CN206360803U

CN206360803U - Vehicle-mounted CNG/LNG double fuels feeding system

Info

Publication number: CN206360803U
Application number: CN201621400932.6U
Authority: CN
Inventors: 孙伟; 庞学礼
Original assignee: SICHUAN BAOSHENG NEW ENERGY BATTERY CO Ltd
Current assignee: SICHUAN BAOSHENG NEW ENERGY BATTERY CO Ltd
Priority date: 2016-12-20
Filing date: 2016-12-20
Publication date: 2017-07-28
Anticipated expiration: 2026-12-20

Abstract

The utility model discloses a kind of vehicle-mounted CNG/LNG double fuels feeding system, belong to fuel charge technical field.It includes LNG fuel system and CNG fuel system；LNG systems are by the LNG storage tank being sequentially connected, LNG Outlet check valves, current limiter, vaporizer and solenoid valve block into LNG outlets；CNG system is made up of the CNG gas cylinders being sequentially connected, CNG check valves, pressure gauge, pressure reducer, low pressure voltage-stablizer, to CNG outlets；LNG is exported to be connected on CNG/LNG change-over switches with CNG outlets, then is connected respectively with engine.The utility model overcomes the useful load of existing CNG gas burning systems not enough, efficiently solves the problem of existing pure CNG bus gas burning system useful load is not enough, vehicle can easily select CNG or LNG fuel charges by CNG/LNG change-over switches；Effective carrying capacity of motor vehicle fuel is significantly increased, facilitates the selection fuel gas of user flexibility, substantially prolongs the mileages of continuation of automobile.

Description

Vehicle-mounted CNG/LNG double fuels feeding system

Technical field

The utility model is related to fuel feed system, especially automobile fuel feeding system, belongs to fuel charge technology Field.

Background technology

At present, natural gas is as motor vehicle fuel, and its calorific value is high, good economy performance；Engine combustion is abundant, HN in institute's last person's gas (hydronitrogen) and CO (carbon monoxide) content are very low, and the pollution to air is small；It has been widely utilized high pressure steel Bottle storage is used as vehicle fuel.Because natural gas density is small, in order to improve its useful load, pressure is up to 20Mpa, even if such as This, useful load is still extremely limited.

On the other hand, international natural gas trade be mostly can density to greatest extent after liquefaction using natural gas Change, make the feature of its volume-diminished to 1/625, use groove Ship Transportation, after arriving at, unload to LNG（Liquefied natural gas）Ground Stand, still with the state save of liquefied natural gas.

If fuel gas vehicle is only furnished with CNG（Compressed natural gas）System, during in face of LNG aeratings, LNG vaporization, by turning Gaseous natural gas is turned to, then to refueling；Therefore it is uneconomical in economic aspect, security performance is also reduced in secure context, More seriously CNG useful load is limited, constrains the mileages of continuation of vehicle.

Utility model content

In view of the above-mentioned problems, the utility model provides a kind of double fuel feeding system.

The utility model solves the technical scheme that its technical problem used：Vehicle-mounted CNG/LNG double fuels air supply system, Including LNG fuel system and CNG fuel system；LNG systems by the LNG storage tank being sequentially connected, LNG Outlet check valves, current limiter, Vaporizer and solenoid valve block are into LNG outlets；CNG system is by the CNG gas cylinders being sequentially connected, CNG check valves, pressure gauge, decompression Device, low pressure voltage-stablizer composition, to CNG outlets；LNG export with CNG outlet is connected on CNG/LNG change-over switches, then respectively with Engine is connected.

The beneficial effects of the utility model are to overcome the useful load of existing CNG gas burning systems not enough, are efficiently solved existing There is the problem of pure CNG bus gas burning system useful load is not enough, can be with non-by operating the CNG/LNG change-over switches on vehicle Often easily select CNG or LNG fuel charges；Effective carrying capacity of motor vehicle fuel is significantly increased, facilitates the selection of user flexibility Fuel gas, substantially prolongs the mileages of continuation of automobile.

Brief description of the drawings

Fig. 1 is the utility model general structure schematic diagram；

Parts and numbering in figure：

The import of 1-LNG storage tank, 2-LNG storage tank import check valve, 3-LNG storage tank,

4-LNG storage tank Outlet check valves, 5-current limiter, 6-vaporizer, 7-magnetic valve,

8-CNG gas cylinders, 9-CNG import check valves, 10-CNG imports, 11-pressure gauge,

12-pressure reducer, 13-low pressure voltage-stablizer, 14-CNG/LNG change-over switches, 15-engine.

Embodiment

The utility model is further illustrated with reference to embodiment.

Referring to Fig. 1, vehicle-mounted CNG/LNG double fuels air supply system, including LNG fuel system and CNG fuel system；LNG systems System is made up of the LNG storage tank 3 being sequentially connected, the current limiter 5 of LNG Outlet check valves 4, vaporizer 6 and magnetic valve 7, to LNG outlets； CNG system is made up of the CNG gas cylinders 8 being sequentially connected, CNG check valves 9, pressure gauge 11, pressure reducer 12, low pressure voltage-stablizer 13, is arrived CNG is exported；LNG is exported to be connected on CNG/LNG change-over switches 14 with CNG outlets, then is connected respectively with engine 15.

LNG fuel system：LNG gas stations or L-CNG gas stations by LNG imports 1, LNG storage tank import check valve 2, The automobile-used liquid feeding of LNG storage tank 3 is stored.Vehicle is in use, LNG liquid is by LNG storage tank Outlet check valves 4, current limiter 5, in vapour Change in device 6 and vaporize, be converted into gaseous natural gas, gaseous natural gas supplies engine 15 through magnetic valve 7, CNG/LNG change-over switches 14 Use.

CNG fuel system：In CNG gas stations or L-CNG gas stations by CNG imports 10, check valve 9 adds to CNG gas cylinders 8 Gas.In use, high pressure CNG is low pressure natural gas through the decompression of pressure reducer 12, through low pressure voltage-stablizer 13, CNG/LNG change-over switches 14 Burnt for engine 15.

The utility model increases a set of LNG systems on the basis of existing CNG, makes have the double combustion gas of CNG/LNG on vehicle System.Aerating body CNG, or liquid feeding body LNG may be selected in vehicle, once can also add CNG in CNG system simultaneously, add in LNG systems LNG。

CNG is gases at high pressure, up to 20Mpa, and CNG gases are stored in CNG gas cylinders 8, in use, gases at high pressure are through decompression The multi-step pressure reduction of device 12, the voltage stabilizing of low pressure voltage-stablizer 13, through CNG/LNG change-over switches 14, are conveyed to engine 15 and burn.

LNG is cryogenic liquid, and its temperature is -162 DEG C, low pressure storage, and for same volume, its storage capacity is the 625 of normal pressure Times, it is CNG（The Mpa of pressure 20）More than 3 times.

LNG is stored by automobile-used LNG storage tank, in use, LNG liquid is through LNG storage tank Outlet check valves 4, current limiter 5, in vapour Change to be vaporized in device 6 and be converted into natural gas, through magnetic valve 7, through CNG/LNG change-over switches 14, used for engine 15.

Claims

1. a kind of vehicle-mounted CNG/LNG double fuels feeding system, including LNG fuel system and CNG fuel system；Characterized in that, LNG systems are by the LNG storage tank that is sequentially connected（3）, LNG Outlet check valves（4）, current limiter（5）, vaporizer（6）And magnetic valve（7） Composition, to LNG outlets；CNG system is by the CNG gas cylinders that are sequentially connected（8）, CNG check valves（9）, pressure gauge（11）, pressure reducer （12）, low pressure voltage-stablizer（13）Composition, to CNG outlets；LNG is exported is connected to CNG/LNG change-over switches with CNG outlets（14） On, then respectively with engine（15）Connection.