Height adjustment method of vehicle suspension system, vehicle controller and vehicle

Abstract

The present invention provides a method for adjusting the height of a suspension system of a vehicle, a vehicle controller and a vehicle. The method includes: determining the start time of the vehicle according to driving habit information; before the start time, pre-adjusting the height of the suspension system of the vehicle according to the predicted weather information corresponding to the predicted location; obtaining the driving state information of the vehicle, and judging whether the current driving condition of the vehicle is a driving condition according to the driving state information; and obtaining the rainfall information of the current position of the vehicle at a preset second time interval under the driving condition by using the rainfall acquisition device of the vehicle, and re-adjusting the height of the pre-adjusted suspension system according to the rainfall information. This solution pre-adjusts the height of the suspension system before traveling, avoiding the problem of slow adjustment speed when encountering a road section with heavy rainfall. Under the driving condition, the height of the suspension system is re-adjusted to make the height adjustment of the suspension system more accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle suspension control, and in particular to a height adjustment method of a vehicle suspension system, a vehicle controller and a vehicle. Background Art

[0002] During the frequent rainstorms in the summer, water can easily accumulate in low-lying roads and underground parking lots. Vehicles may have to pass through flooded roads for a long time or be parked in underground parking lots, which can easily cause the vehicles to be submerged in water and put the vehicle's electrical components at risk of short circuits.

[0003] In particular, with the support of national policies and the advancement of electric vehicle technology, electric vehicles are gradually becoming popular. Electric vehicles use high-voltage electricity from power batteries as a power source to drive the motor. The characteristics of high-voltage electricity from power batteries determine the importance of waterproofing and insulation of electric vehicles. When the batteries, motors, high-voltage wiring harnesses and their connectors of electric vehicles are immersed in water for a long time, it is very easy to cause risks such as high-voltage circuit short circuits in high-voltage components, thereby threatening the personal safety of drivers and passengers. Summary of the invention

[0004] The purpose of the present invention is to solve the problem in the prior art that the vehicle body is easily immersed in water, which affects driving safety.

[0005] To solve the above problems, an embodiment of the present invention discloses a method for adjusting the height of a suspension system of a vehicle, comprising:

[0006] S1: Acquire the driving habit information of the vehicle owner at a preset first time interval, and determine the start time of the vehicle according to the driving habit information;

[0007] S2: before the start time, obtaining the predicted weather information corresponding to the predicted location of the vehicle within a period of time in the future, and pre-adjusting the height of the suspension system of the vehicle according to the predicted weather information corresponding to the predicted location;

[0008] S3: Acquire driving state information of the vehicle, and determine whether the current driving condition of the vehicle is a driving condition according to the driving state information;

[0009] If so, the rainfall information of the current position of the vehicle is obtained by using the rainfall obtaining device of the vehicle at a preset second time interval, and the height of the pre-adjusted suspension system is readjusted according to the rainfall information;

[0010] If not, continue to obtain the driving state information of the vehicle, and determine whether the current driving condition of the vehicle is a driving condition according to the driving state information.

[0011] By adopting the above scheme, the start time of the vehicle is first determined according to the driving habit information, so as to pre-adjust the height of the suspension system before the start time. The height of the suspension system can be adjusted according to the weather information of the road section to be traveled before the trip, avoiding the problem of slow adjustment speed and easy immersion of the vehicle when temporarily adjusting the height of the suspension system when encountering a road section with heavy rainfall or water accumulation. In addition, the driving habit information is obtained at a preset first time interval instead of in real time, which can save energy consumption. Furthermore, under driving conditions, the height of the suspension system is readjusted according to the rainfall information, which can avoid the problem of low precision during pre-adjustment and make the height adjustment of the suspension system more accurate.

[0012] According to another specific embodiment of the present invention, in the method for adjusting the height of the suspension system of a vehicle disclosed in the embodiment of the present invention, in step S3, if the current driving condition of the vehicle is not a driving condition, step S3 further includes:

[0013] S3': acquiring power-on information of the vehicle in real time, and judging whether the current driving condition of the vehicle is a parking condition according to the power-on information and a preset first time threshold;

[0014] If yes, the water level information of the current position of the vehicle is obtained by using the water level sensor of the vehicle, and the height of the pre-adjusted suspension system is readjusted according to the water level information and the preset wading depth threshold;

[0015] If not, continue to judge whether the current driving condition of the vehicle is a parking condition according to the power-on information and the preset first time threshold.

[0016] With the above solution, the height of the pre-adjusted suspension system is readjusted according to the water level information in the parking condition, and the height of the suspension system can be adjusted even when the vehicle is parked, avoiding the problem of the vehicle being flooded due to the inability to adjust the height of the suspension system in the parking condition. In addition, the height of the suspension system is automatically adjusted when the vehicle is parked, and the driver does not need to keep paying attention to the height of the suspension system, which also improves the intelligence of the vehicle. In addition, judging whether the vehicle is in a parking condition based on a preset time threshold instead of obtaining it in real time can further save energy consumption.

[0017] According to another specific embodiment of the present invention, in the method for adjusting the height of the suspension system of a vehicle disclosed in the embodiment of the present invention, in step S1, the driving habit information includes the vehicle's historical driving route and the driving time corresponding to the historical driving route; and in step S2, the predicted weather information includes the predicted rain duration and rainfall per unit time of the predicted location of the vehicle; and pre-adjusting the height of the suspension system of the vehicle includes: calculating the predicted precipitation based on the predicted rain duration and the rainfall per unit time; calculating the first predicted wading depth of the vehicle in the future based on the predicted precipitation and the predicted location of the vehicle, and pre-adjusting the height of the suspension system of the vehicle based on the first predicted wading depth.

[0018] According to another specific embodiment of the present invention, in the height adjustment method of the suspension system of a vehicle disclosed in the embodiment of the present invention, in step S3, when it is determined that the current driving condition of the vehicle is a driving condition, obtaining the rainfall information of the current position of the vehicle by using the rainfall acquisition device includes:

[0019] Determine whether the rain sensor installed on the vehicle is faulty;

[0020] If the rain sensor is not faulty, proceed as follows:

[0021] Using the rain sensor to obtain the current rainfall value at the current location of the vehicle;

[0022] Determine whether the current rainfall value reaches the preset rainfall threshold;

[0023] If yes, adjusting the height of the pre-adjusted suspension system according to a preset first adjustment height;

[0024] If not, continue to determine whether the rainfall value reaches the preset rainfall threshold;

[0025] If the rain sensor is faulty, proceed as follows:

[0026] Obtaining the continuous working time of the wiper controller on the vehicle, and determining whether the continuous working time of the wiper controller reaches a preset time;

[0027] If the preset time is reached, the height of the pre-adjusted suspension system is adjusted according to a preset second adjustment height;

[0028] If the preset time has not been reached, it is further determined whether the continuous working time of the wiper controller has reached the preset time.

[0029] With the above solution, since the rain sensor can reflect the rainfall value at the current position of the vehicle in real time, when there is no fault in the rain sensor, the current rainfall value can be directly obtained by using the rain sensor, thereby improving the efficiency of data acquisition and thus improving the efficiency of suspension system adjustment. When the rain sensor fails, the height of the suspension system is adjusted according to the working time of the wiper controller, thereby avoiding the problem of inaccurate monitoring results caused by the failure of the rain sensor, thereby causing inaccurate adjustment of the suspension system. In addition, the height of the suspension system is adjusted according to the working time of the wiper controller, rather than according to whether the wiper controller is working, thereby avoiding the problem of inaccurate adjustment of the suspension system caused by the driver's misoperation of the wiper controller.

[0030] According to another specific embodiment of the present invention, the height adjustment method of the suspension system of a vehicle disclosed in the embodiment of the present invention, in step S3, when it is determined that the current driving condition of the vehicle is the driving condition, the height of the pre-adjusted suspension system is readjusted according to the rainfall information, including: readjusting the height of the pre-adjusted suspension system with a preset adjustment amount according to the rainfall information; wherein the preset adjustment amount ranges from ±10mm to ±30mm; and, in step S3', the water level sensing device includes at least two water level sensors arranged at corresponding positions in front and rear of the vehicle chassis respectively; and the water level information includes the height of each water level sensor and the immersion depth of each water level sensor; and, according to the water level information and the preset wading depth threshold, the height of the pre-adjusted suspension system is readjusted, including: determining a target water level sensor in each water level sensor according to the height and immersion depth of each water level sensor; wherein the target water level sensor is a water level sensor corresponding to the minimum value of the sum of the height of the water level sensor and the immersion depth;

[0031] Determine whether the sum of the height of the target water level sensor and the immersion depth is less than a preset wading depth threshold;

[0032] If so, raise the height of the suspension system;

[0033] If not, the height of the suspension system is not adjusted; and after the height of the suspension system is increased, the method further includes:

[0034] Determine whether the vehicle power-off time length is greater than a preset second time threshold;

[0035] If yes, the vehicle is controlled to send a vehicle moving instruction to the vehicle owner's terminal;

[0036] If not, continue to determine whether the vehicle power-off time length is greater than the second time threshold.

[0037] By adopting the above scheme, when the time the vehicle is powered off and stays for longer than the second time threshold, a vehicle moving instruction is sent to the vehicle owner's terminal to move the vehicle as soon as possible, thereby preventing the vehicle from being parked in a location with a lot of water for a long time, which may affect the function of the vehicle.

[0038] According to another specific embodiment of the present invention, in the height adjustment method of the suspension system of a vehicle disclosed in the embodiment of the present invention, in step S1, the range of the first time interval is 0.5 days to 3 days; in step S3, the range of the second time interval is 10 minutes to 30 minutes; the range of the first adjustment height is ±10mm to ±30mm; the range of the second adjustment height is ±10mm to ±30mm; in step S3', the range of the first time threshold is 20 minutes to 60 minutes; the range of the wading depth threshold is 150mm to 300mm; the range of the second time threshold is 0.5 hours to 2 hours.

[0039] According to another specific embodiment of the present invention, the embodiment of the present invention discloses a method for adjusting the height of a suspension system of a vehicle, wherein the suspension system is an air suspension system; the air suspension system includes a suspension controller, an electric air pump and an air spring; the suspension controller controls the pressure of the electric air pump to control the stiffness value of the air spring; and the height of the suspension system is adjusted or pre-adjusted, including: sending an adjustment instruction to the suspension controller to adjust the pressure of the electric air pump.

[0040] According to another specific embodiment of the present invention, in the height adjustment method of the suspension system of a vehicle disclosed in the embodiment of the present invention, the air spring includes four air springs respectively arranged on the left front wheel, the left rear wheel, the right front wheel and the right rear wheel of the vehicle; and the height of the suspension system is adjusted or pre-adjusted, and further includes: controlling the air springs corresponding to the front wheels and the rear wheels of the vehicle on a sloped road surface respectively; and controlling the air springs corresponding to the left wheel and the right wheel of the vehicle on an inclined road surface respectively; and controlling the air springs corresponding to the front wheels and the rear wheels of the vehicle according to the following formula:

[0041]

[0042] Among them, K1 is the stiffness of the air spring corresponding to the front wheel, K2 is the stiffness of the air spring corresponding to the rear wheel, F1 is the single wheel load of the front wheel, and F2 is the single wheel load of the rear wheel; L1 is the wheelbase of the vehicle, and θ is the inclination angle of the slope road surface; and the air springs corresponding to the left and right wheels of the vehicle are controlled according to the following formula:

[0043]

[0044] Among them, K3 is the stiffness of the air spring corresponding to the left wheel, K4 is the stiffness of the air spring corresponding to the right wheel, F3 is the single wheel load of the left wheel, F4 is the single wheel load of the right wheel; L2 is the wheelbase of the vehicle, and θ is the inclination angle of the inclined road surface.

[0045] By adopting the above solution, the height of the suspension corresponding to each wheel is adjusted respectively, so that the height adjustment method of the suspension system can be applied to different road conditions. By adjusting the suspension corresponding to each wheel on a slope road surface and a left-right inclined road surface respectively, the vehicle body can be kept in a more stable state, thereby improving the riding experience.

[0046] The embodiment of the present invention further discloses a vehicle controller, comprising:

[0047] A memory, the memory is used to store a control program;

[0048] The processor executes the steps of the method for adjusting the height of the suspension system of the vehicle as described in any of the above embodiments when processing the control program.

[0049] An embodiment of the present invention further discloses a vehicle, comprising the vehicle controller as described in the above embodiment.

[0050] The beneficial effects of the present invention are:

[0051] The height adjustment method of the suspension system of a vehicle provided by the present solution first determines the start time of the vehicle according to the driving habit information, so as to pre-adjust the height of the suspension system before the start time. The height of the suspension system can be adjusted according to the weather information of the road section to be traveled before the trip, thereby avoiding the problem of slow adjustment speed and easy immersion of the vehicle when temporarily adjusting the height of the suspension system when encountering a road section with heavy rainfall or water accumulation. In addition, the driving habit information is obtained at a preset first time interval instead of in real time, which can save energy consumption. Furthermore, under driving conditions, the height of the suspension system is readjusted according to the rainfall information, which can avoid the problem of low precision during pre-adjustment and make the height adjustment of the suspension system more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic flow chart of a method for adjusting the height of a suspension system of a vehicle provided by an embodiment of the present invention;

[0053] Figure 2 It is a schematic diagram of electrical connections of a suspension system of a vehicle provided in an embodiment of the present invention.

[0054] Description of reference numerals:

[0055] 1. Vehicle controller; 2. Suspension controller; 3. Electric air pump; 4. Air spring. DETAILED DESCRIPTION

[0056] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0057] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0058] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0059] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0060] Embodiment 1:

[0061] In order to solve the problem in the prior art that the vehicle body is easily immersed in water, which affects driving safety, an embodiment of the present invention provides a method for adjusting the height of a vehicle suspension system. Specifically, refer to Figure 1 The height adjustment method of the suspension system of a vehicle provided in this specific embodiment comprises the following steps:

[0062] S1: Acquire the driving habit information of the vehicle owner at a preset first time interval, and determine the start time of the vehicle according to the driving habit information;

[0063] S2: before the start time, obtaining the predicted weather information corresponding to the predicted location of the vehicle within a period of time in the future, and pre-adjusting the height of the suspension system of the vehicle according to the predicted weather information corresponding to the predicted location;

[0064] S3: Acquire driving state information of the vehicle, and determine whether the current driving condition of the vehicle is a driving condition according to the driving state information;

[0065] If so, the rainfall information of the current position of the vehicle is obtained by using the rainfall obtaining device of the vehicle at a preset second time interval, and the height of the pre-adjusted suspension system is readjusted according to the rainfall information;

[0066] If not, continue to obtain the driving state information of the vehicle, and determine whether the current driving condition of the vehicle is a driving condition according to the driving state information.

[0067] Specifically, the first time interval ranges from 0.5 days to 3 days; specifically, it can be 0.5 days, 1 day, 2 days or 3 days, or any time within the range. Moreover, in this specific implementation, the driving habits of the owner are obtained at a preset first time interval, rather than in real time, which reduces energy consumption. More specifically, a period of time in the future can be determined based on the driving habits of the owner, and specifically can be the length of time the vehicle is expected to travel. Only the position of the vehicle in a period of time in the future is predicted, rather than the position of the vehicle in a longer period of time, which improves the accuracy of the prediction and thus improves the accuracy of the height adjustment of the suspension system. More specifically, the second time interval ranges from 10 minutes to 30 minutes; for example, 10 minutes, 15 minutes, 20 minutes, 30 minutes or any other value within the range. Obtaining rainfall information at a preset second time interval, rather than in real time, can achieve the effect of reducing energy consumption. Moreover, according to experimental data, if the second time interval is short, the rainfall acquisition device will be frequently activated, which will inevitably consume a lot of energy; if the second time interval is long, if the weather changes rapidly, such as showers, it will cause inaccurate rainfall collection. Setting the second time interval range to 10 minutes to 30 minutes can achieve a better balance between energy saving and collection accuracy.

[0068] The height adjustment method of the suspension system of a vehicle provided in this embodiment has the following steps: first, the start time of the vehicle is determined according to the driving habit information, so as to pre-adjust the height of the suspension system before the start time. The height of the suspension system can be adjusted according to the weather information of the road section to be traveled before the trip, so as to avoid the problem of slow adjustment speed and easy immersion of the vehicle when the height of the suspension system is temporarily adjusted when encountering a road section with heavy rainfall or water accumulation. In addition, the driving habit information is obtained at a preset first time interval instead of in real time, which can save energy consumption. Furthermore, under the driving condition, the height of the suspension system is readjusted according to the rainfall information, which can avoid the problem of low precision during pre-adjustment and make the height adjustment of the suspension system more accurate.

[0069] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, in step S3, if the current driving condition of the vehicle is not a traveling condition, step S3 further includes:

[0070] S3': acquiring power-on information of the vehicle in real time, and judging whether the current driving condition of the vehicle is a parking condition according to the power-on information and a preset first time threshold;

[0071] If yes, the water level information of the current position of the vehicle is obtained by using the water level sensor of the vehicle, and the height of the pre-adjusted suspension system is readjusted according to the water level information and the preset wading depth threshold;

[0072] If not, continue to judge whether the current driving condition of the vehicle is a parking condition according to the power-on information and the preset first time threshold.

[0073] Specifically, the power-on information of the vehicle refers to the information of whether the vehicle is powered on and started, which can be obtained through the engine status detection component or the battery status detection component. That is, when the engine is not started or the battery does not output current, it is considered that the current driving condition of the vehicle is a parking condition. In the parking condition, the height of the pre-adjusted suspension system is readjusted according to the water level information, and the height of the suspension system can be adjusted even when the vehicle is parked, avoiding the problem that the height of the suspension system cannot be adjusted in the parking condition, thereby causing the vehicle to be flooded. In addition, the height of the suspension system is automatically adjusted when parking, and the driver does not need to continue to pay attention to the height of the suspension system, which also improves the intelligence of the vehicle. In addition, judging whether the vehicle is in a parking condition based on a preset time threshold instead of real-time acquisition can further save energy consumption. It should be noted that the range of the first time threshold is 20 minutes to 60 minutes, and can be 20 minutes, 40 minutes, 60 minutes or other values ​​within the range. If the first time threshold is short, it will cause misjudgment of temporary parking, waiting for red lights, traffic jams, etc. If the first time threshold is long, the state of the vehicle body being flooded will last for a long time. In this specific implementation, the range of the first time threshold is set to 20 minutes to 60 minutes, which not only reduces the possibility of misjudgment of the parking condition, but also allows the parking condition to be judged in a timely manner and the water level information to be obtained using the water level sensor device.

[0074] Furthermore, in the height adjustment method of the suspension system of the vehicle according to the present invention, in step S1, the driving habit information includes the historical driving route of the vehicle and the driving time corresponding to the historical driving route. With such a step, by collecting the historical driving route of the vehicle and the time corresponding to the historical driving route, the future driving route and opening time of the vehicle can be more accurately predicted, and the future formal route and corresponding driving time obtained by the vehicle-mounted communication device can be combined to accurately analyze the flood situation when the vehicle enters the route at the driving time. The height of the suspension system can be adjusted based on these analysis data to make the adjustment accuracy higher.

[0075] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, in step S2, the predicted weather information includes the predicted rain duration and rainfall per unit time at the predicted location of the vehicle.

[0076] Furthermore, in the height adjustment method of the suspension system of the vehicle according to the present invention, pre-adjusting the height of the suspension system of the vehicle includes: calculating the predicted precipitation according to the predicted duration of rain and the rainfall per unit time; calculating the first predicted wading depth of the vehicle in the future according to the predicted precipitation and the predicted location of the vehicle, and pre-adjusting the height of the suspension system of the vehicle according to the first predicted wading depth. Specifically, the first predicted wading depth refers to the depth of water accumulation at the location when the vehicle enters the predicted location. Adjusting the height of the suspension system according to the first predicted wading depth can be comparing the height of the chassis of the vehicle body with the depth of water accumulation. If the height of the chassis of the vehicle body is greater than the depth of water accumulation, there is no need to adjust the height of the suspension system, or the suspension system can be lowered to a position about 10 mm higher than the depth of water accumulation. If the height of the chassis of the vehicle body is less than the depth of water accumulation, it is necessary to increase the height of the suspension system so that the height of the chassis of the vehicle body is greater than the depth of water accumulation.

[0077] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, in step S3, when it is determined that the current driving condition of the vehicle is the driving condition, obtaining the rainfall information of the current position of the vehicle by using the rainfall acquisition device includes: determining whether a rainfall sensor provided on the vehicle is faulty;

[0078] If the rain sensor is not faulty, proceed as follows:

[0079] Using the rain sensor to obtain the current rainfall value at the current location of the vehicle;

[0080] Determine whether the current rainfall value reaches the preset rainfall threshold;

[0081] If yes, adjusting the height of the pre-adjusted suspension system according to a preset first adjustment height;

[0082] If not, continue to determine whether the rainfall value reaches a preset rainfall threshold.

[0083] That is to say, when there is no fault in the rain sensor, the current rainfall value is obtained by using the rain sensor, and the rainfall value is judged so that the height of the suspension system is raised when the rainfall value is greater than the threshold. It should be noted that the range of the first adjustment height is ±10mm to ±30mm, for example, it can be -30mm, -15mm, -5mm, 5mm, 25mm, 30mm, or other values ​​within the range. Among them, + represents raising the height of the suspension system, and - represents lowering the height of the suspension system. Experiments show that if the height adjustment amount of the suspension system is large during driving, it will affect the riding experience of the occupants; and if the height adjustment amount of the suspension system is small, the vehicle will still be at risk of flooding. In this specific implementation, the range of the preset adjustment amount is set to ±10mm to ±30mm, which can achieve a better balance between riding experience and reducing the risk of water ingress.

[0084] If the rain sensor is faulty, proceed as follows:

[0085] Obtaining the continuous working time of the wiper controller on the vehicle, and determining whether the continuous working time of the wiper controller reaches a preset time;

[0086] If the preset time is reached, the height of the pre-adjusted suspension system is adjusted according to a preset second adjustment height;

[0087] If the preset time has not been reached, it is further determined whether the continuous working time of the wiper controller has reached the preset time.

[0088] That is to say, when the rain sensor fails, it will be determined whether the working time of the wiper controller reaches the threshold. If the threshold is reached, it means that there is a lot of rain in the current driving state, and there may be a risk of water immersion in the vehicle body, and the height of the suspension system needs to be increased. With such a step, since the rain sensor can reflect the rainfall value of the current position of the vehicle in real time, when the rain sensor does not fail, the current rainfall value is directly obtained by using the rain sensor, which improves the efficiency of data acquisition and thus improves the efficiency of suspension system adjustment. When the rain sensor fails, the height of the suspension system is adjusted using the working time of the wiper controller, avoiding the problem of inaccurate monitoring results caused by the failure of the rain sensor, thereby causing inaccurate adjustment of the suspension system. In addition, the height of the suspension system is adjusted according to the working time of the wiper controller, rather than according to whether the wiper controller is working, which avoids the problem of inaccurate adjustment of the suspension system caused by the driver's misoperation of the wiper controller. It should be noted that the range of the second adjustment height is ±10mm to ±30mm; for example, it can be -30mm, -15mm, -5mm, 5mm, 25mm, 30mm, or other values ​​within the range. Among them, + indicates raising the height of the suspension system, and - indicates lowering the height of the suspension system. Experiments show that if the height adjustment of the suspension system is large during driving, it will affect the riding experience of the occupants; if the height adjustment of the suspension system is small, the vehicle will still be at risk of flooding. In this specific implementation, the preset adjustment range is set to ±10mm to ±30mm, which can directly achieve a good balance between riding experience and reducing the risk of water ingress.

[0089] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, in step S3, when it is determined that the current driving condition of the vehicle is the driving condition, the height of the pre-adjusted suspension system is readjusted according to the rainfall information, including: readjusting the height of the pre-adjusted suspension system according to the rainfall information with a preset adjustment amount. That is to say, when the vehicle is driving, if the height of the suspension system needs to be adjusted, it needs to be adjusted with a preset adjustment amount. In this specific implementation, the preset adjustment amount ranges from ±10mm to ±30mm, for example, it can be -30mm, -15mm, -5mm, 5mm, 25mm, 30mm, or other values ​​within the range. Among them, + represents raising the height of the suspension system, and - represents lowering the height of the suspension system. Experiments show that if the height adjustment amount of the suspension system is large during driving, it will affect the riding experience of the occupants; and if the height adjustment amount of the suspension system is small, the vehicle will still be at risk of flooding. In this specific implementation, the preset adjustment amount range is set to ±10mm to ±30mm, which can directly achieve a better balance between riding experience and reducing the risk of water ingress.

[0090] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, in step S3', the water level sensing device includes at least two water level sensors arranged at corresponding positions in front and rear of the vehicle chassis. Specifically, the water level sensors are arranged in pairs, and can be one pair, two pairs or even three pairs. When one pair is provided, one water level sensor is arranged in the middle position of the front side of the chassis, and the other water level sensor is arranged in the middle position of the rear side of the chassis. When two pairs are provided, the four water level sensors can be respectively arranged at the four corners of the chassis. In this specific embodiment, considering the vehicle body manufacturing cost, it is preferred to set two water level sensors. And, in this specific embodiment, the water level information includes the height of each water level sensor and the immersion depth of each water level sensor. The height of the water level sensor refers to the installation height of the water level sensor, that is, the distance between the lowest end of the water level sensor and the chassis; the immersion depth of the water level sensor refers to the depth of the water level sensor submerged in water.

[0091] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, the height of the pre-adjusted suspension system is readjusted according to the water level information and the preset wading depth threshold, including:

[0092] Determine a target water level sensor among the water level sensors according to the height and immersion depth of each water level sensor;

[0093] Determine whether the sum of the height of the target water level sensor and the immersion depth is less than a preset wading depth threshold;

[0094] If so, raise the height of the suspension system;

[0095] If not, the height of the suspension system is not adjusted.

[0096] It should be noted that the target water level sensor is a water level sensor corresponding to the minimum value of the sum of the height of the water level sensor and the immersion depth. In other words, as long as the sum of the height of one of the water level sensors and the immersion depth is less than the preset wading depth threshold, it means that the vehicle is likely to be submerged in water, and the height of the suspension system needs to be increased. It should also be noted that the range of the wading depth threshold is 150mm to 300mm, and specifically can be 150mm, 180mm, 250mm, 300mm or other values ​​within this range. When the sum of the height of the target water level sensor and the immersion depth is less than the preset wading depth threshold, it means that the vehicle body parts are at risk of being submerged in water, and the height of the suspension system needs to be increased in time.

[0097] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, after raising the height of the suspension system, it also includes: determining whether the length of the vehicle power-off time is greater than a preset second time threshold;

[0098] If yes, the vehicle is controlled to send a vehicle moving instruction to the vehicle owner's terminal;

[0099] If not, continue to determine whether the vehicle power-off time length is greater than the second time threshold.

[0100] That is to say, when the time the vehicle is powered off and stays for is greater than the second time threshold, it means that the owner has left the vehicle. At this time, it is necessary to send a moving vehicle instruction to the owner's terminal to move the vehicle as soon as possible to prevent the vehicle from being parked in a location with more water for a long time, which will affect the function of the vehicle. The owner's terminal can be a mobile phone, tablet or other device bound to the vehicle, and this specific implementation is not limited to this. More specifically, the range of the second time threshold is 0.5 hours to 2 hours, for example, it can be 0.5 hours, 1 hour or 2 hours. If the second time threshold is short, it will cause a misjudgment of the situation that the owner takes a nap in the car and does not leave the vehicle, and if the second time threshold is long, the state of the car body being immersed in water will last for a long time, which will cause damage to the battery, motor, high-voltage wiring harness and its connectors, and it is very easy to cause the risk of high-voltage circuit short circuit in the high-voltage components, thereby threatening the personal safety of the driver and passengers. In this specific implementation, the range of the second time threshold is set to 0.5 hours to 2 hours, which not only reduces the possibility of misjudgment of whether the owner has left the vehicle, but also avoids the state of the car body being immersed in water for a long time.

[0101] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, the suspension system is an air suspension system. Figure 2 , the air suspension system includes a suspension controller 2, an electric air pump 3 and an air spring 4; the suspension controller controls the pressure of the electric air pump to control the stiffness value of the air spring. In addition, the height of the suspension system is adjusted or pre-adjusted, including: sending an adjustment instruction to the suspension controller to adjust the pressure of the electric air pump. That is to say, in this specific embodiment, when the height of the suspension system is adjusted, the vehicle controller 1 will be used to issue an adjustment instruction, and after the suspension controller 2 receives the adjustment instruction from the vehicle controller 1, it drives the electric air pump 3 to pressurize. After the electric air pump reaches the specified pressure 3, the stiffness of the air spring 4 also reaches the specified stiffness value. Changes in the stiffness of the air spring 4 will cause the height of the suspension system to change.

[0102] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, the air spring includes four air springs respectively arranged on the left front wheel, the left rear wheel, the right front wheel and the right rear wheel of the vehicle. Adjusting or pre-adjusting the height of the suspension system also includes: controlling the air springs corresponding to the front and rear wheels of the vehicle on a sloped road surface; and controlling the air springs corresponding to the left and right wheels of the vehicle on an inclined road surface. That is to say, in this specific embodiment, the suspension corresponding to each wheel can be adjusted separately. That is, on a sloped road surface, the front and rear heights of the vehicle can be controlled separately; on a road surface inclined to the left and right, the heights of the left and right sides of the vehicle can be controlled separately. In this way, by adjusting the heights of the suspensions corresponding to each wheel separately, the height adjustment method of the suspension system can be applied to different road conditions. Adjusting the suspensions corresponding to each wheel separately on a sloped road surface and a road surface inclined to the left and right can also keep the vehicle body in a more stable state, thereby improving the riding experience.

[0103] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, the air springs corresponding to the front wheels and the rear wheels of the vehicle are controlled according to the following formula:

[0104]

[0105] Among them, K1 is the stiffness of the air spring corresponding to the front wheel, K2 is the stiffness of the air spring corresponding to the rear wheel, F1 is the single wheel load of the front wheel, F2 is the single wheel load of the rear wheel; L1 is the wheelbase of the vehicle, and θ is the inclination angle of the slope road surface.

[0106] Further, in the height adjustment method of the suspension system of the vehicle according to the present invention, the air springs corresponding to the left and right wheels of the vehicle are controlled according to the following formula:

[0107]

[0108] Among them, K3 is the stiffness of the air spring corresponding to the left wheel, K4 is the stiffness of the air spring corresponding to the right wheel, F3 is the single wheel load of the left wheel, F4 is the single wheel load of the right wheel; L2 is the wheelbase of the vehicle, and θ is the inclination angle of the inclined road surface. Specifically, the stiffness of the air spring can be measured by a stiffness sensor, and the wheel load can also be measured by a wheel load meter. The wheelbase is obtained through actual measurement, and the inclination angle of the road surface can be calculated by the tire position.

[0109] Embodiment 2:

[0110] The historical driving routes and driving time of the vehicle are obtained every two days, and the vehicle start time is predicted based on the above data. Before the vehicle starts, the predicted location of the vehicle is predicted based on the historical driving route, and the vehicle communication system is used to obtain the rainfall and raining time period of the vehicle at the predicted location in the next two hours. The vehicle controller will pre-adjust the height of the suspension system based on the above-mentioned information such as rainfall and raining time period to reduce the risk of vehicle immersion.

[0111] When the vehicle is in driving condition, it is determined in real time whether the rain sensor of the vehicle is faulty. If no fault occurs, the rainfall information collected by the rain sensor is compared with the preset rainfall threshold, and when the rainfall information exceeds the rainfall threshold, the height of the suspension system is adjusted. In addition, when adjusting the height of the suspension system, it is adjusted according to the rainfall value within the range of ±10mm to ±30mm. That is, the greater the rainfall, the greater the adjustment amount, and the smaller the rainfall, the smaller the adjustment amount. If the rain sensor fails, the duration of the wiper continuous work is determined according to the electrical signal of the wiper controller. If the duration exceeds 30 minutes, it means that the current vehicle is in a rainy environment and the height of the suspension system needs to be adjusted to prevent the vehicle from being submerged in water.

[0112] If the vehicle is not in driving state, it can be determined whether the time when the vehicle has not been powered on exceeds 20 minutes. If so, it means that the vehicle is in parking condition. At this time, the two water level sensors respectively installed on the front and rear of the swing arm of the chassis structure are used to obtain the water immersion depth information of the vehicle body, and combined with the sensor height, it is compared with the wading depth threshold of 300mm. If the sum of the height of any water level sensor and the immersion depth is less than 300mm, it means that the vehicle is submerged in water and the height of the suspension system needs to be adjusted. On this basis, if the vehicle is powered off and stays for more than one hour, it is considered that the owner has left the vehicle. The on-board communication system will then issue an instruction to contact the owner to move the vehicle and transfer the vehicle to a higher place, thereby reducing the risk of the vehicle being submerged in water.

[0113] Embodiment 3:

[0114] Based on the height adjustment method of the suspension system of the vehicle, an embodiment of the present invention further provides a vehicle controller, including: a memory and a processor. The memory is used to store a control program; when the processor processes the control program, it executes the steps of the height adjustment method of the suspension system of the vehicle described in any of the above embodiments.

[0115] Embodiment 4:

[0116] Based on the above vehicle controller, an embodiment of the present invention further provides a vehicle, comprising the vehicle controller as described in the above embodiment.

[0117] The vehicle provided in this specific embodiment, because it has the above-mentioned vehicle controller, can pre-adjust the height of the suspension system before the start time, avoiding the problem of slow adjustment speed when temporarily adjusting the height of the suspension system when encountering a section with heavy rainfall or water accumulation, which easily causes the vehicle to be immersed in water. In addition, under driving conditions, the height of the suspension system is readjusted according to the rainfall information, which can avoid the problem of low accuracy during pre-adjustment and make the height adjustment of the suspension system more accurate. In addition, the vehicle can ensure the safety of people and property by judging the specific situation of wading and transferring the vehicle in advance.

[0118] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A method for adjusting the height of a suspension system of a vehicle, characterized in that: include: S1: Acquire the driving habit information of the vehicle owner at a preset first time interval, and determine the start time of the vehicle according to the driving habit information; S2: before the start time, obtaining predicted weather information corresponding to the predicted location of the vehicle within a period of time in the future, and pre-adjusting the height of the suspension system of the vehicle according to the predicted weather information corresponding to the predicted location; S3: Acquire driving state information of the vehicle, and determine whether the current driving condition of the vehicle is a driving condition according to the driving state information; If yes, then obtaining rainfall information of the current position of the vehicle by using the rainfall obtaining device of the vehicle at a preset second time interval, and re-adjusting the height of the suspension system after the pre-adjustment according to the rainfall information; If not, continue to obtain the driving state information of the vehicle, and determine whether the current driving condition of the vehicle is a driving condition according to the driving state information.

2. The method for adjusting the height of a suspension system of a vehicle according to claim 1, characterized in that: In the step S3, if the current driving condition of the vehicle is not the driving condition, the step S3 further includes: S3': acquiring power-on information of the vehicle in real time, and judging whether the current driving condition of the vehicle is a parking condition according to the power-on information and a preset first time threshold; If yes, using the water level sensor of the vehicle to obtain water level information of the current position of the vehicle, and readjusting the height of the suspension system after the pre-adjustment according to the water level information and a preset wading depth threshold; If not, continue to judge whether the current driving condition of the vehicle is a parking condition according to the power-on information and the preset first time threshold.

3. The method for adjusting the height of a suspension system of a vehicle according to claim 2, wherein: In step S1, the driving habit information includes the historical driving route of the vehicle and the driving time corresponding to the historical driving route; and In the step S2, the predicted weather information includes the predicted rain duration and rainfall per unit time at the predicted location of the vehicle; and Pre-adjusting the height of the suspension system of the vehicle includes: Calculating predicted precipitation according to the predicted rain duration and the rainfall per unit time; A first predicted wading depth of the vehicle in the future is calculated based on the predicted precipitation and the predicted location of the vehicle, and a height of a suspension system of the vehicle is pre-adjusted based on the first predicted wading depth.

4. The method for adjusting the height of a suspension system of a vehicle according to claim 3, characterized in that: In step S3, when it is determined that the current driving condition of the vehicle is a traveling condition, using the rainfall acquisition device to acquire rainfall information at the current location of the vehicle includes: Determining whether a rain sensor provided on the vehicle is faulty; If the rain sensor is not faulty, proceed as follows: Using the rain sensor to obtain a current rainfall value at the current location of the vehicle; Determining whether the current rainfall value reaches a preset rainfall threshold; If yes, adjusting the height of the pre-adjusted suspension system according to a preset first adjustment height; If not, continue to determine whether the rainfall value reaches a preset rainfall threshold; If the rain sensor is faulty, proceed as follows: Obtaining the continuous working time of the wiper controller on the vehicle, and determining whether the continuous working time of the wiper controller reaches a preset time; If the preset time length is reached, adjusting the height of the pre-adjusted suspension system according to a preset second adjustment height; If the preset time has not been reached, it is further determined whether the continuous working time of the wiper controller has reached the preset time.

5. The method for adjusting the height of a suspension system of a vehicle according to claim 4, characterized in that: In the step S3, when it is determined that the current driving condition of the vehicle is a driving condition, the height of the suspension system after the pre-adjustment is readjusted according to the rainfall information, including: Re-adjusting the height of the suspension system after the pre-adjustment by a preset adjustment amount according to the rainfall information; wherein The preset range of the adjustment amount is ±10 mm to ±30 mm; and In the step S3', the water level sensing device comprises at least two water level sensors respectively arranged at corresponding positions in front and rear of the vehicle chassis; and The water level information includes the height of each of the water level sensors and the immersion depth of each of the water level sensors; and Re-adjusting the height of the suspension system after the pre-adjustment according to the water level information and a preset wading depth threshold includes: Determine a target water level sensor among the water level sensors according to the height and the immersion depth of each water level sensor; wherein the target water level sensor is the water level sensor corresponding to the minimum value of the sum of the height and the immersion depth of the water level sensor; Determining whether the sum of the height of the target water level sensor and the immersion depth is less than a preset wading depth threshold; If yes, raising the height of the suspension system; If not, then the height of the suspension system is not adjusted; and After raising the height of the suspension system, the method further comprises: Determining whether the vehicle power-off time length is greater than a preset second time threshold; If yes, control the vehicle to send a vehicle moving instruction to the vehicle owner terminal; If not, continue to determine whether the vehicle power-off time length is greater than the second time threshold.

6. The method for adjusting the height of a suspension system of a vehicle according to claim 5, characterized in that: In step S1, the first time interval ranges from 0.5 days to 3 days; In step S3, the second time interval ranges from 10 minutes to 30 minutes; The range of the first adjustment height is from ±10 mm to ±30 mm; The range of the second adjustment height is from ±10 mm to ±30 mm; In the step S3', the first time threshold ranges from 20 minutes to 60 minutes; The wading depth threshold ranges from 150 mm to 300 mm; The second time threshold ranges from 0.5 hours to 2 hours.

7. The method for adjusting the height of a suspension system of a vehicle according to claim 6, wherein: The suspension system is an air suspension system; The air suspension system includes a suspension controller, an electric air pump and an air spring; the suspension controller controls the pressure of the electric air pump to control the stiffness value of the air spring; and Adjusting or pre-adjusting the height of the suspension system comprises: An adjustment instruction for adjusting the pressure of the electric air pump is sent to the suspension controller.

8. The method for adjusting the height of a suspension system of a vehicle according to claim 7, wherein: The air springs include four air springs respectively arranged on the left front wheel, the left rear wheel, the right front wheel and the right rear wheel of the vehicle; and Adjusting or pre-adjusting the height of the suspension system also includes: On a sloped road, the air springs corresponding to the front wheels and the rear wheels of the vehicle are controlled respectively; and On an inclined road, the air springs corresponding to the left wheel and the right wheel of the vehicle are controlled respectively; and The air springs corresponding to the front wheels and rear wheels of the vehicle are controlled according to the following formula: Wherein, K1 is the stiffness of the air spring corresponding to the front wheel, K2 is the stiffness of the air spring corresponding to the rear wheel, F1 is the single wheel load of the front wheel, and F2 is the single wheel load of the rear wheel; L1 is the wheelbase of the vehicle, and θ is the inclination angle of the slope road surface; and The air springs corresponding to the left and right wheels of the vehicle are controlled according to the following formula: Among them, K3 is the stiffness of the air spring corresponding to the left wheel, K4 is the stiffness of the air spring corresponding to the right wheel, F3 is the single wheel load of the left wheel, F4 is the single wheel load of the right wheel; L2 is the wheelbase of the vehicle, and θ is the inclination angle of the inclined road surface.

9. A vehicle controller, characterized in that: include: A memory, wherein the memory is used to store a control program; A processor, wherein when processing the control program, the processor executes the steps of the height adjustment method of the vehicle suspension system as described in any one of claims 1-8.

10. A vehicle, characterized in that: Including the vehicle controller as claimed in claim 9.

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