Mistaken touch prevention gear shifting control method and device of electronic gear shifting system without unlocking key and vehicle

Abstract

The invention discloses a mistaken touch prevention gear shifting control method and device of an electronic gear shifting system without an unlocking key and a vehicle. The method comprises the steps that when a vehicle runs at a D gear / R gear, the vehicle speed is divided into a high-speed mode, a low-speed mode and a start-stop mode according to the vehicle speed from high to low; the filtering time of the N-gear signals is prolonged, and a response time threshold value is set; determining a current gear of the vehicle based on the gear signal; determining a target gear based on the shift lever position signal and the current gear; the real-time vehicle speed and the brake state of the vehicle are obtained; determining a gear shifting strategy based on the current gear, the target gear, the real-time vehicle speed and the brake state; and executing the gear shifting strategy based on the filtering time of the N-gear signal and the response time threshold. By dividing the vehicle speed modes, prolonging the N-gear signal filtering time and setting the response time threshold value, improper gear shifting caused by misoperation can be effectively reduced, the safety and stability of vehicle driving are improved, and the safety of a driver and passengers is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle shift control, and more specifically, relates to an anti-mistouch shift control method and device for an electronic shift system without an unlocking button, and a vehicle. Background Art

[0002] At present, the electronic shifting system of the whole vehicle tends to be compact and beautiful in structure due to cost and styling considerations, and the unlocking on the hand ball is gradually cancelled. When the vehicle is in D gear / R gear, the electronic shifting system without unlocking button cannot determine whether the push of the gear lever is subjective or misoperation due to the lack of unlocking button on the gear shifting. If the gear lever is touched by mistake, the gear position is likely to change to N gear, causing power interruption, and there is no acceleration response when pressing the accelerator pedal, which is easy to cause danger when overtaking. The shifting strategy of the existing electronic shifting system with unlocking button is as follows: the three signals of vehicle speed, unlocking and braking need to be determined when the D gear changes to R gear. When the vehicle speed condition is met, if any of the unlocking and braking conditions are not met, it can be determined that the customer has misoperated; the vehicle speed and unlocking button need to be determined when the vehicle speed changes to N gear. If the unlocking button is pressed when the vehicle speed is too fast, it is necessary to press the unlocking button to shift into gear. If the unlocking button is not pressed, it is determined to be a misoperation; by judging whether the unlocking button is pressed, it is determined whether it is a misoperation by the customer or an active gear shifting request, so as to protect the gear position strategy of the whole vehicle. The existing shifting strategy of the electronic shifting system without an unlocking button is as follows: the shifting from D gear to R gear requires the determination of two signals, namely, vehicle speed and brake. When the brake is applied, it is impossible to determine whether the shifting of the gear lever is an active operation or an erroneous operation by the customer; the strategy for shifting from D gear to N gear: considering the road conditions that require high-speed N gear gliding in the national fuel consumption test for vehicle models and the operating habits of some customers who are accustomed to gliding in N gear, the requirement of entering N gear must be met at any speed of the vehicle, and the gear lever only needs to be moved forward one step to enter N gear, and it is impossible to determine whether it is an active operation or an erroneous operation by the customer; the shifting mechanism without an unlocking button cannot determine whether the shifting request is an erroneous operation or an active request by the customer, and cannot respond to the corresponding protection strategy.

[0003] The invention patent with publication number CN112377613A discloses a shift control method for an automotive electronic shift system, which can prevent the driver from misoperating or children from accidentally touching the gear by limiting the shifting through multiple signals. However, for an electronic shift system without an unlocking button, when the gear position of the entire vehicle changes due to misoperation, it is impossible to distinguish between misoperation and active operation.

[0004] The invention patent with the publication number CN116292859A discloses a safety control method for an electronic shift mechanism to move out of the D gear. When the car is driving in the D gear, the vehicle speed is divided into three modes: high-speed mode, low-speed mode, and start-stop mode according to the vehicle speed. Different shift control methods are used for different modes, and whether the unlock button is pressed is considered during the control process to avoid the power interruption caused by the accidental touch of the gear lever when the car is driving in the D gear in the high-speed mode, thereby ensuring driving safety. However, for the electronic shift system without an unlock button, when the gear position of the whole vehicle changes due to an erroneous operation, it is not possible to distinguish between erroneous operation and active operation, and only the erroneous touch in the D gear is considered, and the erroneous touch in the R gear is not considered.

[0005] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0006] The purpose of the present invention is to propose an anti-mistouch shift control method, device and vehicle for an electronic shift system without an unlocking button, so as to solve the problem that since there is no unlocking button on the shift lever, it is impossible to determine whether the shift lever is pushed subjectively or by mistake, and the gear position is easily changed to N gear when the shift lever is touched by mistake, causing power interruption, no acceleration response when the accelerator pedal is pressed, and danger is easy to occur in overtaking and other situations.

[0007] To achieve the above-mentioned purpose, the present invention proposes a method, a device and a vehicle for preventing accidental shifting of an electronic shifting system without an unlocking button.

[0008] According to a first aspect of the present invention, a method for preventing accidental shifting of an electronic shifting system without an unlocking button is provided, comprising:

[0009] When the vehicle is running in D / R gear, the vehicle speed is divided into high speed mode, low speed mode and start-stop mode according to the vehicle speed from high to low;

[0010] Extend the filtering time of the N-level signal and set the response time threshold;

[0011] determining a current gear position of the vehicle based on the gear position signal;

[0012] determining a target gear position based on the shift lever position signal and the current gear position;

[0013] Obtaining the real-time speed and brake status of the vehicle;

[0014] Determining a gear shift strategy based on the current gear, the target gear, the real-time vehicle speed and the brake status;

[0015] The shift strategy is executed based on the filtering time and the response time threshold of the N gear signal.

[0016] Optionally, the high speed mode, low speed mode and start-stop mode are respectively:

[0017] High-speed mode: real-time vehicle speed> 3km / h;

[0018] Low speed mode: 0<real-time vehicle speed≤3km / h;

[0019] Start-stop mode: real-time vehicle speed = 0km / h.

[0020] Optionally, the shift strategy includes:

[0021] When the current gear is D gear and the target gear is N gear, if the vehicle is currently in the start-stop mode / low-speed mode and the gear shift lever is in the N gear for a time period greater than or equal to the filtering time, in response to the gear shift request, the gear signal is N gear;

[0022] If the shift lever is in the N gear for a time period that is shorter than the filtering time, the shift request is not responded to, and the gear position signal is the D gear.

[0023] Optionally, the shift strategy includes:

[0024] When the current gear is D gear and the target gear is N gear, if the vehicle is currently in high-speed mode and the gear-in time of the shift lever in N gear is greater than or equal to the filtering time but less than the response time threshold, the gear shift request is not responded to and the gear signal is D gear;

[0025] If the shift lever is in gear N for a time period shorter than the filtering time, the shift request is not responded to, the gear position signal is D gear, and a prompt "vehicle speed is too high to shift gears" is given;

[0026] If the shift lever is in the N gear for a time period that is greater than or equal to the filtering time and greater than or equal to the response time threshold, then in response to a shift request, the gear position signal is the N gear.

[0027] Optionally, the shift strategy includes:

[0028] When the current gear is D gear and the target gear is R gear, if the vehicle is currently in the start-stop mode / low-speed mode, the gear shift lever is in the R gear for a time period greater than or equal to the filter time of the R gear, and the brake signal is not received, the gear shift request is not responded to, the gear signal is D gear, and a prompt "press the brake pedal to shift gears" is given;

[0029] If the vehicle is currently in the start-stop mode / low-speed mode, the shift lever is in the R gear for a time period greater than or equal to the filtering time of the R gear, and the brake signal is received, then in response to the shift request, the gear position signal is the R gear;

[0030] If the vehicle is currently in high-speed mode, the shift lever is in R gear for a time that is greater than or equal to the filtering time of R gear, and the brake signal is received, then in response to the shift request, the gear position signal is N gear, and a prompt "vehicle speed is too high to shift gears" is given.

[0031] Optionally, the shift strategy includes:

[0032] When the current gear is R and the target gear is N, if the vehicle is currently in the start-stop mode and the shift lever is in N for a time greater than or equal to the filtering time of N, then in response to the shift request, the gear signal is N;

[0033] When the current gear is R and the target gear is D, if the vehicle is currently in low speed mode and the gear shift lever is in D for a time period greater than or equal to the filtering time of D, then in response to a gear shift request, the gear signal is D;

[0034] When the current gear is R and the target gear is D, if the vehicle is currently in high-speed mode and the shift lever is in D for a time that is greater than or equal to the filtering time of D, the shift request will not be responded to, the gear signal will be N, and a prompt will be given that "the vehicle speed is too high and cannot shift gears".

[0035] Optionally, a gear position light of the vehicle lights up corresponding to the execution result of the gear shift strategy.

[0036] Optionally, the filtering time of the N-level signal is:

[0037] 400ms;

[0038] The response time threshold is:

[0039] 2s.

[0040] Optionally, the method for determining the target gear position based on the gear shift lever position signal and the current gear position includes:

[0041] The target gear is R: the current gear is any gear, and the shift lever position signal is a forward 2-step signal; or the current gear is R or N, and the shift lever position signal is a forward 1-step signal;

[0042] The target gear position is D: the current gear position is R or N or P or D, and the shift lever position signal is a backward 2-step signal; or the current gear position is D or N, and the shift lever position signal is a backward 1-step signal;

[0043] The target gear position is N: the current gear position is D, and the shift lever position signal is a 1-step forward signal; the current gear position is P, and the shift lever position signal is a 1-step forward signal or a 1-step backward signal; or the current gear position is R, and the shift lever position signal is a 1-step backward signal.

[0044] According to a second aspect of the present invention, a mis-touch shift control device for an electronic shift system without an unlocking button is provided, comprising:

[0045] A division module is used to divide the vehicle speed into a high speed mode, a low speed mode and a start-stop mode according to the vehicle speed from high to low when the vehicle is driving in the D gear or the R gear;

[0046] A setting module, used to extend the filtering time of the N-level signal and set the response time threshold;

[0047] A first determination module, configured to determine a current gear position of the vehicle based on the gear position signal;

[0048] a second determination module, configured to determine a target gear position based on a shift lever position signal and the current gear position;

[0049] An acquisition module, used to acquire the real-time speed and braking status of the vehicle;

[0050] A third determination module, configured to determine a shift strategy based on the current gear position, the target gear position, the real-time vehicle speed and the braking state;

[0051] An execution module is used to execute the shift strategy based on the filtering time and response time threshold of the N gear signal.

[0052] According to a third aspect of the present invention, a vehicle is provided, the vehicle comprising the anti-mistouch shift control device of the electronic shift system without unlocking button as described in the second aspect.

[0053] The beneficial effects of the present invention are: dividing the vehicle speed into high-speed mode, low-speed mode and start-stop mode according to the speed from high to low, so that the vehicle can match a more appropriate gear control strategy in different speed ranges to ensure driving safety. Extend the filtering time of the N-gear signal and set the response time threshold, determine the current gear of the vehicle based on the gear signal; determine the target gear based on the shift lever position signal and the current gear; obtain the real-time speed and braking status of the vehicle; determine the shift strategy based on the current gear, target gear, real-time speed and braking status; execute the shift strategy based on the filtering time and response time threshold of the N-gear signal, which can effectively reduce the false triggering and interference of the N-gear signal, ensure the accuracy and reliability of the shift operation, thereby improving the operational safety and stability of the vehicle control system, and reducing the safety hazards caused by misoperation or signal abnormality.

[0054] The system of the present invention has other characteristics and advantages, which will be apparent from the drawings incorporated herein and the following detailed description, or will be described in detail in the drawings incorporated herein and the following detailed description, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, in which like reference numerals generally represent like components.

[0056] Figure 1 A flowchart showing the steps of a method for preventing mis-touch shifting of an electronic shifting system without an unlocking button according to Embodiment 1 of the present invention is shown.

[0057] Figure 2 A schematic diagram of shifting of gears according to Embodiment 1 of the present invention is shown. DETAILED DESCRIPTION

[0058] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0059] Example 1

[0060] like Figure 1 As shown, this embodiment provides an anti-mistouch shift control method for an electronic shift system without an unlocking button, comprising:

[0061] When the vehicle is running in D / R gear, the vehicle speed is divided into high speed mode, low speed mode and start-stop mode according to the vehicle speed from high to low;

[0062] Extend the filtering time of the N-level signal and set the response time threshold;

[0063] determining a current gear position of the vehicle based on the gear position signal;

[0064] determining a target gear position based on the shift lever position signal and the current gear position;

[0065] Get the real-time speed and brake status of the vehicle;

[0066] Determine the shift strategy based on the current gear, target gear, real-time vehicle speed and brake status;

[0067] The shift strategy is executed based on the filtering time and the response time threshold of the N gear signal.

[0068] Specifically, when the vehicle is in the forward gear (D gear) or the reverse gear (R gear), in order to better control the gear shift and avoid misoperation causing the gear position of the vehicle to change and affect driving safety, it is necessary to divide it into different modes according to the vehicle speed, that is, it is divided into high-speed mode, low-speed mode and start-stop mode in order from high to low. This division method helps the vehicle to adopt appropriate shift strategies in different speed ranges. In this embodiment, the high-speed mode, low-speed mode and start-stop mode are respectively: high-speed mode: real-time vehicle speed>3km / h; low-speed mode: 0<real-time vehicle speed≤3km / h; start-stop mode: real-time vehicle speed=0km / h, where 3Km / h is the limited vehicle speed when entering the R gear designed by the gearbox or motor, and the vehicle speed is adjusted according to the matching of different gearboxes and motors of the whole vehicle. In order to improve the stability and reliability of the N gear signal, the N gear signal is specially processed, the filtering time of the N gear signal is extended and the response time threshold is set. The extension of the filtering time can effectively reduce the noise interference in the signal, making the N gear signal smoother and more accurate. At the same time, a response time threshold is set. This threshold is used to determine how long the system responds after receiving the N gear signal. If the response time threshold is exceeded, the corresponding N gear signal will not be responded. By extending the filtering time of the N gear signal and setting the response time threshold, the gear shifting action caused by signal fluctuation or misoperation can be avoided, thereby improving the vehicle's control stability and safety. The gear information of the vehicle is crucial for accurately controlling the operation of the vehicle. By monitoring and analyzing the gear signal, the current gear position of the vehicle can be determined. The gear signal is usually provided by the vehicle's gear sensor, which can detect the position of the gear lever in real time and convert it into an electrical signal to transmit to the vehicle's electronic control unit (ECU). Based on the received gear signal, the ECU accurately determines whether the vehicle is currently in the D gear, R gear, N gear or other gears, providing basic information for subsequent control decisions. On the basis of determining the current gear position of the vehicle, the target gear position is determined in combination with the gear lever position signal. The gear lever position signal reflects the driver's operating intention. For example, when the driver pushes the gear lever from the D gear to the N gear, the gear lever position signal will change accordingly. The ECU comprehensively determines the target gear that the driver wants to switch to based on the changes in the current gear position and the shift lever position signal. Real-time vehicle speed and brake status are important factors that affect the vehicle's shifting strategy. For example, the vehicle's speed sensor can be used to obtain the vehicle's driving speed in real time. The speed sensor is usually installed on the wheel or drive shaft and can accurately measure the vehicle's actual driving speed; the brake sensor can monitor the vehicle's brake status.The gear shifting strategy is determined according to the current gear position, target gear position, real-time vehicle speed and braking status; the gear shifting strategy is executed according to the filtering time and response time threshold of the N gear signal. The specific gear shifting strategy is determined by comprehensively considering multiple factors such as the vehicle's current gear position, target gear position, real-time vehicle speed and braking status, and the gear shifting strategy is executed according to the filtering time and response time threshold of the N gear signal. This can effectively reduce the false triggering and interference of the N gear signal, ensure the accuracy and reliability of the gear shifting operation, thereby improving the operating safety and stability of the vehicle control system, and reducing the safety hazards caused by misoperation or signal abnormalities.

[0069] In this embodiment, the shift strategy is shown in Table 1:

[0070]

[0071]

[0072] Table 1

[0073] As shown in Table 1, the filtering time of the N gear signal is extended from 50ms to 400ms, and the response time threshold is set to 2s; the filtering time of the R and D gear signals remains unchanged at 50ms.

[0074] Specifically, the original filtering time of the N gear signal is 50ms, which means that after receiving the electrical signal related to the N gear, the system will process the signal within 50ms to determine whether it is a real and valid N gear signal. Now the filtering time is extended to 400ms, which greatly increases the filtering time of the signal. This gives the system more time to distinguish the authenticity of the signal and effectively remove those interference signals with a shorter duration. For example, when the sensor near the shift lever generates a momentary error signal due to vibration during driving, the original 50ms filtering time may not be able to completely filter out this interference, while the 400ms filtering time is more likely to identify it as an interference signal, thereby avoiding misjudgment caused by such interference and making the N gear signal more reliable. At the same time, through the 400ms filtering time combined with the judgment conditions of braking and vehicle speed conditions, it can be judged whether the N gear signal is due to the driver's true intention or misoperation, resulting in a shift action, thereby improving the vehicle's handling stability and safety. Reasonable setting of the response time threshold can effectively prevent the system from being overly sensitive to the N gear signal. In actual driving, the driver may accidentally touch the shift lever briefly, causing it to be in the N gear position. If there is no limit on the response time threshold, the system may immediately perform the shift operation, which may bring safety hazards to driving. After setting the 2s response time threshold, the system will further confirm the authenticity of the signal and the rationality of the operation within these 2s. If it is found to be a misoperation within these 2s (such as the shift lever quickly returns to the original gear position), the system will not perform the shift operation, thereby improving the safety and stability of vehicle operation.

[0075] As shown in Table 1, when the current gear is D and the target gear is N, if the vehicle is currently in the start-stop mode / low-speed mode, and the shift lever is in the N gear for a time greater than or equal to the filtering time, then in response to the shift request, the gear signal is N, and the corresponding gear indicator lights up;

[0076] If the shift lever is in the N gear for a shorter time than the filtering time, the shift request will not be responded to, the gear position signal will be the D gear, and the corresponding gear position light will be on.

[0077] Specifically, when the current gear of the vehicle is D gear and the target gear is N gear, if the vehicle is currently in the start-stop mode / low-speed mode according to the real-time vehicle speed, and the shift lever is in the N gear for a time greater than or equal to the filtering time of 400ms, it indicates that the driver has been operating the shift lever in the N gear for a long enough time, and it is unlikely to be caused by a short-term misoperation or signal interference. Then it is determined that the driver does have the intention to switch the gear from D gear to N gear. At this time, in response to the shift request, the actual gear of the vehicle is switched to N gear, and the gear signal of the vehicle is updated to N gear. At the same time, the corresponding N gear position light on the vehicle dashboard is lit to intuitively show the driver that the current vehicle is in neutral; if the shift lever is in the N gear for a time less than the filtering time, it means that the shift lever is in the N gear for a short time, and it is possible that the driver accidentally touched the shift lever, or there are some short-term signal fluctuations. In order to avoid unnecessary shift operations due to such uncertain situations, the system will determine not to respond to the shift request. At this time, the actual gear position of the vehicle remains in D gear, the gear position signal of the vehicle is still D gear, and the corresponding D gear position light on the vehicle dashboard remains on, clearly indicating to the driver that the vehicle is still in forward gear driving mode. Among them, the time when the shift lever is in the N gear position is the length of time the shift lever is in gear. Through such a rigorous judgment logic and operation process, the driver's actual shifting intention can be accurately identified, and improper shifting caused by signal interference or misoperation can be effectively avoided, ensuring that the vehicle can operate safely and stably under various driving conditions, and the driver can understand the gear status of the vehicle in real time through the display of the gear position light.

[0078] As shown in Table 1, when the current gear position of the vehicle is D gear and the target gear position is N gear, if the vehicle is currently in high-speed mode and the gear shift lever is in N gear for a time greater than or equal to the filtering time but less than the response time threshold, the gear shift request is not responded to, the gear position signal is D gear, and the corresponding gear position light is on;

[0079] If the shift lever is in N gear for a shorter time than the filtering time, the gear shift request will not be responded to, the gear position signal will be D gear, the corresponding gear position light will be on, and the message "Vehicle speed is too high to shift gears" will be displayed;

[0080] If the shift lever is in the N gear for a period of time that is greater than or equal to the filtering time and greater than or equal to the response time threshold, the shift request is responded to, the gear position signal is the N gear, and the corresponding gear position light is on.

[0081] Specifically, when the shift lever is in the N gear for a certain period of time or more than the preset filtering time, it indicates that the shift lever has been in the N gear for a certain period of time and is not an instantaneous fluctuation. However, at this time, the shift lever is in the N gear for a period of time less than the response time threshold of 2s, that is, 400ms≤shift lever in gear time<2s. The function of the filtering time is to filter out short-term interference signals and ensure that the operation of the shift lever in the N gear is not caused by accidental mis-contact or instantaneous signal abnormality. The response time threshold is a time buffer given by the system when judging whether to perform a shift operation. In this case, although the shift lever has been in the N gear for a corresponding filtering time, it has not met the response time threshold, which is not enough to determine whether the driver really wants to switch to neutral gear when driving at high speed. In order to ensure driving safety, the system does not respond to the shift request, and the vehicle's gear signal is maintained in the D gear. At the same time, the corresponding D gear position light on the instrument panel remains on to intuitively show the driver that the vehicle is still in the forward gear driving mode. If the shift lever is in N gear for a shorter time than the filtering time, the N gear state is likely caused by the driver accidentally touching the shift lever briefly or by momentary signal interference. At this time, the system will not respond to the shift request, the vehicle's gear signal remains in D gear, and the corresponding D gear position light on the instrument panel continues to light up. In addition, in order to let the driver know why the gear cannot be shifted, the system will issue a prompt message "The speed is too high and the gear cannot be shifted." In this way, the driver can clearly know that the system did not perform the shift operation for safety reasons because the current vehicle speed is high and the shift lever is in N gear for too short a time. When the shift lever is in the N gear for a period of time that not only meets the filtering time but also meets the response time threshold, the system believes that the driver's operation of placing the shift lever in the N gear is continuous and stable, and it is very likely that the driver really wants to put the vehicle into the neutral state at the current high speed; after sufficient time has passed to judge the stability of the signal and the driver's intention, the system will respond to the shift request and update the vehicle's gear signal to the N gear; at the same time, the vehicle's actual gear will also be switched to neutral accordingly, and the power transmission will be cut off; at this time, the corresponding N gear light on the instrument panel lights up, clearly showing the driver that the vehicle is in neutral.

[0082] As shown in Table 1, when the current gear position of the vehicle is D gear and the target gear position is R gear, if the vehicle is currently in the start-stop mode / low-speed mode, the gear shift lever is in the R gear for a time period greater than or equal to the filter time of the R gear, and no brake signal is received, the gear shift request is not responded to, the gear position signal is D gear, the corresponding gear position light is on, and a prompt "press the brake pedal to shift gears" is given;

[0083] If the vehicle is currently in the start-stop mode / low-speed mode, the shift lever is in the R gear for a time that is greater than or equal to the R gear filter time, and a brake signal is received, then in response to the shift request, the gear position signal is the R gear, and the corresponding gear position light is on;

[0084] If the vehicle is currently in high-speed mode, the shift lever is in R gear for a period of time that is greater than or equal to the filtering time of R gear, and a brake signal is received, the gear shift request is responded to, the gear position signal is N gear, the corresponding gear position light is on, and a prompt "Vehicle speed is too high and cannot shift gears" is displayed.

[0085] Specifically, when the vehicle is currently in start-stop mode or low-speed mode, it means that the vehicle is traveling at a relatively low speed. The start-stop mode is usually suitable for scenarios where the vehicle starts and stops frequently, such as in congested urban traffic conditions. When the vehicle stops, the engine may automatically shut down to save fuel; the low-speed mode is the state in which the vehicle is traveling at a lower speed. At this time, if the shift lever is in the R gear for a time that is greater than or equal to the preset R gear filter time of 50ms, it means that the shift lever has been in the R gear for a long enough time and it is not a momentary misoperation. The filter time is set to filter out short-term abnormal signals caused by vehicle vibration, electromagnetic interference and other factors, to ensure that the R gear signal received by the system is stable and reliable; however, the system also detects that no brake signal is received. In vehicle design, switching from forward gear to reverse gear is a critical operation. To ensure safety, the driver is usually required to step on the brake pedal when performing this operation. This is because if the vehicle switches directly from forward gear to reverse gear without braking, it will cause a huge impact on transmission components such as the gearbox, which may cause component damage and even cause safety accidents. Therefore, in this case, the system will not respond to the gear shift request, and the vehicle's gear signal will remain in D gear. The corresponding D gear position light on the instrument panel will continue to light up, and the system will inform the driver through the prompt message "Press the brake pedal to shift gears" that he needs to step on the brake pedal. The system detects that the driver has stepped on the brake pedal and the vehicle is in a braking state. In this case, it is relatively safe to switch the vehicle from forward gear to reverse gear because braking can reduce the speed of the vehicle and reduce the impact on the transmission components. Therefore, the system will respond to the gear shift request and update the gear position signal of the vehicle to R gear. At the same time, the corresponding R gear position light on the instrument panel will light up, indicating to the driver that the vehicle has successfully switched to reverse gear. When the vehicle is in high-speed mode, the vehicle travels at a higher speed.If the shift lever is in R gear for a time that is greater than or equal to the filtering time of R gear, it means that the shift lever is in R gear stably and the driver may intend to switch to reverse gear. Although the system has received a brake signal, indicating that the driver has taken braking measures, the vehicle is currently in a high-speed driving state, and the vehicle speed is still high even if the brakes are stepped on. Switching directly from forward gear to reverse gear at high speed will cause serious damage to the vehicle's transmission system and even endanger driving safety. Therefore, in order to protect the safety of the vehicle and personnel, the system will not switch the gear to R gear, but will respond to the shift request to set the gear signal to N gear (neutral), and the corresponding N gear position light on the instrument panel will light up. At the same time, the system will inform the driver through the prompt message "The vehicle speed is too high and cannot shift gears" that the switching operation from D gear to R gear cannot be performed due to the current high vehicle speed.

[0086] As shown in Table 1, when the current gear position of the vehicle is R gear and the target gear position is N gear, if the vehicle is currently in the start-stop mode and the gear shift lever is in N gear for a time greater than or equal to the filtering time of N gear, then in response to the gear shift request, the gear position signal is N gear, and the corresponding gear position light is on;

[0087] When the vehicle's current gear is R and the target gear is D, if the vehicle is currently in low-speed mode and the shift lever is in D for a time greater than or equal to the D filter time, then in response to the shift request, the gear signal is D and the corresponding gear indicator lights up;

[0088] When the vehicle's current gear is R and the target gear is D, if the vehicle is currently in high-speed mode and the shift lever is in D for a time that is greater than or equal to the D filter time, the gear shift request will not be responded to, the gear signal will be N, the corresponding gear light will light up, and a prompt will be given that "the vehicle speed is too high and cannot shift gears."

[0089] Specifically, when the vehicle is currently in the reverse gear (R gear) and the target is set to N gear (neutral), if it is judged that the vehicle is currently in start-stop mode based on the vehicle speed, once it is confirmed that the shift lever is in the N gear for a time that is greater than or equal to the filtering time of the N gear of 400ms, it is determined that the driver has a clear and stable intention to switch the gear from R gear to N gear. At this time, the gear shift request is responded to, and the actual gear position of the vehicle is switched from R gear to N gear. At the same time, the ECU will update the vehicle's gear signal to N gear and light up the corresponding N gear position light on the instrument panel to intuitively inform the driver that the vehicle has successfully switched to neutral gear. The vehicle is in R gear for reversing and is in low speed mode. When it is detected that the shift lever has moved to D gear, the D gear signal is immediately filtered. When the time when the shift lever is in D gear meets the pre-set D gear filtering time, it is determined that the driver has a stable intention to switch from R gear to D gear, and the actual gear position of the vehicle is switched from R gear to D gear. At the same time, the vehicle's gear signal is updated to D gear, and the corresponding D gear position light on the instrument panel is lit, so that the driver knows clearly that the vehicle has switched to forward gear and can drive forward. The vehicle is in the R gear and in the high-speed mode. After detecting that the shift lever has moved to the D gear position, the D gear signal is filtered to confirm the validity of the signal. When it is determined that the shift lever is in the D gear for a time period that is greater than or equal to the filtering time of the D gear, it indicates that the driver has a clear intention to switch from the R gear to the D gear. However, since the vehicle is in the high-speed mode, if the gear is directly switched from the R gear to the D gear, the huge speed difference will cause serious impact on the transmission components such as the gearbox and the drive shaft, which may cause mechanical damage and even endanger driving safety. Therefore, the request to switch the gear from the R gear to the D gear will not be responded to at this time. In order to protect the safety of the vehicle and personnel, the gearbox is controlled to put the vehicle into the neutral state, the gear signal is set to the N gear, and the corresponding N gear position light on the instrument panel is lit. At the same time, a prompt message "The vehicle speed is too high and the gear cannot be changed" is displayed on the instrument panel display screen to remind the driver that the current vehicle speed is too high and the switching operation from the R gear to the D gear cannot be performed. The vehicle speed must be reduced before trying to change gears.

[0090] This embodiment divides the vehicle speed mode, extends the N gear signal filtering time and sets the response time threshold, determines and executes the gear shifting strategy according to the gear position signal, the shift lever position signal, the real-time vehicle speed and the brake status, etc., which can effectively reduce improper gear shifting caused by misoperation, improve the safety and stability of vehicle driving, reduce the potential risks caused by incorrect gear shifting during driving, and ensure the safety of drivers and passengers.

[0091] like Figure 2 As shown, the method of determining the target gear position based on the gear shift lever position signal and the current gear position of this embodiment includes:

[0092] The target gear is R: the current gear is any gear, and the shift lever position signal is a forward 2-step signal; or the current gear is R or N, and the shift lever position signal is a forward 1-step signal;

[0093] The target gear position is D: the current gear position is R or N or P or D, and the shift lever position signal is a backward 2-step signal; or the current gear position is D or N, and the shift lever position signal is a backward 1-step signal;

[0094] The target gear position is N: the current gear position is D, and the shift lever position signal is a 1-step forward signal; the current gear position is P, and the shift lever position signal is a 1-step forward signal or a 1-step backward signal; or the current gear position is R, and the shift lever position signal is a 1-step backward signal.

[0095] Example 2

[0096] This embodiment provides an anti-mistouch shift control device for an electronic shift system without an unlocking button, comprising:

[0097] A division module is used to divide the vehicle speed into a high speed mode, a low speed mode and a start-stop mode according to the vehicle speed from high to low when the vehicle is driving in the D gear or the R gear;

[0098] A setting module, used to extend the filtering time of the N-level signal and set the response time threshold;

[0099] A first determination module, configured to determine a current gear position of the vehicle based on the gear position signal;

[0100] a second determination module, configured to determine a target gear position based on the shift lever position signal and the current gear position;

[0101] An acquisition module is used to obtain the real-time speed and brake status of the vehicle;

[0102] A third determination module is used to determine the shift strategy based on the current gear position, the target gear position, the real-time vehicle speed and the brake status;

[0103] The execution module is used to execute the shift strategy based on the filtering time and response time threshold of the N gear signal.

[0104] Example 3

[0105] This embodiment provides a vehicle, which includes the anti-mistouch shift control device of the electronic shift system without unlocking button as described in Example 2.

[0106] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for preventing accidental shifting of an electronic shifting system without an unlocking button, characterized in that: include: When the vehicle is running in D / R gear, the vehicle speed is divided into high speed mode, low speed mode and start-stop mode according to the vehicle speed from high to low; Extend the filtering time of the N-level signal and set the response time threshold; determining a current gear position of the vehicle based on the gear position signal; determining a target gear position based on the shift lever position signal and the current gear position; Obtaining the real-time speed and brake status of the vehicle; Determining a gear shift strategy based on the current gear, the target gear, the real-time vehicle speed and the brake status; The shift strategy is executed based on the filtering time and the response time threshold of the N gear signal.

2. The anti-mistouch shift control method of the electronic shift system without unlocking button according to claim 1, characterized in that: The high speed mode, low speed mode and start-stop mode are respectively: High-speed mode: real-time vehicle speed> 3km / h; Low speed mode: 0<real-time vehicle speed≤3km / h; Start-stop mode: real-time vehicle speed = 0km / h.

3. The anti-mistouch shift control method of the electronic shift system without unlocking button according to claim 2, characterized in that: The shift strategy includes: When the current gear is D gear and the target gear is N gear, if the vehicle is currently in the start-stop mode / low-speed mode and the gear shift lever is in the N gear for a time period greater than or equal to the filtering time, in response to the gear shift request, the gear signal is N gear; If the shift lever is in the N gear for a time period that is shorter than the filtering time, the shift request is not responded to, and the gear position signal is the D gear.

4. The anti-mistouch shift control method of the electronic shift system without unlocking button according to claim 3, characterized in that: The shift strategy includes: When the current gear is D gear and the target gear is N gear, if the vehicle is currently in high-speed mode and the gear-in time of the shift lever in N gear is greater than or equal to the filtering time but less than the response time threshold, the gear shift request is not responded to and the gear signal is D gear; If the shift lever is in gear N for a time period shorter than the filtering time, the shift request is not responded to, the gear position signal is D gear, and a prompt "vehicle speed is too high to shift gears" is given; If the shift lever is in the N gear for a period of time that is greater than or equal to the filtering time and greater than or equal to the response time threshold, then in response to the shift request, the gear position signal is the N gear.

5. The anti-mistouch shift control method of the electronic shift system without unlocking button according to claim 2, characterized in that: The shift strategy includes: When the current gear is D and the target gear is R, if the vehicle is currently in the start-stop mode / low-speed mode, the gear shift lever is in the R gear for a time period greater than or equal to the filter time of the R gear, and the brake signal is not received, the gear shift request is not responded to, the gear signal is D, and a prompt "press the brake pedal to shift gears" is given; If the vehicle is currently in the start-stop mode / low-speed mode, the shift lever is in the R gear for a time period greater than or equal to the filtering time of the R gear, and the brake signal is received, then in response to the shift request, the gear position signal is the R gear; If the vehicle is currently in high-speed mode, the shift lever is in R gear for a time that is greater than or equal to the filtering time of R gear, and the brake signal is received, then in response to the shift request, the gear position signal is N gear, and a prompt "Vehicle speed is too high to shift gears" is given.

6. The anti-mistouch shift control method of the electronic shift system without unlocking button according to claim 2, characterized in that: The shift strategy includes: When the current gear is R and the target gear is N, if the vehicle is currently in the start-stop mode and the shift lever is in N for a time greater than or equal to the filtering time of N, then in response to the shift request, the gear signal is N; When the current gear is R and the target gear is D, if the vehicle is currently in low speed mode and the gear shift lever is in D for a time period greater than or equal to the filtering time of D, then in response to a gear shift request, the gear signal is D; When the current gear is R and the target gear is D, if the vehicle is currently in high-speed mode and the shift lever is in D for a time that is greater than or equal to the filtering time of D, the shift request will not be responded to, the gear signal will be N, and a prompt will be given that "the vehicle speed is too high and cannot shift gears".

7. The anti-mistouch shift control method of the electronic shift system without unlocking button according to claim 1, characterized in that: The filtering time of the N-level signal is: 400ms; The response time threshold is: 2s。 8. The anti-mistouch shift control method of the electronic shift system without unlocking button according to claim 1, characterized in that: The method for determining a target gear position based on a gear shift lever position signal and the current gear position includes: The target gear is R: the current gear is any gear, and the shift lever position signal is a forward 2-step signal; or the current gear is R or N, and the shift lever position signal is a forward 1-step signal; The target gear position is D: the current gear position is R or N or P or D, and the shift lever position signal is a backward 2-step signal; or the current gear position is D or N, and the shift lever position signal is a backward 1-step signal; The target gear position is N: the current gear position is D, and the shift lever position signal is a 1-step forward signal; the current gear position is P, and the shift lever position signal is a 1-step forward signal or a 1-step backward signal; or the current gear position is R, and the shift lever position signal is a 1-step backward signal.

9. An anti-accidental-touch shift control device for an electronic shift system without an unlocking button, characterized in that: include: A division module is used to divide the vehicle speed into a high speed mode, a low speed mode and a start-stop mode according to the vehicle speed from high to low when the vehicle is driving in the D gear or the R gear; A setting module, used to extend the filtering time of the N-level signal and set the response time threshold; A first determination module, configured to determine a current gear position of the vehicle based on the gear position signal; a second determination module, configured to determine a target gear position based on a shift lever position signal and the current gear position; An acquisition module, used to acquire the real-time speed and braking status of the vehicle; A third determination module, configured to determine a shift strategy based on the current gear position, the target gear position, the real-time vehicle speed and the braking state; An execution module is used to execute the shift strategy based on the filtering time and response time threshold of the N gear signal.

10. A vehicle, characterized in that: The vehicle includes the anti-mistouch shift control device of the unlock-button-free electronic shift system according to claim 9.

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