CN208057260U - A kind of multi-point injection natural gas engine - Google Patents
A kind of multi-point injection natural gas engine Download PDFInfo
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- CN208057260U CN208057260U CN201721837885.6U CN201721837885U CN208057260U CN 208057260 U CN208057260 U CN 208057260U CN 201721837885 U CN201721837885 U CN 201721837885U CN 208057260 U CN208057260 U CN 208057260U
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- gas
- pipe
- fuel gas
- air intake
- natural gas
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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 utility model discloses a kind of multi-point injection natural gas engines, including cylinder body and the multiple air intake ducts being arranged on cylinder body, it is both provided with for the fuel gas injection pipe to intake port injection combustion gas in each air intake duct, mounting hole is provided on cylinder body, fuel gas injection pipe is fixed on mounting hole, and the jet port of fuel gas injection pipe is located at the end of corresponding air intake duct.Above-mentioned multi-point injection natural gas engine, the gaseous mixture that can not only shorten natural gas and air enter the time of cylinder, so that the speed that combustion gas enters cylinder can be promoted, can also promote the transient response of engine；And can arrange fuel gas injection pipe in the end of each air intake duct for more engine intake valves, and then ensure that the consistency of the air inflow of each air intake duct.
Description
Technical field
The utility model is related to technical field of engines more particularly to a kind of multi-point injection natural gas engines.
Background technology
It is single point injection and multi-point injection respectively at present there are mainly two types of the intake methods of natural gas engine, wherein single
Point injection refers to that fuel has been mixed with air before entering air intake duct, is mixed fuel into air intake duct；Multiple spot
Injection refers to natural gas by the direct air inlet of each nozzle, and gas inlet can be controlled by controlling single-nozzle.
Current multi-point injection natural gas engine, major technique are all in air inlet pipe or inlet manifold installation fuel spray
Mouth, and extend the air intake duct for going deep into cylinder cap through gas-guide tube again, however, being limited by Inlet Complex shape, gas-guide tube
The distance for being deep into cylinder cap air intake duct is limited, and in particular for more engine intake valves, gas-guide tube is deep into each air inlet of cylinder cap
Road is more difficult, therefore there are air inlet low-responses for existing multi-point injection natural gas engine, and air inlet mixing uniformity is poor, each cylinder
Air inlet consistency is poor, and more engine intake valves can not ensure the consistency of each inlet valve air inlet.
In conclusion multi-point injection natural gas engine how is solved there are air inlet low-response, and more engine intake valves
The problem of can not ensureing the consistency of each inlet valve air inlet, it has also become those skilled in the art's technical barrier urgently to be resolved hurrily.
Utility model content
The purpose of this utility model is to provide a kind of multi-point injection natural gas engine, is sent out to avoid multi-point injection natural gas
The problem of motivation air inlet low-response, while ensureing the consistency of each inlet valve air inlet of more engine intake valves.
To achieve the goals above, the utility model provides a kind of multi-point injection natural gas engine, including cylinder body
With the multiple air intake ducts being arranged on the cylinder body, it is both provided in each air intake duct for the intake port injection
The fuel gas injection pipe of combustion gas is provided with mounting hole on the cylinder body, and the fuel gas injection pipe is fixed on the mounting hole, and
The jet port of the fuel gas injection pipe is located at the end of the corresponding air intake duct.
Preferably, the jet port includes multiple spray-holes, and the spray-hole uniform cloth on the fuel gas injection pipe
It sets.
Preferably, the end of each air intake duct is both provided with multiple fuel gas injection pipes.
Preferably, the gas nozzle for controlling injection flow is respectively connected on each fuel gas injection pipe.
Preferably, the fuel gas injection Guan Jun is integrated in by Gas Pipe on a gas rail, and the gas nozzle is arranged
On the gas rail.
Preferably, the Gas Pipe is to be threadedly coupled with the fuel gas injection pipe.
Preferably, the fuel gas injection pipe and the mounting hole are interference fit.
Preferably, the beamline apertures for arranging the Gas Pipe are provided on the cylinder body, the Gas Pipe passes through beam
Line block is fixed in the beamline apertures.
Preferably, the non-intrusive end of the fuel gas injection pipe is provided with fixed plate, and the fixed plate is bolted on
On the cylinder body.
Preferably, it is provided with gasket in the fixed plate and the fit clearance of the cylinder body.
Content, above-mentioned multi-point injection natural gas engine, including cylinder body are introduced compared to background technology and are arranged in cylinder
Multiple air intake ducts on lid are both provided with for the fuel gas injection pipe to intake port injection combustion gas, cylinder cap in each air intake duct
Mounting hole is provided on body, fuel gas injection pipe is fixed on mounting hole, and the jet port of fuel gas injection pipe is located at corresponding air inlet
The end in road.Above-mentioned multi-point injection natural gas engine is by will arrange fuel gas injection pipe, and combustion gas in each air intake duct
Injection pipe on cylinder body by arranging mounting hole so that the deep enough end to air intake duct of jet port energy of fuel gas injection pipe, into
And the combustion gas that the jet port for the air and fuel gas injection pipe for entering air intake duct sprays can be in end (namely the inlet valve of air intake duct
Place) it is mixed, and then the gaseous mixture that can shorten natural gas and air enters the time of cylinder, so that combustion gas can be promoted
Into the speed of cylinder, the transient response of engine can be also promoted；And it can be each for more engine intake valves
Fuel gas injection pipe is arranged in the end of air intake duct, and then ensure that the consistency of the air inflow of each air intake duct.
Description of the drawings
Fig. 1 is the internal structure signal of the cylinder block for the multi-point injection natural gas engine that the utility model embodiment provides
Figure；
Fig. 2 is the fit structure schematic diagram of fuel gas injection pipe and mounting hole that the utility model embodiment provides；
Fig. 3 is the structural schematic diagram that fixed plate is arranged in the fuel gas injection pipe that the utility model embodiment provides；
Fig. 4 is the structural schematic diagram that fixed plate is not arranged for the fuel gas injection pipe that the utility model embodiment provides；
Fig. 5 is the attachment structure schematic diagram of Gas Pipe and fuel gas injection pipe that the utility model embodiment provides；
Fig. 6 is that the fuel gas injection pipe that the utility model embodiment provides gos deep into the structural schematic diagram of the end of air intake duct；
Fig. 7 is arrangement schematic diagram of the Gas Pipe that provides of the utility model embodiment on cylinder；
Fig. 8 is the fixed structure schematic diagram of Gas Pipe and beamline apertures that the utility model embodiment provides；
Fig. 9 is the arrangement schematic diagram of gas rail and Gas Pipe that the utility model embodiment provides；
Figure 10 is the positional structure schematic diagram of the Gas Pipe and gas nozzle on the gas rail that the utility model embodiment provides；
Figure 11 is the operation principle structural schematic diagram for the multi-point injection natural gas engine that the utility model embodiment provides.
In figure 1 above-Figure 11,
Cylinder body 1, air intake duct 2, fuel gas injection pipe 3, mounting hole 4, spray-hole 5, gas nozzle 6, Gas Pipe 7, gas rail 8,
Beamline apertures 9, bunch block 10, fixed plate 11, gasket 12, inlet valve 13, air inlet pipe 14.
Specific implementation mode
The core of the utility model is to provide a kind of multi-point injection natural gas engine, is sent out to avoid multi-point injection natural gas
The problem of motivation air inlet low-response, while ensureing the consistency of each inlet valve air inlet of more engine intake valves.
In order to make those skilled in the art more fully understand technical solution provided by the utility model, below in conjunction with attached
The utility model is described in further detail with specific embodiment for figure.
As shown in Fig. 1-Figure 10, a kind of multi-point injection natural gas engine that the utility model embodiment provides, including cylinder
Lid 1 and the multiple air intake ducts 2 being arranged on cylinder body 1 are both provided in each air intake duct 2 and are fired for being sprayed to air intake duct 2
The fuel gas injection pipe 3 of gas is provided with mounting hole 4 on cylinder body 1, and fuel gas injection pipe 3 is fixed on mounting hole 4, and fuel gas injection
The jet port of pipe 3 is located at the end of corresponding air intake duct 2.
Above-mentioned multi-point injection natural gas engine is by will arrange fuel gas injection pipe 3, and combustion gas in each air intake duct 2
Injection pipe 3 is by arranging mounting hole 4 on cylinder body 1 so that the jet port of fuel gas injection pipe 3 can the deep enough end to air intake duct 2
End, so enter air intake duct air and fuel gas injection pipe 3 jet port spray combustion gas can air intake duct 2 end (
I.e. at inlet valve 13) gaseous mixture that is mixed, and then can shorten natural gas and air enters time of cylinder, to energy
The speed that combustion gas enters cylinder is enough promoted, the transient response of engine can be also promoted；And it is directed to more engine intake valves
Fuel gas injection pipe can be arranged in the end of each air intake duct, and then ensure that the consistency of the air inflow of each air intake duct.
In some specific embodiments, the specific constructive form of above-mentioned jet port may include multiple spray-holes 5, and
Spray-hole 5 is evenly arranged on fuel gas injection pipe 3.By the form that jet port is arranged to multiple spray-holes so that combustion gas with
The mixing of air is more uniform, and then can promote the performance of engine.What needs to be explained here is that the above-mentioned side being evenly arranged
Formula is only the preferable examples of the utility model embodiment, can also be the direction cloth flowed according to cylinder cap air intake duct air inlet
It is set to other injection directions and the spray-hole of injection density.
In some more particular embodiments, in order to ensure that sufficient combustion gas can be entered in each air intake duct, each
The end of air intake duct 2 is both provided with multiple fuel gas injection pipes 3.Of course, it should be understood that the above-mentioned multiple fuel gas injection pipes of setting
Mode be only the utility model embodiment preferable examples, can also according to actual demand select be arranged to it is each into
The mode of one fuel gas injection pipe of setting in air flue.
What needs to be explained here is that the part that fuel gas injection pipe 3 stretches out 4 outside of mounting hole of cylinder body 1 can be designed to
Polymorphic structure can be realized in turn direct to be connected with corresponding gas source；It can also be connected to corresponding combustion by Gas Pipe 7
Gas air source.
And the air inflow of the combustion gas in each air intake duct in order to realize more engine intake valves is accurately controlled, each
The gas nozzle 6 for controlling injection flow is respectively connected on fuel gas injection pipe 3.And in order to which the combustion gas of fuel gas injection pipe is concentrated
Supply and control, each fuel gas injection pipe 3 can be integrated on a gas rail 8 by Gas Pipe 7, and gas nozzle 6 can
It can also be arranged in Gas Pipe 7 on gas rail 8 with setting.Preferably gas nozzle 6 is arranged on gas rail 8 for the utility model,
On the one hand the traffic requirement to gas nozzle can be reduced, another aspect engine electric-controlled unit can accurately control each combustion gas
The fuel gas injection amount of nozzle, and then the gas quantity that each inlet valve enters is controlled, more accurately control is realized, so that often
The consistency of the air inflow of combustion gas in a air intake duct more easily ensures.What needs to be explained here is that the setting of gas nozzle 6
Can be that corresponding each fuel gas injection pipe 3 is arranged in a one-to-one correspondence, namely each fuel gas injection pipe 3 is respectively connected with corresponding combustion
Gas jets；And when the end of each air intake duct is both provided with multiple fuel gas injection pipes 3, it is all in corresponding each air intake duct
Fuel gas injection pipe 3 can also be connected to by Gas Pipe 7 on the same gas nozzle 6, because facilitating the cloth of whole system in this way
It sets, for example is both provided with 2 fuel gas injection pipes in each air intake duct, the two fuel gas injections Guan Lian in some corresponding air intake duct
It is connected on the same gas nozzle.
What needs to be explained here is that in general, air is to enter cylinder by air inlet pipe 14 by the air inlet of air throttle
In air intake duct 2 on lid.Fuel gas injection pipe 3 is connected to by Gas Pipe 7 on a gas rail 8, and gas nozzle 6 is mounted on gas
On rail 8.In the course of work, combustion gas initially enters in gas rail 8, and the combustion gas in gas rail 8 is after gas nozzle 6 carries out flow control
It is delivered in fuel gas injection pipe 3 into Gas Pipe 7, then by Gas Pipe 7, finally by the jet port of fuel gas injection pipe 3 in air intake duct
End is sufficiently mixed (i.e. at inlet valve 13) with air, and mixed gaseous mixture enters cylinder by the air inlet on cylinder body
Inside carry out burning work.
In some more particular embodiments, above-mentioned Gas Pipe 7 can be to be threadedly coupled with fuel gas injection pipe 3, also may be used
To be other common pipe connection types of those skilled in the art, for example connected in a manner of clip hose.Only
The utility model embodiment is preferably by the way of above-mentioned threaded connection, because the mode being threadedly coupled is dismantled more just
Just, angular adjustment is more convenient.
In addition, above-mentioned fuel gas injection pipe 3 can be interference fit with mounting hole 4, those skilled in the art can also be selected
Common other are fixedly connected with mode and are attached, for example, the non-intrusive end of fuel gas injection pipe 3 is provided with fixed plate 11, it is fixed
Plate 11 is bolted on cylinder body 1.What needs to be explained here is that the non-intrusive end of fuel gas injection pipe refer to not deeply into
One end inside air flue.In addition, in order to ensure the leakproofness coordinated between fixed plate and cylinder body, in general, fixed plate 11
It is provided with gasket 12 in the fit clearance of cylinder body 1.Of course, it should be understood that the arrangement of above-mentioned gasket is only
It is the preferable examples of the utility model embodiment, can also be other common sealing means of those skilled in the art, than
The mode of such as filling with sealant is sealed.
In general, in order to facilitate the arrangement of Gas Pipe 7, the bunch for arranging Gas Pipe 7 is provided on cylinder body 1
Hole 9 passes through beamline apertures by Gas Pipe, the arrangement of Gas Pipe can not only be made more neat, and play one to Gas Pipe 7
Fixed firm effect.In addition, in order to further such that Gas Pipe is fixed in beamline apertures more firm, Gas Pipe can pass through beam
Line block 10 is fixed in beamline apertures 9.
It is natural with reference to multi-point injection in order to which those skilled in the art are better understood from the technical solution of the utility model
The course of work of gas engine illustrates：
As shown in figure 11, air enters by the air throttle of engine in inlet manifold, then enters air inlet by inlet manifold
Manifold, inlet manifold deliver the air in the cylinder cap air intake duct on cylinder body；Combustion gas carries out flow control by gas nozzle
Enter Gas Pipe afterwards, then fuel gas injection pipe is delivered to by Gas Pipe, since the jet port of fuel gas injection pipe is deeply to cylinder cap air inlet
The end in road, therefore air in air intake duct and combustion gas can be sufficiently mixed the air inlet through cylinder in air intake duct and enter cylinder
It works.
Multi-point injection natural gas engine provided by the utility model is described in detail above.It needs to illustrate
That each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts between the embodiments can be referred to each other.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that article or equipment including a series of elements include not only those elements, but also
Including other elements that are not explicitly listed, or further include for this article or the intrinsic element of equipment.Do not having
In the case of more limitations, the element that is limited by sentence "including a ...", it is not excluded that in the article for including above-mentioned element
Or there is also other identical elements in equipment.
Specific case used herein is expounded the principles of the present invention and embodiment, above example
Explanation be merely used to help understand the method and its core concept of the utility model.It should be pointed out that for the art
For those of ordinary skill, without departing from the principle of this utility model, several change can also be carried out to the utility model
Into and modification, modifications and modifications also fall within the protection scope of the claims of the utility model.
Claims (10)
1. a kind of multi-point injection natural gas engine includes the multiple air inlets of cylinder body (1) and setting on the cylinder body (1)
Road (2), which is characterized in that the combustion gas for spraying combustion gas to the air intake duct (2) is both provided in each air intake duct (2)
Injection pipe (3) is provided with mounting hole (4) on the cylinder body (1), and the fuel gas injection pipe (3) is fixed on the mounting hole (4)
On, and the jet port of the fuel gas injection pipe (3) is located at the end of the corresponding air intake duct (2).
2. multi-point injection natural gas engine as described in claim 1, which is characterized in that the jet port includes multiple injections
Hole (5), and the spray-hole (5) is evenly arranged on the fuel gas injection pipe (3).
3. multi-point injection natural gas engine as described in claim 1, which is characterized in that the end of each air intake duct (2)
End is both provided with multiple fuel gas injection pipes (3).
4. multi-point injection natural gas engine as described in claim 1, which is characterized in that each fuel gas injection pipe (3)
On be respectively connected with gas nozzle (6) for controlling injection flow.
5. multi-point injection natural gas engine as claimed in claim 4, which is characterized in that the fuel gas injection pipe (3) is logical
It crosses Gas Pipe (7) to be integrated on a gas rail (8), and the gas nozzle (6) is arranged on the gas rail (8).
6. multi-point injection natural gas engine as claimed in claim 5, which is characterized in that the Gas Pipe (7) and the combustion
Gas jet pipe (3) is to be threadedly coupled.
7. multi-point injection natural gas engine as claimed in claim 5, which is characterized in that the fuel gas injection pipe (3) and institute
It is interference fit to state mounting hole (4).
8. multi-point injection natural gas engine as claimed in claim 5, which is characterized in that be provided on the cylinder body (1)
Beamline apertures (9) for arranging the Gas Pipe (7), the Gas Pipe (7) are fixed on the beamline apertures by bunch block (10)
(9) on.
9. multi-point injection natural gas engine as claimed in claim 5, which is characterized in that the fuel gas injection pipe (3) it is non-
Insertion end is provided with fixed plate (11), and the fixed plate (11) is bolted on the cylinder body (1).
10. multi-point injection natural gas engine as claimed in claim 9, which is characterized in that the fixed plate (11) with it is described
Gasket (12) is provided in the fit clearance of cylinder body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721837885.6U CN208057260U (en) | 2017-12-25 | 2017-12-25 | A kind of multi-point injection natural gas engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721837885.6U CN208057260U (en) | 2017-12-25 | 2017-12-25 | A kind of multi-point injection natural gas engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208057260U true CN208057260U (en) | 2018-11-06 |
Family
ID=63997122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721837885.6U Active CN208057260U (en) | 2017-12-25 | 2017-12-25 | A kind of multi-point injection natural gas engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208057260U (en) |
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2017
- 2017-12-25 CN CN201721837885.6U patent/CN208057260U/en active Active
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