Air suspension system adjusting method, device and automobile

Abstract

The present application relates to a kind of air suspension system adjusting method, device and car, air suspension system adjusting method includes according to preset design value control adjusting component to the height of each suspension in air suspension system is adjusted;Current four-wheel load is obtained, wherein, current four-wheel load indicates the weighing load of the four wheels of car;Determine whether current four-wheel load satisfies preset adjustment condition;If yes, then according to current four-wheel load control adjusting component to the height of each suspension is adjusted.In the embodiment of the present application, the height of each suspension is adjusted in the process of considering the vehicle posture and load distribution, so that the adjusted vehicle posture and load distribution can meet the design requirements, to realize the uniformity of vehicle posture and load distribution, so as to realize the performance balance of vehicle posture and load.

Description

Air suspension system adjustment methods, devices and automobiles Technical Field

[0001] This invention relates to the field of automotive technology, specifically to an air suspension system adjustment method, device, and automobile. Background Technology

[0002] Air suspension is a crucial device in automobiles, ensuring smooth driving and handling stability. The core component of air suspension is the air spring. Currently, air suspension adjustments primarily target the overall vehicle posture, aiming to maintain consistent suspension height on both sides. The specific height values ​​for the left and right suspensions are determined based on design specifications.

[0003] However, when the vehicle's attitude is properly adjusted, meaning the suspension heights on both sides are consistent, the uneven load distribution on the left and right wheels due to the vehicle's design load distribution leads to inconsistent air pressure and stiffness in the air springs on both sides, resulting in an imbalance in the air suspension performance. Conversely, when the load is controlled to be consistent on both sides, the air spring pressure will be consistent, causing the vehicle's attitude to exceed the design value, resulting in the air suspension being in a torsional state during the matching process. In summary, there is a problem of unbalanced vehicle attitude and load during air suspension adjustment. Summary of the Invention

[0004] One objective of this invention is to provide an air suspension system adjustment method to solve the technical problem that the vehicle's attitude and load cannot be balanced during air suspension adjustment in the prior art; another objective is to provide an air suspension system adjustment device; and a third objective is to provide an automobile.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] An air suspension system adjustment method, comprising:

[0007] The height of each suspension component in the air suspension system is adjusted according to the preset design value by the control and adjustment components.

[0008] Obtain the current four-wheel load, wherein the current four-wheel load represents the weighing load of the four wheels of the vehicle;

[0009] Determine whether the current load on the four wheels meets the preset adjustment conditions;

[0010] If so, the adjustment assembly is controlled to adjust the height of each suspension according to the current four-wheel load.

[0011] Based on the aforementioned technical means, after adjusting the height of each suspension in the air suspension system according to the preset design values, the height of each suspension will also be adjusted according to the current four-wheel load. That is, in addition to the preset design values, the height adjustment of each suspension is also based on the current four-wheel load. Thus, the adjustment of the height of each suspension takes into account the overall vehicle attitude and load distribution, so that the adjusted overall vehicle attitude and load distribution can meet the requirements, thereby achieving uniform overall vehicle attitude and load distribution, and thus achieving a performance balance between overall vehicle attitude and load, solving the problem of performance imbalance between attitude and load.

[0012] Furthermore, after the step of controlling the adjustment assembly to adjust the height of each suspension according to the current four-wheel load, the method further includes:

[0013] Obtain information on the load on the four wheels after adjustment and the height of the rear suspension after adjustment;

[0014] Determine whether the adjusted four-wheel load and the adjusted suspension height information meet the preset error conditions;

[0015] If so, output the verification result that meets the requirements.

[0016] Based on the aforementioned technical means, after the adjustment is completed, it can be determined whether the preset error conditions are met based on the adjusted four-wheel load and the adjusted suspension height information, so as to verify whether the adjustment of the air suspension system meets the requirements.

[0017] Furthermore, the current four-wheel load includes the current left front wheel load, the current right front wheel load, the current left rear wheel load, and the current right rear wheel load. The preset adjustment condition is that the absolute value of the first difference between the current left front wheel load and the current right front wheel load is greater than or equal to a first preset value, and the absolute value of the second difference between the current left rear wheel load and the current right rear wheel load is greater than or equal to the first preset value.

[0018] The determination of whether the current four-wheel load meets the preset adjustment conditions includes:

[0019] Determine whether the absolute value of the first difference between the current left front wheel load and the current right front wheel load is greater than or equal to the first preset value, and determine whether the absolute value of the second difference between the current left rear wheel load and the current right rear wheel load is greater than or equal to the first preset value.

[0020] According to the above technical means, if the absolute value of the first difference between the current left front wheel load and the current right front wheel load is greater than or equal to the first preset value, and the absolute value of the second difference between the current left rear wheel load and the current right rear wheel load is greater than or equal to the first preset value, it indicates that the left and right loads are significantly different and need to be adjusted, thus providing a basis for determining whether further adjustment is needed.

[0021] Furthermore, the adjustment assembly includes an air pump, an air tank connected to the air pump, an air spring assembly, and a deflation solenoid valve assembly, wherein the air tank is connected to the air spring assembly; the step of controlling the adjustment assembly to adjust the height of each suspension according to the current four-wheel load includes:

[0022] The inflation / deflation volume of the air spring assembly is determined based on the current four-wheel load.

[0023] The inflation pump is controlled to inflate the air spring assembly through the air storage tank according to the inflation / deflation volume, and the deflation solenoid valve assembly is controlled to open so that the air spring assembly deflates.

[0024] Based on the aforementioned technical means, the inflation and deflation volume of the air spring assembly is determined according to the current four-wheel load, thereby achieving the adjustment of the vehicle's posture based on the current four-wheel load.

[0025] Furthermore, the inflation / deflation volume includes the pre-inflation / deflation volume and the post-inflation / deflation volume. The pre-inflation / deflation volume is determined based on pre-inflation / deflation parameters, and the post-inflation / deflation volume is determined based on post-inflation / deflation parameters. The pre-inflation / deflation parameters and the post-inflation / deflation parameters are determined according to the following formula:

[0026] S1=|GFL1-GFR1| / 2 / K, S2=|GRL1-GRR1| / 2 / K

[0027] Wherein, S1 is the front inflation / deflation parameter, S2 is the rear inflation / deflation parameter, K is the design static stiffness of the air spring assembly, GFL1 is the current left front wheel load, GFR1 is the current right front wheel load, GRL1 is the current left rear wheel load, and GRR1 is the current right rear wheel load.

[0028] Based on the above technical means, the pre-charge and post-charge parameters are determined according to the formula, and the pre-charge and post-charge amounts are determined according to the pre-charge and post-charge parameters to ensure the optimal selection of the pre-charge and post-charge amounts.

[0029] Furthermore, the air spring assembly includes a left front air spring, a right front air spring, a left rear air spring, and a right rear air spring;

[0030] The step of controlling the air pump to inflate the air spring assembly through the air storage tank according to the inflation / deflation volume, and controlling the deflation solenoid valve assembly to open so as to deflate the air spring assembly includes:

[0031] When the current left front wheel load is less than the current right front wheel load, and the current right rear wheel load is less than the current left rear wheel load, the air pump is controlled to inflate the left front air spring through the air tank according to the front inflation / deflation amount, and the deflation solenoid valve assembly is controlled to open to deflate the right front air spring. Similarly, the air pump is controlled to inflate the right rear air spring through the air tank according to the rear inflation / deflation amount, and the deflation solenoid valve assembly is controlled to open to deflate the left rear air spring.

[0032] According to the above technical means, the air spring on the side with the lighter load is inflated, and the air spring on the side with the heavier load is deflated, thereby achieving the purpose of balancing the load distribution.

[0033] Further, the adjusted four-wheel load includes the adjusted left front wheel load, the adjusted right front wheel load, the adjusted left rear wheel load, and the adjusted right rear wheel load; the adjusted suspension height information includes the adjusted left front suspension height, the adjusted right front suspension height, the adjusted left rear suspension height, and the adjusted right rear suspension height; the step of determining whether the adjusted four-wheel load and the adjusted suspension height information meet the preset error conditions includes:

[0034] Determine whether the absolute value of the third difference between the adjusted left front wheel load and the adjusted right front wheel load is less than the second preset value, and determine whether the absolute value of the fourth difference between the adjusted left rear wheel load and the adjusted right rear wheel load is less than the second preset value;

[0035] Determine whether the adjusted left front suspension height and the adjusted right front suspension height are within a first preset range, and determine whether the adjusted left rear suspension height and the adjusted right rear suspension height are within a second preset range.

[0036] Based on the above technical means, a basis is provided for judging whether the information on adjusting the load of the rear four wheels and adjusting the rear suspension height meets the preset error conditions.

[0037] An air suspension system adjustment device includes an ECU, the ECU being used to execute the air suspension system adjustment method described in any of the preceding claims.

[0038] Furthermore, it also includes an operation input component, which is electrically connected to the ECU. The operation input component is used to accept the current four-wheel load input and send the current four-wheel load to the ECU.

[0039] Based on the above technical means, by setting the input component, the current load of the four wheels can be input, which makes it easier for the ECU to obtain the current load of the four wheels by operating the input component.

[0040] An automobile, the automobile comprising the air suspension system adjustment method described in any of the preceding claims.

[0041] The beneficial effects of this invention are:

[0042] After adjusting the height of each suspension in the air suspension system according to the preset design values, the height of each suspension is also adjusted according to the current four-wheel load. That is, the height adjustment of each suspension is based not only on the preset design values ​​but also on the current four-wheel load. Thus, the adjustment of the height of each suspension takes into account the overall vehicle attitude and load distribution, so that the adjusted overall vehicle attitude and load distribution can meet the requirements, thereby achieving uniform overall vehicle attitude and load distribution and realizing the performance balance of overall vehicle attitude and load, solving the problem of performance imbalance in attitude and load. Attached Figure Description

[0043] Figure 1 is a schematic flowchart of the steps of the air suspension system adjustment method provided in an embodiment of the present invention;

[0044] Figure 2 is a schematic flowchart of the air suspension system adjustment method provided in an embodiment of the present invention.

[0045] Figure 3 is a structural block diagram of the air suspension system adjustment device provided in an embodiment of the present invention;

[0046] Figure 4 is a partial structural schematic diagram of the air suspension system adjustment device provided in an embodiment of the present invention.

[0047] Among them, 1-ECU, 2-operation input component, 3-air pump, 4-air tank, 5-solenoid five-way valve, 6-left front air spring, 7-left front altimeter. Detailed Implementation

[0048] The embodiments of the present invention will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention and not for limiting the scope of protection of the present invention.

[0049] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0050] When there are differences in the design load of the vehicle on both sides, the uneven weight distribution will inevitably lead to an imbalance in load and attitude during the air suspension performance matching process. Even when the attitude is well controlled, the design load distribution of the vehicle means that the left and right wheels cannot be perfectly aligned, resulting in inconsistent air spring pressure and consequently, differences in air spring stiffness between the left and right wheels, leading to an imbalance in suspension performance. Conversely, when the load is controlled to be consistent on both sides, the air spring pressure will be consistent, potentially causing the attitude to exceed the design value, resulting in the suspension being in a torsional state during the matching process. To address these issues, this invention provides an air suspension system adjustment method, device, and vehicle.

[0051] In the first aspect, referring to FIG1, an embodiment of the present invention proposes an air suspension system adjustment method, which is mainly used in the debugging process before the automobile leaves the factory. Specifically, the method is applied to the ECU (Electronic Control Unit) 1 in the air suspension system adjustment device.

[0052] The air suspension system adjustment method includes:

[0053] Step 101: Adjust the height of each suspension in the air suspension system according to the preset design value by controlling the adjustment component.

[0054] Specifically, the car includes an air suspension system, which comprises four suspensions: a left front suspension, a right front suspension, a left rear suspension, and a right rear suspension. The preset design values ​​can be pre-stored in ECU1 or input via input component 2. The preset design values ​​include a first design value and a second design value. The first design value refers to the design height of the left and right front suspensions, and the second design value refers to the design height of the left and right rear suspensions. Different car models have different preset design values. For example, the first design value can be 225mm ± 5mm, preferably 225mm, with an allowable error of ± 5mm. The second design value can be 235mm ± 5mm, preferably 235mm, with an allowable error of ± 5mm.

[0055] Referring to Figures 3 and 4, the air suspension system adjustment device includes an adjustment assembly, which comprises an air pump 3, an air tank 4, a solenoid five-way valve 5, an air spring assembly, and a deflation solenoid valve assembly. The ECU 1 is electrically connected to the air pump 3, the solenoid five-way valve 5, and the deflation solenoid valve assembly, and can directly control these components. The solenoid five-way valve 5 connects the air tank 4 and the air spring assembly to allow air flow. The ECU 1 controls the operation of the air pump 3, the opening and closing of each valve in the solenoid five-way valve 5, and the opening and closing of the deflation solenoid valve assembly. The air spring assembly includes a left front air spring 6, a right front air spring, a left rear air spring, and a right rear air spring. The ECU 1 controls the air pump 3 to inflate the air spring assembly through the air tank 4 and the solenoid five-way valve 5, and controls the deflation solenoid valve assembly to open, thus deflating the air spring assembly. By controlling the inflation and deflation of the air spring assembly, the height of each suspension component can be adjusted. It should be noted that the connection between the air pump 3 and the air tank 4, the connection between the air tank 4 and the electromagnetic five-way valve 5, and the connection between the electromagnetic five-way valve 5 and the air spring assembly are not electrical connections, but are connected through pipelines.

[0056] When the first design value is 225mm, the heights of both the left and right front suspensions can be adjusted to 225mm based on this value. When the second design value is 235mm, the heights of both the left and right rear suspensions can be adjusted to 235mm based on this value. The air suspension system adjustment device also includes a left front height gauge 7, a right front height gauge, a left rear height gauge, and a right rear height gauge. The left front height gauge 7 measures the height of the left front suspension, the right front height gauge measures the height of the right front suspension, the left rear height gauge measures the height of the left rear suspension, and the right rear height gauge measures the height of the right rear suspension. All four height gauges can be mounted on the vehicle's control arms to monitor the vehicle's attitude. The heights of the left front suspension, right front suspension, left rear suspension, and right rear suspension specifically represent the distances from the left and right sill rails of the front suspension to the ground, and the distances of the left and right sill rails of the rear suspension to the ground, respectively.

[0057] These four altimeters are all electrically connected to ECU1, and the data measured by the four altimeters can be used to confirm whether the height adjustment of each suspension in the air suspension system is in place. For example, between step 101 and step 102, the heights of the left front suspension, right front suspension, left rear suspension, and right rear suspension can be represented by FL1, FR1, RL1, and RR1, respectively. FL1 = 225mm, FR1 = 225mm, RL1 = 235mm, and RR1 = 235mm indicate that the height adjustment of each suspension in the air suspension system is in place.

[0058] Step 102: Obtain the current load on all four wheels.

[0059] The current four-wheel load refers to the weighing load of the four wheels of the vehicle. Specifically, the current four-wheel load includes the current left front wheel load, current right front wheel load, current left rear wheel load, and current right rear wheel load. The units for these loads are all kg. The weighing load of the four wheels can be measured by adjusting the weighing platform. The air suspension system adjustment device also includes an operation input component 2, which is electrically connected to the ECU1. This operation input component 2 includes a display screen, i.e., it has a display function, and it also supports touch input. This operation input component 2 can be the vehicle's infotainment system. The operation input component 2 is mainly used as an input port for the actual weighing load of the four wheels of the vehicle during vehicle adjustment, and it is the port for inputting data in this air suspension system adjustment method. After measuring the weighing load of the four wheels, the current four-wheel load can be input through the operation input component 2, and then the ECU1 can obtain the current four-wheel load through the operation input component 2.

[0060] Step 103: Determine whether the current load on the four wheels meets the preset adjustment conditions.

[0061] Specifically, the preset adjustment conditions can be that the absolute value of the first difference between the current left front wheel load and the current right front wheel load is greater than or equal to a first preset value, and the absolute value of the second difference between the current left rear wheel load and the current right rear wheel load is greater than or equal to the first preset value. The first preset value can be set according to adjustment needs, such as 20 kg. If the current load of the four wheels meets the preset adjustment conditions, it means that the difference between the left and right loads is large and adjustment is required. If the current load of the four wheels does not meet the preset adjustment conditions, it means that the difference between the left and right loads is within the error range and no further adjustment is required.

[0062] For example, the current left front wheel load, current right front wheel load, current left rear wheel load, and current right rear wheel load can be represented by GFL1, GFR1, GRL1, and GRR1, respectively. When the first preset value is 20kg, if the values ​​of GFL1, GFR1, GRL1, and GRR1 input through the operation input component 2 are GFL1 = 530kg, GFR1 = 580kg, GRL1 = 630kg, and GRR1 = 580kg, then the current load of the four wheels meets the preset adjustment conditions.

[0063] Step 104: If so, adjust the height of each suspension according to the current four-wheel load control adjustment component.

[0064] Specifically, if the current four-wheel load meets the preset adjustment conditions, the height of each suspension is adjusted according to the current four-wheel load control adjustment component to achieve the purpose of balancing load distribution.

[0065] In this embodiment of the invention, after adjusting the height of each suspension in the air suspension system according to the preset design value, the height of each suspension is also adjusted according to the current four-wheel load. That is, the adjustment of the height of each suspension is based not only on the preset design value but also on the current four-wheel load. Thus, the adjustment of the height of each suspension takes into account the overall vehicle attitude and load distribution, so that the adjusted overall vehicle attitude and load distribution can meet the requirements, thereby achieving uniform overall vehicle attitude and load distribution and realizing the performance balance of overall vehicle attitude and load, solving the problem of performance imbalance in attitude and load.

[0066] Referring to Figure 2, after step 104, which involves adjusting the height of each suspension component based on the current four-wheel load control adjustment assembly, the following method is also included:

[0067] Step 105: Obtain the adjusted four-wheel load and the adjusted rear suspension height information.

[0068] Specifically, adjusting the load on the four rear wheels includes adjusting the load on the left front wheel, the right front wheel, the left rear wheel, and the right rear wheel. The units for these load adjustments are all in kg. After adjusting the height of each suspension component according to the current four-wheel load control adjustment component in step 104, the weighing load of the four wheels after adjustment in step 104 can be measured using a weighing platform. After measuring the weighing load of the four wheels, the adjusted four-wheel load can be input through the input component 2. Then, ECU1 can obtain the adjusted four-wheel load through the input component 2.

[0069] The adjusted suspension height information includes the adjusted left front suspension height, adjusted right front suspension height, adjusted left rear suspension height, and adjusted right rear suspension height. The units for these heights are all in mm. The adjusted left front suspension height, adjusted right front suspension height, adjusted left rear suspension height, and adjusted right rear suspension height can be measured using the left front height gauge, right front height gauge, left rear height gauge, and right rear height gauge, respectively.

[0070] Step 106: Determine whether the adjusted four-wheel load and the adjusted suspension height information meet the preset error conditions.

[0071] Specifically, the preset error conditions include: the absolute value of the third difference between the adjusted left front wheel load and the adjusted right front wheel load is less than the second preset value; the absolute value of the fourth difference between the adjusted left rear wheel load and the adjusted right rear wheel load is less than the second preset value; the adjusted left front suspension height and the adjusted right front suspension height are within the first preset range; and the adjusted left rear suspension height and the adjusted right rear suspension height are within the second preset range. The second preset value can be the same as the first preset value, for example, the second preset value can be 20kg, the first preset range can be 225mm±5mm, and the second preset range can be 235mm±5mm. In other words, the preset error conditions refer to the vehicle's attitude error being within ±5mm of the design value, and the difference in load distribution between the left and right sides being within 20kg.

[0072] Step 107: If yes, output the verification result that meets the requirements.

[0073] Specifically, if the adjusted four-wheel load and rear suspension height information meet the preset error conditions, a verification result indicating successful adjustment is output, signifying compliance with requirements. This verification result can be output via input component 2 and can be a text message. If the adjusted four-wheel load and rear suspension height information do not meet the preset error conditions, a verification result indicating failure is output. In this case, the adjustment can be restarted from step 101 or step 102 until the adjusted four-wheel load and rear suspension height information meet the preset error conditions.

[0074] It should be noted that after step 107, a professional real-vehicle verification is required to ensure that no performance problems occur when the vehicle is put on the road, thereby achieving the best suspension tuning state for the entire vehicle.

[0075] In this embodiment of the invention, after the adjustment is completed, it can be determined whether the preset error conditions are met based on the adjusted four-wheel load and the adjusted suspension height information, so as to verify whether the adjustment of the air suspension system meets the requirements.

[0076] In this embodiment of the invention, by actively intervening in the adjustment of the vehicle's posture, the vehicle's posture error is ensured to be within ±5mm of the design value, and the difference in load distribution between the left and right sides is within 20kg, thereby achieving uniform posture and load distribution. This ensures that both the vehicle's posture and load distribution are within the design-allowed error range, achieving the goal of balancing performance and overall vehicle design.

[0077] The current four-wheel load includes the current left front wheel load, the current right front wheel load, the current left rear wheel load, and the current right rear wheel load; determining whether the current four-wheel load meets the preset adjustment conditions includes: determining whether the absolute value of the first difference between the current left front wheel load and the current right front wheel load is greater than or equal to the first preset value, and determining whether the absolute value of the second difference between the current left rear wheel load and the current right rear wheel load is greater than or equal to the first preset value.

[0078] Specifically, the first preset value can be 20kg. Both the absolute value of the first difference and the absolute value of the second difference are greater than or equal to 0. The absolute value of the first difference specifically refers to the absolute value of the difference between the current load on the left front wheel and the current load on the right front wheel, and the absolute value of the second difference specifically refers to the absolute value of the difference between the current load on the left rear wheel and the current load on the right rear wheel. Determining whether the absolute value of the first difference between the current load on the left front wheel and the current load on the right front wheel is greater than or equal to the first preset value is specifically expressed as |GFL1-GFR1|≥20kg. Determining whether the absolute value of the second difference between the current load on the left rear wheel and the current load on the right rear wheel is greater than or equal to the first preset value is specifically expressed as |GRL1-GRR1|≥20kg.

[0079] In addition, the preset adjustment conditions also include a first absolute value of the difference between the current left front wheel load and the current right front wheel load being less than or equal to 100 kg, and a second absolute value of the difference between the front left rear wheel load and the current right rear wheel load being less than or equal to 100 kg.

[0080] In this embodiment of the invention, if the absolute value of the first difference between the current left front wheel load and the current right front wheel load is greater than or equal to the first preset value, and the absolute value of the second difference between the current left rear wheel load and the current right rear wheel load is greater than or equal to the first preset value, it indicates that the left and right loads are significantly different and need to be adjusted, thus providing a basis for determining whether further adjustment is necessary.

[0081] The adjustment assembly includes an air pump 3, an air tank 4 connected to the air pump 3, an air spring assembly, and a deflation solenoid valve assembly. The air tank 4 is connected to the air spring assembly. The adjustment assembly adjusts the height of each suspension component according to the current four-wheel load, including: determining the inflation / deflation amount of the air spring assembly based on the current four-wheel load; controlling the air pump 3 to inflate the air spring assembly through the air tank 4 based on the inflation / deflation amount; and controlling the deflation solenoid valve assembly to open, thereby deflating the air spring assembly.

[0082] Specifically, the adjustment assembly also includes a solenoid five-way valve 5. The ECU 1 is electrically connected to the air pump 3, the solenoid five-way valve 5, and the deflation solenoid valve assembly. The ECU 1 can directly control the air pump 3, the solenoid five-way valve 5, and the deflation solenoid valve assembly. The solenoid five-way valve 5 connects the air tank 4 and the air spring assembly to allow gas flow. The ECU 1 can control the air pump 3 to inflate the air tank 4, and simultaneously, the ECU 1 controls the valve in the solenoid five-way valve 5 to open, so that the air tank 4 inflates the air spring assembly. In this embodiment of the invention, the inflation and deflation volume of the air spring assembly is determined based on the current four-wheel load, thereby achieving adjustment of the vehicle's attitude based on the current four-wheel load.

[0083] The inflation / deflation volume includes the pre-inflation / deflation volume and the post-inflation / deflation volume. The pre-inflation / deflation volume is determined based on the pre-inflation / deflation parameters, and the post-inflation / deflation volume is determined based on the post-inflation / deflation parameters. The pre-inflation / deflation parameters and the post-inflation / deflation parameters are determined according to the following formula:

[0084] S1=|GFL1-GFR1| / 2 / K, S2=|GRL1-GRR1| / 2 / K

[0085] Wherein, S1 is the front inflation / deflation parameter, S2 is the rear inflation / deflation parameter, K is the design static stiffness of the air spring assembly, GFL1 is the current left front wheel load, GFR1 is the current right front wheel load, GRL1 is the current left rear wheel load, and GRR1 is the current right rear wheel load.

[0086] Specifically, the pre-charge / de-air volume corresponds to the pre-charge / de-air parameters, which can be pre-calibrated or determined according to a correspondence table. Similarly, the post-charge / de-air volume corresponds to the post-charge / de-air parameters, which can also be pre-calibrated or determined according to a correspondence table. K specifically represents the design static stiffness of any air spring in the air spring assembly, and can be 50 N / m. In this embodiment of the invention, the pre-charge / de-air parameters and post-charge / de-air parameters are determined according to this formula, and the pre-charge / de-air volume and post-charge / de-air volume are determined based on these parameters to ensure optimal selection of the pre-charge / de-air volume and post-charge / de-air volume.

[0087] The air spring assembly includes a front left air spring, a front right air spring, a rear left air spring, and a rear right air spring.

[0088] The inflation pump is controlled to inflate the air spring assembly through the air tank according to the inflation / deflation volume, and the deflation solenoid valve assembly is controlled to open to deflate the air spring assembly, including:

[0089] When the current load on the left front wheel is less than the current load on the right front wheel, and the current load on the right rear wheel is less than the current load on the left rear wheel, the air pump is controlled to inflate the left front air spring through the air tank according to the front inflation / deflation amount, and the deflation solenoid valve assembly is controlled to open so that the right front air spring deflates. Similarly, the air pump is controlled to inflate the right rear air spring through the air tank according to the rear inflation / deflation amount, and the deflation solenoid valve assembly is controlled to open so that the left rear air spring deflates.

[0090] Specifically, when GFL1 = 530kg, GFR1 = 580kg, GRL1 = 630kg, and GRR1 = 580kg (i.e., the current load on the left front wheel is less than the current load on the right front wheel, and the current load on the right rear wheel is less than the current load on the left rear wheel), ECU1 controls the air pump 3 to inflate the air tank 4. Simultaneously, ECU1 controls the valve in the solenoid five-way valve 5 to open, allowing the air tank 4 to inflate the left front air spring and the right rear air spring. At this time, the right front air spring and the left rear air spring release air in a balanced manner. The amount of air inflated by the air tank 4 into the left front air spring is equal to the amount of air released into the right front air spring, and both are equal to the front-inflation / release volume. Similarly, the amount of air inflated by the air tank 4 into the right rear air spring is equal to the amount of air released into the left rear air spring, and both are equal to the rear-inflation / release volume. The venting solenoid valve assembly includes left front venting solenoid valves, right front venting solenoid valves, left rear venting solenoid valves, and right rear venting solenoid valves, respectively corresponding to the left front air spring, right front air spring, left rear air spring, and right rear air spring. Specifically, controlling the opening of the right front venting solenoid valve releases air from the right front air spring. Similarly, controlling the opening of the left rear venting solenoid valve releases air from the left rear air spring.

[0091] In this embodiment of the invention, the air spring on the side with the lighter load on the left and right sides is inflated, while the air spring on the side with the heavier load on the left and right sides is deflated, thereby achieving the purpose of balancing the load distribution.

[0092] The adjustment of the four-wheel load includes the adjustment of the rear left front wheel load, the adjustment of the rear right front wheel load, the adjustment of the rear left rear wheel load, and the adjustment of the rear right rear wheel load. The adjustment of the rear suspension height information includes the adjustment of the rear left front suspension height, the adjustment of the rear right front suspension height, the adjustment of the rear left rear suspension height, and the adjustment of the rear right rear suspension height.

[0093] Determine whether the adjusted four-wheel load and the adjusted suspension height information meet the preset error conditions, including:

[0094] Determine whether the absolute value of the third difference between the adjusted left front wheel load and the adjusted right front wheel load is less than the second preset value, and determine whether the absolute value of the fourth difference between the adjusted left rear wheel load and the adjusted right rear wheel load is less than the second preset value.

[0095] Determine whether the adjusted left front suspension height and the adjusted right front suspension height are within the first preset range, and determine whether the adjusted left rear suspension height and the adjusted right rear suspension height are within the second preset range.

[0096] Specifically, the preset error conditions include: the absolute value of the third difference between the adjusted left front wheel load and the adjusted right front wheel load is less than the second preset value; the absolute value of the fourth difference between the adjusted left rear wheel load and the adjusted right rear wheel load is less than the second preset value; the adjusted left front suspension height and the adjusted right front suspension height are within the first preset range; and the adjusted left rear suspension height and the adjusted right rear suspension height are within the second preset range. The second preset value can be the same as the first preset value, for example, the second preset value can be 20kg, the first preset range can be 225mm±5mm, and the second preset range can be 235mm±5mm. In other words, the preset error conditions refer to the vehicle's attitude error being within ±5mm of the design value, and the difference in load distribution between the left and right sides being within 20kg.

[0097] The absolute values ​​of the third and fourth differences are both greater than or equal to 0. Specifically, the absolute value of the third difference refers to the absolute value of the difference between the adjusted load on the left front wheel and the adjusted load on the right front wheel, and the absolute value of the fourth difference refers to the absolute value of the difference between the adjusted load on the left rear wheel and the adjusted load on the right rear wheel. The adjusted loads on the left front wheel, right front wheel, left rear wheel, and right rear wheel can be represented by GFL2, GFR2, GRL2, and GRR2, respectively.

[0098] The determination of whether the absolute value of the third difference between the adjusted left front wheel load and the adjusted right front wheel load is less than the second preset value is specifically expressed as |GFL2 - GFR2| < 20 kg. The determination of whether the absolute value of the fourth difference between the adjusted left rear wheel load and the adjusted right rear wheel load is less than the second preset value is specifically expressed as |GRL2 - GRR2| < 20 kg. For example, if the values ​​of GFL2, GFR2, GRL2, and GRR2 measured by the weighing platform are GFL2 = 555 kg, GFR1 = 555 kg, GRL1 = 605 kg, and GRR1 = 605 kg, then the adjusted loads of the four wheels meet the preset error conditions.

[0099] The adjusted left front suspension height, right front suspension height, left rear suspension height, and right rear suspension height can be represented by FL2, FR2, RL2, and RR2, respectively. With a first preset range of 225mm ± 5mm and a second preset range of 235mm ± 5mm, if the values ​​of FL2, FR2, RL2, and RR2 obtained by the four altimeters are FL2 = 230mm, FR2 = 220mm, RL2 = 230mm, and RL2 = 240mm, respectively, then the adjusted suspension height information meets the preset error conditions.

[0100] It is understood that the above examples are merely examples listed to better understand the technical solutions of the embodiments of the present invention, and are not intended to be the only limitation on the embodiments of the present invention.

[0101] Secondly, referring to Figures 3 and 4, the present invention provides an air suspension system adjustment device, which includes an ECU 1 for executing any of the air suspension system adjustment methods described in the first aspect above. Since the ECU 1 is used to execute the aforementioned air suspension system adjustment method, it also possesses the beneficial effects of the aforementioned air suspension system adjustment method.

[0102] The air suspension system adjustment device provided in this embodiment of the invention further includes an operation input component 2, which is electrically connected to the ECU1. The operation input component 2 is used to receive the current four-wheel load input and send the current four-wheel load to the ECU1. In this embodiment of the invention, by setting the operation input component 2, the current four-wheel load input can be realized, thereby facilitating the ECU1 to obtain the current four-wheel load through the operation input component 2.

[0103] The air suspension system adjustment device also includes an adjustment assembly, which comprises an air pump 3, an air tank 4, a solenoid five-way valve 5, an air spring assembly, and a deflation solenoid valve assembly. The ECU is electrically connected to the air pump 3, the solenoid five-way valve 5, and the deflation solenoid valve assembly, and the ECU1 can directly control the air pump 3, the solenoid five-way valve 5, and the deflation solenoid valve assembly. The air spring assembly includes a left front air spring 6, a right front air spring, a left rear air spring, and a right rear air spring. The air suspension system adjustment device also includes an altitude gauge assembly, which comprises a left front altitude gauge 7, a right front altitude gauge, a left rear altitude gauge, and a right rear altitude gauge.

[0104] Thirdly, the present invention provides an automobile that includes the air suspension system adjustment device according to any of the methods described in the second aspect above. Since the automobile includes the aforementioned air suspension system adjustment device, it also possesses the beneficial effects of the aforementioned air suspension system adjustment device. The automobile provided by the embodiments of the present invention includes various structures of the air suspension system adjustment device from any of the above embodiments; to avoid repetition, these will not be described again here.

[0105] The above embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention.

Claims

1. A method for adjusting an air suspension system, characterized in that, include: The system adjusts the height of each suspension component in the air suspension system according to preset design values; it acquires the current four-wheel load, which represents the weighed load of the four wheels of the vehicle; it determines whether the current four-wheel load meets preset adjustment conditions; if so, it controls the adjustment component to adjust the height of each suspension component according to the current four-wheel load; wherein the current four-wheel load includes the current left front wheel load, the current right front wheel load, the current left rear wheel load, and the current right rear wheel load, and the preset adjustment conditions are the current left front wheel load and the current right front wheel load... The first absolute value of the difference between the loads is greater than or equal to a first preset value, and the second absolute value of the difference between the current left rear wheel load and the current right rear wheel load is greater than or equal to the first preset value; determining whether the current four-wheel load meets the preset adjustment conditions includes: determining whether the first absolute value of the difference between the current left front wheel load and the current right front wheel load is greater than or equal to the first preset value, and determining whether the second absolute value of the difference between the current left rear wheel load and the current right rear wheel load is greater than or equal to the first preset value; the adjustment component includes an air pump, and the air pump... The system includes an air pump connected to an air tank, an air spring assembly, and a deflation solenoid valve assembly. The air tank is connected to the air spring assembly. The step of controlling the adjustment assembly to adjust the height of each suspension component based on the current four-wheel load includes: determining the inflation / deflation amount of the air spring assembly based on the current four-wheel load; controlling the air pump to inflate the air spring assembly through the air tank based on the inflation / deflation amount, and controlling the deflation solenoid valve assembly to open to deflate the air spring assembly; the inflation / deflation amount includes a front inflation / deflation amount and a rear inflation / deflation amount, the front inflation / deflation amount being based on... The rear inflation / deflation volume is determined based on the front inflation / deflation parameters. The front inflation / deflation parameters and the rear inflation / deflation parameters are determined according to the following formulas: S1=|GFL1-GFR1| / 2 / K, S2=|GRL1-GRR1| / 2 / K, where S1 is the front inflation / deflation parameter, S2 is the rear inflation / deflation parameter, K is the design static stiffness of the air spring assembly, GFL1 is the current left front wheel load, GFR1 is the current right front wheel load, GRL1 is the current left rear wheel load, and GRR1 is the current right rear wheel load.

2. The air suspension system adjustment method according to claim 1, characterized in that, After the step of controlling the adjustment component to adjust the height of each suspension according to the current four-wheel load, the method further includes: obtaining the adjusted four-wheel load and the adjusted suspension height information; determining whether the adjusted four-wheel load and the adjusted suspension height information meet the preset error conditions; if so, outputting the verification result that meets the requirements.

3. The air suspension system adjustment method according to claim 1, characterized in that, The air spring assembly includes a left front air spring, a right front air spring, a left rear air spring, and a right rear air spring. The step of controlling the air pump to inflate the air spring assembly through the air tank according to the inflation / deflation volume, and controlling the deflation solenoid valve assembly to open to deflate the air spring assembly, includes: when the current left front wheel load is less than the current right front wheel load, and the current right rear wheel load is less than the current left rear wheel load, controlling the air pump to inflate the left front air spring through the air tank according to the front inflation / deflation volume, and controlling the deflation solenoid valve assembly to open to deflate the right front air spring; and controlling the air pump to inflate the right rear air spring through the air tank according to the rear inflation / deflation volume, and controlling the deflation solenoid valve assembly to open to deflate the left rear air spring.

4. The air suspension system adjustment method according to claim 2, characterized in that, The adjusted four-wheel load includes the adjusted left front wheel load, the adjusted right front wheel load, the adjusted left rear wheel load, and the adjusted right rear wheel load. The adjusted suspension height information includes the adjusted left front suspension height, the adjusted right front suspension height, the adjusted left rear suspension height, and the adjusted right rear suspension height. The step of determining whether the adjusted four-wheel load and the adjusted suspension height information meet the preset error conditions includes: determining whether the absolute value of the third difference between the adjusted left front wheel load and the adjusted right front wheel load is less than a second preset value, and determining whether the absolute value of the fourth difference between the adjusted left rear wheel load and the adjusted right rear wheel load is less than the second preset value; determining whether the adjusted left front suspension height and the adjusted right front suspension height are within a first preset range, and determining whether the adjusted left rear suspension height and the adjusted right rear suspension height are within a second preset range.

5. An air suspension system adjustment device, characterized in that, Includes an ECU, which is used to perform the air suspension system adjustment method according to any one of claims 1-4.

6. The air suspension system adjustment device according to claim 5, characterized in that, It also includes an operation input component, which is electrically connected to the ECU. The operation input component is used to accept the current four-wheel load input and send the current four-wheel load to the ECU.

7. A car, characterized in that, The vehicle includes the air suspension system adjustment device as described in claim 5 or 6.

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