CN205876532U - Natural gas engine cylinder head assembly suitable for multiple spot injection system - Google Patents
Natural gas engine cylinder head assembly suitable for multiple spot injection system Download PDFInfo
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- CN205876532U CN205876532U CN201520390161.6U CN201520390161U CN205876532U CN 205876532 U CN205876532 U CN 205876532U CN 201520390161 U CN201520390161 U CN 201520390161U CN 205876532 U CN205876532 U CN 205876532U
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Abstract
The utility model relates to a natural gas engine cylinder head assembly suitable for multiple spot injection system belongs to natural gas engine technical field, include the integrated integrative cylinder head body with air intake manifold, its characterized in that: still include gas jet pipe, gas jet pipe transition joint, air track, gas burner, gas burner clamp plate and air track fixing bolt with cylinder head body that air intake manifold is integrated integrative on design and processing go out the mounting flange the same with the cylinder figure, go out the screw hole at mounting flange's top design and processing, the unthreaded hole that makes air track fixing bolt pass unthreaded hole, the air track's of gas burner clamp plate unthreaded hole and gas jet pipe transition joint is simultaneously realized three's installation and is fixed, go out gas jet pipe transition joint's mounting hole simultaneously at mounting flange's top design and processing for for providing the mounting hole, gas jet pipe transition joint reaches sealed face, gas nozzle install to air track's the mounting hole and fixed through the gas burner clamp plate.
Description
Technical field
This utility model relates to a kind of cylinder cover of natural gas engine assembly being applicable to multipoint injection system, belongs to natural
Gas technical field of engines.
Background technology
Along with the surge of automobile pollution in world wide, contradiction between oil supply and demand constantly aggravates, simultaneously harmful row of automobile
Put thing and cause serious harm to the mankind and living environment thereof, promote countries in the world formulating various strict vehicle Abgasgesetzs
While carrying out production and the use of specification automobile, start to greatly develop substitute fuel automobile.Natural gas, because its there are cleaning, reserves
Greatly, the advantage of the aspect such as calorific value is high, blowdown is low, its usage economy is good, gas-fueled vehicles develop rapidly, and automobile repacking,
The a complete set of technology of natural gas accumulating and gas station construction also reaches its maturity.
China is the country of a petroleum resources shortage, is but the oil consumption country of Asian-Pacific area maximum, and crude oil externally depends on
Degree of depositing improves year by year, has influence on the energy security of China.The data announced according to State Environmental Protection Administration, China's motor-driven vehicle in 2012
The share rate that gas is emitted in urban atmospheric pollution is up to about 60%.Therefore, develop new-energy automobile, to solving China's stone
The difficult problems such as oil resource is the poorest, environmental pollution is serious are the most necessary.
In recent years, China increases the R&D intensity of new-energy automobile, and the research and development of gas-fueled vehicles is fast in China
Speed is risen.With natural gas as motor vehicle fuel, it is possible not only to save valuable petroleum resources, reduction fuel cost, and conduct
A kind of " cleaning fuel ", can be substantially reduced environmental pollution.
The core of gas-fueled vehicles is natural gas used for automobile electromotor, and the evolution of natural gas used for automobile engine technology is substantially
Experienced by three phases:
Before the first stage is the sixties in 20th century.These stage gas-fueled vehicles are in the minority state such as the former Soviet Union, Italy
Family and area have been developed, and main purpose is with gas generation oil, saves the energy.The technical research in this period is mainly with reference to liquid
Fuel delivery machine technology solves the cornering ability of vehicle, such as startability, operational reliability etc., reduces as far as possible and starts with liquid fuel
The various performance gap of machine, particularly dynamic property gap.Now develop is the mixer type natural gas for carburetor automobile
Engine device.
Second stage is to the beginning of the nineties after the sixties in 20th century.The main purpose in this stage is to solve vehicle exhaust
Emission pollution problem.Owing to gas-fueled vehicles are fewer than the exhaust emission of vapour, diesel vehicle, many countries all widely popularize natural gas vapour
Car.Reduce noxious emission the most further, successively develop the carburetor type automobile for opened loop control supply
And the EFI feeder of opened loop control, have developed the gas-fueled vehicles that the ratio first generation of more environmental protection is advanced.
After phase III is the nineties in 20th century.Owing to gasoline engine has carried out technological improvement, exhaust emission subtracts the most significantly
Few, gas-fueled vehicles advantage is inconspicuous, thus promotes gas-fueled vehicles industry and transform electromotor, develops more advanced
Close loop electronic control, electronic digit controls, single-point and multiple spot EFI, the gas supply system of high pressure direct injection.Particularly 1995
After Nian, natural gas used for automobile electromotor have employed the new techniques such as chemically correct fuel feedback control, lean burn, make automobile-used sky
So gas engine efficiency, economy, emission performance and dynamic property have raising greatly, and natural gas used for automobile engine technology there occurs
Qualitative leap.
The difference of natural gas used for automobile electromotor and conventional engine mainly on fuel supply mode, its technological approaches have with
Lower three kinds:
(1) flexible fuel engine
Dual-purpose fuel technology is mainly applied in spark-ignition engine.On the basis of gasoline engine, retain original fuel oil
Feed system, additionally installs a set of gaskraftstoffzufuhranlage additional.The most both original fuel oil supply system can have been used, it is also possible to use
Existing gaskraftstoffzufuhranlage, but can only be with a kind of fuel during electromotor work.Flexible fuel engine gas combustion at present
Material supply form has two big classes, i.e. ex-cylinder fuel supply and in-cylinder fuel supply.Ex-cylinder fuel supply form mainly includes that inlet mixer premixes
Close injection supply at supply and cylinder external admission door；In-cylinder fuel supply form mainly has cylinder inner high voltage injection supply and low-pressure fuel injection to supply
Gas.
(2) dual fuel engine
Double fuel technology is mainly applied on compression ignition engine.Gaseous fuel draws after passing through the diesel oil compression ignition sprayed on a small quantity
Combustion, say, that with two kinds of fuel during electromotor work.Dual fuel engine gaseous fuel plenum system mainly has two kinds, i.e.
Inner cylinder direct injection and ex-cylinder fuel supply.There are two kinds of forms in ex-cylinder fuel supply: air inlet pipe blender supply and air intake branch spray.Root
According to Pilot diesel flow rate number, dual fuel engine also can be divided into conventional dual fuel engine and micro-natural gas engine that ignites.
(3) single-fuel engine
Single-fuel engine refers to only use natural gas as engine fuel no longer with the electromotor of other fuel.Root
It is designed and optimizes the structure of single fuel vehicle natural gas engine according to the physicochemical characteristic of natural gas used for automobile, by strengthening in cylinder
The measures such as turbulent flow, raising compression ratio, adjustment ignition parameter, fully meet the combustion requirements of natural gas, thus obtain the most dynamic
Power, economy and emission performance.Natural gas engine fuel supply with control system also experienced by mixer machine control formula,
The stages such as blender Electrical Control standard, automatically controlled single point injection formula, electric controlled multi-point injecting type.Fuel supply is different from control system,
The performance of electromotor is the most different, and particularly discharge performance difference is obvious.
Electric-controlled natural gas engine mainly used natural gas automatically controlled single point injection formula to supply in the past, and natural gas is concentrated and is fed to mix
Clutch, air and natural gas mix tailing edge inlet manifold in blender and flow into cylinder.The dynamic of the electromotor of this kind of form is rung
Should be poor, it is impossible to each cylinder air inflow is accurately controlled.Present electric-controlled natural gas engine mainly uses natural gas automatically controlled
Multi-point jetting type supplies, and each cylinder air inflow can accurately be controlled by air supply part, the electromotor dynamic response of this kind of form
Sensitive.But, the feeder structure of the electric controlled multi-point injection-type engine of prior art is complicated, maintenance difficult, sealing part
Many, natural gas leaking often occurs.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of natural gas engine being applicable to multipoint injection system
Machine cylinder head assembly, by feeder and cylinder head assembly integrated design, simplifies structure, reduces sealing part, reduce natural
Gas leakage.
The technical solution of the utility model is achieved in that a kind of natural gas engine being applicable to multipoint injection system
Cylinder head assembly, including the cylinder head body integrated with inlet manifold, it is characterised in that: also include fuel gas injection conduit,
Fuel gas injection conduit transit joint, gas rail, gas nozzle, the gentle rail of gas nozzle pressing plate fix bolt, in described and air inlet
On the cylinder head body that manifold is integrated, Design and Machining goes out the mounting flange identical with number of cylinders, at the top of mounting flange
Design and Machining goes out screwed hole, makes gas rail fix bolt unthreaded hole, the unthreaded hole of gas rail and gas injection also cross gas nozzle pressing plate
The unthreaded hole penetrating conduit transit joint is fixed to the installation realizing three；Top design at mounting flange processes gas injection simultaneously
Penetrate the first installing hole of conduit transit joint, for providing installing hole and sealing surface for fuel gas injection conduit transit joint；Described
Gas nozzle be installed to fix on the second installing hole of gas rail and by gas nozzle pressing plate.
Preferably, the position contacted with the first installing hole 101b of described fuel gas injection conduit transit joint 3 at least sets
Meter processes second seal groove 32；The upper surface at least Design and Machining contacted with gas rail 4 goes out first seal groove
31。
Preferably, the position at least Design and Machining that described gas nozzle 5 contacts with the second installing hole 41 of gas rail 4 goes out one
Individual 3rd seal groove 52.
Preferably, each second installing hole 41 of described gas rail 4 and public air inlet 40 are by a point air inlet 43
Connection.
This utility model have the advantage that (1) by feeder and cylinder head assembly integrated design, simplify structure,
Reduce sealing part, reduce natural gas leaking.(2) every cylinder arranges that an independent fuel gas injection conduit directly sprays natural gas
To helical duct intake mouth, this hybrid mode prevents natural gas from mixing too early with air, it is ensured that each cylinder combustion gas distribution
Uniformity, effectively controls air-fuel ratio, reduces cyclical fluctuation.(3) the natural gas supply device being installed in this kind of structure cylinder head
It is convenient to dismount, easy to maintenance.
Accompanying drawing explanation
Fig. 1 is the cylinder head body outline drawing integrated with inlet manifold of the present utility model.
Fig. 2 is the shape assumption diagram of cylinder head assembly of the present utility model.
Fig. 3 is the sectional view of cylinder head assembly of the present utility model.
Fig. 4 is the structural representation of feeder of the present utility model.
Fig. 5 is the structural representation of gas rail of the present utility model.
Fig. 6 is the front view of gas rail of the present utility model.
Fig. 7 is the sectional view at the A-A position of gas rail of the present utility model.
Fig. 8 is the structural representation of fuel gas injection conduit of the present utility model.
Fig. 9 is the structural representation of fuel gas injection conduit transit joint of the present utility model.
Figure 10 is the structural representation of gas nozzle of the present utility model.
Figure 11 is the structural representation of gas nozzle pressing plate of the present utility model.
Figure 12 is the assembling structural representation of fuel gas injection conduit of the present utility model and fuel gas injection conduit transit joint.
Figure 13 is fuel gas injection conduit of the present utility model, fuel gas injection conduit transit joint and the assembling structure of sealing ring
Picture.
Figure 14 is the picture of gas nozzle of the present utility model and the assembling structure of sealing ring.
Figure 15 is the assembling structural representation of feeder of the present utility model.
Figure 16 is that the feeder of the present utility model fundamental diagram in electric controlled multi-point spraying system is (without starting
Machine).
Wherein reference summary sheet is shown as: 1-cylinder head body；101-mounting flange；101a-screwed hole；101b-
One installing hole；2-fuel gas injection conduit；3-fuel gas injection conduit transit joint；31-the first seal groove；32-the second sealing ring
Groove；33-unthreaded hole；3a, 3b-sealing ring；4-gas rail；The public air inlet of 40-；41-(gas nozzle) the second installing hole；42-unthreaded hole；
43-divides air inlet；5-gas nozzle；51-fixed groove；52-the 3rd seal groove；53-the 4th seal groove；54-air inlet；
5a-gas nozzle pressing plate compacted position；5b-sealing ring；6-gas nozzle pressing plate；61-unthreaded hole；62-compresses end；7-gas rail is fixed
Bolt.
Detailed description of the invention
Describe detailed description of the invention of the present utility model below in conjunction with the accompanying drawings in detail.
Embodiment:
As shown in Figure 1 to 4, a kind of cylinder cover of natural gas engine assembly being applicable to multipoint injection system, including with
The cylinder head body 1 that inlet manifold is integrated, it is characterised in that: also include fuel gas injection conduit 2, fuel gas injection conduit transition
Bolt 7 fixed by joint 3, gas rail 4, gas nozzle 5, the gentle rail of gas nozzle pressing plate 6, described integrated with inlet manifold
Cylinder head body 1 on Design and Machining go out the mounting flange 101 identical with number of cylinders, in the top design of mounting flange 101
Process screwed hole 101a, make gas rail fix the bolt 7 unthreaded hole 61 also cross gas nozzle pressing plate 6, unthreaded hole 42 and of gas rail 4
The unthreaded hole 33 of fuel gas injection conduit transit joint 3 realizes the installation of three and fixes；Simultaneously in the top design of mounting flange 101
Process the first installing hole 101b of fuel gas injection conduit transit joint 3, for providing for fuel gas injection conduit transit joint 3
Installing hole and sealing surface；Described gas nozzle 5 is installed on the second installing hole 41 of gas rail 4 and by gas nozzle pressing plate 6
Fixing.
See Fig. 5, for the structural representation of gas rail of the present utility model, the number of the second installing hole 41 and the gas of electromotor
Cylinder number is identical.See the front view that Fig. 6 is gas rail of the present utility model.See the A-A portion that Fig. 7 is gas rail of the present utility model
The sectional view of position, each second installing hole 41 is connected by a point air inlet 43 with public air inlet 40.See Fig. 8, Fig. 9 and
Figure 12, one end of fuel gas injection conduit 2 coordinates with the corresponding hole of fuel gas injection conduit transit joint 3 installs, and can use interference
Cooperation can also use the mode of welding ensure the intensity connected and guarantee sealing.See Fig. 9, in the second seal groove 32
Coordinate with the first installing hole 101b of cylinder head body 1 after sealing ring is installed, after sealing ring being installed in the first seal groove 31
Gas rail 4 is installed again；See Figure 10, in the 3rd seal groove the 52, the 4th seal groove 53 after fit on sealing ring, by gas injection
On (gas nozzle) second installing hole 41 that mouth 5 is assembled on gas rail 4, rear use gas nozzle pressing plate 6 is fixing (should be noted that combustion
The direction of gas jets 5, it is ensured that combustion gas can enter fuel gas injection conduit 2 from the public air inlet 40 of gas rail 4), each gas injection
The both sides of mouth 5 respectively use a gas rail to fix bolt 7 (seeing Fig. 4), make gas rail fix bolt 7 also cross gas nozzle pressing plate
The unthreaded hole 33 of the unthreaded hole 61 of 6, the unthreaded hole 42 of gas rail 4 and fuel gas injection conduit transit joint 3 realizes the installation of three and fixes.Ginseng
Seeing Figure 13, be the picture after this sub-unit installs sealing ring, the position of color deeper 3a, 3b instruction is sealing ring.See
Figure 14, installs the picture after sealing ring for gas nozzle 5 sub-unit, and the position of 5b instruction is sealing ring, the position of 5a instruction
Compacted position for gas nozzle pressing plate 6.
Public air inlet 40 two ends of gas rail 4, one end connects gas inlet joint, and the other end connects pressure transducer and connects
Head.
As shown in figure 15, for the assembling structural representation of feeder of the present utility model.Combustion gas by gas rail 4 public enter
Pore 40 enters, and is entered the inside of gas nozzle 5 by point air inlet 43 of gas rail 4, under the control of unified signal, according to time
Sequence requires, by fuel gas injection conduit 2, natural gas is directly injected to helical duct intake mouth.
As shown in figure 16, for feeder of the present utility model (part for cylinder cover of natural gas engine assembly) at electricity
Fundamental diagram (without electromotor) in control multipoint injection system.After car load starts, ECU drives electric-control stop valve to open, combustion
Gas enters decompressor from gas cylinder through high pressure filter, enters the public air inlet 40 of gas rail 4 after being depressurized to set pressure；Combustion gas
Nozzle 5 is directly driven by ECU, uses sequence-injection mode, combustion gas is led through the fuel gas injection being embedded on cylinder head body 1
Pipe 2 introduces intake valve front end, forms combustion mixture, enters cylinder combustion.
This utility model uses integrated design, simplifies structure, reduces sealing part, reduces natural gas leaking.Every cylinder cloth
Putting independent 2 natural gass of fuel gas injection conduit and be directly injected to helical duct intake mouth, this hybrid mode prevents
Natural gas mixes too early with air, it is ensured that the uniformity of each cylinder combustion gas distribution, effectively controls air-fuel ratio, reduces cyclical fluctuation.
The natural gas supply device dismounting being installed in this kind of structure cylinder head is convenient, easy to maintenance.
Claims (5)
1. it is applicable to a cylinder cover of natural gas engine assembly for multipoint injection system, including integrated with inlet manifold
Cylinder head body (1), it is characterised in that: also include fuel gas injection conduit (2), fuel gas injection conduit transit joint (3), gas rail
(4), gas nozzle (5), gas nozzle pressing plate (6) gentle rail fix bolt (7), described integrated with inlet manifold
The upper Design and Machining of cylinder head body (1) goes out the mounting flange (101) identical with number of cylinders, at the top of mounting flange (101)
Design and Machining goes out screwed hole (101a), makes gas rail fix bolt (7) also cross the unthreaded hole (61) of gas nozzle pressing plate (6), gas
The unthreaded hole (42) of rail (4) and the unthreaded hole (33) of fuel gas injection conduit transit joint (3) realize the installation of three and fix；Exist simultaneously
The top design of mounting flange (101) processes first installing hole (101b) of fuel gas injection conduit transit joint (3), be used for be
Fuel gas injection conduit transit joint (3) provides installing hole and sealing surface；Described gas nozzle (5) is installed to the of gas rail (4)
Two installing holes (41) are upper and fixed by gas nozzle pressing plate (6).
The cylinder cover of natural gas engine assembly being applicable to multipoint injection system the most according to claim 1, its feature exists
In: the position at least Design and Machining contacted with the first installing hole (101b) of described fuel gas injection conduit transit joint (3) goes out
One the second seal groove (32)；The upper surface at least Design and Machining contacted with gas rail (4) goes out first seal groove (31).
The cylinder cover of natural gas engine assembly being applicable to multipoint injection system the most according to claim 1 and 2, its feature
It is: the position at least Design and Machining that described gas nozzle (5) contacts with second installing hole (41) of gas rail (4) goes out one
Three seal grooves (52).
The cylinder cover of natural gas engine assembly being applicable to multipoint injection system the most according to claim 1 and 2, its feature
It is: each second installing hole (41) of described gas rail (4) is with public air inlet (40) by point air inlet (43) even
Logical.
The cylinder cover of natural gas engine assembly being applicable to multipoint injection system the most according to claim 3, its feature exists
In: each second installing hole (41) of described gas rail (4) is connected by a point air inlet (43) with public air inlet (40).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520390161.6U CN205876532U (en) | 2015-06-08 | 2015-06-08 | Natural gas engine cylinder head assembly suitable for multiple spot injection system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520390161.6U CN205876532U (en) | 2015-06-08 | 2015-06-08 | Natural gas engine cylinder head assembly suitable for multiple spot injection system |
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| Publication Number | Publication Date |
|---|---|
| CN205876532U true CN205876532U (en) | 2017-01-11 |
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| CN201520390161.6U Active CN205876532U (en) | 2015-06-08 | 2015-06-08 | Natural gas engine cylinder head assembly suitable for multiple spot injection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134401A (en) * | 2015-06-08 | 2015-12-09 | 中国第一汽车股份有限公司 | Natural gas engine air cylinder cover assembly suitable for multi-point injection system |
-
2015
- 2015-06-08 CN CN201520390161.6U patent/CN205876532U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105134401A (en) * | 2015-06-08 | 2015-12-09 | 中国第一汽车股份有限公司 | Natural gas engine air cylinder cover assembly suitable for multi-point injection system |
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