limitation. In this embodiment, if the determined point interval is too small, it is easy to cause too much data, but the accuracy improvement is limited; if the point interval is too large, it is easy to miss the best value point, resulting in the inability to determine the most economical equivalent fuel consumption. Therefore, in this embodiment, based on the characteristics of the vehicle's engine and ECVT mode, the interval vehicle speed is determined to be 10km / h, the wheel-side interval torque is determined to be 5N·m, the interval speed is determined to be 100rpm, and the engine torque interval is determined to be 5N·m, which can achieve a better balance between accuracy and calculation amount.

[0064] Step S20: For any of the vehicle speed torque points and any of the speed torque points, determine the engine power, wheel-side demand power, battery drive power in the electric drive stage and total charging power in the charging stage under preset working conditions based on the vehicle speed torque point and the speed torque point; the preset working conditions are to control the vehicle to first work in the charging stage and then switch to the electric drive stage, and the battery power before and after work remains unchanged.

[0065] In step S20, the above-mentioned permutation and combination between any vehicle speed torque point and any speed torque point indicates that each vehicle speed torque point and each speed torque point are permuted and combined, and each determined combination can be processed in steps S20 and S30. For example, there can be M×N combinations between M vehicle speed torque points and N speed torque points, and the processing of steps S20-S30 is performed for each of the M×N combinations. Further, step S30 is executed.

[0066] Based on the characteristic properties of the components used in the vehicle and the vehicle speed torque point and speed torque point obtained in the above steps, the parameters that can be determined and their definitions are as follows:

[0067] ECVT efficiency (system driving efficiency): η;

[0068] P1 motor drive efficiency: η GEN_Drive ;

[0069] P1 motor power generation efficiency: η GEN_Generate ;

[0070] P3 motor drive efficiency: η TM_Drive ;

[0071] P3 motor power generation efficiency: η TM_Generate ;

[0072] Vehicle speed: v;

[0073] The wheel radius corresponding to the vehicle speed torque point: r;

[0074] Wheel torque: T Wheel ;

[0075] Wheel speed: n Wheel =v / 0.377 / r;

[0076] Wheel side power requirement: P Wheel =T Wheel *n Wheel / 9550=T Wheel *v / r / 3600;

[0077] Wheel torque in ECVT mode (charging stage): T Wheel_ECVT =T Wheel ;

[0078] Wheel speed in ECVT mode: n Wheel_ECVT =n Wheel ;

[0079] Wheel power in ECVT mode: P Wheel_ECVT =P Wheel ;

[0080] Engine speed in ECVT mode: n ENG_ECVT ;

[0081] Engine torque in ECVT mode: T ENG_ECVT ;

[0082] First speed ratio: c, represents the speed ratio between the engine and the wheels;

[0083] The second speed ratio: a, represents the speed ratio between the P1 motor and the engine;

[0084] The third speed ratio: b, represents the ratio of the number of teeth of the ring gear (planetary gear ring) of the assembly structure to the number of teeth of the sun gear of the assembly structure;

[0085] The fourth speed ratio: d, represents the speed ratio between the P3 motor speed and the wheel.

[0086] Furthermore, step S20 may specifically include:

[0087] Step S21: Based on the engine speed and engine torque corresponding to the speed torque point, the engine power in the charging stage is obtained.

[0088] In step S21, it can be based on:

[0089] P ENG_ECVT =T ENG_ECVT *n ENG_ECVT / 9550 (1)

[0090] Determine the engine power; where P ENG_ECVT is the engine power during the charging phase, T ENG_ECVT is the engine torque corresponding to the speed torque point in the charging phase, n ENG_ECVT is the engine speed corresponding to the speed torque point during the charging phase.

[0091] Step S22: Based on the wheel parameters of the vehicle and the vehicle speed and wheel torque corresponding to the vehicle speed torque point, the wheel demand power and the battery driving power in the electric drive stage are obtained.

[0092] In step S22, based on:

[0093] P Wheel_ECVT =P Wheel =T Wheel *n Wheel / 9550 (2)

[0094] Determine the wheel side required power; where P Wheel_ECVT is the wheel side power required during the charging phase, P Wheel is the wheel side power requirement, T Wheel is the wheel torque, n Wheel is the wheel speed;

[0095] based on:

[0096] P Total_Drive_ECVT =P Wheel_ECVT / η / η TM_Drive / 0.95 (3)

[0097] Determine the battery driving power in the electric drive stage; wherein, P Total_Drive_ECVT is the battery driving power in the electric drive stage, η is the system driving efficiency, η TM_Drive It is the P3 motor drive efficiency; during the electric drive stage, only the P3 motor of the hybrid powertrain architecture works.

[0098] Step S23: Determine the total charging power during the charging phase based on the speed ratio parameters of the vehicle, the engine torque corresponding to the speed torque point, the engine speed corresponding to the speed torque point, the wheel torque corresponding to the vehicle speed torque point and the vehicle speed corresponding to the vehicle speed torque point.

[0099] In step S23, it includes:

[0100] Step S231: Determine the P1 motor charging power of the P1 motor based on the vehicle speed, the speed ratio parameter, the engine speed and the engine torque. This can be specifically implemented as follows:

[0101] Based on the vehicle speed, wheel parameters and the first speed ratio, the ring gear speed of the assembly architecture during the charging phase is determined; wherein the first speed ratio is the speed ratio between the engine and the wheel; based on the ring gear speed, the engine speed, the second speed ratio and the third speed ratio, the P1 motor speed is determined; wherein the second speed ratio is the speed ratio between the P1 motor and the engine, and the third speed ratio is the ratio of the number of teeth of the ring gear to the sun gear of the assembly architecture; based on the engine torque and the second speed ratio, the P1 motor torque is determined; based on the P1 motor speed and the P1 motor torque, the P1 motor power is determined; based on the P1 motor power, the P1 motor charging power is determined.

[0102] Specifically, based on n R_ECVT =c*v / 0.377 / r, determine the ring gear speed; where n R_ECVT is the ring gear speed, c is the first speed ratio, v is the vehicle speed, r is the wheel radius corresponding to the vehicle speed torque point; based on n P1_ECVT =a*n ENG_ECVT -b*n R_ECVT , determine the P1 motor speed; where n P1_ECVT is the P1 motor speed, n ENG_ECVT is the engine speed, a is the second speed ratio, b is the third speed ratio; based on T P1_ECVT =-1*T ENG_ECVT / a, determine the P1 motor torque; where T P1_ECVT is the P1 motor torque, T ENG_ECVT is the engine torque; based on P P1_ECVT =T P1_ECVT *n P1_ECVT / 9550, determine the P1 motor power; where P P1_ECVT P1 is the motor power; based on P P1_Charge_ECVT =P P1_ECVT *η GEN_Generate , determine the P1 motor charging power; where P P1_Charge_ECVT is the charging power of P1 motor, η GEN_Generate The P1 motor charging efficiency is the P1 motor.

[0103] Step S232: Determine the P3 motor charging power of the P3 motor based on the vehicle speed, the speed ratio parameter, the engine torque and the wheel torque. This can be specifically implemented as follows:

[0104] The P3 motor speed is determined based on the vehicle speed, wheel parameters and the fourth speed ratio; wherein the fourth speed ratio is the speed ratio between the P3 motor speed and the wheel; the ring gear torque of the ring gear is determined based on the engine torque, the second speed ratio and the third speed ratio; wherein the second speed ratio is the speed ratio between the P1 motor and the engine, and the third speed ratio is the speed ratio between the P1 motor and the ring gear; the P3 motor torque is determined based on the ring gear torque, wheel-side torque, the first speed ratio and the fourth speed ratio; wherein the first speed ratio is the speed ratio between the engine and the wheel; the P3 motor power is determined based on the P3 motor speed and the P3 motor torque; and the P3 motor charging power is determined based on the P3 motor power.

[0105] Specifically, based on n P3_ECVT =d*v / 0.377 / r, determine the speed of P3 motor; where n P3_ECVT is the P3 motor speed, d is the fourth speed ratio, v is the vehicle speed, and r is the wheel radius corresponding to the vehicle speed torque point; based on T R_ECVT =b / a*T ENG_ECVT , determine the ring gear torque; where T R_ECVT is the ring gear torque, T ENG_ECVT is the engine torque, a is the second speed ratio, b is the third speed ratio; based on T P3_ECVT =(T Wheel_ECVT -c*T R_ECVT ) / d, determine the P3 motor torque; where T P3_ECVT is the torque of the P3 motor, c is the first speed ratio, T Wheel_ECVT is the wheel torque; based on P P3_ECVT =T P3_ECVT *n P3_ECVT / 9550, determine the P3 motor power; where P P3_ECVT P3 motor power; based on P P3_Charge_ECVT =P P3_ECVT *η TM_Generate , determine the charging power of P3 motor; where P P3_Charge_ECVT The charging power of P3 motor, η TM_Generate P3 motor charging efficiency for P3 motor.

[0106] It can be understood that due to the inherent characteristics of the engine, P1 motor and P3 motor, they can only work within a certain parameter range; based on this, corresponding boundary conditions (range conditions) can be set for the engine, P1 motor and P3 motor. That is to say, when the corresponding parameters of the engine, P1 motor and P3 motor do not meet the boundary conditions, the corresponding speed torque points and vehicle speed torque points are determined to be invalid points, so that these points can be eliminated, further improving the accuracy of the equivalent specific fuel consumption.

[0107] Specifically, the following steps may be performed before step S233:

[0108] First, obtain the P1 motor torque, P1 motor speed, P1 motor power, P3 motor torque, P3 motor speed, P3 motor power, and engine torque; then, determine whether the P1 motor torque, P1 motor speed, P1 motor power, P3 motor torque, P3 motor speed, P3 motor power, and engine torque all meet their respective preset range conditions. It can be expressed as: -x < T P3_ECVT < x; -y < n P3_ECVT < y; -z <= P P3_ECVT <= z; -l < T P1_ECVT < l; -m < n P1_ECVT < m; -n <= P P1_ECVT <= n; T ENG_ECVT < p; where x, y, z, l, m, and n are all constants. Since the motor rotates in two different directions during charging and driving, symmetric value limits can be set; p is 90% of the engine's external characteristic.

[0109] After judging through the above range conditions, if there are parameters that do not meet the range conditions, no subsequent processing will be carried out. Steps S20 - S30 can be re - executed to sequentially traverse other combinations of speed - torque points and vehicle - speed - torque points. If the above parameters all meet the range conditions, step S233 will be executed.

[0110] Step S233: Based on the P1 motor charging power and the P3 motor charging power, determine the total charging power during the charging stage.

[0111] Since, in the ECVT mode of a hybrid vehicle, the engine will allocate a certain proportion of torque to drive the vehicle and use the remaining torque to charge the vehicle's power battery; at this time, the P1 motor can be used for power generation or output torque to drive the vehicle; similarly, the P3 motor can be used for power generation or output torque to drive the vehicle. The power signs during power generation and driving are opposite, with positive indicating driving. Therefore, in the ECVT mode, the battery can be charged only when the sum of the power vectors of the P1 motor and the P3 motor is negative. Therefore, step S233 can be specifically implemented as follows:

[0112] First, obtain the sum of the P1 motor charging power and the P3 motor charging power; then, judge whether the sum of the powers is greater than 0; if the sum of the powers is greater than 0, it is determined that the preset working condition is met; finally, determine the total charging power based on this sum of powers. Conversely, it is determined that the preset working condition is not met, and the corresponding vehicle - speed - torque points and speed - torque points can be excluded without further processing of subsequent steps, further improving the accuracy of the data and the reliability of the equivalent specific fuel consumption.

[0113] A specific implementation method is as follows:

[0114] The ring gear power after considering the ECVT efficiency is: P R_ECVT_EFF =P R_ECVT *η;

[0115] The mechanical power of the P3 motor after considering the ECVT efficiency is: P3_ECVT_EFF =P R_ECVT -P R_ECVT_EFF ;

[0116] P3 motor torque after considering ECVT efficiency: T P3_ECVT =P P3_ECVT_EFF *9550 / n P3_ECVT .

[0117] therefore:

[0118] When the P1 motor power is greater than 0 (i.e. P P1_ECVT >0), it means that the P1 motor is driving, then the P1 motor power is: P P1_Charge_ECVT =P P1_ECVT / η GEN_Drive ;

[0119] When the P1 motor power is less than or equal to 0 (i.e. P P1_ECVT <=0), it means that the P1 motor is generating electricity, then the P1 charging power is: P P1_Charge_ECVT =P P1_ECVT *η GEN_Generate ;

[0120] When the effective power of the P3 motor is greater than 0 (i.e. P P3_ECVT_EFF >0), indicating that the P3 motor is driving, then the P3 motor power is: P P3_Charge_ECVT =P P3_ECVT / η TM_Drive ;

[0121] When the effective power of the P3 motor is less than or equal to 0 (i.e. P P3_ECVT_EFF <=0), it means that the P3 motor is generating electricity, then the power of the P3 motor is: P P3_Charge_ECVT =P P3_ECVT *η TM_Generate .

[0122] Since this embodiment only considers the case of charging first and then discharging, P P1_Charge_ECVT +P P3_Charge_ECVT A value greater than 0 indicates driving, and a value less than 0 indicates charging. P1_Charge_ECVT +P P3_Charge_ECVT Points greater than 0 are excluded, and then according to the following formula:

[0123] P Total_Charge_ECVT =(P P1_Charge_ECVT +P P3_Charge_ECVT )*0.95 (4)

[0124] The total charging power of the battery during the charging process can be obtained. Among them, the parameter 0.95 can be adjusted based on different vehicles or hybrid powertrain architectures without restriction.

[0125] Therefore, through the above process, the points that do not meet the working conditions can be eliminated, which improves the reliability of the final result and avoids distorted results that reduce the reference value of the equivalent specific fuel consumption.

[0126] Step S30: Obtaining the equivalent specific fuel consumption of the vehicle based on the engine power, the battery driving power, the total charging power and the wheel-side required power.

[0127] Specifically, in step S30, the equivalent specific fuel consumption can be determined as follows:

[0128] f ECVT =P ENG_ECVT*ge *P Total_Drive_ECVT / (|P Total_Charge_ECVT |+P Total_Drive_ECVT ) / P Wheel_ECVT (5)

[0129] Based on the above formulas (1), (2), (3), (4) and (5), the equivalent specific fuel consumption of the vehicle can be determined; where f ECVT is the equivalent specific fuel consumption, P ENG_ECVT is the engine power, P Total_Drive_ECVT is the battery driving power, P Total_Charge_ECVT is the total charging power, P Wheel_ECVT The power required by the wheel side.

[0130] After all the vehicle speed torque points and speed torque points that meet the boundary conditions and working conditions are traversed through step S20 and step S30, the engine speed and torque corresponding to the lowest equivalent specific fuel consumption at each vehicle speed torque point, the speed and torque of the P1 motor, and the speed and torque of the P3 motor can be obtained. This can provide a reference for the subsequent shift MAP selection point and subsequent fuel consumption simulation.

[0131] See also Figure 2 Based on the same inventive concept, in one embodiment of the present invention, a hybrid vehicle equivalent specific fuel consumption determination device 300 is further provided, and the hybrid vehicle equivalent specific fuel consumption determination device 300 comprises:

[0132] The initial parameter acquisition module 301 is used to acquire a plurality of vehicle speed torque points and a plurality of speed torque points; wherein each of the vehicle speed torque points corresponds to a vehicle speed and a wheel torque; and each of the speed torque points corresponds to an engine speed and an engine torque;

[0133] The power determination module 302 is used to determine the engine power, the wheel side required power, the battery driving power in the electric drive stage and the total charging power in the charging stage under a preset working condition for any of the vehicle speed torque points and any of the speed torque points, based on the vehicle speed torque point and the speed torque point; the preset working condition is to control the vehicle to work in the charging stage first and then switch to the electric drive stage, and the battery power before and after the work remains unchanged;

[0134] The equivalent specific fuel consumption acquisition module 303 is used to obtain the equivalent specific fuel consumption of the vehicle based on the engine power, the battery driving power, the total charging power and the wheel-side required power.

[0135] As an optional implementation manner, the initial parameter acquisition module is specifically used to:

[0136] Define the vehicle speed range, wheel torque range, engine speed range and engine torque range of the vehicle; determine multiple vehicle speed torque points within the vehicle speed range and the wheel torque range; and determine multiple speed torque points within the engine speed range and the engine torque range.

[0137] As an optional implementation, the vehicle speed range is 10km / h to 160km / h, the wheel torque range is 100N·m to 2600N·m, the engine speed range is 1000rpm to 5200rpm, and the engine torque range is 10N·m to 300N·m.

[0138] As an optional implementation manner, the initial parameter acquisition module 301 is specifically used to:

[0139] Within the vehicle speed range, the values ​​are taken from small to large or from large to small, and a vehicle speed is determined every time a preset interval vehicle speed is increased; within the wheel-side torque range, the values ​​are taken from small to large or from large to small, and a wheel-side torque is determined every time a preset wheel-side interval torque is increased; for each of the vehicle speeds, it is matched with a different wheel-side torque to obtain the multiple vehicle speed torque points.

[0140] As an optional implementation manner, the initial parameter acquisition module 301 is specifically used to:

[0141] Within the engine speed range, the values ​​are taken from small to large or from large to small, and a speed is determined each time a preset interval speed is increased; within the engine torque range, the values ​​are taken from small to large or from large to small, and an engine torque is determined each time a preset engine interval torque is increased; for each of the speeds, it is matched with a different engine torque to obtain the multiple speed torque points.

[0142] As an optional implementation manner, the equivalent specific fuel consumption acquisition module 303 is specifically used to:

[0143] Based on f ECVT =P ENG_ECVT *ge*P Total_Drive_ECVT / (|P Total_Charge_ECVT |+P Total_Drive_ECVT ) / P Wheel_ECVT , determine the equivalent specific fuel consumption of the vehicle; where f ECVT is the equivalent specific fuel consumption, P ENG_ECVT is the engine power, P Total_Drive_ECVT is the battery driving power, P Total_Charge_ECVT is the total charging power, P Wheel_ECVT The power required by the wheel side.

[0144] As an optional implementation manner, the power determination module 302 is specifically configured to:

[0145] Based on the engine speed and engine torque corresponding to the speed torque point, the engine power in the charging stage is obtained; based on the wheel parameters of the vehicle and the vehicle speed and wheel torque corresponding to the vehicle speed torque point, the wheel demand power and the battery driving power in the electric drive stage are obtained; based on the speed ratio parameters of the vehicle, the engine torque corresponding to the speed torque point, the engine speed corresponding to the speed torque point, the wheel torque corresponding to the vehicle speed torque point and the vehicle speed corresponding to the vehicle speed torque point, the total charging power in the charging stage is determined.

[0146] As an optional implementation manner, the power determination module 302 is further specifically configured to:

[0147] Based on P ENG_ECVT =T ENG_ECVT *n ENG_ECVT / 9550, determine the engine power; wherein, P ENG_ECVT is the engine power during the charging phase, T ENG_ECVT is the engine torque corresponding to the speed torque point in the charging phase, n ENG_ECVT is the engine speed corresponding to the speed torque point during the charging phase.

[0148] As an optional implementation manner, the power determination module 302 is further specifically configured to:

[0149] Based on P Wheel_ECVT =P Wheel =T Wheel *n Wheel / 9550, determine the wheel side required power; where P Wheel_ECVT is the wheel side power requirement during the charging phase, P Wheel is the wheel side power requirement, T Wheel is the wheel torque, n Wheelis the wheel speed; based on P Total_Drive_ECVT =P Wheel_ECVT / η / η TM_Drive / 0.95, determine the battery driving power in the electric drive stage; where P Total_Drive_ECVT is the battery driving power in the electric drive stage, η is the system driving efficiency, η TM_Drive It is the P3 motor drive efficiency; during the electric drive stage, only the P3 motor of the hybrid powertrain architecture works.

[0150] As an optional implementation, the hybrid powertrain architecture includes a P1 motor and a P3 motor; the power determination module 302 is further specifically configured to:

[0151] Based on the vehicle speed, the speed ratio parameter, the engine speed and the engine torque, the P1 motor charging power of the P1 motor is determined; based on the vehicle speed, the speed ratio parameter, the engine torque and the wheel-side torque, the P3 motor charging power of the P3 motor is determined; based on the P1 motor charging power and the P3 motor charging power, the total charging power in the charging stage is determined.

[0152] As an optional implementation manner, the speed ratio parameters include a first speed ratio, a second speed ratio and a third speed ratio; the power determination module 302 is further specifically used for:

[0153] Based on the vehicle speed, wheel parameters and the first speed ratio, the ring gear speed of the assembly architecture in the charging stage is determined; wherein the first speed ratio is the speed ratio between the engine and the wheel; based on the ring gear speed, the engine speed, the second speed ratio and the third speed ratio, the P1 motor speed is determined; wherein the second speed ratio is the speed ratio between the P1 motor and the engine, and the third speed ratio is the ratio of the number of teeth of the ring gear to the sun gear of the assembly architecture; based on the engine torque and the second speed ratio, the P1 motor torque is determined; based on the P1 motor speed and the P1 motor torque, the P1 motor power is determined; based on the P1 motor power, the P1 motor charging power is determined.

[0154] As an optional implementation manner, the power determination module 302 is further specifically configured to:

[0155] Based on n R_ECVT =c*v / 0.377 / r, determine the gear ring speed; where n R_ECVT is the ring gear speed, c is the first speed ratio, v is the vehicle speed, r is the wheel radius corresponding to the vehicle speed torque point; based on n P1_ECVT =a*n ENG_ECVT -b*n R_ECVT , determine the P1 motor speed; where n P1_ECVT is the P1 motor speed, n ENG_ECVTis the engine speed, a is the second speed ratio, b is the third speed ratio; based on T P1_ECVT =-1*T ENG_ECVT / a, determine the P1 motor torque; where T P1_ECVT is the P1 motor torque, T ENG_ECVT is the engine torque; based on P P1_ECVT =T P1_ECVT *n P1_ECVT / 9550, determine the P1 motor power; wherein, P P1_ECVT P1 is the motor power; based on P P1_Charge_ECVT =P P1_ECVT *η GEN_Generate , determine the P1 motor charging power; where P P1_Charge_ECVT is the charging power of P1 motor, η GEN_Generate The P1 motor charging efficiency is the P1 motor.

[0156] As an optional implementation manner, the speed ratio parameters include a first speed ratio, a second speed ratio, a third speed ratio and a fourth speed ratio; the power determination module 302 is further specifically used for:

[0157] Based on the vehicle speed, wheel parameters and the fourth speed ratio, the P3 motor speed is determined; wherein the fourth speed ratio is the speed ratio between the P3 motor speed and the wheel; based on the engine torque, the second speed ratio and the third speed ratio, the ring gear torque of the ring gear is determined; wherein the second speed ratio is the speed ratio between the P1 motor and the engine, and the third speed ratio is the speed ratio between the P1 motor and the ring gear; based on the ring gear torque, the wheel-side torque, the first speed ratio and the fourth speed ratio, the P3 motor torque is determined; wherein the first speed ratio is the speed ratio between the engine and the wheel; based on the P3 motor speed and the P3 motor torque, the P3 motor power is determined; based on the P3 motor power, the P3 motor charging power is determined.

[0158] As an optional implementation manner, the power determination module 302 is further specifically configured to:

[0159] Based on n P3_ECVT =d*v / 0.377 / r, determine the P3 motor speed; where n P3_ECVT is the P3 motor speed, d is the fourth speed ratio, v is the vehicle speed, and r is the wheel radius corresponding to the vehicle speed torque point; based on T R_ECVT =b / a*T ENG_ECVT , determine the ring gear torque; where T R_ECVT is the ring gear torque, T ENG_ECVT is the engine torque, a is the second speed ratio, b is the third speed ratio; based on T P3_ECVT =(T Wheel_ECVT -c*T R_ECVT) / d, determine the P3 motor torque; wherein, T P3_ECVT is the torque of the P3 motor, c is the first speed ratio, T Wheel_ECVT is the wheel torque; based on P P3_ECVT =T P3_ECVT *n P3_ECVT / 9550, determine the P3 motor power; wherein, P P3_ECVT P3 motor power; based on P P3_Charge_ECVT =P P3_ECVT *η TM_Generate , determine the charging power of the P3 motor; where P P3_Charge_ECVT The charging power of P3 motor, η TM_Generate P3 motor charging efficiency for P3 motor.

[0160] As an optional implementation manner, a condition judgment module is further included, which is used before determining the total charging power in the charging stage based on the P1 motor charging power and the P3 motor charging power:

[0161] Obtain the P1 motor torque, P1 motor speed, P1 motor power, P3 motor torque, P3 motor speed, P3 motor power and engine torque; determine whether the P1 motor torque, the P1 motor speed, the P1 motor power, the P3 motor torque, the P3 motor speed, the P3 motor power and the engine torque all meet their respective preset range conditions; if so, execute the step of determining the total charging power in the charging stage based on the P1 motor charging power and the P3 motor charging power.

[0162] As an optional implementation manner, the power determination module 302 is further specifically configured to:

[0163] Obtain the sum of the P1 motor charging power and the P3 motor charging power; determine whether the sum of the powers is greater than 0; if the sum of the powers is greater than 0, determine that the preset working condition is met; based on the sum of the powers, determine the total charging power.

[0164] It should be noted that the equivalent specific fuel consumption determination device 300 for a hybrid vehicle provided in an embodiment of the present invention has the same specific implementation and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0165] Based on the same inventive concept, another embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the memory is coupled to the processor, and the memory stores instructions, and when the instructions are executed by the processor, the electronic device executes the steps of the method described in any one of the aforementioned embodiments. It should be noted that, in the electronic device provided in the embodiment of the present invention, when the instructions are executed by the processor, the specific implementation of each step and the technical effect produced are the same as those in the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0166] The term "and / or" that appears in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. 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 objects associated before and after are in an "or" relationship; the word "comprising" does not exclude the existence of elements or steps that are not listed in the claims. The word "one" or "an" placed before an element does not exclude the existence of multiple such elements. The present invention can be implemented with the aid of hardware including several different elements and with the aid of appropriately programmed computers. In a unit claim that lists several devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

[0167] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0168] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0169] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0170] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0171] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0172] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for determining equivalent specific fuel consumption of a hybrid vehicle, characterized in that: The hybrid vehicle includes a hybrid powertrain architecture, the method comprising: Acquire multiple vehicle speed torque points and multiple speed torque points; wherein each of the vehicle speed torque points corresponds to a vehicle speed and a wheel-side torque; each of the speed torque points corresponds to an engine speed and an engine torque; For any of the vehicle speed torque points and any of the speed torque points, the engine power, the wheel side required power, the battery driving power in the electric drive stage and the total charging power in the charging stage under the preset working condition are determined based on the vehicle speed torque point and the speed torque point; the preset working condition is to control the vehicle to work in the charging stage first and then switch to the electric drive stage, and the battery power before and after the work remains unchanged; Obtaining an equivalent specific fuel consumption of the vehicle based on the engine power, the battery driving power, the total charging power and the wheel-side required power; The obtaining the equivalent specific fuel consumption of the vehicle based on the engine power, the battery driving power, the total charging power and the wheel side required power includes: based on , determine the equivalent specific fuel consumption of the vehicle; wherein, is the equivalent specific fuel consumption, is the engine power, is the battery driving power, is the total charging power, The power required by the wheel side.

2. The method according to claim 1, characterized in that The determining of the engine power, wheel side demand power, battery driving power in the electric drive stage and total charging power in the charging stage under the preset working condition based on the vehicle speed torque point and the speed torque point includes: Based on the engine speed and engine torque corresponding to the speed torque point, obtaining the engine power in the charging stage; Based on the wheel parameters of the vehicle and the vehicle speed and wheel torque corresponding to the vehicle speed torque point, obtaining the wheel power requirement and the battery driving power in the electric drive stage; The total charging power during the charging stage is determined based on the speed ratio parameters of the vehicle, the engine torque corresponding to the speed torque point, the engine speed corresponding to the speed torque point, the wheel torque corresponding to the vehicle speed torque point and the vehicle speed corresponding to the vehicle speed torque point.

3. The method according to claim 2, characterized in that The hybrid powertrain architecture includes a P1 motor and a P3 motor; the determining the total charging power in the charging stage based on the speed ratio parameter of the vehicle, the engine torque corresponding to the speed torque point, the engine speed corresponding to the speed torque point, the wheel torque corresponding to the vehicle speed torque point, and the vehicle speed corresponding to the vehicle speed torque point includes: determining a P1 motor charging power of the P1 motor based on the vehicle speed, the speed ratio parameter, the engine speed, and the engine torque; Determining a P3 motor charging power of a P3 motor based on the vehicle speed, the speed ratio parameter, the engine torque, and the wheel torque; The total charging power in the charging stage is determined based on the P1 motor charging power and the P3 motor charging power.

4. The method according to claim 3, characterized in that The speed ratio parameter includes a first speed ratio, a second speed ratio, and a third speed ratio; and determining the P1 motor charging power of the P1 motor based on the vehicle speed, the speed ratio parameter, the engine speed, and the engine torque includes: Determining a ring gear speed of a ring gear of the assembly architecture during the charging phase based on the vehicle speed, the wheel parameters and a first speed ratio, wherein the first speed ratio is a speed ratio between an engine and a wheel; Determine the P1 motor speed based on the ring gear speed, the engine speed, the second speed ratio and the third speed ratio; wherein the second speed ratio is the speed ratio between the P1 motor and the engine, and the third speed ratio is the ratio of the number of teeth of the ring gear to the sun gear of the assembly architecture; determining a P1 motor torque based on the engine torque and the second speed ratio; Determining the P1 motor power based on the P1 motor speed and the P1 motor torque; Based on the P1 motor power, the P1 motor charging power is determined.

5. The method according to claim 3, characterized in that: The speed ratio parameters include a first speed ratio, a second speed ratio, a third speed ratio, and a fourth speed ratio; and determining the P3 motor charging power of the P3 motor based on the vehicle speed, the speed ratio parameters, the engine torque, and the wheel torque includes: Determine the P3 motor speed based on the vehicle speed, wheel parameters and a fourth speed ratio; wherein the fourth speed ratio is a speed ratio between the P3 motor speed and the wheel; Determining the ring gear torque of the ring gear based on the engine torque, the second speed ratio and the third speed ratio; wherein the second speed ratio is the speed ratio between the P1 motor and the engine, and the third speed ratio is the speed ratio between the P1 motor and the ring gear; Determine the P3 motor torque based on the ring gear torque, the wheel side torque, the first speed ratio and the fourth speed ratio; wherein the first speed ratio is the speed ratio between the engine and the wheels; Determine the P3 motor power based on the P3 motor speed and the P3 motor torque; Based on the P3 motor power, the P3 motor charging power is determined.

6. The method according to claim 3, characterized in that Before determining the total charging power in the charging stage based on the P1 motor charging power and the P3 motor charging power, the method further includes: Obtain P1 motor torque, P1 motor speed, P1 motor power, P3 motor torque, P3 motor speed, P3 motor power and engine torque; Determine whether the P1 motor torque, the P1 motor speed, the P1 motor power, the P3 motor torque, the P3 motor speed, the P3 motor power and the engine torque all meet respective preset range conditions; If so, execute the step of determining the total charging power in the charging stage based on the P1 motor charging power and the P3 motor charging power.

7. The method according to claim 6, characterized in that The determining the total charging power in the charging stage based on the P1 motor charging power and the P3 motor charging power includes: Obtaining the sum of the charging power of the P1 motor and the charging power of the P3 motor; Determine whether the sum of the powers is greater than 0; If the sum of the powers is greater than 0, it is determined that the preset working condition is met; The total charging power is determined based on the sum of the powers.

8. A device for determining equivalent specific fuel consumption of a hybrid vehicle, characterized in that: The hybrid vehicle includes a hybrid powertrain architecture, the device comprising: An initial parameter acquisition module, used to acquire a plurality of vehicle speed torque points and a plurality of rotation speed torque points; wherein each of the vehicle speed torque points corresponds to a vehicle speed and a wheel side torque; and each of the rotation speed torque points corresponds to an engine speed and an engine torque; A power determination module, for determining, for any of the vehicle speed torque points and any of the speed torque points, the engine power, the wheel side required power, the battery driving power in the electric drive stage, and the total charging power in the charging stage under a preset working condition based on the vehicle speed torque point and the speed torque point; the preset working condition is to control the vehicle to work in the charging stage first and then switch to the electric drive stage, and the battery power before and after the work remains unchanged; An equivalent specific fuel consumption acquisition module, used for obtaining the equivalent specific fuel consumption of the vehicle based on the engine power, the battery driving power, the total charging power and the wheel side required power; The obtaining the equivalent specific fuel consumption of the vehicle based on the engine power, the battery driving power, the total charging power and the wheel side required power includes: based on , determine the equivalent specific fuel consumption of the vehicle; wherein, is the equivalent specific fuel consumption, is the engine power, is the battery driving power, is the total charging power, The power required by the wheel side.

9. An electronic device, characterized in that: The electronic device comprises a processor and a memory, wherein the memory is coupled to the processor and stores instructions, and when the instructions are executed by the processor, the electronic device executes the steps of the method according to any one of claims 1 to 7.

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