CN104832319B - A kind of gas/dual fuel engine combustion gas echelon injection apparatus - Google Patents
A kind of gas/dual fuel engine combustion gas echelon injection apparatus Download PDFInfo
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- CN104832319B CN104832319B CN201510224027.3A CN201510224027A CN104832319B CN 104832319 B CN104832319 B CN 104832319B CN 201510224027 A CN201510224027 A CN 201510224027A CN 104832319 B CN104832319 B CN 104832319B
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- venthole
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- upper semisection
- semisection
- 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 present invention is to provide a kind of gas/dual fuel engine combustion gas echelon injection apparatus, including cylinder head and cylinder main body, it is provided with manifold channels in described cylinder head, big flow gas nozzle is also equipped with manifold channels, big flow gas nozzle includes nozzle upper semisection and the nozzle lower semisection being connected with nozzle upper semisection, nozzle lower semisection is bend pipe, and the end of nozzle lower semisection is provided with lower semisection venthole, the outer surface of nozzle upper semisection is provided with upper semisection venthole, and the arrangement mode of upper semisection venthole is：The venthole group of at least two row is arranged along on the length direction of upper semisection nozzle, the upper semisection venthole of at least four upper semisection ventholes of each column venthole group and each column is evenly arranged along the circumference of upper semisection nozzle, and the aperture of each upper semisection venthole is less than the aperture of lower semisection venthole.The present invention can meet combustion gas and mix and be layered requirement with air, optimize engine combustion process, improve its economy and discharge performance.
Description
Technical field
The present invention relates to a kind of injection apparatus, more particularly, to a kind of gas/dual fuel engine combustion gas echelon injection apparatus,
Belong to technical field of engines.
Background technology
Increasingly serious with energy crisis and environmental pollution, all research and develop various energy-conserving and emission-cutting technology handss positive both at home and abroad
Section.Natural gas is high with its calorific value, combustion cleaning, and rich reserves become the alternative energy source of a new generation.Wherein lean burn is due to combustion
Burn temperature low, can effectively reduce NOx emission, become important emission-reduction technology means.But, with lean out,
The cyclical fluctuation aggravation of electromotor, or even part burning occurs when electromotor operates near lean flammability limit or catches fire existing
As in emission, HC and CO substantially increases, and cyclical fluctuation becomes an important obstruction of impact lean flammability limit, therefore, rationally
Tissue air inlet, combustion process, improve burning quality be in the weight give full play to lean burn natural gas engine energy-saving and emission-reduction ability it
Weight.
At present both at home and abroad in advanced electromotor, for more than lean burn natural gas engine fuel supply mode using automatically controlled
Multi-point injection mode, because natural gas density is less than air, air intake duct natural gas injection easily causes a large amount of gas accumulations and is entering
In air flue, lead to air inlet insufficient, charge stratification phenomenon is inconspicuous.Sparking mode for gas/dual fuel engine
Difference, it should take different air inlets, combustion process method for organizing, forms the concentration of natural gas layering being easy to burn.Publication number
The patent of CN101985906B is related to a kind of fuel injection configuration of natural gas engine, and this mechanism is by installing gas nozzle
In the position being more nearly engine intake valve, the gap that combustion gas runs through between inlet valve and valve seat is directly injected in cylinder,
Using the kinergety of fuel gas injection, improve the tubulence energy in cylinder, and then improve burning.But this fuel gas injection structure is easy
Lead to combustion gas and the randomness of air concentration distribution in cylinder to increase, when electromotor is operated under some specific operations, particularly exist
In cylinder under Lean Burn Operating, Concentraton gradient is excessive, leads to combustion stability and NOx emission performance not ideal enough.
Content of the invention
The invention aims to solving the problems, such as prior art and providing a kind of gas/dual fuel engine combustion
Gas echelon injection apparatus.
The object of the present invention is achieved like this：Including cylinder head and cylinder main body, described cylinder head is provided with manifold
Pipeline, described manifold channels are also equipped with big flow gas nozzle, described big flow gas nozzle include upper semisection nozzle and
The lower semisection nozzle being connected with upper semisection nozzle, described lower semisection nozzle is bend pipe, and the end of lower semisection nozzle is provided with down
Half section of venthole, combustion gas is sprayed onto in cylinder main body through lower semisection venthole, and the outer surface of described upper semisection nozzle is provided with upper half
Section venthole, the arrangement of described upper semisection venthole is：At least two row are arranged along on the length direction of upper semisection nozzle
Venthole group, the upper semisection venthole of at least four upper semisection ventholes of each column venthole group and each column sprays along upper semisection
The circumference of mouth is evenly arranged, and the aperture of each upper semisection venthole is less than the aperture of lower semisection venthole, and combustion gas is through upper semisection
Venthole is sprayed onto in manifold channels.
Present invention additionally comprises such some architectural features：
1. the diameter of lower semisection nozzle described in is less than the diameter of upper semisection nozzle.
2. the angle between the axis of the axis of upper semisection venthole and upper semisection nozzle described in is 90 ° or 45 ° or 135 °.
3. described in, the aperture of each upper semisection venthole of each column venthole group is unequal.
4. the upper semisection venthole of the same apertures of each column venthole group is not on the same line.
Compared with prior art, the invention has the beneficial effects as follows：The present invention enables gas premixing and closes and echelon air inlet, changes
In kind cylinder, combustion gas and the mixture strength of air are layered, and then improve engine combustion quality, the lean flammability limit of extension electromotor,
Reduce the NOx emission of electromotor simultaneously.The echelon air inlet of two parts gaseous mixture can be realized by this air inlet method for organizing, lead to
Crossing adjustment two parts gaseous mixture each concentration, just can making to form required mixture strength layering in cylinder it is ensured that starting function
Enough reliably ignition.The drainage of lower semisection nozzle end outlet, makes natural gas not collide inlet valve and inlet valve
In the case of valve seat, rapidly enter cylinder interior, do not lose the kinergety of natural gas, accelerate mixing velocity.Namely the present invention can
To realize the concentration stratification of demand, optimize the combustion process of engine interior, improve its economy and discharge performance.
Brief description
Fig. 1 is the general structure schematic diagram of the present invention；
Fig. 2 is the structural representation of the injection apparatus of the present invention；
Fig. 3 (A) and Fig. 3 (B) is the axis schematic diagram of the upper semisection venthole of the present invention；(it is the feelings of 45 ° and 135 ° respectively
Condition)；
Fig. 4 is mixed process schematic diagram in manifold channels (sluggish air inlet)；
Fig. 5 is the arrangement schematic diagram one (along upper semisection nozzle circumference) of upper semisection venthole；
Fig. 6 is the arrangement schematic diagram two (along the length direction of upper semisection nozzle) of upper semisection venthole；
Fig. 7 is mixed gas concentration distribution schematic diagram (when having spark plug) in cylinder main body.
Specific embodiment
With specific embodiment, the present invention is described in further detail below in conjunction with the accompanying drawings.
Case study on implementation one：In conjunction with Fig. 1 to Fig. 7, the present invention includes cylinder head 8 and cylinder main body 6, and described cylinder head 8 sets
It is equipped with manifold channels 14, described manifold channels 14 are also equipped with big flow gas nozzle, described big flow gas nozzle includes
Upper semisection nozzle 1 and the lower semisection nozzle 2 being connected with upper semisection nozzle 1, described lower semisection nozzle 2 is bend pipe, and lower semisection spray
The end of mouth 2 is provided with lower semisection venthole 15, and combustion gas is sprayed onto in cylinder main body 6 through lower semisection venthole 15, forms combustion gas arteries and veins
Punching 10, the outer surface of described upper semisection nozzle 1 is provided with upper semisection venthole 3, the arrangement of described upper semisection venthole 3
It is：The venthole group of at least two row is arranged along on the length direction of upper semisection nozzle, in each column venthole group at least four
The upper semisection venthole 3 of half section of venthole 3 and each column is evenly arranged along the circumference of upper semisection nozzle 1, and each upper semisection goes out
The aperture of pore 3 is less than the aperture of lower semisection venthole 15, and combustion gas is sprayed onto in manifold channels 14 through upper semisection venthole 3, is formed
Multiple gas impulses 10.
In conjunction with Fig. 1, the technical scheme is that and be achieved in that, gas/dual fuel engine combustion gas echelon injection dress
Be set to a big flow gas nozzle, be made up of upper semisection nozzle 1 and lower semisection nozzle 2, and upper semisection nozzle 1 be thickness be 1-
2 millimeters of hollow circular tube, upper semisection nozzle 1 is connected with gas solenoid valve by connecting line, and by bolt, gas is electric
Magnet valve and coupling part snugly fit in inlet manifold, upper semisection nozzle 1 tube wall are machined with and inlet manifold inner chamber and entering
Air flue together with upper semisection venthole 3.
In conjunction with Fig. 2, lower semisection nozzle 2 is the hollow circular bend pipe of thickness 1-2 millimeter, and lower semisection nozzle 2 end is near entering
Valve seat insert, only has a natural gas spray orifice in end, i.e. lower semisection venthole 15, and lower semisection venthole 15 with diameter greater than
The diameter of upper semisection upper semisection venthole 3.In order to realize connection and the sealing of two sections of jet pipes, two sections are sprayed by the mode using welding
Mouth is fixed together.
2 guide functions of lower semisection nozzle, lower semisection nozzle 2 end is near inlet valve valve seat 5, tail end centrage and air inlet
Door 4 centrages are for being not parallel to each other, mutually disjoint space line, will not produce movement interference with inlet valve valve rod.Lower semisection sprays
Mouth 2 distal center line and inlet valve 4 centrage angulation, according to the valve shape of working engine, valve seat insert position, protect
The combustion gas that card sprays along lower semisection nozzle 2 will not be collided with inlet valve 4, inlet valve valve seat 5, prevents high-pressure gas pulse 10 from colliding
After reflection, because natural gas density is less than air, formed at inlet valve and pile up, reduce charging efficiency.From lower semisection nozzle 2 end
The natural gas pulse 10 that end sprays runs through the annular gap between inlet valve and valve seating, compared to from upper semisection venthole
The gas impulse 9 of 3 ejections, can be premixed with air in cylinder earlier, and then realizes the mixture strength layering in cylinder, real
Existing echelon injection, realizes the further action of piston 7.
Case study on implementation two：Based on above-described embodiment, the present invention can also be：The diameter of described lower semisection nozzle 2 is less than upper
The diameter of half section of nozzle 1, namely lower semisection nozzle 2 diameter is less than upper semisection nozzle 1.
Case study on implementation three：Based on above-described embodiment and with reference to Fig. 3 (A) and Fig. 3 (B), the present invention can also be：Described upper half
Angle between the axis of section venthole 3 and the axis of upper semisection nozzle 1 is 90 ° or 45 ° or 135 °.Upper semisection upper semisection is given vent to anger
Hole 3 is diameter 1-3 millimeter through hole, connects upper semisection nozzle 1 inner chamber and air intake duct, the axis of upper semisection upper semisection venthole 3 with
At an angle, current design has three kinds to air intake duct air direction of flow, (1) upper semisection upper semisection venthole 3 axis with
Upper semisection nozzle 1 axis is in 45 °, and the gas impulse 9 of ejection is consistent with air inlet direction of flow；(2) upper semisection upper semisection venthole 3
Axis is in 135 ° with upper semisection nozzle 1 axis, and the gas impulse 9 of ejection is contrary with air inlet direction of flow；(3) upper semisection upper semisection
The axis of venthole 3 is in 90 ° with the axis of upper semisection nozzle 1.
In conjunction with Fig. 4, it is in certain angle that the pulsewidth of gas impulse 9 that upper semisection upper semisection venthole 3 sprays to flow 12 with air inlet
Degree, such structure ensure that the natural gas spraying from venthole 3 is sufficiently mixed with incoming air and becomes mixed flow 13, can have
Effect slows down air movement speed in air intake duct.
Case study on implementation four：Based on above-described embodiment and with reference to Fig. 5 and Fig. 6, the present invention can also be：Described each column venthole
The aperture of each upper semisection venthole 3 of group is unequal.The upper semisection venthole 3 of the same apertures of each column venthole group is not same
On one straight line.
In conjunction with Fig. 5, upper semisection venthole 3 in the distribution situation of upper semisection nozzle 1 radial section is：Radial section uniformly divides
6 fumaroles of cloth, jet axially bored line is in mutually 60 degree of angles, and upper semisection venthole 3 diameter is incomplete same, the different fumarole of diameter
Arranged for interval is it is therefore an objective to make the natural gas pulsewidth jet length spraying by upper semisection venthole 3 different, and then reaches in air inlet
In road, natural gas and air more fully premix.
In conjunction with Fig. 6, distribution situation in upper semisection nozzle 1 axial direction for the upper semisection venthole 3 is：Jet in each radial section
Pore size distribution is in 30 degree of angles.The purpose of so design is so that the hole in each radial direction interface is not appeared in same axial cross section, subtracts
Delayed gaseous mixture movement velocity also prevent simultaneously from upper semisection venthole 3 spray high-pressure gas be likely to occur hit wall phenomenon.
Jet number of perforations can be adjusted according to the needs that electromotor runs.
What accompanying drawing 7 was given is mixed gas concentration distribution schematic diagram in cylinder main body, namely is given vent to anger by adjusting upper semisection
The size in hole 3 and quantity, make the present invention formed combustion gas upper dense under dilute, and spark plug 11 is in the denseer region of combustion gas.
Injection apparatus include a big flow natural gas nozzle being arranged on electromotor every cylinder manifold, described big flow spray
Mouth is made up of upper semisection nozzle 1 and lower semisection nozzle 2 two parts, and upper semisection nozzle 1 is connected with fuel gas injection valve and fixes air inlet
On manifold, lower semisection nozzle 2 end is near inlet valve valve seat.A number of little upper semisection is equipped with upper semisection nozzle 1 tube wall
Venthole 3, fumarole is evenly distributed in the radial section of upper semisection nozzle 1, and the outgassing direction of upper semisection venthole 3 with enter
Trachea air inlet direction of flow is angled, and in radial section, upper semisection venthole 3 diameter is incomplete same, and the different spray of diameter
Pore is spaced apart, and in the no longer same axial cross section in upper semisection venthole 3 position in different radial sections, this structure can be effective
Wall problem is hit in the combustion gas that alleviation combustion gas produces in high supply pressure.Lower semisection nozzle 2 is that a diameter is less than upper semisection nozzle 2
Bend pipe, and be connected with upper semisection nozzle 1, lower semisection nozzle 2 port of export has the hole greater diameter than upper semisection venthole 3, lower half
Section nozzle 2 centrage is two space lines being not parallel to each other or intersecting with inlet valve 4 centrage, and with the valve rod of inlet valve not
Produce movement interference.The air inlet method for organizing of gas of the present invention/dual fuel engine combustion gas echelon injection apparatus is by upper half
The combustion gas of section nozzle 1 injection is drawn with the shock of air of entrance inlet manifold, premix hysteresis, and lower semisection nozzle 2
Stream is sprayed with quick, realizes combustion gas shunting and echelon air inlet, by adjust upper semisection nozzle 1 upper semisection venthole 3 diameter and
Quantity, lower semisection nozzle 2 outlet aperture and fuel gas injection timing, meet gas/dual fuel engine combustion gas mix with air and
Layering requires, and optimizes engine combustion process, improves its economy and discharge performance.
Big flow nozzle is arranged in inlet manifold, is made up of upper semisection nozzle 1 and lower semisection nozzle 2, upper semisection nozzle 1
After connecting gas spraying air valve, snugly fit in inlet manifold, upper semisection nozzle 1 tube wall is equipped with some upper semisection ventholes
3.Lower semisection nozzle 2 only one of which venthole, venthole is located proximate to inlet valve valve seat.
Upper semisection nozzle 1 is a hollow circular tube, is connected with solenoid valve by connecting line, and lower semisection nozzle 2 is
One structure bend pipe similar with upper semisection nozzle 1, and weld together it is ensured that sealing, lower semisection with upper semisection nozzle 1
Nozzle 2 diameter is less than upper semisection nozzle 1.
Upper semisection venthole 3 is to connect the internal through-hole structure with air intake duct of big flow nozzle chambers, is distributed in upper semisection spray
On mouth 1 tube wall, with upper semisection nozzle 1 axis at an angle, the export center of upper semisection venthole 3 is all distributed in perpendicular to upper
In the radial section of half section of nozzle 1 axis, in radial section, the diameter of upper semisection venthole 3 is incomplete same, and diameter is different
Hole spaced apart.In each section, jet pore size distribution rotates to an angle, that is, the hole in each radial direction interface do not appear in same
In axial cross section.
Lower semisection nozzle 2 centrage and inlet valve 4 centrage are not parallel to each other for two, mutually disjoint space line, really
The valve rod protecting lower semisection nozzle 2 with inlet valve 4 does not produce movement interference.
By upper semisection venthole 3 spray natural gas, combustion gas in air intake duct with air pre-mixing, simultaneously reduce air flue in
Air movement speed, forms sluggish air inlet.And pass through lower semisection nozzle 2 end and spray natural gas, combustion gas is quickly through inlet valve 4
Annular gap and valve seating 5 between enters cylinder, the quick premixing with air in cylinder.
The concentration difference that echelon air inlet is formed, by adjusting diameter, the number of upper semisection venthole 3 by control can be
System adjustment jet timing, jet pulsewidth are realized
The gas of the present invention/dual fuel engine fuel gas ejecting device composition includes：One big flow natural gas nozzle, by
Natural gas upper semisection nozzle 1, natural gas lower semisection nozzle 2 are constituted.Upper semisection nozzle 1 is fixed on air inlet discrimination with snifting valve after being connected
Guan Shang, lower semisection nozzle 2 end is near inlet valve valve seat 5.Upper semisection nozzle 1 is equipped with some upper semisection ventholes 3, and upper semisection goes out
Pore 3 arrangement is with air inlet direction of flow at an angle.Lower semisection nozzle 2 is the bend pipe that a diameter is less than upper semisection nozzle 2, and
It is connected with upper semisection nozzle 1, lower semisection nozzle 2 port of export has the hole greater diameter than upper semisection venthole 3, in lower semisection nozzle
Heart line is not parallel to each other, mutually disjoints with inlet valve 4 centrage, does not affect the normally-open of valve 4 and closes.
Gas/dual fuel engine air inlet method for organizing is：
In induction stroke, upper semisection venthole 3 with air inlet direction of flow at an angle, jet pulse 9 and incoming air
Collide, slow down air movement speed in air intake duct, realize sluggish air inlet, combustion gas and air premix laggard in air intake duct
Enter cylinder.And another part natural gas passes through lower semisection nozzle 2 end outlet, quickly through between inlet valve 4 and valve seating 5
Gap enters cylinder, is premixed with air in cylinder.By combustion gas and the sky entering inlet manifold of upper semisection nozzle 1 injection
The shock of gas, premix hysteresis, and lower semisection nozzle 2 drain and quick injection, realize combustion gas shunting and echelon air inlet.
The export center of upper semisection venthole 3 is all distributed in the radial section of upper semisection nozzle 1 axis, radially
In section, the diameter of upper semisection venthole 3 is different, and the different fumarole of diameter is spaced apart.Jet pore size distribution rotation in each section
Certain angle, makes the hole in each radial direction interface not appear in same axial cross section.
Catch fire required different gaseous mixture concentration stratification demands for gas/natural gas engine can be by adjusting jet
Apparatus structure, that is, upper semisection venthole 3 diameter, number, lower semisection nozzle 2 outlet diameter are it is also possible to pass through adjustment control system
Jet timing, jet pulsewidth realize.
Claims (9)
1. a kind of gas/dual fuel engine combustion gas echelon injection apparatus, including cylinder head and cylinder main body, in described cylinder head
Be provided with manifold channels it is characterised in that：Big flow gas nozzle, described big flow combustion gas are also equipped with described manifold channels
Nozzle includes upper semisection nozzle and the lower semisection nozzle being connected with upper semisection nozzle, and described lower semisection nozzle is bend pipe, and lower half
The end of section nozzle is provided with lower semisection venthole, and combustion gas is sprayed onto in cylinder main body through lower semisection venthole, described upper semisection spray
The outer surface of mouth is provided with upper semisection venthole, and the arrangement of described upper semisection venthole is：Length along upper semisection nozzle
Degree side sets up the venthole group of at least two row, the upper half of at least four upper semisection ventholes of each column venthole group and each column
Section venthole is evenly arranged along the circumference of upper semisection nozzle, and the aperture of each upper semisection venthole is less than lower semisection venthole
Aperture, combustion gas is sprayed onto in manifold channels through upper semisection venthole.
2. a kind of gas according to claim 1/dual fuel engine combustion gas echelon injection apparatus it is characterised in that：Institute
The diameter stating lower semisection nozzle is less than the diameter of upper semisection nozzle.
3. a kind of gas according to claim 1 and 2/dual fuel engine combustion gas echelon injection apparatus it is characterised in that：
Angle between the axis of described upper semisection venthole and the axis of upper semisection nozzle is 90 ° or 45 ° or 135 °.
4. a kind of gas according to claim 1 and 2/dual fuel engine combustion gas echelon injection apparatus it is characterised in that：
The aperture of each upper semisection venthole of described each column venthole group is unequal.
5. a kind of gas according to claim 3/dual fuel engine combustion gas echelon injection apparatus it is characterised in that：Institute
The aperture stating each upper semisection venthole of each column venthole group is unequal.
6. a kind of gas according to claim 1 and 2/dual fuel engine combustion gas echelon injection apparatus it is characterised in that：
The upper semisection venthole of the same apertures of each column venthole group is not on the same line.
7. a kind of gas according to claim 3/dual fuel engine combustion gas echelon injection apparatus it is characterised in that：Often
List the upper semisection venthole of same apertures of pore group not on the same line.
8. a kind of gas according to claim 4/dual fuel engine combustion gas echelon injection apparatus it is characterised in that：Often
List the upper semisection venthole of same apertures of pore group not on the same line.
9. a kind of gas according to claim 5/dual fuel engine combustion gas echelon injection apparatus it is characterised in that：Often
List the upper semisection venthole of same apertures of pore group not on the same line.
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| CN201510224027.3A CN104832319B (en) | 2015-05-05 | 2015-05-05 | A kind of gas/dual fuel engine combustion gas echelon injection apparatus |
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| CN201510224027.3A CN104832319B (en) | 2015-05-05 | 2015-05-05 | A kind of gas/dual fuel engine combustion gas echelon injection apparatus |
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| CN104832319B true CN104832319B (en) | 2017-03-01 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105179111A (en) * | 2015-09-09 | 2015-12-23 | 哈尔滨工程大学 | Gas/dual-fuel engine intake manifold gas injection device |
| CN107061061A (en) * | 2017-06-28 | 2017-08-18 | 哈尔滨工程大学 | A kind of integrated form of mixed admission intersects annular groove gaseous fuel jet mixing device |
| CN109386403B (en) * | 2018-09-29 | 2021-10-26 | 哈尔滨工程大学 | Double-valve type gas injection device for gas and dual-fuel engine with double gas inlet channels and control method of double-valve type gas injection device |
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| CN2816387Y (en) * | 2005-05-19 | 2006-09-13 | 潍坊潍柴培新气体发动机有限公司 | Gas-supplying device for gas engine |
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| CN204729189U (en) * | 2015-05-05 | 2015-10-28 | 哈尔滨工程大学 | A kind of gas/duel fuel engine combustion gas echelon injection apparatus |
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| JP3967977B2 (en) * | 2001-10-18 | 2007-08-29 | トヨタ自動車株式会社 | Fuel supply device for internal combustion engine |
| JP4675191B2 (en) * | 2005-09-05 | 2011-04-20 | 日野自動車株式会社 | Gas engine |
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| CN2816387Y (en) * | 2005-05-19 | 2006-09-13 | 潍坊潍柴培新气体发动机有限公司 | Gas-supplying device for gas engine |
| CN2908826Y (en) * | 2006-04-18 | 2007-06-06 | 汤洪辉 | Gas intake device of gas IC engine |
| CN1932258A (en) * | 2006-10-20 | 2007-03-21 | 镇江恒驰科技有限公司 | Internal combustion engine hydrogen fuel injection method and apparatus |
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| CN204729189U (en) * | 2015-05-05 | 2015-10-28 | 哈尔滨工程大学 | A kind of gas/duel fuel engine combustion gas echelon injection apparatus |
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| CN104832319A (en) | 2015-08-12 |
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