CN207406425U - A kind of multi-cylinder diesel engine air intake duct - Google Patents
A kind of multi-cylinder diesel engine air intake duct Download PDFInfo
- Publication number
- CN207406425U CN207406425U CN201721424351.0U CN201721424351U CN207406425U CN 207406425 U CN207406425 U CN 207406425U CN 201721424351 U CN201721424351 U CN 201721424351U CN 207406425 U CN207406425 U CN 207406425U
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- Prior art keywords
- air intake
- intake duct
- cylinder
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- long
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- 230000007704 transition Effects 0.000 claims description 6
- 238000005304 joining Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 11
- 238000001816 cooling Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model discloses a kind of multi-cylinder diesel engine air intake ducts, including inlet manifold, the inlet manifold is equipped with multigroup long air intake duct consistent with cylinder of diesel engine quantity and arranged in pairs and short air intake duct, the inlet port of long air intake duct and short air intake duct on the two neighboring cylinder combines together across the cylinder air intake duct to be formed and connect the long air intake duct and short air intake duct jointly with the inlet manifold, and the outlet port of long air intake duct and short air intake duct on the same cylinder is respectively along cylinder bending extension so that the jet direction of the two is tangent with cylinder.The utility model is simple in structure, intensity is high, air-flow is unobstructed, can realize predetermined swirl ratio using the guiding function of cylinder wall to greatest extent, anufacturability is good, and production cost is low.
Description
Technical field
The utility model is related to engine charge technical field, more specifically, it relates to a kind of multi-cylinder diesel engine air inlet
Road.
Background technology
Now talk about publicly known, air inlet path for diesel engine is the important component of Combustion System Design and cylinder cap general structure design
One of, good volumetric efficiency and air movement state play the role of in-cylinder combustion key.Rational air intake duct sample simultaneously
Formula is also beneficial to cylinder cap overall structural arrangement and design, improves Cooling of Cylinder Head, improves reliability.Existing four-valve diesel engine gas
Door generally use arranged in series and torsion arrange, air intake duct is usually the air flue of air flue or mid-shunt of connecting, one of them is spiral shell
Air flue is revolved, another is tangential air flue or is double helix air intake duct；Air intake duct using above-mentioned air flue arrangement form is connection
Body air flue, each cylinder head is interior to have the conjuncted air intake duct identical with number of cylinders, is emptied to meet air flue and cooling jacket cloth
Between, while on the premise of taking into account casting manufacturability, using the cylinder head generally use edge oil sprayer protective cover of existing air intake duct come
Realize the installation of fuel injector and sealing Water Cavity of Cylinder Head.
Air inlet path for diesel engine arrangement relation is to vortex intensity in cylinder and discharge coefficient, while it is logical to influence the cooling of cylinder cap ridge area
Road arranges that there are the following problems for existing diesel intake port layout：
1st, series connection or mid-shunt air intake duct two air inlet runners in engine intake process, which exist, interferes with each other situation,
On the premise of ensureing certain swirl ratio, discharge coefficient is relatively low, and air flue development difficulty is larger.
2nd, to meet air flue and cooling jacket arrangement space, while on the premise of taking into account casting manufacturability, using it is existing into
The cylinder head generally use of air flue inlays oil sprayer protective cover to realize the installation of fuel injector and sealing Water Cavity of Cylinder Head, but installs oil spout
Device sheath needs dedicated tooling device to ensure that technique is cumbersome, while increases cylinder head cost.
3rd, as diesel emission upgrades and power ascension, explosion pressure is constantly promoted in cylinder, inlays the gas of oil sprayer protective cover
Cylinder cap fire power face structural strength is relatively low, and there are cylinder-head distortion is big, cylinder head gasket seal failure, oil sprayer protective cover leak etc. are latent
In risk.
Utility model content
The technical problems to be solved in the utility model is the above-mentioned deficiency for the prior art, provide it is a kind of simple in structure,
Discharge coefficient and swirl ratio can take into account the performance of engine and the multi-cylinder diesel engine air intake duct of emission request.
The technical solution of the utility model is such：A kind of multi-cylinder diesel engine air intake duct, it is described including inlet manifold
Inlet manifold is equipped with multigroup long air intake duct consistent with cylinder of diesel engine quantity and arranged in pairs and short air intake duct, the phase
The inlet port of long air intake duct and short air intake duct on adjacent two cylinders combines together to be formed the long air intake duct and short air inlet
Across the cylinder air intake duct that road connects jointly with the inlet manifold, the outlet of long air intake duct and short air intake duct on the same cylinder
Mouth end is respectively along cylinder bending extension so that the jet direction of the two is tangent with cylinder.
As a further improvement, arc groove is equipped with close to the one side of cylinder on the long air intake duct.
Further, the long air intake duct and short air intake duct are a pair of independently arranged air flue, also, described across cylinder
The Y-shaped structure being integrally formed between air flue and the long air intake duct and short air intake duct.
Further, the height of the long air intake duct be more than the short air intake duct height, the long air intake duct with it is described
The transition structure of indent is equipped with across the joining place of cylinder air intake duct.
Further, resigning area is equipped between the long air intake duct on across the cylinder air intake duct and short air intake duct.
Further, it is integrated between the long air intake duct, short air intake duct, across cylinder air intake duct and the inlet manifold
Molding structure.
Advantageous effect
The utility model compared with prior art, have the advantage that for：
1st, the long air intake duct of each cylinder and short air intake duct are independent tangential air flue, and air flue discharge coefficient is higher, lead to simultaneously
It crosses and optimizes each air intake duct trend, can realize predetermined swirl ratio using the guiding function of cylinder wall to greatest extent.
2nd, across cylinder air intake duct, air inlet section is big, and only there are one single channels every time to supply, then supplies abundance；It is supplied to different cylinders
During gas, the time staggers, and two channel airflows are not interfere with each other, and air-flow is unobstructed.
3rd, across cylinder air intake duct, Y-shaped, which is got, quite to be opened, and much room is reserved to water jacket ridge area, makes structure, the system of cylinder cap
Making craftsmanship becomes fairly good.
4th, long air intake duct outlet port periphery, which is equipped with arc groove, can effectively improve swirl ratio, while guarantee and oil injector seat
Between cooling passage installation, be integrated in so as to fulfill oil sprayer protective cover in cylinder head, it is cold both to have met cylinder head ridge area
But need, improve cylinder head intensity, while also reduce cylinder head production cost
Description of the drawings
Fig. 1 is the main structure diagram of the utility model.
Wherein：Across the cylinder air intake duct of 1- long air intake ducts, 2-, 3- arc grooves, the short air intake ducts of 4-, 5- inlet manifold, 6- cylinders,
7- resignings area, 8- transition structures.
Specific embodiment
Specific embodiment in below in conjunction with the accompanying drawings is described further the utility model.
Refering to Fig. 1, a kind of multi-cylinder diesel engine air intake duct, including inlet manifold 5, inlet manifold 5 be equipped with it is multigroup into bavin
6 quantity of oil machine cylinder is consistent and long air intake duct 1 arranged in pairs and short air intake duct 4, each cylinder 6 have corresponding long air inlet
Road 1 and short air intake duct 4, clean air enters after compressed in inlet manifold 5, then passes through long air intake duct 1 and short air inlet
Road 4 enters in the combustion chamber of each cylinder 6；The inlet port of long air intake duct 1 and short air intake duct 4 on two neighboring cylinder 6 melts
Be formed as one across the cylinder air intake duct 2 for connecting long air intake duct 1 and short air intake duct 4 jointly with inlet manifold 5, can effectively expand into
Gas section increases the long air intake duct 1 of adjacent cylinder 6 and the intake velocity of short air intake duct 4, and the section of across cylinder air intake duct 2 is progress
The sum of inlet port section of air flue 1 and short air intake duct 4, air by across cylinder air intake duct 2 be diverted to again long air intake duct 1 and it is short into
Air flue 4；The outlet port of long air intake duct 1 and short air intake duct 4 on same cylinder 6 is respectively along the bending extension of cylinder 6 so that the two
Jet direction it is tangent with cylinder 6, air flue discharge coefficient is higher, can effectively improve rotary speed of the air around 6 center of cylinder,
Improve the mixture homogeneity of air and fuel oil in cylinder 6, ensure that 6 air inflow of cylinder and burning are abundant；Long air intake duct 1 and short air inlet
Road 4 is all tangent with cylinder 6, and is arranged in 6 different position of cylinder, is moved towards by optimizing each air intake duct, can maximum limit
The guiding function using cylinder wall of degree realizes predetermined swirl ratio, meanwhile, the length difference of long air intake duct 1 and short air intake duct 4 can
So that the time that two strands of air-flows reach cylinder 6 is different, it not only can guarantee 6 air inflow of cylinder, but also swirl ratio can be improved.
Long air intake duct 1 and short air intake duct 4 are a pair of independently arranged air flue, also, across cylinder air flue 2 and long air intake duct 1 and
The Y-shaped structure being integrally formed between short air intake duct 4, long air intake duct 1 and short air intake duct 4 are mutual indepedent to be arranged, intake process
Interfere with each other small, only there are one single channels every time to supply for long air intake duct 1 and short air intake duct 4 in across cylinder air flue 2, and supply is sufficient,
When being supplied to different cylinders, since different cylinder service lifes stagger so that the air-flow in long air intake duct 1 and short air intake duct 4 is mutually not
Interference, air-flow are unobstructed；The length in resigning area 7, i.e. Y-shaped is equipped between long air intake duct 1 and short air intake duct 4 on across cylinder air intake duct 2
Resigning area is equipped between air intake duct 1 and short air intake duct 4, mainly the water jacket bridge of the nose is given to step down, also, Y-shaped is got and quite opened, energy
Much room is reserved to water jacket ridge area, so that the structure of cylinder cap, anufacturability become fairly good；The height of long air intake duct 1
Degree is more than the height of short air intake duct 4, transition structure 8 of the joining place equipped with indent of long air intake duct 1 and across cylinder air intake duct 2, transition
Structure is conducive to improve the anufacturability of across cylinder air intake duct 2 and is conducive to air to flow through progress with the gradual indent transition of arc
Air flue 1；The structure that assumes diamond in shape between long air intake duct 1 and the exhaust duct of short air intake duct 4 and cylinder 6 around oil injector seat surrounding arrange,
It is integrated in so as to fulfill oil sprayer protective cover in cylinder head, cylinder cap layout can be optimized, make cylinder cover structure compact.
Arc groove 3 is equipped with close to the one side of cylinder 6 on long air intake duct 1, air-flow can generate vortex by arc groove 3,
Swirl ratio can be effectively improved, arc groove 3 is indent cylindrical profile, the size of arc groove 3 and long 1 gas outlet ruler of air intake duct
It is very little related, set arc groove 3 that can also ensure that the cooling passage between long air intake duct 1 and oil injector seat is easy for installation, both
Cylinder head ridge area cooling required is met, improves cylinder head intensity, while also reduces cylinder head production cost；Long air inlet
The middle part in road 1 is arc concave shape structure, and gaseous fluid performance is good, is conducive to improve swirl ratio, the both ends size of long air intake duct 1
Greatly, middle part is excessively tapered into camber line, airflow design, and production technology is good, the folder between long air intake duct 1 and inlet manifold 5
Angle is bigger than the angle between short air intake duct 4 and inlet manifold 5, close to vertical between long air intake duct 1 and inlet manifold 5.
It is an integral molding structure between long air intake duct 1, short air intake duct 4, across cylinder air intake duct 2 and inlet manifold 5, air intake duct is whole
Body is compact-sized, intensity is high, anufacturability is good, production cost is low.
Above-described is only the preferred embodiment of the utility model, it should be pointed out that is come for those skilled in the art
It says, on the premise of the utility model structure is not departed from, several modifications and improvements can also be made, these all do not interfere with this reality
With the effect and practical applicability of new implementation.
Claims (6)
1. a kind of multi-cylinder diesel engine air intake duct, including inlet manifold (5), which is characterized in that the inlet manifold (5) is equipped with
Multigroup and arranged in pairs long air intake duct (1) consistent with cylinder of diesel engine (6) quantity and short air intake duct (4), two neighboring institute
The inlet port for stating the long air intake duct (1) on cylinder (6) and short air intake duct (4) combines together to be formed the long air intake duct (1)
Across the cylinder air intake duct (2) connected jointly with the inlet manifold (5) with short air intake duct (4), the progress on the same cylinder (6)
The outlet port of air flue (1) and short air intake duct (4) bent respectively along cylinder (6) extend so that the jet direction of the two and cylinder
(6) it is tangent.
2. a kind of multi-cylinder diesel engine air intake duct according to claim 1, which is characterized in that on the long air intake duct (1)
Arc groove (3) is equipped with close to the one side of cylinder (6).
3. a kind of multi-cylinder diesel engine air intake duct according to claim 1, which is characterized in that the long air intake duct (1) with
Short air intake duct (4) is a pair of independently arranged air flue, also, across the cylinder air flue (2) and the long air intake duct (1) and short
The Y-shaped structure being integrally formed between air intake duct (4).
A kind of 4. multi-cylinder diesel engine air intake duct according to claim 3, which is characterized in that the height of the long air intake duct (1)
More than the height of the short air intake duct (4), the joining place of the long air intake duct (1) and across the cylinder air intake duct (2) is equipped with interior degree
Recessed transition structure (8).
5. a kind of multi-cylinder diesel engine air intake duct according to claim 1, which is characterized in that on across the cylinder air intake duct (2)
Long air intake duct (1) and short air intake duct (4) between be equipped with resigning area (7).
A kind of 6. multi-cylinder diesel engine air intake duct according to claim 1 to 5 any one, which is characterized in that the length
It is an integral molding structure between air intake duct (1), short air intake duct (4), across cylinder air intake duct (2) and the inlet manifold (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721424351.0U CN207406425U (en) | 2017-10-31 | 2017-10-31 | A kind of multi-cylinder diesel engine air intake duct |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721424351.0U CN207406425U (en) | 2017-10-31 | 2017-10-31 | A kind of multi-cylinder diesel engine air intake duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207406425U true CN207406425U (en) | 2018-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721424351.0U Expired - Fee Related CN207406425U (en) | 2017-10-31 | 2017-10-31 | A kind of multi-cylinder diesel engine air intake duct |
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| CN (1) | CN207406425U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605630A (en) * | 2017-10-31 | 2018-01-19 | 广西玉柴机器股份有限公司 | A kind of multi-cylinder diesel engine air intake duct |
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2017
- 2017-10-31 CN CN201721424351.0U patent/CN207406425U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107605630A (en) * | 2017-10-31 | 2018-01-19 | 广西玉柴机器股份有限公司 | A kind of multi-cylinder diesel engine air intake duct |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| 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: 20180525 |