Gear shifting reminding method and device, vehicle and storage medium

Abstract

The invention relates to the technical field of vehicles, in particular to a gear shifting reminding method and device, a vehicle and a storage medium. If the current operation working condition is the preset working condition meeting the stable operation condition, current operation parameters of an engine of the vehicle are obtained, and the optimal gear of the vehicle meeting the economical oil consumption area is determined according to the current operation parameters; and when the optimal gear is inconsistent with the current gear, gear shifting reminding is carried out. Therefore, the problems that according to a vehicle gear shifting method in the related technology, vehicle working condition characteristics are not distinguished, and the optimality of vehicle fuel economy cannot be guaranteed are solved; and gear shifting reminding is carried out based on all working conditions, reminding is frequent, information is much, and the driving experience of a driver is affected.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a gear shift reminder method, device, vehicle and storage medium. Background Art

[0002] With the development of road traffic, driving environments and driving scenarios have become increasingly complex, requiring drivers to perform adaptive gear shifting operations in different driving scenarios.

[0003] In the related art, the gear shifting operation of a vehicle matched with a manual transmission is completed by the driver, and the timing of the vehicle's gear shifting is determined by personal experience; therefore, a method of completing the gear shifting through logical judgment based on information such as vehicle speed, rotation speed, torque, etc. can be used to ensure smooth gear shifting.

[0004] However, the methods in the related art do not distinguish the vehicle operating conditions and cannot guarantee the optimal fuel economy of the vehicle. In addition, the related art performs gear shift reminders based on all operating conditions, and the prompts are frequent and contain a lot of information, which affects the driver's driving experience. Summary of the invention

[0005] The present application provides a gear shift reminder method, device, vehicle and storage medium to solve the problems that the vehicle gear shift method in the related art does not distinguish the vehicle operating condition characteristics and cannot ensure the optimality of the vehicle fuel economy; and the gear shift reminder is based on all operating conditions, the prompts are frequent and the information is large, which affects the driver's driving experience.

[0006] The first aspect of the present application provides a gear shift reminder method, comprising the following steps: identifying a current operating condition of a vehicle; if the current operating condition is a preset condition that meets stable operating conditions, obtaining current operating parameters of the vehicle's engine, and determining an optimal gear position for the vehicle to meet an economical fuel consumption area based on the current operating parameters; and performing a gear shift reminder when the optimal gear position is inconsistent with the current gear position.

[0007] Optionally, determining the optimal gear position for the vehicle to satisfy the economic fuel consumption area based on the current operating parameters includes: obtaining the universal characteristic diagram of the engine and the economic fuel consumption area of ​​the universal characteristic diagram; identifying that the current fuel consumption is in the current area of ​​the universal characteristic diagram based on the current operating parameters; if the current area is in the economic fuel consumption area, taking the gear position corresponding to the current area as the optimal gear position, and if the current area is not in the economic fuel consumption area, obtaining the adjacent economic fuel consumption area of ​​the current area, and taking the gear position corresponding to the adjacent economic fuel consumption area as the optimal gear position, otherwise no gear shift reminder is performed.

[0008] Optionally, obtaining the universal characteristic diagram of the engine and the economic fuel consumption area of ​​the universal characteristic diagram includes: obtaining a first curve of the minimum fuel consumption rate under engine torque, a second curve of the minimum fuel consumption rate under engine power, and a third curve of the minimum fuel consumption rate under engine speed; generating the universal characteristic diagram according to the first curve, the second curve and the third curve, and determining one or more of the economic fuel consumption areas according to the intersection area of ​​the first curve, the second curve and the third curve.

[0009] Optionally, the current operating parameters include current torque, current power and current speed, and identifying that the current fuel consumption is in the current area of ​​the universal characteristic diagram based on the current operating parameters includes: determining the current area corresponding to the current fuel consumption in the universal characteristic diagram based on the current torque, the current power and the current speed.

[0010] Optionally, obtaining the adjacent economic fuel consumption area of ​​the current area includes: generating a current gear, speed and torque distribution map based on the engine speed and the engine torque; superimposing the current gear, speed and torque distribution map on the universal characteristic map to obtain an adjacent gear, speed and torque distribution map, and identifying the economic fuel consumption area along the engine speed direction from the adjacent gear, speed and torque distribution map; and taking the economic fuel consumption area closest to the intersection area as the adjacent economic fuel consumption area of ​​the current area.

[0011] Optionally, superimposing the current gear, speed and torque distribution diagram onto the universal characteristic diagram to obtain an adjacent gear, speed and torque distribution diagram includes: calculating the predicted speed of the adjacent gear based on the current speed of the engine; if the adjacent gear is greater than the current gear, then on the equal power line of the universal characteristic diagram, with the predicted speed as the starting point, moving the current gear, speed and torque distribution diagram in the direction of decreasing speed; if the adjacent gear is less than the current gear, then on the equal power line of the universal characteristic diagram, with the predicted speed as the starting point, moving the current gear, speed and torque distribution diagram in the direction of increasing speed; after the movement is completed, fixing the current gear, speed and torque distribution diagram on the universal characteristic diagram to obtain the adjacent gear, speed and torque distribution diagram.

[0012] Optionally, the identifying of the current operating condition of the vehicle includes: obtaining a current geographic scene and operating data of the vehicle; determining the current operating condition of the vehicle based on the current geographic scene and the operating data, wherein a geographic scene reminder is performed if it is determined based on the current geographic scene that the geographic scene in which the vehicle is located has changed.

[0013] The second aspect of the present application provides a gear shift reminder device, including: an identification module, used to identify the current operating condition of the vehicle; a determination module, used to obtain the current operating parameters of the engine of the vehicle if the current operating condition is a preset condition that meets the stable operating conditions, and determine the optimal gear position of the vehicle that meets the economic fuel consumption area based on the current operating parameters; a reminder module, used to provide a gear shift reminder when the optimal gear position is inconsistent with the current gear position.

[0014] Optionally, the determination module is further used to: obtain the universal characteristic diagram of the engine and the economic fuel consumption area of ​​the universal characteristic diagram; identify that the current fuel consumption is in the current area of ​​the universal characteristic diagram according to the current operating parameters; if the current area is in the economic fuel consumption area, then the gear corresponding to the current area is used as the optimal gear; if the current area is not in the economic fuel consumption area, then obtain the adjacent economic fuel consumption area of ​​the current area, and use the gear corresponding to the adjacent economic fuel consumption area as the optimal gear, otherwise no gear shift reminder is given.

[0015] Optionally, the determination module is further used to: obtain a first curve of the minimum fuel consumption rate under engine torque, a second curve of the minimum fuel consumption rate under engine power, and a third curve of the minimum fuel consumption rate under engine speed; generate the universal characteristic diagram according to the first curve, the second curve and the third curve, and determine one or more of the economic fuel consumption areas according to the intersection area of ​​the first curve, the second curve and the third curve.

[0016] Optionally, the current operating parameters include current torque, current power and current speed, and the determination module is further used to determine a current area corresponding to the current fuel consumption in the universal characteristic diagram according to the current torque, the current power and the current speed.

[0017] Optionally, the determination module is further used to: generate a current gear, speed and torque distribution map based on the engine speed and the engine torque; superimpose the current gear, speed and torque distribution map onto the universal characteristic map to obtain an adjacent gear, speed and torque distribution map, and identify an economic fuel consumption area along the engine speed direction from the adjacent gear, speed and torque distribution map; and use the economic fuel consumption area closest to the intersection area as the adjacent economic fuel consumption area of ​​the current area.

[0018] Optionally, the determination module is further used to: calculate the predicted speed of the adjacent gear based on the current speed of the engine; if the adjacent gear is greater than the current gear, then on the equal power line of the universal characteristic diagram, with the predicted speed as the starting point, move the current gear, speed and torque distribution diagram in the direction of decreasing speed; if the adjacent gear is less than the current gear, then on the equal power line of the universal characteristic diagram, with the predicted speed as the starting point, move the current gear, speed and torque distribution diagram in the direction of increasing speed; after the movement is completed, fix the current gear, speed and torque distribution diagram on the universal characteristic diagram to obtain the adjacent gear, speed and torque distribution diagram.

[0019] Optionally, the identification module is further used to: obtain the current geographic scene and operating data of the vehicle; determine the current operating condition of the vehicle based on the current geographic scene and the operating data, wherein a geographic scene reminder is performed if it is determined based on the current geographic scene that the geographic scene in which the vehicle is located has changed.

[0020] A third aspect of the present application provides a vehicle, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the gear shift reminder method as described in the above embodiment.

[0021] The fourth aspect of the present application provides a computer-readable storage medium on which a computer program is stored. The program is executed by a processor to implement the gear shift reminder method as described in the above embodiment.

[0022] Therefore, this application has at least the following beneficial effects:

[0023] The embodiment of the present application can identify the current operating condition of the vehicle to match the optimal gear position that satisfies the economic fuel consumption zone, and provide a gear shift reminder when the current gear position is inconsistent with the optimal gear position; thereby, the driver can be reminded to optimize the gear shift operation under steady-state conditions, improve the vehicle's economy, avoid excessive sending of reminder information to interfere with driving, and enhance the driver's driving experience.

[0024] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 A flowchart of a gear shift reminder method according to an embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the process of identifying a hill climbing condition according to an embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of the downhill working condition identification process of an embodiment of the present application;

[0029] Figure 4 This is a schematic diagram of the rapid acceleration overtaking condition recognition process of an embodiment of the present application;

[0030] Figure 5 A schematic diagram of a braking condition identification process according to an embodiment of the present application;

[0031] Figure 6 A schematic diagram of a universal characteristic curve of an embodiment of the present application;

[0032] Figure 7 A schematic diagram of the speed torque distribution of an embodiment of the present application;

[0033] Figure 8 This is a schematic diagram of the prediction of the approaching gear position according to an embodiment of the present application;

[0034] Fig. 9 This is a schematic diagram of the reminder process of the gear shift reminder function in an embodiment of the present application;

[0035] Fig.10 This is an example diagram of a gear shift reminder device according to an embodiment of the present application;

[0036] Fig.11 A schematic diagram of the structure of a vehicle according to an embodiment of the present application. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0038] With the development of road traffic, the driving environment has become increasingly complex. Driving in different geographical environments, different terrain environments, different climatic environments and different logistics modes creates very complex scenarios. Therefore, drivers are required to perform adaptive gear shifting operations in different driving scenarios.

[0039] In the related art, vehicles equipped with manual transmissions do not have a gear shift reminder function, and the gear shift operation is completed by the driver. The gear shift is generally completed through logical judgment based on information such as vehicle speed, rotation speed, torque, etc., and there is also a way to judge by identifying fuel economy.

[0040] However, the driving skills of drivers vary greatly, and the timing of shifting gears is entirely determined by personal experience. Most drivers can operate a manual transmission skillfully, but a considerable number of drivers do not understand the concept of the engine's economical fuel consumption zone, and do not know how to operate the transmission and grasp the timing of shifting gears based on road conditions, vehicle speed, rotation speed and driving needs, resulting in high vehicle fuel consumption; at the same time, the shifting method in the relevant technology is not differentiated based on the vehicle's operating conditions, and cannot guarantee the optimal fuel economy of the vehicle; and the relevant technology performs shifting reminders based on all operating conditions, with frequent prompts and a lot of information, which affects the driver's driving experience.

[0041] In response to the problems mentioned in the above background technology, the present application provides a gear shift reminder method, device, vehicle and storage medium. The gear shift reminder method, device, vehicle and storage medium of the embodiments of the present application are described below with reference to the accompanying drawings.

[0042] Specifically, Figure 1 A flowchart of a gear shift reminder method provided in an embodiment of the present application.

[0043] like Figure 1 As shown, the gear shift reminder method includes the following steps:

[0044] In step S101 , the current operating condition of the vehicle is identified.

[0045] It can be understood that the embodiment of the present application can identify the current operating condition of the vehicle so that in subsequent embodiments, the vehicle's economic fuel consumption zone can be confirmed based on the vehicle's operating condition; among them, the embodiment of the present application can use at least one method to realize the identification of the current operating condition, and there is no specific limitation on this.

[0046] As a possible implementation method, identifying the current operating condition of the vehicle includes: obtaining the current geographic scene and operating data of the vehicle; determining the current operating condition of the vehicle based on the current geographic scene and operating data, wherein a geographic scene reminder is issued when the geographic scene in which the vehicle is located is determined to have changed based on the current geographic scene.

[0047] It can be understood that the embodiments of the present application can determine the current operating condition of the vehicle by identifying the current geographic scene and operating data of the vehicle, and prompt the current operating area, operating road type and current driving altitude of the vehicle on the display screen during the driving of the vehicle; wherein, through the collection of geographic scene data and the identification of geographic scenes, the reminder information only appears once when entering a new scene, that is, the embodiments of the present application can remind once when the geographic scene in which the vehicle is located changes, which not only reminds the scene change, but also avoids excessive reminders that may cause the driver to be disgusted.

[0048] Specifically, 1. Geographic scene acquisition:

[0049] The vehicle of the embodiment of the present application has a self-learning function, which can continuously accumulate geographical scene information, establish and continuously update the geographical scene database; when performing geographical scene recognition, the longitude, latitude and altitude signals can be used to compare the geographical scene library map to identify the current geographical location (province, city, county); wherein, the signals that need to be collected for geographical scene recognition in the embodiment of the present application can be shown in the following Table 1:

[0050] Table 1

[0051]

[0052] It should be noted that the vehicle speed, rotation speed and load can be used as judgment signs to determine whether the vehicle is running; the embodiment of the present application does not perform geographic scene recognition on non-moving vehicles.

[0053] Specifically, when the vehicle speed is > x km / h, x>0, it can be judged that the vehicle is in motion; when the vehicle speed is<x km / h,x> 0, it can be known that the speed is equal to the idle speed at this time, and it is determined that the vehicle is in a stopped state, but the engine is running at idle speed; when the embodiment of the present application does not receive the vehicle speed and speed signals, it is determined that the vehicle is in an off state and the engine is stopped.

[0054] 2. Operation data acquisition:

[0055] The signals that need to be collected for data acquisition in this embodiment of the present application can be shown in Table 2 below:

[0056] Table 2

[0057]

[0058] It is understandable that, after the vehicle operating condition is identified, the embodiment of the present application may not implement the shift reminder operation for transient identification operating conditions such as climbing, descending, rapid acceleration, overtaking, and braking. The specific identification and judgment process may be as follows:

[0059] (1) Climbing condition identification: The embodiment of the present application can make a judgment based on the altitude change rate, vehicle speed change rate, engine speed change rate and engine load change rate, such as Figure 2 As shown:

[0060] When the vehicle speed is not V≤V up When , it is judged as non-climbing condition;

[0061] When the vehicle speed V>V up When the altitude change rate Δh>h up / 10s, confirm that the current working condition is climbing condition;

[0062] When the vehicle speed V>V up , altitude change rate Δh≤h up / 10s, continue to judge the current vehicle speed change rate |ΔV| <V 2 , Engine speed change rate ΔS up , Engine load change rate ΔLoad>L up If the above conditions are met, the vehicle can be considered to be in a climbing condition; if the above conditions are not met, the vehicle can be considered to be in a non-climbing condition.

[0063] (2) Downhill condition identification: The embodiment of the present application can determine whether the vehicle is in a downhill condition based on the altitude change rate, accelerator pedal travel and engine load change rate, such as Figure 3 As shown:

[0064] When the vehicle speed V≤V down When , it is judged as non-downhill condition;

[0065] When the vehicle speed V>V down When the altitude change rate Δh<-h down / 10s, confirm that the current working condition is downhill;

[0066] When the vehicle speed V>V down , Δh≥-h down / 10s, continue to judge the current accelerator pedal travel S down , Engine load ΔLoad <L down If the above conditions are met, the vehicle can be considered to be in a downhill climbing condition; if the above conditions are not met, the vehicle can be considered to be in a non-downhill condition.

[0067] (3) Rapid acceleration and overtaking condition recognition: The embodiment of the present application can make a judgment based on the vehicle speed change rate, accelerator pedal travel and altitude change rate, such as Figure 4 As shown:

[0068] When the vehicle speed change rate ΔV≤V acc When the vehicle is in a non-urgent acceleration overtaking condition, it is judged as a non-urgent acceleration overtaking condition;

[0069] When the vehicle speed change rate ΔV>V down When the accelerator pedal travel S acc When the vehicle is in a non-urgent acceleration overtaking condition, it is judged as a non-urgent acceleration overtaking condition;

[0070] When V>V down , S≥S acc When the current altitude change rate |Δh| <h acc / 10s, if the above conditions are met, the vehicle can be considered to be in a rapid acceleration overtaking condition; if the above conditions are not met, the vehicle can be considered to be in a non-rapid acceleration overtaking condition.

[0071] ​​​(4) Braking condition identification: The embodiment of the present application can make a judgment based on the vehicle speed change rate and the brake pedal travel, such as Figure 5 As shown:

[0072] When the vehicle speed change rate ΔV ≥ -V break When the brake is on, it is judged as a non-braking condition;

[0073] When the vehicle speed change rate ΔV<-V break When S≤S break When the brake is on, it is judged as a non-braking condition;

[0074] When ΔV<-V break 、S>S break When , the vehicle can be considered to be in braking condition.

[0075] In step S102, if the current operating condition is a preset condition that satisfies the stable operating condition, the current operating parameters of the vehicle's engine are obtained, and the optimal gear position for the vehicle to meet the economical fuel consumption area is determined based on the current operating parameters.

[0076] Among them, under the condition of meeting stable operating conditions, the preset operating conditions can be set according to actual conditions, and no specific restrictions are made on this.

[0077] It is understandable that the embodiment of the present application can obtain the current operating parameters of the vehicle engine when the current operating condition of the vehicle is a preset condition that meets the stable operating conditions, and determine the optimal gear position of the vehicle that meets the economic fuel consumption area based on the operating parameters; when the current operating condition of the vehicle does not belong to the preset condition that meets the stable operating conditions, the engine operating parameters are not obtained in real time. Among them, the process of calculating the optimal gear position that meets the economic fuel consumption area in the embodiment of the present application can be specifically as follows:

[0078] Specifically, 1. Determine the economic operation area

[0079] In an embodiment of the present application, the optimal gear position for the vehicle to meet the economic fuel consumption area is determined based on the current operating parameters, including: obtaining the universal characteristic diagram of the engine and the economic fuel consumption area of ​​the universal characteristic diagram; identifying that the current fuel consumption is in the current area of ​​the universal characteristic diagram based on the current operating parameters; if the current area is in the economic fuel consumption area, the gear position corresponding to the current area is used as the optimal gear position, and if the current area is not in the economic fuel consumption area, the adjacent economic fuel consumption area of ​​the current area is obtained, and the gear position corresponding to the adjacent economic fuel consumption area is used as the optimal gear position, otherwise no gear shift reminder is performed.

[0080] It can be understood that the embodiment of the present application can obtain the universal characteristic diagram of the engine and its economic fuel consumption zone, compare the current vehicle operating parameters with the universal characteristic diagram, and determine whether the vehicle is currently in the economic fuel consumption zone; when the vehicle is in the economic fuel consumption zone, the current gear is used as the best gear, and when the vehicle is in the non-economic fuel consumption zone, the gear corresponding to the nearby economic fuel consumption zone is matched, otherwise no gear shift reminder is performed; the specific process can be as follows:

[0081] (1) Obtain the universal characteristic diagram of the engine and the economic fuel consumption area of ​​the universal characteristic diagram:

[0082] In an embodiment of the present application, a universal characteristic diagram of an engine and an economic fuel consumption area of ​​the universal characteristic diagram are obtained, including: obtaining a first curve of the minimum fuel consumption rate under engine torque, a second curve of the minimum fuel consumption rate under engine power, and a third curve of the minimum fuel consumption rate under engine speed; generating a universal characteristic diagram according to the first curve, the second curve, and the third curve, and determining one or more economic fuel consumption areas according to the intersection area of ​​the first curve, the second curve, and the third curve.

[0083] It can be understood that the embodiment of the present application can generate a universal characteristic diagram using a first curve of the minimum fuel consumption rate under engine torque, a second curve of the minimum fuel consumption rate under engine power, and a third curve of the minimum fuel consumption rate under engine speed, thereby identifying one or more economic fuel consumption zones based on the intersection area of ​​the above curves on the universal characteristic diagram.

[0084] Among them, the embodiment of the present application can define N e is the engine power (kW), T tq is the engine torque (Nm), n is the engine speed (r / min), g e is the fuel consumption rate (g.kW / h), is the slope of the fuel consumption rate curve, is the slope of the power curve, is the slope of the torque curve.

[0085] It should be noted that when the difference in the slopes of the two curves approaches zero (or minimum), there is an extreme value, and g e Only the minimum value is shown on the universal characteristic curve, so it can be obtained by n = different constants (i.e. T tq = different constants), and The difference tends to zero or is minimized; that is, g e The point where the curve is tangent to each parameter or the point where the angle is the smallest is the minimum fuel consumption point when this parameter is a certain constant. Connecting these points into a curve is the minimum fuel consumption rate curve within the range of this parameter variation.

[0086] Specifically, if Figure 6 As shown, curve A is T tq The minimum fuel consumption rate curve (first curve) under the condition of N e The minimum fuel consumption rate curve under n, curve C is the minimum fuel consumption rate curve under each n; the minimum fuel consumption rate g exists in the intersection area D of the three curves emin .

[0087] (2) Identify the area of ​​the universal characteristic diagram where the current fuel consumption is located based on the current operating parameters:

[0088] In an embodiment of the present application, the current operating parameters include the current torque, the current power and the current speed. Identifying that the current fuel consumption is in the current area of ​​the universal characteristic diagram based on the current operating parameters includes: determining the current area corresponding to the current fuel consumption in the universal characteristic diagram based on the current torque, the current power and the current speed.

[0089] It can be understood that the embodiment of the present application can use the engine universal characteristics as input and define an economic speed identification algorithm based on the universal characteristics of the engine test bench; thereby, the current area corresponding to the current fuel consumption in the universal characteristics diagram can be identified and confirmed based on the current torque, power and speed.

[0090] Specifically, assuming that the vehicle power is balanced in an ideal state, that is, it travels at a constant speed, such as Figure 6 As shown, according to curve B and minimum fuel consumption g emin As the basis for judging the economical operation area, the embodiment of the present application can select the most economical operation area: first, the engine speed torque distribution is mainly distributed near the B curve and is considered to be running in the economical operation area. If the engine speed torque distribution has multiple economical operation areas along the speed n direction, according to g emin That is, the distance of area D is further evaluated, and the closest distance is selected as the most economical operation area; the distance evaluation can adopt the Euclidean distance evaluation method:

[0091] N e =f(n,T tq ) (Formula 1)

[0092] g e =f(n,T tq ) (Formula 2)

[0093]

[0094]

[0095]

[0096]

[0097] Among them, i is the sequence number of the economic operation area corresponding to the planned gear shift; d i is the distance between the ith economic operation area and area D; x i ,y i is the horizontal and vertical coordinates of the i-th economic operation area, that is, the speed n and torque T tq ; g x ,g y is the horizontal and vertical coordinates of area D, namely the speed n and torque T tq .

[0098] (3) Get the nearby economic fuel consumption area of ​​the current area:

[0099] In an embodiment of the present application, the adjacent economic fuel consumption area of ​​the current area is obtained, including: generating a current gear, speed and torque distribution map based on the engine speed and the engine torque; superimposing the current gear, speed and torque distribution map on the universal characteristic map to obtain an adjacent gear, speed and torque distribution map, and identifying the economic fuel consumption area along the engine speed direction from the adjacent gear, speed and torque distribution map; and taking the economic fuel consumption area closest to the intersection area as the adjacent economic fuel consumption area of ​​the current area.

[0100] It is understandable that the embodiments of the present application can be based on the speed and torque, such as Figure 7 As shown, the current gear speed torque distribution is generated and superimposed on the universal characteristics. The ranking of the torque intensity ratio at each speed is used as the basis for judging the strength of the distribution. The higher the ranking, the greater the strength. The top two speed ranges in the bubble distribution area in the figure deviate to the left from the economic fuel consumption area.

[0101] In an embodiment of the present application, the current gear, speed and torque distribution diagram is superimposed on the universal characteristic diagram to obtain the adjacent gear, speed and torque distribution diagram, including: calculating the predicted speed of the adjacent gear according to the current speed of the engine; if the adjacent gear is greater than the current gear, then on the equal power line of the universal characteristic diagram, with the predicted speed as the starting point, the current gear, speed and torque distribution diagram is moved in the direction of decreasing speed; if the adjacent gear is less than the current gear, on the equal power line of the universal characteristic diagram, with the predicted speed as the starting point, the current gear, speed and torque distribution diagram is moved in the direction of increasing speed; after the movement is completed, the current gear, speed and torque distribution diagram is fixed on the universal characteristic diagram to obtain the adjacent gear, speed and torque distribution diagram.

[0102] The engine torque calculation formula of the embodiment of the present application may be:

[0103] T tq =Treference*(Prealratio-Pfrictionratio) / 100(Formula 7)

[0104] Among them, T tq is the engine torque (Nm), Treference is the engine reference torque (Nm), Prealratio is the percentage of actual engine torque, and Pfrictionratio is the percentage of friction torque;

[0105] The calculation formula for predicting the speed of the approaching gear in the embodiment of the present application can be:

[0106] n=i g *i 0 *u a / (0.377*r) (Formula 8)

[0107] Where n is the engine speed (r / min), i g is the transmission ratio, i 0 is the rear axle speed ratio, u a is the vehicle speed (km / h), r is the tire rolling radius (m); the embodiment of the present application can use the above formula to calculate the speed of the adjacent gear to determine whether it falls within the economic operation area.

[0108] The embodiment of the present application may assume that the vehicle is running in a steady state, and even if the vehicle speed changes slightly, it will not cause a large change in power, that is, it is assumed that the vehicle is running at a constant power; Figure 7 If we draw equal power lines on the graph we are trying to plot, we can get a graph like Fig. 9 As shown in the figure, point e2 is the operating point of the engine torque under the current vehicle speed and rotation speed (collected); after the calculation of the speed of the adjacent gear is completed, the vehicle operating point moves on the equal power line, if the adjacent gear is a high gear, it moves to point e1, if the adjacent gear is a low gear, it moves to point e3. Therefore, the speed torque of the adjacent gear can be fixed on the gear speed torque diagram, that is, the speed torque distribution diagram of the adjacent gear is determined.

[0109] In step S103, a gear shift reminder is performed when the optimal gear position is inconsistent with the current gear position.

[0110] It can be understood that the embodiments of the present application can judge the current operating condition based on the information of the above embodiments. If it is not a climbing condition, a downhill condition, an acceleration and overtaking condition, or a braking condition, a gear shift reminder mode is entered; when the current gear position is inconsistent with the optimal gear position, a gear shift reminder is performed; if the current gear position is consistent with the optimal gear position, no gear shift reminder is performed.

[0111] In summary, if Fig.10As shown, in the embodiment of the present application, during the vehicle driving process, big data of the vehicle network can be collected in real time, the current geographical scenario can be analyzed, and the vehicle operation condition data can be read; according to the data, the current condition speed-torque distribution diagram is compared and identified. If it is in the economic operation area, no shift reminder is issued; if it is not in the economic operation area, the speed-torque distribution diagram of the adjacent gear is calculated and exported, the gear corresponding to the optimal speed-torque distribution diagram is found, and a shift reminder is issued; if not found, the gear closest to the optimal speed-torque distribution diagram is taken, a shift reminder is issued, and if there is no gear close to the optimal speed-torque bubble diagram, no shift reminder is issued.

[0112] According to the shift reminder method proposed by the embodiment of the present application, the current operation condition of the vehicle can be identified to match the best gear for the vehicle to meet the economic fuel consumption area, and a shift reminder is made when the current gear is inconsistent with the best gear; thus, the driver can be reminded to optimize the shift operation under steady-state conditions, improve the vehicle economy, avoid excessive reminder information interfering with driving, and enhance the driver's driving experience.

[0113] Next, a shift reminder device according to an embodiment of the present application will be described with reference to the accompanying drawings.

[0114] Fig.10 It is a block diagram of the shift reminder device according to the embodiment of the present application.

[0115] As Fig.10 shown, the shift reminder device 10 includes: an identification module 100, a determination module 200, and a reminder module 300.

[0116] Among them, the identification module 100 is used to identify the current operation condition of the vehicle; the determination module 200 is used to obtain the current operation parameters of the vehicle engine when the current operation condition is a preset condition that meets the stable operation condition, and determine the best gear for the vehicle to meet the economic fuel consumption area according to the current operation parameters; the reminder module 300 is used to give a shift reminder when the best gear is inconsistent with the current gear.

[0117] Optionally, the determination module 200 is further used to: obtain the universal characteristic map of the engine and the economic fuel consumption area of the universal characteristic map; identify the current fuel consumption in the current area of the universal characteristic map according to the current operation parameters; if the current area is in the economic fuel consumption area, use the gear corresponding to the current area as the best gear, if the current area is not in the economic fuel consumption area, obtain the adjacent economic fuel consumption area of the current area, and use the gear corresponding to the adjacent economic fuel consumption area as the best gear, otherwise no shift reminder is made.

[0118] Optionally, the determination module 200 is further used to: obtain a first curve of the minimum fuel consumption rate under the engine torque, a second curve of the minimum fuel consumption rate under the engine power, and a third curve of the minimum fuel consumption rate under the engine speed; generate a universal characteristic diagram according to the first curve, the second curve and the third curve, and determine one or more economic fuel consumption areas according to the intersection area of ​​the first curve, the second curve and the third curve.

[0119] Optionally, the current operating parameters include current torque, current power and current speed, and the determination module 200 is further used to determine a current area corresponding to the current fuel consumption in the universal characteristic diagram according to the current torque, current power and current speed.

[0120] Optionally, the determination module 200 is further used to: generate a current gear, speed and torque distribution map based on the engine speed and the engine torque; superimpose the current gear, speed and torque distribution map onto the universal characteristic map to obtain an adjacent gear, speed and torque distribution map, and identify the economic fuel consumption area along the engine speed direction from the adjacent gear, speed and torque distribution map; and use the economic fuel consumption area closest to the intersection area as the adjacent economic fuel consumption area of ​​the current area.

[0121] Optionally, the determination module 200 is further used to: calculate the predicted speed of the adjacent gear based on the current speed of the engine; if the adjacent gear is greater than the current gear, then on the equal power line of the universal characteristic diagram, with the predicted speed as the starting point, move the current gear, speed and torque distribution diagram in the direction of decreasing speed; if the adjacent gear is less than the current gear, then on the equal power line of the universal characteristic diagram, with the predicted speed as the starting point, move the current gear, speed and torque distribution diagram in the direction of increasing speed; after the movement is completed, fix the current gear, speed and torque distribution diagram on the universal characteristic diagram to obtain the adjacent gear, speed and torque distribution diagram.

[0122] Optionally, the identification module 100 is further used to: obtain the current geographic scene and operating data of the vehicle; determine the current operating condition of the vehicle based on the current geographic scene and operating data, wherein a geographic scene reminder is performed when the geographic scene in which the vehicle is located is determined to have changed based on the current geographic scene.

[0123] It should be noted that the above explanations of the embodiment of the gear shift reminder method are also applicable to the gear shift reminder device of this embodiment, and will not be repeated here.

[0124] According to the gear shift reminder device proposed in the embodiment of the present application, the current operating condition of the vehicle can be identified to match the optimal gear position of the vehicle to meet the economic fuel consumption zone, and a gear shift reminder can be issued when the current gear position is inconsistent with the optimal gear position; thereby, the driver can be reminded to optimize the gear shift operation under steady-state conditions, improve the vehicle's economy, avoid excessive sending of reminder information to interfere with driving, and enhance the driver's driving experience.

[0125] Fig.11 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application. The vehicle may include:

[0126] A memory 1101 , a processor 1102 , and a computer program stored in the memory 1101 and executable on the processor 1102 .

[0127] When the processor 1102 executes the program, the gear shift reminder method provided in the above embodiment is implemented.

[0128] Furthermore, the vehicle also includes:

[0129] The communication interface 1103 is used for communication between the memory 1101 and the processor 1102 .

[0130] The memory 1101 is used to store computer programs that can be executed on the processor 1102 .

[0131] The memory 1101 may include a high-speed RAM (Random Access Memory) memory, and may also include a non-volatile memory, such as at least one disk memory.

[0132] If the memory 1101, the processor 1102 and the communication interface 1103 are implemented independently, the communication interface 1103, the memory 1101 and the processor 1102 can be connected to each other through a bus and communicate with each other. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.11 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0133] Optionally, in a specific implementation, if the memory 1101, the processor 1102 and the communication interface 1103 are integrated on a chip, the memory 1101, the processor 1102 and the communication interface 1103 can communicate with each other through an internal interface.

[0134] The processor 1102 may be a CPU (Central Processing Unit), or an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of the present application.

[0135] An embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the above-mentioned gear shift reminder method is implemented.

[0136] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0137] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0138] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or N executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0139] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiment, the N steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array, a field programmable gate array, etc.

[0140] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0141] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A gear shift reminder method, It is characterized in that The following steps are involved: Identify the current operating condition of the vehicle; If the current operating condition is a preset operating condition that satisfies a stable operating condition, then obtaining current operating parameters of the engine of the vehicle, and determining the optimal gear position of the vehicle that satisfies an economical fuel consumption area according to the current operating parameters; When the optimal gear position is inconsistent with the current gear position, a gear shift reminder is performed.

2. The gear shift reminder method according to claim 1, It is characterized in that The determining, according to the current operating parameters, the optimal gear position of the vehicle that satisfies the economic fuel consumption area includes: Obtaining a universal characteristic map of the engine and an economic fuel consumption area of ​​the universal characteristic map; Identifying, based on the current operating parameters, that the current fuel consumption is in a current region of the universal characteristic map; If the current area is in the economical fuel consumption area, the gear corresponding to the current area is used as the optimal gear. If the current area is not in the economical fuel consumption area, the adjacent economical fuel consumption area of ​​the current area is obtained, and the gear corresponding to the adjacent economical fuel consumption area is used as the optimal gear. Otherwise, no gear shift reminder is given.

3. The gear shift reminder method according to claim 2, It is characterized in that The step of obtaining the universal characteristic diagram of the engine and the economic fuel consumption area of ​​the universal characteristic diagram includes: Obtaining a first curve of minimum fuel consumption rate under engine torque, a second curve of minimum fuel consumption rate under engine power, and a third curve of minimum fuel consumption rate under engine speed; The universal characteristic diagram is generated according to the first curve, the second curve and the third curve, and one or more economic fuel consumption areas are determined according to the intersection area of ​​the first curve, the second curve and the third curve.

4. The gear shift reminder method according to claim 3, It is characterized in that The current operating parameters include current torque, current power and current speed, and the identifying that the current fuel consumption is in the current area of ​​the universal characteristic diagram according to the current operating parameters includes: A current region corresponding to the current fuel consumption in the universal characteristic diagram is determined according to the current torque, the current power and the current speed.

5. The gear shift reminder method according to claim 3, It is characterized in that The obtaining of the adjacent economic fuel consumption area of ​​the current area includes: Based on the engine speed and engine torque, generating a current gear, speed and torque distribution map; superimposing the current gear, speed and torque distribution map onto the universal characteristic map to obtain an adjacent gear, speed and torque distribution map, and identifying an economic fuel consumption area along the engine speed direction from the adjacent gear, speed and torque distribution map; The economic fuel consumption area closest to the intersection area is used as the adjacent economic fuel consumption area of ​​the current area.

6. The gear shift reminder method according to claim 5, It is characterized in that The step of superimposing the current gear, speed and torque distribution diagram onto the universal characteristic diagram to obtain an adjacent gear, speed and torque distribution diagram includes: Calculate the predicted speed of the next gear according to the current speed of the engine; If the adjacent gear is greater than the current gear, then on the equal power line of the universal characteristic diagram, with the predicted speed as the starting point, move the current gear, speed and torque distribution diagram in the direction of decreasing speed; If the adjacent gear is smaller than the current gear, on the equal power line of the universal characteristic diagram, the current gear, speed and torque distribution diagram are moved in the direction of increasing speed with the predicted speed as the starting point; After the movement is completed, the current gear position, rotation speed and torque distribution diagram are fixed on the universal characteristic diagram to obtain the adjacent gear position, rotation speed and torque distribution diagram.

7. The gear shift reminder method according to claim 1, It is characterized in that The identifying the current operating condition of the vehicle includes: Obtaining current geographic scene and operating data of the vehicle; The current operating condition of the vehicle is determined based on the current geographical scene and the operating data, wherein a geographical scene reminder is performed if it is determined based on the current geographical scene that the geographical scene in which the vehicle is located changes.

8. A gear shift reminder device, It is characterized in that include: An identification module, used to identify the current operating condition of the vehicle; a determination module, configured to obtain current operating parameters of the engine of the vehicle if the current operating condition is a preset operating condition that satisfies a stable operating condition, and determine an optimal gear position of the vehicle that satisfies an economic fuel consumption area according to the current operating parameters; The reminder module is used to remind the user to shift gears when the optimal gear position is inconsistent with the current gear position.

9. A vehicle, It is characterized in that include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the gear shift reminder method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, It is characterized in that The program is executed by a processor to implement the gear shift reminder method as described in any one of claims 1 to 7.

Images