CN208396832U - A kind of burning chamber of diesel engine with water conservancy diversion inclined-plane - Google Patents
A kind of burning chamber of diesel engine with water conservancy diversion inclined-plane Download PDFInfo
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- CN208396832U CN208396832U CN201820347056.8U CN201820347056U CN208396832U CN 208396832 U CN208396832 U CN 208396832U CN 201820347056 U CN201820347056 U CN 201820347056U CN 208396832 U CN208396832 U CN 208396832U
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- water conservancy
- conservancy diversion
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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
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Abstract
A kind of burning chamber of diesel engine with water conservancy diversion inclined-plane, including central boss (8), this chamber structure is the symmetrical structure along central boss (8), it is connected on the outside of central boss (8) with interior guiding surface (7) inside, it is connect on the outside of interior water conservancy diversion inclined-plane (7) with convex ridge (6) inside, it is connected on the outside of convex ridge (6) with pit (5) inside, lower vertical water conservancy diversion is connected on the outside of pit (5) along (4), connect along with lower vertical water conservancy diversion along (4) lower edge on pit (5) outside, lower vertical water conservancy diversion edge on (4) is connected with aditus laryngis (3), outer water conservancy diversion inclined-plane (2) is connected on the upside of aditus laryngis (3), Upper vertical water conservancy diversion is connected on the upside of outer water conservancy diversion inclined-plane (2) along (1), Upper vertical water conservancy diversion extends to piston-top surface along (1) top excessive circular.Improve piston aditus laryngis (3) thermic load, prevent cracking and oxidative exfoliation at aditus laryngis (3), aditus laryngis (3) reliability improves.
Description
Technical field
The utility model relates to a kind of burning chamber of diesel engine, more specifically to a kind of diesel engine combustion with water conservancy diversion inclined-plane
Room is burnt, mixed Daqu and field of combustion technology in cylinder of diesel engine are belonged to.
Background technique
Modern directly jetting turbo charging burning chamber of diesel engine mostly uses the toroidal combustion chamber with necking, or contracts in toroidal combustion chamber
It is excessive using a small stair between mouth and piston-top surface.High pressure fuel injects directly on combustion chamber throat position, so that distribution
Fuel ratio in combustion recess increases, and top of combustion chamber air utilization ratio is low, incomplete combustion, and the thermal efficiency is low；In addition,
To adapt to, engine specific power increases and the increasingly strict rigors of emission regulation, piston especially throat site are faced with more
The test of high mechanical load and thermic load is easy to appear the problems such as piston aditus laryngis oxidative exfoliation or aditus laryngis crack, influences piston
Reliability.
Chinese invention patent " a kind of cylinder of diesel engine piston and the diesel engine using the combustion chamber " (application number:
201310664305.8, the applying date: on December 9th, 2013) a kind of cylinder of diesel engine piston is disclosed, top surface has axial cut
Face outer profile is in the combustion chamber of ω font, and the outside inner wall of the combustion chamber has the interior arc ridge for stretching in cavity, with the arc ridge
The tangent line that is formed of radially projecting highest point to divide the combustion chamber be inside regular zone and groove area；The aditus laryngis of the combustion chamber
There is groove, to form the buffer area that is connected to the groove area, the outer profile of the buffer area is from the groove area at outer
It is in progressive Long-term change trend to piston-top surface.The invention is moved towards by the structure optimization to combustion chamber, adjustable upper vortex,
Meet on the basis of improving the thermal efficiency, reducing oil consumption, can effectively evade the high problem of cylinder cover bottom surface thermic load.But the bavin
Oil machine combustion chamber has the disadvantage that the bottom surface of 1, the combustion chamber groove area is straightway 4, between the straightway and horizontal plane
Angle is 8-10 °, and lesser angle can make the air-fuel mixture in 4 upper grooves area of straightway slow, this will lead to burning speed
Spend slack-off, Diesel Engine Fuel Economy decline.2, the lower whorl profile surface of the arc ridge is for straightway and between the piston-top surface
Angle be 65-75 °, the maximum gauge of the distance of the radially projecting highest point of arc ridge to piston centreline and combustion chamber regular zone it
More obvious than being inside contracted at aditus laryngis for 0.7-0.75, this becomes aditus laryngis with a distance from piston cooling oil passage far, hot at aditus laryngis
Load is high, increases piston failure risk.
Chinese invention patent " diesel engine double-deck diversion combustion system " (application number: 201210152367.6, the applying date:
On May 16th, 2012) a kind of diesel engine with direct injection double-deck diversion combustion system is disclosed, which divides upper layer and lower layer,
Combustion chamber upper layer department's diameter is greater than underclad portion diameter, the space of piston bottom surface and top surface of cylinder cover is reduced, in upper and lower level
Junction is equipped with collision stage.The oily beam that multiple orifice nozzle sprays strikes on collision stage, and a part oil beam is repelled, and realizes secondary
Atomization, a part flow to the upper and lower of combustion chamber along guide surface.It is shunted by guiding, reduction is sprayed at drop point and attachment
Pushing, diffusion velocity is fast, and Air entrainment increases, thus can form relatively uniform gaseous mixture faster, keeps burning rapid
With it is perfect, improve the economy and emission performance of diesel engine.But the diesel engine with direct injection double-deck diversion combustion system have it is following
Defect: although referring to the concept of lower leaf on combustion chamber in the 1, patent, the combustion chamber upper layer 8 of spraying 7 top of collision stage
Space show it is flat, combustion chamber upper layer diameter D1 be much larger than lower layer's diameter D2, it is fast to will lead to lower layer's mixed Daqu speed
It is uneven in gaseous mixture in upper layer, cylinder, fuel economy decline.2, the radially projecting highest point that the combustion chamber is sprayed collision stage is arrived
The distance of piston centreline is much smaller than the radius of combustion chamber lower layer, and piston necking rate is big, and combustion chamber throat position is easy to occur
Ablation and cracking risk；It is abnormal that the cracking of piston will lead to diesel engine work, and a large amount of high-temperature fuel gas is made to pour crankcase, drops
The dynamic property and economy of low diesel engine.
Summary of the invention
The purpose of this utility model is that for thermic load height or combustion at aditus laryngis existing for existing burning chamber of diesel engine
The deficiencies such as oily economy is low, provide a kind of burning chamber of diesel engine with water conservancy diversion inclined-plane.
To achieve the above object, the technical solution of the utility model is: a kind of diesel combustion with water conservancy diversion inclined-plane
Room, including central boss, the central boss are located at bottom of combustion chamber center, this chamber structure is along central boss
Symmetrical structure, central boss two sides respectively include pit, convex ridge and interior water conservancy diversion inclined-plane, lead on the outside of the central boss with interior
It is connected to chamfered inside, is connect on the outside of the interior water conservancy diversion inclined-plane with convex ridge inside, the pit is located at bottom of combustion chamber, institute
On the outside of the convex ridge stated be connected on the inside of pit, be connected with lower vertical water conservancy diversion edge on the outside of the pit, on the outside of pit above edge with
Lower vertical water conservancy diversion connects along lower edge, and the lower vertical water conservancy diversion is connected with aditus laryngis along upper edge, and lower vertical water conservancy diversion is along upper edge
Connect with aditus laryngis downside, outer water conservancy diversion inclined-plane is connected on the upside of the aditus laryngis, is connected with top on the upside of the outer water conservancy diversion inclined-plane
Vertical water conservancy diversion edge, outer water conservancy diversion inclined-plane and Upper vertical the water conservancy diversion circular arc between are excessive, and the Upper vertical water conservancy diversion is along positioned at combustion
Room top is burnt, Upper vertical water conservancy diversion extends to piston-top surface along top excessive circular.
The combustion chamber openings diameter D1=0.72D~0.76D, the distance between opposite sides Upper vertical water conservancy diversion edge
D2=0.7D~0.74D, the distance between opposite sides lower vertical water conservancy diversion edge D3=0.58D~0.65D, opposite sides convex ridge
Center of arc between distance D4=0.33D~0.38D, combustion-chamber depth H1=0.12D~0.16D, aditus laryngis center of arc arrives
Combustion chamber apical side height H2=0.06D~0.1D, Upper vertical water conservancy diversion along bottom far from combustion chamber top surface depth H 3=0.015D~
0.03D, distance H4 of the central boss away from combustion chamber top surface are 4.9mm~6.5mm, and pit radius is 7mm~9.5mm, and wherein D is
Cylinder bore.
The outer water conservancy diversion inclined-plane and combustion chamber top surface angle a1 are 35 °~45 °, in central boss two sides water conservancy diversion inclined-plane it
Between angle a2 be 120 °~140 °.
Compared with prior art, the beneficial effects of the utility model are:
1, it being connected with the straight water conservancy diversion edge in lower part on the outside of the utility model pits, the straight water conservancy diversion in lower part is connected with aditus laryngis along upper edge,
Structure is simple and clear；It is designed at aditus laryngis using no choke, is arranged convenient for piston cooling oil passage, effectively reduce piston cooling oil
The distance of road to aditus laryngis prevents cracking and oxidative exfoliation, aditus laryngis reliability at aditus laryngis from mentioning so as to improve piston aditus laryngis thermic load
It is high.
2, aditus laryngis is located at the position on slightly biased in the middle part of combustion chamber, aditus laryngis center of arc to combustion chamber top surface in the utility model
The ratio of height H2=0.06D~0.1D, combustion-chamber depth H1=0.12D~0.16D, H2 and H1 are 0.4-0.5, pass through burning
Chamber shape cooperates by spraying with high pressure fuel, can effectively avoid increasing as fuel oil spray sets pressure, most of fuel oil sprays into burning
Gaseous mixture overrich phenomenon caused by pit below room.Outer water conservancy diversion inclined-plane 2 and combustion chamber top surface angle a1 is 35 °~45 °, high pressure
Fuel oil is injected in combustion chamber throat position, and a part of fuel oil, which is rolled up along outer water conservancy diversion inclined-plane to top of combustion chamber, to be inhaled, oblique in outer water conservancy diversion
Under the action of face, mixing velocity is accelerated, and improves top of combustion chamber and peripheral fresh air utilization rate；Another part fuel oil along
Suction is internally rolled up on lower vertical water conservancy diversion edge, pit, interior water conservancy diversion inclined-plane, and air is utilized effectively at base wells, is effectively improved
The distribution and the air-fuel mixture uniformity of fuel oil in the entire bags, improve combustion process, ensure that engine have compared with
The high thermal efficiency and lower oil consumption, emission level, after engine Proper Match after-treatment device, emission level can reach state
Six discharges.
Detailed description of the invention
Fig. 1 is the utility model structure diagram.
Fig. 2 is the utility model scale diagrams.
In figure, Upper vertical water conservancy diversion is along 1, outer water conservancy diversion inclined-plane 2, aditus laryngis 3, and lower vertical water conservancy diversion is along 4, pit 5, and convex ridge 6 is interior
Water conservancy diversion inclined-plane 7, central boss 8.
Specific embodiment
The utility model is described in further detail below in conjunction with Detailed description of the invention and specific embodiment.
Referring to Fig. 1, a kind of diesel combustion cell structure with water conservancy diversion inclined-plane is arranged in piston crown, including middle cardiac prominence
Platform 8, the central boss 8 are located at bottom of combustion chamber center, this chamber structure is the symmetrical junction along central boss 8
Structure.
Referring to Fig. 1,8 two sides of central boss respectively include pit 5, convex ridge 6 and interior water conservancy diversion inclined-plane 7.The central boss 8
Be connected on the inside of outside and interior guiding surface 7,7 outside of the interior water conservancy diversion inclined-plane with connected on the inside of convex ridge 6；The pit 5
In bottom of combustion chamber, 6 outside of convex ridge be connected on the inside of pit 5.Lower vertical water conservancy diversion is connected on the outside of the pit 5
Upper edge connects with lower vertical water conservancy diversion along 4 lower edges on the outside of 4, pit 5；Lower vertical water conservancy diversion edge along 4 is connected with larynx
Mouth 3, the lower vertical water conservancy diversion is parallel with piston centre axis along 4, and lower vertical water conservancy diversion is located at 3 downside of aditus laryngis, lower vertical along 4
Water conservancy diversion along 4 along with connect on the downside of aditus laryngis 3.The aditus laryngis 3 is located at the position on slightly biased in the middle part of combustion chamber, connects on the upside of aditus laryngis 3
It is connected to outer water conservancy diversion inclined-plane 2, the top of aditus laryngis 3 is arranged in outer water conservancy diversion inclined-plane 2；Top is connected on the upside of the outer water conservancy diversion inclined-plane 2
Vertical water conservancy diversion is along 1, and outer water conservancy diversion inclined-plane 2 and Upper vertical water conservancy diversion circular arc between 1 are excessive, and the Upper vertical water conservancy diversion is along 1
In combustion chamber top, Upper vertical water conservancy diversion extends to piston-top surface along 1 top excessive circular.
Referring to fig. 2, the combustion chamber openings diameter D1=0.72D~0.76D, opposite sides Upper vertical water conservancy diversion is along 1
The distance between D2=0.7D~0.74D, opposite sides lower vertical water conservancy diversion along the distance between 4 D3=0.58D~0.65D,
Distance D4=0.33D~0.38D between the center of arc of opposite sides convex ridge 6；Combustion-chamber depth H1=0.12D~0.16D, larynx
3 center of arc of mouth are to combustion chamber apical side height H2=0.06D~0.1D, and Upper vertical water conservancy diversion is along 1 bottom far from combustion chamber top surface depth
H3=0.015D~0.03D is spent, distance H4 of the central boss 8 away from combustion chamber top surface is 4.9mm~6.5mm, and 5 radius of pit is
7mm~9.5mm, wherein D is cylinder bore.
Referring to fig. 2, the outer water conservancy diversion inclined-plane 2 and combustion chamber top surface angle a1 are 35 °~45 °, in 8 two sides of central boss
Angle a2 between water conservancy diversion inclined-plane 7 is 120 °~140 °.
Referring to Fig. 1 to 2, the utility model is cooperated by combustion-chamber shape and fuel spray, improves point of fuel oil in space
Cloth and the air-fuel mixture uniformity, to guarantee the engine thermal efficiency with higher and lower oil consumption, emission level；Aditus laryngis 3
Place using no choke design, convenient for piston cooling oil passage arrange, effectively reduce piston cooling oil passage to aditus laryngis 3 distance,
Piston combustion bowl reliability improves.
Referring to Fig. 1 to Fig. 2, embodiment one:
Burning chamber of diesel engine D1=97mm in the utility model, D2=95mm, D3=84mm, D4=48mm, H1=
20.8mm, H2=10mm, H3=3mm, H4=5mm, a1=43, a2=133, R=8.5mm.The program passes through fluid dynamics
It calculates, the present embodiment and currently existing scheme compare, and in the comparable situation of NOx emission, rated point oil consumption reduces by 1.8%, soot
Reduce by 70%.
Referring to Fig. 1 to Fig. 2, this system can also be used instead using gas as power source as other power such as hydraulic, motor
Source.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, above structure
It all shall be regarded as belonging to the protection scope of the utility model.
Claims (3)
1. a kind of burning chamber of diesel engine with water conservancy diversion inclined-plane, including central boss (8), the central boss (8) is located at burning
Room bottom centre position, this chamber structure are the symmetrical structure along central boss (8), and central boss (8) two sides respectively include
Pit (5), convex ridge (6) and interior water conservancy diversion inclined-plane (7), it is characterised in that: on the outside of the central boss (8) and interior water conservancy diversion inclined-plane
(7) inside is connected, and connect on the outside of the interior water conservancy diversion inclined-plane (7) with convex ridge (6) inside, the pit (5) is located at combustion chamber
Bottom, the convex ridge (6) outside and pit (5) inside are connected, and are connected with lower vertical water conservancy diversion edge on the outside of the pit (5)
(4), connect along with lower vertical water conservancy diversion along (4) lower edge on pit (5) outside, the lower vertical water conservancy diversion is on (4) along even
It is connected to aditus laryngis (3), lower vertical water conservancy diversion connects on (4) along with aditus laryngis (3) downside, is connected on the upside of the aditus laryngis (3) outer
Water conservancy diversion inclined-plane (2), Upper vertical water conservancy diversion is connected on the upside of the outer water conservancy diversion inclined-plane (2) along (1), outer water conservancy diversion inclined-plane (2) and upper
The vertical water conservancy diversion in portion circular arc between (1) is excessive, and the Upper vertical water conservancy diversion is located at combustion chamber top along (1), and Upper vertical is led
Stream extends to piston-top surface along (1) top excessive circular.
2. a kind of burning chamber of diesel engine with water conservancy diversion inclined-plane according to claim 1, it is characterised in that: the combustion chamber
Opening diameter D1=0.72D~0.76D, the distance between opposite sides Upper vertical water conservancy diversion edge (1) D2=0.7D~0.74D,
Opposite sides lower vertical water conservancy diversion is along the distance between (4) D3=0.58D~0.65D, the center of arc of opposite sides convex ridge (6)
Between distance D4=0.33D~0.38D, combustion-chamber depth H1=0.12D~0.16D, aditus laryngis (3) center of arc to burning ceiling
Face height H2=0.06D~0.1D, Upper vertical water conservancy diversion along (1) bottom far from combustion chamber top surface depth H 3=0.015D~0.03D,
Distance H4 of the central boss (8) away from combustion chamber top surface is 4.9mm~6.5mm, and pit (5) radius is 7mm~9.5mm, and wherein D is
Cylinder bore.
3. a kind of burning chamber of diesel engine with water conservancy diversion inclined-plane according to claim 1, it is characterised in that: the outer water conservancy diversion
Inclined-plane (2) and combustion chamber top surface angle a1 are 35 °~45 °, the angle a2 in central boss (8) two sides between water conservancy diversion inclined-plane (7)
It is 120 °~140 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820347056.8U CN208396832U (en) | 2018-03-14 | 2018-03-14 | A kind of burning chamber of diesel engine with water conservancy diversion inclined-plane |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820347056.8U CN208396832U (en) | 2018-03-14 | 2018-03-14 | A kind of burning chamber of diesel engine with water conservancy diversion inclined-plane |
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| CN208396832U true CN208396832U (en) | 2019-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488000A (en) * | 2018-03-14 | 2018-09-04 | 东风商用车有限公司 | A kind of burning chamber of diesel engine with water conservancy diversion inclined-plane |
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2018
- 2018-03-14 CN CN201820347056.8U patent/CN208396832U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488000A (en) * | 2018-03-14 | 2018-09-04 | 东风商用车有限公司 | A kind of burning chamber of diesel engine with water conservancy diversion inclined-plane |
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