CN214010695U - Leakage point detection device for automobile fuel steam system - Google Patents
Leakage point detection device for automobile fuel steam system Download PDFInfo
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- CN214010695U CN214010695U CN202022647463.0U CN202022647463U CN214010695U CN 214010695 U CN214010695 U CN 214010695U CN 202022647463 U CN202022647463 U CN 202022647463U CN 214010695 U CN214010695 U CN 214010695U
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- choke valve
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- pipeline
- choke
- leakage point
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Abstract
The utility model provides a car fuel steam system leakage point detection device, it includes choke valve subassembly, force pump device and pressure display device, the choke valve subassembly includes first choke valve and second choke valve, and the first pipeline that accesss to the carbon tank solenoid valve is connected through first choke valve to the first kneck of car carbon tank, and the second kneck of carbon tank passes through the second choke valve to be connected the second pipeline that accesss to the fuel tank, and the third interface of carbon tank passes through third tube coupling force pump, be equipped with pressure display device on the third pipeline. The utility model discloses a detection device simple structure adopts electronic circuit control, combines electron digital pressure table, detects more convenient, accurate.
Description
Technical Field
The utility model relates to a vehicle detection technology field, concretely relates to car fuel steam system leakage point detection device.
Background
As the national emission standard is more strict, new methods are added to the emission control of the engine, wherein the new methods comprise leakage detection of the fuel evaporation system, and the detection method can judge whether the fuel evaporation system has leakage. However, this method also has the disadvantage that it is impossible to determine where the specific location of the leak is.
The fuel evaporation system comprises an evaporation leakage diagnosis pump, a pipeline from the diagnosis pump to a carbon tank, the carbon tank, a pipeline from the carbon tank to a front engine, a carbon tank electromagnetic valve, a pipeline from the carbon tank to a fuel tank, the fuel tank and various connectors. The existing repair method is to replace possible related parts in the fuel evaporation system one by one, the method has very low efficiency, the average repair time is about 2 hours per machine, and the cost waste caused by replacing the parts by mistake exists. Therefore, the method can accurately judge the leakage point, has important significance for repair work, can improve the working efficiency and reduce the cost loss caused by misjudgment.
SUMMERY OF THE UTILITY MODEL
To the above problem, the utility model aims at providing a car fuel steam system leakage point detection device, through insert pipeline pressure test system before subdividing the detection, seek the pipe-line system who has the trouble, then pass through diagnostic equipment final definite leakage point again to effectively practice thrift fuel steam system leakage point check-out time. The utility model aims at realizing through the following technical scheme:
the utility model provides an automobile fuel steam system leakage point detection device, it includes choke valve subassembly, force pump device and pressure display device, the choke valve subassembly includes first choke valve and second choke valve, and the first kneck of car carbon tank connects the first pipeline that accesss to the carbon tank solenoid valve through first choke valve, and the second kneck of carbon tank connects the second pipeline that accesss to the fuel tank through second choke valve, and the third interface of carbon tank passes through third tube coupling force pump, be equipped with pressure display device on the third pipeline.
Further, the choke valve assembly further comprises a third choke valve, and a third interface of the carbon tank is connected with a third pipeline through the third choke valve.
Further, the first, second, and third choke valves have quick-connect interfaces. The quick plugging of the choke valve and the pipeline can be realized by adopting the quick connection interface, and the operation efficiency is improved.
Further, the detection device further comprises an electric control switch assembly and a power supply, wherein the first choke valve, the second choke valve and the third choke valve are all electric control choke valves, the three choke valves are respectively connected to the power supply through a first circuit, a second circuit and a third circuit which are connected in parallel, and the electric control switch assembly comprises a first electric control switch, a second electric control switch and a third electric control switch which are respectively arranged on the first circuit, the second circuit and the third circuit and correspondingly control the first choke valve, the second choke valve and the third choke valve.
Further, first automatically controlled switch, second automatically controlled switch and/or third automatically controlled switch are the normal close formula switch, adopt the normal close formula switch for under the condition that does not have relevant operation, the pipeline that the carbon tank is connected is the route, can effectively avoid fuel steam system inside certain node pressure too big or because the diagnostic system pressure that the maloperation to the force pump leads to is too big, thereby ensures the security and the reliability of diagnostic process.
Further, the electric control switch assembly further comprises a fourth electric control switch, the pressure pump adopts an electric pressure pump, the electric pressure pump is connected to the power supply through a fourth circuit, and the fourth electric control switch used for controlling the electric pressure pump is arranged on the fourth circuit.
Furthermore, the electric control switch assembly is integrated on the controller and is controlled by the controller.
Further, pressure display device includes electron digital pressure table, shows the pressure of corresponding system in the testing process through electron digital pressure table, can help the maintainer to know the system state more directly perceivedly more, ensures the rationality and the reliability of maintenance result.
Further, the pressure pump adopts a pneumatic pump.
Further, the third pipeline is provided with a diagnosis pump branch and a pressure pump branch, the diagnosis pump branch is connected with the oil tank sealing diagnosis pump, and the pressure pump branch is connected with the pressure pump.
The utility model discloses a detection device structure is exquisite, and convenient to use can fix a position the pipe-line system that the leakage point was located in the fuel vaporization system fast through the mutually supporting between force pump and the choke valve, and the accurate position of leakage point is further confirmed through sealed diagnostic pump, and the personnel of easily repairing carry out the judgement of trouble, improve work efficiency, and it is high to reduce the cost loss maintenance efficiency that the erroneous judgement leads to; meanwhile, the detection is more convenient and accurate by adopting electronic circuit control and combining an electronic digital pressure gauge.
Drawings
Fig. 1 shows a vehicle fuel vapor system leakage point detection device according to a preferred embodiment of the present invention;
in the figure:
101-a carbon tank; 103-engine intake manifold; 202-pressure pump;
102-a fuel tank; 201-tank seal diagnostic pump; 203-pressure display device.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings.
The utility model provides a car fuel steam system leak point detection device, it includes choke valve subassembly, force pump device and pressure display device, the choke valve subassembly includes first choke valve V1 and second choke valve V2, and the first interface M1 department of car carbon tank 101 connects the first pipeline P1 who accesss to carbon tank solenoid valve V4 through first choke valve V1, and the second interface M2 department of carbon tank connects the second pipeline P2 who accesss to fuel tank 102 through second choke valve V2, and the third interface M3 of carbon tank 101 is connected force pump 202 and the sealed diagnostic pump 201 of fuel tank through the force pump branch road P32 and the diagnostic pump branch road P31 of third pipeline P3 respectively, be equipped with pressure display device 203 on the third pipeline P3.
In the illustrated embodiment, the choke valve assembly further includes a third choke valve V3 connected to a third line P3 at a third port M3 of the canister 101 through a third choke valve V3.
In a preferred embodiment, the first, second and third choke valves have quick connect interfaces. The quick plugging of the choke valve and the pipeline can be realized by adopting the quick connection interface, and the operation efficiency is improved.
In the illustrated embodiment, the detection apparatus further includes an electrically controlled switch assembly and a power supply 300, the first choke valve V1, the second choke valve V2 and the third choke valve V3 are all electrically controlled choke valves, the three choke valves are respectively connected to the power supply 300 through a first circuit L1, a second circuit L2 and a third circuit L3 which are connected in parallel, the electrically controlled switch assembly includes a first electrically controlled switch K1, a second electrically controlled switch K2 and a third electrically controlled switch K3 which are respectively arranged on the first circuit L1, the second circuit L2 and the third circuit L3 and correspondingly control the first choke valve V1, the second choke valve V2 and the third choke valve V3, and the first electrically controlled switch K1, the second electrically controlled switch K2 and the third electrically controlled switch K3 are normally closed switches.
In the illustrated embodiment, the electrically controlled switch assembly further includes a fourth electrically controlled switch K4, the pressure pump 202 is an electric pressure pump, the electric pressure pump 202 is connected to the power source 300 through a fourth circuit L4, and a fourth electrically controlled switch K4 for controlling the electric pressure pump is disposed on the fourth circuit L4.
In a preferred embodiment, the electric control switch assembly is integrated on the controller and is controlled by the controller.
In a preferred embodiment, the pressure display device 203 is an electronic digital pressure gauge.
In a preferred embodiment, the pressure pump is a pneumatic pump.
In a preferred embodiment, the power source is from the vehicle's own ignition.
The utility model discloses a device draws forth the force pump trachea along separate routes that is connected to force pump 202 from the junction of oil tank diagnostic pump and carbon tank, and force pump 202 inflates in to the pipeline through this P32 along separate routes, also follows the pressure of pipeline measurement oil tank sealing system through this simultaneously.
The utility model discloses an operating principle mainly utilizes opening and closing of each pipe connection department of electromagnetic resistance pneumatic valve control fuel steam system, then inflates in to corresponding pipeline through force pump 202, and rethread pressure display device 203's pressure state value judges which part has the leak point, carries out corresponding maintenance or change after the judgement. The following provides a method for leak detection using the present device:
according to the aforesaid explanation, the automatically controlled choke valve is connected to each pipeline, ensures that the pipeline is connected completely, makes each automatically controlled switch connect to cigar lighter department and gets the electricity:
step 1: the first electronic switch K1, the second electronic switch K2 and the third electronic switch K3 for controlling the first choke valve V1, the second choke valve V2 and the third choke valve V3 are all opened, so that all three choke valves are in an unvented state. The fourth electronic control switch K4 for controlling the pressure pump 202 is switched on, the pressure pump 202 is controlled to charge air into the pipeline, and at the moment, whether the pressure can rise to 20hpa or not is observed through the pressure display device 203. If 20hpa is exceeded, it is indicated that there is no leak from the tank seal diagnostic pump 201 to the canister 101. If less than 20hpa indicates a leak from the tank seal diagnostic pump 201 to the canister 101, the tank seal diagnostic pump 201 and the piping connected to the canister 101 need to be repaired or replaced.
Step 2: keeping the fourth electronically controlled switch K4 closed ensures that the control circuit L4 of the pressure pump 203 is switched on and the pressure pump 203 continues to operate. The third electronically controlled switch K3 controlling the third choke valve V3 is closed, the third choke valve V3 is in the vent state, and the first electronically controlled switch K1 and the second electronically controlled switch K2 holding the first choke valve V1 and the second choke valve V2 are open, both choke valves being in the non-vent state. At this time, whether the pressure can be increased to 20hpa is observed by the pressure display device 203. If 20hpa is exceeded, it is an indication that canister 101 is not leaking. If less than 20hpa indicates a leak in canister 101, the canister needs to be repaired or replaced.
And step 3: keeping the fourth electronic control K4 closed allows the pressure pump 202 to continue operating, charging the conduit. The second electronically controlled switch K2 and the third electronically controlled switch K3 that control the second choke valve V2 and the third choke valve V3 are closed to bring the two choke valves into a vent state, and the first electronically controlled switch K1 that controls the first choke valve V1 is opened to bring the first choke valve V1 into a non-vent state. At this time, whether the pressure can be increased to 20hpa was observed by the pressure display device. If 20hpa is exceeded, this indicates that there is no leak in the fuel tank 102 and its piping. If less than 20hpa indicates a leak in the tank and its piping, the tank and its piping may need to be repaired or replaced.
And 4, step 4: keeping the fourth electronic control K4 closed allows the pressure pump 202 to continue operating, charging the conduit. The third electronic switch K3 and the first electronic switch K1 that control the third choke valve V3 and the first choke valve V1 are closed to bring the two choke valves into a vent state, and the second electronic switch K2 that control the second choke valve V2 is opened to bring the second choke valve V2 into an unvented state. At this time, whether the pressure can be increased to 20hpa was observed by the pressure display device. If 20hpa is exceeded, it indicates that canister solenoid valve V4 and its line are not leaking. If less than 20hpa indicates a leak in canister solenoid valve V4 and its lines, the canister solenoid valve and its lines may need to be repaired or replaced.
After the pipelines with problems are determined through the detection process, the oil tank sealing diagnosis pump 201 is adopted to carry out more detailed diagnosis and detection on the corresponding pipelines, and finally specific leakage points are determined.
Finally, it is noted that the above preferred embodiments illustrate rather than limit the invention, and that, although the invention has been described in detail with reference to the above preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the invention as defined by the appended claims; the dimensions shown in the figures and the embodiments are not related to specific physical objects, and are not used for limiting the protection scope of the present invention, and the physical dimensions can be selected and changed according to actual needs.
Claims (10)
1. The utility model provides an automobile fuel steam system leakage point detection device, its characterized in that, includes choke valve subassembly, force pump device and pressure display device, the choke valve subassembly includes first choke valve and second choke valve, and the first pipeline that leads to the carbon tank solenoid valve is connected through first choke valve to the first kneck of car carbon tank, and the second kneck of carbon tank passes through the second choke valve and connects the second pipeline that leads to the fuel tank, and the third interface of carbon tank passes through third tube coupling force pump, be equipped with pressure display device on the third pipeline.
2. A leak detection device for a fuel vapor system of an automobile as recited in claim 1, wherein the choke valve assembly further comprises a third choke valve, and a third port of the canister is connected to the third line through the third choke valve.
3. The apparatus of claim 2, wherein the first choke valve, the second choke valve and the third choke valve have quick-connect interfaces.
4. The vehicle fuel vapor system leakage point detection device of claim 2, further comprising an electrically controlled switch assembly and a power source, wherein the first, second and third choke valves are electrically controlled choke valves, the three choke valves are connected to the power source through a first, second and third parallel circuits, respectively, and the electrically controlled switch assembly comprises a first, second and third electrically controlled switch respectively disposed on the first, second and third circuits and controlling the first, second and third choke valves correspondingly.
5. The device for detecting the leakage point of the automobile fuel vapor system according to claim 4, wherein the first electric control switch, the second electric control switch and/or the third electric control switch are normally closed switches.
6. The device of claim 4, wherein the electrical switch assembly further comprises a fourth electrical switch, the pressure pump is an electric pressure pump, the electric pressure pump is connected to a power supply through a fourth circuit, and the fourth circuit is provided with the fourth electrical switch for controlling the electric pressure pump.
7. A leakage point detection device for an automobile fuel vapor system as claimed in claim 4, wherein the electrical switch assembly is integrated with the controller and is controlled by the controller.
8. A device for detecting leakage points of an automobile fuel vapor system according to any one of claims 1 to 7, wherein the pressure display device comprises an electronic digital pressure gauge.
9. A device for detecting a leakage point of an automobile fuel steam system according to any one of claims 1 to 7, wherein the pressure pump is a pneumatic pump.
10. A leakage point detection device for an automobile fuel vapor system according to any one of claims 1 to 7, wherein the third pipeline is provided with a diagnosis pump branch and a pressure pump branch, the diagnosis pump branch is connected with the oil tank seal diagnosis pump, and the pressure pump branch is connected with the pressure pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022647463.0U CN214010695U (en) | 2020-11-16 | 2020-11-16 | Leakage point detection device for automobile fuel steam system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022647463.0U CN214010695U (en) | 2020-11-16 | 2020-11-16 | Leakage point detection device for automobile fuel steam system |
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| CN214010695U true CN214010695U (en) | 2021-08-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320637A (en) * | 2021-12-31 | 2022-04-12 | 中国第一汽车股份有限公司 | Fuel evaporation leakage detection system and method |
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- 2020-11-16 CN CN202022647463.0U patent/CN214010695U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320637A (en) * | 2021-12-31 | 2022-04-12 | 中国第一汽车股份有限公司 | Fuel evaporation leakage detection system and method |
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