CN203485753U - Medium-low pressure fuel tank system - Google Patents
Medium-low pressure fuel tank system Download PDFInfo
- Publication number
- CN203485753U CN203485753U CN201320631606.6U CN201320631606U CN203485753U CN 203485753 U CN203485753 U CN 203485753U CN 201320631606 U CN201320631606 U CN 201320631606U CN 203485753 U CN203485753 U CN 203485753U
- Authority
- CN
- China
- Prior art keywords
- fuel tank
- outlet
- isolation valve
- fuel
- pressure
- 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.)
- Expired - Lifetime
Links
- 239000002828 fuel tank Substances 0.000 title claims abstract description 89
- 238000002955 isolation Methods 0.000 claims abstract description 28
- 238000009413 insulation Methods 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 15
- 239000000446 fuel Substances 0.000 claims description 6
- 239000012774 insulation material Substances 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 3
- 229910052799 carbon Inorganic materials 0.000 abstract 3
- 230000007306 turnover Effects 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 15
- 239000000295 fuel oil Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 239000003502 gasoline Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
The utility model relates to a medium-low pressure fuel tank system. An oil filling pipe is connected to a fuel tank, the outer wall of the fuel tank is wrapped with a heat insulation layer, an oil pump is arranged in the fuel tank, an outlet of the oil pump is connected with an engine through an oil supplying pipe, a turn-over valve is installed on the top wall of the fuel tank, an outlet of the turn-over valve is connected with an inlet of a fuel tank isolation valve, an outlet of the fuel tank isolation valve is connected with an inlet of a carbon tank, an outlet of the carbon tank is connected with an engine, and the oil pump, the fuel tank isolation valve and the engine are connected with an electronic control unit through signal lines respectively and controlled by the electronic control unit. Due to the existence of the heat insulation layer, heat transfer between the external environment and the fuel tank can be greatly reduced, the temperature in the fuel tank is made to fluctuate within a small range, and therefore pressure in the fuel tank can be maintained within the range of medium pressure and low pressure, and amount of oil vapor discharged into the carbon tank is reduced.
Description
Technical field
The utility model relates to a kind of fuel tank, particularly a kind of mesolow fuel tank system.
Background technology
Fuel-engined vehicle needs fuel consumption to produce driving-energy, is provided with oil pump in fuel tank, and oily delivery side of pump is connected with driving engine by fuel feed pipe.Because gasoline is volatile, its saturated vapor pressure is larger, often can reach 70KPa and even arrive 1bar under higher ambient temperature, easily causes plastic fuel tank distortion.
For the fuel-steam pressure in fuel tank is reduced, on the roof of fuel tank, roll-over valve is installed, the outlet of roll-over valve is connected with the entrance of fuel tank isolation valve, the outlet of fuel tank isolation valve is connected with the entrance of canister, the outlet of canister is connected with driving engine, oil pump, fuel tank isolation valve and driving engine are connected with electronic control unit by signal wire (SW) respectively and controlled by electronic control unit, and roll-over valve can automatically be cut off when fuel tank is inverted, and while preventing to overturn, fuel oil overflows.In fuel tank isolation valve, be integrated with temperature sensor and pressure sensor, to survey the temperature and pressure of fuel-steam, when the fuel-steam in fuel tank surpasses setting pressure, fuel tank isolation valve is opened, fuel-steam in casing is constantly absorbed by canister, thereby reduce the pressure of fuel tank inside.Because the gasoline in fuel tank still keeps and evaporates, after after a while, again reach setting pressure, force fuel tank isolation valve again to be opened, canister absorbs fuel-steam again, makes the pressure decreased of box house.So repeatedly, canister can be tending towards saturated gradually, cannot continue to absorb fuel-steam, at this moment needs to open driving engine canister is cleaned to desorption.
In order to reduce fuel-steam, to canister, discharge, reduce fuel loss and environmental pollution, generally as far as possible oil vapour is limited in fuel tank, i.e. it is higher that pressure ratio is opened in the setting of fuel tank isolation valve, and so high pressure has proposed very high requirement to the structural strength of fuel tank.Except adopting metallic material, manufacture fuel tank, for plastic fuel tank, conventionally adopt high-pressure system scheme, at fuel tank outside face, design reinforced rib, in the design of fuel tank upper and lower surface, top connected or the intensity with raising fuel tank in methods such as the coated high duty metal bandages of fuel tank outside face.High-pressure system scheme need to design new Oiltank structure or parts, there is certain development difficulty, increased the design and development cost of fuel tank, while refueling pressure release because tank pressure is larger, having more oil vapour enters in canister, increase canister load and desorption frequency, caused the frequent starting of driving engine.
Utility model content
The purpose of this utility model is, overcomes problems of the prior art, and a kind of mesolow fuel tank system is provided, and can reduce the oil vapour amount that enters canister, alleviates canister load.
For solving above technical matters, a kind of mesolow fuel tank system provided by the utility model, in fuel tank, be provided with oil pump, described oily delivery side of pump is connected with driving engine by fuel feed pipe, on the roof of described fuel tank, roll-over valve is installed, the outlet of described roll-over valve is connected with the entrance of fuel tank isolation valve, the outlet of described fuel tank isolation valve is connected with the entrance of canister, the outlet of described canister is connected with described driving engine, described oil pump, fuel tank isolation valve and driving engine are connected and are controlled by respectively electronic control unit with electronic control unit by signal wire (SW), the outer wall of described fuel tank is coated with thermal insulation layer.
With respect to prior art, the utility model has been obtained following beneficial effect: when fuel tank is under hot environment, the fuel-steam temperature of fuel tank inside is higher, steam pressure is larger, while meeting or exceeding the setting pressure of fuel tank isolation valve, electronic control unit is controlled fuel tank isolation valve and is opened, fuel-steam enters canister, by canister, absorbed, because the outer wall of fuel tank is coated with thermal insulation layer, oil temperature in fuel tank and oil vapour temperature are subject to the impact of ambient temperature less, have so just reduced the evaporation of fuel oil and have entered the oil vapour amount of canister.Same when fuel tank is under low temperature environment, due to the existence of thermal insulation layer, the temperature fluctuation value of fuel tank inside is also well below the undulating quantity of external temperature.
As optimal way of the present utility model, described thermal insulation layer is insulating moulding coating layer.
As optimal way of the present utility model, described thermal insulation layer is thermal insulation material adhered layer.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, accompanying drawing only provides reference and explanation use, non-in order to limit the utility model.
Fig. 1 is the structural representation of the utility model mesolow fuel tank system.
In figure: 1. fuel tank; 1a. thermal insulation layer; 1b. oiling tube; 2. oil pump; 3. roll-over valve; 4. fuel tank isolation valve; 5. canister; 6. driving engine; 7. electronic control unit.
The specific embodiment
As shown in Figure 1, mesolow fuel tank system of the present utility model, is connected with oiling tube 1b on fuel tank 1, and the outer wall of fuel tank 1 is coated with thermal insulation layer 1a.In fuel tank 1, be provided with oil pump 2, the outlet of oil pump 2 is connected with driving engine 6 by fuel feed pipe, roll-over valve 3 is installed on the roof of fuel tank 1, the outlet of roll-over valve 3 is connected with the entrance of fuel tank isolation valve 4, the outlet of fuel tank isolation valve 4 is connected with the entrance of canister 5, the outlet of canister 5 is connected with driving engine 6, oil pump 2, fuel tank isolation valve 4 and driving engine 6 are connected with electronic control unit 7 by signal wire (SW) respectively and controlled by electronic control unit 7, in fuel tank isolation valve, be integrated with temperature sensor and pressure sensor, to survey the temperature and pressure of fuel-steam and to provide signal to electronic control unit.
Thermal insulation layer can adopt insulating moulding coating to be directly coated in fuel tank outer wall formation insulating moulding coating layer, also can paste thermal insulation material at fuel tank outer wall and form thermal insulation material adhered layer.
Electronic control unit 7, by the internal pressure of the pressure sensor monitoring fuel tank in fuel tank isolation valve 4, guarantees that the internal pressure of fuel tank is in the scope of setting.When pressure is for example 20kPa higher than certain value, electronic control unit 7 is controlled fuel tank isolation valves 4 and is opened, and the oil vapour of fuel tank inside is entered to canister 5, until pressure is while being for example 15kPa lower than certain value, fuel tank isolation valve 4 is closed; When pressure is less than certain value for example for-5kPa, fuel tank isolation valve is opened, and makes extraneous air enter fuel tank, until when pressure is greater than 0 kPa, fuel tank isolation valve 4 is closed.Because thermal insulation layer 1a has lower coefficient of thermal conductivity, there is larger heat transmission resistance, can greatly reduce the heat transmission between external environment and fuel tank, the temperature of fuel tank internal is fluctuateed in a less scope, thereby make tank internal pressure maintain in, low pressure range is in-5～20kPa, thereby reduce the oil vapour amount in canister that enters.
The foregoing is only the better possible embodiments of the utility model, non-so limit to scope of patent protection of the present utility model.In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (3)
1. a mesolow fuel tank system, in fuel tank, be provided with oil pump, described oily delivery side of pump is connected with driving engine by fuel feed pipe, on the roof of described fuel tank, roll-over valve is installed, the outlet of described roll-over valve is connected with the entrance of fuel tank isolation valve, the outlet of described fuel tank isolation valve is connected with the entrance of canister, the outlet of described canister is connected with described driving engine, described oil pump, fuel tank isolation valve and driving engine are connected and are controlled by respectively electronic control unit with electronic control unit by signal wire (SW), it is characterized in that: the outer wall of described fuel tank is coated with thermal insulation layer.
2. mesolow fuel tank system according to claim 1, is characterized in that: described thermal insulation layer is insulating moulding coating layer.
3. mesolow fuel tank system according to claim 1, is characterized in that: described thermal insulation layer is thermal insulation material adhered layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320631606.6U CN203485753U (en) | 2013-10-14 | 2013-10-14 | Medium-low pressure fuel tank system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320631606.6U CN203485753U (en) | 2013-10-14 | 2013-10-14 | Medium-low pressure fuel tank system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203485753U true CN203485753U (en) | 2014-03-19 |
Family
ID=50256605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320631606.6U Expired - Lifetime CN203485753U (en) | 2013-10-14 | 2013-10-14 | Medium-low pressure fuel tank system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203485753U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209685A (en) * | 2018-08-24 | 2019-01-15 | 亚普汽车部件股份有限公司 | A kind of new electronic control high-pressure fuel oil system |
| CN110630418A (en) * | 2019-09-26 | 2019-12-31 | 内蒙古工业大学 | Novel pressure reduction protection oil tank |
| CN114704395A (en) * | 2022-05-19 | 2022-07-05 | 江铃汽车股份有限公司 | Novel fuel evaporation emission control system and control method |
| CN114962084A (en) * | 2022-04-26 | 2022-08-30 | 一汽奔腾轿车有限公司 | Fuel evaporation emission control system and control method for hybrid vehicle and application of fuel evaporation emission control system |
-
2013
- 2013-10-14 CN CN201320631606.6U patent/CN203485753U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209685A (en) * | 2018-08-24 | 2019-01-15 | 亚普汽车部件股份有限公司 | A kind of new electronic control high-pressure fuel oil system |
| CN110630418A (en) * | 2019-09-26 | 2019-12-31 | 内蒙古工业大学 | Novel pressure reduction protection oil tank |
| CN114962084A (en) * | 2022-04-26 | 2022-08-30 | 一汽奔腾轿车有限公司 | Fuel evaporation emission control system and control method for hybrid vehicle and application of fuel evaporation emission control system |
| CN114962084B (en) * | 2022-04-26 | 2024-05-14 | 一汽奔腾轿车有限公司 | Fuel evaporation and emission control system and control method for hybrid electric vehicle and application of fuel evaporation and emission control system and control method |
| CN114704395A (en) * | 2022-05-19 | 2022-07-05 | 江铃汽车股份有限公司 | Novel fuel evaporation emission control system and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140319 |
|
| CX01 | Expiry of patent term |