A method and device for controlling inflation pressure of air suspension line

Abstract

The present invention discloses a control method and device for inflation pressure on an air suspension line, and relates to the field of automobile manufacturing. The method includes inflating the air spring of a vehicle based on an input set pressure value; detecting the pressure value of the air spring, and obtaining the pressure value of the air spring based on the detection: if the pressure value is greater than the maximum pressure value obtained based on the set pressure value, adjusting the pressure of the air spring to the set pressure value, and twisting it to the detection line, and calibrating the height sensor; if the pressure value is less than the minimum pressure value obtained based on the set pressure value, adjusting the pressure of the air spring to the set pressure value, and twisting it to the detection line, and calibrating the height sensor; if the pressure value is within the range of the minimum pressure value to the maximum pressure value, twisting the vehicle to the detection line, and calibrating the height sensor. The present invention can effectively improve the success rate of height sensor calibration, save the time spent on height sensor calibration, and effectively improve vehicle production efficiency.

Description

Technical Field

[0001] The invention relates to the field of automobile manufacturing, and in particular to a method and a device for controlling the inflation pressure of an air suspension line. Background Art

[0002] Vehicles equipped with air suspension have an additional height sensor calibration process to eliminate height sensor assembly errors when passing the inspection line compared to vehicles equipped with coil springs. To ensure the accuracy of height sensor calibration, the initial calibration height of the vehicle is required to be within ±Amm (A=20 is generally set) relative to the design height when the vehicle rolls off the line. If it is not within ±Amm, the height sensor calibration is considered to have failed. Currently, vehicles equipped with air suspension are becoming more and more popular among the public. A high proportion of vehicles equipped with air suspension represent a large beat pressure. Ensuring that vehicles equipped with air suspension pass the inspection line once is an important means to reduce beat pressure.

[0003] Due to the stress caused by the friction of new car parts, the large inflation pressure error of the production line inflation equipment, and the normal leakage of the air spring after long-term repair, the initial calibration height of some vehicles is not within ±Amm relative to the design height when the vehicle is off the line, resulting in the failure of the vehicle height sensor calibration. The current height sensor calibration process is as follows:

[0004] 1. The production line equipment inflates the air spring according to the input pressure value Bbar. When the pressure value of the air spring reaches Bbar±0.2bar, the inflation is stopped;

[0005] 2. The vehicle is twisted to the detection line and enters the height sensor calibration station;

[0006] 3. The detection line calibration equipment transmits the measured height value from the wheel center to the wheel eyebrow to the air suspension controller;

[0007] 4. The air suspension controller calculates whether the vehicle's initial calibrated height is within ±Amm relative to the design height based on the wheel center to wheel eyebrow height value transmitted by the equipment;

[0008] 5. If the initial calibration height of the vehicle is within ±Amm relative to the design height, the height sensor calibration is carried out and the calibration is successful; if the initial calibration height of the vehicle is not within ±Amm relative to the design height, the feedback height sensor calibration fails, and the vehicle is returned to the repair area to adjust the initial calibration height of the vehicle to be within ±Amm relative to the design height, and then the height sensor is re-calibrated on the test line until the calibration is successful.

[0009] The existing calibration method has the following problems: the inflation equipment can only guarantee an inflation error of ±0.2 bar due to hardware capabilities, and different suspension structures cause a pressure of 0.1 bar to affect the height from the wheel center to the fender by ±8mm or even more, resulting in a height change of ±16mm due to ±0.2bar; at the same time, some repaired vehicles will have air leakage (the standard is generally within 3mm / 24h) when parked for a long time, and vehicles parked for more than 24 hours, coupled with the stress of new vehicles and new parts, will not have a height within ±Amm when they are offline, resulting in calibration failure, which ultimately requires a lot of time to repair, inflate and adjust the vehicle body height, and re-calibrate through the inspection line, which is time-consuming and labor-intensive, and reduces vehicle production efficiency. Summary of the invention

[0010] In view of the defects existing in the prior art, the purpose of the present invention is to provide a method and device for controlling the inflation pressure on the air suspension line, which can effectively improve the success rate of height sensor calibration, save the time spent on height sensor calibration, and effectively improve vehicle production efficiency.

[0011] In order to achieve the above object, the present invention provides a method for controlling the inflation pressure of an air suspension line, which specifically comprises the following steps:

[0012] Based on the input set pressure value, the production line equipment inflates the vehicle's air spring and twists the inflated vehicle to the electrical inspection station;

[0013] The air suspension controller detects the pressure value of the air spring and obtains the pressure value of the air spring based on the detection:

[0014] If the pressure value is greater than the maximum pressure value based on the set pressure value, adjust the pressure of the air spring to the set pressure value, twist the vehicle to the detection line, and calibrate the height sensor;

[0015] If the pressure value is less than the minimum pressure value obtained based on the set pressure value, adjust the pressure of the air spring to the set pressure value, twist the vehicle to the detection line, and calibrate the height sensor;

[0016] If the pressure value is within the range from the minimum pressure value to the maximum pressure value, directly twist the vehicle to the detection line to calibrate the height sensor.

[0017] On the basis of the above technical solution, the production line equipment inflates the air spring of the vehicle based on the input set pressure value, and twists the inflated vehicle to the electrical inspection station. The specific steps include:

[0018] Based on the input set pressure value, the production line equipment inflates the vehicle's air spring and detects the pressure of the inflated air spring in real time;

[0019] When it is detected that the pressure value of the air spring is within the pressure value range obtained based on the set pressure value and the first error value, the inflation of the air spring is stopped, and the inflated vehicle is twisted to the electrical inspection station.

[0020] On the basis of the above technical solution, the pressure value of the air spring is detected by the air suspension controller, and the specific steps include:

[0021] Control the air suspension controller to write the vehicle VIN code and configuration word before other controllers, and reset the air suspension controller;

[0022] When the vehicle VIN code and configuration word are written into the air suspension controller and the air suspension controller is reset, the air suspension controller detects the pressure value of the air spring based on the feedback from the pressure sensor.

[0023] Based on the above technical solutions,

[0024] The maximum pressure value is obtained according to the sum of the set pressure value and the second error value;

[0025] The minimum pressure value is obtained according to the difference between the set pressure value and the second error value.

[0026] On the basis of the above technical solution, if the pressure value is greater than the maximum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, specifically:

[0027] If the pressure value of the air spring is greater than the maximum pressure value, the air suspension controller will deflate the air suspension to the set pressure value through the bleed valve and according to the feedback from the pressure sensor.

[0028] On the basis of the above technical solution, if the pressure value is less than the minimum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, specifically:

[0029] If the pressure value of the air spring is less than the minimum pressure value, the air suspension controller controls the air pump and inflates the air suspension to the set pressure value based on the feedback from the pressure sensor.

[0030] On the basis of the above technical solution, the height sensor calibration is performed, and the specific steps include:

[0031] Twist the vehicle to the test line and enter the height sensor calibration station;

[0032] The height value from the wheel center to the wheel eyebrow is detected, and the detected height value is sent to the air suspension controller through the detection line calibration equipment;

[0033] Based on the height from the wheel center to the wheel arch, the difference between the initial height of the vehicle and the design height is calculated;

[0034] It is determined whether the calculated difference is within the set error range. If so, the height sensor is calibrated successfully. If not, it indicates that the height sensor calibration has failed.

[0035] On the basis of the above technical solution, when the height sensor calibration fails, it also includes:

[0036] The vehicle is returned to the repair area for adjustment, and the difference between the initial calibration height of the vehicle and the design height is adjusted to be within the set error range, and then the height sensor is recalibrated.

[0037] The present invention provides a control device for inflation pressure of an air suspension line, comprising:

[0038] The charging module is used to drive the production line equipment to inflate the air spring of the vehicle based on the input set pressure value, and then drive the torsion module to work;

[0039] A detection module is used to drive the air suspension controller to detect the pressure value of the air spring, and obtain the pressure value of the air spring based on the detection. If the pressure value is greater than the maximum pressure value obtained based on the set pressure value, the first execution module is driven to work; if the pressure value is less than the minimum pressure value obtained based on the set pressure value, the second execution module is driven to work; if the pressure value is within the range of the minimum pressure value to the maximum pressure value, the third execution module is driven to work.

[0040] A first execution module, which is used to adjust the pressure of the air spring to a set pressure value and drive the torsion module to work and perform height sensor calibration;

[0041] A second execution module is used to adjust the pressure of the air spring to a set pressure value and drive the torsion module to work to calibrate the height sensor;

[0042] A third execution module, which is used to drive the torsion module to work and perform height sensor calibration;

[0043] A torsion module is used to receive the drive of the inflation module to twist the inflated vehicle to the electrical inspection station, receive the drive of the first execution module to adjust the pressure of the air spring to the set pressure value and twist the vehicle to the detection line, receive the drive of the second execution module to adjust the pressure of the air spring to the set pressure value and twist the vehicle to the detection line, and receive the drive of the third execution module to directly twist the vehicle to the detection line.

[0044] On the basis of the above technical solution, the set pressure value inputted is used to drive the production line equipment to inflate the air spring of the vehicle, and twist the inflated vehicle to the electrical inspection station. The specific process includes:

[0045] Based on the input set pressure value, the production line equipment is driven to inflate the vehicle's air spring and the pressure of the inflated air spring is detected in real time;

[0046] When it is detected that the pressure value of the air spring is within the pressure value range obtained based on the set pressure value and the first error value, the inflation of the air spring is stopped.

[0047] Compared with the prior art, the advantages of the present invention are: because the control accuracy of the pressure sensor and the control accuracy of the inflation equipment in the air suspension system are greater than those of the production line inflation equipment, when the production line equipment completes the inflation of the vehicle's air spring, the pressure value of the air spring is detected by the air suspension controller, and the pressure value of the air spring is obtained based on the detection: if the pressure value is greater than the maximum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, and the vehicle is twisted to the detection line to calibrate the height sensor; if the pressure value is less than the minimum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, and the vehicle is twisted to the detection line to calibrate the height sensor; if the pressure value is within the range of the minimum pressure value to the maximum pressure value, the vehicle is directly twisted to the detection line to calibrate the height sensor. The present invention effectively improves the success rate of the height sensor calibration by secondary detection and adjustment of the air spring pressure value, saves the time spent on the height sensor calibration, and effectively improves the vehicle production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 The present invention is a flowchart of a method for controlling inflation pressure of an air suspension line in an embodiment of the present invention.

[0050] Figure 2 Schematic diagram of the air suspension system. DETAILED DESCRIPTION

[0051] The embodiment of the present invention provides a method for controlling the inflation pressure of an air suspension line. When the production line equipment completes the inflation of the air spring of the vehicle, the pressure value of the air spring is detected by the air suspension controller, and the pressure value of the air spring is obtained based on the detection: if the pressure value is greater than the maximum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, and the vehicle is twisted to the detection line to calibrate the height sensor; if the pressure value is less than the minimum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, and the vehicle is twisted to the detection line to calibrate the height sensor; if the pressure value is within the range of the minimum pressure value to the maximum pressure value, the vehicle is directly twisted to the detection line to calibrate the height sensor. The present invention effectively improves the success rate of the height sensor calibration by secondary detection and adjustment of the air spring pressure value, saves the time spent on the height sensor calibration, and effectively improves the vehicle production efficiency. The present invention also provides a control device for the inflation pressure of an air suspension line in real time.

[0052] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0053] See also Figure 1 As shown, a method for controlling the inflation pressure of an air suspension line provided by an embodiment of the present invention specifically includes the following steps:

[0054] S1: Based on the input set pressure value, the production line equipment inflates the vehicle's air spring and twists the inflated vehicle to the electrical inspection station;

[0055] S2: Detect the pressure value of the air spring through the air suspension controller, and obtain the pressure value of the air spring based on the detection. If the pressure value is greater than the maximum pressure value obtained based on the set pressure value, go to S3; if the pressure value is less than the minimum pressure value obtained based on the set pressure value, go to S4; if the pressure value is within the range from the minimum pressure value to the maximum pressure value, go to S5;

[0056] S3: Adjust the pressure of the air spring to the set pressure value, and twist the vehicle to the detection line to calibrate the height sensor;

[0057] S4: Adjust the pressure of the air spring to the set pressure value, and twist the vehicle to the detection line to calibrate the height sensor;

[0058] S5: Directly twist the vehicle to the detection line to calibrate the height sensor.

[0059] It should be noted that for the vehicle's air suspension system, Figure 2 As shown, the air suspension control unit is connected to the left front height sensor, the right front height sensor, the left rear height sensor and the right rear height sensor, the air suspension control unit is connected to the air suspension air supply, the air suspension air supply is connected to the left front air spring, the right front air spring, the left rear air spring and the right rear air spring, and the air suspension air supply is also connected to the air suspension air storage.

[0060] In the present invention, based on the input set pressure value, the production line equipment inflates the air spring of the vehicle and twists the inflated vehicle to the electrical inspection station. The specific steps include:

[0061] S101: Based on the input set pressure value, the production line equipment inflates the air spring of the vehicle and detects the pressure of the inflated air spring in real time;

[0062] S102: When it is detected that the pressure value of the air spring is within the pressure value range obtained based on the set pressure value and the first error value, the inflation of the air spring is stopped, and the inflated vehicle is twisted to the electrical inspection station.

[0063] For example, the pressure value is set to Bbar, and when the pressure value of the air spring is detected to reach Bbar±0.2bar, the inflation of the air spring is stopped.

[0064] In the present invention, the pressure value of the air spring is detected by the air suspension controller, and the specific steps include:

[0065] S201: Control the air suspension controller to write the vehicle VIN (Vehicle Identification Number) code and configuration word before other controllers, and reset the air suspension controller;

[0066] S202: After the air suspension controller writes the vehicle VIN code and the configuration word, and the air suspension controller is reset, the air suspension controller detects the pressure value of the air spring based on the feedback from the pressure sensor.

[0067] In the present invention, the maximum pressure value is obtained according to the sum of the set pressure value and the second error value; the minimum pressure value is obtained according to the difference between the set pressure value and the second error value. For example, if the second error value is 0.1 bar, the maximum pressure value is Bbar+0.1 bar, and the minimum pressure value is Bbar-0.1 bar.

[0068] In the present invention, if the pressure value is greater than the maximum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value. Specifically, if the pressure value of the air spring is greater than the maximum pressure value, the air suspension controller deflates the air suspension to the set pressure value through the bleed valve and according to the feedback of the pressure sensor.

[0069] For example, if the pressure value of the air spring is greater than Bbar+0.1bar, the air suspension controller will deflate the air suspension to the set pressure value Bbar through the deflation valve and according to the feedback from the pressure sensor.

[0070] In the present invention, if the pressure value is less than the minimum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value. Specifically, if the pressure value of the air spring is less than the minimum pressure value, the air suspension controller controls the air pump and inflates the air suspension to the set pressure value based on the feedback from the pressure sensor.

[0071] For example, if the pressure value of the air spring is less than Bbar-0.1bar, the air suspension controller controls the air pump and inflates the air suspension to the set pressure value Bbar according to the feedback from the pressure sensor.

[0072] Furthermore, if the pressure value of the air spring is Bbar±0.1bar, the air suspension controller does not adjust the pressure of the air spring, but directly twists the vehicle to the detection line to calibrate the height sensor.

[0073] In the present invention, the height sensor is calibrated, and the specific steps include:

[0074] A: Twist the vehicle to the detection line and enter the height sensor calibration station;

[0075] B: Detect the height value from the wheel center to the wheel arch, and send the detected height value to the air suspension controller through the detection line calibration equipment;

[0076] C: Based on the height from the wheel center to the wheel arch, the difference between the initial height of the vehicle and the design height is calculated;

[0077] D: Determine whether the calculated difference is within the set error range. If so, perform the height sensor calibration and the calibration is successful. If not, it means that the height sensor calibration has failed.

[0078] For example, setting the error range to ±Amm, the air suspension controller calculates the difference between the initial calibration height of the vehicle and the design height based on the height value from the wheel center to the wheel arch. If the difference between the initial calibration height of the vehicle and the design height is within the range of ±Amm, the height sensor calibration is performed and the calibration is successful. If the difference between the initial calibration height of the vehicle and the design height is not within the range of ±Amm, it indicates that the height sensor calibration has failed.

[0079] In the present invention, when the height sensor calibration fails, it also includes: returning the vehicle to the repair area for adjustment, adjusting the difference between the initial calibration height of the whole vehicle and the design height to be within a set error range, and then re-calibrating the height sensor until the calibration is successful.

[0080] The present invention can effectively solve the defects of the existing height sensor calibration solution, which is specifically described as follows:

[0081] 1. How to reduce or eliminate the 0.2bar error. In the present invention, the air suspension controller controls the pressure of the air spring according to the value fed back by the pressure sensor in the system. When the pressure is greater than Bbar+0.1bar, the air suspension controller deflates the pressure of the air suspension to Bbar through the bleed valve and the feedback of the pressure sensor; when the pressure is less than Bbar-0.1bar, the air suspension controller controls the air pump in the system and inflates the air spring to Bbar according to the feedback value of the pressure sensor.

[0082] 2. Adding a process of adjusting the pressure of the air spring will increase the production cycle. The present invention combines this process with other processes in parallel without increasing the total cycle.

[0083] 3. The whole vehicle needs to be powered for air spring pressure regulation, and it needs to be run in parallel with the original process. The electrical inspection station 1 of the production line is where each controller writes the vehicle VIN code and configuration word in sequence. The whole vehicle is powered on to meet the power supply requirements of the air suspension controller. In the present invention, after the air suspension controller writes the vehicle VIN code and configuration word, and the air suspension controller is reset, the air suspension controller adjusts the air spring pressure. At this time, other controllers write the vehicle VIN code and configuration word in parallel in sequence to meet the requirements of running in parallel with the original process.

[0084] 3. It takes 2 minutes to adjust the air spring pressure, which is a long time. The entire electrical inspection 1 process takes 5 minutes. You only need to write the vehicle VIN code and configuration word into the air suspension controller and put it at the first step of the electrical inspection 1 process, and the time can meet the parallel requirements.

[0085] The method for controlling the inflation pressure of an air suspension line in an embodiment of the present invention is as follows: when the production line equipment completes inflating the air spring of a vehicle, the pressure value of the air spring is detected by the air suspension controller, and the pressure value of the air spring is obtained based on the detection: if the pressure value is greater than the maximum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, and the vehicle is twisted to the detection line to calibrate the height sensor; if the pressure value is less than the minimum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, and the vehicle is twisted to the detection line to calibrate the height sensor; if the pressure value is within the range of the minimum pressure value to the maximum pressure value, the vehicle is directly twisted to the detection line to calibrate the height sensor. The present invention effectively improves the success rate of the height sensor calibration by secondary detection and adjustment of the air spring pressure value, saves the time spent on the height sensor calibration, and effectively improves the vehicle production efficiency.

[0086] In a possible implementation, an embodiment of the present invention further provides a readable storage medium, the readable storage medium is located in a PLC (Programmable Logic Controller) controller, and a computer program is stored on the readable storage medium. When the program is executed by a processor, the following steps of the method for controlling the inflation pressure of the air suspension line are implemented:

[0087] Based on the input set pressure value, the production line equipment inflates the vehicle's air spring and twists the inflated vehicle to the electrical inspection station;

[0088] The air suspension controller detects the pressure value of the air spring and obtains the pressure value of the air spring based on the detection:

[0089] If the pressure value is greater than the maximum pressure value based on the set pressure value, adjust the pressure of the air spring to the set pressure value, twist the vehicle to the detection line, and calibrate the height sensor;

[0090] If the pressure value is less than the minimum pressure value obtained based on the set pressure value, adjust the pressure of the air spring to the set pressure value, twist the vehicle to the detection line, and calibrate the height sensor;

[0091] If the pressure value is within the range from the minimum pressure value to the maximum pressure value, directly twist the vehicle to the detection line to calibrate the height sensor.

[0092] The storage medium may adopt any combination of one or more computer-readable media. The computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. The computer-readable storage medium may be, for example, but not limited to: an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device or device.

[0093] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, device, or device. The program code contained on the computer-readable medium may be transmitted using any suitable medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0094] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0095] An embodiment of the present invention provides a control device for inflation pressure on an air suspension line, comprising an inflation module, a detection module, a first execution module, a second execution module, a third execution module and a torsion module.

[0096] The inflation module is used to drive the production line equipment to inflate the vehicle's air spring based on the input set pressure value, and then drive the torsion module to work; the detection module is used to drive the air suspension controller to detect the pressure value of the air spring, and obtain the pressure value of the air spring based on the detection. If the pressure value is greater than the maximum pressure value obtained based on the set pressure value, the first execution module is driven to work; if the pressure value is less than the minimum pressure value obtained based on the set pressure value, the second execution module is driven to work; if the pressure value is within the range of the minimum pressure value to the maximum pressure value, the third execution module is driven to work. The first execution module is used to adjust the pressure of the air spring to the set pressure value, and drive the torsion module to work and perform height sensor calibration; the second execution module is used to adjust the pressure of the air spring to the set pressure value, and drive the torsion module to work and perform height sensor calibration; the third execution module is used to drive the torsion module to work and perform height sensor calibration; the torsion module is used to accept the drive of the inflation module to twist the inflated vehicle to the electrical inspection station, accept the drive of the first execution module to twist the vehicle with the air spring pressure adjusted to the set pressure value to the detection line, accept the drive of the second execution module to twist the vehicle with the air spring pressure adjusted to the set pressure value to the detection line, and accept the drive of the third execution module to directly twist the vehicle to the detection line.

[0097] In the present invention, based on the input set pressure value, the production line equipment is driven to inflate the air spring of the vehicle, and the inflated vehicle is twisted to the electrical inspection station. The specific process includes:

[0098] Based on the input set pressure value, the production line equipment is driven to inflate the vehicle's air spring and the pressure of the inflated air spring is detected in real time;

[0099] When it is detected that the pressure value of the air spring is within the pressure value range obtained based on the set pressure value and the first error value, the inflation of the air spring is stopped.

[0100] In the present invention, the pressure value of the air spring is detected by the air suspension controller, and the specific process includes:

[0101] Control the air suspension controller to write the vehicle VIN code and configuration word before other controllers, and reset the air suspension controller;

[0102] When the vehicle VIN code and configuration word are written into the air suspension controller and the air suspension controller is reset, the air suspension controller detects the pressure value of the air spring based on the feedback from the pressure sensor.

[0103] In the present invention, the maximum pressure value is obtained according to the sum of the set pressure value and the second error value; the minimum pressure value is obtained according to the difference between the set pressure value and the second error value.

[0104] In the present invention, if the pressure value is greater than the maximum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value. Specifically, if the pressure value of the air spring is greater than the maximum pressure value, the air suspension controller deflates the air suspension to the set pressure value through the bleed valve and according to the feedback of the pressure sensor.

[0105] In the present invention, if the pressure value is less than the minimum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value. Specifically, if the pressure value of the air spring is less than the minimum pressure value, the air suspension controller controls the air pump and inflates the air suspension to the set pressure value based on the feedback from the pressure sensor.

[0106] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

[0107] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the process in the flowchart. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

Claims

1. A method for controlling the inflation pressure of an air suspension line, characterized in that: The specific steps include: Based on the input set pressure value, the production line equipment inflates the vehicle's air spring and twists the inflated vehicle to the electrical inspection station; The air suspension controller detects the pressure value of the air spring and obtains the pressure value of the air spring based on the detection: If the pressure value is greater than the maximum pressure value based on the set pressure value, adjust the pressure of the air spring to the set pressure value, twist the vehicle to the detection line, and calibrate the height sensor; If the pressure value is less than the minimum pressure value obtained based on the set pressure value, adjust the pressure of the air spring to the set pressure value, twist the vehicle to the detection line, and calibrate the height sensor; If the pressure value is within the range from the minimum pressure value to the maximum pressure value, the vehicle is directly twisted to the detection line to calibrate the height sensor; The air suspension controller is used to detect the pressure value of the air spring, and the specific steps include: Control the air suspension controller to write the vehicle VIN code and configuration word before other controllers, and reset the air suspension controller; When the air suspension controller writes the vehicle VIN code and configuration word, and the air suspension controller is reset, the air suspension controller detects the pressure value of the air spring based on the feedback of the pressure sensor; The maximum pressure value is obtained according to the sum of the set pressure value and the second error value; The minimum pressure value is obtained according to the difference between the set pressure value and the second error value; Wherein, the second error value is 0.1 bar; If the pressure value is greater than the maximum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, specifically: If the pressure value of the air spring is greater than the maximum pressure value, the air suspension controller deflates the air suspension to the set pressure value through the bleed valve and according to the feedback from the pressure sensor; If the pressure value is less than the minimum pressure value obtained based on the set pressure value, the pressure of the air spring is adjusted to the set pressure value, specifically: If the pressure value of the air spring is less than the minimum pressure value, the air suspension controller controls the air pump and inflates the air suspension to the set pressure value based on the feedback from the pressure sensor.

2. A method for controlling inflation pressure on an air suspension line according to claim 1, characterized in that: Based on the input set pressure value, the production line equipment inflates the air spring of the vehicle and twists the inflated vehicle to the electrical inspection station. The specific steps include: Based on the input set pressure value, the production line equipment inflates the vehicle's air spring and detects the pressure of the inflated air spring in real time; When it is detected that the pressure value of the air spring is within the pressure value range obtained based on the set pressure value and the first error value, the inflation of the air spring is stopped, and the inflated vehicle is twisted to the electrical inspection station.

3. A method for controlling inflation pressure on an air suspension line as claimed in claim 1, characterized in that: The height sensor calibration specifically includes the following steps: Twist the vehicle to the test line and enter the height sensor calibration station; The height value from the wheel center to the wheel eyebrow is detected, and the detected height value is sent to the air suspension controller through the detection line calibration device; Based on the height from the wheel center to the wheel arch, the difference between the initial height of the vehicle and the design height is calculated; It is determined whether the calculated difference is within the set error range. If so, the height sensor is calibrated successfully. If not, it indicates that the height sensor calibration has failed.

4. A method for controlling inflation pressure on an air suspension line as claimed in claim 3, characterized in that: When the height sensor calibration fails, it also includes: The vehicle is returned to the repair area for adjustment, and the difference between the initial calibration height of the vehicle and the design height is adjusted to be within the set error range, and then the height sensor is recalibrated.

5. A device for controlling inflation pressure on an air suspension line, using a method for controlling inflation pressure on an air suspension line as claimed in claim 1, characterized in that: include: The charging module is used to drive the production line equipment to inflate the air spring of the vehicle based on the input set pressure value, and then drive the torsion module to work; a detection module, which is used to drive the air suspension controller to detect the pressure value of the air spring, and obtain the pressure value of the air spring based on the detection, if the pressure value is greater than the maximum pressure value obtained based on the set pressure value, drive the first execution module to work, if the pressure value is less than the minimum pressure value obtained based on the set pressure value, drive the second execution module to work, if the pressure value is within the range of the minimum pressure value to the maximum pressure value, drive the third execution module to work; A first execution module, which is used to adjust the pressure of the air spring to a set pressure value and drive the torsion module to work and perform height sensor calibration; A second execution module is used to adjust the pressure of the air spring to a set pressure value and drive the torsion module to work to calibrate the height sensor; A third execution module, which is used to drive the torsion module to work and perform height sensor calibration; A torsion module is used to receive the drive of the inflation module to twist the inflated vehicle to the electrical inspection station, receive the drive of the first execution module to adjust the pressure of the air spring to the set pressure value and twist the vehicle to the detection line, receive the drive of the second execution module to adjust the pressure of the air spring to the set pressure value and twist the vehicle to the detection line, and receive the drive of the third execution module to directly twist the vehicle to the detection line.

6. A control device for inflation pressure on an air suspension line as claimed in claim 5, characterized in that: Based on the input set pressure value, the production line equipment is driven to inflate the air spring of the vehicle, and the inflated vehicle is twisted to the electrical inspection station. The specific process includes: Based on the input set pressure value, the production line equipment is driven to inflate the vehicle's air spring and the pressure of the inflated air spring is detected in real time; When it is detected that the pressure value of the air spring is within the pressure value range obtained based on the set pressure value and the first error value, the inflation of the air spring is stopped.

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