CN114117789A - Gear shifting strategy optimization method and device for automobile and computer storage medium - Google Patents
Gear shifting strategy optimization method and device for automobile and computer storage medium Download PDFInfo
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- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
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Abstract
The embodiment of the application discloses a gear shifting strategy optimization method and device for an automobile and a computer storage medium, and belongs to the technical field of automobiles. The method comprises the following steps: the method comprises the steps of obtaining an optimal economic curve and a first gear shifting strategy of an engine of a target automobile, wherein the optimal economic curve comprises the corresponding relation between the engine speed and the engine torque, and the target automobile is a sample automobile in a development state; determining a second gear shifting strategy of the engine according to the optimal economic curve, wherein the second gear shifting strategy comprises the corresponding relation between the required power of the engine and the rotating speed of the engine; and carrying out interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain the gear shifting strategy after the target automobile is optimized. According to the gear shifting strategy optimization method and device for the target automobile, the gear shifting strategy of the target automobile is optimized, so that the operation working condition of the engine is close to the optimal economic curve, oil consumption is reduced, meanwhile, project development cost is not increased, and the dynamic property of the target automobile can be kept unchanged.
Description
Technical Field
The embodiment of the application relates to the technical field of automobiles, in particular to a gear shifting strategy optimization method and device for an automobile and a computer storage medium.
Background
Along with the development of social economy, the popularization rate of automobiles is continuously improved, and automatic transmission automobiles have the advantages of convenience in operation, safety, labor saving and the like, and are more and more popular. In this case, automatic transmission vehicles do not manually adjust the transmission of the vehicle by the driver, but automatically adjust the transmission of the vehicle according to a gear shift strategy (also referred to as a gear shift map) in the vehicle. With increasingly strict fuel consumption regulations of automobiles, in order to reduce fuel consumption of automobiles, gear shifting strategies of automobiles are generally adjusted.
At present, when an automobile gear shifting strategy is adjusted, the gear shifting rotating speed in the gear shifting strategy is generally reduced integrally, so that the oil consumption of a vehicle is reduced.
However, although fuel efficiency of the vehicle can be reduced by reducing the shift speed, the dynamic performance of the vehicle is also reduced, resulting in poor dynamic performance.
Disclosure of Invention
The embodiment of the application provides a gear shifting strategy optimization method and device for an automobile and a computer storage medium, which can be used for solving the problem of poor dynamic performance of the automobile when the gear shifting strategy is optimized in the related technology. The technical scheme is as follows:
in one aspect, a method for optimizing a gear shift strategy of a vehicle is provided, the method comprising:
the method comprises the steps that an optimal economic curve and a first gear shifting strategy of an engine of a target automobile are obtained, wherein the first gear shifting strategy comprises corresponding engine power requirements of the target automobile under throttle valves with different speeds, the optimal economic curve comprises a corresponding relation between engine rotating speed and engine torque, and the target automobile is a sample automobile in a development state;
determining a second gear shifting strategy of the engine according to the optimal economic curve, wherein the second gear shifting strategy comprises a corresponding relation between the required power of the engine and the rotating speed of the engine;
and carrying out interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain the optimized gear shifting strategy of the target automobile.
In some embodiments, before obtaining the optimal economic curve of the engine of the target vehicle and the first gear shift strategy, the method further comprises:
acquiring structural parameters and state parameters of the target automobile;
according to the structural parameters and the state parameters of the target automobile, a one-dimensional dynamic economy simulation model of the target automobile is constructed;
respectively carrying out oil consumption testing on the target automobile and the one-dimensional power economy simulation model to obtain a first oil consumption testing parameter and a second oil consumption testing parameter;
and when the error between the first oil consumption testing parameter and the second oil consumption testing parameter is smaller than or equal to an error threshold value, executing the operation of obtaining the optimal economic curve of the engine of the target automobile and the first gear shifting strategy.
In some embodiments, the interpolating the second shift schedule by the first shift schedule to obtain the optimized shift schedule of the target vehicle includes:
interpolating the second gear shifting strategy through the first gear shifting strategy to obtain a reference gear shifting strategy;
carrying out simulation test on the reference gear shifting strategy in a one-dimensional power economy simulation model of the target automobile to obtain a simulation result;
and when the simulation result meets the test requirement, determining the reference gear shifting strategy as the optimized gear shifting strategy.
In some embodiments, the obtaining an optimal economic curve for an engine of a target vehicle includes:
acquiring the engine speed, the accelerator opening and the engine torque of the engine of the target automobile under the test working condition;
according to the engine speed, the accelerator opening and the engine torque of the engine under the test working condition, determining an engine equal power line corresponding to the engine speed in a universal characteristic data graph of the engine, wherein the abscissa of the universal characteristic data graph is the engine speed, and the ordinate of the universal characteristic data graph is the engine torque;
according to the fuel consumption rate corresponding to the engine rotating speed, searching the engine power corresponding to the lowest fuel consumption rate on the equal power line of the engine;
and determining a curve consisting of the engine power corresponding to the lowest point of the engine speed and the fuel consumption rate as the optimal economic curve.
In some embodiments, the obtaining a first shift schedule of an engine of a target vehicle comprises:
acquiring a pedal corresponding relation and a basic gear shifting strategy of the target automobile, wherein the pedal corresponding relation comprises a corresponding relation of an accelerator opening, an engine rotating speed and an engine torque of the target automobile, and the basic gear shifting strategy comprises a corresponding relation of a speed, the accelerator opening and the engine rotating speed of the target automobile;
determining a torque corresponding relation of the target automobile according to the pedal corresponding relation and the basic gear shifting strategy, wherein the torque corresponding relation comprises the corresponding relation of the speed, the accelerator opening and the engine torque of the target automobile;
and determining the first gear shifting strategy according to the torque corresponding relation.
In another aspect, a gear shift strategy optimization apparatus for a vehicle is provided, the apparatus comprising:
the system comprises a first obtaining module, a second obtaining module and a third obtaining module, wherein the first obtaining module is used for obtaining an optimal economic curve and a first gear shifting strategy of an engine of a target automobile, the first gear shifting strategy comprises corresponding engine power requirements of the target automobile under different speed throttle, the optimal economic curve comprises a corresponding relation between an engine rotating speed and an engine torque, and the target automobile is a sample automobile in a development state;
a determination module for determining a second shift strategy for the engine based on the optimal economy curve, the second shift strategy comprising a correspondence between the engine power demand and the engine speed;
and the interpolation module is used for carrying out interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain the optimized gear shifting strategy of the target automobile.
In some embodiments, the apparatus further comprises:
the second acquisition module is used for acquiring the structural parameters and the state parameters of the target automobile;
the construction module is used for constructing a one-dimensional dynamic economy simulation model of the target automobile according to the structural parameters and the state parameters of the target automobile;
the test module is used for respectively carrying out oil consumption test on the target automobile and the one-dimensional power economy simulation model to obtain a first oil consumption test parameter and a second oil consumption test parameter;
the triggering module is used for triggering the first obtaining module to obtain the optimal economic curve and the first gear shifting strategy of the engine of the target automobile when the error between the first oil consumption testing parameter and the second oil consumption testing parameter is smaller than or equal to an error threshold value.
In some embodiments, the interpolation module comprises:
the interpolation sub-module is used for carrying out interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain a reference gear shifting strategy;
the test sub-module is used for carrying out simulation test on the reference gear shifting strategy in a one-dimensional power economy simulation model of the target automobile to obtain a simulation result;
and the first determining submodule is used for determining the reference gear shifting strategy as the optimized gear shifting strategy when the simulation result meets the test requirement.
In some embodiments, the first obtaining module comprises:
the first obtaining submodule is used for obtaining the engine speed, the accelerator opening and the engine torque of the engine of the target automobile under the test working condition;
the second determining submodule is used for determining an engine equal-power line corresponding to the engine speed in a universal characteristic data graph of the engine according to the engine speed, the accelerator opening and the engine torque of the engine under the test working condition, the abscissa of the universal characteristic data graph is the engine speed, and the ordinate of the universal characteristic data graph is the engine torque;
the searching submodule is used for searching the engine power corresponding to the lowest fuel consumption rate on the equal power line of the engine according to the fuel consumption rate corresponding to the rotating speed of the engine;
and the third determining submodule is used for determining a curve formed by the engine power corresponding to the lowest point of the engine speed and the fuel consumption rate as the optimal economic curve.
In some embodiments, the first obtaining module comprises:
the second obtaining submodule is used for obtaining a pedal corresponding relation and a basic gear shifting strategy of the target automobile, wherein the pedal corresponding relation comprises a corresponding relation of an accelerator opening, an engine rotating speed and an engine torque of the target automobile, and the basic gear shifting strategy comprises a corresponding relation of a speed, the accelerator opening and the engine rotating speed of the target automobile;
a fourth determining submodule, configured to determine a torque correspondence of the target vehicle according to the pedal correspondence and the basic shift strategy, where the torque correspondence includes a correspondence between a vehicle speed, an accelerator opening, and an engine torque of the target vehicle;
and the fifth determining submodule is used for determining the first gear shifting strategy according to the torque corresponding relation.
In another aspect, a computer readable storage medium is provided, having instructions stored thereon, which when executed by a processor, implement any of the above described gear shift strategy optimization methods for a vehicle.
The beneficial effects brought by the technical scheme provided by the embodiment of the application at least comprise:
in the embodiment of the application, the gear shifting strategy of the target automobile can be optimized through the optimal economic curve and the first gear shifting strategy of the engine of the target automobile, so that the operation condition of the engine is close to the optimal economic curve, the oil consumption is reduced, the project development cost is not increased, and the dynamic property of the target automobile can be kept unchanged.
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In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flowchart of a method for optimizing a shift strategy of a vehicle according to an embodiment of the present disclosure;
FIG. 2 is a flowchart of another method for optimizing a shift strategy of a vehicle according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a shift strategy optimization device for a vehicle according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of another shift strategy optimization device for a vehicle according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of an interpolation module according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a first obtaining module according to an embodiment of the present disclosure;
fig. 7 is a schematic structural diagram of another first obtaining module provided in an embodiment of the present application;
fig. 8 is a schematic structural diagram of a terminal according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present application more clear, the embodiments of the present application will be further described in detail with reference to the accompanying drawings.
Before explaining the gear shift strategy optimization method for the vehicle provided by the embodiment of the present application in detail, an application scenario provided by the embodiment of the present application is explained first.
With the development of social economy, the automobile popularity is continuously improved. However, with the promotion of energy conservation and emission reduction, the limit value of the fuel consumption of the automobile is increasingly strict, automobile manufacturers begin to apply various fuel saving measures to reduce the oil consumption of the whole automobile, for example, the oil consumption is reduced by an engine idling start-stop system, a storage battery intelligent charging system, a variable air inlet grille, a low rolling resistance tire and the like, but the negative effect of the reduction is the continuous increase of the cost of the whole automobile. Therefore, the fuel consumption of the vehicle is reduced by selecting a mode of reducing the whole shift speed in the shift strategy. However, although fuel efficiency of the vehicle can be reduced by reducing the shift speed, the dynamic performance of the vehicle is also reduced, resulting in poor dynamic performance.
Based on the application scene, the embodiment of the application provides the gear shifting strategy optimization method for the automobile, which can reduce the whole automobile cost and ensure the dynamic property of the automobile.
Fig. 1 is a flowchart of a method for optimizing a gear shift strategy of an automobile according to an embodiment of the present application, where the method for optimizing a gear shift strategy of an automobile may include the following steps:
step 101: the method comprises the steps of obtaining an optimal economic curve and a first gear shifting strategy of an engine of a target automobile, wherein the first gear shifting strategy comprises corresponding engine power requirements of the target automobile under throttle valves with different speeds, the optimal economic curve comprises a corresponding relation between engine rotating speed and engine torque, and the target automobile is a sample automobile in a development state.
Step 102: determining a second shift strategy for the engine based on the optimal economy curve, the second shift strategy including a correspondence between the engine power demand and the engine speed.
Step 103: and carrying out interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain the optimized gear shifting strategy of the target automobile.
In the embodiment of the application, the gear shifting strategy of the target automobile can be optimized through the optimal economic curve and the first gear shifting strategy of the engine of the target automobile, so that the operation condition of the engine is close to the optimal economic curve, the oil consumption is reduced, the project development cost is not increased, and the dynamic property of the target automobile can be kept unchanged.
In some embodiments, before the obtaining the optimal economy curve and the first shift schedule for the engine of the target vehicle, the method further comprises:
acquiring the structural parameters and the state parameters of the target automobile;
according to the structural parameters and the state parameters of the target automobile, a one-dimensional dynamic economy simulation model of the target automobile is constructed;
respectively carrying out oil consumption testing on the target automobile and the one-dimensional power economy simulation model to obtain a first oil consumption testing parameter and a second oil consumption testing parameter;
and when the error between the first fuel consumption testing parameter and the second fuel consumption testing parameter is less than or equal to the error threshold value, executing the operation of acquiring the optimal economic curve of the engine of the target automobile and the first gear shifting strategy.
In some embodiments, the interpolating the second shift schedule by the first shift schedule to obtain the optimized shift schedule of the target vehicle includes:
performing interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain a reference gear shifting strategy;
carrying out simulation test on the reference gear shifting strategy in a one-dimensional power economy simulation model of the target automobile to obtain a simulation result;
and when the simulation result meets the test requirement, determining the reference gear shifting strategy as the optimized gear shifting strategy.
In some embodiments, the obtaining an optimal economic curve for the engine of the target vehicle includes:
obtaining the engine speed, the accelerator opening and the engine torque of an engine of the target automobile under a test working condition;
according to the engine speed, the accelerator opening and the engine torque of the engine under the test working condition, determining an engine equal power line corresponding to the engine speed in a universal characteristic data graph of the engine, wherein the abscissa of the universal characteristic data graph is the engine speed, and the ordinate of the universal characteristic data graph is the engine torque;
according to the fuel consumption rate corresponding to the engine rotating speed, searching the engine power corresponding to the lowest fuel consumption rate on the equal power line of the engine;
and determining the curve of the engine power composition corresponding to the lowest point of the engine speed and the fuel consumption rate as the optimal economic curve.
In some embodiments, the obtaining a first shift schedule for an engine of a target vehicle includes:
acquiring a pedal corresponding relation and a basic gear shifting strategy of the target automobile, wherein the pedal corresponding relation comprises a corresponding relation of an accelerator opening, an engine rotating speed and an engine torque of the target automobile, and the basic gear shifting strategy comprises a corresponding relation of a speed, the accelerator opening and the engine rotating speed of the target automobile;
determining a torque corresponding relation of the target automobile according to the pedal corresponding relation and the basic gear shifting strategy, wherein the torque corresponding relation comprises the corresponding relation of the speed, the accelerator opening and the engine torque of the target automobile;
and determining the first gear shifting strategy according to the torque corresponding relation.
All the above optional technical solutions can be combined arbitrarily to form an optional embodiment of the present application, and the present application embodiment is not described in detail again.
Fig. 2 is a flowchart of a method for optimizing a gear shift strategy of an automobile according to an embodiment of the present invention, which is illustrated by applying the method for optimizing a gear shift strategy of an automobile to a terminal, and the method for optimizing a gear shift strategy of an automobile may include the following steps:
step 201: the terminal obtains an optimal economic curve and a first gear shifting strategy of an engine of a target automobile.
It should be noted that the first shift strategy includes engine power demands of target vehicles at different vehicle speeds, the optimal economy curve includes a corresponding relationship between an engine speed and an engine torque, the target vehicle is a prototype vehicle in a development state, and a model of the target vehicle can be a CVT (Continuously Variable Transmission) model. The optimal economic curve of the target automobile can reflect the lowest oil consumption of the target automobile under the condition of keeping the dynamic property not reduced.
Since the optimal economic curve of the target automobile can reflect the corresponding minimum fuel consumption of the target automobile under the condition of keeping the dynamic property not reduced, the terminal can acquire the optimal economic curve of the engine of the target automobile.
As an example, the operation of the terminal to obtain the optimal economic curve of the engine of the target vehicle includes: acquiring the engine speed, the accelerator opening and the engine torque of an engine of a target automobile under a test working condition; according to the engine speed, the accelerator opening and the engine torque of the engine under the test working condition, determining an engine equal power line corresponding to the engine speed in a universal characteristic data graph of the engine, wherein the abscissa of the universal characteristic data graph is the engine speed, and the ordinate of the universal characteristic data graph is the engine torque; according to the fuel consumption rate corresponding to the rotating speed of the engine, searching the engine power corresponding to the lowest fuel consumption rate on an engine equal power line; and determining a curve of the engine power composition corresponding to the lowest point of the engine speed and the fuel consumption rate as an optimal economic curve.
It should be noted that the target automobile can be a development sample automobile with PE performance in the middle stage of project development, and the complete automobile state and related parameters of the development sample automobile are obtained, so that the target automobile has test conditions, and therefore, a user can test the target automobile under a test working condition, so that the terminal obtains test data such as the engine speed, the accelerator opening degree, the engine torque and the like of the engine of the target automobile under the test working condition. The experimental working condition can be any working condition encountered by the target automobile in the running process.
It should be noted that, under the test condition of the transmitter, the terminal can obtain not only the rotation speed, the accelerator opening and the engine torque of the transmitter, but also other data, such as external characteristics and universal characteristic data of the engine.
Because the universal characteristic data chart of the transmitter shows the curves of the output torque of the engine, the rotating speed of the engine, the effective pressure of a cylinder and the fuel consumption per unit power time, the terminal can determine the universal characteristic data chart of the target automobile engine by means of a preset MATLAB M file according to the external characteristic, the universal characteristic data and other data of the engine, and determine the engine equal-power line corresponding to the rotating speed of the engine in the universal characteristic data chart of the engine according to the rotating speed of the engine, the opening degree of an accelerator and the torque of the engine under the test working condition.
It should be noted that, the operation of determining the universal characteristic data diagram of the target automobile engine by the terminal through the preset MATLAB M file according to the data such as the external characteristic and the universal characteristic data of the engine can refer to the related art, and details thereof are not repeated in the embodiment of the present application.
As an example, the terminal can obtain not only the engine speed, the accelerator opening and the engine torque of the engine of the target automobile under the test working condition, but also the engine speed, the accelerator opening and the engine torque of the engine of the target automobile under the test working condition through a one-dimensional power economy simulation model of the target automobile, wherein the one-dimensional power economy simulation model is used for simulating the power of the transmitter of the target automobile under various working conditions, and therefore the terminal can perform a simulation module on the test working condition of the engine through the one-dimensional power economy simulation model to obtain the engine speed, the accelerator opening and the engine torque of the engine under the test working condition.
In some embodiments, the one-dimensional power economy simulation model is obtained by the terminal before the optimal economy curve and the first gear shifting strategy of the engine of the target automobile are obtained, namely the terminal can also obtain the structural parameters and the state parameters of the target automobile before the optimal economy curve and the first gear shifting strategy of the engine of the target automobile are obtained; according to the structural parameters and the state parameters of the target automobile, a one-dimensional dynamic economy simulation model of the target automobile is constructed; respectively carrying out oil consumption testing on the target automobile and the one-dimensional power economy simulation model to obtain a first oil consumption testing parameter and a second oil consumption testing parameter; and when the error between the first fuel consumption testing parameter and the second fuel consumption testing parameter is less than or equal to the error threshold value, executing the operation of the step 201.
It should be noted that the structural parameter is a structural-related parameter of the target vehicle, and the state parameter refers to a parameter describing a current state of the vehicle, and includes, for example, a friction coefficient of the vehicle and the like. The terminal can establish the one-dimensional dynamic economy simulation model of the target automobile in the CRUISE application program, and the operation of establishing the one-dimensional dynamic economy simulation model of the target automobile by the terminal can refer to the related technology, which is not described in detail in the embodiment of the application.
In some embodiments, the terminal can also determine the simulation accuracy of the one-dimensional power economy simulation model on the engine in order to ensure the optimization effect on the gear shifting strategy of the engine. Therefore, the terminal can respectively carry out oil consumption testing on the target automobile and the one-dimensional power economy simulation model to obtain a first oil consumption testing parameter and a second oil consumption testing parameter; when the error between the first oil consumption testing parameter and the second oil consumption testing parameter is smaller than or equal to the error threshold value, the simulation accuracy of the one-dimensional power economy simulation model is determined to be high, and therefore the optimal economic curve and the first gear shifting strategy of the engine can be obtained continuously. And when the error between the first fuel consumption testing parameter and the second fuel consumption testing parameter is larger than the error threshold, re-obtaining the structural parameter and the state parameter of the target automobile, and constructing a one-dimensional power economy simulation model of the target automobile according to the structural parameter and the state parameter of the target automobile until the error between the first fuel consumption testing parameter and the second fuel consumption testing parameter is smaller than or equal to the error threshold.
It should be noted that the error threshold can be set in advance according to requirements, for example, the error threshold can be considered to be 3%, 5%, and so on.
In some embodiments, the operation of the terminal to obtain the first shift schedule of the engine of the target vehicle includes: acquiring a pedal corresponding relation and a basic gear shifting strategy of a target automobile, wherein the pedal corresponding relation comprises a corresponding relation of an accelerator opening, an engine rotating speed and an engine torque of the target automobile, and the basic gear shifting strategy comprises a corresponding relation of a speed, the accelerator opening and the engine rotating speed of the target automobile; determining a torque corresponding relation of a target automobile according to the pedal corresponding relation and a basic gear shifting strategy, wherein the torque corresponding relation comprises the corresponding relation of the speed, the accelerator opening and the engine torque of the target automobile; and determining a first gear shifting strategy according to the torque corresponding relation.
It should be noted that the basic shift strategy is a shift measurement designed in advance for the engine of the target vehicle, and the pedal correspondence relationship can be a correspondence relationship set in advance, can also be determined after the engine is simulated by a one-dimensional power-economy simulation model for the terminal, and can also be obtained after the target vehicle is tested for test conditions for the terminal.
The pedal corresponding relation comprises the corresponding relation of the accelerator opening degree, the engine rotating speed and the engine torque of the target automobile, and the basic gear shifting strategy comprises the corresponding relation of the speed, the accelerator opening degree and the engine rotating speed of the target automobile, so that the terminal can determine the corresponding relation among the speed, the engine torque and the accelerator opening degree of the target automobile according to the accelerator opening degree and the engine rotating speed.
In some embodiments, since the torque correspondence includes a correspondence of a vehicle speed, an accelerator opening and an engine torque of the target vehicle, the terminal determines corresponding engine power demands at different engine torques and engine speeds according to the torque correspondence by using a first formula, so as to determine corresponding engine power demands at different vehicle speeds and accelerator positions, i.e. a first gear shifting strategy.
P＝T*n/9550 (1)
In the first formula (1), P is the engine power demand, n is the engine speed, and T is the engine torque.
Step 202: and the terminal determines a second gear shifting strategy of the engine according to the optimal economic curve.
It should be noted that the second shift strategy includes a correspondence between the engine power demand and the engine speed.
As can be seen from the above, the optimum economy curve includes the correspondence relationship between the engine speed and the engine torque, and therefore, the terminal can determine the correspondence relationship between the engine speed and the engine required power from the correspondence relationship between the engine speed and the engine torque in the optimum economy curve by the above-described first formula.
In one implementation, the terminal can determine the correspondence between the engine speed and the engine power demand as shown in table 1 below, based on the optimal economy curve.
TABLE 1
| Power demand of engine (kw) | 10 | 20 | … | 110 | 120 |
| Engine speed (rpm) | N1 | N2 | … | N11 | N12 |
Step 203: and the terminal carries out interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain the gear shifting strategy after the target automobile is optimized.
In order to improve the accuracy of the optimized gear shifting strategy, the terminal can perform interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain the optimized gear shifting strategy of the target automobile.
In some embodiments, the operation of the terminal performing interpolation processing on the second shift strategy through the first shift strategy to obtain the optimized shift strategy of the target vehicle at least includes: performing interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain a reference gear shifting strategy; carrying out simulation test on the reference gear shifting strategy in a one-dimensional power economy simulation model of the target automobile to obtain a simulation result; and when the simulation result meets the test requirement, determining the reference gear shifting strategy as the optimized gear shifting strategy.
In some embodiments, the terminal can directly determine the reference shift schedule as the target vehicle optimized shift schedule. However, in order to avoid that the optimized shift strategy has other influences on the target vehicle, the terminal can verify the reference shift strategy. Namely, the terminal can perform simulation test on the reference gear shifting strategy in a one-dimensional power economy simulation model of the target automobile to obtain a simulation result; and when the simulation result meets the test requirement, determining the reference gear shifting strategy as the optimized gear shifting strategy. And when the simulation result does not meet the test requirement, the operation of the step 201 is executed again.
It should be noted that the test requirements can be set in advance according to the requirements.
Step 204: and the terminal prompts the optimized gear shifting strategy through prompt information.
The prompt message can be in at least one form of voice, text, video, and the like.
In the embodiment of the application, the terminal can optimize the gear shifting strategy of the target automobile through the optimal economic curve and the first gear shifting strategy of the engine of the target automobile, so that the operation condition of the engine is close to the optimal economic curve, the oil consumption is reduced, the project development cost is not increased, and the dynamic property of the target automobile can be kept unchanged.
Fig. 3 is a schematic structural diagram of a shift strategy optimization device for a vehicle according to an embodiment of the present disclosure, where the shift strategy optimization device for a vehicle may be implemented by software, hardware, or a combination of the software and the hardware. The shift strategy optimizing apparatus for a vehicle may include: a first acquisition module 301, a determination module 302 and an interpolation module 303.
The first obtaining module 301 is configured to obtain an optimal economic curve of an engine of a target vehicle and a first gear shifting strategy, where the first gear shifting strategy includes engine power requirements corresponding to the target vehicle at different vehicle speeds, the optimal economic curve includes a corresponding relationship between an engine speed and an engine torque, and the target vehicle is a prototype vehicle in a development state;
a determination module 302 for determining a second shift strategy for the engine based on the optimal economy curve, the second shift strategy comprising a correspondence between the engine power demand and the engine speed;
and the interpolation module 303 is configured to perform interpolation processing on the second shift strategy through the first shift strategy to obtain the optimized shift strategy of the target vehicle.
In some embodiments, referring to fig. 4, the apparatus further comprises:
a second obtaining module 304, configured to obtain structural parameters and state parameters of the target vehicle;
a building module 305, configured to build a one-dimensional power-economy simulation model of the target vehicle according to the structural parameters and the state parameters of the target vehicle;
the test module 306 is used for respectively carrying out oil consumption tests on the target automobile and the one-dimensional power economy simulation model to obtain a first oil consumption test parameter and a second oil consumption test parameter;
the triggering module 307 is configured to trigger the first obtaining module 301 to obtain the optimal economic curve and the first gear shifting strategy of the engine of the target vehicle when an error between the first fuel consumption testing parameter and the second fuel consumption testing parameter is smaller than or equal to an error threshold.
In some embodiments, referring to fig. 5, the interpolation module 303 includes:
the interpolation submodule 3031 is configured to perform interpolation processing on the second shift strategy through the first shift strategy to obtain a reference shift strategy;
the test submodule 3032 is used for carrying out simulation test on the reference gear shifting strategy in a one-dimensional power economy simulation model of the target automobile to obtain a simulation result;
the first determining submodule 3033 is configured to determine the reference shift strategy as the optimized shift strategy when the simulation result meets the test requirement.
In some embodiments, referring to fig. 6, the first obtaining module 301 comprises:
the first obtaining submodule 3011 is configured to obtain an engine speed, an accelerator opening, and an engine torque of an engine of the target vehicle under a test working condition;
the second determining submodule 3012 is configured to determine, according to the engine speed, the accelerator opening, and the engine torque of the engine under the test condition, an engine isopower line corresponding to the engine speed in a universal characteristic data map of the engine, where an abscissa of the universal characteristic data map is the engine speed, and an ordinate of the universal characteristic data map is the engine torque;
the searching submodule 3013 is configured to search, according to the fuel consumption rate corresponding to the engine rotation speed, an engine power corresponding to the lowest fuel consumption rate on the engine equipower line;
and a third determining submodule 3014 for determining a curve of the engine power corresponding to the lowest point of the engine speed and the fuel consumption rate as the optimal economic curve.
In some embodiments, referring to fig. 7, the first obtaining module 301 comprises:
the second obtaining submodule 3015 is configured to obtain a pedal correspondence relationship and a basic shift strategy of the target vehicle, where the pedal correspondence relationship includes a correspondence relationship between an accelerator opening, an engine speed, and an engine torque of the target vehicle, and the basic shift strategy includes a correspondence relationship between a vehicle speed, an accelerator opening, and an engine speed of the target vehicle;
a fourth determining submodule 3016, configured to determine a torque correspondence of the target vehicle according to the pedal correspondence and the basic shift strategy, where the torque correspondence includes a correspondence between a vehicle speed, an accelerator opening, and an engine torque of the target vehicle;
a fifth determining submodule 3017 is configured to determine the first shift strategy according to the torque correspondence.
In the embodiment of the application, the terminal can optimize the gear shifting strategy of the target automobile through the optimal economic curve and the first gear shifting strategy of the engine of the target automobile, so that the operation condition of the engine is close to the optimal economic curve, the oil consumption is reduced, the project development cost is not increased, and the dynamic property of the target automobile can be kept unchanged.
It should be noted that: in the shift strategy optimization device for an automobile provided in the above embodiment, when the shift strategy of the automobile is optimized, only the division of the above function modules is exemplified, and in practical application, the function distribution can be completed by different function modules according to needs, that is, the internal structure of the device is divided into different function modules, so as to complete all or part of the above described functions. In addition, the gear shift strategy optimization device for the vehicle provided by the embodiment and the gear shift strategy optimization method embodiment for the vehicle belong to the same concept, and specific implementation processes thereof are detailed in the method embodiment and are not described herein again.
Fig. 8 shows a block diagram of a terminal 800 according to an exemplary embodiment of the present application. The terminal 800 may be: a smartphone, a tablet, a laptop, or a desktop computer. The terminal 800 may also be referred to by other names such as user equipment, portable terminal, laptop terminal, desktop terminal, etc.
In general, the terminal 800 includes: a processor 801 and a memory 802.
The processor 801 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so forth. The processor 801 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 801 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a 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 required to be displayed by the display screen. In some embodiments, the processor 801 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.
In some embodiments, the terminal 800 may further include: a peripheral interface 803 and at least one peripheral. The processor 801, memory 802 and peripheral interface 803 may be connected by bus or signal lines. Various peripheral devices may be connected to peripheral interface 803 by a bus, signal line, or 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.
The peripheral interface 803 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 801 and the memory 802. In some embodiments, the processor 801, memory 802, and peripheral 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 interface 803 may be implemented on separate chips or circuit boards, which are not limited by this embodiment.
The Radio Frequency circuit 804 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 804 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 804 converts an electrical signal into an electromagnetic signal to be transmitted, or converts a received electromagnetic signal into an electrical signal. 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 subscriber identity module card, and so forth. The radio frequency circuit 804 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the radio frequency circuit 804 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.
The display screen 805 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display 805 is a touch display, the display 805 also has the ability to capture touch signals on or above the surface of the display 805. The touch signal may be input to the processor 801 as a control signal for processing. At this point, the display 805 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display 805 may be one, providing the front panel of the terminal 800; in other embodiments, the display 805 may be at least two, respectively disposed on different surfaces of the terminal 800 or in a folded design; in other embodiments, the display 805 may be a flexible display disposed on a curved surface or a folded surface of the terminal 800. Even further, the display 805 may be arranged in a non-rectangular irregular pattern, i.e., a shaped screen. The Display 805 can be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and other materials.
The camera assembly 806 is used to capture images or video. Optionally, camera assembly 806 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each rear camera is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (Virtual Reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 806 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.
The audio circuit 807 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 801 for processing or inputting the electric signals to the radio frequency circuit 804 to realize voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the terminal 800. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 801 or the radio frequency circuit 804 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, the audio circuitry 807 may also include a headphone jack.
The positioning component 808 is used to locate the current geographic position of the terminal 800 for navigation or LBS (Location Based Service). The Positioning component 808 may be a Positioning component based on the GPS (Global Positioning System) in the united states, the beidou System in china, the graves System in russia, or the galileo System in the european union.
In some embodiments, terminal 800 also includes one or more sensors 810. The one or more sensors 810 include, but are not limited to: acceleration sensor 811, gyro sensor 812, pressure sensor 813, fingerprint sensor 814, optical sensor 815 and proximity sensor 816.
The acceleration sensor 811 may detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the terminal 800. For example, the acceleration sensor 811 may be used to detect the components of the gravitational acceleration in three coordinate axes. The processor 801 may control the display 805 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 811. The acceleration sensor 811 may also be used for acquisition of motion data of a game or a user.
The gyro sensor 812 may detect a body direction and a rotation angle of the terminal 800, and the gyro sensor 812 may cooperate with the acceleration sensor 811 to acquire a 3D motion of the user with respect to the terminal 800. From the data collected by the gyro sensor 812, the processor 801 may implement the following functions: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.
Pressure sensors 813 may be disposed on the side frames of terminal 800 and/or underneath display 805. When the pressure sensor 813 is disposed on the side frame of the terminal 800, the holding signal of the user to the terminal 800 can be detected, and the processor 801 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 813. When the pressure sensor 813 is disposed at a lower layer of the display screen 805, the processor 801 controls the operability control on the UI interface according to the pressure operation of the user on the display screen 805. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.
The fingerprint sensor 814 is used for collecting a fingerprint of the user, and the processor 801 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 814, or the fingerprint sensor 814 identifies the identity of the user according to the collected fingerprint. Upon identifying that the user's identity is a trusted identity, the processor 801 authorizes the user to perform relevant sensitive operations including unlocking a screen, viewing encrypted information, downloading software, paying for and changing settings, etc. Fingerprint sensor 814 may be disposed on the front, back, or side of terminal 800. When a physical button or a vendor Logo is provided on the terminal 800, the fingerprint sensor 814 may be integrated with the physical button or the vendor Logo.
The optical sensor 815 is used to collect the ambient light intensity. In one embodiment, processor 801 may control the display brightness of display 805 based on the ambient light intensity collected by 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 805 is reduced. In another embodiment, the processor 801 may also dynamically adjust the shooting parameters of the camera assembly 806 based on the ambient light intensity collected by the optical sensor 815.
A proximity sensor 816, also known as a distance sensor, is typically provided on the front panel of the terminal 800. The proximity sensor 816 is used to collect the distance between the user and the front surface of the terminal 800. In one embodiment, when the proximity sensor 816 detects that the distance between the user and the front surface of the terminal 800 gradually decreases, the processor 801 controls the display 805 to switch from the bright screen state to the dark screen state; when the proximity sensor 816 detects that the distance between the user and the front surface of the terminal 800 becomes gradually larger, the display 805 is controlled by the processor 801 to switch from the breath-screen state to the bright-screen state.
Those skilled in the art will appreciate that the configuration shown in fig. 8 is not intended to be limiting of terminal 800 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.
The embodiment of the application also provides a non-transitory computer readable storage medium, and when instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to execute the method for optimizing the gear shifting strategy of the automobile provided by the embodiment.
The embodiment of the present application further provides a computer program product containing instructions, which when run on a terminal, causes the terminal to execute the method for optimizing a gear shifting strategy of an automobile provided in the foregoing embodiment.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A method for optimizing a gear shift strategy for a vehicle, the method comprising:
the method comprises the steps that an optimal economic curve and a first gear shifting strategy of an engine of a target automobile are obtained, wherein the first gear shifting strategy comprises corresponding engine power requirements of the target automobile under throttle valves with different speeds, the optimal economic curve comprises a corresponding relation between engine rotating speed and engine torque, and the target automobile is a sample automobile in a development state;
determining a second gear shifting strategy of the engine according to the optimal economic curve, wherein the second gear shifting strategy comprises a corresponding relation between the required power of the engine and the rotating speed of the engine;
and carrying out interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain the optimized gear shifting strategy of the target automobile.
2. The method of claim 1, wherein prior to obtaining the optimal economy curve and the first shift schedule for the engine of the target vehicle, further comprising:
acquiring structural parameters and state parameters of the target automobile;
according to the structural parameters and the state parameters of the target automobile, a one-dimensional dynamic economy simulation model of the target automobile is constructed;
respectively carrying out oil consumption testing on the target automobile and the one-dimensional power economy simulation model to obtain a first oil consumption testing parameter and a second oil consumption testing parameter;
and when the error between the first oil consumption testing parameter and the second oil consumption testing parameter is smaller than or equal to an error threshold value, executing the operation of obtaining the optimal economic curve of the engine of the target automobile and the first gear shifting strategy.
3. The method of claim 1, wherein interpolating the second shift schedule via the first shift schedule to obtain the target vehicle optimized shift schedule comprises:
interpolating the second gear shifting strategy through the first gear shifting strategy to obtain a reference gear shifting strategy;
carrying out simulation test on the reference gear shifting strategy in a one-dimensional power economy simulation model of the target automobile to obtain a simulation result;
and when the simulation result meets the test requirement, determining the reference gear shifting strategy as the optimized gear shifting strategy.
4. The method of claim 1, wherein said obtaining an optimal economic curve for an engine of a target vehicle comprises:
acquiring the engine speed, the accelerator opening and the engine torque of the engine of the target automobile under the test working condition;
according to the engine speed, the accelerator opening and the engine torque of the engine under the test working condition, determining an engine equal power line corresponding to the engine speed in a universal characteristic data graph of the engine, wherein the abscissa of the universal characteristic data graph is the engine speed, and the ordinate of the universal characteristic data graph is the engine torque;
according to the fuel consumption rate corresponding to the engine rotating speed, searching the engine power corresponding to the lowest fuel consumption rate on the equal power line of the engine;
and determining a curve consisting of the engine power corresponding to the lowest point of the engine speed and the fuel consumption rate as the optimal economic curve.
5. The method of claim 1, wherein said obtaining a first shift schedule for an engine of a target vehicle comprises:
acquiring a pedal corresponding relation and a basic gear shifting strategy of the target automobile, wherein the pedal corresponding relation comprises a corresponding relation of an accelerator opening, an engine rotating speed and an engine torque of the target automobile, and the basic gear shifting strategy comprises a corresponding relation of a speed, the accelerator opening and the engine rotating speed of the target automobile;
determining a torque corresponding relation of the target automobile according to the pedal corresponding relation and the basic gear shifting strategy, wherein the torque corresponding relation comprises the corresponding relation of the speed, the accelerator opening and the engine torque of the target automobile;
and determining the first gear shifting strategy according to the torque corresponding relation.
6. A gear shift strategy optimization device for a vehicle, said device comprising:
the system comprises a first obtaining module, a second obtaining module and a third obtaining module, wherein the first obtaining module is used for obtaining an optimal economic curve and a first gear shifting strategy of an engine of a target automobile, the first gear shifting strategy comprises corresponding engine power requirements of the target automobile under different speed throttle, the optimal economic curve comprises a corresponding relation between an engine rotating speed and an engine torque, and the target automobile is a sample automobile in a development state;
a determination module for determining a second shift strategy for the engine based on the optimal economy curve, the second shift strategy comprising a correspondence between the engine power demand and the engine speed;
and the interpolation module is used for carrying out interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain the optimized gear shifting strategy of the target automobile.
7. The apparatus of claim 6, wherein the apparatus further comprises:
the second acquisition module is used for acquiring the structural parameters and the state parameters of the target automobile;
the construction module is used for constructing a one-dimensional dynamic economy simulation model of the target automobile according to the structural parameters and the state parameters of the target automobile;
the test module is used for respectively carrying out oil consumption test on the target automobile and the one-dimensional power economy simulation model to obtain a first oil consumption test parameter and a second oil consumption test parameter;
the triggering module is used for triggering the first obtaining module to obtain the optimal economic curve and the first gear shifting strategy of the engine of the target automobile when the error between the first oil consumption testing parameter and the second oil consumption testing parameter is smaller than or equal to an error threshold value.
8. The apparatus of claim 6, wherein the interpolation module comprises:
the interpolation sub-module is used for carrying out interpolation processing on the second gear shifting strategy through the first gear shifting strategy to obtain a reference gear shifting strategy;
the test sub-module is used for carrying out simulation test on the reference gear shifting strategy in a one-dimensional power economy simulation model of the target automobile to obtain a simulation result;
and the first determining submodule is used for determining the reference gear shifting strategy as the optimized gear shifting strategy when the simulation result meets the test requirement.
9. The apparatus of claim 6, wherein the first obtaining module comprises:
the first obtaining submodule is used for obtaining the engine speed, the accelerator opening and the engine torque of the engine of the target automobile under the test working condition;
the second determining submodule is used for determining an engine equal-power line corresponding to the engine speed in a universal characteristic data graph of the engine according to the engine speed, the accelerator opening and the engine torque of the engine under the test working condition, the abscissa of the universal characteristic data graph is the engine speed, and the ordinate of the universal characteristic data graph is the engine torque;
the searching submodule is used for searching the engine power corresponding to the lowest fuel consumption rate on the equal power line of the engine according to the fuel consumption rate corresponding to the rotating speed of the engine;
and the third determining submodule is used for determining a curve formed by the engine power corresponding to the lowest point of the engine speed and the fuel consumption rate as the optimal economic curve.
10. A computer-readable storage medium having stored thereon instructions which, when executed by a processor, carry out the steps of the method of any of the preceding claims 1 to 5.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114542706A (en) * | 2022-03-31 | 2022-05-27 | 潍柴动力股份有限公司 | Vehicle gear optimization method and device based on multi-vehicle cooperation and vehicle |
| CN114623230A (en) * | 2022-03-21 | 2022-06-14 | 潍柴动力股份有限公司 | Vehicle gear adjusting method, device and system and storage medium |
| CN115685735A (en) * | 2022-10-31 | 2023-02-03 | 东风商用车有限公司 | Engine working condition whole vehicle economy simulation method, device, equipment and storage medium |
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2021
- 2021-11-25 CN CN202111415798.2A patent/CN114117789A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623230A (en) * | 2022-03-21 | 2022-06-14 | 潍柴动力股份有限公司 | Vehicle gear adjusting method, device and system and storage medium |
| CN114623230B (en) * | 2022-03-21 | 2024-02-20 | 潍柴动力股份有限公司 | Vehicle gear adjusting method, device and system and storage medium |
| CN114542706A (en) * | 2022-03-31 | 2022-05-27 | 潍柴动力股份有限公司 | Vehicle gear optimization method and device based on multi-vehicle cooperation and vehicle |
| CN114542706B (en) * | 2022-03-31 | 2024-01-16 | 潍柴动力股份有限公司 | Vehicle gear optimization method and device based on multi-vehicle cooperation and vehicle |
| CN115685735A (en) * | 2022-10-31 | 2023-02-03 | 东风商用车有限公司 | Engine working condition whole vehicle economy simulation method, device, equipment and storage medium |
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