System and method for testing multiple dynamic motion functions of fuel system

Abstract

The invention discloses a system and method for testing multiple dynamic motion functions of a fuel system, and relates to the technical field of fuel system tests.The system comprises a six-degree-of-freedom motion platform and a positioning mechanism used for positioning a fuel tank on the six-degree-of-freedom motion platform, an outlet of the fuel tank is communicated with a first liquid collecting container, and an outlet of the fuel tank is communicated with a second liquid collecting container; the first liquid collecting container is communicated with the external environment through an atmosphere pipeline, a pressure sensor is arranged in the fuel tank, the fuel tank is communicated with a gas supply pipeline used for supplying gas, and the six-degree-of-freedom motion platform is electrically connected with the control system. According to the invention, the fuel tank of the fuel system is positioned on the six-degree-of-freedom motion platform, so that the characteristic of multi-degree-of-freedom motion of the six-degree-of-freedom motion platform can be utilized to realize rapid acceleration and rapid deceleration simulation, overturning start-stop and turning simulation and specific road spectrum simulation of the fuel system, switching among multiple systems is not needed, and the simulation efficiency is improved. And the testing efficiency of the fuel system is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel system testing, in particular to a fuel system multi-dynamic motion function testing system and testing method. BACKGROUND

[0002] The fuel system is an important component in the automobile, and in the normal use process, there will be a situation of leaking oil at the outlet of the fuel tank, and the internal pressure will also change, so when it is shipped, it needs to be tested to obtain the performance of the fuel system and detect its qualification.

[0003] The testing system for the fuel system known to the applicant at present mainly includes two types: The first type is a testing system for simulating the state of sudden acceleration and sudden deceleration, which sets a platform on the slide rail, places the fuel system on the platform, and drives the platform to reciprocate on the slide rail by using a linear driving mechanism to complete the simulation of sudden acceleration and sudden deceleration.

[0004] The second type is a testing system for simulating the state of overturning and tilting, which installs a platform on an axis horizontal rotary driving device, places the fuel system on the platform, and drives the platform to overturn by using the rotary driving device to complete the simulation of overturning and tilting.

[0005] However, the above two testing systems are of split structure, and when testing the fuel system, not only the sudden acceleration and sudden deceleration test is needed, but also the overturning and tilting test is needed, so when actually testing, the fuel system needs to be switched between the two testing systems, which reduces the testing efficiency of the fuel system.

[0006] Therefore, people urgently need a fuel system multi-dynamic motion function testing system with high testing efficiency. SUMMARY

[0007] The present application aims to provide a fuel system multi-dynamic motion function testing system and testing method to solve the problems existing in the prior art, which can realize the testing of multiple dynamic motion functions of the fuel system by using a six-degree-of-freedom motion platform, and effectively improve the testing efficiency.

[0008] In order to achieve the above object, the present application provides the following scheme: the present application provides a kind of multiple dynamic motion function test system of fuel system, including six-degree-of-freedom motion platform and the positioning mechanism for positioning fuel tank on the six-degree-of-freedom motion platform, the outlet of the fuel tank is communicated with first liquid container, the first liquid container is communicated with external environment by atmosphere pipeline, pressure sensor is arranged in the fuel tank, the fuel tank is communicated with gas supply pipeline for supplying gas, the six-degree-of-freedom motion platform is electrically connected with control system;The adsorption pipe opening of the fuel tank is communicated with carbon canister by connecting pipeline, the lowest point of the connecting pipeline is lower than the horizontal height of the adsorption pipe opening, and the lowest point of the connecting pipeline is communicated with second liquid container;The gas supply pipeline is located on the side of the fuel tank away from the outlet communicated with the first liquid container.

[0009] Preferably, the positioning mechanism includes clamping block and limiting frame, at least one clamping block is arranged around the fuel tank, the clamping block is arranged in close contact with the peripheral wall of the fuel tank, and the limiting frame is inverted U-shaped, and the bottom arm of the limiting frame is arranged in close contact with the top wall of the fuel tank.

[0010] Preferably, the clamping block and the limiting frame are detachably arranged on the six-degree-of-freedom motion platform.

[0011] Preferably, a plurality of holes are formed in the top support plate of the six-degree-of-freedom motion platform.

[0012] Preferably, the clamping block is bolted to the six-degree-of-freedom motion platform through the hole.

[0013] Preferably, a plurality of holes are arranged around the fuel tank.

[0014] The present application also provides a test method using the above-mentioned multiple dynamic motion function test system of fuel system, including dynamic aeration test, and the test steps of dynamic aeration test are as follows: Inject gasoline into the fuel tank, supply gas into the fuel tank through the gas supply pipeline, block all openings except the gas injection port and the adsorption pipe opening, and start the test; During the test, control the fuel tank to tilt in four directions, front, back, left and right, after each direction is tilted, control the fuel tank to return to the horizontal state, and then perform the next tilt test; After the test is completed, the amount of leaked liquid in the first liquid container and the pressure data in the fuel tank are obtained.

[0015] Preferably, the test method further includes sudden acceleration and sudden deceleration test, and the test steps of sudden acceleration and sudden deceleration test are as follows: Injecting gasoline into the fuel tank, supplying gas into the fuel tank through the gas supply pipeline, blocking all openings except the gas injection port and the adsorption tube port, and opening the test; During the test, the fuel tank is controlled to move in two directions of forward and backward along the horizontal direction, and after the movement control in each direction is completed, it is stopped for a certain time; After the test is completed, the amount of leaked liquid in the first liquid collecting container and the pressure data in the fuel tank are obtained.

[0016] The application also provides a test method for the fuel system dynamic motion function test system, including specific road spectrum test, and the test steps of the specific road spectrum test are as follows: The fuel system is installed on the six-degree-of-freedom motion platform in an actual vehicle-mounted state, gasoline is added to the fuel tank of the fuel system, the carbon tank is desorbed, and gas is supplied into the fuel tank through the gas supply pipeline; The six-degree-of-freedom motion platform is controlled to make the fuel system move according to the road spectrum, and the pressure curve in the fuel tank is obtained; After the test is completed, the amount of leaked liquid in the first liquid collecting container and the second liquid collecting container is obtained.

[0017] The application has the following technical effects compared with the prior art: The fuel tank of the fuel system is positioned on the six-degree-of-freedom motion platform, so that the characteristics of multi-degree-of-freedom motion of the six-degree-of-freedom motion platform are utilized to realize simulation of sudden acceleration and sudden deceleration, turnover start and stop, turning and specific road spectrum, without switching between multiple systems, and the test efficiency of the fuel system is improved. DETAILED DESCRIPTION

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 It is a structural schematic view of the six-degree-of-freedom motion platform and the positioning mechanism in the embodiment of the application. Figure 2 It is a front view of the six-degree-of-freedom motion platform and the positioning mechanism in the embodiment of the application. Figure 3 It is a top view of the six-degree-of-freedom motion platform and the positioning mechanism in the embodiment of the application. Figure 4 It is a left view of the six-degree-of-freedom motion platform and the positioning mechanism in the embodiment of the application. Figure 5It is a structural schematic view of the fuel system multiple dynamic motion function test system in the embodiment of the present application. Figure 6 It is a test schematic view of the sudden acceleration and sudden deceleration test in the embodiment of the present application. Figure 7 It is a test schematic view of the dynamic air permeability test in the embodiment of the present application. Among them, 1, six degrees of freedom motion platform; 2, fuel tank; 3, first liquid collecting container; 4, atmospheric pipeline; 5, pressure sensor; 6, gas supply pipeline; 7, control console; 8, clamping block; 9, limiting frame; 10, hole. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] The purpose of the present application is to provide a fuel system multiple dynamic motion function test system and test method to solve the problems existing in the prior art, and to realize the test of multiple dynamic motion functions of the fuel system by using a six degrees of freedom motion platform, thereby effectively improving the test efficiency.

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0023] Please refer to the drawings as shown in Figures 1-7 A fuel system multiple dynamic motion function test system is provided, which comprises a six degrees of freedom motion platform 1 and a positioning mechanism for positioning a fuel tank 2 on the six degrees of freedom motion platform 1. The positioning mechanism can prevent the fuel tank 2 of the fuel system from sliding off the six degrees of freedom motion platform 1 during the test. Since there is a problem of oil leakage at the outlet of the fuel tank 2, the outlet of the fuel tank 2 is connected to a first liquid collecting container 3 in the present application. The first liquid collecting container 3 is connected to the outside environment through an atmospheric pipeline 4, so that the pressure in the first liquid collecting container 3 is the same as the outside environment. This can simulate the environmental pressure at the outlet of the real fuel tank 2 and also can collect the leaked oil from the outlet. A pressure sensor 5 is arranged in the fuel tank 2 to monitor the pressure data in the fuel tank 2. The fuel tank 2 is connected to a gas supply pipeline 6 for supplying gas. The six degrees of freedom motion platform 1 is electrically connected to a control system, which is integrated in a control console 7 for easy control by the staff.

[0024] The position where the fuel tank 2 communicates with the gas supply pipeline 6 can be higher or lower than the liquid level inside the fuel tank 2, and the gas supply pipeline 6 can be supplied with gas by using a one-way air pump, so that the oil liquid cannot flow out from the gas supply pipeline 6.

[0025] When the position where the fuel tank 2 communicates with the gas supply pipeline 6 is lower than the liquid level inside the fuel tank 2, the gas supply pipeline 6 is located on the side of the fuel tank 2 away from the outlet communicating with the first liquid collecting container 3, so as to avoid the influence of gas stimulation on the normal leakage of oil liquid.

[0026] The gas supply pipeline 6 is installed on the fuel tank 2 through a detachable structure such as a flange, and after the test is completed, the gas supply pipeline 6 can be removed, and the gas injection inlet of the fuel tank 2 communicating with the gas supply pipeline 6 can be sealed.

[0027] The application also provides a test method of the above-mentioned fuel system dynamic motion function test system, mainly including dynamic aeration test and sudden acceleration and sudden deceleration test.

[0028] The dynamic aeration test can be considered as performing roll start-stop and turning test, and the test steps of the dynamic aeration test are as follows: A rated volume of gasoline is injected into the fuel tank 2, and gas is supplied into the fuel tank 2 through the gas supply pipeline 6, the gas supplied can be air, nitrogen or the like, the flow rate of the supplied gas can be 3L / min, all openings of the fuel tank 2 except the gas injection inlet and the adsorption pipe opening are blocked, and the test is started; During the test, the six-degree-of-freedom motion platform 1 is used to control the fuel tank 2 to tilt in four directions of forward, backward, left and right, after the tilt control in each direction is completed, the fuel tank 2 is controlled to return to the horizontal state, and the next tilt test is performed, and the specific control process is as follows: a) tilted to 35º forward within 1 second, kept for 2 seconds, returned to the horizontal within 1 second, and kept for 2 seconds; b) tilted to 35º backward within 1 second, kept for 2 seconds, returned to the horizontal within 1 second, and kept for 2 seconds; c) tilted to 10º left within 1 second, kept for 2 seconds, returned to the horizontal within 1 second, and kept for 2 seconds; d) tilted to 10º right within 1 second, kept for 2 seconds, returned to the horizontal within 1 second, and kept for 2 seconds; The above-mentioned control process can be cycled for multiple times, and the number of cycles can be 75 times, and the multiple cycles can improve the test accuracy.

[0029] After the test is completed, the leakage liquid volume in the first liquid collecting container 3 and the pressure data in the fuel tank 2 are obtained, so as to judge whether the fuel tank 2 is qualified or not, and the basis for qualification is that the dynamic leakage volume is not more than 10 mL, and the pressure in the fuel tank is not greater than 10 kPa.

[0030] The test steps of the sudden acceleration and sudden deceleration test are as follows: A rated volume of gasoline is injected into the fuel tank 2, and a gas is supplied into the fuel tank 2 through the gas supply pipeline 6, the gas is air, nitrogen or the like, the flow rate of the supplied gas can be 3 L / min, the gas injection port and the adsorption tube port of the fuel tank 2 are blocked, and the test is started; During the test, the six-degree-of-freedom motion platform 1 is used to control the fuel tank 2 to move in two directions in the horizontal direction, and after the movement control in each direction is completed, it is stopped for a certain period of time, and the specific control process is as follows: a) 0.5 seconds to complete the forward movement of 230 mm, and then stop for 5.5 seconds; b) 0.5 seconds to complete the backward movement of 230 mm, and then stop for 5.5 seconds; The above control process can be repeated for a plurality of times, and the number of cycles can be 75 times, and the test accuracy can be improved through multiple cycles.

[0031] After the test is completed, the amount of leaked liquid in the first liquid collector 3 and the pressure data in the fuel tank 2 are obtained to determine whether the fuel tank 2 is qualified, and the basis for qualification is that the dynamic leakage amount is not more than 10 mL, and the pressure in the fuel tank is not more than 10 kPa.

[0032] In an embodiment, the positioning mechanism includes horizontal extenders and vertical extenders, the horizontal extenders are arranged on the six-degree-of-freedom motion platform 1, the vertical extenders are arranged on the six-degree-of-freedom motion platform 1 through the vertical columns, at least one horizontal extender is arranged around the fuel tank 2, the horizontal extender is abutted to the peripheral wall of the fuel tank 2 through the extension characteristic, and the fuel tank 2 is positioned from all around, the vertical extender is located above the fuel tank 2, the vertical extender is abutted to the top wall of the fuel tank 2 through the extension characteristic, and the fuel tank 2 is positioned from top to bottom in cooperation with the six-degree-of-freedom motion platform 1.

[0033] In an embodiment, the positioning mechanism includes clamping blocks 8 and limiting frames 9, the clamping blocks 8 and the limiting frames 9 are arranged on the six-degree-of-freedom motion platform 1, at least one clamping block 8 is arranged around the fuel tank 2, the clamping block 8 is arranged in close contact with the peripheral wall of the fuel tank 2, and the fuel tank 2 is positioned from all around, the limiting frame 9 is in the shape of an inverted U, the bottom arm of the limiting frame 9 is arranged in close contact with the top wall of the fuel tank 2, and the fuel tank 2 is positioned from top to bottom in cooperation with the six-degree-of-freedom motion platform 1.

[0034] The clamping blocks 8 and the limiting frames 9 can be detachably arranged on the six-degree-of-freedom motion platform 1 to adapt to fuel tanks 2 of different sizes, and the specific detachable connection mode can be buckle connection or bolt connection.

[0035] A plurality of holes 10 are formed in the top support plate of the six-degree-of-freedom motion platform 1, which can reduce the weight and energy consumption.

[0036] On the basis of setting the holes 10, the clamping block 8 can be bolted with the six-degree-of-freedom motion platform 1 through the holes 10, realizing the detachable connection of the two; meanwhile, the two supporting arms of the limiting frame 9 can also be provided with a connecting plate parallel to the top supporting plate of the six-degree-of-freedom motion platform 1, and the connecting plate is bolted with the six-degree-of-freedom motion platform 1 through the holes 10, realizing the detachable connection of the two.

[0037] The plurality of holes 10 are arranged corresponding to the periphery of the fuel tank 2, and the region corresponding to the middle of the fuel tank 2 is not provided with holes 10, thereby providing a good supporting effect for the fuel tank 2.

[0038] In an embodiment, since there is also part of oil liquid in the pipeline in which the adsorption pipe port of the fuel tank 2 communicates with the carbon canister, the adsorption pipe port of the fuel tank 2 is designed to communicate with the carbon canister through a connecting pipeline, the lowest point of the connecting pipeline is lower than the horizontal height of the adsorption pipe port, for example, the connecting pipeline is in a U shape or a V shape, etc., the lowest point of the connecting pipeline communicates with the second liquid collecting container, and the second liquid collecting container can collect the oil liquid in the connecting pipeline.

[0039] On the basis of setting the second liquid collecting container, the six-degree-of-freedom motion platform 1 is used to realize the specific road spectrum test, and the test steps of the specific road spectrum test are as follows: The fuel system is installed on the six-degree-of-freedom motion platform 1 in an actual vehicle-mounted state, the fuel tank 2 of the fuel system is filled with Guo Li standard gasoline to one or more times of jump gun (fueling flow rate: 37 L / min ± 1 L / min; oil product RVP: 45 kPa ± 2 kPa; oil temperature: 25℃ ± 2℃), then dry air with a temperature of (25±5)℃ is used to desorb the carbon canister (desorption flow is (25±1) L / min; desorption gas amount is 300 effective volumes of the carbon canister), after the desorption is completed, gas is supplied into the fuel tank 2 through the gas supply pipeline 6, the gas is air, nitrogen, etc., and the flow rate of the supplied gas can be 5 L / min; The six-degree-of-freedom motion platform 1 is controlled to make the fuel system move according to the road spectrum, and the pressure sensor 5 is used to obtain the pressure curve inside the fuel tank 2; After the test is completed, the leakage liquid amount in the first liquid collecting container 3 and the second liquid collecting container is obtained, and whether the fuel tank 2 is qualified is judged according to the total leakage liquid amount, and the basis for qualification is that the dynamic leakage amount is not more than 10 mL, and the internal pressure of the fuel tank in the movement process is not greater than 10 kPa.

[0040] The adaptive changes according to actual needs are within the protection scope of the present application.

[0041] It is to be understood that the application is not limited to the details of the above-exemplified embodiments and that the present application can be carried out in other ways without deviating from the sprit or essential characteristics of the application. Therefore, the embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the scope of the claims.

[0042] The above examples are illustrative of the present application and are not intended to limit the scope of the application. Rather, the scope of the present application is to be given by the appended claims together with their full scope of equivalents.

Claims

1. A fuel system multiple dynamic motion function test system, characterized by: It includes a six-degree-of-freedom motion platform and a positioning mechanism for positioning the fuel tank on the six-degree-of-freedom motion platform, the outlet of the fuel tank is connected to a first liquid collecting container, the first liquid collecting container is connected to the external environment through an atmospheric pipeline, a pressure sensor is provided in the fuel tank, the fuel tank is connected to an air supply pipeline for supplying gas, and the six-degree-of-freedom motion platform is electrically connected to a control system; the adsorption pipe mouth of the fuel tank is connected to a carbon canister through a connecting pipe, the lowest point level of the connecting pipe is lower than the level of the adsorption pipe mouth, and the lowest point of the connecting pipe is connected to a second liquid collecting container; the air supply pipeline is located on the side of the fuel tank away from the outlet connected to the first liquid collecting container.

2. The fuel system multiple dynamic motion function test system according to claim 1, characterized in that: The positioning mechanism includes a clamping block and a limiting truss. At least one clamping block is provided on each of the four sides of the fuel tank. The clamping block is fitted against the peripheral wall of the fuel tank. The limiting truss is in an inverted U shape, and the bottom arm of the limiting truss is fitted against the top wall of the fuel tank.

3. The fuel system multiple dynamic motion function test system according to claim 2, characterized in that: The clamping block and the limiting truss can be detachably arranged on the six-degree-of-freedom motion platform.

4. The fuel system multiple dynamic motion function test system according to claim 2, characterized in that: A plurality of holes are formed on the top support plate of the six-degree-of-freedom motion platform.

5. The fuel system multiple dynamic motion function test system according to claim 4, characterized in that: The clamping block is bolted to the six-degree-of-freedom motion platform through the hole.

6. The fuel system multiple dynamic motion function test system according to claim 4, characterized in that: The plurality of holes are arranged corresponding to the four sides of the fuel tank.

7. A testing method, characterized in that: The fuel system multiple dynamic motion function test system according to any one of claims 1 to 6 includes a dynamic air permeability test, and the test steps of the dynamic air permeability test are as follows: Fill the fuel tank with gasoline, supply gas into the fuel tank through the gas supply line, block all openings except the gas injection port and the adsorption pipe port, and start the test; During the test, the fuel tank is controlled to tilt in four directions: forward, backward, left and right. After each tilting operation is completed, the fuel tank is controlled to return to the horizontal state before the next tilt test is carried out; After the test is completed, the amount of leaked liquid in the first liquid collecting container and the pressure data in the fuel tank are obtained.

8. The testing method according to claim 7, characterized in that: The test method also includes rapid acceleration and rapid deceleration tests. The test steps for rapid acceleration and rapid deceleration tests are as follows: Fill the fuel tank with gasoline, supply gas into the fuel tank through the gas supply line, block all openings except the gas injection port and the adsorption pipe port, and start the test; During the test, the fuel tank is controlled to move horizontally in two directions, forward and backward. After the movement control in each direction is completed, it stops for a certain period of time. After the test is completed, the amount of leaked liquid in the first liquid collecting container and the pressure data in the fuel tank are obtained.

9. A testing method, characterized in that: The fuel system multiple dynamic motion function test system as claimed in claim 1 includes a specific road spectrum test, and the test steps of the specific road spectrum test are as follows: The fuel system is installed on a six-degree-of-freedom motion platform in its actual vehicle-mounted state, gasoline is added to the fuel tank of the fuel system, the carbon canister is desorbed, and gas is supplied to the fuel tank through the gas supply pipeline; Control the six-degree-of-freedom motion platform to make the fuel system move according to the road spectrum and obtain the pressure curve inside the fuel tank; After the test is completed, the amount of leaked liquid in the first liquid collecting container and the second liquid collecting container is obtained.

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