EBS solenoid valve assembly test tool

Abstract

The utility model discloses an EBS solenoid valve assembly test tool comprising a pedestal which is provided with an air inlet cavity, an exhaust cavity and a pressure preparation cavity which are communicated with each other; an air inlet, an air outlet, an exhaust port and a control port are further formed in the base; an air inlet electromagnetic valve, an exhaust electromagnetic valve and a pressure preparation electromagnetic valve are further mounted on the base; the air inlet electromagnetic valve is installed on the air inlet cavity, the air exhaust electromagnetic valve is installed on the air exhaust cavity, and the pressure preparation electromagnetic valve is installed on the pressure preparation cavity. According to the EBS solenoid valve assembly test tool provided by the utility model, the problem that the performance of an EBS front / rear axle proportional solenoid valve assembly cannot be tested independently is solved, and various performances of an air inlet solenoid valve, an exhaust solenoid valve and a pressure preparation solenoid valve in the EBS front / rear axle proportional solenoid valve assembly can be tested independently; the testable test items comprise a flow test, a sealing performance test, a starting voltage and release voltage test, a response time test, a pressure characteristic test and the like.

Description

Technical Field

[0001] This utility model relates to the field of vehicle testing technology, specifically to a testing fixture for an EBS solenoid valve assembly. Background Technology

[0002] With increasing market demand and stricter regulations, the functions and performance of active safety systems for heavy-duty vehicles are constantly improving. As a crucial component of the braking system, the EBS (Electronic Braking System) provides heavy-duty trucks with rapid, stable, and appropriate braking force distribution, further enhancing their active safety performance and enabling them to possess excellent deceleration and braking capabilities. Simultaneously, the EBS system's execution unit is essentially a combination of an electronically controlled proportional solenoid valve and a mechanical valve body. The proportional solenoid valve controls and switches the valve body, while the mechanical valve body performs the braking function of the brake air circuit.

[0003] However, the existing technology lacks a device that can separately test the performance of the EBS front / rear axle proportional solenoid valves. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a testing fixture for EBS solenoid valve assemblies, thereby solving the problem of the lack of a device capable of separately testing the performance of EBS front / rear axle proportional solenoid valves.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an EBS solenoid valve assembly test fixture, including a base, wherein an air intake chamber, an exhaust chamber and a pressure reserve chamber are sequentially opened on the base.

[0006] The base is also provided with an air inlet, an air outlet, an exhaust outlet, and a control port.

[0007] The air inlet is connected to the outside and the air inlet chamber; the air outlet is connected to the outside and the upper part of the exhaust chamber; the exhaust port is connected to the outside and the lower part of the exhaust chamber; and the control port is connected to the outside and the backup pressure chamber.

[0008] The base is also equipped with an intake solenoid valve, an exhaust solenoid valve, and a backup pressure solenoid valve.

[0009] The intake solenoid valve is installed on the intake chamber, the exhaust solenoid valve is installed on the exhaust chamber, and the backup pressure solenoid valve is installed on the backup pressure chamber.

[0010] This utility model also has the following technical features:

[0011] Support blocks are installed at both ends of the top surface of the base, a coil fixing frame is installed at the top of the support blocks, and a coil mounting frame is installed between the support blocks. The intake solenoid valve, exhaust solenoid valve and backup pressure solenoid valve are installed on the coil mounting frame.

[0012] The air inlet and the air inlet chamber are connected by a first channel.

[0013] The lower part of the air intake chamber and the upper part of the exhaust chamber are connected by a second channel.

[0014] The exhaust port and the lower part of the exhaust chamber are connected by a third channel.

[0015] The upper part of the exhaust chamber and the lower part of the backup pressure chamber are connected by a fourth channel.

[0016] The air outlet and the upper part of the exhaust chamber are connected by a fifth channel.

[0017] The control port is connected to the upper part of the backup pressure chamber via a sixth channel.

[0018] The EBS solenoid valve assembly test fixture also includes a sensor assembly, which is mounted on a coil mounting bracket.

[0019] The sensor assembly is connected to the air inlet, air outlet, exhaust outlet, and control port.

[0020] The intake solenoid valve and exhaust solenoid valve are normally closed valves, while the backup pressure solenoid valve is normally open valve.

[0021] Compared with the prior art, this utility model has the following technical effects:

[0022] (I) The EBS solenoid valve assembly testing fixture provided by this utility model solves the problem that the performance of the EBS front / rear axle proportional solenoid valve assembly cannot be tested independently, and can independently test the performance of the intake solenoid valve, exhaust solenoid valve and backup pressure solenoid valve in the EBS front / rear axle proportional solenoid valve assembly; the testable items include: flow test, sealing performance test, starting voltage and release voltage test, response time test, pressure characteristic test, etc.

[0023] (II) The EBS solenoid valve assembly test fixture provided by this utility model eliminates the influence of the mechanical valve body's movement and response on the proportional solenoid valve during testing, and more accurately measures the individual characteristics of the proportional solenoid valve; the separate test scheme helps to gain a deeper understanding of the proportional solenoid valve product characteristics while eliminating the influence of the mechanical valve body, and can accurately determine the failure location of the product during fault diagnosis, thus improving efficiency; it is compact in size and can be placed in various environments and test benches to conduct tests under various working conditions.

[0024] (III) The EBS solenoid valve assembly test fixture provided by this utility model has a simple structure, is easy to install, easy to operate, safe and reliable, and highly adaptable, which effectively solves the existing problems. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the EBS solenoid valve assembly test fixture of this utility model.

[0026] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0027] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure in the YY direction.

[0028] The meanings of the labels in the attached diagram are as follows:

[0029] 1-Base, 2-Intake chamber, 3-Exhaust chamber, 4-Pressure chamber, 5-Intake port, 6-Outlet port, 7-Exhaust port, 8-Control port, 9-Intake solenoid valve, 10-Exhaust solenoid valve, 11-Pressure chamber solenoid valve, 12-Support block, 13-Coil fixing bracket, 14-Coil mounting bracket, 15-First channel, 16-Second channel, 17-Third channel, 18-Fourth channel, 19-Fifth channel, 20-Sixth channel, 21-Sensor assembly, 22-Circuit board, 23-Circuit board protective shell.

[0030] 24-Intake solenoid coil assembly, 25-Intake solenoid valve moving iron core, 26-Exhaust solenoid coil assembly, 27-Exhaust solenoid valve moving iron core, 28-Exhaust solenoid valve spring, 29-Exhaust solenoid valve seat, 30-Backup pressure valve solenoid coil assembly, 31-Backup pressure valve moving iron core, 32-Intake solenoid valve spring, 33-Intake solenoid valve seat.

[0031] The specific content of this utility model will be further explained in detail below with reference to the embodiments. Detailed Implementation

[0032] Unless otherwise specified, all components in this invention are made from components known in the prior art.

[0033] The following are specific embodiments of the present invention. It should be noted that the present invention is not limited to the following specific embodiments. All equivalent modifications made based on the technical solutions of this application fall within the protection scope of the present invention.

[0034] Example 1:

[0035] This embodiment provides a test fixture for an EBS solenoid valve assembly, such as... Figures 1-3As shown, it includes a base 1, on which an air intake chamber 2, an exhaust chamber 3, and a pressure reserve chamber 4 are sequentially opened.

[0036] The base 1 is also provided with an air inlet 5, an air outlet 6, an exhaust outlet 7, and a control port 8.

[0037] The air inlet 5 is connected to the outside and the air inlet chamber 2, the air outlet 6 is connected to the outside and the upper part of the exhaust chamber 3, the exhaust outlet 7 is connected to the outside and the lower part of the exhaust chamber 3, and the control port 8 is connected to the outside and the backup pressure chamber 4.

[0038] The base 1 is also equipped with an intake solenoid valve 9, an exhaust solenoid valve 10, and a backup pressure solenoid valve 11.

[0039] The intake solenoid valve 9 is installed on the intake chamber 2, the exhaust solenoid valve 10 is installed on the exhaust chamber 3, and the backup pressure solenoid valve 11 is installed on the backup pressure chamber 4.

[0040] This embodiment is specifically designed for the proportional solenoid valve assembly in the EBS front / rear axle braking control module, and its installation and fitting dimensions are consistent with those of the EBS front / rear axle braking control module.

[0041] This embodiment uses separate air intake, exhaust, and control ports, which can realize the separate air intake, exhaust, and exhaust functions of the air intake solenoid valve, exhaust solenoid valve, and backup pressure solenoid valve.

[0042] In this embodiment, the solenoid valves are interconnected by air passages, and their arrangement and inner diameter are consistent with the EBS front / rear axle braking control module, ensuring that their working conditions are consistent with the actual working conditions of EBS.

[0043] The coil holder and fixing bolts are borrowed from parts on EBS products and serve to fix the solenoid valve assembly. The sample is easy to disassemble and only requires two fixing bolts.

[0044] Each air inlet, outlet, exhaust port, and control port can be connected to an external sensor for air pressure monitoring.

[0045] The tooling is compact and easy to move. It can be placed in an environmental test chamber for high and low temperature testing or moved to a vibration test bench for vibration testing, meeting the testing needs of various environments.

[0046] As a preferred embodiment:

[0047] Support blocks 12 are installed at both ends of the top surface of the base 1. A coil fixing frame 13 is installed at the top of the support block 12. A coil mounting frame 14 is installed between the support blocks 12. The intake solenoid valve 9, the exhaust solenoid valve 10 and the backup pressure solenoid valve 11 are installed on the coil mounting frame 14.

[0048] As a preferred embodiment:

[0049] The air inlet 5 and the air inlet chamber 2 are connected by a first channel 15.

[0050] The lower part of the air intake chamber 2 and the upper part of the exhaust chamber 3 are connected by a second channel 16.

[0051] The exhaust port 7 and the lower part of the exhaust chamber 3 are connected by a third channel 17.

[0052] The upper part of the exhaust chamber 3 and the lower part of the backup pressure chamber 4 are connected by a fourth channel 18.

[0053] The air outlet 6 and the upper part of the exhaust chamber 3 are connected by a fifth channel 19.

[0054] The control port 8 is connected to the upper part of the pressure chamber 4 via a sixth channel 20.

[0055] As a preferred embodiment:

[0056] The EBS solenoid valve assembly test fixture also includes a sensor assembly 21, which is mounted on the coil mounting bracket 14 and is used to measure the pressure inside the brake working chamber.

[0057] The sensor assembly 21 is connected to the air inlet 5, the air outlet 6, the exhaust outlet 7, and the control port 8.

[0058] As a preferred embodiment:

[0059] The top of the support block 12 is also equipped with a circuit board 22, and the top of the circuit board 22 is equipped with a circuit board protective shell 23. The circuit board is used to integrate the control circuits of each solenoid valve.

[0060] As a preferred embodiment:

[0061] The intake solenoid valve 9 and exhaust solenoid valve 10 are normally closed valves, while the backup pressure solenoid valve 11 is a normally open valve.

[0062] The specific usage method of this embodiment is as follows:

[0063] Electrical control operating status: Intake solenoid valve is energized, exhaust solenoid valve is de-energized, and backup pressure solenoid valve is energized.

[0064] The air inlet 5 and the control port 8 are connected to a stable high-pressure air source. The air intake solenoid coil assembly 24 is energized, and the electromagnetic force attracts the moving iron core 25 of the air intake solenoid valve to move upward, opening the air intake channel (the first channel 15 is connected to the second channel 16), so that compressed air enters the exhaust chamber 3 (connected to the air outlet 6).

[0065] When the exhaust solenoid coil assembly 26 is de-energized, the moving iron core 27 of the exhaust solenoid valve is pressed tightly against the valve seat 29 of the exhaust solenoid valve under the spring force of the exhaust solenoid valve spring 28, thus closing the exhaust passage (the third passage 17 and the fifth passage 19 are closed).

[0066] When the backup pressure valve solenoid coil assembly 30 is energized, the electromagnetic force attracts the moving iron core 31 of the backup pressure solenoid valve to move downward, thus closing the backup pressure air passage (the fourth channel 18 and the sixth channel 20 are closed).

[0067] The air source passes from the air inlet 5 through the air inlet solenoid valve 9 to the air outlet 6, and the pressure inside the air outlet 6 can be read by the sensor assembly 21.

[0068] The operating status of each solenoid valve under normal electrically controlled braking conditions was tested, which is the operating state for realizing the EBS braking function. The pressure boost response characteristics of the solenoid valve group under electrically controlled conditions were also tested.

[0069] Exhaust status: Intake solenoid valve is de-energized, exhaust solenoid valve is energized, and standby pressure solenoid valve is energized.

[0070] When the air inlet 5 and the control port 8 are connected to a stable high-pressure air source, the air intake solenoid coil assembly 24 is de-energized, and the moving iron core 25 of the air intake solenoid valve moves downward under the spring force of the air intake solenoid valve spring 32 and is in close contact with the air intake solenoid valve 33 (the first channel 15 and the second channel 16 are closed).

[0071] When the exhaust solenoid coil assembly 26 is energized, the moving iron core 27 of the exhaust solenoid valve moves upward under the action of electromagnetic force, opening the third channel 17 (which is connected to the exhaust port 6) between the exhaust chamber 3 and the exhaust port 7 (the third channel 17 is connected to the fifth channel 19).

[0072] When the backup pressure valve solenoid coil assembly 30 is energized, the electromagnetic force attracts the moving iron core 31 of the backup pressure solenoid valve to move downward, thus closing the backup pressure air passage (the fourth channel 18 and the sixth channel 20 are closed).

[0073] The brake working chamber (not shown in the figure) is connected to the air outlet 6, and the compressed air in the brake working chamber flows out from the exhaust port 7 through the exhaust solenoid valve 10.

[0074] The operating status of each solenoid valve in the EBS solenoid valve under electrically controlled conditions without braking was tested. This represents the operating status of the EBS solenoid valve when the braking function is not applied. The pressure reduction response characteristics of the solenoid valve assembly under electrically controlled conditions were also examined.

[0075] Operating status of the backup pressure valve: Intake solenoid valve de-energized, exhaust solenoid valve de-energized, backup pressure solenoid valve de-energized.

[0076] When the air inlet 5 and the control port 8 are connected to a stable high-pressure air source, the air intake solenoid coil assembly 24 is de-energized, and the moving iron core 25 of the air intake solenoid valve moves downward under the spring force of the air intake solenoid valve spring 32 and is in close contact with the valve seat 33 of the air intake solenoid valve (the first channel 15 and the second channel 16 are closed).

[0077] When the exhaust solenoid coil assembly 26 is de-energized, the moving iron core 27 of the exhaust solenoid valve is pressed tightly against the valve seat 29 of the exhaust solenoid valve under the spring force of the exhaust solenoid valve spring 28, thus closing the exhaust passage (the third passage 17 and the fifth passage 19 are closed).

[0078] When the backup pressure valve solenoid coil assembly 30 is de-energized, the moving iron core 31 of the backup pressure solenoid valve moves upward by the spring force of the backup pressure solenoid valve spring 21, and the moving iron core 31 of the backup pressure solenoid valve separates from the stationary iron core 23 of the backup pressure solenoid valve, opening the backup pressure channel (the fourth channel 18 is connected to the sixth channel 20).

[0079] The air source passes through the control port 8, the backup pressure solenoid valve 11, and the air outlet 6 directly to the brake working chamber.

[0080] The operating status of each solenoid valve was tested when the EBS solenoid valve performed braking under power-off conditions. This represents the operating status of the EBS solenoid valve when it achieves braking function under power-off conditions. The pressure boost response characteristics of the solenoid valve assembly in standby mode were also tested.

[0081] Exhaust valve operating independently: Intake solenoid valve de-energized, exhaust solenoid valve energized, backup pressure solenoid valve energized.

[0082] When the outlet 6 is connected to a stable high-pressure air source, the intake solenoid coil assembly 24 is de-energized, and the moving iron core 25 of the intake solenoid valve moves downward under the spring force of the intake solenoid valve spring 32 and is in close contact with the intake solenoid valve valve 33 (the first channel 15 and the second channel 16 are closed).

[0083] When the exhaust solenoid coil assembly 26 is energized, the moving iron core 27 of the exhaust solenoid valve moves upward under the action of electromagnetic force, opening the air passage between the brake working chamber and the exhaust port 7 (the third channel 17 and the fifth channel 19 in the figure are connected).

[0084] When the backup pressure valve solenoid coil assembly 30 is energized, the electromagnetic force attracts the moving iron core 31 of the backup pressure solenoid valve to move downward, thus closing the backup pressure air passage (the fourth channel 18 and the sixth channel 20 are closed).

[0085] The air source passes from the air outlet 6 through the exhaust solenoid valve 10 to the exhaust port 7, and its intake pressure can be read by the sensor assembly 21.

[0086] The exhaust solenoid valve was tested separately to evaluate its working condition.

[0087] The air outlet 6 is connected to the brake working chamber. That is, the air outlet 6 in the figure is the inlet of the brake working chamber (the brake working chamber is not shown in the figure. The air path is air source - test fixture - brake working chamber to form a closed loop). The result of all the actions of the test fixture is whether the brake working chamber is ventilated. In the actual function of EBS, it is whether the brake working chamber achieves braking due to the presence of compressed air.

[0088] The above technical solutions are only preferred embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be conceived by those skilled in the art without creative effort within the technical scope disclosed in this utility model are covered within the protection scope of this utility model.

Claims

1. A testing fixture for an EBS solenoid valve assembly, comprising a base (1), characterized in that, The base (1) is provided with an air intake chamber (2), an exhaust chamber (3) and a pressure reserve chamber (4) connected in sequence. The base (1) is also provided with an air inlet (5), an air outlet (6), an exhaust outlet (7) and a control port (8); The air inlet (5) is connected to the outside and the air inlet chamber (2), the air outlet (6) is connected to the outside and the upper part of the exhaust chamber (3), the exhaust port (7) is connected to the outside and the lower part of the exhaust chamber (3), and the control port (8) is connected to the outside and the backup pressure chamber (4). The base (1) is also equipped with an intake solenoid valve (9), an exhaust solenoid valve (10) and a backup solenoid valve (11). The intake solenoid valve (9) is installed on the intake chamber (2), the exhaust solenoid valve (10) is installed on the exhaust chamber (3), and the backup pressure solenoid valve (11) is installed on the backup pressure chamber (4). Support blocks (12) are installed at both ends of the top surface of the base (1). A coil fixing frame (13) is installed at the top of the support block (12). A coil mounting frame (14) is installed between the support blocks (12). The intake solenoid valve (9), exhaust solenoid valve (10) and backup pressure solenoid valve (11) are installed on the coil mounting frame (14). The air inlet (5) and the air inlet chamber (2) are connected by a first channel (15); The lower part of the air intake chamber (2) and the upper part of the exhaust chamber (3) are connected by a second channel (16); The exhaust port (7) and the lower part of the exhaust chamber (3) are connected by a third channel (17); The upper part of the exhaust chamber (3) and the lower part of the pressure chamber (4) are connected by a fourth channel (18); The air outlet (6) and the upper part of the exhaust chamber (3) are connected by a fifth channel (19); The control port (8) is connected to the upper part of the pressure chamber (4) through a sixth channel (20); The EBS solenoid valve assembly test fixture also includes a sensor assembly (21), which is mounted on a coil mounting bracket (14); The sensor assembly (21) is connected to the air inlet (5), the air outlet (6), the exhaust outlet (7), and the control port (8); The intake solenoid valve (9) and exhaust solenoid valve (10) are normally closed valves, and the backup pressure solenoid valve (11) is a normally open valve.

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