CN210513996U - Carbon tank test system - Google Patents
Carbon tank test system Download PDFInfo
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- CN210513996U CN210513996U CN201921485675.4U CN201921485675U CN210513996U CN 210513996 U CN210513996 U CN 210513996U CN 201921485675 U CN201921485675 U CN 201921485675U CN 210513996 U CN210513996 U CN 210513996U
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Abstract
The utility model provides a carbon canister test system. The carbon canister test system is used for detecting the adsorption capacity of an activated carbon canister of a vehicle, and comprises the activated carbon canister and an auxiliary carbon canister, wherein a vent of the activated carbon canister is communicated with an adsorption port of the auxiliary carbon canister; a compressed nitrogen tank, a compressed butane tank and a compressed air tank; a pressure regulator group including a first, a second and a third pressure regulators; the mass flowmeter group comprises a first mass flowmeter, a second mass flowmeter and a third mass flowmeter; an air filter; a programmable controller; wherein, the compressed nitrogen tank is connected with the adsorption port of the activated carbon tank through a first pressure regulator and a first mass flow meter, and the compressed butane tank is connected with the adsorption port of the activated carbon tank through a second pressure regulator and a second mass flow meter. The utility model provides a pair of charcoal jar test system can monitor activated carbon jar's desorption ability convenient and fast ground, and the test result is accurate.
Description
Technical Field
The utility model relates to a vehicle pollutant discharges and detects and environmental protection field, in particular to carbon canister test system.
Background
At normal temperature, the fuel tank is often filled with gasoline vapor, and when the temperature and the pressure of the gasoline tank of the gasoline vehicle change, a large amount of gasoline vapor is discharged to the atmosphere through the vent hole. The fuel evaporative emission control system functions to introduce vapors into combustion and prevent evaporation into the atmosphere. An important part of this process is the activated carbon canister. The active carbon in the active carbon tank has an adsorption function, when the automobile runs or is flamed out, gasoline vapor in the fuel tank enters the upper part of the active carbon tank through a pipeline, and fresh air enters the active carbon tank from the lower part of the active carbon tank. After the engine is shut down, gasoline vapor and fresh air are mixed in the tank and stored in the activated carbon tank, and after the engine is started, a valve of a fuel evaporation and purification device arranged between the activated carbon tank and an intake manifold is opened, so that the gasoline vapor in the activated carbon tank is sucked into the intake manifold to participate in combustion. Thereby reducing the leakage of oil gas, and being beneficial to protecting environment and saving energy.
The fuel evaporation control system mainly depends on the working capacity of the activated carbon tank to realize the control of evaporation emission. The working principle of the mode is as follows: when the fuel pressure in the vehicle fuel tank exceeds the opening pressure of a fuel vapor valve and an activated carbon tank adsorption valve in the fuel tank, the fuel vapor valve and the activated carbon tank adsorption valve are opened, fuel vapor enters the activated carbon tank from the related paths, and the fuel vapor is adsorbed and stored in the activated carbon tank due to the strong adsorption of the activated carbon in the activated carbon tank. However, the ability of the activated carbon canister to adsorb fuel vapor is limited and is affected by the material and geometric characteristics of the activated carbon in the activated carbon canister, the flow rate of the fuel vapor, the working temperature, and other factors. Therefore, the activated carbon canister must have a certain capacity of desorbing fuel vapor (also called purge capacity) at the same time, so that the activated carbon canister in a state of adsorbing fuel vapor to saturation can recover the adsorption capacity again.
To confirm the canister purging capability of the vehicle, a canister test system is required to monitor the desorption of the activated canister. The existing carbon canister test system has the following problems:
1. in the desorption process, desorption is carried out simultaneously to active carbon jar and supplementary canister, and when active carbon jar volume is very little (like the canister for motorcycle), the gaseous volume of desorption is also very little, and desorption then supplementary canister can't carry out abundant desorption simultaneously, leads to a plurality of to adsorb, after the desorption circulation, and quality when supplementary canister punctures continuously rises, can't judge normal breakdown opportunity.
2. If the auxiliary carbon tank is in an incomplete desorption completion state, in an adsorption test, the purified mixed gas can desorb the auxiliary carbon tank first, and the auxiliary carbon tank can go through a process of quality reduction and then rising, so that the breakdown time of the activated carbon tank is judged to be influenced.
3. The existing test equipment usually adopts a hose as a gas flow channel, and the mass of the activated carbon tank and the mass of the auxiliary carbon tank can greatly float due to the stress action of the hose on the activated carbon tank and the auxiliary carbon tank, so that the weighing data is influenced.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem of prior art, the utility model provides a charcoal jar test system can monitor activated carbon tank's desorption ability convenient and fast ground, and the test result is accurate.
Specifically, the utility model provides a carbon canister test system for detect the adsorption efficiency of the activated carbon canister of vehicle, carbon canister test system includes:
the air vent of the activated carbon tank is communicated with the adsorption port of the auxiliary carbon tank;
a compressed nitrogen tank, a compressed butane tank and a compressed air tank;
a pressure regulator group including a first, a second and a third pressure regulators;
the mass flowmeter group comprises a first mass flowmeter, a second mass flowmeter and a third mass flowmeter;
an air filter;
a programmable controller;
wherein, the compressed nitrogen jar warp first pressure regulator and the access of first mass flow meter the absorption mouth of activated carbon jar, the compressed butane jar warp second pressure regulator and the access of second mass flow meter the absorption mouth of activated carbon jar, the compressed air jar warp third pressure regulator, air cleaner and the access of third mass flow meter the blow vent of activated carbon jar reaches the blow vent of supplementary carbon jar, programmable controller is used for control pressure regulator group and the work of mass flow meter group are in order to implement the experimental operation of the absorption and the desorption of activated carbon jar and supplementary carbon jar.
According to an embodiment of the present invention, the canister test system further includes a three-way solenoid valve and a first solenoid valve electrically connected to the programmable controller, the three-way solenoid valve is disposed on a connection path between the second pressure regulating valve and the second mass flow meter, and the three-way solenoid valve is communicated with a connection path between the third pressure regulating valve and the third mass flow meter; and the first mass flow meter is communicated with the second mass flow meter and then is connected to the adsorption port of the activated carbon canister through the first electromagnetic valve.
According to the utility model discloses an embodiment, charcoal jar test system still includes pressure sensor and proportional control ware, pressure sensor sets up first solenoid valve with in the connecting channel of activated carbon jar, proportional control ware sets up third mass flow meter with insert in the connecting channel of activated carbon jar and supplementary charcoal jar, pressure sensor and proportional control ware electricity are connected programmable logic controller.
According to an embodiment of the utility model, charcoal jar test system still include with first check valve, second solenoid valve, third solenoid valve, fourth solenoid valve, fifth solenoid valve, sixth solenoid valve and seventh solenoid valve that programmable controller connects, first check valve sets up on the way of the connection of first mass flow meter and first solenoid valve, the second check valve sets up on the way of the connection of second mass flow meter and second solenoid valve, the second solenoid valve sets up on the desorption mouth of activated charcoal jar, the third solenoid valve sets up proportional regulator with on the way of the connection of the blow vent of activated charcoal jar, the fourth solenoid valve sets up proportional regulator with on the way of the connection of the blow vent of supplementary charcoal jar, the fifth solenoid valve sets up the blow vent of activated charcoal jar with on the way of the connection of the absorption mouth of supplementary charcoal jar, The sixth electromagnetic valve is arranged on a desorption opening of the auxiliary carbon tank, and the seventh electromagnetic valve is arranged on an outward passage of a vent hole of the auxiliary carbon tank.
According to an embodiment of the present invention, the mass flow meter group is detachably provided in the canister test system.
According to the utility model discloses an embodiment, carbon canister test system includes panel and coupling hose, the panel is used for supporting, keeps apart or protects each equipment of carbon canister test system, coupling hose is used for the intercommunication each equipment of carbon canister test system, the panel adopts cellular structure in order to carry on coupling hose.
The utility model provides a pair of carbon canister test system can effectively promote carbon canister test effect, holds the breakdown opportunity, and the adsorption efficiency of accurate judgement activated carbon canister.
It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:
fig. 1 is a schematic circuit diagram of a canister test system according to the present invention.
Wherein the figures include the following reference numerals:
canister test System 100 activated carbon canister 101
Compressed butane tank 106 compressed air tank 107
Second Mass flow Meter 112 third Mass flow Meter 113
Third solenoid valve 122 fourth solenoid valve 123
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
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. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.
Fig. 1 is a schematic circuit diagram of a canister test system according to the present invention. As shown, the canister test system 100 is used to test the adsorption capacity of an activated canister 101 of a vehicle. Canister test system 100 generally includes an activated carbon canister 101, an auxiliary canister 102, a compressed nitrogen gas canister 105, a compressed butane canister 106, a compressed air canister 107, a pressure regulator bank, a mass flow meter bank, an air filter 114, and a programmable controller.
Wherein the vent 103 of the canister 101 is in communication with the adsorption port 128 of the auxiliary canister 102. In the adsorption test, activated carbon canister 101 is connected in series with auxiliary canister 102.
A compressed nitrogen tank 105 for supplying compressed nitrogen and a compressed butane tank 106 for supplying compressed butane, the compressed nitrogen and the compressed butane being mixed to simulate pollutants discharged from an automobile, are introduced into the canister 101. The compressed air tank 107 is used to supply compressed air to perform the desorption test of the activated carbon tank 101 and the auxiliary carbon tank 102.
The pressure regulator group comprises a first, a second and a third pressure regulator 108, 109, 110 for regulating the gas flow in the passage.
The mass flow meter group comprises a first, a second and a third mass flow meter 111, 112, 113 for detecting the gas flow of the passage.
The air filter 114 typically comprises a porous filter material that functions to trap dust from the air and to purify the air to ensure air cleanliness. The air filter 114 purifies air having a low dust content and then sends the air into the activated carbon canister 101 and the auxiliary carbon canister 102.
The programmable controller is electrically connected to the above components to coordinate and control the operation of the canister test system 100.
Wherein the compressed nitrogen gas tank 105 is connected to the adsorption port 104 of the activated carbon tank 101 via a first pressure regulator 108 and a first mass flow meter 111. The compressed butane tank 106 is connected to the adsorption port 104 of the activated carbon tank 101 via a second pressure regulator 109 and a second mass flow meter 112. Specifically, nitrogen discharged from the compressed nitrogen tank 105 and butane discharged from the compressed butane tank 106 are mixed in a certain ratio and introduced into the activated carbon tank 101 to perform the adsorption test. The compressed air tank 107 is connected to the vent 103 of the activated carbon tank 101 and the vent 103 of the auxiliary carbon tank 102 via a third pressure regulator 110, an air filter 114, and a third mass flow meter 113. Air supplied from the compressed air tank 107 was injected into the activated carbon tank 101 and the auxiliary carbon tank 102 to perform the desorption test. The programmable controller may control the operation of the pressure regulator bank and the mass flow meter bank to perform adsorption and desorption tests on the activated carbon canister 101 and the auxiliary carbon canister 102.
Preferably, the canister test system 100 further includes a three-way solenoid valve 115 and a first solenoid valve 116 electrically connected to the programmable controller. A three-way solenoid valve 115 is provided on a connection passage between the second pressure regulating valve and the second mass flow meter 112, and the three-way solenoid valve 115 communicates with a connection passage between the third pressure regulating valve and the third mass flow meter 113. The three-way solenoid valve 115 is used to adjust the ratio of the mixed gas input to the canister 101. The first mass flow meter 111 is connected to the adsorption port 104 of the canister 101 through a first solenoid valve 116 after being communicated with the second mass flow meter 112.
Preferably, the canister test system 100 further comprises a pressure sensor 117 and a proportional regulator 118, the pressure sensor 117 and the proportional regulator 118 being electrically connected to the programmable controller. A pressure sensor 117 is provided in a connection passage of the first solenoid valve 116 and the canister 101 for detecting the pressure of the mixed gas in the passage. The programmable controller adjusts the pressure in the channel in time by the pressure regulator based on the pressure conditions in the channel provided by the pressure sensor 117. A proportional regulator 118 is provided in a connection passage of the third mass flow meter 113 to the inlet activated carbon canister 101 and the auxiliary carbon canister 102 for regulating the desorption air pressures of the stabilization activated carbon canister 101 and the auxiliary carbon canister 102 d.
Preferably, the canister test system 100 further includes a first check valve 119, a second check valve 120, a second solenoid valve 121, a third solenoid valve 122, a fourth solenoid valve 123, a fifth solenoid valve 124, a sixth solenoid valve 125, and a seventh solenoid valve 126 connected to the programmable controller. The first check valve 119 is provided in a connection path between the first mass flow meter 111 and the first solenoid valve 116, and the second check valve 120 is provided in a connection path between the second mass flow meter 112 and the second solenoid valve 121. As will be readily appreciated, the first and second one-way valves 120 ensure that gas in the respective passageways flows in a single direction toward the canister 101. The second solenoid valve 121 is provided at the desorption port 127 of the canister 101, the third solenoid valve 122 is provided at the connection passage of the proportional regulator 118 and the vent port 103 of the canister 101, the fourth solenoid valve 123 is provided at the connection passage of the proportional regulator 118 and the vent port 103 of the auxiliary canister 102, the fifth solenoid valve 124 is provided at the connection passage of the vent port 103 of the canister 101 and the adsorption port 128 of the auxiliary canister 102, the sixth solenoid valve 125 is provided at the desorption port 129 of the auxiliary canister 102, and the seventh solenoid valve 126 is provided at the outward passage of the vent port 130 of the auxiliary canister 102. The solenoid valves work in concert to ensure proper operation of the canister test system 100.
Preferably, the mass flow meter cluster is removably disposed in the canister test system 100. By the arrangement, the mass flow meter is convenient to disassemble, so that the calibration work of the mass flow meter is facilitated, and the accuracy of the carbon canister testing system 100 is ensured. Preferably, the mass flow meter group is disposed at the bottom of the canister test system 100 and is of an integrated or quick-connect design to facilitate overall disassembly.
Preferably, the panel and connecting hose are included in the physical structure of the canister test system 100. The panel is used to support, isolate or shield various devices in the canister test system 100, such as the activated canister 101 and the auxiliary canister 102. The connecting hoses are used to communicate with the various devices of the canister test system 100 and establish communication paths between the various devices for the transfer of various types of gases. The panel adopts a honeycomb structure to carry the connecting hose. Specifically, the honeycomb panel makes the overall structure of the carbon canister testing system 100 more stable, and the connection hose can be inserted into the device at a proper angle when the connection hose is mounted, so as to reduce the stress influence of the connection hose on the testing result as much as possible.
Preferably, the programmable controller has an adsorption module and a desorption module. The adsorption module is used to perform the adsorption test of the canister test system 100 and the desorption module is used to perform the desorption test of the canister test system 100.
Preferably, the canister test system 100 further includes a pressure sensor disposed in the activated canister 101 and electrically connected to the programmable controller. The pressure sensor is used for measuring the pressure condition of the activated carbon canister 101 in the test process, and is convenient for researching the influence of the internal pressure of the activated carbon canister 101 on the adsorption capacity of the activated carbon.
Preferably, the canister test system 100 further comprises a temperature and humidity sensor disposed in the activated canister 101 and electrically connected to the programmable controller. The temperature and humidity sensor is used for measuring the internal temperature and humidity of the activated carbon canister 101 in the test process, so that the influence of the internal temperature and humidity of the activated carbon canister 101 on the adsorption capacity of the activated carbon can be conveniently researched.
The above-described canister test system 100 is described in detail below with reference to a canister test method. The canister test method includes adsorption tests and desorption tests performed alternately. The adsorption test is a test in which nitrogen gas and butane gas are ejected from the compressed nitrogen gas tank 105 and the compressed butane tank 106 to form a mixed gas, and the mixed gas flows in from the adsorption port 104 of the activated carbon tank 101, enters the adsorption port 128 of the auxiliary carbon tank 102 through the vent hole 103 of the activated carbon tank 101, and flows out through the vent hole 130 of the auxiliary carbon tank 102. During the adsorption test, the mass of the auxiliary canister 102 is measured in real time, and when the mass of the auxiliary canister 102 increases by 2g, it is determined that the activated canister 101 is punctured, starting from the timing at which the auxiliary canister 102 starts to increase in mass.
Specifically, the nitrogen and the butane form a mixed gas and then enter the canister 101, and the activated carbon in the canister 101 adsorbs the mixed gas, so that the mass of the canister 101 continuously increases. The purified mixture gas is discharged from the vent 103 of the activated carbon canister 101 into the adsorption port 128 of the auxiliary carbon canister 102 connected in series. Initially, the activated carbon has a strong adsorption capacity and the mass of the auxiliary canister 102 does not change. When the activated carbon in the activated carbon canister 101 is nearly saturated, the adsorption capacity of the activated carbon is reduced, the quality of the activated carbon canister 101 slowly rises until the quality does not rise obviously, the mixed gas is not completely adsorbed by the activated carbon canister 101, the mixed gas is discharged from the vent 103 of the activated carbon canister 101 and enters the adsorption port 128 of the auxiliary carbon canister 102, the activated carbon in the auxiliary carbon canister 102 adsorbs the mixed gas, and the quality of the auxiliary carbon canister 102 continuously rises. During the adsorption test, the mass of the auxiliary canister 102 is measured in real time, and when the mass of the auxiliary canister 102 increases by 2g, it is determined that the activated canister 101 is punctured, starting from the timing at which the auxiliary canister 102 starts to increase in mass. If the auxiliary canister 102 is not completely desorbed when the adsorption test is started, the mixed gas purified by the activated canister 101 will desorb the auxiliary canister 102 in an initial period, the mass of the auxiliary canister 102 will be reduced and then raised slowly, and if the mass of the auxiliary canister 102 is increased by 2g, the breakdown time will be biased. Therefore, in the adsorption test provided by the present invention, the breakdown timing of the activated carbon canister 101 is determined using the timing at which the relative mass of the auxiliary carbon canister 102 starts to increase as the starting point.
The desorption test in the canister test method includes desorption operations for the activated canister 101 and the auxiliary canister 102. Wherein the desorption operation on the activated carbon canister 101 comprises the steps of enabling the gas in the compressed air canister 107 to flow into the vent 103 of the activated carbon canister 101 and then flow out through the desorption port 127 of the activated carbon canister 101; the desorption operation for the auxiliary canister 102 includes flowing the gas in the compressed air tank 107 into the vent 130 of the auxiliary canister 102 and out through the desorption port 129 of the auxiliary canister 102. The desorption operation for the activated carbon canister 101 and the desorption operation for the auxiliary carbon canister 102 are simultaneously performed or separately performed. In the desorption test, if the volume of the activated carbon canister 101 is very small (such as a motorcycle canister), the amount of the desorbed gas is also very small, and if the desorbed gases are simultaneously desorbed, the activated carbon canister 101 quickly reaches a sufficient desorption state, and the auxiliary canister 102 is far from a sufficient desorption state, so that the normal breakdown time cannot be determined in the subsequent adsorption test. It is therefore necessary to perform the desorption operation separately for the activated carbon canister 101 and the auxiliary carbon canister 102 to achieve sufficient desorption of the two.
After the canister test system 100 is left to stand for a set period of time t1 after the canister 101 has been punctured during the adsorption test, the relative weight w1 of the canister 101 is measured. Upon completion of the desorption test, the canister test system 100 is allowed to stand for a set period of time t2, and the relative weight w2 of the activated canister 101 is measured. The time period t1 can be selected within a time range of 1-5 m (minutes), and the time period t2 can be selected within a time range of 1-5 m (minutes). The proper rest periods t1, t2 are added to the canister test method to substantially eliminate the stress effects of the connecting hose on the activated canister 101, auxiliary canister 102 and weighing equipment. The adsorption test and the desorption test were cyclically performed several times to evaluate the adsorption capacity of the canister 101 based on the relative weights w1, w2 of the metered canister 101. In one embodiment, the initial operating capacity of the carbon canister 101 may be determined based on an average of the differences between the measured relative weights w1, w2 for the two cycles.
The gas flow rate in the desorption test was varied to simulate the actual working conditions.
The desorption test and the adsorption test of the canister test method will be described in detail below with reference to the accompanying drawings. A first on-off control valve 131 is provided between the compressed nitrogen gas tank 105 and the first pressure regulator 108, a second on-off control valve 132 is provided between the compressed butane tank 102 and the second pressure regulator 109, and a third on-off control valve 133 is provided between the compressed air tank 103 and the third pressure regulator 110. The respective on-off control valves 131, 132, 133 are used to control the gas discharge of the respective passages.
Adsorption test: the first on-off control valve 131 and the second on-off control valve 132 are opened, the three-way solenoid valve 115 is opened, and the first solenoid valve 116 is opened. The second solenoid valve 121 is closed, i.e., the desorption port 127 of the canister 101 is closed. The third solenoid valve 122 is closed and the fourth solenoid valve 123 is closed, preventing air from entering the charcoal canister 101 and the auxiliary canister 102. The fifth solenoid valve 124 is opened and the vent port 103 of the tandem canister 101 and the adsorption port 128 of the auxiliary canister 102 are connected in series. The sixth solenoid valve 125 is closed, i.e., the desorption port of the auxiliary canister 102 is closed. The seventh solenoid valve 126 is opened to discharge the adsorbed gas.
During the adsorption test, butane and nitrogen gas form a mixed gas which enters from the adsorption port 104 of the canister 101, is discharged from the vent port 103 of the canister 101, enters through the adsorption port 128 of the auxiliary canister 102, and is discharged from the vent port 130 of the auxiliary canister 102. For example, a mixed gas of 50% butane and 50% nitrogen is introduced from the adsorption port 104 of the canister 101 at an adsorption flow rate of 40g/h of butane. The programmable controller can control the pressure regulator group and the mass flowmeter group to work so as to flexibly adjust the flow rate of mixed lifting. The programmable controller measures the mass of the activated carbon canister 101 and the auxiliary carbon canister 102 through a weighing device, determines the moment when the activated carbon canister 101 is punctured, and records the relative weight w1 of the activated carbon canister 101 at the moment after standing for 2 minutes.
And (3) desorption test: the third on/off control valve 133 is opened, the three-way solenoid valve 115 is closed, the first solenoid valve 116 is closed, and the passage of the mixed gas is closed. The second solenoid valve 121 is opened, that is, the desorption port 127 of the canister 101 is opened. The third solenoid valve 122 is opened, the fourth solenoid valve 123 is opened, and the fifth solenoid valve 124 is closed, disconnecting the series configuration of the activated carbon canister 101 and the auxiliary carbon canister 102, and allowing air to be introduced into the activated carbon canister 101 and the auxiliary carbon canister 102, respectively. The sixth solenoid valve 125 opens, i.e., opens the desorption port 129 of the auxiliary canister 102. The seventh solenoid valve 126 is closed.
The air discharged from the compressed air tank 107 is divided into two paths, wherein one path enters from the air vent 103 of the activated carbon tank 101 and is discharged through the desorption port 127 of the activated carbon tank 101; the other path enters from the vent port 130 of the auxiliary canister 102 and exits through the desorption port 129 of the auxiliary canister 102. For example, air enters the canister 101 through the vent 103 at a desorption flow rate of 25L/min butane, and when the total desorption amount reaches a set value, desorption is stopped. The relative weight w2 of the canister 101 at this instant of time was recorded after 2 minutes of standing.
The adsorption test and the desorption test are repeated, preferably over 6 cycles, and the difference between w1 and w2 obtained in 2 cycles is averaged as the result of the initial operating capacity of the activated carbon canister 101.
The utility model provides a charcoal jar test system mainly used simulation active carbon jar is at the operating condition on the vehicle, carries out real-time measurement to the active carbon jar condition. The carbon canister test system can perform carbon canister bench test in a butane and nitrogen mixed gas adsorption carbon canister manner, and meets (but is not limited to) requirements of initial working capacity, and initial working capacity of activated carbon canister in a gasoline vehicle fuel oil evaporation pollutant control system (device) of HJ/T2007-2007 technical requirements of environmental protection products in evaporation pollutant emission tests and oil filling process pollutant emission tests of regulations such as GB18352.5-2013 light vehicle pollutant emission limit and measurement method (five stages in China), GB18352.6-2016 pollutant emission limit and measurement method (six stages in China), DB11/946-2013 light vehicle (ignition type) pollutant emission limit and measurement method (Beijing V stage), EPA40 CFR part 86 and ECE _ R83 (all latest revisions and accessories thereof), The test requirements of the working capacity are finished, and the test of the activated carbon tank corresponding to the corresponding vehicle covered by corresponding regulations is smoothly finished under the test requirements of the corresponding regulations.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (6)
1. A canister test system for testing the adsorption capacity of an activated canister of a vehicle, comprising,
the air vent of the activated carbon tank is communicated with the adsorption port of the auxiliary carbon tank;
a compressed nitrogen tank, a compressed butane tank and a compressed air tank;
a pressure regulator group including a first, a second and a third pressure regulators;
the mass flowmeter group comprises a first mass flowmeter, a second mass flowmeter and a third mass flowmeter;
an air filter;
a programmable controller;
wherein, the compressed nitrogen jar warp first pressure regulator and the access of first mass flow meter the absorption mouth of activated carbon jar, the compressed butane jar warp second pressure regulator and the access of second mass flow meter the absorption mouth of activated carbon jar, the compressed air jar warp third pressure regulator, air cleaner and the access of third mass flow meter the blow vent of activated carbon jar reaches the blow vent of supplementary carbon jar, programmable controller is used for control pressure regulator group and the work of mass flow meter group are in order to implement the experimental operation of the absorption and the desorption of activated carbon jar and supplementary carbon jar.
2. A canister test system according to claim 1 further comprising a three-way solenoid valve and a first solenoid valve electrically connected to said programmable controller, said three-way solenoid valve being provided on a connecting passage between said second pressure regulating valve and a second mass flow meter, said three-way solenoid valve being communicated with a connecting passage between said third pressure regulating valve and a third mass flow meter; and the first mass flow meter is communicated with the second mass flow meter and then is connected to the adsorption port of the activated carbon canister through the first electromagnetic valve.
3. A canister test system as in claim 2 further comprising a pressure sensor disposed in a connection path of the first solenoid valve to the activated carbon canister and a proportional regulator disposed in a connection path of the third mass flow meter to the access activated carbon canister and auxiliary carbon canister, the pressure sensor and proportional regulator being electrically connected to the programmable controller.
4. A canister test system according to claim 3, further comprising a first check valve, a second solenoid valve, a third solenoid valve, a fourth solenoid valve, a fifth solenoid valve, a sixth solenoid valve, and a seventh solenoid valve connected to the programmable controller, wherein the first check valve is provided on a connection path of the first mass flow meter and the first solenoid valve, the second check valve is provided on a connection path of the second mass flow meter and the second solenoid valve, the second solenoid valve is provided on a desorption port of the activated carbon canister, the third solenoid valve is provided on a connection path of the proportional regulator and a vent port of the activated carbon canister, the fourth solenoid valve is provided on a connection path of the proportional regulator and a vent port of the auxiliary carbon canister, and the fifth solenoid valve is provided on a connection path of the vent port of the activated carbon canister and an adsorption port of the auxiliary carbon canister, The sixth electromagnetic valve is arranged on a desorption opening of the auxiliary carbon tank, and the seventh electromagnetic valve is arranged on an outward passage of a vent hole of the auxiliary carbon tank.
5. A canister testing system according to claim 1 wherein said mass flow meter array is removably disposed in said canister testing system.
6. A canister testing system according to claim 1, comprising a panel for supporting, isolating or shielding the respective devices of the canister testing system and a connection hose for communicating the respective devices of the canister testing system, the panel being of a honeycomb structure for carrying the connection hose.
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| CN201921485675.4U CN210513996U (en) | 2019-09-05 | 2019-09-05 | Carbon tank test system |
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| CN201921485675.4U CN210513996U (en) | 2019-09-05 | 2019-09-05 | Carbon tank test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441186A (en) * | 2019-09-05 | 2019-11-12 | 上海机动车检测认证技术研究中心有限公司 | A kind of canister pilot system and its test method |
| CN117538202A (en) * | 2024-01-10 | 2024-02-09 | 中汽研汽车检验中心（天津）有限公司 | Method and device for distinguishing contribution amounts of different parts to oiling emission |
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2019
- 2019-09-05 CN CN201921485675.4U patent/CN210513996U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441186A (en) * | 2019-09-05 | 2019-11-12 | 上海机动车检测认证技术研究中心有限公司 | A kind of canister pilot system and its test method |
| CN117538202A (en) * | 2024-01-10 | 2024-02-09 | 中汽研汽车检验中心（天津）有限公司 | Method and device for distinguishing contribution amounts of different parts to oiling emission |
| CN117538202B (en) * | 2024-01-10 | 2024-04-09 | 中汽研汽车检验中心（天津）有限公司 | Method and device for distinguishing contribution amounts of different parts to oiling emission |
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