CN113606051A - Fuel steam leakage detection device and detection method - Google Patents
Fuel steam leakage detection device and detection method Download PDFInfo
- Publication number
- CN113606051A CN113606051A CN202110965285.2A CN202110965285A CN113606051A CN 113606051 A CN113606051 A CN 113606051A CN 202110965285 A CN202110965285 A CN 202110965285A CN 113606051 A CN113606051 A CN 113606051A
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- Prior art keywords
- tank
- fuel tank
- fuel
- detection device
- carbon tank
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- 238000001514 detection method Methods 0.000 title claims abstract description 34
- 239000000446 fuel Substances 0.000 title claims abstract description 20
- 239000002828 fuel tank Substances 0.000 claims abstract description 57
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 52
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000001301 oxygen Substances 0.000 claims abstract description 36
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 36
- 238000004140 cleaning Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- 238000009530 blood pressure measurement Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 230000006698 induction Effects 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a fuel vapor leakage detection device of a hybrid vehicle, which is characterized by comprising a fuel tank, wherein the fuel tank comprises an upper tank body and a lower tank body, flanges are respectively arranged at the joints of the upper tank body and the lower tank body, a sinking platform is arranged on the upper tank body, a fuel tank access hole is arranged on the sinking platform, a filling pipeline is arranged on the side edge of the fuel tank, one side of the filling pipeline is connected with a carbon tank connector, the other side of the filling pipeline is connected with a fuel tank connector, the fuel tank connector is communicated with the fuel tank through an oil inlet pipe, a pressure detection device is connected between the filling pipeline and the fuel tank, an oxygen sensor is further installed on the fuel tank, the oxygen sensor is electrically connected with an electronic control unit through a wiring harness connector, and the carbon tank connector is connected with the carbon tank through a pipeline. The invention solves the problems that the existing vehicle fuel tank leakage detection is easy to have misjudgment and inconvenient to detect.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a fuel vapor leakage detection device and a detection method.
Background
The monitoring of leakage from a fuel system of a hybrid vehicle is typically in the form of pump pressurization, but when occasional high heat, such as vehicle sloshing, is encountered at high oil vapor pressures and heat transfer occurs, such as diurnal alternating temperature, the pressure increases, creating an artifact of the pressure being provided by the pump, which can lead to inaccurate leakage monitoring.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a fuel vapor leakage detection device for a hybrid vehicle, and solves the problems that misjudgment is easy to exist and detection is inconvenient in the existing vehicle fuel tank leakage detection.
In order to achieve the purpose, the invention adopts the technical scheme that:
mix motor car fuel steam leakage detection device, a serial communication port, including the fuel tank, the fuel tank includes box and lower box, the junction of going up box and lower box is equipped with the turn-ups respectively, go up and seted up one on the box and sink the platform, sink and seted up the oil tank access hole on the platform, the side of fuel tank is equipped with the filling pipeline, one side of filling pipeline is connected with the carbon tank and connects, and the opposite side is connected with the fuel tank and connects, the fuel tank connects and is the connectivity through advancing oil pipe and fuel tank, be connected with pressure measurement device between filling pipeline and the fuel tank, still install oxygen sensor on the fuel tank, oxygen sensor passes through pencil plug connector and electronic control unit electric connection, the carbon tank connects and passes through the pipe connection with the carbon tank.
Preferably, the pressure detection device is including installing the metal joint on filling the pipeline, one side and the pressure sensor articulate of metal joint, the one end that the pressure sensor connects is connected with transmission channel, the last pressure sensor that is connected with of transmission channel, pressure sensor installs the up end at last box, pressure detection device and electronic control unit electric connection.
Preferably, the carbon tank is connected with a carbon tank cleaning valve, a carbon tank opening and closing channel is installed in the carbon tank cleaning valve, and the carbon tank opening and closing channel comprises a coil, a gasket, a push rod and a magnet.
Preferably, a groove is formed in the fuel tank, a through hole is formed in the bottom of the groove and communicated with the inside of the fuel tank, the oxygen sensor is fixedly installed in the groove, the sensing part of the oxygen sensor is attached to the through hole, the aperture of the through hole is D, and D is larger than 0.5mm and smaller than 1 mm.
Preferably, the device is further provided with a warning unit, and the warning unit comprises a warning fault lamp on an instrument panel.
A detection method of a fuel vapor leakage detection device of a hybrid vehicle comprises the following specific steps:
firstly, when leakage needs to be detected, a vehicle is switched to a fuel mode, an engine is started to be in an idling state, the rotating speed of the engine is controlled to be 750-850 revolutions, an electronic control unit sends an instruction to start a carbon tank opening and closing channel installed in a carbon tank cleaning valve, the carbon tank cleaning valve receives a starting signal at the moment, a loop switch of the carbon tank opening and closing channel is opened, a coil of the carbon tank opening and closing channel is electrified and acts with a magnet to enable a push rod to move, so that the channel between the carbon tank and the carbon tank cleaning valve is controlled to be closed, the carbon tank is closed to be connected with the outside atmosphere, and a closed space is formed by a fuel tank system;
step two, the electronic control unit controls the oxygen sensor to work through the wiring harness plug connector, one side of an induction part of the oxygen sensor is in contact with the atmosphere, the other side of the induction part of the oxygen sensor is in contact with the induction part attached to the through hole, the induction part attached to the through hole is in contact with oil vapor in the fuel tank at the moment, the oxygen concentration in the fuel tank is detected by the induction part attached to the through hole of the oxygen sensor after a certain time, and an electromotive force, namely voltage is generated due to different oxygen contents at two sides of the induction chamber;
and step three, the oxygen sensor feeds the voltage information sensed in the step two back to the electronic control unit, the electronic control unit compares the voltage with a reference standard voltage according to the voltage, when the voltage is greater than the standard voltage, the electronic control unit judges that leakage exists, the warning unit starts to work, the alarm fault lamp is lightened, and otherwise, leakage does not exist.
Preferably, the certain time is 30-180 s.
The electronic control unit is internally stored with a standard voltage value which is the voltage value of the fuel tank of the model under the condition of no leakage, and the detected voltage value is compared with the standard voltage value to judge whether the fuel tank leaks. Meanwhile, the oxygen sensor has the advantages of simple structure, quick response, easy maintenance, convenient use, accurate measurement and the like.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
FIG. 2 is a schematic structural diagram of the pressure detecting device of the present invention;
FIG. 3 is a flow chart of the detection method of the present invention;
in the figure: 1. the device comprises a fuel tank, 2, an upper tank body, 3, a lower tank body, 4, a flanging, 5, a sinking platform, 6, a fuel tank access hole, 7, a filling pipeline, 8, a carbon tank joint, 9, a fuel tank joint, 10, an oil inlet pipe, 11, a metal joint, 12, a pressure sensor joint, 13, a transmission channel, 14, a pressure sensor, 15, an oxygen sensor, 16 and a wiring harness plug connector.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The fuel vapor leak detection device for a hybrid vehicle shown in fig. 1 to 3 is characterized by comprising a fuel tank 1, the fuel tank 1 comprises an upper tank body 2 and a lower tank body 3, flanges 4 are respectively arranged at the joints of the upper tank body 2 and the lower tank body 3, the upper box body 2 is provided with a sinking platform 5, the sinking platform 5 is provided with an oil tank access hole 6, a filling pipeline 7 is arranged on the side edge of the fuel tank 1, one side of the filling pipeline 7 is connected with a carbon tank joint 8, the other side is connected with a fuel tank joint 9, the fuel tank joint 9 is communicated with the fuel tank 1 through an oil inlet pipe 10, a pressure detection device is connected between the filling pipeline 7 and the fuel tank 1, still install oxygen sensor 15 on the fuel tank 1, oxygen sensor 15 passes through pencil plug connector 16 and electronic control unit electric connection, the carbon tank connects 8 and carbon tank and passes through the pipe connection.
The pressure detection device comprises a metal joint 11 installed on the filling pipeline 7, one side of the metal joint 11 is connected with a pressure sensor joint 12, one end of the pressure sensor joint 12 is connected with a transmission channel 13, the transmission channel 13 is connected with a pressure sensor 14, the pressure sensor 14 is installed on the upper end face of the upper box body 2, and the pressure detection device is electrically connected with the electronic control unit. The carbon tank is connected with a carbon tank cleaning valve, a carbon tank opening and closing channel is installed in the carbon tank cleaning valve, and the carbon tank opening and closing channel comprises a coil, a gasket, a push rod and a magnet. The fuel tank is characterized in that a groove is formed in the fuel tank 1, a through hole is formed in the bottom of the groove and communicated with the interior of the fuel tank 1, the oxygen sensor 15 is fixedly installed in the groove, the sensing part of the oxygen sensor 15 is attached to the through hole, the aperture of the through hole is D, and D is more than 0.5mm and less than 1 mm. The device is also provided with a warning unit which comprises an alarm fault lamp on the instrument panel.
A detection method of a fuel vapor leakage detection device of a hybrid vehicle comprises the following specific steps:
firstly, when leakage needs to be detected, a vehicle is switched to a fuel mode, an engine is started to be in an idling state, the rotating speed of the engine is controlled to be 750-850 revolutions, an electronic control unit sends an instruction to start a carbon tank opening and closing channel installed in a carbon tank cleaning valve, the carbon tank cleaning valve receives a starting signal at the moment, a loop switch of the carbon tank opening and closing channel is opened, a coil of the carbon tank opening and closing channel is electrified and acts with a magnet to enable a push rod to move, so that the channel between the carbon tank and the carbon tank cleaning valve is controlled to be closed, the carbon tank is closed to be connected with the outside atmosphere, and a closed space is formed by a fuel tank system;
step two, the electronic control unit controls the oxygen sensor 15 to work through the wiring harness plug connector 16, one side of a sensing part of the oxygen sensor 15 is in contact with the atmosphere, the other side of the sensing part is in contact with a sensing part attached to the through hole, the sensing part attached to the through hole is in contact with oil vapor in the fuel tank, after a certain time, the sensing part attached to the through hole of the oxygen sensor detects the oxygen concentration in the fuel tank, and an electromotive force, namely a voltage, is generated due to different oxygen contents at two sides of the sensing chamber;
and step three, the oxygen sensor 15 feeds the sensed voltage information in the step two back to the electronic control unit, the electronic control unit compares the voltage with a reference standard voltage according to the voltage, when the voltage is higher than the standard voltage, the electronic control unit judges that leakage exists, the warning unit starts to work, the alarm fault lamp is lightened, and otherwise, leakage does not exist. The certain time is 30-180 s.
The electronic control unit is internally stored with a standard voltage value which is the voltage value of the fuel tank of the model under the condition of no leakage, and the detected voltage value is compared with the standard voltage value to judge whether the fuel tank leaks. Meanwhile, the oxygen sensor 15 has the advantages of simple structure, quick response, easy maintenance, convenient use, accurate measurement and the like. The design improves the accuracy of leakage monitoring, avoids misjudgment of the past inflator pump monitoring, reduces leakage risks, and reduces environmental pollution and personal risks of drivers and passengers.
The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (7)
1. Mix motor car fuel steam leakage detection device, its characterized in that, including fuel tank (1), fuel tank (1) includes box (2) and lower box (3), the junction of going up box (2) and lower box (3) is equipped with turn-ups (4) respectively, go up and seted up a heavy platform (5) on box (2), set up oil tank access hole (6) on heavy platform (5), the side of fuel tank (1) is equipped with filling pipeline (7), one side of filling pipeline (7) is connected with carbon tank joint (8), and the opposite side is connected with fuel tank joint (9), fuel tank joint (9) are the connectivity through advancing oil pipe (10) and fuel tank (1), be connected with pressure measurement between filling pipeline (7) and fuel tank (1), still install oxygen sensor (15) on (1), the oxygen sensor (15) is electrically connected with the electronic control unit through a wiring harness plug connector (16), and the carbon tank joint (8) is connected with the carbon tank through a pipeline.
2. The fuel vapor leakage detection device for the hybrid vehicle according to claim 1, wherein the pressure detection device comprises a metal joint (11) installed on the filling pipe (7), one side of the metal joint (11) is connected with a pressure sensor joint (12), one end of the pressure sensor joint (12) is connected with a transmission channel (13), the transmission channel (13) is connected with a pressure sensor (14), the pressure sensor (14) is installed on the upper end face of the upper box body (2), and the pressure detection device is electrically connected with the electronic control unit.
3. The fuel vapor leakage detection device for the hybrid vehicle according to claim 1, wherein the carbon tank is connected with a carbon tank cleaning valve, a carbon tank opening and closing channel is installed in the carbon tank cleaning valve, and the carbon tank opening and closing channel comprises a coil, a gasket, a push rod and a magnet.
4. The fuel vapor leakage detection device for the hybrid vehicle as claimed in claim 1, wherein a groove is formed in the fuel tank (1), a through hole is formed in the bottom of the groove and communicated with the inside of the fuel tank (1), the oxygen sensor (15) is fixedly installed in the groove, a sensing part of the oxygen sensor (15) is attached to the through hole, the aperture of the through hole is D, and D is greater than 0.5mm and less than 1 mm.
5. The fuel vapor leak detection device for a hybrid vehicle according to claim 1, further comprising a warning unit including a warning trouble lamp on an instrument panel.
6. A method for detecting a fuel vapor leak detection device for a hybrid vehicle according to claims 1 to 5, comprising the steps of:
firstly, when leakage needs to be detected, a vehicle is switched to a fuel mode, an engine is started to be in an idling state, the rotating speed of the engine is controlled to be 750-850 revolutions, an electronic control unit sends an instruction to start a carbon tank opening and closing channel installed in a carbon tank cleaning valve, the carbon tank cleaning valve receives a starting signal at the moment, a loop switch of the carbon tank opening and closing channel is opened, a coil of the carbon tank opening and closing channel is electrified and acts with a magnet to enable a push rod to move, so that the channel between the carbon tank and the carbon tank cleaning valve is controlled to be closed, the carbon tank is closed to be connected with the outside atmosphere, and a closed space is formed by a fuel tank system;
step two, the electronic control unit controls an oxygen sensor (15) to work through a wiring harness plug connector (16), one side of a sensing part of the oxygen sensor (15) is in contact with the atmosphere, the other side of the sensing part is in contact with a sensing part attached to the through hole, the sensing part attached to the through hole is in contact with oil vapor in the fuel tank, the oxygen concentration in the fuel tank is detected by the sensing part attached to the through hole of the oxygen sensor after a certain time, and an electromotive force, namely voltage, is generated due to different oxygen contents at two sides of a sensing chamber;
and step three, the oxygen sensor (15) feeds the voltage information sensed in the step two back to the electronic control unit, the electronic control unit compares the voltage with a reference standard voltage according to the voltage, when the voltage is higher than the standard voltage, the electronic control unit judges that leakage exists, the warning unit starts to work, the alarm fault lamp is lightened, and otherwise, leakage does not exist.
7. The detection method of the fuel vapor leakage detection device for the hybrid vehicle according to claim 6, wherein the certain time is 30s to 180 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110965285.2A CN113606051A (en) | 2021-08-23 | 2021-08-23 | Fuel steam leakage detection device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110965285.2A CN113606051A (en) | 2021-08-23 | 2021-08-23 | Fuel steam leakage detection device and detection method |
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| CN113606051A true CN113606051A (en) | 2021-11-05 |
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| CN202110965285.2A Pending CN113606051A (en) | 2021-08-23 | 2021-08-23 | Fuel steam leakage detection device and detection method |
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2021
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