CN104564437A - Enhanced-type fuel evaporation discharge control system - Google Patents
Enhanced-type fuel evaporation discharge control system Download PDFInfo
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- CN104564437A CN104564437A CN201410823741.XA CN201410823741A CN104564437A CN 104564437 A CN104564437 A CN 104564437A CN 201410823741 A CN201410823741 A CN 201410823741A CN 104564437 A CN104564437 A CN 104564437A
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- fuel tank
- control system
- solenoid valve
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- fuel
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Abstract
The invention relates to an enhanced-type fuel evaporation discharge control system. The enhanced-type fuel evaporation discharge control system comprises an active carbon vessel and a fuel tank, wherein the active carbon vessel is connected into the fuel tank through a connecting pipe, and the enhanced-type fuel evaporation discharge control system is characterized in that the joint position between the fuel tank and the connecting pipe is sealed by a gravity valve, the top of the fuel tank is provided with a fuel tank steam pressure sensor, the upper part of the active carbon vessel is connected with an air damper body, a diagnosis switch and an air purifying electromagnetic valve are arranged on the connection pipeline between the active carbon vessel and the air damper body, the lower part of the active carbon vessel is externally connected with an external air inlet, and a hydrocarbon detection sensor and a ventilation electromagnetic valve are arranged on the pipeline between the external air inlet and the active carbon vessel. By adopting the enhanced-type fuel evaporation discharge control system, the fuel steam purifying amount and the steam leakage situation of the fuel system can be conveniently and accurately monitored, and an alarm can be issued.
Description
Technical field
The present invention relates to automotive fuel oil system field, be specially a kind of reinforced evaporative emission control system.
Background technique
In traditional evaporative emission control system, its working principle can be summed up as: when variation of ambient temperature, the fuel volatile quantity of gasoline fuel tank strengthens, fuel tank inner vapor increases, pressure strengthens, weight valve is backed down by fuel vapor, fuel vapor enters charcoal canister by pipeline, fuel oil in fuel vapor is adsorbed onto on activated carbon granule by the active carbon in charcoal canister, when motor works in suitable operating mode, purge solenoid valve is opened, under the effect of engine air inlet tube degree of vacuum, fresh air enters charcoal tank from charcoal tank atmosphere entry, fuel oil on activated carbon granule will be adsorbed onto wash away, and be drawn onto in cylinder with the form of oily vapour and burn, thus avoid fuel vapor to flow to befouling environment in air.
But in this evaporative emission control system, usually can not form sealing due to the fuel tank after having refueled, make the oily steam raising amount of fuel tank in whole refueling process larger; And when there is fuel tank rollover or amplitude of rocking is large, gasoline liquid has a strong impact on the reuse efficiency of charcoal canister easily via connecting tube enters charcoal canister, in addition, after fuel-steam in fuel tank is absorbed certain number of times by charcoal tank, if inform that electronic control unit carries out unlatching motor and cleans charcoal tank not in time, charcoal tank then can be caused to absorb saturated, still can make to produce in fuel steam discharge to air to pollute, the requirements such as car load Abgasgesetz cannot be met, while having larger harm to health, also there is potential safety hazard.
Summary of the invention
Technical problem solved by the invention is to provide a kind of reinforced evaporative emission control system, to solve the shortcoming in above-mentioned background technology.
Technical problem solved by the invention realizes by the following technical solutions:
A kind of reinforced evaporative emission control system, comprise charcoal canister and fuel tank, charcoal canister is connected in fuel tank by connecting tube, wherein, described fuel tank is closed by a weight valve in the connection interface position with connecting tube, and fuel tank head is provided with a fuel tank vapor pressure sensor, and described charcoal canister top is connected with throttle body, and connecting pipeline between throttle body is provided with a diagnosis switch and a pure qi (oxygen) solenoid valve, bottom is external outer suction port then, and pipeline between outer suction port and charcoal canister is provided with a charing hydrogen detecting sensor and a ventilation solenoid valve.
In the present invention, described diagnosis switch is normally closed switch.
In the present invention, described pure qi (oxygen) solenoid valve is normally closed solenoid valve, and the solenoid valve that ventilates is normally open solenoid valve.
In the present invention, described diagnosis switch is connected to pressure vacuum gauge.
Beneficial effect: the present invention utilizes purge solenoid valve, the elements such as fuel tank vapor pressure sensor and hydrocarbon detecting sensor can meet the purge amount of OBD II pair of evaporative emission control system and vapour leakage condition monitoring and warn, its structure is simple, economical and practical, Installation and Debugging are simultaneously convenient, effectively can improve energy utilization rate, reduce the discharge amount of waste gas.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of present pre-ferred embodiments.
Wherein: 1, fuel tank lock; 2, oil filling pipe; 3, fuel pump; 4, fuel tank; 5, fuel tank vapor pressure sensor; 6, weight valve; 7, hydrocarbon detecting sensor; 8, ventilation solenoid valve; 9, charcoal canister; 10, switch is diagnosed; 11, purge solenoid valve; 12, throttle body.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
See the preferred embodiment of a kind of reinforced evaporative emission control system of Fig. 1, in the present embodiment, comprise fuel tank 4 and charcoal canister 9, its fuel tank 4 comprises complete fuel tank lock 1, oil filling pipe 2, and be connected with motor by the fuel pump 3 of integrated oil filter in fuel tank 4, and be connected by connecting tube between fuel tank 4 with charcoal canister 9, and connecting tube is also provided with weight valve 6 at fuel tank 4 end.
And charcoal canister 9 middle and upper part is provided with diagnosis switch 10, this diagnosis switch 10 is placed between charcoal canister 9 and purge solenoid valve 11, it is connected to pressure vacuum gauge, for judging whether purge solenoid valve 11 can normally work, and purge solenoid valve 11 top connecting joint air door body 12.Diagnosis switch 10 is in normally off, under normal circumstances, when purge solenoid valve 11 is opened in certain pulsewidth modulation lower part, can read vacuum values from diagnosis switch 10; When purge solenoid valve 11 clamping stagnation is in opening state, condition adjudgement can be carried out by induction-pipe depression numerical information from diagnosis switch 10; And when purge solenoid valve 11 clamping stagnation in off position time, pressure vacuum gauge constantly shows atmospheric pressure.
And fuel tank vapor pressure sensor 5 is placed on fuel tank 4, when the vapor tension in fuel tank 4 is higher or lower than atmospheric pressure, ECU can learn that oil-fired system is not leaked, equal with atmospheric pressure once vapor tension, then illustrate there is vapour leakage.
Ventilation solenoid valve 8 is installed in the fresh air inlet passage of charcoal canister 9, can ensure the sealing of system when it is closed.In addition, between ventilation solenoid valve 8 and charcoal canister 9, be provided with hydrocarbon detecting sensor 7, when detecting that the HC content near charcoal canister 9 exceedes limit value, then make ventilation solenoid valve 8 valve closing by ECU, and warn.
More than show and describe basic principle of the present invention, major character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (4)
1. a reinforced evaporative emission control system, comprise charcoal canister and fuel tank, charcoal canister is connected in fuel tank by connecting tube, it is characterized in that, described fuel tank is closed by a weight valve in the connection interface position with connecting tube, and fuel tank head is provided with a fuel tank vapor pressure sensor, and described charcoal canister top is connected with throttle body, and connecting pipeline between throttle body is provided with a diagnosis switch and a pure qi (oxygen) solenoid valve, bottom is external outer suction port then, and pipeline between outer suction port and charcoal canister is provided with a charing hydrogen detecting sensor and a ventilation solenoid valve.
2. the reinforced evaporative emission control system of one according to claim 1, is characterized in that, described diagnosis switch is normally closed switch.
3. the reinforced evaporative emission control system of one according to claim 1, is characterized in that, described pure qi (oxygen) solenoid valve is normally closed solenoid valve, and the solenoid valve that ventilates is normally open solenoid valve.
4. the reinforced evaporative emission control system of one according to claim 1, is characterized in that, described diagnosis switch is connected to pressure vacuum gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410823741.XA CN104564437A (en) | 2014-12-26 | 2014-12-26 | Enhanced-type fuel evaporation discharge control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410823741.XA CN104564437A (en) | 2014-12-26 | 2014-12-26 | Enhanced-type fuel evaporation discharge control system |
Publications (1)
| Publication Number | Publication Date |
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| CN104564437A true CN104564437A (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410823741.XA Pending CN104564437A (en) | 2014-12-26 | 2014-12-26 | Enhanced-type fuel evaporation discharge control system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108119271A (en) * | 2016-11-30 | 2018-06-05 | 长城汽车股份有限公司 | fuel system and vehicle |
| CN113653583A (en) * | 2021-07-16 | 2021-11-16 | 浙江零跑科技股份有限公司 | Range-extended national six-gasoline fuel system and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323250A (en) * | 2008-07-08 | 2008-12-17 | 奇瑞汽车股份有限公司 | Vehicle fuel oil evaporation control system |
| CN202431402U (en) * | 2011-12-06 | 2012-09-12 | 中国嘉陵工业股份有限公司（集团） | Fuel evaporation control system |
| CN202707293U (en) * | 2012-06-14 | 2013-01-30 | 中国第一汽车股份有限公司 | Fuel oil evaporation control system of automobile |
| CN204299730U (en) * | 2014-11-25 | 2015-04-29 | 奇瑞汽车股份有限公司 | A kind of vehicle fuel oil evaporation discharging system |
| CN204436626U (en) * | 2014-12-26 | 2015-07-01 | 长沙众泰汽车工业有限公司 | A kind of reinforced evaporative emission control system |
-
2014
- 2014-12-26 CN CN201410823741.XA patent/CN104564437A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101323250A (en) * | 2008-07-08 | 2008-12-17 | 奇瑞汽车股份有限公司 | Vehicle fuel oil evaporation control system |
| CN202431402U (en) * | 2011-12-06 | 2012-09-12 | 中国嘉陵工业股份有限公司（集团） | Fuel evaporation control system |
| CN202707293U (en) * | 2012-06-14 | 2013-01-30 | 中国第一汽车股份有限公司 | Fuel oil evaporation control system of automobile |
| CN204299730U (en) * | 2014-11-25 | 2015-04-29 | 奇瑞汽车股份有限公司 | A kind of vehicle fuel oil evaporation discharging system |
| CN204436626U (en) * | 2014-12-26 | 2015-07-01 | 长沙众泰汽车工业有限公司 | A kind of reinforced evaporative emission control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108119271A (en) * | 2016-11-30 | 2018-06-05 | 长城汽车股份有限公司 | fuel system and vehicle |
| CN113653583A (en) * | 2021-07-16 | 2021-11-16 | 浙江零跑科技股份有限公司 | Range-extended national six-gasoline fuel system and control method thereof |
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Application publication date: 20150429 |