Fault simulation apparatus

Abstract

The application provides a fault simulation device, and relates to the technical field of automobile design.The fault simulation device comprises four air springs, a combination valve in communication with the four air springs through four air supply paths, the combination valve being used for controlling the on-off of each air supply path, an air pump in communication with the combination valve through a pump valve path, the air pump being used for supplying air to the combination valve to supply air to the four air springs, and a fault simulation mechanism arranged in at least one of the four air supply paths and the pump valve path, the fault simulation mechanism being used for changing the air pressure of the path where the fault simulation mechanism is arranged when started to simulate a fault of the path where the fault simulation mechanism is arranged.The fault simulation device avoids the problem that the software simulation fault simulation in the prior art is insufficient, avoids the problem that a long development cycle is required when a test vehicle is used for fault simulation diagnosis, improves the fault simulation and diagnosis efficiency of the air suspension, and thus can shorten the development and design cycle of the air suspension and the automobile.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile design, and in particular to a fault simulation device. BACKGROUND

[0002] In the prior art, some automobiles have air suspensions, that is, suspensions with air springs. During driving, various faults may occur in the air suspensions. It is only required to simulate the faults in the design stage of the automobile to avoid these faults when the automobile is put into use. However, in the prior art, software simulation fault simulation and test vehicle fault diagnosis simulation are adopted. The former simulation is not sufficient, and the latter simulation has a long development cycle. SUMMARY

[0003] Therefore, the present application provides a fault simulation device to solve the above technical problems.

[0004] The present application provides a fault simulation device, which comprises:

[0005] four air springs;

[0006] a combination valve, which is in communication with the four air springs via four air supply paths, and is used to control the opening and closing of each air supply path;

[0007] a gas pump, which is in communication with the combination valve via a pump valve path, and is used to supply air to the combination valve to supply air to the four air springs;

[0008] a fault simulation mechanism, which is arranged in at least one of the four air supply paths and the pump valve path, and is arranged to change the air pressure of the path where the fault simulation mechanism is located when the fault simulation mechanism is started, so as to simulate a fault in the path where the fault simulation mechanism is located.

[0009] Preferably, the fault simulation mechanism is arranged in each air supply path and the pump valve path,

[0010] The fault simulation mechanism on each air supply path comprises a first fault component, which is used to simulate that the combination valve cannot supply air to the each air supply path.

[0011] Preferably, the first fault component comprises:

[0012] a first valve, which is arranged in the each air supply path and is used to open and close the each air supply path;

[0013] a first fault path, two ends of the first fault path are respectively connected to an upstream side of the first valve and a downstream side of the first valve, and the first fault path can be opened and closed.

[0014] Preferably, the fault simulation mechanism on each gas supply line further includes a second fault component, and the second fault component is used to simulate the combination valve being not tightly closed and the combination valve being accidentally opened.

[0015] Preferably, the second fault component includes:

[0016] The second fault gas circuit, one end of the second fault gas circuit is unidirectionally connected to the first fault gas circuit, the direction of the unidirectional connection is from the first fault gas circuit to the second fault gas circuit, the other end of the second fault gas circuit is connected to the atmosphere, the second fault gas circuit is set to be able to open and close, and the opening degree of the second fault gas circuit can be adjusted.

[0017] Preferably, the second fault component further includes:

[0018] The third fault gas circuit, one end of the third fault gas circuit is unidirectionally connected to the first fault gas circuit, the direction of the unidirectional connection is from the first fault gas circuit to the third fault gas circuit, the other end of the second fault gas circuit is connected to the atmosphere, and the second fault gas circuit is set to be able to open and close.

[0019] Preferably, the fault simulation device further comprises an extended air path connected between the first fault component and the air spring, and the fault simulation mechanism on each air supply path further comprises a third fault component, and the third fault component is used to simulate slow air leakage of the air spring;

[0020] Wherein, the third fault component includes an air pumping component and a valve component, the air pumping component is arranged at the end of the extended air path, the valve component is arranged on the upstream side of the air pumping component, and the valve component is used to control the opening and closing of the extended air path.

[0021] Preferably, the fault simulation mechanism on each air supply path further includes a fourth fault component, the fourth fault component is arranged in the extension air path, and the fourth fault component is used to simulate the burst of the air spring.

[0022] Preferably, the fault simulation device further includes an air tank, which is connected to the combination valve via an air storage gas path, and the air storage gas path is provided with the fault simulation mechanism, which includes a first fault component, a second fault component, a third fault component and a fourth fault component.

[0023] Preferably, the fault simulation device further includes a flow sensor and a pressure sensor, and the gas circuit where the fault simulation mechanism is located is provided with the flow sensor and the pressure sensor.

[0024] According to the fault simulation device provided by the present application, four air springs are used to simulate the air springs on the air suspension in the actual vehicle, and the fault simulation mechanism is set in at least one of the four air supply paths and the pump valve path. The fault simulation mechanism is set to change the air pressure of the path where the fault simulation mechanism is located when it is started, so as to simulate a fault in the path where the fault simulation mechanism is located. This not only avoids the problem of insufficient fault simulation using only software simulation in the prior art, but also optimizes the software simulation according to the fault simulation device, and avoids the problem of a long development cycle when using a test vehicle for fault simulation diagnosis, thereby improving the fault simulation and diagnosis efficiency of the air suspension, and thus shortening the development and design cycle of the air suspension and the automobile.

[0025] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram showing a fault simulation device provided according to an embodiment of the present application with some components omitted is shown;

[0028] Figure 2 A schematic diagram of a fault simulation device provided according to an embodiment of the present application is shown;

[0029] Figure 3 A schematic diagram showing the relevant structure of the air supply circuit of the fault simulation device provided according to an embodiment of the present application;

[0030] Figure 4 A schematic diagram showing the relevant structure of the pump valve gas circuit of the fault simulation device provided according to an embodiment of the present application;

[0031] Figure 5 A schematic diagram showing the relevant structure of the gas storage circuit of the fault simulation device provided according to an embodiment of the present application is shown.

[0032] Reference numerals:

[0033] 100-air pump; 110-flow sensor; 120-pressure sensor;

[0034] 200-gas distribution valve; 210-pump valve gas circuit;

[0035] 300 - first faulty component; 310 - first faulty gas path; 320 - first valve; 330 - second valve; 340 - third valve; 350 - fourth valve;

[0036] 400 - second fault component; 410 - second fault air path; 420 - one-way valve; 430 - fifth valve; 440 - sixth valve; 450 - third fault air path; 460 - seventh valve;

[0037] 500-third fault component; 510-hydraulic cylinder; 520-eighth valve;

[0038] 600-Fourth fault component; 610-Ninth valve; 620-Tenth valve;

[0039] 700-air spring; 710-air supply line; 720-first end valve;

[0040] 800-gas storage tank; 810-water filling stop valve; 820-exhaust stop valve; 830-liquid level display; 840-drain stop valve; 850-overflow valve; 860-safety valve; 870-pressure gauge; 880-gas storage line; 890-second end valve. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solution of this application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0042] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this application and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0044] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0045] According to an embodiment of the present application, a fault simulation device is provided, which includes an air pump 100, a flow sensor 110, a pressure sensor 120, an air path distribution valve 200, a pump valve air path 210, a first fault component 300, a second fault component 400, a third fault component 500, a fourth fault component 600, an air spring 700 and an air tank 800. Figures 1 to 5 The structure and working principle of the fault simulation device are described in detail.

[0046] like Figure 1 As shown, Figure 1 A schematic diagram of a fault simulation device according to an embodiment of the present application omitting some structures is given in FIG. Figure 1 The main architecture of the fault simulation device is shown in FIG. In an embodiment, the fault simulation device may include an air pump 100, a combination valve, and four air springs 700. In an embodiment, the air pump 100 is used to inflate or deflate the air springs 700 and the air storage tank 800. The air pump 100 and the combination valve are connected via a pump-valve air path 210. The combination valve is used to implement air path distribution. The combination valve may include six valve ports, four of which are connected to the four air springs 700 via the air supply air path 710, and the other two of the six valve ports are connected to the air pump 100 and the air storage tank 800 via the aforementioned pump-valve air path 210 and the air storage air path. As an example, the combination valve may include five integrated solenoid valves, which respectively control the on / off of five air paths, namely, four air supply air paths 710 and one air storage air path.

[0047] In addition, in an embodiment, pressure sensors 120 and flow sensors 110 can be provided on the above-mentioned four air supply circuits 710, one air storage circuit, and the pump valve circuit 210, wherein the flow sensor 110 can be used to monitor the flow value of each branch air circuit to determine whether the air circuit is flowing normally. When the air circuit is blocked, the flow sensor 110 is the default value, and the pressure sensor 120 can be used to monitor the air circuit pressure value to determine whether the air circuit is leaking.

[0048] As an example, based on the above gas path layout, four air springs 700 can be used as gas carriers to simulate the four air springs 700 in the air suspension of a real vehicle, for example, see Figure 1 , Figure 1In the embodiment, the air spring 700 on the upper left may be the front right air spring 700 of a real vehicle, the air spring 700 on the lower left may be the front left air spring 700 of a real vehicle, the air spring 700 on the upper right may be the rear right air spring 700 of a real vehicle, and the air spring 700 on the lower right may be the rear left air spring 700 of a real vehicle. In the embodiment, fault components are provided on the air path to simulate faults. In the embodiment, the fault components are the first fault component 300, the second fault component 400, the third fault component 500 and the fourth fault component 600. As an example, Figure 3 As shown, Figure 3 Schematic diagram showing the relevant structure of the gas supply circuit 710. Each gas supply circuit 710 is provided with a first fault component 300, a second fault component 400, a third fault component 500 and a fourth fault component 600. Figure 4 As shown, the pump valve gas circuit 210 is provided with a first fault component 300 and a fourth fault component 600, as shown in FIG. Figure 5 As shown, the gas storage circuit is provided with a first fault component 300, a second fault component 400, a third fault component 500 and a fourth fault component 600. The structure and function of each fault component will be specifically described below by taking the gas supply circuit 710 as an example.

[0049] See also Figure 3 , Figure 3 Shown Figure 1 The air supply circuit 710 of the air spring 700 at the lower left in the middle, the two ends of the air supply circuit 710 are respectively connected to a valve port of the combination valve and the air spring 700 at the lower left. Among them, the first fault component 300 includes a first fault air circuit 310, a first valve 320, a second valve 330, a third valve 340 and a fourth valve 350, wherein the first valve 320, the second valve 330 and the fourth valve 350 can all be manual ball valves, and the manual ball valves are used to manually control the on-off of the air circuit in which they are located. The third valve 340 can be a solenoid valve, and the solenoid valve can be, for example, a two-position two-way solenoid valve, used to control the on-off of the air circuit in which it is located. The manual ball valve and solenoid valve mentioned in the following description can be understood according to the explanations here.

[0050] Still see Figure 3In the first fault component 300, the first valve 320 is arranged in the air supply gas path 710 to control the opening and closing of the air supply gas path 710, the first fault gas path 310 includes two ends, the two ends are connected to the upstream side of the first valve 320 and the downstream side of the first valve 320 respectively, the first fault gas path 310 is sequentially provided with the second valve 330, the third valve 340 and the fourth valve 350, the first fault component 300 is used to simulate that the solenoid valve corresponding to controlling the air supply opening and closing of the air supply gas path 710 in the combination valve (here, the combination valve left front solenoid valve is taken as an example for description below) cannot be opened, during fault simulation, the first valve 320 is closed, the second valve 330 and the fourth valve 350 are opened, and the third valve 340 between the second valve 330 and the fourth valve 350 is closed, at this time, the air pump 100 or the air tank 800 cannot pump air for the air spring 700 of the air supply gas path 710, and it is judged that the combination valve left front solenoid valve cannot be opened.

[0051] It should be noted that the upstream side and the downstream side here are determined according to the flow direction of the gas, taking the air supply gas path 710 as an example, the upstream side is closer to the combination valve, and the downstream side is closer to the air spring 700, the upstream side and the downstream side appearing in the following description should be understood according to the description made here.

[0052] Further referring to Figure 3 , the second fault component 400 includes a second fault gas path 410 and a third fault gas path 450, wherein the second fault gas path 410 includes two ends, one end of the second fault gas path 410 is connected between the third valve 340 and the fourth valve 350, the other end of the second fault gas path 410 is in communication with the atmosphere, the second fault gas path 410 is sequentially provided with a one-way valve 420, a fifth valve 430 and a sixth valve 440, wherein the fifth valve 430 is a solenoid valve, and the sixth valve 440 is a manual ball valve, here, the one-way valve 420 is opened from the side of the fourth valve 350 to the second fault gas path 410. On this basis, the third fault gas path 450 includes two ends, one end of the third fault gas path 450 is connected between the one-way valve 420 and the fifth valve 430, the other end of the third fault gas path 450 is connected to the downstream side of the sixth valve 440, thereby being in communication with the atmosphere, here, the third fault gas path 450 is provided with a seventh valve 460, and the seventh valve 460 is a solenoid valve.

[0053] In this embodiment, the third fault component 500 is used to simulate a lax closure fault of the left front solenoid valve of the combination valve and a fault of the left front solenoid valve of the combination valve accidentally opening. The lax closure fault of the left front solenoid valve of the combination valve is simulated by the second faulty air path 410, and the fault of the left front solenoid valve of the combination valve accidentally opening is simulated by the third air path. In the case of a lax closure fault of the left front solenoid valve of the combination valve, the fourth valve 350 is opened, the sixth valve 440 is slightly opened, and the fifth valve 430 is opened. At this time, gas in the air supply path 710 flows to the atmosphere via the second faulty air path 410. The pressure sensor 120 detects a slow decrease in pressure, thereby determining that the left front solenoid valve is lax, the air pump 100 or the air tank 800 is slowly inflating the air spring 700, and the pressure in the air spring 700 cannot be maintained.

[0054] In the event of an accidental opening failure of the left front solenoid valve of the combination valve, the fourth valve 350 and the seventh valve 460 are opened, and the gas in the air supply path 710 flows to the atmosphere via the third faulty air path 450. At this time, the air supply path 710 between the air spring 700 and the combination valve leaks, and the air pump 100 or the air tank 800 cannot inflate the air spring 700.

[0055] See further Figure 3 The third failure component 500 is disposed downstream of the first failure component 300, that is, closer to the air spring 700. The third failure component 500 includes a hydraulic cylinder 510 and an eighth valve 520. The third failure component 500 is disposed in an extended air path, one end of which is connected to the air supply path 710 and the other end to the hydraulic cylinder 510. The eighth valve 520 is disposed upstream of the hydraulic cylinder 510. In this embodiment, the failure simulation device further includes a first terminal valve 720, which is a manual ball valve and is disposed in the first extended air path, upstream of the eighth valve 520.

[0056] The third fault component 500 is used to simulate the slow leakage fault of the air spring 700. Specifically, the first end valve 720 is opened, the hydraulic cylinder 510 is started and the solenoid valve (here, for example, a two-position three-way solenoid valve) is opened. At this time, the pressure sensor 120 detects that the pressure of the air spring 700 is slowly decreasing, and the flow sensor 110 shows a low reading, and it is judged that the air spring 700 is slowly leaking.

[0057] See further Figure 3The fourth fault component 600 includes a ninth valve 610 and a tenth valve 620. The fault simulation device further includes a second extended air path. The ninth valve 610 and the tenth valve 620 are both disposed in the second extended air path. The ninth valve 610 is disposed upstream of the tenth valve 620. The ninth valve 610 is a manual ball valve, and the tenth valve 620 is a solenoid valve. Furthermore, the second extended air path is connected between the eighth valve 520 and the first end valve 720. In this embodiment, the fourth fault component 600 is used to simulate a burst failure of the air spring 700. Specifically, the first end valve 720, the ninth valve 610, and the tenth valve 620 are opened. Gas in the air supply path 710 flows to the atmosphere via the second extended air path. The pressure sensor 120 detects a rapid decrease in the pressure of the air spring 700, and the flow sensor 110 indicates a high reading. Therefore, it is determined that the air spring 700 has burst.

[0058] On this basis, the other three gas supply paths 710 are similarly provided with the first fault component 300, the second fault component 400, the third fault component 500 and the fourth fault component 600, and the simulated fault conditions are the same, which will not be described again here.

[0059] See also Figure 4 , in an embodiment, Figure 4 The structure associated with the pump-valve air circuit 210 is shown. In an embodiment, the pump-valve air circuit 210 may be provided with a first fault component 300 and a fourth fault component 600. The air circuit of the fourth fault component 600 may be connected between the third valve 340 and the fourth valve 350 of the first fault component 300. Here, the first fault component 300 simulates a blockage in the pump-valve air circuit 210 between the combination valve and the air pump 100 at the same distance as described above. During the fault simulation, a high value jump in the pressure sensor 120 is detected, thereby determining a blockage. The fourth fault component 600 is used to simulate a slow leak between the combination valve and the air pump 100. During the fault simulation, the fourth valve 350 of the first fault component 300 and all valves of the fourth fault component 600 are opened. The high-pressure gas from the air pump 100 cannot be delivered to the spring or the air tank 800 through the combination, thereby determining a slow leak between the combination valve and the air pump 100.

[0060] See also Figure 5 , Figure 5The structure of the gas storage circuit is shown. The gas storage circuit is equipped with a first failure module 300, a second failure module 400, a third failure module 500, and a fourth failure module 600. The first failure module 300 and the second failure module 400 are arranged in the same manner as in the gas supply circuit 710 described above. The third failure module 500 is connected to the gas storage circuit via a second terminal valve (e.g., a manual ball valve). The fourth failure module 600 is arranged downstream of the first failure module 300 and upstream of the third failure module 500. Furthermore, the third failure module 500 is used to simulate a slow leak in the gas tank 800, and the fourth failure module 600 is used to simulate a burst in the gas tank 800. Furthermore, the volume of the gas tank 800 is adjustable by adding water. The gas tank 800 also includes a water filling stop valve 810, an exhaust stop valve 820, a liquid level display 830, a drain stop valve 840, a relief valve 850, a safety valve 860, and a pressure gauge 870.

[0061] The above description is only a preferred embodiment of the present application and does not limit the scope of protection of the present application. All equivalent structural transformations made based on the contents of the present application specification and drawings under the innovative concept of the present application, or direct / indirect application in other related technical fields are included in the scope of protection of the present application.

Claims

1. A fault simulation device, characterized in that: The fault simulation device comprises: four air springs; A combination valve, the combination valve being connected to the four air springs via four air supply paths, and the combination valve being used to control the on / off of each of the air supply paths; an air pump, connected to the combination valve via a pump-valve air path, the air pump being used to supply air to the combination valve so as to supply air to the four air springs; a fault simulation mechanism, provided in at least one of the four air supply paths and the pump valve path, the fault simulation mechanism being configured to change the air pressure of the path where the fault simulation mechanism is located when activated, so as to simulate a fault in the path where the fault simulation mechanism is located; Each air supply circuit and the pump valve circuit are provided with the fault simulation mechanism. The fault simulation mechanism on each gas supply line includes a first fault component, and the first fault component is used to simulate that the combination valve cannot supply gas to each gas supply line. The first fault component includes: a first valve, disposed on each of the gas supply lines, for opening and closing each of the gas supply lines; a first fault gas path, where two ends of the first fault gas path are respectively connected to an upstream side of the first valve and a downstream side of the first valve, and the first fault gas path can be opened and closed; The fault simulation mechanism on each gas supply line further includes a second fault component, which is used to simulate that the combination valve is not tightly closed; The second fault component includes: The second fault gas circuit, one end of the second fault gas circuit is unidirectionally connected to the first fault gas circuit, the direction of the unidirectional connection is from the first fault gas circuit to the second fault gas circuit, the other end of the second fault gas circuit is connected to the atmosphere, the second fault gas circuit is set to be able to open and close, and the opening degree of the second fault gas circuit can be adjusted.

2. The fault simulation device according to claim 1, characterized in that: The fault simulation mechanism on each gas supply line further includes a second fault component, and the second fault component is used to simulate the accidental opening of the combination valve.

3. The fault simulation device according to claim 2, characterized in that: The second fault component further includes: The third fault gas circuit, one end of the third fault gas circuit is unidirectionally connected to the first fault gas circuit, the direction of the unidirectional connection is from the first fault gas circuit to the third fault gas circuit, the other end of the second fault gas circuit is connected to the atmosphere, and the second fault gas circuit is set to be able to open and close.

4. The fault simulation device according to claim 2, characterized in that: The fault simulation device further includes an extended air path connected between the first fault component and the air spring, and the fault simulation mechanism on each air supply path further includes a third fault component, and the third fault component is used to simulate slow air leakage of the air spring; Wherein, the third fault component includes an air pumping component and a valve component, the air pumping component is arranged at the end of the extended air path, the valve component is arranged on the upstream side of the air pumping component, and the valve component is used to control the opening and closing of the extended air path.

5. The fault simulation device according to claim 4, characterized in that: The fault simulation mechanism on each air supply path further includes a fourth fault component, which is arranged in the extension air path and is used to simulate the bursting of the air spring.

6. The fault simulation device according to claim 5, characterized in that: The fault simulation device also includes an air tank, which is connected to the combination valve via an air storage gas path. The air storage gas path is provided with the fault simulation mechanism, which includes a first fault component, a second fault component, a third fault component and a fourth fault component.

7. The fault simulation device according to any one of claims 1 to 6, characterized in that: The fault simulation device further comprises a flow sensor and a pressure sensor, and the gas circuit where the fault simulation mechanism is located is provided with the flow sensor and the pressure sensor.

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