CN204851477U - Engine fuel feed system - Google Patents
Engine fuel feed system Download PDFInfo
- Publication number
- CN204851477U CN204851477U CN201520550879.7U CN201520550879U CN204851477U CN 204851477 U CN204851477 U CN 204851477U CN 201520550879 U CN201520550879 U CN 201520550879U CN 204851477 U CN204851477 U CN 204851477U
- Authority
- CN
- China
- Prior art keywords
- gas
- air
- cylinder
- air inlet
- valve
- 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 - Fee Related
Links
Classifications
-
- 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
Landscapes
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The utility model relates to an engine fuel feed system, including gas house steward, air house steward and cylinder, gas house steward and the gas branch connection that admits air is equipped with a plurality of gas air intake manifold on the gas air intake branch, and every gas air intake manifold's tip is equipped with the gas (air) intake valve, air house steward and the air branch connection that admits air is equipped with a plurality of air air intake manifold on the air air intake branch, every air air intake manifold's tip is equipped with the air (air) intake valve, the cylinder is equipped with a plurality ofly, and every cylinder is connected with a gas air intake manifold and an air air intake manifold respectively, and every cylinder has still met exhaust branch respectively, and exhaust branch all is connected with exhaust manifold. The utility model discloses a system is gas and air clean separation before the inlet casing, thoroughly blocks the interior tempering of intake duct, fires the phenomenon, does not contain the electromagnetism and spouts the valve, and is not high to the requirement of gas cleanliness factor, can further improve generator power.
Description
Technical field
The utility model belongs to gas engine technical field, is specifically related to a kind of engine gas supply system.
Background technique
Gas engine is that inflammable gas enters cylinder by gas supply system, and by spark ignitor, burning produces heat energy and promotes a kind of internal combustion power mechanism that piston runs realization acting.The mode of structure that inflammable gas and the air needed for its burning are mixed to form inflammable mixture is called gas supply pattern, substantially can be divided into external mixture type and internal-mixing two type.
External mixture type refers to that inflammable gas mixes with air via gas mixer in air induction system pipeline, enters suction tude and send into the form of carrying out work by combustion in cylinder after forming inflammable mixture.External mixture type air feed pattern can keep gas and vapor permeation even, makes motor smooth running.But owing to being full of inflammable mixture all the time in suction tude during this system works, so there is following problem:
(1), during the valve overlap of delivery temperature height, the mixed gas that part is flammable enters burning in outlet pipe and causes delivery temperature high, and meanwhile, delivery temperature is high makes scorching hot point increase, and increases detonation probability, limits the further raising of power.
(2) exhaust valve wearing and tearing are large and spark plug life is short in bearing heat load in the places such as external mixture type cylinder cap, piston, bat valve and spark plug, and temperature is high, reduces wear resistance and the life-span of these component.
(3) easily inflammable mixture is abrim blown out in suction tude all the time in tempering, when intake valve to be not closed completely because of wearing and tearing or to form at scorching hot because of carbon deposit overheap, the generation that capital causes tempering to blow out, easily causes the potential safety hazard to equipment or even operator's person.
Internal-mixing refers to inflammable gas directly to send in cylinder head intake duct and mixes near intake valve with air, and intake valve is opened rear inflammable mixture and entered the form of carrying out in firing chamber burning.For internal-mixing gas supply system, air and inflammable gas enter firing chamber respectively, thus can adopt larger valve overlap, realize comparatively ideal scavenging process, effectively reduce heat load; Inflammable mixture is only present in intake valve and cylinder, thus has effectively stopped tempering and blow out phenomenon, safe and reliable.
Mechanical type and electric-controlled type two kinds is divided into again according to the different gas supply system type of gas inlet control system.Patent CN1699730A " a kind of method of gas internal-combustion engine air and combustion gas mixed combustion in cylinder " adopts mechanical type to control, in intake duct, arrange the little valve distribution mechanisms such as camshaft, combustion gas enters in cylinder to mix through the inlet valve port that each cylinder delivered to by little valve distribution mechanism and the fuel gas injection pipe of gas header pipe, combustion gas arm, each cylinder together with air burns through plug ignition.There are the following problems for which: motor is furnished with main gas distribution system and the little distribution device identical with cylinder number, and add great number of driving parts, device fabrication cost significantly increases, and increases breakdown in the motor rate simultaneously.
In electric-controlled type mixed air feed principle and current automobile electrospray motor used similar, combustion gas and air are ejected near intake duct intake valve, and the discharge time of each gas and emitted dose are controlled by the electromagnetic injection valve on intake duct.
Solenoid valve requires higher to Environmental Conditions, and as required, gas is dry, clean, and surrounding interferers is relatively weak.And in actual using process, due to the steam containing a great deal of in gas, tar, admittedly contain the impurity such as thing, the existence of the problems such as surrounding environment undesired signal is strong, make the control stability of solenoid valve poor, even cause electric spray valve constantly to damage the situation constantly changed and be too tired to deal with, have a strong impact on the utilization efficiency of starting.
Aforementioned gas engine is used for the higher rock gas of methane content, coal-seam gas etc., and starts late for the research of high hydrogen-containing gas (as coke-stove gas, refinery tail gas etc.) generation technology, and scale is less.
The ignition quality of high hydrogen-containing gas and rock gas has larger difference.Hydrogen mixes with air, velocity of propagation of flame than methane and air mixture a lot of soon, the maximum velocity of propagation of flame of methane is 37.3cm/s, the maximum velocity of propagation of flame of hydrogen is 291 ~ 310cm/s, its ignition energy is only 15.1 ~ 20.0 μ J, and the ignition energy of general spark plug is not less than 50mJ, ignition duration is not less than 0.5ms, larger than hydrogen more than 3300 times of ignition energy.Therefore, after igniting, hydrogen burns immediately.The firing duration of high hydrogen-containing gas is short, does not almost have delay period during igniting.Concentration limit of ignition flame (percentage by volume) scope is 4.2%-74.2% in addition, is 3 times of methane.These character determine the inflammable and explosive property of high hydrogen-containing gas fuel.The adaptability of general gas motor to high oxygen-containing gas fuel is poor, and the problems such as suction tude tempering, after-burning are very serious.Particularly high power engine, if do not have effective technological means, safety problem is very outstanding.
Shengli Oil Field victory motivation tool once adopted mixed method in EFI to carry out power generation test to perhydrous coal gas, effectively avoided blowing out phenomenon, but because electric spray valve working life is short, quantity is many, electric spray valve consumption is large, and operating cost is high.Change into automatically controlled outer mixed after, still exist and control the problems such as loaded down with trivial details.
Summary of the invention
For being applicable to the growth requirement in this field current, make up the deficiencies in the prior art, the purpose of this utility model is to provide one to be applicable to combustion gas, and especially high hydrogen-containing gas is the in-cylinder direct injection mixed admission engine gas supply system of fuel.
The utility model solves the technological scheme that its technical problem adopts: a kind of engine gas supply system, comprise gas header pipe, air header and cylinder, described gas header pipe is connected with gas inlet arm, described gas inlet arm is provided with multiple gas inlet manifold, and the end of described each gas inlet manifold is provided with gas inlet door; Described air header is connected with air inlet arm, and described air inlet arm is provided with multiple air inlet manifold, and the end of described each air inlet manifold is provided with air inlet door; Described cylinder is provided with multiple, and each cylinder is connected with a gas inlet manifold and an air inlet manifold respectively, and each cylinder is also connected to exhaust branch pipe respectively, and described exhaust branch pipe is all connected with exhaust manifold.
Particularly, the gas inlet door of described gas inlet manifold and the air inlet door of air inlet manifold are placed in cylinder respectively.
Particularly, the end of described exhaust branch pipe is provided with exhaust valve, and described exhaust valve is placed in cylinder.
Particularly, described gas header pipe is provided with gas control valve.
Particularly, described gas inlet door, air inlet door and exhaust valve are all direct is connected with throttle driving mechanism.
The utility model has following beneficial effect:
1, engine gas supply system of the present utility model, before inlet casing, combustion gas is separated completely with air, even if when gas internal-combustion engine long-play rear cylinder lid air valve seat ring weares and teares, combustion gas and air also can not form flammable mixture in intake duct, tempering in thorough blocking-up intake duct, fire phenomenon, security of system is stablized.
2, system only has throttle distribution device, not containing other transmission part, camshaft parts, rocker part etc., and manufacture, easy maintenance, not containing electromagnetism spray valve, not high to combustion gas purity requirements, air inlet can meet air inlet requirement after generally processing, and system run all right is reliable.
3, compared with intake type mixed in tradition, the utility model gas flue, air inflow by electric spray valve or the jet quantitative limitation of little valve, not can further improve generator power.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In figure, 1, gas header pipe, 2, gas control valve, 3, gas inlet arm, 4, gas inlet manifold, 5, gas inlet door, 6, air header, 7, air inlet arm, 8, air inlet manifold, 9, air inlet door, 10, cylinder, 11, exhaust valve, 12, exhaust branch pipe, 13, exhaust manifold.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.
As shown in Figure 1, a kind of engine gas supply system, comprise gas header pipe 1, air header 6 and cylinder 10, described gas header pipe 1 is connected with gas inlet arm 3, described gas inlet arm 3 is provided with multiple gas inlet manifold 4, and the end of described each gas inlet manifold 4 is provided with gas inlet door 5; Described air header 6 is connected with air inlet arm 7, described air inlet arm 7 is provided with multiple air inlet manifold 8, the end of described each air inlet manifold 8 is provided with air inlet door 9, described cylinder 10 is provided with multiple, each cylinder 10 is connected with a gas inlet manifold 4 and an air inlet manifold 8 respectively, each cylinder 10 is also connected to exhaust branch pipe 12 respectively, and described exhaust branch pipe 12 is all connected with exhaust manifold 13.
Particularly, the gas inlet door 5 of described gas inlet manifold 4 and the air inlet door 9 of air inlet manifold 8 are placed in cylinder 10 respectively.
Particularly, the end of described exhaust branch pipe 12 is provided with exhaust valve 11, and described exhaust valve 11 is placed in cylinder 10.
Particularly, described gas header pipe 1 is provided with gas control valve 2.
Particularly, described gas inlet door 5, air inlet door 9 and exhaust valve 11 are all direct is connected with throttle driving mechanism.
Particularly, described gas inlet manifold 4 is mutually isolated with air inlet manifold 8.
Particularly, described gas inlet manifold 4 extends to gas inlet door 5 place, and described air inlet manifold 8 extends to air inlet door 9 place.
Combustion gas enters from gas header pipe 1, enters gas inlet arm 3 through gas control valve 2, and gas inlet arm 3 is dispersed with multiple gas inlet manifold 4, gas inlet manifold 4 extends to gas inlet door 5.Air enters to air inlet arm 7 from air header 6, air inlet arm 7 is dispersed with multiple air inlet manifold 8, air inlet manifold 8 extends to air inlet door 9, gas inlet pipeline and air intake pipe mutually isolated, when intake valve is opened, combustion gas and air enter into cylinder respectively, complete the processes such as mixing, igniting, burning in cylinder.Before gas enters cylinder, combustion gas does not mix with air, has thoroughly blocked tempering.
Gas inlet door 5 on each cylinder, air inlet door 9 be all direct to be connected with throttle driving mechanism, unifiedly control, and saves little valve actuating mechanism; Only on gas header pipe 1, arrange gas control valve 2, adjusting air inflow quantity size, air intake pipe does not establish control valve, remains the lean combustion of combustion gas.
Air intake pipe designs according to full admission amount, by changing setting angle and the profilogram of valve actuating mechanism cam, accurately can control excess air coefficient, ensure that the lean combustion of normal pressure air inlet and combustion gas, reduce delivery temperature, reduce the effluent concentration of NOx simultaneously.System exhaust temperature is low, and exhaust emission is little.
Because in high hydrogen-containing gas, hydrogen has the features such as high diffusibility, velocity of combustion is fast, fire extend is wide, in certain limit, combustion gas injection timing is little on engine output torque impact under different operating mode.Therefore for high hydrogen-containing gas, select the air inlet of piston arrives near, normal pressure air inlet can be realized, save the supercharging device of front end.
The utility model is not limited to above-mentioned mode of execution, and anyone should learn the structural change made under enlightenment of the present utility model, and every have identical or close technological scheme with the utility model, all falls within protection domain of the present utility model.
Technology, shape, structure part that the utility model is not described in detail are known technology.
Claims (5)
1. an engine gas supply system, it is characterized in that, comprise gas header pipe, air header and cylinder, described gas header pipe is connected with gas inlet arm, described gas inlet arm is provided with multiple gas inlet manifold, and the end of described each gas inlet manifold is provided with gas inlet door; Described air header is connected with air inlet arm, and described air inlet arm is provided with multiple air inlet manifold, and the end of described each air inlet manifold is provided with air inlet door; Described cylinder is provided with multiple, and each cylinder is connected with a gas inlet manifold and an air inlet manifold respectively, and each cylinder is also connected to exhaust branch pipe respectively, and described exhaust branch pipe is all connected with exhaust manifold.
2. engine gas supply system according to claim 1, is characterized in that, the gas inlet door of described gas inlet manifold and the air inlet door of air inlet manifold are placed in cylinder respectively.
3. engine gas supply system according to claim 1, is characterized in that, the end of described exhaust branch pipe is provided with exhaust valve, and described exhaust valve is placed in cylinder.
4. engine gas supply system according to claim 1, is characterized in that, described gas header pipe is provided with gas control valve.
5. engine gas supply system according to claim 1, is characterized in that, described gas inlet door, air inlet door and exhaust valve are all direct to be connected with throttle driving mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520550879.7U CN204851477U (en) | 2015-07-28 | 2015-07-28 | Engine fuel feed system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520550879.7U CN204851477U (en) | 2015-07-28 | 2015-07-28 | Engine fuel feed system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204851477U true CN204851477U (en) | 2015-12-09 |
Family
ID=54742032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520550879.7U Expired - Fee Related CN204851477U (en) | 2015-07-28 | 2015-07-28 | Engine fuel feed system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204851477U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901336A (en) * | 2021-02-22 | 2021-06-04 | 中节能宁夏新能源股份有限公司 | Hydrogen-containing industrial tail gas generator set |
-
2015
- 2015-07-28 CN CN201520550879.7U patent/CN204851477U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112901336A (en) * | 2021-02-22 | 2021-06-04 | 中节能宁夏新能源股份有限公司 | Hydrogen-containing industrial tail gas generator set |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206221056U (en) | Internal combustion engine | |
| CN106014694B (en) | Air assisted gas injector, large-diameter gas machine precombustion chamber combustion system and method | |
| CN103758630B (en) | The combustion system of natural gas engine and natural gas engine | |
| CN102322332B (en) | Combustion chamber structure of CNG (Compressed Natural Gas) engine and fuel injection method thereof | |
| CN105971719B (en) | The fuel gas spraying system of two-stroke gas engine and the engine | |
| CN109404123A (en) | A kind of hydrogen in-cylinder direct-jet rotor machine and its control method | |
| CN104081021A (en) | Fuel reactivity stratification in rotary diesel engines | |
| CN206439103U (en) | Internal combustion engine | |
| CN114109587A (en) | Combustion apparatus and system | |
| CN105422256B (en) | A kind of single set fuel feed system suitable for precombustion natural gas engine | |
| CN204851477U (en) | Engine fuel feed system | |
| CN106523166A (en) | Bypass and complementary combustion supercharging system of LNG dual-fuel engine and control method thereof | |
| CN104405496A (en) | Natural gas engine pre-combustion chamber type gas supply device | |
| CN105937462A (en) | Direct injection vortex piston top combustion chamber | |
| CN216240992U (en) | Equivalent combustion engine valve mechanism | |
| CN101208502A (en) | Combustion engine | |
| CN103216316A (en) | Low-temperature combustion method of internal-combustion engine with fuel reformation inside cylinders and system | |
| CN103967660A (en) | Engine air feeding system for coke oven gas generator set | |
| CN202647850U (en) | Pulverized coal igniter | |
| CN207634188U (en) | A kind of natural gas engine of automatic adjustment natural gas and AIR Proportional | |
| CN205206943U (en) | Singly overlap fuel supply system suitable for pre -burning cell -type natural gas engine | |
| CN203847293U (en) | Engine air intake system for coke oven gas generator set | |
| CN102691603B (en) | Gasoline and gas in-cylinder direct injection device and control method thereof | |
| CN201935216U (en) | Biomass energy hybrid fuel ignition system used for coal fired power plant | |
| CN107975432A (en) | A kind of dual fuel engine and its control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151209 Termination date: 20160728 |