CN111442886A - Device and method for detecting comprehensive performance of national six-carbon tank of automobile - Google Patents
Device and method for detecting comprehensive performance of national six-carbon tank of automobile Download PDFInfo
- Publication number
- CN111442886A CN111442886A CN202010410752.0A CN202010410752A CN111442886A CN 111442886 A CN111442886 A CN 111442886A CN 202010410752 A CN202010410752 A CN 202010410752A CN 111442886 A CN111442886 A CN 111442886A
- Authority
- CN
- China
- Prior art keywords
- detection
- carbon tank
- electromagnetic valve
- tank
- pressure sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3263—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a differential pressure detector
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The device for detecting the comprehensive performance of the national six-carbon tank of the automobile comprises a detection gas path and a control unit, wherein the detection gas path is arranged on a detection platform and comprises a gas source, a first pressure regulating valve, a flow control valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a balance gas tank, a first differential pressure sensor, a second differential pressure sensor, a detection interface A, a detection interface B and a detection end C; the detection gas circuit is used for conveying a detection gas source to the carbon tank and monitoring the change of the gas pressure of the detection gas source, and the control unit is used for controlling the on-off of the detection gas circuit and processing the gas pressure change value fed back by the control unit, so that the comprehensive performance of the carbon tank to be detected is obtained. The detection device testing method comprises the steps of preparing for detection; testing whether the carbon tank pressure sensor is good or not; detecting the air tightness of the carbon tank; detecting the ventilation resistance of the carbon tank: and recording and storing the data. The detection device can realize automatic detection of the comprehensive performance of the carbon tank, and the detection method is scientific and has high detection efficiency; the detection result is accurate, stable and visual, and can be stored for analysis.
Description
Technical Field
The invention relates to a detection device and a detection method for automobile parts, in particular to a detection device and a detection method for the working capacity of a national six-carbon tank of an automobile.
Background
The carbon tank assembly is a main part for controlling the evaporative emission of the automobile, and is used for adsorbing gasoline vapor from an oil tank and temporarily storing the gasoline vapor.
The working capacity of the automobile carbon tank, including the air tightness and the ventilation resistance (pressure drop) of the carbon tank, are one of important special characteristics of the carbon tank, according to the national evaporative emission industry standard HJ/T390-2007, the ventilation resistance generally refers to adsorption resistance, that is, when steam inside the oil tank volatilizes, the pressure inside the oil tank increases, at this time, the air pressure is released through the carbon tank, hydrocarbon in the air flow is absorbed by the activated carbon, and redundant pressure (air) is released, if the ventilation resistance of the carbon tank is too large, the air pressure cannot be effectively discharged, and a larger air pressure can be sealed inside the oil tank.
1. According to the requirements of national six standards on refueling emission control (ORVR), a large amount of gasoline vapor should rapidly pass through the carbon canister, so the ventilation resistance of the carbon canister must be very small, if the ventilation resistance of the carbon canister is too large, the air pressure cannot be effectively discharged, and the gun is easily jumped in advance;
2. in addition, the oil tank is in a sealed state in the driving process of the automobile, the oil tank needs to maintain normal air pressure through the carbon tank along with the fact that gasoline is continuously output by the oil pump in the driving process of the automobile, if the ventilation resistance of the carbon tank is too large, the oil tank cannot maintain the normal air pressure through the carbon tank, a large negative pressure is formed in the oil tank, and faults that the oil tank is sucked flat, the oil is filled with oil and the like occur;
3. because the national six standards increase the requirement on-line detection (OBD) of the air tightness of a fuel system, a solenoid valve (CVS) must be added to close a vent of a carbon tank, and a pressure sensor (VPS) needs to be added to monitor the pressure change inside the fuel system, therefore, the national six carbon tank generally integrates the solenoid valve (the solenoid valve of the atmosphere port of the carbon tank is installed at the atmosphere port of the carbon tank) and the pressure sensor (the pressure sensor of the carbon tank is installed at the adsorption port of the carbon tank), aiming at the integrated carbon tanks, when the air tightness of the carbon tank is required to be tested, 14kpa of air pressure is applied to the carbon tank after the CVS is closed, the pressure is maintained for 60s, and then whether the leakage rate of the carbon tank meets the requirement.
There are problems in that: at present, a special detection device for the comprehensive performance of the six carbon tanks in the automobile state does not exist, manual measurement is mostly adopted for detection, operation is troublesome, efficiency is low, and detection precision is difficult to guarantee.
Disclosure of Invention
The invention aims to provide a device and a method for detecting the comprehensive performance of a national six-carbon tank of an automobile, so as to overcome the defects in the prior art.
The technical scheme of the invention is as follows: a device for detecting the comprehensive performance of a national six-carbon tank of an automobile is used for detecting the national six-carbon tank of which an adsorption port is provided with a carbon tank pressure sensor and an atmospheric port is provided with an atmospheric port electromagnetic valve, and comprises a detection table, a detection gas circuit and a control unit, wherein the detection gas circuit and the control unit are installed on the detection table;
the detection gas path comprises a gas source, a first pressure regulating valve, a flow control valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve, a balance gas tank, a first differential pressure sensor, a second differential pressure sensor, a detection interface A, a detection interface B and a detection end C which are connected through a pipeline;
the air source is connected with the input end of the flow control valve, a first pressure regulating valve is connected between the flow control valve and the air source, the output end of the flow control valve is connected with the input end of the first electromagnetic valve, and the output end of the first electromagnetic valve is connected with the detection interface A;
second solenoid valve, balanced gas pitcher and first differential pressure sensor in proper order connect in parallel on the pipeline between first solenoid valve and detection interface A, promptly: the output end of the first electromagnetic valve is simultaneously connected with the input end of the second electromagnetic valve, the output end of the second electromagnetic valve is connected with the input end of the balance gas tank, the output end of the balance gas tank is connected with the pressure joint of the first differential pressure sensor, and the other pressure joint of the first differential pressure sensor is connected with the detection interface A through a pipeline;
the pressure joint of the second differential pressure sensor is connected with the detection interface A; the detection interface B is connected with an input port of a third electromagnetic valve, an output port of the third electromagnetic valve is communicated with the atmosphere, and the detection end C is connected with the control unit circuit;
the control ends of the flow control valve, the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve and the detection ends of the first differential pressure sensor and the second differential pressure sensor are respectively connected with the control unit circuit;
the first pressure regulating valve is used for regulating the air pressure output by the air source, the flow control valve is used for controlling the flow and the speed of the air source, the first electromagnetic valve is used for switching on or switching off a vent pipeline leading to the carbon tank to be measured, the second electromagnetic valve is used for switching on or switching off a vent pipeline leading to the balance gas tank, the third electromagnetic valve is used for switching on or switching off a passage leading to a desorption opening of the carbon tank to be measured and atmosphere, the first pressure difference sensor is used for monitoring the pressure difference between the carbon tank to be measured and the balance gas tank, and the second pressure difference sensor is used for monitoring the pressure value of an adsorption;
the control unit includes control module, display screen, pilot lamp and control switch, the effect of control unit: firstly, the opening or closing of a first pressure regulating valve, a flow control valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and an atmosphere port electromagnetic valve is controlled, and secondly, the monitoring data of a first differential pressure sensor, a second differential pressure sensor and a carbon tank pressure sensor are processed, judged and displayed;
the air source is a compressed air source, and 14MPa compressed air is stored in the balance air tank.
The further technical scheme is as follows: a filter is connected between the air source and the first pressure regulating valve, and an air storage tank and a second pressure regulating valve are connected between the first pressure regulating valve and the flow control valve; the filter is used for filtering compressed air sent by the air source, the air storage tank is used for stabilizing air pressure and providing a continuous and stable air source for the test equipment, and the second pressure regulating valve is used for regulating the air pressure sent by the air storage tank.
Further: the detection platform is provided with N detection stations, and the detection gas path comprises A, N detection interfaces B and N detection ends C; during detection, a detected carbon tank is arranged at each detection station, an adsorption port of the detected carbon tank is respectively connected with a corresponding detection interface A, a desorption port of the detected carbon tank is respectively connected with a corresponding detection interface B, and a detection end of a carbon tank pressure sensor on the detected carbon tank and a control end of an atmosphere port electromagnetic valve are respectively connected with a corresponding detection end C;
the value of N is any integer between 1 and 8.
The other technical scheme is as follows: a detection method of a device for detecting the comprehensive performance of a national six-carbon tank of an automobile is a method for detecting the comprehensive performance of the national six-carbon tank of the automobile by using the device for detecting the comprehensive performance of the national six-carbon tank of the automobile, and comprises the following steps:
s1, detection preparation;
s11, installing a carbon tank to be detected on a detection station of a detection table, connecting an adsorption port of the carbon tank with a detection interface A, connecting a desorption port with a detection interface B, and connecting a carbon tank pressure sensor and an atmospheric port electromagnetic valve with a detection end C;
s12, importing detection parameters of the carbon tank according to the model of the carbon tank;
s2, detecting whether a carbon tank pressure sensor is good or not;
s21, outputting a 5V power supply to a carbon tank pressure sensor by a control unit, and entering a test stage of about 1 second;
s22, the control unit reads out the feedback voltage output by the carbon tank pressure sensor in real time and judges according to the set qualified interval of the feedback voltage:
s221, when the feedback voltage output by the carbon tank pressure sensor is not within the qualified interval of 1400 mV-1600 mV, the control unit interrupts the detection program;
s222, when the feedback voltage output by the carbon tank pressure sensor is in a qualified interval, performing comprehensive performance detection on the carbon tank;
s3, detecting the air tightness of the carbon tank:
and the control unit of S31 closes the third electromagnetic valve and the carbon tank atmosphere port electromagnetic valve, opens the first electromagnetic valve and the second electromagnetic valve, and controls the air source to charge the carbon tank through the detection interface A at the speed of 12L/min through the flow control valve:
s32, monitoring an initial pressure value P0 of the carbon tank adsorption port by the second differential pressure sensor, and if the initial pressure value P0 of the carbon tank adsorption port fails to reach 14KPa, interrupting the detection program by the control unit, opening the third electromagnetic valve to enable the desorption port of the carbon tank to be communicated with atmosphere, and reducing the air pressure of the carbon tank to an atmospheric pressure value;
s33, if the initial pressure value P0 of the adsorption port of the carbon tank reaches 14KPa, closing the first electromagnetic on-off valve by the control unit, cutting off the air source of the carbon tank, keeping the pressure value at 60S, and reading the pressure difference value △ P of the first differential pressure sensor;
s34, the control unit calculates the leakage rate of the carbon tank according to the pressure difference value read by the first pressure difference sensor and the following formula:
in the formula:
η is the leak rate in milliliters per minute;
△ P is a pressure difference value, namely the difference value between the pressure value of the adsorption port of the carbon tank and the pressure value of the output port of the balance gas tank, and the unit is kilopascal;
v is the volume of the carbon tank and the unit is milliliter;
t is the test time in minutes;
s35, the control unit compares the calculation result with the set leakage rate, and judges whether the leakage rate is qualified:
s351, if the leakage rate is unqualified, the control unit interrupts the detection program, opens the third electromagnetic valve to enable the desorption port of the carbon tank to be connected with the atmosphere, and reduces the air pressure of the carbon tank to an atmospheric pressure value;
s352, if the leakage rate is qualified, the control unit records and stores the leakage rate of the carbon tank and enters the next performance detection;
s4, detecting the ventilation resistance of the carbon tank:
s41, continuously keeping the first electromagnetic on-off valve closed, closing the second electromagnetic valve and opening the third electromagnetic valve and the carbon tank atmospheric port electromagnetic valve for pressure relief by the control unit;
s42, when the air pressure of the carbon tank is reduced to an atmospheric pressure value, the control unit closes the third electromagnetic valve, opens the first electromagnetic valve, controls the air source to inflate the carbon tank at the rate of 60L/min through the flow control valve, and the second pressure difference sensor monitors the pressure value of the adsorption port of the carbon tank;
s43, the control unit calculates the ventilation resistance of the carbon tank according to the pressure value detected by the second differential pressure sensor and the following ventilation resistance formula of the carbon tank:
in the formula:
p is the ventilation resistance and the unit is kilopascal;
△ P1 is that when the detection device is not connected with a carbon tank, the third electromagnetic valve is closed, the first electromagnetic valve is opened, the air source enters the detection interface A at the speed of 60L/min through the flow control valve, the air source enters the detection interface A through the flow control valve at the speed of 60L/M, and the pressure value read from the second differential pressure sensor is kilopascal;
△ P2 is the pressure value of the carbon tank adsorption port detected by the second differential pressure sensor when the detection device is connected to the carbon tank to detect the ventilation resistance of the carbon tank, and the unit is kilopascal;
and S431, if the ventilation resistance is in accordance with the set qualified range of the ventilation resistance, judging that the ventilation resistance is qualified, and recording and storing the leakage rate of the carbon tank by the control unit to finish the detection.
Due to the adoption of the technical scheme, the device and the method for detecting the comprehensive performance of the national six-carbon tank of the automobile
Has the following beneficial effects:
1. the device for detecting the comprehensive performance of the six carbon tanks in the automobile country can realize the automatic detection of the pressure sensor of the carbon tank, the air tightness of the carbon tank and the ventilation resistance of the carbon tank under the control of the control unit, can obtain a detection result after standard time by starting the equipment after the carbon tank to be detected is connected with the equipment, can record and store detection data, and has high detection precision;
2. the device for detecting the comprehensive performance of the six carbon tanks in the state of the automobile is provided with a control unit, a first differential pressure sensor, a second differential pressure sensor (a pressure measuring unit) and a flow control valve (a flow control unit), can simulate the actual condition of the whole automobile to detect the flow of a pressure air source strictly according to the national evaporative emission standard, accurately detect the pressure of the carbon tanks and the pressure difference between the carbon tanks and a balance air tank, simulate the detection mode of on-line detection (OBD) of the air tightness of a fuel system, and ensure the accuracy and stability of a detection result to be consistent with the actual condition of the whole automobile;
3. the device for detecting the comprehensive performance of the national six-carbon tank of the automobile can detect the comprehensive performance of the national six-carbon tank integrated with the electromagnetic valve and the pressure sensor, and can detect the comprehensive performance of the carbon tank only integrated with the electromagnetic valve or the carbon tank only integrated with the pressure sensor, and only needs to slightly change a detection interface A, a detection interface B and a detection end C (connect the pressure sensor or the electromagnetic valve) during detection;
4. the testing method of the device for detecting the comprehensive performance of the six carbon tanks in the state of the automobile is simple and convenient to operate, can be used for testing a plurality of carbon tanks simultaneously, is high in detection efficiency, enables detection results to be visual, and can store data for further analysis.
The technical features of the device and the method for detecting the comprehensive performance of the six carbon tanks in the automobile country according to the present invention will be further described with reference to the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic diagram of the pipeline and circuit connection of an apparatus for detecting the comprehensive performance of a national six-carbon tank of an automobile according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a usage status of a national six-carbon canister for testing the comprehensive performance of an automobile according to an embodiment of the invention;
FIG. 3 is a schematic diagram of the pipeline and circuit connection of the device for detecting the comprehensive performance of a six-carbon canister in the second embodiment of the invention (detecting a carbon canister without a carbon canister pressure sensor and a carbon canister atmospheric port solenoid valve);
FIG. 4 is a schematic diagram of a usage status of the national six-carbon canister of the vehicle according to the second embodiment of the invention;
fig. 5 is a schematic diagram of the pipeline and circuit connection of the device for detecting the comprehensive performance of the six carbon tanks in the automobile according to the third embodiment of the invention (detecting the carbon tank with only the carbon tank pressure sensor);
FIG. 6 is a schematic diagram of the pipeline and circuit connection of a device for detecting the comprehensive performance of a six-carbon canister in the automobile according to a fourth embodiment of the present invention (detecting a carbon canister with only a carbon canister atmospheric port solenoid valve);
fig. 7 to 10 are schematic structural diagrams of various carbon tanks:
FIG. 7 is a canister with a canister pressure sensor and a canister atmospheric vent solenoid valve, FIG. 8 is a canister with only a canister pressure sensor, FIG. 9 is a canister with only a canister atmospheric vent solenoid valve, and FIG. 10 is a canister without a canister pressure sensor and a canister atmospheric vent solenoid valve;
FIG. 11 is a schematic view of the physical structure of the inspection table of the inspection apparatus;
in the figure: 1-control unit, 101-display screen, 102-pilot lamp, 103-control switch, 2-air supply, 3-filter, 4-first pressure regulating valve, 5-gas holder, 6-second pressure regulating valve, 7-flow control valve, 8-first solenoid valve, 9-second solenoid valve, 10-balance gas holder, 11-first differential pressure sensor, 12-second differential pressure sensor, 13-carbon tank pressure sensor, 14-third solenoid valve, 15-carbon tank atmospheric port solenoid valve, 16-carbon tank, 17-detection platform, 171-first detection station, 172-second detection station, 173-third detection station, 174-fourth detection station.
Detailed Description
Embodiment one (see attached figures 1 and 2)
A device for detecting the comprehensive performance of a national six-carbon tank of an automobile is used for detecting the national six-carbon tank of which an adsorption port is provided with a carbon tank pressure sensor 13 and an atmosphere port is provided with an atmosphere port electromagnetic valve 15; the device comprises a detection table, a detection gas circuit and a control unit 1, wherein the detection gas circuit and the control unit 1 are arranged on the detection table;
the detection gas path comprises a gas source 2, a first pressure regulating valve 4, a flow control valve 7, a first electromagnetic valve 8, a second electromagnetic valve 9, a third electromagnetic valve 14, a balance gas tank 10, a first differential pressure sensor 11, a second differential pressure sensor 12, a detection interface A, a detection interface B and a detection end C;
the gas source 2 is connected with the input end of a flow control valve 7 through a pipeline, a first pressure regulating valve 4 is connected on the pipeline between the flow control valve 7 and the gas source 2, the output end of the flow control valve 7 is connected with the input end of a first electromagnetic valve 8 through a pipeline, and the output end of the first electromagnetic valve 8 is connected with a detection interface A;
the second electromagnetic valve 9, the balance gas tank 10 and the first differential pressure sensor 11 are connected in parallel on the pipeline between the first electromagnetic valve 8 and the detection interface a in sequence, that is: the output end of the first electromagnetic valve 8 is simultaneously connected with the input end of the second electromagnetic valve 9, the output end of the second electromagnetic valve 9 is connected with the input end of the balance gas tank 10, the output end of the balance gas tank 10 is connected with the pressure joint of the first differential pressure sensor 11, and the other pressure joint of the first differential pressure sensor 11 is connected with the detection interface A through a pipeline;
the pressure joint of the second differential pressure sensor 12 is connected with a detection interface A; the detection interface B is connected with an input port of a third electromagnetic valve 14, an output port of the third electromagnetic valve 14 is communicated with the atmosphere, and the detection end C is in circuit connection with the control unit;
the control ends of the flow control valve 7, the first electromagnetic valve 8, the second electromagnetic valve 9 and the third electromagnetic valve 14 and the detection ends of the first differential pressure sensor 11 and the second differential pressure sensor 12 are respectively connected with a control unit circuit;
the first pressure regulating valve 4 is used for regulating the air pressure output by an air source, the flow control valve 7 is used for controlling the flow and the speed of the air source, the first electromagnetic valve 8 is used for switching on or switching off a vent pipeline leading to a carbon tank to be measured, the second electromagnetic valve 9 is used for switching on or switching off a vent pipeline leading to a balance gas tank, the third electromagnetic valve 14 is used for switching on or switching off a passage between a desorption port of the carbon tank to be measured and atmosphere, the first pressure difference sensor 11 is used for monitoring the pressure difference between the carbon tank to be measured and the balance gas tank 10, and the second pressure difference sensor 12 is used for monitoring the pressure value of an adsorption port of the carbon tank;
the control unit 1 comprises a control module (not shown in the drawings), a display screen 101, an indicator light 102 and a control switch 103, and the control unit functions as: firstly, the opening or closing of the first pressure regulating valve 4, the flow control valve 7, the first electromagnetic valve 8, the second electromagnetic valve 9, the third electromagnetic valve 14 and the atmosphere port electromagnetic valve 15 is controlled, and secondly, the monitoring data of the first differential pressure sensor 11, the second differential pressure sensor 2 and the carbon tank pressure sensor 13 are processed, judged and displayed;
the air source 2 is a compressed air source, and 14MPa compressed air is stored in the balance air tank 10.
A filter 3 is connected between the air source and a first pressure regulating valve 4, and an air storage tank 5 and a second pressure regulating valve 6 are connected between the first pressure regulating valve 4 and a flow control valve 7; the filter 3 is used for filtering compressed air sent by the air source 2, the air storage tank 5 is used for stabilizing air pressure and providing a continuous and stable air source for the test equipment, and the second pressure regulating valve 6 is used for regulating the air pressure sent by the air storage tank 5.
The detection table is provided with 4 detection stations, including a first detection station 171, a second detection station 172, a third detection station 173 and a fourth detection station 174 (see fig. 11), and the detection gas path includes 4 detection interfaces a, 4 detection interfaces B and 4 detection ends C (marked in the figure); every detection station installation is surveyed the carbon tank during detection, the detection interface A that corresponds is connected respectively to the absorption mouth of being surveyed the carbon tank, and the detection interface B that corresponds is connected respectively to the desorption mouth of being surveyed the carbon tank, and the detection end C that corresponds is connected respectively to the control end of carbon tank pressure sensor 13 on the carbon tank that is surveyed and atmosphere mouth solenoid valve 15.
Example two (see fig. 3 and 4)
The utility model provides a six carbon canister comprehensive properties detection device in car country, the device is used for detecting the carbon canister that does not have carbon canister pressure sensor and carbon canister atmosphere mouth solenoid valve, its basic structure is roughly the same with the embodiment, the difference is that connect a carbon canister pressure sensor in addition in detection interface A department during the detection, detect interface A and connect the absorption mouth of being surveyed the carbon canister, carbon canister pressure sensor's sense terminal connection control unit, add at carbon canister atmosphere mouth and connect a carbon canister atmosphere mouth solenoid valve, carbon canister atmosphere mouth solenoid valve's control terminal connection control unit.
EXAMPLE III (see FIG. 5)
The utility model provides a six carbon tank comprehensive properties detection device in car country, the device is used for detecting the carbon tank that has carbon tank pressure sensor and does not have carbon tank atmosphere mouth solenoid valve, and its basic structure is roughly the same with embodiment two, and the difference is when detecting that a carbon tank atmosphere mouth adds connects a carbon tank atmosphere mouth solenoid valve, and the control end connection control unit of carbon tank atmosphere mouth solenoid valve.
EXAMPLE four (see FIG. 6)
The utility model provides a six carbon tank comprehensive properties detection device in car country, the device is used for detecting the carbon tank that has carbon tank atmosphere mouth solenoid valve and do not have carbon tank pressure sensor, and its basic structure is roughly the same with embodiment two, and the difference is that connect a carbon tank pressure sensor in addition in detection interface A department, detects the absorption mouth of interface A connection carbon tank under test during the detection, and carbon tank pressure sensor's sense terminal connection control unit.
EXAMPLE five
A detection method of a device for detecting the comprehensive performance of a six-carbon canister of an automobile comprises the following steps:
s1, detection preparation;
s11, installing a carbon tank to be detected on a detection station of a detection table, connecting an adsorption port of the carbon tank with a detection interface A, connecting a desorption port with a detection interface B, and connecting a carbon tank pressure sensor 13 and an atmospheric port electromagnetic valve 15 with a detection end C;
s12, importing detection parameters of the carbon tank according to the model of the carbon tank;
s2, detecting whether a carbon tank pressure sensor is good or not;
s21, the control unit outputs a 5V power supply to the carbon tank pressure sensor 13 and enters a test stage of about 1 second;
s22, the control unit reads out the feedback voltage output by the carbon tank pressure sensor in real time and judges according to the set qualified interval of the feedback voltage:
s221, when the feedback voltage output by the carbon tank pressure sensor 13 is not within the qualified interval of 1400 mV-1600 mV, the control unit interrupts the detection program;
s222, when the feedback voltage output by the carbon tank pressure sensor 13 is in a qualified interval, performing comprehensive performance detection on the carbon tank;
(detecting whether the pressure sensor of the carbon tank is damaged or not to ensure the accuracy of the subsequent test; if the carbon tank is not provided with the pressure sensor, neglecting the step by setting);
s3, detecting the air tightness of the carbon tank:
the control unit of S31 closes the third solenoid valve 14 and the carbon canister atmospheric port solenoid valve 15, opens the first solenoid valve 8 and the second solenoid valve 9, controls the air source to inflate the carbon canister through the detection interface A at the speed of 12L/min through the flow control valve 7:
s32, monitoring an initial pressure value P0 of the carbon tank adsorption port by the second differential pressure sensor 12, and if the initial pressure value P0 of the carbon tank adsorption port fails to reach 14KPa, interrupting the detection program by the control unit, opening the third electromagnetic valve 14 to enable the desorption port of the carbon tank to be communicated with the atmosphere, and reducing the air pressure of the carbon tank to an atmospheric pressure value;
s33, if the initial pressure value P0 of the carbon tank adsorption port reaches 14KPa, closing the first electromagnetic on-off valve 8 by the control unit, cutting off the gas source 2 of the carbon tank, keeping 60S, and reading a pressure difference value △ P of the first pressure difference sensor 11;
s34, the control unit calculates the leakage rate of the carbon tank according to the pressure difference value read by the first pressure difference sensor 11 and the following formula:
in the formula:
η is the leak rate in milliliters per minute;
△ P is a pressure difference value, namely the difference value between the pressure value of the carbon tank adsorption port and the pressure value of the balance gas tank 10 output port, and the unit is kilopascal;
v is the volume of the carbon tank and the unit is milliliter;
t is the test time in minutes;
s35, the control unit compares the calculation result with the set leakage rate, and judges whether the leakage rate is qualified:
s351, if the leakage rate is unqualified, the control unit interrupts the detection program, opens the third electromagnetic valve 14 to enable the desorption port of the carbon tank to be connected with the atmosphere, and reduces the air pressure of the carbon tank to the atmospheric pressure value;
s352, if the leakage rate is qualified, the control unit records and stores the leakage rate of the carbon tank and enters the next performance detection;
(the qualified range of the leakage rate can be set according to the customer standard and is generally 9.5-10 ml/min);
s4, detecting the ventilation resistance of the carbon tank:
s41, continuously keeping the first electromagnetic on-off valve 8 closed, closing the second electromagnetic valve 9 by the control unit, and opening the third electromagnetic valve (14) and the carbon tank atmospheric port electromagnetic valve 15 for pressure relief;
s42, when the air pressure of the carbon tank is reduced to an atmospheric pressure value, the control unit closes the third electromagnetic valve 14, opens the first electromagnetic valve 8, controls the air source to inflate the carbon tank at the rate of 60L/min through the flow control valve, and the second differential pressure sensor 12 monitors the pressure value of the adsorption port of the carbon tank;
s43, the control unit calculates the ventilation resistance of the carbon tank according to the pressure value detected by the second differential pressure sensor 12 and the following formula of the ventilation resistance of the carbon tank:
in the formula:
p is the ventilation resistance and the unit is kilopascal;
△ P1 is that when the detection device is not connected with a carbon tank, the third electromagnetic valve 14 is closed, the first electromagnetic valve 8 is opened, the air source enters the detection interface A at the speed of 60L/min through the flow control valve, and the pressure value read from the second differential pressure sensor 12 is in kilopascals;
△ P2 is the pressure value of the carbon tank adsorption port detected by the second differential pressure sensor 12 when the detection device is connected to the carbon tank to detect the ventilation resistance of the carbon tank, and the unit is kilopascal;
and S431, if the ventilation resistance is in accordance with the set qualified range of the ventilation resistance, judging that the ventilation resistance is qualified, and recording and storing the leakage rate of the carbon tank by the control unit to finish the detection.
(the qualified range of ventilation resistance is set according to the customer standard and is generally 0.6-1.39 KP).
Claims (4)
1. A device for detecting the comprehensive performance of a national six-carbon tank of an automobile is used for detecting the national six-carbon tank of which an adsorption port is provided with a carbon tank pressure sensor (13) and an atmosphere port is provided with an atmosphere port electromagnetic valve (15); the method is characterized in that: the device comprises a detection table, a detection gas circuit and a control unit, wherein the detection gas circuit and the control unit are arranged on the detection table;
the detection gas circuit comprises a gas source (2), a first pressure regulating valve (4), a flow control valve (7), a first electromagnetic valve (8), a second electromagnetic valve (9), a third electromagnetic valve (14), a balance gas tank (10), a first differential pressure sensor (11), a second differential pressure sensor (12), a detection interface A, a detection interface B and a detection end C which are connected through pipelines;
the gas source (2) is connected with the input end of a flow control valve (7), a first pressure regulating valve (4) is connected between the flow control valve (7) and the gas source (2), the output end of the flow control valve (7) is connected with the input end of a first electromagnetic valve (8), and the output end of the first electromagnetic valve (8) is connected with a detection interface A;
the second electromagnetic valve (9), the balance gas tank (10) and the first differential pressure sensor (11) are sequentially connected in parallel on a pipeline between the first electromagnetic valve (8) and the detection interface A, namely: the output end of the first electromagnetic valve (8) is simultaneously connected with the input end of the second electromagnetic valve (9), the output end of the second electromagnetic valve (9) is connected with the input end of the balance gas tank (10), the output end of the balance gas tank (10) is connected with the pressure joint of the first differential pressure sensor (11), and the other pressure joint of the first differential pressure sensor (11) is connected with the detection interface A;
the pressure joint of the second differential pressure sensor (12) is connected with a detection interface A; the detection interface B is connected with an input port of a third electromagnetic valve (14), an output port of the third electromagnetic valve (14) is communicated with the atmosphere, and the detection end C is connected with a control unit circuit;
the control ends of the flow control valve (7), the first electromagnetic valve (8), the second electromagnetic valve (9) and the third electromagnetic valve (14) and the detection ends of the first differential pressure sensor (11) and the second differential pressure sensor (12) are respectively in circuit connection with the control unit;
the first pressure regulating valve (4) is used for regulating the air pressure output by an air source, the flow control valve (7) is used for controlling the flow and the speed of the air source, the first electromagnetic valve (8) is used for switching on or switching off a vent pipeline leading to a carbon tank to be measured, the second electromagnetic valve (9) is used for switching on or switching off a vent pipeline leading to a balance gas tank, the third electromagnetic valve (14) is used for switching on or switching off a desorption port of the carbon tank to be measured and the passage of atmosphere, the first pressure difference sensor (11) is used for monitoring the pressure difference between the carbon tank to be measured and the balance gas tank (10), and the second pressure difference sensor (12) is used for monitoring the pressure value of an adsorption port of;
the control unit (1) comprises a control module, a display screen (101), an indicator lamp (102) and a control switch (103), and the control unit has the following functions: firstly, the opening or closing of a first pressure regulating valve (4), a flow control valve (7), a first electromagnetic valve (8), a second electromagnetic valve (9), a third electromagnetic valve (14) and an atmosphere port electromagnetic valve (15) is controlled, and secondly, the monitoring data of a first differential pressure sensor (11), a second differential pressure sensor (12) and a carbon tank pressure sensor (13) are processed, judged and displayed;
the air source (2) is a compressed air source, and 14MPa compressed air is stored in the balance air tank (10).
2. The device for detecting the comprehensive performance of the automotive six-carbon tank as claimed in claim 1, is characterized in that: a filter (3) is connected between the air source and the first pressure regulating valve (4), and an air storage tank (5) and a second pressure regulating valve (6) are connected between the first pressure regulating valve (4) and the flow control valve (7); the filter (3) is used for filtering compressed air sent by the air source (2), the air storage tank (5) is used for stabilizing air pressure and providing a continuous and stable air source for the test equipment, and the second pressure regulating valve (6) is used for regulating the air pressure sent by the air storage tank (5).
3. The device for detecting the comprehensive performance of the automotive six-carbon tank as claimed in claim 2, characterized in that: the detection platform is provided with N detection stations, and the detection gas path comprises A, N detection interfaces B and N detection ends C; during detection, each detection station is provided with a detected carbon tank, an adsorption port of each detected carbon tank is respectively connected with a corresponding detection interface A, a desorption port of each detected carbon tank is respectively connected with a corresponding detection interface B, and a detection end of a carbon tank pressure sensor (13) of each detected carbon tank and a control end of an atmosphere port electromagnetic valve (15) of each detected carbon tank are respectively connected with a corresponding detection end C;
the value of N is any integer between 1 and 8.
4. A detection method of a device for detecting the comprehensive performance of a national six-carbon tank of an automobile is characterized by comprising the following steps: the method is a method for detecting the comprehensive performance of the national six-carbon tank of the automobile by using the comprehensive performance detection device of the national six-carbon tank of the automobile as claimed in claim 3, and comprises the following steps:
s1, detection preparation;
s11, installing a carbon tank to be detected on a detection station of a detection table, connecting an adsorption port of the carbon tank with a detection interface A, connecting a desorption port with a detection interface B, and connecting a carbon tank pressure sensor (13) and an atmosphere port electromagnetic valve (15) with a detection end C;
s12, importing detection parameters of the carbon tank according to the model of the carbon tank;
s2, detecting whether a carbon tank pressure sensor is good or not;
s21, the control unit outputs a 5V power supply to the carbon tank pressure sensor (13) and enters a test stage of about 1 second;
s22, the control unit reads out the feedback voltage output by the carbon tank pressure sensor in real time and judges according to the set qualified interval of the feedback voltage:
s221, when the feedback voltage output by the carbon tank pressure sensor (13) is not within the qualified interval of 1400 mV-1600 mV, the control unit interrupts the detection program;
s222, when the feedback voltage output by the carbon tank pressure sensor (13) is in a qualified interval, performing comprehensive performance detection on the carbon tank;
s3, detecting the air tightness of the carbon tank:
the S31 control unit closes the third electromagnetic valve (14) and the carbon tank atmospheric port electromagnetic valve (15), opens the first electromagnetic valve (8) and the second electromagnetic valve (9), controls the air source (2) to inflate the carbon tank through the detection interface A at the speed of 12L/min through the flow control valve (7);
s32, monitoring an initial pressure value P0 of the carbon tank adsorption port by the second pressure difference sensor (12), and if the initial pressure value P0 of the carbon tank adsorption port fails to reach 14KPa, interrupting a detection program by a control unit, opening a third electromagnetic valve (14) to enable a desorption port of the carbon tank to be communicated with atmosphere, and reducing the air pressure of the carbon tank to an atmospheric pressure value;
s33, if the initial pressure value P0 of the carbon tank adsorption port reaches 14KPa, closing the first electromagnetic on-off valve (8) by the control unit, cutting off the gas source (2) of the carbon tank, keeping 60S, and reading the pressure difference value △ P of the first differential pressure sensor (11);
s34, the control unit calculates the leakage rate of the carbon tank according to the pressure difference value read by the first pressure difference sensor (11) and the following formula:
in the formula:
η is the leak rate in milliliters per minute;
△ P is a pressure difference value, namely the difference value between the pressure value of the carbon tank adsorption port and the pressure value of the balance gas tank (10) output port, and the unit is kilopascal;
v is the volume of the carbon tank and the unit is milliliter;
t is the test time in minutes;
s35, the control unit compares the calculation result with the set leakage rate, and judges whether the leakage rate is qualified:
s351, if the leakage rate is unqualified, the control unit interrupts the detection program, opens the third electromagnetic valve (14) to enable the desorption port of the carbon tank to be connected with the atmosphere, and reduces the air pressure of the carbon tank to the atmospheric pressure value;
s352, if the leakage rate is qualified, the control unit records and stores the leakage rate of the carbon tank and enters the next performance detection;
s4, detecting the ventilation resistance of the carbon tank:
s41, continuously keeping the first electromagnetic on-off valve (8) closed, closing the second electromagnetic valve (9) by the control unit, and opening the third electromagnetic valve (14) and the carbon tank atmospheric port electromagnetic valve (15) for pressure relief;
s42, when the air pressure of the carbon tank is reduced to an atmospheric pressure value, the control unit closes the third electromagnetic valve (14), opens the first electromagnetic valve (8), controls the air source (2) to inflate the carbon tank at the rate of 60L/min through the flow control valve (7), and monitors the pressure value of the adsorption port of the carbon tank by the second differential pressure sensor (12);
s43, the control unit calculates the ventilation resistance of the carbon tank according to the pressure value detected by the second differential pressure sensor (12) and the following formula of the ventilation resistance of the carbon tank:
in the formula:
p is the ventilation resistance and the unit is kilopascal;
△ P1 is that when the detection device is not connected with a carbon tank, the third electromagnetic valve (14) is closed, the first electromagnetic valve (8) is opened, the air source enters the detection interface A at the speed of 60L/min through the flow control valve, and the pressure value read from the second differential pressure sensor (12) is expressed in kilopascals;
△ P2 is the pressure value of the carbon tank adsorption port detected by the second differential pressure sensor (12) when the detection device is connected to the carbon tank to detect the ventilation resistance of the carbon tank, and the unit is kilopascal;
and S431, if the ventilation resistance is in accordance with the set qualified range of the ventilation resistance, judging that the ventilation resistance is qualified, and recording and storing the leakage rate of the carbon tank by the control unit to finish the detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410752.0A CN111442886A (en) | 2020-05-15 | 2020-05-15 | Device and method for detecting comprehensive performance of national six-carbon tank of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010410752.0A CN111442886A (en) | 2020-05-15 | 2020-05-15 | Device and method for detecting comprehensive performance of national six-carbon tank of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111442886A true CN111442886A (en) | 2020-07-24 |
Family
ID=71650331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010410752.0A Pending CN111442886A (en) | 2020-05-15 | 2020-05-15 | Device and method for detecting comprehensive performance of national six-carbon tank of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111442886A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834240A (en) * | 2020-12-31 | 2021-05-25 | 苏州恩都模塑科技有限公司 | Leakage desorption flow test detection system |
-
2020
- 2020-05-15 CN CN202010410752.0A patent/CN111442886A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112834240A (en) * | 2020-12-31 | 2021-05-25 | 苏州恩都模塑科技有限公司 | Leakage desorption flow test detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201867290U (en) | Air tightness testing device for automobile air-conditioning box | |
| JP3116556B2 (en) | Airtightness check device for fuel tank system of internal combustion engine | |
| US10514315B2 (en) | Sensor unit and airtightness inspection device | |
| KR19980024193A (en) | Method and apparatus for functional testing of containers, especially tank venting devices | |
| CN112290062B (en) | Hydrogen safety test system of fuel cell automobile | |
| CN104343510A (en) | Gasoline car fuel evaporation pollutant control system testing device | |
| CN111442886A (en) | Device and method for detecting comprehensive performance of national six-carbon tank of automobile | |
| WO2023138038A1 (en) | Verification apparatus for parts of vehicle-mounted hydrogen system | |
| US6931919B2 (en) | Diagnostic apparatus and method for an evaporative control system including an integrated pressure management apparatus | |
| CN211855760U (en) | Automobile national six-carbon tank comprehensive performance detection device | |
| CN203069340U (en) | Carbon tank performance detecting device | |
| US20150025781A1 (en) | Canister purge valve leak detection system | |
| CN105092185A (en) | Dual-fuel automobile airtightness and ventilation detection apparatus and control method thereof | |
| CN2849688Y (en) | Standard nozzle with filter | |
| CN112179580A (en) | Leak detection device and leak detection method | |
| CN210269078U (en) | Air tightness measuring device for plastic welding part | |
| CN111579166A (en) | EVAP system fuel vapor leakage detection device | |
| CN213658201U (en) | Hydrogen system detection device | |
| CN209894426U (en) | Automatic airtight test system | |
| CN212721954U (en) | Leak detection device | |
| CN205388531U (en) | Large -scale aqueous vapor solenoid valve detecting system that synthesizes | |
| CN211576491U (en) | Detection apparatus for shunt subassembly | |
| CN110823591A (en) | Detection system for desorption flow of high-load pipeline of automobile carbon tank | |
| CN212030822U (en) | Leakage tester using standard small hole as leakage reference | |
| CN218937688U (en) | System for detecting air tightness of vehicle fuel system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |