Intelligent control system and method for load of truck lifting bridge

Abstract

The present invention discloses an intelligent control system and method for the load of a lifting axle of a truck, and relates to the field of intelligent control of automobiles. The system includes a sensor component and a height valve for sensing the axle load of a driving axle; the control component includes an ECU and a solenoid valve, the air inlet of the solenoid valve is connected to the gas tank of the vehicle, and the air outlet is connected to the left airbag, the right airbag and the lifting airbag of the vehicle, and the height valve and the solenoid valve are both electrically connected to the ECU; the ECU is used to control the solenoid valve based on the axle load of the driving axle sensed by the height valve when the vehicle is in an unloaded state, the vehicle is in a loaded state and the axle load of the driving axle is less than the set axle load, or the vehicle is in a loaded state and the axle load of the driving axle is not less than the set axle load. The present invention can effectively avoid abnormal wear of the tire of the vehicle lifting axle due to unreasonable distribution of the axle load of the lifting axle, and the occurrence of dangerous situations such as insufficient driving force slipping, parking slipping, etc.

Description

Technical Field

[0001] The present invention relates to the field of automobile intelligent control, and in particular to an intelligent control system and method for a load on a lifting axle of a truck. Background Art

[0002] At present, with toll roads charging by axle and relevant departments taking increasingly strict measures to control overweight vehicles, trucks with lifting bridges have developed rapidly in the past two years. However, in the actual use of lifting bridges, drivers often keep the lifting bridges in the lifting state when they are empty or fully loaded, and only temporarily lower the lifting bridges at overweight stations and other places to avoid inspection. In order to avoid the continued occurrence of the above situation, it is currently mandatory to only allow lifting bridges to be lifted when empty.

[0003] The lifting axle is an air bag type composite suspension lifting axle, which is mainly used for the middle axle of 6X2 or 8X2 trucks. At present, the control logic of the lifting axle is as follows: there is a rocker switch in the cab, which controls the raising and lowering of the lifting axle through a two-position five-way solenoid valve, the air inlet end of the two-position five-way solenoid valve is connected to the air tank, and the air outlet end is connected to the lifting axle airbag, and a pressure limiting valve is added to the air outlet end of the air tank; when unloaded, the switch is in the raising state, the lifting airbag is inflated, the lifting axle is suspended, and the load-bearing airbag is deflated; when loaded, the switch is in the lowering state, the lifting airbag is deflated, and the load-bearing airbag is inflated to the pressure limit value; this control logic causes the air pressure of the load-bearing airbag to be fixed when the lifting axle is lowered, and the air pressure of the load-bearing airbag cannot be adjusted according to the axle load, resulting in the lifting axle axle load distribution being more and the driving axle axle load distribution being less when the vehicle is half-loaded and the center of gravity of the cargo is forward or when the driving axle falls into a pit, resulting in insufficient driving force for the vehicle. At the same time, it will also cause the vehicle to slip when parking on a slope due to insufficient adhesion of the drive axle and insufficient parking force of the vehicle. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide an intelligent control system and method for the load of a truck lifting axle, which can effectively avoid abnormal wear of the vehicle lifting axle tires due to unreasonable distribution of the lifting axle load, and avoid dangerous situations such as slipping due to insufficient driving force and parking slipping.

[0005] In order to achieve the above objectives, the present invention provides an intelligent control system for the load of a truck lifting axle, comprising:

[0006] A sensing assembly, the sensing assembly comprising a height valve for sensing axle load conditions of the drive axle;

[0007] A control component, the control component includes an ECU and a solenoid valve, an air inlet of the solenoid valve is connected to an air tank of the vehicle, an air outlet is connected to a left airbag, a right airbag and a lifting airbag of the vehicle, and the height valve and the solenoid valve are both electrically connected to the ECU;

[0008] Among them, the ECU is used to control the solenoid valve based on the drive axle load obtained by sensing the height valve, when the vehicle is in an unloaded state, the vehicle is in a loaded state and the drive axle load is less than the set axle load, or the vehicle is in a loaded state and the drive axle load is not less than the set axle load, thereby controlling the inflation / deflation of the left airbag, the right airbag and the lifting airbag accordingly.

[0009] Based on the above technical solutions,

[0010] The solenoid valve has three air outlets, namely a first air outlet, a second air outlet and a third air outlet;

[0011] The first air outlet is connected to the lifting airbag;

[0012] The second air outlet is connected to the left air bag and the right air bag;

[0013] The third air outlet is connected to the lifting airbags through the first air outlet, and is connected to the left airbag and the right airbag through the second air outlet, so as to realize the deflation of the left airbag, the right airbag and the lifting airbag.

[0014] On the basis of the above technical solution, when the vehicle is unloaded:

[0015] The height valve sends a first electrical signal to the ECU. If the first electrical signal received by the ECU lasts for a preset time, the ECU controls the first air outlet of the solenoid valve to open and connect with the air inlet to inflate the lifting airbag, and controls the second air outlet to connect with the third air outlet to discharge the gas in the left airbag and the right airbag through the third air outlet.

[0016] On the basis of the above technical solution, when the vehicle is in a load-bearing state and the drive axle load is less than the set axle load:

[0017] The height valve sends a second electrical signal to the ECU. If the second electrical signal received by the ECU lasts for a preset time, the ECU controls the first air outlet of the solenoid valve to be connected to the third air outlet to discharge the gas in the lifting airbag through the third air outlet, and controls the second air outlet to be in a closed state, so that the left and right airbags are not inflated.

[0018] On the basis of the above technical solution, when the vehicle is in a load-bearing state and the drive axle load is not less than the set axle load:

[0019] The height valve sends a third electrical signal to the ECU. If the third electrical signal received by the ECU lasts for a preset time, the ECU controls the second air outlet of the solenoid valve to open and connect with the air inlet to inflate the left and right airbags. When the air pressure in the left and right airbags is greater than the preset pressure and has lasted for a set time, the ECU controls the second air outlet of the solenoid valve to close to stop inflating the left and right airbags.

[0020] On the basis of the above technical solution, an air pressure sensor is provided on the right airbag, and the air pressure sensor is used to sense the air pressure in the right airbag and feed back the sensed air pressure signal to the ECU.

[0021] On the basis of the above technical solution, one end of the height valve is fixed on the drive axle, and the other end is fixed on the vehicle frame.

[0022] On the basis of the above technical solution, the system further includes a rocker switch, and the rocker switch is electrically connected to the ECU.

[0023] Based on the above technical solution, when the vehicle speed is lower than the set speed and has lasted for a first preset time, the ECU controls the solenoid valve based on the signal of the rocker switch to control the inflation / deflation of the left airbag, the right airbag and the lifting airbag.

[0024] The present invention provides a method for intelligently controlling the load of a truck lifting axle, which is implemented based on the above-mentioned intelligent control system for the load of a truck lifting axle, and specifically includes the following steps:

[0025] The drive axle load obtained by the ECU based on the height valve sensing is as follows:

[0026] When the vehicle is unloaded for a preset time, the ECU controls the solenoid valve to inflate the lift airbag and discharge the gas in the left and right airbags at the same time;

[0027] When the vehicle is in a loaded state and the drive axle load is less than the set axle load and has lasted for a preset time, the ECU controls the solenoid valve to discharge the gas in the lifting airbag and controls the left and right airbags not to inflate;

[0028] When the vehicle is in a load-bearing state and the drive axle load is not less than the set axle load and has lasted for a preset time, the ECU controls the solenoid valve to inflate the left and right airbags, and when the air pressure in the left and right airbags is greater than the preset pressure and has lasted for a set time, the ECU stops inflating the left and right airbags.

[0029] Compared with the prior art, the advantages of the present invention are: by using a height valve to sense the axle load of the drive axle, and then based on the axle load of the drive axle sensed by the height valve, when the vehicle is in an unloaded state, the vehicle is in a loaded state and the axle load of the drive axle is less than the set axle load, or the vehicle is in a loaded state and the axle load of the drive axle is not less than the set axle load, the ECU controls the solenoid valve, thereby correspondingly controlling the inflation / deflation of the left airbag, the right airbag and the lifting airbag, effectively avoiding abnormal wear of the vehicle's lifting axle tires due to unreasonable distribution of the lifting axle load, and causing dangerous situations such as insufficient driving force slipping, parking slipping, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] 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 paying any creative work.

[0031] Figure 1 It is a structural schematic diagram of an intelligent control system for lifting axle load of a truck in an embodiment of the present invention.

[0032] In the figure: 1- rocker switch, 2- ECU, 3- air tank, 4- solenoid valve, 5- lifting airbag, 6- left airbag, 7- height valve, 8- right airbag, 9- air pressure sensor, 10- air inlet, 11- third air outlet, 12- second air outlet, 13- first air outlet. DETAILED DESCRIPTION

[0033] The embodiment of the present invention provides an intelligent control system for the load of a lifting axle of a truck, which senses the axle load of the drive axle by using a height valve 7, and then based on the axle load of the drive axle sensed by the height valve 7, when the vehicle is in an unloaded state, the vehicle is in a loaded state and the axle load of the drive axle is less than the set axle load, or the vehicle is in a loaded state and the axle load of the drive axle is not less than the set axle load, the ECU 2 controls the solenoid valve 4, thereby correspondingly controlling the inflation / deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5, effectively avoiding abnormal wear of the tires of the vehicle lifting axle due to unreasonable distribution of the axle load of the lifting axle, and the occurrence of dangerous situations such as insufficient driving force slipping, parking slipping, etc. The embodiment of the present invention also provides an intelligent control method for the load of a lifting axle of a truck accordingly.

[0034] 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.

[0035] See also Figure 1 As shown, an embodiment of the present invention provides an intelligent control system for load of a truck lifting bridge, including a sensor component and a control component.

[0036] In the embodiment of the present invention, the sensor assembly includes a height valve 7 for sensing the axle load of the drive axle, one end of the height valve 7 is fixed to the drive axle, and the other end is fixed to the vehicle frame. By setting the height valve 7, the vehicle's no-load condition and the axle load of the drive axle can be sensed, so that the axle load of the vehicle's drive axle can be obtained in real time, so as to control the inflation / deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5 of the vehicle.

[0037] In the embodiment of the present invention, the control component includes an ECU2 (Electronic Control Unit) and a solenoid valve 4, wherein the air inlet 10 of the solenoid valve 4 is connected to the gas tank 3 of the vehicle, and the air outlet is connected to the left airbag 6, the right airbag 8 and the lifting airbag 5 of the vehicle, and the height valve 7 and the solenoid valve 4 are both electrically connected to the ECU2. The height valve 7 transmits the sensed drive axle load to the ECU2 in real time so that the ECU2 can control the solenoid valve 4. The ECU2 is used to control the solenoid valve 4 based on the drive axle load sensed by the height valve 7 when the vehicle is in an unloaded state, the vehicle is in a loaded state and the drive axle load is less than the set axle load, or the vehicle is in a loaded state and the drive axle load is not less than the set axle load, thereby correspondingly controlling the inflation / deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5. That is, when the vehicle is in an unloaded state, the vehicle is in a loaded state and the drive axle load is less than the set axle load, or the vehicle is in a loaded state and the drive axle load is not less than the set axle load, ECU2 adopts corresponding inflation / deflation control strategies for the left airbag 6, the right airbag 8 and the lifting airbag 5 to ensure the normal driving of the vehicle.

[0038] Figure 1 In the figure, the solenoid valve 4 is connected to the lifting airbag 5, the right airbag 8 and the left airbag 6 by an air circuit, the ECU2 and the height valve 7 are connected by a height valve signal line, the ECU2 and the air pressure sensor 9 are connected by an air pressure sensor signal line, the rocker switch 1 and the ECU2 are connected by an ECU signal line, the ECU2 and the solenoid valve 4 are connected by an ECU signal line, and the air tank 3 and the ECU2 are connected by an air circuit.

[0039] The electromagnetic valve 4 includes three air outlets, namely the first air outlet 13, the second air outlet 12 and the third air outlet 11; the first air outlet 13 is connected to the lifting airbag 5; the second air outlet 12 is connected to the left airbag 6 and the right airbag 8; the third air outlet 11 is connected to the lifting airbag 5 through the first air outlet 13, and is connected to the left airbag 6 and the right airbag 8 through the second air outlet 12, for achieving the deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5. Inside the electromagnetic valve 4, the third air outlet 11 can be connected to the first air outlet 13 or the second air outlet 12.

[0040] In the embodiment of the present invention, when the vehicle is in an unloaded state:

[0041] The height valve 7 sends a first electrical signal to ECU2. If the first electrical signal received by ECU2 lasts for a preset time, ECU2 controls the first air outlet 13 of the solenoid valve 4 to open and connect with the air inlet 10 to inflate the lifting airbag 5, and controls the second air outlet 12 to connect with the third air outlet 11 to discharge the gas in the left airbag 6 and the right airbag 8 through the third air outlet 11.

[0042] That is, ECU2 controls the first air outlet 13 of the solenoid valve 4 to open and connect with the air inlet 10, so that the air tank 3 inflates the lifting airbag 5 to lift the lifting bridge; ECU2 controls the second air outlet 12 to connect with the third air outlet 11, and the gas in the left airbag 6 and the right airbag 8 is discharged through the third air outlet 11.

[0043] In the embodiment of the present invention, when the vehicle is in a load-bearing state and the drive axle load is less than the set axle load:

[0044] The height valve 7 sends a second electrical signal to ECU2. If the second electrical signal received by ECU2 lasts for a preset time, ECU2 controls the first air outlet 13 of the solenoid valve 4 to be connected with the third air outlet 11 to discharge the gas in the lifting airbag 5 through the third air outlet 11, and controls the second air outlet 12 to be in a closed state, so that the left airbag 6 and the right airbag 8 are not inflated.

[0045] That is, ECU2 controls the first air outlet 13 of the solenoid valve 4 to open and connect it to the third air outlet 11, and the gas in the lifting airbag 5 is discharged through the third air outlet 11, and the lifting bridge is lowered. However, the second air outlet 12 is closed at this time, and the left airbag 6 and the right airbag 8 are not inflated. In the current state, the lifting bridge is only lowered but does not carry any load.

[0046] In the embodiment of the present invention, when the vehicle is in a load-bearing state and the drive axle load is not less than the set axle load:

[0047] The height valve 7 sends a third electrical signal to the ECU 2. If the third electrical signal received by the ECU 2 lasts for a preset time, the ECU 2 controls the second air outlet 12 of the solenoid valve 4 to open and communicate with the air inlet 10 to inflate the left airbag 6 and the right airbag 8. When the air pressure in the left airbag 6 and the right airbag 8 is greater than the preset air pressure and lasts for a set time, the ECU 2 controls the second air outlet 12 of the solenoid valve 4 to close to stop inflating the left airbag 6 and the right airbag 8. At the same time, in this state, the lifting airbag 5 is not inflated.

[0048] That is, ECU2 controls the second air outlet 12 of the solenoid valve 4 to open and connect with the air inlet 10, and the air tank 3 inflates the left airbag 6 and the right airbag 8. During the inflation process, when the air pressure in the left airbag 6 and the right airbag 8 is greater than the preset air pressure and has lasted for a set time, that is, the air pressure in the left airbag 6 and the right airbag 8 can bear the excess axle load, ECU2 controls the second air outlet 12 of the solenoid valve 4 to close, and stops inflating the left airbag 6 and the right airbag 8.

[0049] In the embodiment of the present invention, a pressure sensor 9 is provided on the right airbag 8, and the pressure sensor 9 is used to sense the air pressure in the right airbag 8, and feed back the sensed pressure signal to the ECU 2. When the vehicle is in a load-bearing state and the axle load of the drive axle is not less than the set axle load, during the process of inflating the left airbag 6 and the right airbag 8, the pressure sensor 9 senses the air pressure in the airbag in real time. When the air pressure in the left airbag 6 and the right airbag 8 is greater than the preset pressure and has lasted for a set time, the pressure sensor 9 outputs an electrical signal to the ECU 2, and the ECU 2 outputs an electrical signal to the solenoid valve 4, and the second air outlet 12 of the solenoid valve 4 is closed.

[0050] The intelligent control system for the load of the lifting bridge of a truck in an embodiment of the present invention also includes a rocker switch 1, which is electrically connected to the ECU 2. When the speed of the vehicle is lower than the set speed and has lasted for a first preset time, the ECU 2 controls the solenoid valve 4 based on the signal of the rocker switch 1 to control the inflation / deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5. The set speed can be 20km / h. The rocker switch 1 has three gears, namely, up, down, and automatic. That is, when the speed of the vehicle is lower than the set speed and has lasted for a first preset time, the inflation / deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5 is controlled according to the conventional rocker switch 1 control method to achieve the lifting and lowering of the lifting bridge.

[0051] The intelligent control system for the lifting axle load of a truck in an embodiment of the present invention senses the axle load of the drive axle by using a height valve 7, and then based on the axle load of the drive axle sensed by the height valve 7, when the vehicle is in an unloaded state, the vehicle is in a loaded state and the axle load of the drive axle is less than the set axle load, or the vehicle is in a loaded state and the axle load of the drive axle is not less than the set axle load, the ECU 2 controls the solenoid valve 4, thereby correspondingly controlling the inflation / deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5, effectively avoiding abnormal wear of the tires of the vehicle lifting axle due to unreasonable distribution of the axle load of the lifting axle, and causing dangerous situations such as insufficient driving force slipping, parking slipping, etc.

[0052] An embodiment of the present invention provides a method for intelligently controlling the load of a truck lifting axle, which is implemented based on the above-mentioned intelligent control system for the load of a truck lifting axle. The method specifically includes the following steps:

[0053] S1: ECU2, based on the drive axle load sensed by the height valve 7, goes to S2 when the vehicle is unloaded and has lasted for a preset time; goes to S3 when the vehicle is loaded and the drive axle load is less than the set axle load and has lasted for a preset time; goes to S4 when the vehicle is loaded and the drive axle load is not less than the set axle load and has lasted for a preset time;

[0054] S2: ECU2 controls the solenoid valve 4 to inflate the lifting airbag 5 and discharge the gas in the left airbag 6 and the right airbag 8 at the same time; that is, ECU2 controls the first air outlet 13 of the solenoid valve 4 to open and connect with the air inlet 10 to inflate the lifting airbag 5, and controls the second air outlet 12 to connect with the third air outlet 11 to discharge the gas in the left airbag 6 and the right airbag 8 through the third air outlet 11.

[0055] S3: ECU2 controls the solenoid valve 4 to discharge the gas in the lifting airbag 5, and at the same time controls the left airbag 6 and the right airbag 8 not to be inflated; that is, ECU2 controls the first air outlet 13 of the solenoid valve 4 to be connected with the third air outlet 11 to discharge the gas in the lifting airbag 5 through the third air outlet 11, controls the second air outlet 12 to be in a closed state, and the left airbag 6 and the right airbag 8 are not inflated.

[0056] S4: ECU2 controls the solenoid valve 4 to inflate the left airbag 6 and the right airbag 8, and when the air pressure in the left airbag 6 and the right airbag 8 is greater than the preset air pressure and has lasted for a set time, the inflation of the left airbag 6 and the right airbag 8 is stopped. That is, ECU2 controls the second air outlet 12 of the solenoid valve 4 to open and communicate with the air inlet 10 to inflate the left airbag 6 and the right airbag 8, and when the air pressure in the left airbag 6 and the right airbag 8 is greater than the preset air pressure and has lasted for a set time, ECU2 controls the second air outlet 12 of the solenoid valve 4 to close to stop inflation of the left airbag 6 and the right airbag 8.

[0057] The electromagnetic valve 4 includes three air outlets, namely the first air outlet 13, the second air outlet 12 and the third air outlet 11; the first air outlet 13 is connected to the lifting airbag 5; the second air outlet 12 is connected to the left airbag 6 and the right airbag 8; the third air outlet 11 is connected to the lifting airbag 5 through the first air outlet 13, and is connected to the left airbag 6 and the right airbag 8 through the second air outlet 12, for achieving the deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5. Inside the electromagnetic valve 4, the third air outlet 11 can be connected to the first air outlet 13 or the second air outlet 12.

[0058] The height valve 7 transmits the sensed drive axle load to the ECU2 in real time so that the ECU2 can control the solenoid valve 4. Based on the drive axle load sensed by the height valve 7, the ECU2 is used to control the solenoid valve 4 when the vehicle is in an unloaded state, the vehicle is in a loaded state and the drive axle load is less than the set axle load, or the vehicle is in a loaded state and the drive axle load is not less than the set axle load, so as to control the inflation / deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5 accordingly. That is, when the vehicle is in an unloaded state, the vehicle is in a loaded state and the drive axle load is less than the set axle load, or the vehicle is in a loaded state and the drive axle load is not less than the set axle load, the ECU2 adopts corresponding inflation / deflation control strategies for the left airbag 6, the right airbag 8 and the lifting airbag 5 to ensure the normal driving of the vehicle.

[0059] The intelligent control method for the load of the lifting axle of a truck in an embodiment of the present invention senses the axle load of the drive axle by using a height valve 7, and then based on the axle load of the drive axle sensed by the height valve 7, when the vehicle is in an unloaded state, the vehicle is in a loaded state and the axle load of the drive axle is less than the set axle load, or the vehicle is in a loaded state and the axle load of the drive axle is not less than the set axle load, the ECU 2 controls the solenoid valve 4, thereby correspondingly controlling the inflation / deflation of the left airbag 6, the right airbag 8 and the lifting airbag 5, effectively avoiding abnormal wear of the tires of the vehicle lifting axle due to unreasonable distribution of the axle load of the lifting axle, and causing dangerous situations such as insufficient driving force slipping, parking slipping, etc.

[0060] 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 intelligent control method for the load of a truck lifting axle are implemented:

[0061] S1: ECU2, based on the drive axle load sensed by the height valve 7, goes to S2 when the vehicle is unloaded and has lasted for a preset time; goes to S3 when the vehicle is loaded and the drive axle load is less than the set axle load and has lasted for a preset time; goes to S4 when the vehicle is loaded and the drive axle load is not less than the set axle load and has lasted for a preset time;

[0062] S2: ECU2 controls the solenoid valve 4 to inflate the lifting airbag 5 and discharge the gas in the left airbag 6 and the right airbag 8 at the same time;

[0063] S3: ECU2 controls the solenoid valve 4 to discharge the gas in the lifting airbag 5, and at the same time controls the left airbag 6 and the right airbag 8 not to be inflated;

[0064] S4: ECU2 controls the solenoid valve 4 to inflate the left airbag 6 and the right airbag 8, and stops inflating the left airbag 6 and the right airbag 8 when the air pressure in the left airbag 6 and the right airbag 8 is greater than the preset air pressure and has lasted for a set time.

[0065] 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.

[0066] 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.

[0067] 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).

[0068] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0069] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0070] 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.

Claims

1. An intelligent control system for the load of a truck lifting bridge, characterized in that: include: A sensor assembly, the sensor assembly comprising a height valve (7) for sensing the axle load of the drive axle; A control component, the control component comprising an ECU (2) and a solenoid valve (4), an air inlet (10) of the solenoid valve (4) being connected to an air tank (3) of a vehicle, an air outlet being connected to a left air bag (6), a right air bag (8) and a lifting air bag (5) of the vehicle, and the height valve (7) and the solenoid valve (4) being electrically connected to the ECU (2); The ECU (2) is used to control the solenoid valve (4) based on the axle load of the driving axle sensed by the height valve (7), when the vehicle is in an unloaded state, the vehicle is in a loaded state and the axle load of the driving axle is less than a set axle load, or the vehicle is in a loaded state and the axle load of the driving axle is not less than the set axle load, so as to control the inflation / deflation of the left airbag (6), the right airbag (8) and the lifting airbag (5) accordingly; The solenoid valve (4) comprises three air outlets, namely a first air outlet (13), a second air outlet (12) and a third air outlet (11); The first air outlet (13) is connected to the lifting airbag (5); The second air outlet (12) is connected to the left air bag (6) and the right air bag (8); The third air outlet (11) is connected to the lifting airbag (5) through the first air outlet (13), and is connected to the left airbag (6) and the right airbag (8) through the second air outlet (12), so as to realize the deflation of the left airbag (6), the right airbag (8) and the lifting airbag (5); When the vehicle is loaded and the drive axle load is less than the set axle load: The height valve (7) sends a second electrical signal to the ECU (2). If the second electrical signal received by the ECU (2) lasts for a preset time, the ECU (2) controls the first air outlet (13) of the solenoid valve (4) to communicate with the third air outlet (11), so that the gas in the lifting airbag (5) is discharged through the third air outlet (11), and the second air outlet (12) is controlled to be in a closed state, so that the left airbag (6) and the right airbag (8) are not inflated. In the current state, the lifting bridge is only lowered but does not carry any load. When the vehicle is unloaded: The height valve (7) sends a first electrical signal to the ECU (2). If the first electrical signal received by the ECU (2) lasts for a preset time, the ECU (2) controls the first air outlet (13) of the solenoid valve (4) to open and connect with the air inlet (10) to inflate the lifting airbag (5), and controls the second air outlet (12) to connect with the third air outlet (11) to discharge the gas in the left airbag (6) and the right airbag (8) through the third air outlet (11).

2. The intelligent control system for load of a truck lifting bridge according to claim 1, characterized in that: When the vehicle is loaded and the drive axle load is not less than the set axle load: The altitude valve (7) sends a third electrical signal to the ECU (2). If the third electrical signal received by the ECU (2) lasts for a preset time, the ECU (2) controls the second air outlet (12) of the electromagnetic valve (4) to open and connect with the air inlet (10) to inflate the left airbag (6) and the right airbag (8). When the air pressure in the left airbag (6) and the right airbag (8) is greater than the preset air pressure and lasts for a set time, the ECU (2) controls the second air outlet (12) of the electromagnetic valve (4) to close to stop inflating the left airbag (6) and the right airbag (8).

3. The intelligent control system for load of a truck lifting bridge as claimed in claim 2, characterized in that: The right airbag (8) is provided with an air pressure sensor (9), which is used to sense the air pressure in the right airbag (8) and feed back the sensed air pressure signal to the ECU (2).

4. The intelligent control system for load of a truck lifting bridge according to claim 1, characterized in that: One end of the height valve (7) is fixed on the driving axle, and the other end is fixed on the vehicle frame.

5. The intelligent control system for load of a truck lifting bridge according to claim 1, characterized in that: The system further comprises a rocker switch (1), wherein the rocker switch (1) is electrically connected to the ECU (2).

6. The intelligent control system for load on a truck lifting bridge as claimed in claim 5, characterized in that: When the vehicle speed is lower than the set speed and has lasted for a first preset time, the ECU (2) controls the solenoid valve (4) based on the signal of the rocker switch (1) to control the inflation / deflation of the left airbag (6), the right airbag (8) and the lifting airbag (5).

7. A method for intelligently controlling the load of a truck lifting axle, implemented based on the intelligent control system for the load of a truck lifting axle according to any one of claims 1 to 6, characterized in that: The specific steps include: The ECU (2) obtains the drive axle load based on the sensing of the height valve (7): When the vehicle is in an unloaded state for a preset time, the ECU (2) controls the solenoid valve (4) to inflate the lifting airbag (5) and discharge the gas in the left airbag (6) and the right airbag (8); When the vehicle is in a load-bearing state and the axle load of the drive axle is less than the set axle load, and this state lasts for a preset time, the ECU (2) controls the solenoid valve (4) to discharge the gas in the lifting airbag (5), and at the same time controls the left airbag (6) and the right airbag (8) not to be inflated; When the vehicle is in a load-bearing state and the axle load of the drive axle is not less than the set axle load and has lasted for a preset time, the ECU (2) controls the solenoid valve (4) to inflate the left airbag (6) and the right airbag (8), and when the air pressure in the left airbag (6) and the right airbag (8) is greater than the preset air pressure and has lasted for a set time, the inflation of the left airbag (6) and the right airbag (8) is stopped.

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