Automobile shift strategy optimization method, device and computer storage medium

Abstract

The embodiment of the present application discloses a method, device and computer storage medium for optimizing the shift strategy of an automobile, and belongs to the field of automobile technology. The method includes: obtaining the optimal economic curve and the first shift strategy of the engine of the target automobile, the optimal economic curve includes the corresponding relationship between the engine speed and the engine torque, and the target automobile is a prototype car in the development state; according to the optimal economic curve, determining the second shift strategy of the engine, the second shift strategy includes the corresponding relationship between the engine demand power and the engine speed; interpolating the second shift strategy through the first shift strategy to obtain the optimized shift strategy of the target automobile. The embodiment of the present application optimizes the shift strategy of the target automobile so that the operating condition of the engine is close to the optimal economic curve, thereby not only reducing fuel consumption, but also not increasing the project development cost, and being able to keep the power of the target automobile unchanged.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of automobile technology, and in particular to a method and device for optimizing an automobile gear shift strategy, and a computer storage medium. Background Art

[0002] With the development of social economy, the popularity of cars is increasing. Automatic transmission cars are becoming more and more popular due to their advantages of easy operation, safety and labor saving. Among them, automatic transmission cars do not require the driver to manually adjust the gear of the car, but automatically adjust the gear of the car according to the gear shift strategy (also called gear shift map) in the car. As the regulations on automobile fuel consumption become increasingly stringent, in order to reduce the fuel consumption of the car, the gear shift strategy of the car is usually adjusted.

[0003] At present, when adjusting the gear shifting strategy of an automobile, the gear shifting speed in the gear shifting strategy is usually reduced as a whole, thereby reducing the fuel consumption of the vehicle.

[0004] However, although the fuel consumption of the car can be reduced by lowering the gear shift speed, the power of the car will also be reduced, resulting in poor power. Summary of the invention

[0005] The embodiment of the present application provides a method, device and computer storage medium for optimizing the gear shift strategy of an automobile, which can be used to solve the problem in the related art that the power performance of the automobile is deteriorated when the gear shift strategy is optimized. The technical solution is as follows:

[0006] In one aspect, a method for optimizing a shift strategy of a vehicle is provided, the method comprising:

[0007] Obtaining an optimal economy curve and a first shifting strategy of an engine of a target vehicle, wherein the first shifting strategy includes engine power requirements corresponding to the target vehicle at different vehicle speeds and throttles, and the optimal economy curve includes a corresponding relationship between engine speed and engine torque, and the target vehicle is a prototype vehicle in a development state;

[0008] Determining a second shifting strategy of the engine according to the optimal economic curve, wherein the second shifting strategy includes a corresponding relationship between the engine required power and the engine speed;

[0009] The second gear shift strategy is interpolated through the first gear shift strategy to obtain an optimized gear shift strategy for the target vehicle.

[0010] In some embodiments, before obtaining the optimal economic curve and the first shift strategy of the engine of the target vehicle, the method further includes:

[0011] Acquiring structural parameters and state parameters of the target vehicle;

[0012] Constructing a one-dimensional power economy simulation model of the target vehicle according to the structural parameters and state parameters of the target vehicle;

[0013] Performing fuel consumption tests on the target vehicle and the one-dimensional power economy simulation model respectively to obtain a first fuel consumption test parameter and a second fuel consumption test parameter;

[0014] When the error between the first fuel consumption test parameter and the second fuel consumption test parameter is less than or equal to an error threshold, the operation of obtaining the optimal economic curve of the engine of the target vehicle and the first shifting strategy is performed.

[0015] In some embodiments, the interpolation processing of the second gear shift strategy by the first gear shift strategy to obtain the optimized gear shift strategy of the target vehicle includes:

[0016] Interpolating the second shift strategy through the first shift strategy to obtain a reference shift strategy;

[0017] The reference shifting strategy is simulated and tested in a one-dimensional power economy simulation model of the target vehicle to obtain a simulation result;

[0018] When the simulation result meets the test requirements, the reference shift strategy is determined to be the optimized shift strategy.

[0019] In some embodiments, the step of obtaining the optimal economic curve of the engine of the target vehicle includes:

[0020] Obtaining the engine speed, throttle opening and engine torque of the engine of the target vehicle under the test conditions;

[0021] According to the engine speed, throttle opening and engine torque of the engine under the test working condition, in the universal characteristic data diagram of the engine, determining the engine isopower line corresponding to the engine speed, wherein the abscissa of the universal characteristic data diagram is the engine speed, and the ordinate of the universal characteristic data diagram is the engine torque;

[0022] According to the fuel consumption rate corresponding to the engine speed, find the engine power corresponding to the lowest point of the fuel consumption rate on the engine isopower line;

[0023] The curve consisting of the engine speed and the engine power corresponding to the lowest point of the fuel consumption rate is determined as the optimal economic curve.

[0024] In some embodiments, the step of obtaining a first shift strategy of an engine of a target vehicle includes:

[0025] Acquire a pedal correspondence and a basic shifting strategy of the target vehicle, wherein the pedal correspondence includes a correspondence between a throttle opening, an engine speed, and an engine torque of the target vehicle, and the basic shifting strategy includes a correspondence between a vehicle speed, a throttle opening, and an engine speed of the target vehicle;

[0026] Determining a torque correspondence of the target vehicle according to the pedal correspondence and the basic shifting strategy, wherein the torque correspondence includes a correspondence between a vehicle speed, an accelerator opening, and an engine torque of the target vehicle;

[0027] The first gear shifting strategy is determined according to the torque correspondence.

[0028] On the other hand, a device for optimizing a shift strategy of an automobile is provided, the device comprising:

[0029] A first acquisition module is used to acquire an optimal economy curve and a first shifting strategy of an engine of a target vehicle, wherein the first shifting strategy includes engine power requirements corresponding to different vehicle speeds and throttles of the target vehicle, and the optimal economy curve includes a corresponding relationship between engine speed and engine torque, and the target vehicle is a prototype vehicle in a development state;

[0030] a determination module, configured to determine a second shifting strategy of the engine according to the optimal economic curve, wherein the second shifting strategy includes a corresponding relationship between the engine required power and the engine speed;

[0031] An interpolation module is used to perform interpolation processing on the second gear shift strategy through the first gear shift strategy to obtain the optimized gear shift strategy of the target vehicle.

[0032] In some embodiments, the apparatus further comprises:

[0033] A second acquisition module is used to acquire the structural parameters and state parameters of the target vehicle;

[0034] A construction module, used to construct a one-dimensional power economy simulation model of the target vehicle according to the structural parameters and state parameters of the target vehicle;

[0035] A test module, used to perform fuel consumption tests on the target vehicle and the one-dimensional power economy simulation model respectively, to obtain a first fuel consumption test parameter and a second fuel consumption test parameter;

[0036] The trigger module is used to trigger the first acquisition module to acquire the optimal economic curve and the first shifting strategy of the engine of the target vehicle when the error between the first fuel consumption test parameter and the second fuel consumption test parameter is less than or equal to the error threshold.

[0037] In some embodiments, the interpolation module includes:

[0038] an interpolation submodule, configured to interpolate the second shift strategy through the first shift strategy to obtain a reference shift strategy;

[0039] A testing submodule, used for performing a simulation test on the reference shifting strategy in a one-dimensional power economy simulation model of the target vehicle to obtain a simulation result;

[0040] The first determination submodule is used to determine that the reference shift strategy is the optimized shift strategy when the simulation result meets the test requirements.

[0041] In some embodiments, the first acquisition module includes:

[0042] A first acquisition submodule is used to acquire the engine speed, throttle opening and engine torque of the engine of the target vehicle under the test condition;

[0043] A second determination submodule is used to determine an engine isopower line corresponding to the engine speed in a universal characteristic data diagram of the engine according to the engine speed, throttle opening and engine torque of the engine under the test condition, wherein the abscissa of the universal characteristic data diagram is the engine speed and the ordinate of the universal characteristic data diagram is the engine torque;

[0044] A search submodule, for searching the engine power corresponding to the lowest point of the fuel consumption rate on the engine isopower line according to the fuel consumption rate corresponding to the engine speed;

[0045] The third determination submodule is used to determine a curve consisting of the engine speed and the engine power corresponding to the lowest point of the fuel consumption rate as the optimal economic curve.

[0046] In some embodiments, the first acquisition module includes:

[0047] A second acquisition submodule is used to acquire a pedal correspondence relationship and a basic shifting strategy of the target vehicle, wherein the pedal correspondence relationship includes a correspondence relationship between a throttle opening, an engine speed, and an engine torque of the target vehicle, and the basic shifting strategy includes a correspondence relationship between a vehicle speed, a throttle opening, and an engine speed of the target vehicle;

[0048] A fourth determination submodule, configured to determine a torque correspondence of the target vehicle according to the pedal correspondence and the basic shifting strategy, wherein the torque correspondence includes a correspondence between a vehicle speed, an accelerator opening, and an engine torque of the target vehicle;

[0049] The fifth determining submodule is used to determine the first gear shifting strategy according to the torque correspondence.

[0050] On the other hand, a computer-readable storage medium is provided, on which instructions are stored, and when the instructions are executed by a processor, any step of the above-mentioned method for optimizing the gear shift strategy of the automobile is implemented.

[0051] The beneficial effects brought by the technical solution provided by the embodiment of the present application include at least:

[0052] In the embodiment of the present application, the shifting strategy of the target vehicle can be optimized through the optimal economic curve of the engine of the target vehicle and the first shifting strategy, so that the operating conditions of the engine are close to the optimal economic curve, thereby not only reducing fuel consumption, but also not increasing the project development cost, and being able to keep the power of the target vehicle unchanged. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0054] Figure 1 This is a flow chart of a method for optimizing a shift strategy of an automobile provided in an embodiment of the present application;

[0055] Figure 2 is a flow chart of another method for optimizing a shift strategy of an automobile provided in an embodiment of the present application;

[0056] Figure 3 It is a structural schematic diagram of a vehicle shift strategy optimization device provided in an embodiment of the present application;

[0057] Figure 4 It is a structural schematic diagram of another vehicle shift strategy optimization device provided in an embodiment of the present application;

[0058] Figure 5 is a structural diagram of an interpolation module provided in an embodiment of the present application;

[0059] Figure 6 is a structural diagram of a first acquisition module provided in an embodiment of the present application;

[0060] Figure 7 is a structural diagram of another first acquisition module provided in an embodiment of the present application;

[0061] Figure 8It is a structural diagram of a terminal provided in an embodiment of the present application. DETAILED DESCRIPTION

[0062] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the implementation methods of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0063] Before explaining in detail a method for optimizing a shift strategy of an automobile provided in an embodiment of the present application, an application scenario provided in an embodiment of the present application is first explained.

[0064] With the development of social economy, the popularity of automobiles is increasing. However, with the promotion of energy conservation and emission reduction, the limits on automobile fuel consumption are becoming increasingly strict. Automobile manufacturers have begun to apply various fuel-saving measures to reduce vehicle fuel consumption, such as engine idle start-stop system, battery intelligent charging system, variable air intake grille, low rolling resistance tires, etc., but the negative effect is the continuous increase in vehicle costs. Therefore, there is also the choice of reducing the overall shift speed in the shift strategy to reduce the vehicle's fuel consumption. However, although the fuel consumption of the car can be reduced by reducing the shift speed, the power of the car will also be reduced, resulting in poor power.

[0065] Based on such an application scenario, an embodiment of the present application provides a method for optimizing the gear shifting strategy of a vehicle that can reduce the cost of the entire vehicle and ensure the vehicle's power.

[0066] Figure 1 : is a flow chart of a method for optimizing a shift strategy of a vehicle provided in an embodiment of the present application. The method for optimizing a shift strategy of a vehicle may include the following steps:

[0067] Step 101: Obtain an optimal economic curve and a first shifting strategy of the target vehicle's engine, wherein the first shifting strategy includes the engine power requirements of the target vehicle at different vehicle speeds and throttles, and the optimal economic curve includes a corresponding relationship between the engine speed and the engine torque. The target vehicle is a prototype vehicle under development.

[0068] Step 102: Determine a second shifting strategy for the engine according to the optimal economic curve, where the second shifting strategy includes a corresponding relationship between the engine required power and the engine speed.

[0069] Step 103: interpolating the second gear shift strategy through the first gear shift strategy to obtain an optimized gear shift strategy for the target vehicle.

[0070] In the embodiment of the present application, the shifting strategy of the target vehicle can be optimized through the optimal economic curve of the engine of the target vehicle and the first shifting strategy, so that the operating conditions of the engine are close to the optimal economic curve, thereby not only reducing fuel consumption, but also not increasing the project development cost, and being able to keep the power of the target vehicle unchanged.

[0071] In some embodiments, before obtaining the optimal economic curve and the first shifting strategy of the engine of the target vehicle, the method further includes:

[0072] Obtaining structural parameters and state parameters of the target vehicle;

[0073] According to the structural parameters and state parameters of the target vehicle, a one-dimensional power economy simulation model of the target vehicle is constructed;

[0074] Performing fuel consumption tests on the target vehicle and the one-dimensional power economy simulation model respectively to obtain a first fuel consumption test parameter and a second fuel consumption test parameter;

[0075] When the error between the first fuel consumption test parameter and the second fuel consumption test parameter is less than or equal to an error threshold, the operation of obtaining the optimal economic curve of the engine of the target vehicle and the first shifting strategy is performed.

[0076] In some embodiments, the second shift strategy is interpolated by the first shift strategy to obtain the optimized shift strategy of the target vehicle, including:

[0077] Interpolating the second shift strategy through the first shift strategy to obtain a reference shift strategy;

[0078] The reference shift strategy is simulated and tested in a one-dimensional power economy simulation model of the target vehicle to obtain a simulation result;

[0079] When the simulation result meets the test requirements, the reference shift strategy is determined to be the optimized shift strategy.

[0080] In some embodiments, obtaining the optimal economic curve of the engine of the target vehicle includes:

[0081] Obtaining the engine speed, throttle opening and engine torque of the target vehicle under the test conditions;

[0082] According to the engine speed, throttle opening and engine torque of the engine under the test condition, in the universal characteristic data diagram of the engine, determine the engine isopower line corresponding to the engine speed, the abscissa of the universal characteristic data diagram is the engine speed, and the ordinate of the universal characteristic data diagram is the engine torque;

[0083] According to the fuel consumption rate corresponding to the engine speed, find the engine power corresponding to the lowest point of the fuel consumption rate on the engine isopower line;

[0084] The curve consisting of the engine speed and the engine power corresponding to the lowest point of the fuel consumption rate is determined as the optimal economic curve.

[0085] In some embodiments, obtaining a first shift strategy of an engine of a target vehicle includes:

[0086] Obtaining a pedal correspondence and a basic shifting strategy of the target vehicle, wherein the pedal correspondence includes a correspondence between a throttle opening, an engine speed, and an engine torque of the target vehicle, and the basic shifting strategy includes a correspondence between a vehicle speed, a throttle opening, and an engine speed of the target vehicle;

[0087] Determining a torque correspondence of the target vehicle according to the pedal correspondence and the basic shifting strategy, wherein the torque correspondence includes a correspondence between a vehicle speed, an accelerator opening, and an engine torque of the target vehicle;

[0088] The first gear shifting strategy is determined according to the torque correspondence.

[0089] All the above optional technical solutions can be combined in any way to form optional embodiments of the present application, and the embodiments of the present application will not be described in detail one by one.

[0090] Figure 2 : is a flow chart of a method for optimizing a shift strategy of a vehicle provided in an embodiment of the present application. This embodiment is illustrated by applying the method for optimizing a shift strategy of a vehicle to a terminal. The method for optimizing a shift strategy of a vehicle may include the following steps:

[0091] Step 201: The terminal obtains the optimal economic curve and the first gear shifting strategy of the engine of the target vehicle.

[0092] It should be noted that the first shift strategy includes the engine power requirements of the target vehicle at different vehicle speeds and throttles, the optimal economy curve includes the corresponding relationship between the engine speed and the engine torque, the target vehicle is a prototype vehicle in the development state, and the model of the target vehicle can be a CVT (Continuously Variable Transmission) model. The optimal economy curve of the target vehicle can reflect the minimum fuel consumption corresponding to the target vehicle while maintaining the power performance.

[0093] Since the optimal economic curve of the target vehicle can reflect the minimum fuel consumption of the target vehicle while maintaining the power performance, the terminal can obtain the optimal economic curve of the engine of the target vehicle.

[0094] As an example, the operation of the terminal obtaining the optimal economic curve of the engine of the target vehicle includes: obtaining the engine speed, throttle opening and engine torque of the engine of the target vehicle under the test conditions; according to the engine speed, throttle opening and engine torque of the engine under the test conditions, determining the engine isopower line corresponding to the engine speed in the universal characteristic data diagram of the engine, the horizontal axis of the universal characteristic data diagram is the engine speed, and the vertical axis of the universal characteristic data diagram is the engine torque; according to the fuel consumption rate corresponding to the engine speed, searching the engine power corresponding to the lowest point of the fuel consumption rate on the engine isopower line; determining the curve composed of the engine speed and the engine power corresponding to the lowest point of the fuel consumption rate as the optimal economic curve.

[0095] It should be noted that the target vehicle can be a development prototype vehicle that has PE performance in the middle of the project development, and the vehicle status and related parameters of the development prototype vehicle have been obtained. Therefore, the target vehicle has the conditions for testing. Therefore, the user can test the target vehicle under the test conditions, so that the terminal can obtain the test data such as engine speed, throttle opening and engine torque of the target vehicle under the test conditions. The experimental condition can be any condition encountered by the target vehicle during driving.

[0096] It should also be noted that, under the test conditions of the transmitter, the terminal can not only obtain the transmitter speed, throttle opening and engine torque, but also other data, such as the external characteristics and universal characteristics data of the engine.

[0097] Since the universal characteristic data diagram of the transmitter shows the curves of engine output torque, engine speed, cylinder effective pressure and unit power time fuel consumption, the terminal can determine the universal characteristic data diagram of the target vehicle engine based on the external characteristics, universal characteristic data and other data of the engine with the help of a preset MATLAB M file, and determine the engine isopower line corresponding to the engine speed in the universal characteristic data diagram of the engine based on the engine speed, throttle opening and engine torque under the test conditions.

[0098] It should be noted that the terminal can refer to relevant technologies for the operation of determining the universal characteristic data diagram of the target automobile engine based on the external characteristics, universal characteristic data and other data of the engine through a pre-set MATLAB M file, and the embodiment of the present application will not go into details one by one.

[0099] As an example, the terminal can not only obtain the engine speed, throttle opening and engine torque of the target vehicle's engine under the test conditions, but also obtain the engine speed, throttle opening and engine torque of the target vehicle's engine under the test conditions through the target vehicle's one-dimensional power economy simulation model. The one-dimensional power economy simulation model is used to simulate the power of the target vehicle's engine under various conditions. Therefore, the terminal can simulate the engine's test conditions through the one-dimensional power economy simulation model to obtain the engine speed, throttle opening and engine torque of the engine under the test conditions.

[0100] In some embodiments, the one-dimensional power economy simulation model is obtained by the terminal before obtaining the optimal economy curve and the first gear shifting strategy of the engine of the target vehicle, that is, before the terminal obtains the optimal economy curve and the first gear shifting strategy of the engine of the target vehicle, the terminal can also obtain the structural parameters and state parameters of the target vehicle; according to the structural parameters and state parameters of the target vehicle, a one-dimensional power economy simulation model of the target vehicle is constructed; fuel consumption tests are performed on the target vehicle and the one-dimensional power economy simulation model respectively to obtain a first fuel consumption test parameter and a second fuel consumption test parameter; when the error between the first fuel consumption test parameter and the second fuel consumption test parameter is less than or equal to the error threshold, the above-mentioned step 201 is performed.

[0101] It should be noted that the structural parameters are parameters related to the structure of the target vehicle, and the state parameters refer to parameters describing the current state of the vehicle, such as the friction coefficient of the vehicle, etc. The terminal can establish a one-dimensional power economy simulation model of the target vehicle in the CRUISE application, and the operation of the terminal establishing the one-dimensional power economy simulation model of the target vehicle can refer to related technologies, which will not be described one by one in the embodiment of the present application.

[0102] In some embodiments, in order to ensure the optimization effect of the engine shifting strategy, the terminal can also determine the simulation accuracy of the one-dimensional power economy simulation model on the engine. Therefore, the terminal can perform fuel consumption tests on the target vehicle and the one-dimensional power economy simulation model respectively to obtain the first fuel consumption test parameter and the second fuel consumption test parameter; when the error between the first fuel consumption test parameter and the second fuel consumption test parameter is less than or equal to the error threshold, it is determined that the simulation accuracy of the one-dimensional power economy simulation model is high, and therefore, the optimal economic curve and the first shifting strategy of the engine can continue to be obtained. When the error between the first fuel consumption test parameter and the second fuel consumption test parameter is greater than the error threshold, the structural parameters and state parameters of the target vehicle are re-acquired, and the one-dimensional power economy simulation model of the target vehicle is constructed according to the structural parameters and state parameters of the target vehicle until the error between the first fuel consumption test parameter and the second fuel consumption test parameter is less than or equal to the error threshold.

[0103] It should be noted that the error threshold can be set in advance according to needs, for example, the error threshold can be 3%, 5%, etc.

[0104] In some embodiments, the operation of the terminal obtaining the first gear shifting strategy of the engine of the target vehicle includes: obtaining the pedal correspondence and basic gear shifting strategy of the target vehicle, the pedal correspondence includes the correspondence between the throttle opening, the engine speed and the engine torque of the target vehicle, and the basic gear shifting strategy includes the correspondence between the vehicle speed, the throttle opening and the engine speed of the target vehicle; according to the pedal correspondence and the basic gear shifting strategy, determining the torque correspondence of the target vehicle, the torque correspondence includes the correspondence between the vehicle speed, the throttle opening and the engine torque of the target vehicle; according to the torque correspondence, determining the first gear shifting strategy.

[0105] It should be noted that the basic shift strategy is a shift measurement designed in advance for the engine of the target vehicle. The pedal correspondence can be a correspondence set in advance, or it can be determined by the terminal after simulating the engine through a one-dimensional power economy simulation model, or it can be obtained by the terminal after testing the target vehicle under test conditions.

[0106] Since the pedal correspondence includes the correspondence between the throttle opening, engine speed and engine torque of the target vehicle, and the basic shifting strategy includes the correspondence between the vehicle speed, throttle opening and engine speed of the target vehicle, the terminal can determine the correspondence between the vehicle speed, engine torque and throttle opening of the target vehicle based on the throttle opening and engine speed.

[0107] In some embodiments, since the torque correspondence includes the correspondence between the target vehicle's speed, throttle opening and engine torque, the terminal determines the engine power requirements corresponding to different engine torques and engine speeds based on the torque correspondence by using the following first formula, thereby determining the engine power requirements corresponding to different vehicle speeds and throttles, that is, the first shifting strategy.

[0108] P=T*n / 9550 (1)

[0109] It should be noted that, in the above first formula (1), P is the engine power demand, n is the engine speed, and T is the engine torque.

[0110] Step 202: The terminal determines a second gear shifting strategy of the engine according to the optimal economic curve.

[0111] It should be noted that the second shift strategy includes the corresponding relationship between the engine required power and the engine speed.

[0112] From the above, it can be seen that the optimal economic curve includes the correspondence between engine speed and engine torque. Therefore, the terminal can determine the correspondence between engine speed and engine demand power according to the correspondence between engine speed and engine torque in the optimal economic curve through the above first formula.

[0113] In one implementation environment, the terminal can determine the corresponding relationship between the engine speed and the engine required power as shown in Table 1 below based on the optimal economic curve.

[0114] Table 1

[0115] Engine power required (kw) 10 20 … 110 120 Engine speed (rpm) N1 N2 … N11 N12

[0116] Step 203: The terminal performs interpolation processing on the second gear shift strategy through the first gear shift strategy to obtain an optimized gear shift strategy for the target vehicle.

[0117] In order to improve the accuracy of the optimized gear shift strategy, the terminal can interpolate the second gear shift strategy through the first gear shift strategy to obtain the optimized gear shift strategy of the target vehicle.

[0118] In some embodiments, the terminal interpolates the second gear shift strategy through the first gear shift strategy to obtain an optimized gear shift strategy for the target vehicle, and the operation includes at least: interpolating the second gear shift strategy through the first gear shift strategy to obtain a reference gear shift strategy; simulating the reference gear shift strategy in a one-dimensional power economy simulation model of the target vehicle to obtain a simulation result; when the simulation result meets the test requirements, determining that the reference gear shift strategy is the optimized gear shift strategy.

[0119] In some embodiments, the terminal can directly determine the reference shift strategy as the optimized shift strategy of the target vehicle. However, in order to avoid other effects of the optimized shift strategy on the target vehicle, the terminal can verify the reference shift strategy. That is, the terminal can simulate the reference shift strategy in a one-dimensional power economy simulation model of the target vehicle to obtain a simulation result; when the simulation result meets the test requirements, the reference shift strategy is determined to be the optimized shift strategy. When the simulation result does not meet the test requirements, the operation of step 201 is re-executed.

[0120] It should be noted that the test requirements can be set in advance according to needs.

[0121] Step 204: The terminal prompts the optimized shift strategy through prompt information.

[0122] It should be noted that the prompt information can be in at least one form of prompt information such as voice, text, video, etc.

[0123] In an embodiment of the present application, the terminal can optimize the shifting strategy of the target vehicle through the optimal economic curve of the engine of the target vehicle and the first shifting strategy, so that the operating conditions of the engine are close to the optimal economic curve, thereby not only reducing fuel consumption, but also not increasing the project development cost, and being able to keep the power of the target vehicle unchanged.

[0124] Figure 3 30 is a schematic diagram of a structure of a vehicle shift strategy optimization device provided in an embodiment of the present application. The vehicle shift strategy optimization device can be implemented by software, hardware or a combination of the two. The vehicle shift strategy optimization device can include: a first acquisition module 301, a determination module 302 and an interpolation module 303.

[0125] A first acquisition module 301 is used to acquire an optimal economy curve and a first shifting strategy of an engine of a target vehicle, wherein the first shifting strategy includes the engine power requirements of the target vehicle at different vehicle speeds and throttles, and the optimal economy curve includes a corresponding relationship between the engine speed and the engine torque, and the target vehicle is a prototype vehicle in a development state;

[0126] A determination module 302, configured to determine a second shifting strategy of the engine according to the optimal economic curve, wherein the second shifting strategy includes a corresponding relationship between the engine required power and the engine speed;

[0127] The interpolation module 303 is used to perform interpolation processing on the second gear shift strategy through the first gear shift strategy to obtain the optimized gear shift strategy of the target vehicle.

[0128] In some embodiments, see Figure 4 , the device further comprises:

[0129] The second acquisition module 304 is used to acquire the structural parameters and state parameters of the target vehicle;

[0130] A construction module 305 is used to construct a one-dimensional power economy simulation model of the target vehicle according to the structural parameters and state parameters of the target vehicle;

[0131] A test module 306 is used to perform fuel consumption tests on the target vehicle and the one-dimensional power economy simulation model respectively to obtain a first fuel consumption test parameter and a second fuel consumption test parameter;

[0132] The trigger module 307 is used to trigger the first acquisition module 301 to acquire the optimal economic curve and the first shifting strategy of the engine of the target vehicle when the error between the first fuel consumption test parameter and the second fuel consumption test parameter is less than or equal to the error threshold.

[0133] In some embodiments, see Figure 5, the interpolation module 303 includes:

[0134] An interpolation submodule 3031 is used to perform interpolation processing on the second gear shift strategy through the first gear shift strategy to obtain a reference gear shift strategy;

[0135] The test submodule 3032 is used to perform a simulation test on the reference shift strategy in the one-dimensional power economy simulation model of the target vehicle to obtain a simulation result;

[0136] The first determination submodule 3033 is used to determine that the reference shift strategy is the optimized shift strategy when the simulation result meets the test requirements.

[0137] In some embodiments, see Figure 6 , the first acquisition module 301 includes:

[0138] The first acquisition submodule 3011 is used to acquire the engine speed, throttle opening and engine torque of the target vehicle under the test condition;

[0139] The second determination submodule 3012 is used to determine the engine isopower line corresponding to the engine speed in the universal characteristic data diagram of the engine according to the engine speed, throttle opening and engine torque of the engine under the test condition, wherein the abscissa of the universal characteristic data diagram is the engine speed and the ordinate of the universal characteristic data diagram is the engine torque;

[0140] A search submodule 3013 is used to search the engine power corresponding to the lowest point of the fuel consumption rate on the engine isopower line according to the fuel consumption rate corresponding to the engine speed;

[0141] The third determining submodule 3014 is used to determine a curve consisting of the engine speed and the engine power corresponding to the lowest point of the fuel consumption rate as the optimal economic curve.

[0142] In some embodiments, see Figure 7 , the first acquisition module 301 includes:

[0143] The second acquisition submodule 3015 is used to acquire the pedal correspondence and basic shifting strategy of the target vehicle, wherein the pedal correspondence includes the correspondence between the throttle opening, the engine speed and the engine torque of the target vehicle, and the basic shifting strategy includes the correspondence between the vehicle speed, the throttle opening and the engine speed of the target vehicle;

[0144] The fourth determining submodule 3016 is used to determine the torque correspondence of the target vehicle according to the pedal correspondence and the basic shifting strategy, where the torque correspondence includes the correspondence between the vehicle speed, the throttle opening and the engine torque of the target vehicle;

[0145] The fifth determining submodule 3017 is configured to determine the first gear shifting strategy according to the torque correspondence.

[0146] In an embodiment of the present application, the terminal can optimize the shifting strategy of the target vehicle through the optimal economic curve of the engine of the target vehicle and the first shifting strategy, so that the operating conditions of the engine are close to the optimal economic curve, thereby not only reducing fuel consumption, but also not increasing the project development cost, and being able to keep the power of the target vehicle unchanged.

[0147] It should be noted that: the shift strategy optimization device for a car provided in the above embodiment only uses the division of the above functional modules as an example when optimizing the shift strategy of the car. In actual applications, the above functional distribution can be completed by different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the shift strategy optimization device for a car provided in the above embodiment and the shift strategy optimization method embodiment for a car belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0148] Figure 8 The structure block diagram of a terminal 800 provided by an exemplary embodiment of the present application is shown. The terminal 800 may be: a smart phone, a tablet computer, a notebook computer or a desktop computer. The terminal 800 may also be called a user equipment, a portable terminal, a laptop terminal, a desktop terminal or other names.

[0149] Typically, the terminal 800 includes a processor 801 and a memory 802 .

[0150] The processor 801 may include one or more processing cores, such as a 4-core processor, an 8-core processor, etc. The processor 801 may be implemented in at least one hardware form of DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). The processor 801 may also include a main processor and a coprocessor. The main processor is a processor for processing data in the awake state, also known as a CPU (Central Processing Unit); the coprocessor is a low-power processor for processing data in the standby state. In some embodiments, the processor 801 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor 801 may also include an AI (Artificial Intelligence) processor, which is used to process computing operations related to machine learning.

[0151] The memory 802 may include one or more computer-readable storage media, which may be non-transitory. The memory 802 may also include a high-speed random access memory, and a non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In some embodiments, the non-transitory computer-readable storage medium in the memory 802 is used to store at least one instruction, which is used to be executed by the processor 801 to implement the shift strategy optimization method for the automobile provided in the method embodiment of the present application.

[0152] In some embodiments, the terminal 800 may further optionally include: a peripheral device interface 803 and at least one peripheral device. The processor 801, the memory 802 and the peripheral device interface 803 may be connected via a bus or a signal line. Each peripheral device may be connected to the peripheral device interface 803 via a bus, a signal line or a circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 804, a display screen 805, a camera assembly 806, an audio circuit 807, a positioning assembly 808 and a power supply 809.

[0153] The peripheral device interface 803 may be used to connect at least one peripheral device related to I / O (Input / Output) to the processor 801 and the memory 802. In some embodiments, the processor 801, the memory 802, and the peripheral device interface 803 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 801, the memory 802, and the peripheral device interface 803 may be implemented on a separate chip or circuit board, which is not limited in this embodiment.

[0154] The radio frequency circuit 804 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuit 804 communicates with communication networks and other communication devices through electromagnetic signals. The radio frequency circuit 804 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals into electrical signals. Optionally, the radio frequency circuit 804 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, and the like. The radio frequency circuit 804 can communicate with other terminals through at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: a metropolitan area network, various generations of mobile communication networks (2G, 3G, 4G and 5G), a wireless local area network and / or a WiFi (Wireless Fidelity) network. In some embodiments, the radio frequency circuit 804 may also include circuits related to NFC (Near Field Communication), which is not limited in this application.

[0155] The display screen 805 is used to display the UI (User Interface). The UI may include graphics, text, icons, videos and any combination thereof. When the display screen 805 is a touch display screen, the display screen 805 also has the ability to collect touch signals on the surface or above the surface of the display screen 805. The touch signal can be input to the processor 801 as a control signal for processing. At this time, the display screen 805 can also be used to provide virtual buttons and / or virtual keyboards, also known as soft buttons and / or soft keyboards. In some embodiments, the display screen 805 can be one, and the front panel of the terminal 800 is set; in other embodiments, the display screen 805 can be at least two, which are respectively set on different surfaces of the terminal 800 or are folded; in other embodiments, the display screen 805 can be a flexible display screen, which is set on the curved surface or folded surface of the terminal 800. Even, the display screen 805 can also be set to a non-rectangular irregular shape, that is, a special-shaped screen. The display screen 805 can be made of materials such as LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode, organic light-emitting diode).

[0156] The camera assembly 806 is used to capture images or videos. Optionally, the camera assembly 806 includes a front camera and a rear camera. Typically, the front camera is arranged on the front panel of the terminal, and the rear camera is arranged on the back of the terminal. In some embodiments, there are at least two rear cameras, which are any one of a main camera, a depth of field camera, a wide-angle camera, and a telephoto camera, so as to realize the fusion of the main camera and the depth of field camera to realize the background blur function, the fusion of the main camera and the wide-angle camera to realize panoramic shooting and VR (Virtual Reality) shooting function or other fusion shooting functions. In some embodiments, the camera assembly 806 may also include a flash. The flash can be a monochrome temperature flash or a dual-color temperature flash. A dual-color temperature flash refers to a combination of a warm light flash and a cold light flash, which can be used for light compensation at different color temperatures.

[0157] The audio circuit 807 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, and convert the sound waves into electrical signals and input them into the processor 801 for processing, or input them into the radio frequency circuit 804 to achieve voice communication. For the purpose of stereo acquisition or noise reduction, there may be multiple microphones, which are respectively arranged at different parts of the terminal 800. The microphone may also be an array microphone or an omnidirectional acquisition microphone. The speaker is used to convert the electrical signal from the processor 801 or the radio frequency circuit 804 into sound waves. The speaker may be a traditional film speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can not only convert the electrical signal into sound waves audible to humans, but also convert the electrical signal into sound waves inaudible to humans for purposes such as ranging. In some embodiments, the audio circuit 807 may also include a headphone jack.

[0158] The positioning component 808 is used to locate the current geographical location of the terminal 800 to implement navigation or LBS (Location Based Service). The positioning component 808 can be a positioning component based on the US GPS (Global Positioning System), China's Beidou system, Russia's Grenas system or the European Union's Galileo system.

[0159] The power supply 809 is used to power various components in the terminal 800. The power supply 809 can be an alternating current, a direct current, a disposable battery, or a rechargeable battery. When the power supply 809 includes a rechargeable battery, the rechargeable battery can support wired charging or wireless charging. The rechargeable battery can also be used to support fast charging technology.

[0160] In some embodiments, the terminal 800 further includes one or more sensors 810 , including but not limited to: an acceleration sensor 811 , a gyroscope sensor 812 , a pressure sensor 813 , a fingerprint sensor 814 , an optical sensor 815 , and a proximity sensor 816 .

[0161] The acceleration sensor 811 can detect the magnitude of acceleration on the three coordinate axes of the coordinate system established by the terminal 800. For example, the acceleration sensor 811 can be used to detect the components of gravity acceleration on the three coordinate axes. The processor 801 can control the display screen 805 to display the user interface in a horizontal view or a vertical view according to the gravity acceleration signal collected by the acceleration sensor 811. The acceleration sensor 811 can also be used to collect game or user motion data.

[0162] The gyroscope sensor 812 can detect the body direction and rotation angle of the terminal 800, and the gyroscope sensor 812 can cooperate with the acceleration sensor 811 to collect the user's 3D actions on the terminal 800. The processor 801 can implement the following functions based on the data collected by the gyroscope sensor 812: motion sensing (such as changing the UI according to the user's tilt operation), image stabilization during shooting, game control, and inertial navigation.

[0163] The pressure sensor 813 can be set on the side frame of the terminal 800 and / or the lower layer of the display screen 805. When the pressure sensor 813 is set on the side frame of the terminal 800, it can detect the user's holding signal of the terminal 800, and the processor 801 performs left and right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 813. When the pressure sensor 813 is set on the lower layer of the display screen 805, the processor 801 controls the operability controls on the UI interface according to the user's pressure operation on the display screen 805. The operability controls include at least one of a button control, a scroll bar control, an icon control, and a menu control.

[0164] The fingerprint sensor 814 is used to collect the user's fingerprint, and the processor 801 identifies the user's identity based on the fingerprint collected by the fingerprint sensor 814, or the fingerprint sensor 814 identifies the user's identity based on the collected fingerprint. When the user's identity is identified as a trusted identity, the processor 801 authorizes the user to perform relevant sensitive operations, which include unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings. The fingerprint sensor 814 can be set on the front, back, or side of the terminal 800. When a physical button or a manufacturer logo is set on the terminal 800, the fingerprint sensor 814 can be integrated with the physical button or the manufacturer logo.

[0165] The optical sensor 815 is used to collect the ambient light intensity. In one embodiment, the processor 801 can control the display brightness of the display screen 805 according to the ambient light intensity collected by the optical sensor 815. Specifically, when the ambient light intensity is high, the display brightness of the display screen 805 is increased; when the ambient light intensity is low, the display brightness of the display screen 805 is reduced. In another embodiment, the processor 801 can also dynamically adjust the shooting parameters of the camera assembly 806 according to the ambient light intensity collected by the optical sensor 815.

[0166] The proximity sensor 816, also called a distance sensor, is usually disposed on the front panel of the terminal 800. The proximity sensor 816 is used to collect the distance between the user and the front of the terminal 800. In one embodiment, when the proximity sensor 816 detects that the distance between the user and the front of the terminal 800 is gradually decreasing, the processor 801 controls the display screen 805 to switch from the screen-on state to the screen-off state; when the proximity sensor 816 detects that the distance between the user and the front of the terminal 800 is gradually increasing, the processor 801 controls the display screen 805 to switch from the screen-off state to the screen-on state.

[0167] Those skilled in the art will understand that Figure 8 The structure shown in the figure does not constitute a limitation on the terminal 800, and the terminal 800 may include more or less components than those shown in the figure, or combine some components, or adopt a different component arrangement.

[0168] The embodiment of the present application also provides a non-temporary computer-readable storage medium. When the instructions in the storage medium are executed by the processor of the terminal, the terminal is enabled to execute the automobile shift strategy optimization method provided in the above embodiment.

[0169] The embodiment of the present application also provides a computer program product containing instructions, which, when executed on a terminal, enables the terminal to execute the method for optimizing the gear shift strategy of a vehicle provided in the above embodiment.

[0170] A person skilled in the art will understand that all or part of the steps to implement the above embodiments may be accomplished by hardware or by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a disk or an optical disk, etc.

[0171] The above description is only a preferred embodiment of the embodiments of the present application and is not intended to limit the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A method for optimizing a shift strategy of an automobile, characterized in that: The method comprises: Obtaining an optimal economy curve and a first shifting strategy of an engine of a target vehicle, wherein the first shifting strategy includes engine power requirements corresponding to different vehicle speeds and throttle openings of the target vehicle, and the optimal economy curve includes a corresponding relationship between engine speed and engine torque, wherein the target vehicle is a prototype vehicle in a development state; Determining a second shifting strategy of the engine according to the optimal economic curve, wherein the second shifting strategy includes a corresponding relationship between the engine required power and the engine speed; Interpolating the second shift strategy through the first shift strategy to obtain a reference shift strategy; The reference shifting strategy is simulated and tested in a one-dimensional power economy simulation model of the target vehicle to obtain a simulation result; When the simulation result meets the test requirements, determining the reference shift strategy as the optimized shift strategy of the target vehicle; Wherein, the step of obtaining the first shift strategy of the engine of the target vehicle includes: Acquire a pedal correspondence and a basic shifting strategy of the target vehicle, wherein the pedal correspondence includes a correspondence between a throttle opening, an engine speed, and an engine torque of the target vehicle, and the basic shifting strategy includes a correspondence between a vehicle speed, a throttle opening, and an engine speed of the target vehicle; Determining a torque correspondence of the target vehicle according to the pedal correspondence and the basic shifting strategy, wherein the torque correspondence includes a correspondence between a vehicle speed, an accelerator opening, and an engine torque of the target vehicle; The first gear shifting strategy is determined according to the torque correspondence.

2. The method according to claim 1, characterized in that Before obtaining the optimal economic curve and the first shifting strategy of the engine of the target vehicle, the method further includes: Acquiring structural parameters and state parameters of the target vehicle; Constructing a one-dimensional power economy simulation model of the target vehicle according to the structural parameters and state parameters of the target vehicle; Performing fuel consumption tests on the target vehicle and the one-dimensional power economy simulation model respectively to obtain a first fuel consumption test parameter and a second fuel consumption test parameter; When the error between the first fuel consumption test parameter and the second fuel consumption test parameter is less than or equal to an error threshold, the operation of obtaining the optimal economic curve of the engine of the target vehicle and the first shifting strategy is performed.

3. The method according to claim 1, characterized in that The step of obtaining the optimal economic curve of the engine of the target vehicle comprises: Obtaining the engine speed, throttle opening and engine torque of the engine of the target vehicle under the test conditions; According to the engine speed, throttle opening and engine torque of the engine under the test working condition, in the universal characteristic data diagram of the engine, determining the engine isopower line corresponding to the engine speed, wherein the abscissa of the universal characteristic data diagram is the engine speed, and the ordinate of the universal characteristic data diagram is the engine torque; According to the fuel consumption rate corresponding to the engine speed, find the engine power corresponding to the lowest point of the fuel consumption rate on the engine isopower line; The curve consisting of the engine speed and the engine power corresponding to the lowest point of the fuel consumption rate is determined as the optimal economic curve.

4. A vehicle shift strategy optimization device, characterized in that: The device comprises: a first acquisition module, for acquiring an optimal economy curve and a first shifting strategy of an engine of a target vehicle, wherein the first shifting strategy includes engine power requirements corresponding to different vehicle speeds and throttle openings of the target vehicle, and the optimal economy curve includes a corresponding relationship between engine speed and engine torque, and the target vehicle is a prototype vehicle in a development state; a determination module, configured to determine a second shifting strategy of the engine according to the optimal economic curve, wherein the second shifting strategy includes a corresponding relationship between the engine required power and the engine speed; The interpolation module includes: an interpolation submodule, which is used to interpolate the second shift strategy through the first shift strategy to obtain a reference shift strategy; a test submodule, which is used to simulate the reference shift strategy in the one-dimensional power economy simulation model of the target vehicle to obtain a simulation result; a first determination submodule, which is used to determine that the reference shift strategy is the optimized shift strategy of the target vehicle when the simulation result meets the test requirements; Wherein, the first acquisition module includes: A second acquisition submodule is used to acquire a pedal correspondence relationship and a basic shifting strategy of the target vehicle, wherein the pedal correspondence relationship includes a correspondence relationship between a throttle opening, an engine speed, and an engine torque of the target vehicle, and the basic shifting strategy includes a correspondence relationship between a vehicle speed, a throttle opening, and an engine speed of the target vehicle; A fourth determination submodule, configured to determine a torque correspondence of the target vehicle according to the pedal correspondence and the basic shifting strategy, wherein the torque correspondence includes a correspondence between a vehicle speed, an accelerator opening, and an engine torque of the target vehicle; The fifth determining submodule is used to determine the first gear shifting strategy according to the torque correspondence.

5. The device according to claim 4, characterized in that The device also includes: A second acquisition module is used to acquire the structural parameters and state parameters of the target vehicle; A construction module, used to construct a one-dimensional power economy simulation model of the target vehicle according to the structural parameters and state parameters of the target vehicle; A test module, used to perform fuel consumption tests on the target vehicle and the one-dimensional power economy simulation model respectively, to obtain a first fuel consumption test parameter and a second fuel consumption test parameter; The trigger module is used to trigger the first acquisition module to acquire the optimal economic curve and the first shifting strategy of the engine of the target vehicle when the error between the first fuel consumption test parameter and the second fuel consumption test parameter is less than or equal to the error threshold.

6. The device according to claim 4, characterized in that The first acquisition module includes: A first acquisition submodule is used to acquire the engine speed, throttle opening and engine torque of the engine of the target vehicle under the test condition; A second determination submodule is used to determine an engine isopower line corresponding to the engine speed in a universal characteristic data diagram of the engine according to the engine speed, throttle opening and engine torque of the engine under the test condition, wherein the abscissa of the universal characteristic data diagram is the engine speed and the ordinate of the universal characteristic data diagram is the engine torque; A search submodule, for searching the engine power corresponding to the lowest point of the fuel consumption rate on the engine isopower line according to the fuel consumption rate corresponding to the engine speed; The third determination submodule is used to determine a curve consisting of the engine speed and the engine power corresponding to the lowest point of the fuel consumption rate as the optimal economic curve.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed by a processor, the steps of the method described in any one of claims 1 to 3 are implemented.

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