A method for self-leveling and leveling front suspension

Abstract

This invention provides a front suspension self-balancing method, relating to the field of new energy truck technology, comprising the following steps: S1: When the truck is in driving mode, the balancing operation begins; S2: When the height of the height bar is higher than a predetermined threshold, the functional cylinder deflates; when the height of the height bar is lower than the predetermined threshold, the functional cylinder inflates; S3: Determine whether the height difference between the two height bars is greater than a first predetermined difference value; if so, proceed to step S4; otherwise, do not proceed; S4: Adjust the inflation and deflation of the two functional cylinders according to the pressure sensor values ​​of the two buffer pillars. In this invention, the left and right adjustment units and buffer pillars in the front suspension assembly provide buffer adjustment for the front suspension. During driving, the cooperation of the two adjustment units and buffer pillars enables bilateral synchronous self-balancing of the new energy truck, effectively preventing truck rollover and improving ride comfort and safety.

Description

Technical Field

[0001] This invention relates to the field of new energy truck technology, and in particular, to a method for self-leveling and balancing the front suspension. Background Technology

[0002] Freight trucks, also known as cargo trucks or lorries, are vehicles primarily used for transporting goods, and sometimes also refer to vehicles capable of towing other vehicles. They belong to the category of commercial vehicles. They are generally classified into heavy-duty and light-duty types based on their weight. The vast majority of freight trucks are powered by diesel engines, but some light-duty trucks use gasoline, LPG, or natural gas. With the large-scale development of new energy technologies in China, some freight trucks are also using electric power or other new energy sources.

[0003] Because new energy trucks have better acceleration and deceleration performance, the requirements for shock absorption and collision protection are higher. The cabs of new energy trucks generally adopt a suspension system structure for shock absorption and collision protection. The cab suspension system includes a front suspension assembly located between the lower front part of the cab and the frame, and a rear suspension assembly located between the lower rear part of the cab and the frame. It mainly plays a role in supporting the cab, preventing rollover and anti-rollover, while attenuating the vibration and impact transmitted to the cab by uneven road surfaces during vehicle operation, guiding the vertical movement of the cab relative to the ground, limiting the cab's roll and yaw movements, and improving ride comfort.

[0004] Current front suspension assemblies typically have multiple buffer components on the suspension assembly, each designed to provide simple cushioning during truck vibrations. However, the elastic buffer adjustments on both sides cannot be effectively coordinated, making it impossible to achieve self-adaptive balancing of the front suspension.

[0005] Therefore, in order to solve the above problems, it is necessary for us to design a reasonable front suspension self-leveling method. Summary of the Invention

[0006] The purpose of this invention is to provide a front suspension self-balancing method. In the front suspension assembly, two adjustment units on the left and right sides and a buffer column perform buffer adjustment on the front suspension. During driving, through the cooperation of the two adjustment units and the buffer column, the method can effectively perform bilateral synchronous self-balancing for the special driving posture of new energy trucks with high torque and rapid acceleration and deceleration. This can effectively prevent trucks from overturning and improve ride comfort and safety.

[0007] To achieve the above objectives, the present invention employs the following technical solution:

[0008] A front suspension self-leveling method is disclosed, applicable to a front suspension self-leveling structure. The structure includes an upper beam and a lower beam, with an adjustment unit and a buffer column disposed between the upper and lower beams. The two adjustment units and buffer columns are symmetrically arranged left and right. The adjustment unit includes a functional cylinder, a height rod disposed on the upper beam extending towards the lower beam, and a sensing valve disposed on the lower beam for obtaining the height of the height rod. A pressure sensor is disposed on the buffer column, and both the sensing valve and the pressure sensor are electrically connected to the functional cylinder.

[0009] The method includes the following steps:

[0010] S1: Determine whether the truck is in a driving state. If yes, proceed to step S2; otherwise, do not perform the operation.

[0011] S2: The sensing valve obtains the height of the height rod in real time, so that when the height of the height rod is higher than a predetermined threshold, the functional cylinder releases air; and when the height of the height rod is lower than the predetermined threshold, the functional cylinder inflates air.

[0012] S3: Determine whether the height difference between the two height bars is greater than the first predetermined difference value. If so, proceed to step S4; otherwise, do not perform the operation.

[0013] S4: Adjust the inflation and deflation of the two functional cylinders based on the pressure sensor values ​​of the two buffer columns.

[0014] As a preferred embodiment of the present invention, the distance L between the functional cylinder and the height rod is obtained before performing step S2;

[0015] This ensures that during step S2,

[0016] The filling and discharging volume P of the functional cylinder is ΔH*L / a;

[0017] Where: ΔH is the difference between the height of the height bar and the predetermined threshold; a is the preset cargo loading coefficient value.

[0018] As a preferred embodiment of the present invention, step S4 specifically includes:

[0019] S41: Determine whether the difference between the values ​​of the two pressure sensors is greater than the second predetermined difference. If so, proceed to step S42; otherwise, perform first-stage inflation / deflation adjustment on the two functional cylinders.

[0020] S42: Determine whether the values ​​of the two pressure sensors are not greater than the calibrated threshold. If so, perform a two-stage inflation / deflation adjustment on the two functional cylinders; otherwise, perform a three-stage inflation / deflation adjustment on the two functional cylinders.

[0021] As a preferred embodiment of the present invention, when performing step S41, the two functional cylinders are subjected to a first-stage inflation / deflation adjustment, specifically as follows:

[0022] The charging and discharging of two functional cylinders are adjusted according to the values of two pressure sensors, and the charging and discharging volume P11 of the functional cylinder on the side with a larger pressure sensor value is:

[0023] P11 = ΔH * L / a + T_large * b;

[0024] The charging and discharging volume P21 of the functional cylinder on the side with a smaller pressure sensor value is:

[0025] P21 = ΔH * L / a + T_small * b;

[0026] Where, T_large is the value of the pressure sensor on the side with a larger pressure sensor value, T_small is the value of the pressure sensor on the side with a smaller pressure sensor value, and b is the preset pressure influence coefficient value.

[0027] As a preference of the present invention, when step S42 is executed, secondary charging and discharging adjustment of the two functional cylinders is performed, specifically:

[0028] The charging and discharging of the two functional cylinders are adjusted according to the difference between the values of the two pressure sensors, and the charging and discharging volume P12 of the functional cylinder on the side with a larger pressure sensor value is:

[0029] P12 = ΔH * L / a + T_large * b + (T_large - T_small) * c;

[0030] The charging and discharging volume P22 of the functional cylinder on the side with a smaller pressure sensor value is:

[0031] P22 = ΔH * L / a + T_small * b - (T_large - T_small) * c;

[0032] Where, c is the first preset trimming coefficient value.

[0033] As a preference of the present invention, when step S42 is executed, tertiary charging and discharging adjustment of the two functional cylinders is performed, specifically:

[0034] The charging and discharging of the two functional cylinders are adjusted according to the difference between the pressure sensor value and the calibration threshold, and the charging and discharging volume P13 of the functional cylinder on the side with a larger pressure sensor value is:

[0035] P13 = ΔH * L / a + T_large * b + (T_large - T_small) * c + (T_large - T0) * d;

[0036] The charging and discharging volume P23 of the functional cylinder on the side with a smaller pressure sensor value is:

[0037] P23 = ΔH * L / a + T_small * b - (T_large - T_small) * c + (T_small - T0) * d;

[0038] Where d is the second preset balancing coefficient value; T0 is the calibration threshold.

[0039] As a preferred embodiment of the present invention, the number of the functional cylinders is at least one.

[0040] As a preferred embodiment of the present invention, an electrical connection between the two sensing valves is established before performing step S3.

[0041] As a preferred embodiment of the present invention, after adjusting the inflation and deflation of the two functional cylinders in step S4, the process returns to step S2.

[0042] As a preferred embodiment of the present invention, when performing step S4, an alarm signal is issued when the two functional cylinders are adjusted for three-stage inflation and deflation.

[0043] The beneficial effects of the self-leveling and leveling method for front suspension of the present invention are as follows:

[0044] In the front suspension assembly, the two adjustment units on the left and right and the buffer column provide buffer adjustment for the front suspension. When driving, the two adjustment units and the buffer column work together to effectively adjust the double-sided synchronous self-leveling for the special driving posture of new energy trucks with high torque and rapid acceleration and deceleration. This can effectively prevent the truck from overturning and improve ride comfort and safety. Attached Figure Description

[0045] Figure 1 This is a schematic flowchart of a front suspension self-leveling method according to the present invention.

[0046] Figure 2 This is a schematic diagram of a front suspension self-leveling structure according to the present invention. Detailed Implementation

[0047] The following are specific embodiments of the present invention, which further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0048] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement of modules and structures set forth in these embodiments does not limit the scope of the invention.

[0049] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0050] Techniques, methods, and systems known to a person skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the license specification.

[0051] Example 1: As Figures 1 to 2The illustration shows only one embodiment of the present invention, a front suspension self-leveling method applicable to a front suspension self-leveling structure. The structure includes an upper beam 1 and a lower beam 2, with an adjustment unit and a buffer column 4 disposed between the upper beam 1 and the lower beam 2. The two adjustment units and buffer columns 4 are symmetrically arranged on the left and right sides. The adjustment unit includes a functional cylinder 32, a height rod 33 disposed on the upper beam 1 extending toward the lower beam 2, and a sensing valve 34 disposed on the lower beam 2 for obtaining the height of the height rod 33. A pressure sensor is disposed on the buffer column 4, and both the sensing valve 34 and the pressure sensor are electrically connected to the functional cylinder 32.

[0052] In the self-feedback adjustment structure of the front suspension of a truck according to the present invention, two adjustment units are respectively set at both ends of the front suspension, and two buffer columns 4 are also respectively set at both ends of the front suspension. The upper beam 1 and the lower beam 2 are arranged in parallel in the static state. The ends of the upper beam 1 and the lower beam 2 are connected by the buffer columns 4. The side of the buffer column 4 is provided with a height rod 33 and a sensing valve 34. The side of the functional cylinder 32 away from the buffer column 4 is provided with a height rod 33 and a sensing valve 34.

[0053] Here, the functional cylinder 32 is connected and disposed near the end of the upper beam 1 and the end of the lower beam 2; the functional cylinder 32 is disposed on the side of the buffer column 4 near the height rod 33; and the two sets of adjustment units on both sides of the front suspension and the buffer column 4 are symmetrically arranged.

[0054] The height rod 33 extends downwards, with its lower end at the same height as the sensing valve 34. The lower end of the height rod 33 is connected to the sensing valve via a hinged rod. When the cab descends towards the chassis, the end of the hinged rod away from the sensing valve 34 deflects downwards, blocking the lower sensing element of the sensing valve 34. The sensing valve 34 then knows that the cab has sunk and controls the function cylinder 32 to inflate, thereby lifting the upper beam 1 and causing the cab to rise accordingly. Conversely, when the cab rises away from the chassis, the end of the hinged rod away from the sensing valve 34 deflects upwards, blocking the upper sensing element of the sensing valve 34. The sensing valve 34 then knows that the cab has risen and controls the function cylinder 32 to deflate, thereby retracting the upper beam 1 and causing the cab to descend accordingly.

[0055] It should be noted that when the new energy truck is stationary and the cab is within the specified load range, the lower end of the height bar 33 is at the same height as the sensing valve 34. At this time, the cylinder is neither charged nor released. During the driving process, there will be bumps and swaying in the cab, which will cause the distance between the upper beam 1 and the lower beam 2 at the front suspension to change. At this time, the adjustment unit will make feedback adjustment.

[0056] The distance between the upper beam 1 and the lower beam 2 changes, including changes in the position of the lower beam 2 (chassis), such as potholes and bumps on the road; and changes in the position of the upper beam 1 (cab), such as when driving and turning, vehicle swaying, wind blowing, and road tilting, etc.

[0057] Furthermore, a pressure sensor is installed on the buffer column 4. The buffer column 4 is used to buffer the upper and lower beams. A buffer spring is installed at the buffer column 4. A pressure sensor is installed at the upper end of the buffer column 4 so that the pressure sensor can sense the pressure between the lower end of the buffer column 4 and the upper beam 1.

[0058] Both the pressure sensor and the sensing valve 34 are electrically connected to the functional cylinder 32. That is, the sensing valve 34 can sense the height of the height rod 33 (that is, the distance between the upper beam 1 and the lower beam 2) and then control the adjusting functional cylinder 32 to raise or lower, thereby buffering and adjusting the new energy truck. Alternatively, the pressure sensor can sense the pressure borne at the buffer column 4 and then control the adjusting functional cylinder 32 to raise or lower, thereby buffering and adjusting the new energy truck.

[0059] Ideally, both the pressure sensor and the sensing valve 34 should be electrically connected to the functional cylinder 32 via a controller. The controller can control the functional cylinder 32 to charge and release air by acquiring data from the pressure sensor and the sensing valve 34.

[0060] The method includes the following steps:

[0061] S1: Determine whether the truck is in a driving state. If yes, proceed to step S2; otherwise, do not perform the operation.

[0062] Only after the truck starts driving does it need to be balanced on both sides.

[0063] Only when a truck is driven will the side cushioning of the truck become abnormal when the truck goes over potholes and turns.

[0064] Of course, we are assuming that the driver has a high level of professional ability, which ensures that the truck is always parked on a relatively flat surface.

[0065] S2: The sensing valve obtains the height of the height rod in real time, so that when the height of the height rod is higher than a predetermined threshold, the functional cylinder releases air; and when the height of the height rod is lower than the predetermined threshold, the functional cylinder inflates air.

[0066] Before executing step S2, obtain the distance L between the functional cylinder and the height rod; since the structures on both sides are symmetrical, the distance between the left height rod and the left functional cylinder is the same as the distance between the right height rod and the right functional cylinder, which is L.

[0067] This ensures that during step S2,

[0068] The filling and discharging volume P of the functional cylinder is ΔH*L / a;

[0069] Where: ΔH is the difference between the height of the height bar (on the same side) and the predetermined threshold; a is the preset cargo loading coefficient value.

[0070] It is important to note that the initial height of the height bar can be understood as 0 (that is, when the vehicle is stationary on a level surface, the height of the height bar is approximately the same as the height of the sensing valve). When the height bar rises, the distance between the upper beam 1 and the lower beam 2 increases; when the height bar falls, the distance between the upper beam 1 and the lower beam 2 decreases. Also, ΔH will always be positive, but the direction of the height bar height (i.e., inflation or deflation) can be identified.

[0071] For example, when the height lever on the left rises, the functional cylinder on the left releases air, and the amount of air released, Pa, is ΔH*L / a. At this time, the functional cylinder drives the upper beam 1 to retract with the driving power of Pa. For example, when the height lever on the right falls, the functional cylinder on the right inflates, and the amount of air inflated, Pb, is ΔH*L / a. At this time, the second cylinder drives the upper beam 1 to rise with the driving power of P2.

[0072] S3: Determine whether the height difference between the two height bars is greater than the first predetermined difference value. If so, proceed to step S4; otherwise, do not perform the operation.

[0073] When performing step S2, it can be understood that the adjustment on one side is carried out independently; while when performing step S3 to determine the height difference between the two height rods, it is necessary to link the two sides of the structure together and adjust them in coordination.

[0074] If the height difference between the two height bars exceeds the first predetermined difference, it can be understood that there is a large gap between the upper and lower beams at both ends of the new energy truck. At this time, the balance on both sides of the truck will inevitably be broken, and balancing adjustment is required.

[0075] S4: Adjust the inflation and deflation of the two functional cylinders based on the pressure sensor values ​​of the two buffer columns.

[0076] Once the height difference between the two height rods exceeds the first predetermined difference, the two functional cylinders need to be balunned by charging or depressing according to the pressure sensor readings of the two buffer columns.

[0077] In summary, when the height difference between the two height rods is not greater than the first predetermined difference, the functional cylinder is regulated by the sensing valve to adjust the air supply and discharge, thereby completing the balance adjustment of the new energy vehicle; when the height difference between the two height rods is greater than the first predetermined difference, the functional cylinder is regulated by the sensing valve based on the pressure sensor reading, thereby completing the balance adjustment of the new energy vehicle.

[0078] Embodiment 3: Still as Figure 1 shown, which is only one embodiment of the present invention. Based on any of the above embodiments, in a front suspension self-trimming and leveling method of the present invention,

[0079] when performing step S4, it specifically includes:

[0080] S41: Determine whether the difference between the values of the two pressure sensors is greater than the second predetermined difference. If so, execute step S42; otherwise, perform primary charging and discharging adjustment on the two functional cylinders;

[0081] S42: Determine whether the values of the two pressure sensors are both not greater than the calibration threshold. If so, perform secondary charging and discharging adjustment on the two functional cylinders; otherwise, perform tertiary charging and discharging adjustment on the two functional cylinders.

[0082] Among them, when performing step S41, performing primary charging and discharging adjustment on the two functional cylinders specifically includes:

[0083] Performing charging and discharging adjustment on the two functional cylinders according to the values of the two pressure sensors, and the charging and discharging volume P11 of the functional cylinder on the side with the larger pressure sensor value is:

[0084] P11 = ΔH * L / a + T large * b;

[0085] The charging and discharging volume P21 of the functional cylinder on the side with the smaller pressure sensor value is:

[0086] P21 = ΔH * L / a + T small * b;

[0087] Among them, T large is the pressure sensor value on the side with the larger pressure sensor value, T small is the pressure sensor value on the side with the smaller pressure sensor value, and b is the preset pressure influence coefficient value.

[0088] In addition, when performing step S42, performing secondary charging and discharging adjustment on the two functional cylinders specifically includes:

[0089] Performing charging and discharging adjustment on the two functional cylinders according to the difference between the values of the two pressure sensors, and the charging and discharging volume P12 of the functional cylinder on the side with the larger pressure sensor value is:

[0090] P12 = ΔH * L / a + T large * b + (T large - T small) * c;

[0091] The charging and discharging volume P22 of the functional cylinder on the side with the smaller pressure sensor value is:

[0092] P22 = ΔH * L / a + T small * b - (T large - T small) * c;

[0093] Among them, c is the first preset trimming coefficient value.

[0094] In addition, when performing step S42, three-stage charging and discharging adjustment is performed on the two functional cylinders, specifically:

[0095] The charging and discharging of the two functional cylinders is adjusted according to the difference between the value of the pressure sensor and the calibrated threshold, and the charging and discharging volume P13 of the functional cylinder on the side with a larger pressure sensor value is:

[0096] P13 = ΔH * L / a + T large * b + (T large - T small) * c + (T large - T0) * d;

[0097] The charging and discharging volume P23 of the functional cylinder on the side with a smaller pressure sensor value is:

[0098] P23 = ΔH * L / a + T small * b - (T large - T small) * c + (T small - T0) * d;

[0099] Among them, d is the value of the second preset trimming coefficient; T0 is the calibrated threshold.

[0100] Example 3: Still as Figures 1 to 2 shown, it is only one of the embodiments of the present invention. Based on Embodiment 1, in a front suspension self-trimming and leveling method of the present invention,

[0101] Before performing the steps of the present invention, obtain the value of the truck load coefficient value a. In fact, in advance, according to the carrying capacity and vehicle parameters of the new energy truck, establish a value table of the corresponding truck load coefficient value a under different carrying masses, and at the beginning of the truck's transportation task, measure the carrying mass through a weighbridge, so as to be electrically connected to the weighbridge and the central control terminal, and obtain the truck load coefficient value a from the value table.

[0102] Similarly, it is also necessary to obtain the values of the preset pressure influence coefficient value b, the first preset trimming coefficient value c, and the second preset trimming coefficient value d in advance.

[0103] In the present invention, the number of the functional cylinders is at least one.

[0104] In the present invention, before performing step S3, establish the electrical connection of the two induction valves.

[0105] It should be noted that when performing step S4, after the charging and discharging adjustment of the two functional cylinders, return to perform step S2.

[0106] Finally, when performing step S4 and performing three-stage charging and discharging adjustment on the two functional cylinders, an alarm signal is issued.

[0107] This invention discloses a front suspension self-balancing method. In the front suspension assembly, two adjustment units on the left and right sides and a buffer column perform buffer adjustment on the front suspension. During driving, through the cooperation of the two adjustment units and the buffer column, the method effectively performs bilateral synchronous self-balancing for the special driving posture of new energy trucks with high torque and rapid acceleration and deceleration. This can effectively prevent trucks from overturning and improve ride comfort and safety.

[0108] This invention is not limited to the specific embodiments described above, and various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made to the above embodiments based on the technical essence of this invention should be included within the scope of protection of this invention.

Claims

1. A method for self-leveling and balancing a front suspension, characterized in that: Applicable to a front suspension self - leveling structure, the structure includes an upper beam (1) and a lower beam (2). An adjustment unit and a buffer column (4) are arranged between the upper beam (1) and the lower beam (2), and the two adjustment units and the buffer column (4) are symmetrically arranged left and right; the adjustment unit includes a functional cylinder (32), a height rod (33) arranged on the upper beam (1) and extending towards the lower beam (2), and an induction valve (34) arranged on the lower beam (2) for obtaining the height of the height rod (33). A pressure sensor is arranged on the buffer column (4), and both the induction valve (34) and the pressure sensor are electrically connected to the functional cylinder (32); The method includes the following steps: S1: Judge whether the truck is in a driving state. If so, execute step S2; otherwise, do not perform any operation; S2: The induction valve continuously obtains the height of the height rod, so that when the height of the height rod is higher than a predetermined threshold, the functional cylinder deflates; and when the height of the height rod is lower than the predetermined threshold, the functional cylinder inflates; S3: Judge whether the height difference between the two height rods is greater than a first predetermined difference. If so, execute step S4; otherwise, do not perform any operation; S4: Adjust the inflation and deflation of the two functional cylinders according to the values of the pressure sensors of the two buffer columns.

2. The self-leveling method for front suspension according to claim 1, characterized in that: Before executing step S2, obtain the distance L between the functional cylinder and the height rod; When executing step S2, The inflation and deflation volume P of the functional cylinder is ΔH*L / a; Where: ΔH is the difference between the height of the height rod and the predetermined threshold; a is a preset load coefficient value.

3. The self-leveling method for front suspension according to claim 2, characterized in that: When executing step S4, it specifically includes: S41: Judge whether the difference between the values of the two pressure sensors is greater than a second predetermined difference. If so, execute step S42; otherwise, perform a primary inflation and deflation adjustment on the two functional cylinders; S42: Judge whether the values of the two pressure sensors are both not greater than the calibration threshold. If so, perform a secondary inflation and deflation adjustment on the two functional cylinders; otherwise, perform a tertiary inflation and deflation adjustment on the two functional cylinders.

4. The self-leveling method for front suspension according to claim 3, characterized in that: When executing step S41, the primary inflation and deflation adjustment of the two functional cylinders is as follows: Adjust the inflation and deflation of the two functional cylinders according to the values of the two pressure sensors, and the inflation and deflation volume P11 of the functional cylinder on the side with the larger pressure sensor value is: P11 = ΔH*L / a + T large*b; The inflation and deflation volume P21 of the functional cylinder on the side with the smaller pressure sensor value is: P21 = ΔH*L / a + T small*b; Where, T large is the value of the pressure sensor on the side with the larger pressure sensor value, T small is the value of the pressure sensor on the side with the smaller pressure sensor value, and b is a preset pressure influence coefficient value.

5. The self-leveling method for front suspension according to claim 4, characterized in that: When executing step S42, the secondary inflation and deflation adjustment of the two functional cylinders is as follows: Adjust the inflation and deflation of the two functional cylinders according to the difference between the values of the two pressure sensors, and the inflation and deflation volume P12 of the functional cylinder on the side with the larger pressure sensor value is: P12 = ΔH*L / a + T large*b + (T large - T small)*c; The inflation and deflation volume P22 of the functional cylinder on the side with the smaller pressure sensor value is: P22 = ΔH*L / a + T small*b - (T large - T small)*c; Among them, c is the first preset trimming coefficient value.

6. The self-leveling method for front suspension according to claim 5, characterized in that: When performing step S42, three-level charging and discharging adjustment is performed on the two functional cylinders. Specifically: the charging and discharging of the two functional cylinders are adjusted according to the difference between the value of the pressure sensor and the calibration threshold, and the charging and discharging volume P13 of the functional cylinder on the side with a larger pressure sensor value is: P13 = ΔH * L / a + T large * b + (T large - T small) * c + (T large - T0) * d; The charging and discharging volume P23 of the functional cylinder on the side with a smaller pressure sensor value is: P23 = ΔH * L / a + T small * b - (T large - T small) * c + (T small - T0) * d; Among them, d is the second preset trimming coefficient value; T0 is the calibration threshold.

7. The self-leveling method for front suspension according to claim 1, characterized in that: The number of the functional cylinders is at least one.

8. The self-leveling method for front suspension according to claim 1, characterized in that: Before performing step S3, establish the electrical connection of the two induction valves.

9. The self-leveling method for a front suspension according to claim 1, characterized in that: When performing step S4, after performing the charging and discharging adjustment on the two functional cylinders, return to perform step S2.

10. A self-leveling method for a front suspension according to claim 3, characterized in that: When performing step S4 and performing three-level charging and discharging adjustment on the two functional cylinders, send out an alarm signal.

Images