Deceleration system and vehicle

Abstract

The application discloses a deceleration system and a vehicle, and belongs to the technical field of vehicles. The deceleration system comprises a light sensor, a vehicle controller and a motor, the vehicle controller is respectively connected with the light sensor and the motor in signal connection; the light sensor is used for monitoring the light intensity outside the vehicle; when the light intensity is greater than a light intensity threshold value, a deceleration signal is generated, and the deceleration signal is sent to the vehicle controller; the vehicle controller is used for controlling the motor to output a target negative torque based on the deceleration signal. By adopting the deceleration system provided in the application, the safety of the driving process can be ensured when the driver is irradiated by strong light.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a deceleration system and a vehicle. BACKGROUND

[0002] Due to the biological characteristics of human beings, the reaction speed of human beings at night and the processing capacity when facing sudden problems are often weaker than during the day, so when driving at night, if strong light suddenly shines on the outside of the vehicle, it is easy to cause traffic accidents. For example, when the driver is exposed to strong light, the brain is easy to have a short blank period due to strong light stimulation, which leads to the inability to quickly respond to external stimulation, and thus dangerous driving or traffic accidents are easy to occur.

[0003] In related technologies, a sun visor that can be folded downward is usually arranged on the roof panel. When driving at night, the driver can block part of the light from entering the eyes by folding down the sun visor. However, sometimes due to problems such as improper adjustment of the seat, unsuitable angle of the sun visor, or deviation of the sitting height, the sun visor will block part of the driver's view, thus some dangerous driving or traffic accidents may occur. SUMMARY

[0004] Therefore, the present application provides a deceleration system and a vehicle, which can ensure the safety of driving when the driver is exposed to strong light.

[0005] In one aspect, the present application provides a deceleration system, which comprises a light sensor, a vehicle controller and a motor, the vehicle controller is respectively signal connected with the light sensor and the motor;

[0006] The light sensor is used for monitoring the light intensity outside the vehicle, and when the light intensity is greater than a light intensity threshold value, a deceleration signal is generated and sent to the vehicle controller;

[0007] The vehicle controller is used for controlling the motor to output a target negative torque based on the deceleration signal.

[0008] Optionally, the deceleration system further comprises an accelerator pedal sensor, the accelerator pedal sensor is signal connected with the vehicle controller, and is used for monitoring the opening degree of the accelerator pedal to obtain a pedal signal;

[0009] The vehicle controller is further used for acquiring the pedal signal from the accelerator pedal sensor in response to receiving the deceleration signal, and determining the current opening degree of the accelerator pedal based on the pedal signal;

[0010] The vehicle controller is further used for controlling the motor to output the target negative torque in response to the current opening degree being less than a pedal opening degree threshold value.

[0011] Optionally, the vehicle controller is further configured to:

[0012] acquire the pedal signal;

[0013] in response to the current opening degree being greater than the pedal opening degree threshold, control the motor to stop outputting the target negative torque.

[0014] Optionally, the deceleration system further comprises a vehicle speed monitor, which is in signal connection with the vehicle controller and configured to monitor a current speed of the vehicle to obtain a vehicle speed signal.

[0015] The vehicle controller is further configured to, in response to the current opening degree being less than the pedal opening degree threshold, acquire the vehicle speed signal from the vehicle speed monitor to determine the current speed of the vehicle.

[0016] The vehicle controller is further configured to, based on the current speed being greater than a vehicle speed threshold, control the motor to output a target negative torque.

[0017] Optionally, when the current speed is greater than the vehicle speed threshold, the vehicle controller is further configured to:

[0018] determine a first energy recovery power corresponding to the current speed based on the current speed and a preset energy recovery power table;

[0019] determine a first torque based on the first energy recovery power;

[0020] determine a second torque based on a maximum allowable recovery power corresponding to a current battery;

[0021] acquire a third torque of the motor, wherein the third torque is a maximum torque allowed to be output by the motor;

[0022] determine the target negative torque based on the first torque, the second torque and the third torque.

[0023] Optionally, the first energy recovery power and the current speed have a positive linear relationship.

[0024] Optionally, the determination of the target negative torque based on the first torque, the second torque and the third torque comprises:

[0025] determining the minimum torque among the first torque, the second torque and the third torque as the target negative torque.

[0026] Optionally, the vehicle controller is further configured to, when the current speed is greater than the vehicle speed threshold, generate a first alarm instruction, wherein the first alarm instruction is configured to instruct to light up a brake light of the vehicle.

[0027] Optionally, the vehicle controller is further configured to generate a second alarm instruction when the current vehicle speed is greater than a vehicle speed threshold, wherein the second alarm instruction is used to instruct the dangerous alarm light of the vehicle to be turned on.

[0028] In another aspect, the embodiments of the present application also provide a vehicle, which comprises the deceleration system described in any of the above.

[0029] The deceleration system provided by the present application comprises a light sensor, a vehicle controller and a motor. The vehicle controller is signal connected with the light sensor and the motor, so that signal transmission can be realized between the vehicle controller and the light sensor and between the vehicle controller and the motor. The light sensor is used to detect the light intensity outside the vehicle, and when the light intensity is greater than a light intensity threshold, a deceleration signal is generated and sent to the vehicle controller. The vehicle controller controls the motor to output a target negative torque based on the deceleration signal. Since the vehicle can control the motor to output a negative torque based on the external light intensity of the vehicle to realize the deceleration of the vehicle, it can avoid the driver from failing to decelerate in time when suffering from strong light irradiation, thereby causing dangerous consequences. That is, the deceleration system can ensure the safety of the driving process when the driver is exposed to strong light irradiation. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 is a schematic diagram of a deceleration system provided by an embodiment of the present application;

[0032] Figure 2 is a schematic diagram of another deceleration system provided by an embodiment of the present application.

[0033] Reference signs:

[0034] 100, light sensor;

[0035] 200, vehicle controller;

[0036] 300, motor;

[0037] 400, accelerator pedal sensor;

[0038] 500, vehicle speed monitor;

[0039] 600, brake light;

[0040] 700, hazard warning light;

[0041] 800, motor controller;

[0042] 900, body controller;

[0043] 1000, distance sensor;

[0044] 1100, slope sensor.

[0045] The specific embodiments of the present application have been shown through the above-described drawings, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application.

[0047] Unless otherwise defined, all the technical terms used in the embodiments of the present application have the same meanings as commonly understood by those skilled in the art.

[0048] In order to make the technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in further detail below in combination with the drawings.

[0049] As shown in Figure 1 The embodiments of the present application provide a deceleration system, which comprises a light sensor 100, a vehicle controller 200 and a motor 300. The vehicle controller 200 is signal connected with the light sensor 100 and the motor 300 respectively. It should be noted that the signal connection in the embodiments of the present application means that the vehicle controller 200 and the motor 300 are connected through hard wire or wireless, so as to transmit or receive signals to each other.

[0050] The light sensor 100 is used for monitoring the light intensity outside the vehicle. When the light intensity is greater than a light intensity threshold value, a deceleration signal is generated and sent to the vehicle controller 200. It should be noted that the light sensor 100 is generally installed in the area near the driver. In some embodiments, the light sensor 100 is installed on the instrument panel and located in front of the driver. Thus, the light intensity perceived by the driver during driving the vehicle can be determined more accurately.

[0051] The vehicle controller 200 is configured to control the motor 300 to output a target negative torque based on the deceleration signal. It should be noted that when the motor 300 outputs the target negative torque, the vehicle is in a state of gradually decelerating.

[0052] In the deceleration system provided in the present application, the vehicle controller 200 and the light sensor 100, and the vehicle controller 200 and the motor 300 can realize signal transmission. Since the vehicle can control the motor 300 to output a target negative torque based on the external light intensity of the vehicle to realize the deceleration of the vehicle, it can avoid the driver from failing to decelerate in time when suffering from strong light irradiation, thereby causing dangerous consequences. That is, the deceleration system can ensure the safety of the driving process when the driver is irradiated by strong light.

[0053] The details and effects of the deceleration system provided in the embodiments of the present application will be described in more detail. Figure 1 and the accompanying drawings Figure 2 The details and effects of the deceleration system provided in the embodiments of the present application will be described in more detail.

[0054] As shown in Figure 1 In some embodiments, the vehicle controller 200 starts to receive the deceleration signal sent by the light sensor 100 in response to the automatic deceleration function on the central control screen being in an open state. In some embodiments, the vehicle controller 200 does not receive the deceleration signal sent by the light sensor 100 in response to the automatic deceleration function on the central control screen being in a closed state. It should be noted that the central control screen displays an automatic deceleration button corresponding to the automatic deceleration function, and the central control screen opens the automatic deceleration function in response to the triggering operation of the automatic deceleration button by the user, and sends the state of the automatic deceleration function to the vehicle controller 200. That is, whether to open the automatic deceleration function can be determined based on the needs of the user, thereby improving the user experience. It should be noted that when the vehicle is powered off and then powered on again, the on-off state of the automatic deceleration function of the last time is still maintained. For example, the user selects to open the automatic deceleration function during the first driving process of the vehicle. When the user uses the vehicle next time, the on-off state of the automatic deceleration function is consistent with the on-off state of the last time, that is, the automatic deceleration function of the second time is still in an open state, and the central control screen still sends the open state of the automatic deceleration function to the vehicle controller 200. This avoids the user from repeatedly operating the same step of opening the automatic deceleration function, that is, simplifies the operation of the user, and improves the user experience.

[0055] As shown in Figure 1 In some embodiments, the deceleration system further comprises an accelerator pedal sensor 400, which is in signal connection with the vehicle controller 200 and is configured to monitor the opening degree of the accelerator pedal to obtain a pedal signal.

[0056] The vehicle controller 200 is further configured to, in response to receiving the deceleration signal, acquire a pedal signal from the accelerator pedal sensor 400, and determine a current opening degree of the accelerator pedal based on the pedal signal.

[0057] The vehicle controller 200 is further configured to, in response to the current opening degree being less than a pedal opening degree threshold, control the motor 300 to output a target negative torque.

[0058] It should be noted that, since the current opening degree of the current accelerator pedal is taken as a determination condition for whether to perform automatic deceleration, the timing of automatic deceleration can be more accurately determined based on the current state of the vehicle. Generally, the driver will step on the accelerator pedal when driving normally. In some cases, although there is strong light around the vehicle, it does not affect the driving behavior of the driver, and the driver will still step on the accelerator pedal and continue to drive normally. That is, when the current opening degree of the accelerator pedal is greater than the pedal opening degree threshold, the vehicle controller 200 does not control the motor 300 to output a target negative torque, that is, the process of automatic deceleration does not occur at this time. If the current opening degree is less than the pedal opening degree threshold, it means that the driver has released the accelerator pedal, which means that the strong light in front of the vehicle has affected the normal driving process of the driver, causing the driver to release the accelerator pedal. At this time, the vehicle controller 200 controls the motor 300 to output a target negative torque based on the current opening degree of the accelerator pedal, which can achieve automatic deceleration of the vehicle. Thus, when the driver cannot react quickly due to the stimulation of strong light, the vehicle speed can be reduced in time to ensure the safety of the driver, the vehicle driven by the driver, and the surrounding vehicles. That is, the safety of the driving process can be ensured when the driver is exposed to strong light. It should be noted that the pedal opening degree threshold is a value close to 0, and when the current opening degree of the accelerator pedal is less than the pedal opening degree threshold, it means that the driver's foot is not on the accelerator pedal, that is, the pedal is completely released; or it means that the driver's foot is on the accelerator pedal, but it is not stepped on. In some embodiments, the vehicle controller 200 controls the motor 300 to output a target negative torque in response to the current opening degree being less than zero. It can be understood that when the current opening degree of the accelerator pedal is less than zero, the driver is in a state of completely releasing the accelerator pedal.

[0059] As Figure 1As shown, in some embodiments, after controlling the motor 300 to output the target negative torque, the vehicle controller 200 is also used to: acquire a pedal signal. In response to the current opening degree being greater than a pedal opening threshold, the motor 300 is controlled to stop outputting the target negative torque. In some embodiments, the accelerator pedal sensor 400 is used to send the accelerator pedal signal to the vehicle controller 200 in real time. It should be noted that when the current opening degree of the accelerator pedal is greater than the pedal opening threshold, it indicates that the driver has pressed the accelerator pedal. During the process of the vehicle controller 200 controlling the motor 300 to output the target negative torque to achieve automatic deceleration, if the accelerator pedal is pressed, it is determined that the driver currently believes they are no longer affected by the light and can continue driving normally. At this time, after the vehicle controller 200 controls the motor 300 to stop outputting the target negative torque, it can ensure that the vehicle continues to drive normally under the driver's control. That is to say, the system can both ensure timely deceleration to avoid dangerous driving when the driver is affected by strong light, and also restore the vehicle to its normal driving state in a timely manner according to the driver's driving behavior when the driver is no longer affected by the light.

[0060] like Figure 1 As shown, in some embodiments, the deceleration system further includes a vehicle speed monitor 500, which is signal-connected to the vehicle controller 200 and used to monitor the current speed of the vehicle to obtain a vehicle speed signal.

[0061] The vehicle controller 200 is also used to obtain a vehicle speed signal from the vehicle speed monitor 500 and determine the current vehicle speed when the current opening degree is less than the pedal opening degree threshold.

[0062] The vehicle controller 200 is also used to control the motor 300 to output a target negative torque when the current vehicle speed exceeds a speed threshold. Generally, the speed threshold can be 30 km / h, but it can also be 25 km / h or 20 km / h, and can be adjusted according to the driver's habits. It should be noted that the speed monitor 500 can be a device installed in the vehicle's braking system.

[0063] It should be noted that when the current vehicle speed exceeds a speed threshold, it is considered too fast, and timely automatic deceleration ensures vehicle safety. If the current speed is below the speed threshold, it is considered too slow, and the driver is in a relatively safe state even without automatic deceleration. Therefore, the system can take different braking measures for different current speeds, increasing the flexibility of controlling the vehicle's driving status.

[0064] It can be understood that, since the current vehicle speed, the current opening degree of the accelerator pedal, and the light intensity monitored by the light sensor 100 are collectively used as the determination condition for whether to perform automatic deceleration, the timing of automatic deceleration can be more accurately determined based on the current state of the vehicle, so as to avoid interfering with the normal driving process of the driver while ensuring the safe driving of the vehicle.

[0065] In some embodiments, when the current vehicle speed is greater than the vehicle speed threshold, the vehicle control unit 200 is further configured to:

[0066] Based on the current vehicle speed and the preset energy recovery power table, a first energy recovery power corresponding to the current vehicle speed is determined.

[0067] Based on the first energy recovery power, a first torque is determined.

[0068] Based on the maximum allowed recovery power corresponding to the current battery, a second torque is determined.

[0069] A third torque of the motor 300 is obtained, wherein the third torque is the maximum torque allowed to be output by the motor 300.

[0070] Based on the first torque, the second torque, and the third torque, a target negative torque is determined.

[0071] In some embodiments, based on the first torque, the second torque, and the third torque, determining the target negative torque includes determining the minimum torque among the first torque, the second torque, and the third torque as the target negative torque.

[0072] It should be noted that the maximum allowed recovery power corresponding to the current battery can be obtained by the battery management system and sent to the vehicle control unit 200. There is a correlation between the energy recovery power and the torque. Generally, the energy recovery power table is pre-stored in the vehicle control unit 200, which includes different vehicle speeds and energy recovery powers corresponding to different vehicle speeds. Generally, the higher the vehicle speed, the greater the energy recovery power. The energy recovery power table is the correspondence between the vehicle speed and the energy recovery power set by the technician in the development stage. For example, the energy recovery power table can be as shown in the following table:

[0073] Current vehicle speed (km / h) 30 40 …… 90 100 110 120 Energy recovery power (kW) 0 [P1] …… [P6] [P7] [P8] [P9]

[0074] It should be noted that, since the minimum value among the first torque, the second torque, and the third torque is used as the target negative torque, the target negative torque is determined by comprehensively considering the current vehicle speed state, the current battery state, and the performance of the motor 300 itself. Thus, not only the automatic deceleration of the vehicle is realized, but also the damage to the battery or the motor 300 is avoided.

[0075] In some embodiments, the first energy recovery power and the current vehicle speed have a positive linear relationship.

[0076] As shown in Figure 2 some embodiments, the deceleration system further comprises a motor controller 800, which is in signal connection with the vehicle controller 200 and the motor 300 respectively. The vehicle controller 200 is further configured to send a deceleration request to the motor controller 800 based on the target negative torque, and the deceleration request is used to instruct the motor controller 800 to control the motor 300 to output the target negative torque.

[0077] In some embodiments, the motor controller 800 is further configured to send the third torque of the motor 300 to the vehicle controller 200.

[0078] As shown in Figure 1 some embodiments, the vehicle controller 200 is further configured to generate a first alarm instruction when the current vehicle speed is greater than the vehicle speed threshold, and the first alarm instruction is used to instruct the brake light 600 of the vehicle to be turned on.

[0079] It should be noted that the brake light 600 is also called the brake light. When the vehicle speed is high, the brake light 600 of the vehicle is turned on, which can timely remind the driver of the rear vehicle that the vehicle is decelerating, so that the driver of the rear vehicle can also take measures to avoid or decelerate in time, prevent unnecessary safety accidents, and ensure the safety of the driver and the surrounding vehicles and drivers. That is, the deceleration system provided in the embodiments of the present application can not only automatically decelerate the current vehicle to avoid dangerous driving behavior, thereby ensuring the safety of the current vehicle, but also can ensure the safety of the surrounding vehicles, thereby avoiding traffic accidents.

[0080] As shown in Figure 1 some embodiments, the vehicle controller 200 is further configured to generate a second alarm instruction when the current vehicle speed is greater than the vehicle speed threshold, and the second alarm instruction is used to instruct the hazard warning light 700 of the vehicle to be turned on.

[0081] It should be noted that when the vehicle speed is high, the hazard warning light 700 of the vehicle can timely remind the driver of the rear vehicle that the vehicle is in a dangerous state, so as to play a warning role on the driver of the rear vehicle, so that the driver of the rear vehicle can take measures to decelerate or avoid, prevent unnecessary safety accidents, and ensure the safety of the driver and the surrounding vehicles and drivers. That is, the deceleration system provided in the embodiments of the present application can not only automatically decelerate the current vehicle to avoid dangerous driving behavior, thereby ensuring the safety of the current vehicle, but also can ensure the safety of the surrounding vehicles, thereby avoiding traffic accidents.

[0082] As shown in Figure 2As shown, in some embodiments, the deceleration system further includes a body controller 900, which is signal-connected to the vehicle controller 200. The vehicle controller 200 is also used to send a first alarm command and a second alarm command to the body controller 900. Based on the first alarm command and the second alarm command, the body controller 900 illuminates the brake light 600 and the hazard warning light 700, respectively.

[0083] It should be noted that the brake light 600 and the hazard warning light 700 can be illuminated simultaneously, or only one of the brake light 600 and the hazard warning light 700 can be illuminated. Both can serve as a warning to drivers of vehicles behind.

[0084] like Figure 2 As shown, in some embodiments, the deceleration system further includes a distance sensor 1000, which is connected to the vehicle controller 200 via a signal. The distance sensor 1000 is installed at the rear of the vehicle and is used to monitor the distance between the current vehicle and the vehicle behind it to obtain a distance signal.

[0085] After determining the target negative torque, the vehicle controller 200 is also used to acquire a distance signal from the distance sensor 1000 and determine the distance between the current vehicle and the vehicle behind it based on the distance signal.

[0086] The vehicle controller 200 is also used to control the motor 300 to output a target negative torque in response to the distance between the current vehicle and the vehicle behind it being greater than a distance threshold.

[0087] It is understandable that if the distance between the current vehicle and the vehicle behind is too small, a rear-end collision is likely to occur if the current vehicle automatically decelerates. Since the deceleration system provided in this application takes the distance between the current vehicle and the vehicle behind as a factor in whether to perform automatic deceleration, and only performs automatic deceleration when the distance between the two vehicles is greater than a distance threshold, this deceleration system can automatically decelerate while ensuring the safety of both vehicles.

[0088] In some embodiments, the distance sensor 1000 is used to monitor the distance between the current vehicle and the vehicle behind in real time, obtain a distance signal, and send the distance signal to the vehicle controller 200 in real time.

[0089] The vehicle controller 200 is also used to determine the relative speed between the current vehicle and the vehicle behind it from the first time moment to the second time moment based on the distance signal at the first time moment and the distance signal at the second time moment. The vehicle controller 200 is also used to determine the safety time based on the distance and relative speed between the current vehicle and the vehicle behind it at the second time moment.

[0090] The vehicle controller 200 is further configured to control the current vehicle to reduce to a target speed within a safety time, wherein the distance between the current vehicle and the rear vehicle is greater than zero when the current vehicle reduces to the target speed within the safety time. Thus, the current vehicle can be automatically decelerated, and the rear-end collision between the current vehicle and the rear vehicle can be avoided.

[0091] As shown in FIG. 1, in some embodiments, the deceleration system further comprises a slope sensor 1100, which is in signal connection with the vehicle controller 200, and is configured to monitor the current slope of the ground where the current vehicle is located, and obtain a slope signal. Figure 2

[0092] After determining the target negative torque, the vehicle controller 200 is further configured to obtain the slope signal from the slope sensor 1100, and determine the current slope and the uphill or downhill state of the current vehicle based on the slope signal.

[0093] The vehicle controller 200 is further configured to determine the target speed corresponding to the current slope based on the current slope, and control the motor 300 to output the target negative torque and keep unchanged when the vehicle speed reduces to the target speed. In some embodiments, if the vehicle is in the uphill state, the current slope is positively correlated with the target speed. If the vehicle is in the downhill state, the current slope is negatively correlated with the target speed. That is, when the vehicle is uphill, the greater the current slope, the greater the target speed. When the vehicle is downhill, the greater the current slope, the smaller the target speed. Since the deceleration system determines the final target speed of the automatic deceleration process based on the current slope, it can not only achieve automatic deceleration, but also prevent the vehicle from sliding and causing other safety accidents, thereby further ensuring the safety of driving.

[0094] By using the deceleration system provided in the present application, the automatic deceleration can be performed in time when the driver is irradiated by strong light, so as to ensure the safety of the vehicle driving process. Different braking measures can be performed according to different current opening degrees of the accelerator pedal, current vehicle speed, distance between the front and rear vehicles, and current slope of the vehicle, so as to more accurately control the driving state of the vehicle. At the same time, since the vehicle controller 200 can light the brake light 600 and the hazard warning light 700 during the automatic deceleration process, the driver of the rear vehicle can be warned to take evasive or deceleration measures as soon as possible, thereby improving the safety of other vehicle driving and avoiding traffic accidents.

[0095] ​The embodiment of the present application further provides a vehicle comprising the deceleration system described in any of the above, the composition and function of each part of the deceleration system are the same as those of the deceleration system in the embodiment of the present application, and thus are not described herein again. By using the vehicle, the automatic deceleration measure can be timely performed when the driver is irradiated by strong light. Meanwhile, the driver of other vehicles around can be timely reminded by the danger warning lamp 700 and / or the brake lamp 600, so as to avoid traffic accidents and ensure the safety of the driving process of each vehicle.

[0096] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the present application disclosed herein. It is intended that the present application cover any and all variations of the present application comprising modifications and / or additions of features not present in the specification and fall within the scope of the present application. The specification and examples are to be considered exemplary only.

[0097] It is to be understood that the application is not limited to the precise details of construction and the arrangement of components described above and illustrated in the drawings, and that various modifications and changes can be made without departing from the scope of the present application. The scope of the application should only be limited by the appended claims.

Claims

1. A deceleration system characterized by, The deceleration system comprises a light sensor (100), a vehicle controller (200), a motor (300) and a distance sensor (1000), the vehicle controller (200) is respectively connected with the light sensor (100) and the motor (300) in signal mode; The light sensor (100) is used for monitoring the light intensity outside the vehicle, and when the light intensity is greater than a light intensity threshold value, a deceleration signal is generated and sent to the vehicle controller (200); The distance sensor (1000) is connected with the vehicle controller (200) in signal mode, and is installed at the tail of the vehicle and used for detecting the distance between the current vehicle and the rear vehicle to obtain a distance signal at a first time and a distance signal at a second time; The vehicle controller (200) is used for determining a target negative torque based on the deceleration signal, obtaining the distance signal from the distance sensor (1000), determining the relative speed and distance between the current vehicle and the rear vehicle based on the distance signal at the first time and the distance signal at the second time, determining a safety time based on the distance and the relative speed between the current vehicle and the rear vehicle, and controlling the motor (300) to output the target negative torque when the distance between the current vehicle and the rear vehicle is greater than a distance threshold value, so that the current vehicle is reduced to a target speed within the safety time.

2. The reduction system of claim 1, wherein, The deceleration system further comprises an accelerator pedal sensor (400) connected with the vehicle controller (200) in signal mode and used for monitoring the opening degree of the accelerator pedal to obtain a pedal signal; The vehicle controller (200) is further used for obtaining the pedal signal from the accelerator pedal sensor (400) in response to receiving the deceleration signal and determining the current opening degree of the accelerator pedal based on the pedal signal; The vehicle controller (200) is further used for controlling the motor (300) to output a target negative torque in response to the current opening degree being less than a pedal opening degree threshold value.

3. The deceleration system of claim 2, wherein, After controlling the motor (300) to output the target negative torque, the vehicle controller (200) is further used for: obtaining the pedal signal; controlling the motor (300) to stop outputting the target negative torque in response to the current opening degree being greater than the pedal opening degree threshold value.

4. The reduction system of claim 2, wherein, The deceleration system further comprises a vehicle speed monitor (500) connected with the vehicle controller (200) in signal mode and used for monitoring the current speed of the vehicle to obtain a vehicle speed signal; The vehicle controller (200) is further used for obtaining the vehicle speed signal from the vehicle speed monitor (500) and determining the current speed of the vehicle in response to the current opening degree being less than the pedal opening degree threshold value; The vehicle controller (200) is further used for controlling the motor (300) to output a target negative torque based on the current speed being greater than a vehicle speed threshold value.

5. The reduction system of claim 4, wherein, When the current speed is greater than the vehicle speed threshold value, the vehicle controller (200) is further used for: determine a first energy recovery power corresponding to the current vehicle speed based on the current vehicle speed and a preset energy recovery power table; determine a first torque based on the first energy recovery power; determine a second torque based on a maximum allowed recovery power corresponding to a current battery; obtain a third torque of a motor (300), wherein the third torque is a maximum torque allowed to be output by the motor (300); determine the target negative torque based on the first torque, the second torque and the third torque.

6. The reduction system of claim 5, wherein, The first energy recovery power and the current vehicle speed have a positive linear relationship.

7. The reduction system of claim 5, wherein, The determination of the target negative torque based on the first torque, the second torque and the third torque comprises: determining the minimum torque among the first torque, the second torque and the third torque as the target negative torque.

8. The reduction system of claim 4, wherein, The vehicle control unit (200) is further configured to generate a first alarm instruction when the current vehicle speed is greater than a vehicle speed threshold, wherein the first alarm instruction is used to instruct to turn on a brake light (600) of the vehicle.

9. The reduction system of claim 4, wherein, The vehicle control unit (200) is further configured to generate a second alarm instruction when the current vehicle speed is greater than a vehicle speed threshold, wherein the second alarm instruction is used to instruct to turn on a hazard warning light (700) of the vehicle.

10. A vehicle characterized by comprising: The vehicle comprises the deceleration system of any one of claims 1-9.

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