CN208605294U - A kind of natural gas engine fuel supply system with return pipe - Google Patents
A kind of natural gas engine fuel supply system with return pipe Download PDFInfo
- Publication number
- CN208605294U CN208605294U CN201820914396.4U CN201820914396U CN208605294U CN 208605294 U CN208605294 U CN 208605294U CN 201820914396 U CN201820914396 U CN 201820914396U CN 208605294 U CN208605294 U CN 208605294U
- Authority
- CN
- China
- Prior art keywords
- air flue
- air
- engine
- return pipe
- natural gas
- 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.)
- Withdrawn - After Issue
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Classifications
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- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The natural gas engine fuel supply system with return pipe that the purpose of this utility model is to provide a kind of, including LNG air accumulator, vaporizer, electronic controlled gas injection device, turbocharger, engine, ECU, LNG air accumulator connects vaporizer by check valve, vaporizer passes through surge tank, voltage-stablizer connects electronic controlled gas injection device, the outlet air flue three of electronic controlled gas injection device, the turbine of the exhaust pipe connection turbocharger of engine, the blower outlet of turbocharger is connected to air flue one, the both ends of air flue two are respectively communicated with air flue one and air flue three, the first end of return pipe is connected to air flue one, the second end of return pipe is connected to air flue two, air flue two is connected to the air inlet pipe of engine by air throttle after converging with air flue three, valve is set on return pipe, fueller connects fuel injector, fuel injector is mounted in engine.After the utility model can be to the load variations of natural gas engine, quick reaction is made, restores revolving speed faster, promote its dynamic response, shortens the response time.
Description
Technical field
The present invention relates to a kind of engine fuel supply systems, specifically natural gas engine fuel supply system
System.
Background technique
Because a large amount of uses of petroleum resources, cause serious environmental pollution.Therefore in order to improve and protect environment.Liquid
Change the range that this clean energy of natural gas enters people's consideration.Natural gas is abundant with amount of storage, cost is relatively low, energy
Many advantages, such as density is high, sulfur content is low, sanitation and hygiene, becomes the ideal fuels of new energy internal combustion engine.
Natural gas engine generally sprays into natural gas in air intake duct at this stage, mixes with air, is re-fed into cylinder.Natural gas
For the amount of injection by solenoid valve control, air mass flow is related with booster.Sparking mode is diesel oil ignited combustion of natural gas.
Natural gas engine is not very well that engine in sudden load change, open by air throttle in the performance of dynamic response
Suddenly change is spent, natural gas injection amount controlled by solenoid valve generates variation, but booster cannot be made sky by inertia effects at once
Throughput changes, therefore the air-fuel ratio of mixer generates variation, is not able to satisfy current working condition, so dynamic response is poor,
It is long that torque is transitioned into the steady working condition time.
Summary of the invention
The purpose of the present invention is to provide can solve the problems, such as a kind of with return pipe of natural gas engine dynamic response difference
Natural gas engine fuel supply system.
The object of the present invention is achieved like this:
A kind of natural gas engine fuel supply system with return pipe of the present invention, it is characterized in that: include LNG air accumulator,
Vaporizer, electronic controlled gas injection device, turbocharger, engine, ECU, LNG air accumulator connect vaporizer, vaporizer by check valve
Electronic controlled gas injection device, the outlet air flue three of electronic controlled gas injection device, the exhaust pipe connection of engine are connected by surge tank, voltage-stablizer
The blower outlet of the turbine of turbocharger, turbocharger is connected to air flue one, and the both ends of air flue two are respectively communicated with air flue one
With air flue three, the first end of return pipe is connected to air flue one, and the second end of return pipe is connected to air flue two, air flue two and air flue three
The air inlet pipe of engine is connected to after converging by air throttle, valve is set on return pipe, fueller connects fuel injector, fuel injector
It is mounted in engine, ECU is separately connected valve, air throttle, electronic controlled gas injection device and engine.
Present invention has an advantage that quick reaction is made after the present invention can be to the load variations of natural gas engine,
Restore revolving speed faster, promote its dynamic response, shortens the response time.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
It illustrates with reference to the accompanying drawing and the present invention is described in more detail:
In conjunction with Fig. 1, a kind of natural gas engine fuel supply system with return pipe of the present invention, including natural gas engine
13, natural gas supply system, air supply system, electric control system ECU 12, diesel oil ignited system.
Natural gas supply system includes LNG storage tank 1, check valve 2, vaporizer 3, surge tank 4, voltage-stablizer 5, electronic controlled gas injection
Device 10, natural gas successively pass through check valve 2, vaporizer 3, surge tank 4, voltage-stablizer 5, electronic controlled gas injection device 10, into air flue and sky
Gas mixing.
Electric control system ECU 12 and natural gas supply system, diesel oil ignited system and natural gas engine 13 connect, for supervising
Natural gas, air and diesel oil flow are surveyed, engine speed, torque, admission pressure, air-fuel ratio control air throttle, fuel injector, spray
Gas device and reflux tube valve.
Air supply system includes booster 8, air flue and return pipe 6, and booster 8 is used for supercharging air, and return pipe is used for
Flow back additional air.
Diesel oil ignited system includes fuel injector 14 and fueller 15, diesel oil ignited natural for spraying to engine 13
Gas.
Natural gas comes out from storage tank 1, successively passes through check valve 2, vaporizer 3, surge tank 4, voltage-stablizer 5 and electronic controlled gas injection
Device 10 is mixed into air flue 39 with air 7, and air 7 is by booster 8, by air flue 1 and air flue 2 17, into air flue
39 mix with natural gas, by air throttle 11, into engine 13.Fueller 15 conveys diesel oil to fuel injector 14, by diesel oil
Engine 13 is sprayed into, ignite natural gas.Electric control system ECU 12 controls natural gas and diesel oil flow by engine parameter.The same day
When right gas engine load increases, when the difference of speed setting value and actual value is more than setting value 10%, electric control system ECU 12 is controlled
The aperture of air throttle 11 processed increases (but gas discharge will not increase at once at this time), and according to the difference of revolving speed, controls oil spout
Device 14 increases the distributive value of diesel oil, then monitors air mass flow, as air mass flow gradually increases, then by electric control system ECU 12
Fuel injector 14 is controlled, the distributive value of diesel oil is reduced, to guarantee that air-fuel ratio is constant, electronic controlled gas injection device 10 is controlled, increases natural gas flow
Amount, eventually arrives at stable state.
When engine load reduces, when the difference of speed setting value and actual value is more than setting value 10%, electric-control system
The aperture that ECU12 controls air throttle 11 reduces, and according to its difference of revolving speed, electric control system ECU 12 controls 6 valve of return pipe and opens
Degree opens 6 valve of return pipe, makes air partial reflux, is back to air flue 1 from air flue 2 17, reduces air and enters mixer
Flow, quickly change air into the flow of such as mixer, while controlling electronic controlled gas injection device 10, it is constant to control air-fuel ratio, with
Outside air charge flow rate is gradually reduced, then controls 6 valve opening of return pipe by electric control system ECU 12, turns down 6 valve of return pipe
Door, eventually arrives at stable state.
Claims (1)
1. a kind of natural gas engine fuel supply system with return pipe, it is characterized in that: including LNG air accumulator, vaporizer, electricity
Air blast, turbocharger, engine, ECU are controlled, LNG air accumulator connects vaporizer by check valve, and vaporizer passes through buffering
Tank, voltage-stablizer connect electronic controlled gas injection device, and the exhaust pipe of the outlet air flue three of electronic controlled gas injection device, engine connects turbocharging
The blower outlet of the turbine of device, turbocharger is connected to air flue one, and the both ends of air flue two are respectively communicated with air flue one and air flue three,
The first end of return pipe is connected to air flue one, and the second end of return pipe is connected to air flue two, and air flue two and air flue three lead to after converging
The air inlet pipe of air throttle connection engine is crossed, valve is set on return pipe, fueller connects fuel injector, and fuel injector is mounted on hair
In motivation, ECU is separately connected valve, air throttle, electronic controlled gas injection device and engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820914396.4U CN208605294U (en) | 2018-06-13 | 2018-06-13 | A kind of natural gas engine fuel supply system with return pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820914396.4U CN208605294U (en) | 2018-06-13 | 2018-06-13 | A kind of natural gas engine fuel supply system with return pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208605294U true CN208605294U (en) | 2019-03-15 |
Family
ID=65662912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820914396.4U Withdrawn - After Issue CN208605294U (en) | 2018-06-13 | 2018-06-13 | A kind of natural gas engine fuel supply system with return pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208605294U (en) |
-
2018
- 2018-06-13 CN CN201820914396.4U patent/CN208605294U/en not_active Withdrawn - After Issue
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190315 Effective date of abandoning: 20210423 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190315 Effective date of abandoning: 20210423 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |