Trailer valve endurance test device

Abstract

This invention relates to the field of trailer valve technology, and more particularly to a trailer valve durability testing device, comprising: a controller electrically connected to the electrical control port of the trailer valve; a first air path including an air source and a first pressure regulating valve connected in series, the first pressure regulating valve being connected to the air inlet of the trailer valve; a second air path including a second pressure regulating valve and a first control valve connected in series, the air inlet of the second pressure regulating valve being connected to the air source, and the first control valve being electrically connected to the controller; a third air path including a third pressure regulating valve and a second control valve connected in series, the air inlet of the third pressure regulating valve being connected to the air source, and the second control valve being electrically connected to the controller; a first air reservoir connected to the first air outlet of the trailer valve; and a pressure acquisition component electrically connected to the controller. This invention enables simple and effective durability testing of trailer valves.

Description

Technical Field

[0001] This invention relates to the field of trailer valve technology, and in particular to a trailer valve durability testing device. Background Technology

[0002] As commercial vehicles place increasingly higher demands on safety, high reliability, and low cost, the variety of electronically controlled braking valves for commercial vehicles is growing, including electronically controlled trailer valves. The integration of electronic and traditional pneumatic control functions in trailer valves reduces the piping connecting independent functional valves, decreases the space required for vehicle layout, and significantly lowers overall vehicle costs. However, with the increasing functionality of new trailer valves, the added electronic control functions place higher demands on the reliability of traditional valve bodies, while reliability verification schemes are becoming increasingly complex, making effective durability testing difficult.

[0003] Therefore, a trailer valve durability testing device is needed to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a trailer valve durability testing device that can perform durability testing on trailer valves simply and effectively.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Trailer valve durability testing equipment includes:

[0007] The controller is capable of being electrically connected to the electrical control port of the trailer valve;

[0008] The first air passage includes an air source and a first pressure regulating valve connected in series, wherein the first pressure regulating valve can be connected to the air inlet of the trailer valve.

[0009] The second air passage includes a second pressure regulating valve and a first control valve connected in series. The air inlet of the second pressure regulating valve is connected to the air source. The first control valve is electrically connected to the controller. The control port of the first control valve can be connected to the first control port of the trailer valve. The first control valve can control the trailer valve to connect with the first air passage to intake air or disconnect from the first air passage to exhaust air.

[0010] The third air circuit includes a third pressure regulating valve and a second control valve connected in series. The air inlet of the third pressure regulating valve is connected to the air source. The second control valve is electrically connected to the controller. The control port of the second control valve can be connected to the second control port of the trailer valve. When the first control valve controls the trailer valve to connect with the first air circuit, the second control valve can control the trailer valve to connect with the first air circuit to intake air or disconnect from the first air circuit to exhaust air.

[0011] The first air reservoir is connected to the first air outlet of the trailer valve;

[0012] A pressure acquisition component is electrically connected to the controller, and the pressure acquisition component is used to acquire the air pressure of the first air storage cylinder.

[0013] Furthermore, the controller is equipped with a data acquisition module and a power module. The power module is electrically connected to both the first control valve and the second control valve, and the data acquisition module is electrically connected to the pressure acquisition component.

[0014] Furthermore, it also includes a touch screen, which is electrically connected to the controller.

[0015] Furthermore, the acquisition component includes a pressure transmitter electrically connected to the acquisition module, and the pressure transmitter is connected to the first gas storage tank.

[0016] Furthermore, a second air storage cylinder is connected in series on the first air path. The second air storage cylinder is located downstream of the first pressure regulating valve. Both the second air path and the third air path are connected to the second air storage cylinder.

[0017] Furthermore, the first control valve has a first control position, a second control position, and a third control position. When the first control valve is in the first control position, the trailer valve is connected to the first air circuit; when the first control valve is in the second control position, the trailer valve maintains pressure; and when the first control valve is in the third control position, the gas in the first air reservoir is discharged.

[0018] Furthermore, the second control valve has a fourth control position, a fifth control position, and a sixth control position. When the first control valve is in the first control position, the second control valve is in the fourth control position, and the trailer valve is connected to the first air circuit. When the second control valve is in the fifth control position, the trailer valve maintains pressure. When the second control valve is in the sixth control position, the gas in the first air reservoir is discharged.

[0019] Furthermore, it also includes an exhaust control valve, which is connected to the second exhaust port of the trailer valve.

[0020] Furthermore, it also includes a pressure sensor integrated on the trailer valve, which is electrically connected to the acquisition module and is used to acquire the air pressure of the first air tank.

[0021] Furthermore, the trailer valve is integrated with an electrically controlled pressure reducing valve, an electrically controlled back pressure valve, and an electrically controlled pressure boosting valve connected in series. The electrically controlled pressure reducing valve is connected to the control port of the second control valve, and the electrically controlled pressure boosting valve is connected to the first pressure regulating valve. The air inlet of the electrically controlled pressure boosting valve and the air outlet of the electrically controlled back pressure valve are both connected to the second control port of the trailer valve. The electrically controlled pressure reducing valve, the electrically controlled back pressure valve, and the electrically controlled pressure boosting valve are all electrically connected to the controller, which can control the on / off state of the electrically controlled pressure reducing valve, the electrically controlled back pressure valve, and the electrically controlled pressure boosting valve, respectively.

[0022] The beneficial effects of this invention are:

[0023] This invention provides a trailer valve durability testing device, in which a controller is electrically connected to the trailer valve's electrical control port. A first air path includes an air source and a first pressure regulating valve connected in series, the first pressure regulating valve being connected to the trailer valve's air inlet. A second air path includes a second pressure regulating valve and a first control valve connected in series, the second pressure regulating valve's air inlet being connected to the air source, the first control valve being electrically connected to the controller, and the first control valve's control port being connected to the trailer valve's first control port. The first control valve can control the trailer valve to connect to the first air path for air intake or disconnect from the first air path for air exhaust. A third air path includes a third pressure regulating valve and a second control valve connected in series, the third pressure regulating valve's air inlet being connected to the air source, the second control valve being electrically connected to the controller, and the second control valve's control port being connected to the trailer valve's second control port. When the first control valve controls the trailer valve to connect to the first air path, the second control valve can control the trailer valve to connect to the first air path for air intake or disconnect from the first air path for air exhaust. A first air reservoir is connected to the trailer valve's first air outlet. The pressure acquisition component is electrically connected to the controller and is used to collect the air pressure of the first air reservoir. The first air reservoir simulates the pipeline volume used in a real vehicle. The air pressure collected by the pressure acquisition component is used as a basis for determining the effectiveness of the trailer valve. By controlling the first and second control valves, the connection or disconnection between the trailer valve and the first air circuit is controlled, thereby conducting a durability test. This method provides a simple and effective way to conduct durability tests on trailer valves. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of a trailer valve durability testing device according to the present invention;

[0026] Figure 2 This is a schematic diagram of the trailer valve in a trailer valve durability testing device of the present invention.

[0027] In the picture:

[0028] 1. Controller; 11. Power Module; 12. Data Acquisition Module; 13. Touch Screen; 2. First Air Circuit; 21. Air Source; 22. First Pressure Regulating Valve; 23. Second Air Storage Tank; 3. Second Air Circuit; 31. Second Pressure Regulating Valve; 32. First Control Valve; 4. Third Air Circuit; 41. Third Pressure Regulating Valve; 42. Second Control Valve; 5. Pressure Acquisition Component; 51. Pressure Transmitter; 6. Exhaust Control Valve; 7. First Air Storage Tank; 8. Trailer Valve; 81. Electrically Controlled Pressure Reducing Valve; 82. Electrically Controlled Back Pressure Valve; 83. Electrically Controlled Pressure Boosting Valve. Detailed Implementation

[0029] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0030] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0031] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0032] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0033] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0034] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0035] To enable a simple and effective durability test for trailer valves, such as Figures 1-2 As shown, the present invention provides a trailer valve durability testing device. The trailer valve durability testing device includes a controller 1, a first air passage 2, a second air passage 3, a third air passage 4, a first air storage tank 7, and a pressure acquisition component 5.

[0036] The controller 1 is electrically connected to the electrical control port of the trailer valve 8. The first air passage 2 includes an air source 21 and a first pressure regulating valve 22 connected in series. The first pressure regulating valve 22 is connected to the air inlet of the trailer valve 8. The second air passage 3 includes a second pressure regulating valve 31 and a first control valve 32 connected in series. The air inlet of the second pressure regulating valve 31 is connected to the air source 21. The first control valve 32 is electrically connected to the controller 1. The control port of the first control valve 32 is connected to the first control port of the trailer valve 8. The first control valve 32 can control the trailer valve 8 to connect to the first air passage 2 for air intake or disconnect from the first air passage 2 for air exhaust. The third air passage 4 includes a third pressure regulating valve 41 and a second control valve 42 connected in series. The inlet of the third pressure regulating valve 41 is connected to the air source 21. The second control valve 42 is electrically connected to the controller 1. The control port of the second control valve 42 can be connected to the second control port of the trailer valve 8. When the first control valve 32 controls the trailer valve 8 to connect with the first air passage 2, the second control valve 42 can control the trailer valve 8 to connect with the first air passage 2 to intake air or disconnect from the first air passage 2 to exhaust air. The first air reservoir 7 is connected to the first air outlet of the trailer valve 8. The pressure acquisition component 5 is electrically connected to the controller 1 and is used to acquire the air pressure of the first air reservoir 7.

[0037] The first air reservoir 7 is used to simulate the pipeline volume in actual vehicle use. The air pressure of the first air reservoir 7 is collected by the pressure acquisition component 5 as a basis for judging the effectiveness of the trailer valve 8. By controlling the first control valve 32, the parking brake test can be performed. By controlling the first control valve 32 and the second control valve 42, the connection or disconnection between the trailer valve 8 and the first air circuit 2 can be controlled, thereby conducting a vehicle electronic control failure durability test. In this way, the durability test of the trailer valve 8 can be performed simply and effectively.

[0038] Furthermore, the controller 1 is equipped with a data acquisition module 12 and a power module 11. The power module 11 is electrically connected to both the first control valve 32 and the second control valve 42, and the data acquisition module 12 is electrically connected to the pressure acquisition component 5. The controller 1 controls the first control valve 32 and the second control valve 42 to operate according to the set logic through the power module 11. The controller 1 is responsible for the logic control of the entire experiment and collects and analyzes real-time values ​​from the acquisition component connected to the data acquisition module 12 via communication. In this embodiment, the controller 1 is a PLC. In other embodiments, other microcontrollers, industrial control computers, etc., can also be used as the controller 1, and no further restrictions are imposed here.

[0039] Furthermore, the trailer valve durability testing device also includes a touch screen 13, which is electrically connected to the controller 1. The touch screen 13 is responsible for modifying test parameters, displaying the number of tests, process parameters, and errors. The controller 1 can transmit the collected and control information to the touch screen 13 for display, thereby facilitating the experimenter's understanding of the test status and enabling control and parameter setting.

[0040] Furthermore, the data acquisition component includes a pressure transmitter 51 electrically connected to the acquisition module 12, and the pressure transmitter 51 is connected to the first gas storage cylinder 7. The pressure transmitter 51 acquires the pressure of the first gas storage cylinder 7 and transmits the acquired signal to the acquisition module 12. The acquisition module 12 processes the signal and transmits it to the controller 1. This setup facilitates real-time monitoring of the air pressure in the first gas storage cylinder 7, thereby facilitating the monitoring and analysis of the experiment.

[0041] Furthermore, a second gas storage cylinder 23 is connected in series on the first gas passage 2. The second gas storage cylinder 23 is located downstream of the first pressure regulating valve 22, and both the second gas passage 3 and the third gas passage 4 are connected to the second gas storage cylinder 23. By setting up the second gas storage cylinder 23, the gas from the gas source 21 can be stored, thereby providing a stable gas pressure during subsequent use.

[0042] Furthermore, the first control valve 32 has a first control position, a second control position, and a third control position. When the first control valve 32 is in the first control position, the trailer valve 8 is connected to the first air passage 2; when the first control valve 32 is in the second control position, the trailer valve 8 maintains pressure; and when the first control valve 32 is in the third control position, the gas in the first air reservoir 7 is discharged. In this embodiment, the first control valve 32 is a three-position five-way valve. By controlling the first control valve 32, the trailer valve 8 can be in an inflating, pressure-maintaining, or deflated state, thereby enabling durability testing of the vehicle under parking brake conditions.

[0043] Furthermore, the second control valve 42 has a fourth control position, a fifth control position, and a sixth control position. When the first control valve 32 is in the first control position, the second control valve 42 is in the fourth control position, and the trailer valve 8 is connected to the first air passage 2. When the second control valve 42 is in the fifth control position, the trailer valve 8 maintains pressure; when the second control valve 42 is in the sixth control position, the gas in the first air reservoir 7 is discharged. In this embodiment, the second control valve 42 is a three-position five-way valve. During durability testing, the first control valve 32 is initially in the third control position to ensure the parking state is released. By controlling the second control valve 42, the trailer valve 8 can be in an inflating, pressure-maintaining, or deflated state. Moreover, by setting the first pressure regulating valve 22 and the second pressure regulating valve 31 to different pressures, the trailer valve 8 can be controlled at different control pressures to complete the durability test of the trailer valve 8 under different control pressures.

[0044] Furthermore, the trailer valve durability testing device also includes an exhaust control valve 6, which is connected to the second outlet of the trailer valve 8. In this embodiment, the exhaust control valve 6 is a two-position three-way solenoid valve. The exhaust control valve 6 is used to control whether the second outlet of the trailer valve 8 is connected to the atmosphere, thereby simulating the working condition of pipeline failure between the tractor and the trailer.

[0045] Furthermore, the trailer valve durability testing device also includes a pressure sensor integrated on the trailer valve 8. The pressure sensor is electrically connected to the acquisition module 12 and is used to acquire the gas pressure of the first air storage tank 7. By simultaneously acquiring the gas pressure of the first air storage tank 7 through the pressure transmitter 51 and the pressure sensor, a mutual verification is formed, which can determine whether the pressure sensor has malfunctioned.

[0046] Furthermore, the trailer valve 8 integrates an electrically controlled pressure reducing valve 81, an electrically controlled back pressure valve 82, and an electrically controlled pressure boosting valve 83 connected in series. The electrically controlled pressure reducing valve 81 is connected to the control port of the second control valve 42, and the electrically controlled pressure boosting valve 83 is connected to the first pressure regulating valve 22. The air inlet of the electrically controlled pressure boosting valve 83 and the air outlet of the electrically controlled back pressure valve 82 are both connected to the second control port of the trailer valve 8. The electrically controlled pressure reducing valve 81, the electrically controlled back pressure valve 82, and the electrically controlled pressure boosting valve 83 are all electrically connected to the controller 1, which can control the on / off state of the electrically controlled pressure reducing valve 81, the electrically controlled back pressure valve 82, and the electrically controlled pressure boosting valve 83 respectively. By controlling the electrically controlled pressure reducing valve 81, the electrically controlled back pressure valve 82, and the electrically controlled pressure boosting valve 83, the driving brake in the electronic control state can be tested.

[0047] The following tests were conducted using the trailer valve durability testing device:

[0048] In the first durability test, controller 1 controls the first control valve 32 via power module 11 to switch between the first and third control positions. The number of parking brake cycles in a single parking brake test can be set by N1. The number of N1 cycles should be determined based on the total number of parking brake cycles during the actual vehicle's service life to ensure reliable and accurate parking durability verification. The parking durability inflation / deflation time is adjustable, and the pressure transmitter 51 monitors the air pressure value for each durability test as a basis for detecting and judging whether a problem has occurred.

[0049] In the second endurance test, upon braking commencement, the ground control valve must first be in its first control position, causing the trailer valve 8 to be in the parking release state. Controller 1, through power module 11, controls the second control valve 42 to switch between the fourth and sixth control positions. The number of times endurance test 2 is performed in a single test cycle can be determined by setting N2. The number of times N2 is set should be based on design requirements, as endurance test 2 only occurs under conditions of vehicle electronic control failure and will occur very infrequently in actual vehicle use. The inflation / deflation time for endurance test 2 can be adjusted. The pressure transmitter 51 monitors the air pressure value for each endurance test as a basis for detecting and judging whether a problem has occurred.

[0050] Durability test condition 3, the most important and frequently used function of trailer valve 8, ensures the vehicle's electric braking. To initiate electric braking, the first control valve 32 must be in the first control position, and trailer valve 8 must be in the parking release state. Subsequently, controller 1 activates the electrically controlled pressure reducing valve 81, electrically controlled back pressure valve 82, and electrically controlled pressure boosting valve 83 via power module 11. The number of durability test cycles in a single electric braking test can be set to N3. The number of N3 cycles should be determined based on the number of times the vehicle is electrically controlled during actual use, ensuring the reliability and accuracy of durability test condition 3 verification. The inflation and deflation time for durability test condition 3 can be adjusted. The pressure transmitter 51 monitors the air pressure value for each durability test, serving as a basis for detecting and judging whether any problems have occurred.

[0051] Durability Condition 4 simulates a brake line failure between the tractor and trailer. Controller 1 controls the exhaust control valve 6 via power module 11. The number of durability conditions in a single durability condition 4 test cycle can be set by N4. The number of N4 values ​​must be determined according to the design requirements, because durability condition 4 is a condition that only occurs when the entire vehicle's piping fails due to failure.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A trailer valve durability testing device, characterized in that, include: The controller (1) is electrically connected to the electrical control port of the trailer valve (8); The first air passage (2) includes an air source (21) and a first pressure regulating valve (22) connected in series. The first pressure regulating valve (22) can be connected to the air inlet of the trailer valve (8). The second air passage (3) includes a second pressure regulating valve (31) and a first control valve (32) connected in series. The air inlet of the second pressure regulating valve (31) is connected to the air source (21). The first control valve (32) is electrically connected to the controller (1). The control port of the first control valve (32) can be connected to the first control port of the trailer valve (8). The first control valve (32) can control the trailer valve (8) to connect with the first air passage (2) to intake air or disconnect from the first air passage (2) to exhaust air. The third air passage (4) includes a third pressure regulating valve (41) and a second control valve (42) connected in series. The air inlet of the third pressure regulating valve (41) is connected to the air source (21). The second control valve (42) is electrically connected to the controller (1). The control port of the second control valve (42) can be connected to the second control port of the trailer valve (8). When the first control valve (32) controls the trailer valve (8) to be connected to the first air passage (2), the second control valve (42) can control the trailer valve (8) to be connected to the first air passage (2) to intake air or disconnected from the first air passage (2) to exhaust air. The first air storage tank (7) is connected to the first air outlet of the trailer valve (8); The pressure acquisition component (5) is electrically connected to the controller (1) and is used to acquire the air pressure of the first air storage cylinder (7). The first control valve (32) has a first control position, a second control position and a third control position. When the first control valve (32) is in the first control position, the trailer valve (8) is connected to the first air passage (2). When the first control valve (32) is in the second control position, the trailer valve (8) maintains pressure. When the first control valve (32) is in the third control position, the gas in the first air storage tank (7) is discharged. The second control valve (42) has a fourth control position, a fifth control position and a sixth control position. When the first control valve (32) is in the first control position, the second control valve (42) is in the fourth control position, and the trailer valve (8) is connected to the first air passage (2). When the second control valve (42) is in the fifth control position, the trailer valve (8) maintains pressure. When the second control valve (42) is in the sixth control position, the gas in the first air storage tank (7) is discharged. The trailer valve (8) is equipped with an electrically controlled pressure reducing valve (81), an electrically controlled back pressure valve (82), and an electrically controlled pressure boosting valve (83) connected in series. The electrically controlled pressure reducing valve (81) is connected to the control port of the second control valve (42), and the electrically controlled pressure boosting valve (83) is connected to the first pressure regulating valve (22). The air inlet of the electrically controlled pressure boosting valve (83) and the air outlet of the electrically controlled back pressure valve (82) are both connected to the second control port of the trailer valve (8). The electrically controlled pressure reducing valve (81), the electrically controlled back pressure valve (82), and the electrically controlled pressure boosting valve (83) are all electrically connected to the controller (1). The controller (1) can control the on / off state of the electrically controlled pressure reducing valve (81), the electrically controlled back pressure valve (82), and the electrically controlled pressure boosting valve (83) respectively.

2. The trailer valve durability testing device according to claim 1, characterized in that, The controller (1) is equipped with a data acquisition module (12) and a power module (11). The power module (11) is electrically connected to the first control valve (32) and the second control valve (42). The data acquisition module (12) is electrically connected to the pressure acquisition component (5).

3. The trailer valve durability testing device according to claim 2, characterized in that, It also includes a touch screen (13), which is electrically connected to the controller (1).

4. The trailer valve durability testing device according to claim 2, characterized in that, The pressure acquisition component includes a pressure transmitter (51) electrically connected to the acquisition module (12), and the pressure transmitter (51) is connected to the first gas storage tank (7).

5. The trailer valve durability testing device according to claim 1, characterized in that, A second air storage cylinder (23) is connected in series on the first air passage (2). The second air storage cylinder (23) is located downstream of the first pressure regulating valve (22). The second air passage (3) and the third air passage (4) are both connected to the second air storage cylinder (23).

6. The trailer valve durability testing device according to claim 1, characterized in that, It also includes an exhaust control valve (6), which is connected to the second outlet of the trailer valve (8).

7. The trailer valve durability testing device according to claim 2, characterized in that, It also includes a pressure sensor, which is integrated on the trailer valve (8) and electrically connected to the acquisition module (12). The pressure sensor is used to acquire the air pressure of the first air tank (7).

Images