A gear control method and device, vehicle and storage medium

Abstract

The application relates to the technical field of vehicles, and particularly discloses a gear control method and device, a vehicle and a storage medium, the gear control method comprises the following steps: acquiring road condition information in front of the vehicle; evaluating whether the vehicle meets external coasting conditions based on the road condition information; if the vehicle meets the external coasting conditions, acquiring driving information of the vehicle, wherein the driving information at least comprises a vehicle speed, a position of a throttle pedal, an engine speed, a current gear, a fault message and a current working condition of the engine; evaluating whether the vehicle meets internal coasting conditions based on the driving information; and if the vehicle meets the internal coasting conditions, controlling the gear of the vehicle to be engaged in a neutral gear. The gear control method not only judges whether the external coasting conditions are met through the road condition information, but also evaluates whether the vehicle meets the internal coasting conditions through the driving information, so that the vehicle is controlled to enter the neutral gear coasting only when both conditions are met, the safety of the vehicle during the neutral gear coasting is ensured, and the fuel economy is realized.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a gear control method, device, vehicle, and storage medium. Background Technology

[0002] If a driver removes their foot from the accelerator while driving at high speed on a road with good road conditions, the vehicle is coasting (carrying operation). Typically, when coasting conditions are met, a control device located in the vehicle cuts off fuel injection to the engine, allowing the engine to continue rotating without fuel injection. The engine speed is maintained at a low idle speed, improving fuel efficiency.

[0003] However, in existing technologies, when controlling whether a vehicle needs to coast, the slope of the downhill section is usually used for assessment, but the vehicle's own condition is ignored as to whether it is suitable to enter the coasting mode, which can easily lead to safety accidents. Summary of the Invention

[0004] The purpose of this invention is to provide a gear control method, device, vehicle, and storage medium to solve the problem that in the prior art, when controlling whether a vehicle needs to coast, the assessment is usually based on the slope of the downhill section, but the vehicle's own condition is ignored as to whether it is suitable to enter the coasting mode, which can easily lead to safety accidents.

[0005] On one hand, the present invention provides a gear control method, the gear control method comprising:

[0006] Obtain road condition information ahead of the vehicle, including the first gradient of the road and the curvature of the first gradient;

[0007] Based on the road condition information, assess whether the vehicle meets the external gliding conditions;

[0008] If the vehicle meets the external coasting conditions, the vehicle's driving information is obtained. The driving information includes at least the vehicle speed, accelerator pedal position, engine speed, current gear, fault message, and the engine's current operating condition. The engine's current operating condition includes normal operating condition and regenerative operating condition.

[0009] Based on the driving information, assess whether the vehicle meets the inherent gliding conditions;

[0010] If the vehicle meets the inherent coasting conditions, the vehicle's gear is shifted into neutral.

[0011] As a preferred embodiment of the gear control method, the gear control method further includes, after the gear of the vehicle is shifted into neutral:

[0012] Obtain the second gradient of the road ahead of the vehicle;

[0013] Determine whether the second slope is greater than the first threshold;

[0014] If the second slope exceeds the first threshold, the vehicle's gear is controlled to shift out of neutral and into a driving gear.

[0015] As a preferred technical solution for gear control, assessing whether the vehicle meets external coasting conditions based on the road condition information includes:

[0016] Determine whether the first slope is less than the second threshold;

[0017] Determine whether the curvature of the bending is greater than a third threshold;

[0018] If the first slope is less than the second threshold and the curvature is greater than the third threshold, then the vehicle is determined to meet the external gliding conditions.

[0019] As a preferred technical solution for the gear control method, if the first slope is not less than the second threshold, or the curvature is not greater than the third threshold, then it is determined that the vehicle does not meet the external coasting conditions, and the process of obtaining road condition information in front of the vehicle is repeated.

[0020] As a preferred technical solution for gear control, evaluating whether the vehicle meets the inherent coasting conditions based on the driving information includes:

[0021] Determine whether the engine is operating under normal conditions;

[0022] Determine whether the vehicle speed is within a first preset range;

[0023] Determine whether the position of the accelerator pedal is within the second preset range;

[0024] Determine whether the engine speed is within the third preset range;

[0025] Determine whether the current gear position is within the set gear range;

[0026] Determine whether the fault message has been received;

[0027] If the engine is operating under normal conditions, the vehicle speed is within the first set range, the accelerator pedal position is within the second set range, the engine speed is within the third set range, the current gear is within the set gear range, and no fault message is received, then the inherent coasting conditions are determined to be met.

[0028] As a preferred technical solution for the gear control method, if the engine is in regenerative operating condition, the vehicle speed is not within the first set range, the accelerator pedal position is not within the second set range, the engine speed is not within the third set range, the current gear is not within the set gear range, or the fault message is received, then it is determined that the inherent coasting conditions are not met.

[0029] On the other hand, the present invention provides a gear control device, wherein the preferred technical solution of the gear control method includes:

[0030] The road condition information acquisition module is used to acquire road condition information in front of the vehicle, including the first slope of the road and the curvature of the first slope.

[0031] The coasting condition determination module is used to assess whether the vehicle meets the external coasting conditions based on the road condition information;

[0032] The driving information acquisition module is used to acquire the driving information of the vehicle when the vehicle meets the external coasting conditions. The driving information includes at least the vehicle speed, the position of the accelerator pedal, the engine speed, the current gear, and the fault message.

[0033] A built-in coasting condition acquisition module is used to evaluate whether the vehicle meets the inherent coasting conditions based on the driving information;

[0034] The coasting execution module is used to control the vehicle to shift into neutral when the vehicle meets the inherent coasting conditions.

[0035] As a preferred technical solution for the gear control device, the gear control device further includes:

[0036] The second slope acquisition module is used to acquire the second slope of the road conditions ahead of the vehicle.

[0037] The second slope determination module is used to determine whether the second slope is greater than the first threshold.

[0038] The driving gear execution module is used to control the vehicle to disengage from neutral and engage driving gear when the second slope exceeds the first threshold.

[0039] In another aspect, the present invention provides a vehicle comprising: an engine, a clutch, a transmission, a drive shaft, and an accelerator pedal. The clutch is used to control the connection or disconnection of the engine and the transmission. The transmission is drively connected to the drive shaft, the drive shaft is used to transmit power to the wheels, and the accelerator pedal is used to control the amount of fuel supplied to the engine. The vehicle further comprises:

[0040] The vehicle control unit is used to receive fault messages;

[0041] An electronic horizon is used to detect and acquire road condition information in front of the vehicle and send the road condition information to the driving controller. The road condition information includes the first slope of the road and the curvature of the first slope.

[0042] A speed sensor is used to detect the speed of the engine's output shaft and send the speed to the vehicle controller;

[0043] A speed sensor is used to detect the speed of the vehicle and send the vehicle speed to the driving controller;

[0044] A pedal position sensor is used to detect the position of the accelerator pedal and send the position of the accelerator pedal to the vehicle controller;

[0045] Gear position sensor, used to detect the current gear;

[0046] A differential pressure sensor is used to detect the pressure difference before and after the particle trap and send the pressure difference to the vehicle controller;

[0047] Memory, used to store one or more programs;

[0048] When the one or more programs are executed by the vehicle controller, the vehicle controller controls the vehicle to implement the gear control method described in any of the above schemes.

[0049] In another aspect, the present invention provides a storage medium storing a computer program thereon, which, when executed by a vehicle controller, enables the vehicle to implement any of the gear control methods described in the above-mentioned schemes.

[0050] The beneficial effects of this invention are as follows:

[0051] This invention provides a gear control method, device, vehicle, and storage medium. The gear control method acquires road condition information ahead of the vehicle; assesses whether the vehicle meets external coasting conditions based on the road condition information; if the vehicle meets the external coasting conditions, it acquires the vehicle's driving information; assesses whether the vehicle meets internal coasting conditions based on the driving information; and if the vehicle meets the internal coasting conditions, it controls the vehicle to shift into neutral. This gear control method not only judges whether the external coasting conditions are met based on road condition information but also assesses whether the vehicle meets the internal coasting conditions based on driving information. Only when both are met is the vehicle controlled to shift into neutral for coasting, ensuring vehicle safety while coasting in neutral and achieving fuel economy. Attached Figure Description

[0052] Figure 1 This is a flowchart of the gear control method in Embodiment 1 of the present invention;

[0053] Figure 2This is a flowchart of the gear control method in Embodiment 2 of the present invention;

[0054] Figure 3 This is a schematic diagram of the gear control device in Embodiment 3 of the present invention;

[0055] Figure 4 This is a schematic diagram of the vehicle structure in Embodiment 4 of the present invention.

[0056] In the picture:

[0057] 310. Road condition information acquisition module; 320. Coasting condition judgment module; 330. Driving information acquisition module; 340. Built-in coasting condition acquisition module; 350. Coasting execution module; 360. Second gradient acquisition module; 370. Second gradient judgment module; 380. Shift gear execution module;

[0058] 401. Engine; 402. Clutch; 403. Gearbox; 404. Vehicle controller; 405. Electronic horizon; 406. Differential pressure sensor; 407. Speed ​​sensor; 408. Speed ​​sensor; 409. Pedal position sensor; 410. Gear position sensor; 411. Memory. Detailed Implementation

[0059] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0063] Example 1

[0064] In existing technologies, when controlling whether a vehicle needs to coast, the slope of the downhill section is usually used for assessment. However, this ignores whether the vehicle's own condition is suitable for entering the coasting mode, which can easily lead to safety accidents.

[0065] To address this issue, this embodiment provides a gear control method. This gear control method is applicable to situations where automatic control of whether a vehicle is coasting is required. The gear control method can be executed by a gear control device, which can be implemented through software and / or hardware and integrated into the vehicle.

[0066] Specifically, Figure 1 The flowchart of the gear control method in Embodiment 1 of the present invention is shown below. Figure 1 The gear control method includes the following steps:

[0067] S100: Obtain road condition information ahead of the vehicle.

[0068] Road condition information includes the road's first gradient and the curvature of that gradient. Road condition information ahead of the vehicle can be obtained via an electronic horizon indicator, a digital map of the gradient, or a G-sensor. Specifically, the road condition information ahead of the vehicle refers to the road conditions within a set distance ahead of the vehicle's current location.

[0069] S110: Assess whether a vehicle meets external gliding conditions based on road condition information.

[0070] Understandably, when a vehicle is coasting on a slope, the vehicle's own weight must be sufficient to overcome the frictional force exerted on the vehicle by the road surface, and the curvature of the first slope cannot be too small. Therefore, the suitability of the slope situation that the vehicle will be on for coasting can be judged based on the first slope and the curvature of the first slope.

[0071] In S110, if the vehicle meets the external coasting conditions, then S120 is executed. If the external coasting conditions are not met, then S110 is executed to reassess the road conditions ahead of the vehicle.

[0072] S120: Obtain vehicle driving information.

[0073] Driving information includes at least vehicle speed, accelerator pedal position, engine speed, current gear, fault message, and current engine operating condition. The current engine operating condition includes normal operating condition and regenerative operating condition. The engine's output shaft speed can be detected by a speed sensor; the vehicle speed by a speed sensor; the accelerator pedal position by a pedal position sensor; the current gear by a gear position sensor; and the current engine operating condition can be determined by detecting the pressure difference across the particulate filter using a differential pressure sensor and combining this with a preset relationship chart between the pressure difference and the current engine operating condition.

[0074] S130: Assess whether the vehicle meets the inherent coasting conditions based on driving information.

[0075] It is understandable that vehicle driving information reflects the vehicle's current condition, but the current condition may not necessarily be suitable for coasting. For example, when a vehicle is in regenerative braking mode, engine emissions are likely to exceed standards, making coasting unsuitable. Similarly, when the vehicle is traveling at high speeds, the safety risks are greater, making coasting unsuitable. Therefore, determining whether a vehicle meets its inherent coasting conditions can ensure driving safety.

[0076] If the vehicle meets the inherent coasting conditions, then execute S140; if the vehicle meets the inherent coasting conditions, then execute S130.

[0077] S140: Control the vehicle's gear to shift into neutral.

[0078] However, once the vehicle meets both external and internal coasting conditions, it can be shifted into neutral to coast and achieve fuel economy.

[0079] The gear control method provided in this embodiment acquires road condition information ahead of the vehicle; assesses whether the vehicle meets external coasting conditions based on the road condition information; if the vehicle meets external coasting conditions, it acquires the vehicle's driving information; assesses whether the vehicle meets internal coasting conditions based on the driving information; if the vehicle meets internal coasting conditions, it controls the vehicle to shift into neutral. This gear control method not only judges whether external coasting conditions are met based on road condition information, but also assesses whether the vehicle meets internal coasting conditions based on driving information. Only when both are met is the vehicle controlled to shift into neutral for coasting, ensuring the safety of the vehicle while coasting in neutral, and simultaneously achieving fuel economy.

[0080] Example 2

[0081] This embodiment provides a gear control method, which is further specified based on the above embodiment one.

[0082] Specifically, Figure 2 The flowchart of the gear control method provided in Embodiment 2 of the present invention is as follows: Figure 2 As shown, the gear control method includes the following steps:

[0083] S200: Obtain road condition information ahead of the vehicle.

[0084] S210: Assess whether a vehicle meets external gliding conditions based on road condition information.

[0085] S210 includes the following steps:

[0086] Determine whether the first slope is less than the second threshold, and determine whether the curvature is greater than the third threshold.

[0087] If the first slope is less than the second threshold and the curvature is greater than the third threshold, the vehicle is determined to meet the external coasting conditions, and S220 is executed; if the first slope is not less than the second threshold or the curvature is not greater than the third threshold, the vehicle is determined not to meet the external coasting conditions, and S210 is executed again.

[0088] The values ​​of the second and third thresholds can be set as needed. In this embodiment, the second threshold can be -30°. When the first slope is less than the second threshold and the curvature is greater than the third threshold, it can be considered that the external environment meets the requirements for the vehicle to coast on the first slope. When the first slope is not less than the second threshold, or the curvature is not greater than the third threshold, it indicates that the external environment does not meet the requirements for the vehicle to coast on the slope, such as the slope being too shallow.

[0089] S220: Obtain vehicle driving information.

[0090] S230: Assess whether a vehicle meets the inherent coasting conditions based on driving information.

[0091] S230 includes the following steps:

[0092] Simultaneously determine: whether the engine is operating normally; whether the vehicle speed is within the first set range; whether the accelerator pedal position is within the second set range; whether the engine speed is within the third set range; whether the current gear is within the set gear range; and whether a fault message has been received.

[0093] If the engine is operating under normal conditions, the vehicle speed is within the first set range, the accelerator pedal position is within the second set range, the engine speed is within the third set range, the current gear is within the set gear range, and no fault message is received, then the inherent coasting conditions are determined to be met and S240 is executed; if the engine is operating under regenerative conditions, the vehicle speed is not within the first set range, the accelerator pedal position is not within the second set range, the engine speed is not within the third set range, the current gear is not within the set gear range, or a fault message is received, then the inherent coasting conditions are determined to be unmet and S230 is executed again.

[0094] The first, second, and third setting ranges, as well as the set gear range, can be set as needed. The vehicle controller can obtain fault messages by interacting with the vehicle controller. When the engine is operating normally, the vehicle speed is within the first setting range, the accelerator pedal position is within the second setting range, the engine speed is within the third setting range, the current gear is within the set gear range, and no fault message is received, it indicates that the vehicle has no fault reported, and the vehicle speed, accelerator pedal position, engine speed, current gear, and current engine operating condition are all in a suitable state. There is no safety hazard in the vehicle entering neutral coasting, thus confirming that the inherent coasting conditions are met. If any of the above conditions are not met, it indicates that there is a safety hazard in the vehicle. To ensure driving safety, the vehicle is not allowed to enter neutral coasting, therefore it is determined that the inherent coasting conditions are not met.

[0095] S240: Controls the vehicle's gear to be shifted into neutral.

[0096] S250: Obtain the second gradient of the road ahead of the vehicle.

[0097] S260: Determine whether the second slope is greater than the first threshold.

[0098] The first threshold can be set according to the specific type of vehicle. In this embodiment, the second slope is exemplarily given as -5°.

[0099] If the second slope is greater than the first threshold, then execute S270. If the second slope is not greater than the first threshold, then execute S250.

[0100] S270: Controls the vehicle's gear shift from neutral to drive.

[0101] When the second gradient is greater than the first threshold, it indicates that the road surface gradient is relatively gentle, and the vehicle needs to be actively driven to move, and it is not suitable for coasting in neutral.

[0102] The gear control method provided in this embodiment, based on the above embodiment one, determines whether the second slope of the road ahead of the vehicle is greater than the first threshold when the vehicle is coasting in neutral. If the second slope is greater than the first threshold, the vehicle is controlled to exit neutral and engage a driving gear to avoid a decrease in vehicle speed.

[0103] Example 3

[0104] This embodiment provides a gear control device that can execute the gear control method described in the above embodiment.

[0105] Specifically, Figure 3 This is a structural diagram of a gear control device provided in Embodiment 3 of the present invention, as shown below. Figure 3 As shown, the gear control device includes a road condition information acquisition module 310, a coasting condition judgment module 320, a driving information acquisition module 330, a built-in coasting condition acquisition module 340, and a coasting execution module 350. Specifically, the road condition information acquisition module 310 acquires road condition information ahead of the vehicle; the coasting condition judgment module 320 assesses whether the vehicle meets external coasting conditions based on the road condition information; the driving information acquisition module 330 acquires the vehicle's driving information when the external coasting conditions are met; the built-in coasting condition acquisition module 340 assesses whether the vehicle meets internal coasting conditions based on the driving information; and the coasting execution module 350 controls the vehicle to shift into neutral when the internal coasting conditions are met.

[0106] Optionally, the gear control device further includes a second slope acquisition module 360, a second slope judgment module 370, and a gear shift execution module 380. The second slope acquisition module 360 ​​acquires the second slope of the road ahead of the vehicle; the second slope judgment module 370 determines whether the second slope is greater than a first threshold; and the gear shift execution module 380 controls the vehicle to shift out of neutral and into a driving gear when the second slope is greater than the first threshold.

[0107] The coasting condition determination module 320 includes a first slope determination unit, a curvature determination unit, and a first determination unit. The first slope determination unit determines whether the first slope is less than a second threshold. The curvature determination unit determines whether the curvature is greater than a third threshold. When the first slope is less than the second threshold and the curvature is greater than the third threshold, the first determination unit determines that the vehicle meets the external coasting conditions.

[0108] The built-in coasting condition acquisition module 340 includes an operating condition judgment unit, a vehicle speed judgment unit, a pedal position judgment unit, an engine speed judgment unit, a current gear judgment unit, a fault message judgment unit, a second determination unit, and a third determination unit. The operating condition judgment unit determines whether the engine is operating under normal conditions; the vehicle speed judgment unit determines whether the vehicle speed is within a first set range; the pedal position judgment unit determines whether the accelerator pedal position is within a second set range; the engine speed judgment unit determines whether the engine speed is within a third set range; the current gear judgment unit determines whether the current gear is within a set gear range; the fault message judgment unit determines whether a fault message has been received; and the second determination unit determines that the inherent coasting conditions are met when the engine is operating under normal conditions, the vehicle speed is within the first set range, the accelerator pedal position is within the second set range, the engine speed is within the third set range, the current gear is within a set gear range, and no fault message has been received. The third determining unit is used to determine that the inherent coasting conditions are not met when the engine is in regenerative condition, the vehicle speed is not within the first set range, the accelerator pedal position is not within the second set range, the engine speed is not within the third set range, the current gear is not within the set gear range, or a fault message is received.

[0109] Embodiment 3 of the present invention provides a gear control device. A road condition information acquisition module 310 acquires road condition information ahead of the vehicle; a coasting condition judgment module 320 assesses whether the vehicle meets external coasting conditions based on the road condition information; when the vehicle meets the external coasting conditions, a driving information acquisition module 330 acquires the vehicle's driving information; an internal coasting condition acquisition module 340 assesses whether the vehicle meets internal coasting conditions based on the driving information; and when the vehicle meets the internal coasting conditions, a coasting execution module 350 controls the vehicle to shift into neutral. This gear control device not only judges whether external coasting conditions are met based on road condition information but also assesses whether the vehicle meets internal coasting conditions based on driving information. Only when both are met is the vehicle controlled to shift into neutral for coasting, ensuring vehicle safety during neutral coasting while simultaneously achieving fuel economy.

[0110] Example 4

[0111] This embodiment provides a vehicle. For example... Figure 4 As shown, Figure 4 This is a schematic diagram of the vehicle structure in Embodiment 4 of the present invention. The vehicle includes an engine 401, a clutch 402, a gearbox 403, a drive shaft, an accelerator pedal, a vehicle controller 404, an electronic horizon sensor 405, a differential pressure sensor 406, a speed sensor 407, a speed sensor 408, a pedal position sensor 409, a gear position sensor 410, and a memory 411. Figure 4As shown, exemplarily, engine 401, clutch 402, gearbox 403, drive shaft, accelerator pedal, vehicle controller 404, electronic horizon 405, differential pressure sensor 406, speed sensor 407, speed sensor 408, pedal position sensor 409, gear position sensor 410, and memory 411 are connected by a bus.

[0112] The engagement and disengagement of clutch 402 can be controlled by vehicle controller 404. Specifically, a solenoid valve is installed in the oil circuit of the clutch 402 cylinder. The vehicle controller 404 controls the oil circuit to supply or release oil to the cylinder through the solenoid valve, thereby controlling the engagement and disengagement of clutch 402. When clutch 402 is engaged, the engine 401 outputs power to the transmission 403. When clutch 402 is disengaged, the power output by engine 401 cannot be transmitted to transmission 403. Transmission 403 is connected to drive shaft, which is used to transmit power to the wheels.

[0113] The transmission 403 has a gear selector that can move between several positions, enabling the transmission 403 to switch between driving gear, reverse gear and neutral gear. When the transmission 403 is in neutral gear, the transmission 403 cannot transmit power to the drive shaft. When the transmission 403 is in driving gear, the transmission 403 can transmit power to the drive axle.

[0114] The vehicle controller 404 is used to receive fault messages; the electronic horizon 405 is used to detect and acquire road condition information in front of the vehicle and send the road condition information to the vehicle controller 404, including the first slope of the road and the curvature of the first slope; the differential pressure sensor 406 is used to detect the pressure difference before and after the particulate filter and send the pressure difference to the vehicle controller 404; the speed sensor 407 is used to detect the speed of the output shaft of the engine 401 and send the speed to the vehicle controller 404; the speed sensor 408 is used to detect the speed of the vehicle and send the speed to the vehicle controller 404; the pedal position sensor 409 is used to detect the position of the accelerator pedal and send the position of the accelerator pedal to the vehicle controller 404; and the gear position sensor 410 is used to detect the current gear.

[0115] The memory 411, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the gear control method in the embodiments of the present invention. The vehicle controller 404 executes various vehicle functions and data processing by running the software programs, instructions, and modules stored in the memory 411, thereby realizing the gear control method of the above embodiments.

[0116] The memory 411 primarily includes a program storage area and a data storage area. The program storage area stores the operating system and at least one application program required for a given function; the data storage area stores data created based on terminal usage. Furthermore, the memory 411 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, the memory 411 may further include memory remotely configured relative to the vehicle controller 404, which can be connected to the vehicle via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0117] The vehicle provided in Embodiment 4 of the present invention and the gear control method provided in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments. Furthermore, this embodiment has the same beneficial effects as the gear control method.

[0118] Example 5

[0119] Embodiment 5 of the present invention also provides a storage medium storing a computer program thereon, which, when executed by the vehicle controller, enables the vehicle to implement the gear control method as described in the above embodiments of the present invention.

[0120] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A gear control method, characterized in that, include: Obtain road condition information ahead of the vehicle, including the first gradient of the road and the curvature of the first gradient; Based on the road condition information, assess whether the vehicle meets the external gliding conditions; If the vehicle meets the external coasting conditions, the vehicle's driving information is obtained. The driving information includes at least the vehicle speed, accelerator pedal position, engine speed, current gear, fault message, and the engine's current operating condition. The engine's current operating condition includes normal operating condition and regenerative operating condition. Based on the driving information, assess whether the vehicle meets the inherent gliding conditions; If the vehicle meets the inherent coasting conditions, the vehicle's gear is shifted into neutral. Assessing whether a vehicle meets external gliding conditions based on the aforementioned road condition information includes: Determine whether the first slope is less than the second threshold so that the vehicle's own gravity can overcome the friction force exerted on the vehicle by the road surface. Determine whether the curvature of the bending is greater than a third threshold; If the first slope is less than the second threshold and the curvature is greater than the third threshold, then the vehicle is determined to meet the external gliding conditions. Assessing whether a vehicle meets the inherent coasting conditions based on the aforementioned driving information includes: Determine whether the engine is operating under normal conditions; Determine whether the vehicle speed is within a first preset range; Determine whether the position of the accelerator pedal is within the second preset range; Determine whether the engine speed is within the third preset range; Determine whether the current gear position is within the set gear range; Determine whether the fault message has been received; If the engine is operating under normal conditions, the vehicle speed is within the first set range, the accelerator pedal position is within the second set range, the engine speed is within the third set range, the current gear is within the set gear range, and no fault message is received, then the inherent coasting conditions are determined to be met. If the engine is in regenerative operating condition, the vehicle speed is not within the first set range, the accelerator pedal position is not within the second set range, the engine speed is not within the third set range, the current gear is not within the set gear range, or the fault message is received, then it is determined that the inherent coasting conditions are not met.

2. The gear control method according to claim 1, characterized in that, The gear control method also includes the following after the vehicle is shifted into neutral: Obtain the second gradient of the road ahead of the vehicle; Determine whether the second slope is greater than the first threshold; If the second slope exceeds the first threshold, the vehicle's gear is controlled to shift out of neutral and into a driving gear.

3. The gear control method according to claim 1, characterized in that, If the first slope is not less than the second threshold, or the curvature is not greater than the third threshold, then it is determined that the vehicle does not meet the external gliding conditions, and the process of obtaining road condition information in front of the vehicle is repeated.

4. A gear control device, characterized in that, include: The road condition information acquisition module is used to acquire road condition information in front of the vehicle, including the first slope of the road and the curvature of the first slope. The coasting condition determination module is used to assess whether the vehicle meets the external coasting conditions based on the road condition information; The driving information acquisition module is used to acquire the driving information of the vehicle when the vehicle meets the external coasting conditions. The driving information includes at least the vehicle speed, the position of the accelerator pedal, the engine speed, the current gear, the fault message, and the current operating condition of the engine. The current operating condition of the engine includes normal operating condition and regenerative operating condition. A built-in coasting condition acquisition module is used to evaluate whether the vehicle meets the inherent coasting conditions based on the driving information; The coasting execution module is used to control the vehicle to shift into neutral when the vehicle meets the inherent coasting conditions. Assessing whether a vehicle meets external gliding conditions based on the aforementioned road condition information includes: Determine whether the first slope is less than the second threshold so that the vehicle's own gravity can overcome the friction force exerted on the vehicle by the road surface. Determine whether the curvature of the bending is greater than a third threshold; If the first slope is less than the second threshold and the curvature is greater than the third threshold, then the vehicle is determined to meet the external gliding conditions. Assessing whether a vehicle meets the inherent coasting conditions based on the aforementioned driving information includes: Determine whether the engine is operating under normal conditions; Determine whether the vehicle speed is within a first preset range; Determine whether the position of the accelerator pedal is within the second preset range; Determine whether the engine speed is within the third preset range; Determine whether the current gear position is within the set gear range; Determine whether the fault message has been received; If the engine is operating under normal conditions, the vehicle speed is within the first set range, the accelerator pedal position is within the second set range, the engine speed is within the third set range, the current gear is within the set gear range, and no fault message is received, then the inherent coasting conditions are determined to be met. If the engine is in regenerative operating condition, the vehicle speed is not within the first set range, the accelerator pedal position is not within the second set range, the engine speed is not within the third set range, the current gear is not within the set gear range, or the fault message is received, then it is determined that the inherent coasting conditions are not met.

5. The gear control device according to claim 4, characterized in that, The gear control device also includes: The second slope acquisition module is used to acquire the second slope of the road conditions ahead of the vehicle. The second slope determination module is used to determine whether the second slope is greater than the first threshold. The driving gear execution module is used to control the vehicle to disengage from neutral and engage driving gear when the second slope exceeds the first threshold.

6. A vehicle comprising: The vehicle comprises an engine, a clutch, a transmission, a drive shaft, and an accelerator pedal. The clutch controls the connection or disconnection of the engine and the transmission. The transmission is drive-connected to the drive shaft, which transmits power to the wheels. The accelerator pedal controls the amount of fuel supplied to the engine. The vehicle further comprises: The vehicle control unit is used to receive fault messages; An electronic horizon is used to detect and acquire road condition information in front of the vehicle and send the road condition information to the driving controller. The road condition information includes the first slope of the road and the curvature of the first slope. A speed sensor is used to detect the speed of the engine's output shaft and send the speed to the vehicle controller; A speed sensor is used to detect the speed of the vehicle and send the vehicle speed to the driving controller; A pedal position sensor is used to detect the position of the accelerator pedal and send the position of the accelerator pedal to the vehicle controller; Gear position sensor, used to detect the current gear; A differential pressure sensor is used to detect the pressure difference before and after the particle trap and send the pressure difference to the vehicle controller; Memory, used to store one or more programs; When the one or more programs are executed by the vehicle controller, the vehicle controller controls the vehicle to implement the gear control method as described in any one of claims 1-3.

7. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by the vehicle controller, the vehicle implements the gear control method as described in any one of claims 1-3.

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