CN204344261U - A kind of burning chamber of diesel engine - Google Patents
A kind of burning chamber of diesel engine Download PDFInfo
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- CN204344261U CN204344261U CN201420814927.4U CN201420814927U CN204344261U CN 204344261 U CN204344261 U CN 204344261U CN 201420814927 U CN201420814927 U CN 201420814927U CN 204344261 U CN204344261 U CN 204344261U
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- firing chamber
- plane
- chamber
- diesel engine
- tapered inclined
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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 disclosed in the utility model, this firing chamber is set to ω firing chamber, and the open end of described ω firing chamber forms the tapered inclined-plane expanded outwardly by the inner chamber of described ω firing chamber; In the utility model, expand hot area bottom cylinder head by arranging described tapered inclined-plane, thus reduce the local heat load of cylinder head; Meanwhile, compared with traditional reducing toroidal combustion chamber, this firing chamber contributes to being separated with wall fast after oil bundle hits wall, thus reduces the hydrocarbon, the carbon smoke exhaust that produce because wall piles up fuel oil; The effect strengthening extruding swirl can be played, oil, gas rule is on request made to carry out mixing fully and burning, reach best oil consumption and exhaust index, and the criterion of the fuel consumption is compared with former design, energy-conservation more than 10%, thus make fuel oil in this firing chamber combustion fully and can not slagging scorification on the bottom surface of cylinder cover for diesel engine and piston crater inwall as much as possible.
Description
Technical field
The utility model relates to a kind of diesel engine, relates in particular to a kind of burning chamber of diesel engine.
Background technique
Increasingly serious along with environmental issue, performs stricter Abgasgesetz to diesel engine.In order to reduce exhausted pollutant of diesel engine discharge, the coupling of highly organized In-cylinder flow, Spray and combustion room has important effect.
When the piston is at the top dead center, the space formed more than piston-top surface, below cylinder head bottom surface is called firing chamber, the mixing and burning that it is not only combustion gas provides space, and rationalization's air-flow is to obtain good burning, the matching effect of its structure and oil-fired system element directly affects performance and the working efficiency of diesel engine, so have sizable promoting effect to the development of optimization to diesel engine of combustion-chamber shape.
Current diesel engine with direct injection piston adopts toroidal combustion chamber usually, toroidal combustion chamber realizes comparatively uniform " oil gas moves mutually " spatial mixing, the effect of fuel oil injection and air movement (based on intake swirl, crowded stream is auxiliary) two aspects is utilized to form mixed gas.Toroidal combustion chamber utilizes oil gas mutually to move, more easily form homogeneous mixture, air utilization ratio is high, (1.3 ~ 1.5) perfect combustion can be realized under less excess air coefficient, can meet vehicle high speed diesel engine mixed Daqu and the higher requirement of velocity of combustion, fuel consumption rate is lower, startability good.
The direct injection diesel engine piston of each model of current China widely uses Zhi Kou toroidal combustion chamber or reducing toroidal combustion chamber, mixed gas in the firing chamber of the therefore piston head of diesel engine is when burning, larger firing pressure and very high combustion temperature can be formed in firing chamber, make the bottom surface of cylinder cover for diesel engine and piston crater inwall bear very large heat load; But local heat load is excessive, not only can not ensure complete combustion of fuel, combustion efficiency is declined, easily there is slagging scorification in fuel oil simultaneously on the bottom surface of cylinder cover for diesel engine and piston crater inwall.
Model utility content
For this reason, technical problem to be solved in the utility model is that ω firing chamber of the prior art is Zhi Kou toroidal combustion chamber or reducing toroidal combustion chamber, and its local heat load is excessive and easily cause combustion efficiency to decline or fuel oil slagging scorification; And then provide a kind of and reduce local heat load and make oil inflame fully and can not the burning chamber of diesel engine of slagging scorification.
For solving the problems of the technologies described above, a kind of burning chamber of diesel engine of the present utility model, this firing chamber is set to ω firing chamber, and the open end of described ω firing chamber forms the tapered inclined-plane expanded outwardly by the inner chamber of described ω firing chamber.
The center of circle of the large end circumference on described tapered inclined-plane is coaxial with the axle center of described ω firing chamber, and the center of circle of the small end circumference on described tapered inclined-plane is coaxial with the axle center of described ω firing chamber.
The center of circle of the large end circumference on described tapered inclined-plane is coaxial with the axle center of described ω firing chamber, and there is throw of eccentric between the axle center of the center of circle of the small end circumference on described tapered inclined-plane and described ω firing chamber.
Described throw of eccentric is set to 0-5mm.
The first arc transition section is provided with between the described large end on described tapered inclined-plane and the described opening end end face of described ω firing chamber; The second arc transition section is provided with between the described small end on described tapered inclined-plane and the base wells of described ω firing chamber.
The number of degrees of the angle between described tapered inclined-plane and the described opening end end face of described ω firing chamber are set to the arbitrary value between 0-90.
The bottom of described ω firing chamber forms raised platforms.
Connection inclined-plane is provided with between the base wells of described raised platforms and described ω firing chamber.
Described raised platforms is provided with three-arc changeover portion with the described joint being connected inclined-plane.
Technique scheme of the present utility model has the following advantages compared to existing technology:
1, in the utility model, expand hot area bottom cylinder head by arranging described tapered inclined-plane, thus reduce the local heat load of cylinder head; Meanwhile, compared with traditional reducing toroidal combustion chamber, this firing chamber contributes to being separated with wall fast after oil bundle hits wall, thus reduces the hydrocarbon, the carbon smoke exhaust that produce because wall piles up fuel oil; The effect strengthening extruding swirl can be played, oil, gas rule is on request made to carry out mixing fully and burning, reach best oil consumption and exhaust index, and the criterion of the fuel consumption is compared with former design, energy-conservation more than 10%, thus make fuel oil in this firing chamber combustion fully and can not slagging scorification on the bottom surface of cylinder cover for diesel engine and piston crater inwall as much as possible.
2, in the utility model, the center of circle of the large end circumference on described tapered inclined-plane is coaxial with the axle center of described ω firing chamber, and the center of circle of the small end circumference on described tapered inclined-plane can be coaxial or eccentric with the axle center of described ω firing chamber; Eccentric described tapered inclined-plane can be restrainted with oil spout oil and match, and increase air-fuel mixture and oil gas utilization ratio, meanwhile, eccentric non-symmetry structure can strengthen intake swirl.
3, in the utility model, in compression process, described tapered inclined-plane place can form extruding adverse current region, the adverse current of described gas is convenient in the setting of described first arc transition section and described second arc transition section, increase the eddy velocity of the gas in this ω firing chamber, be beneficial to the mixing of fuel oil and air in this ω firing chamber, improve combustion efficiency.
4, in the utility model, the compression area of described raised platforms is greater than the compression area of pointed projection of the prior art; Therefore in extrusion process, described raised platforms place forms larger adverse current group, this adverse current group can converge mutually at the pit of described ω firing chamber and the counter-current gas got off in described tapered inclined-plane place, thus increase the gas flow rates of described ω firing chamber, be beneficial to the mixing of fuel oil and air, improve combustion efficiency.
5, in the utility model, the back flow of gas at described raised platforms place is all convenient in the setting of described connection inclined-plane and described three-arc changeover portion.
Accompanying drawing explanation
In order to make content of the present utility model be more likely to be clearly understood, below according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein
Fig. 1 is the schematic cross-section of the described ω firing chamber of embodiment 1;
Fig. 2 is the plan view of the described ω firing chamber of embodiment 1;
Fig. 3 is the schematic cross-section of the described ω firing chamber of embodiment 2;
Fig. 4 is the plan view of the described ω firing chamber of embodiment 2;
In figure, reference character is expressed as: 1-ω firing chamber; 11-opening end; 12-opening end end face; 13-pit; The tapered inclined-plane of 2-; The large end of 21-; 22-small end; 31-first arc transition section; 32-second arc transition section; 33-three-arc changeover portion; 4-raised platforms; 41-connects inclined-plane; δ-throw of eccentric; α-angle.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Embodiment 1
As illustrated in fig. 1 and 2, a kind of burning chamber of diesel engine of the present embodiment, this firing chamber is set to ω firing chamber 1, and opening end 11 place of described ω firing chamber 1 forms the tapered inclined-plane 2 expanded outwardly by the inner chamber of described ω firing chamber 1; The present embodiment expands hot area bottom cylinder head by arranging described tapered inclined-plane, thus reduces the local heat load of cylinder head; Meanwhile, compared with traditional reducing toroidal combustion chamber, this firing chamber contributes to being separated with wall fast after oil bundle hits wall, thus reduces the hydrocarbon, the carbon smoke exhaust that produce because wall piles up fuel oil; The effect strengthening extruding swirl can be played, oil, gas rule is on request made to carry out mixing fully and burning, reach best oil consumption and exhaust index, and the criterion of the fuel consumption is compared with former design, energy-conservation more than 10%, thus make fuel oil in this firing chamber combustion fully and can not slagging scorification on the bottom surface of cylinder cover for diesel engine and piston crater 13 inwall as much as possible.
Particularly, the center of circle of large end 21 circumference on described tapered inclined-plane 2 is coaxial with the axle center of described ω firing chamber 1, and the center of circle of small end 22 circumference on described tapered inclined-plane 2 is coaxial with the axle center of described ω firing chamber 1, as shown in Figure 2.
Further, in the present embodiment, between the described large end 21 on described tapered inclined-plane and the described opening end end face 12 of ω firing chamber 1, be provided with the first arc transition section 31; The second arc transition section 32 is provided with between the described small end 22 on described tapered inclined-plane and the base wells 13 of ω firing chamber 1.That is, in compression process, described tapered inclined-plane 2 place can form extruding adverse current region, the adverse current of described gas is convenient in the setting of described first arc transition section 31 and described second arc transition section 32, increase the eddy velocity of the gas in this ω firing chamber 1, be beneficial to the mixing of fuel oil and air in this ω firing chamber 1, improve combustion efficiency.
The number of degrees of the angle α between described tapered inclined-plane and the described opening end end face 12 of described ω firing chamber 1 are set to the arbitrary value between 0-90; Wherein, described opening end end face 12 is piston flat surface, and that is, the number of degrees of the angle α between the described piston flat surface of described tapered inclined-plane and described ω firing chamber 1 are set to the arbitrary value between 0-90; In the present embodiment, because both centers of circle of the center of circle of large end 21 circumference on described tapered inclined-plane 2 and small end 22 circumference on described tapered inclined-plane 2 are all coaxial with the axle center of described ω firing chamber 1, so the angle α between described tapered inclined-plane 2 with described opening end end face 12 is identical all the time, described angle α can close to 0 degree or 90 degree of designs, but be not set to 0 degree or 90 degree, but the arbitrary value between both.
Particularly, in the present embodiment, the bottom of described ω firing chamber 1 forms raised platforms 4; The compression area of described raised platforms 4 is greater than the compression area of pointed projection of the prior art; Therefore in extrusion process, described raised platforms 4 place forms larger adverse current group, this adverse current group can converge mutually at the pit of described ω firing chamber 1 and the counter-current gas got off in described tapered inclined-plane 2 place, thus increase the gas flow rates of described ω firing chamber 1, be beneficial to the mixing of fuel oil and air, improve combustion efficiency.Wherein, the diameter of preferred described raised platforms 4 is 5-10mm.
On the basis of above-described embodiment, be provided with between the described raised platforms 4 of the present embodiment and the base wells of described ω firing chamber 1 and connect inclined-plane 41; Described raised platforms 4 is provided with three-arc changeover portion 33 with the described joint being connected inclined-plane 41; And the back flow of gas at described raised platforms 4 place is all convenient in the setting of described connection inclined-plane 41 and described three-arc changeover portion 33.
Embodiment 2
As shown in Figures 3 and 4, a kind of burning chamber of diesel engine of the present embodiment, this firing chamber is set to ω firing chamber 1, and opening end 11 place of described ω firing chamber 1 forms the tapered inclined-plane 2 expanded outwardly by the inner chamber of described ω firing chamber 1; The present embodiment expands hot area bottom cylinder head by arranging described tapered inclined-plane, thus reduces the local heat load of cylinder head; Meanwhile, compared with traditional reducing toroidal combustion chamber, this firing chamber contributes to being separated with wall fast after oil bundle hits wall, thus reduces the hydrocarbon, the carbon smoke exhaust that produce because wall piles up fuel oil; The effect strengthening extruding swirl can be played, oil, gas rule is on request made to carry out mixing fully and burning, reach best oil consumption and exhaust index, and the criterion of the fuel consumption is compared with former design, energy-conservation more than 10%, thus make fuel oil in this firing chamber combustion fully and can not slagging scorification on the bottom surface of cylinder cover for diesel engine and piston crater inwall as much as possible.
The center of circle of large end 21 circumference on described tapered inclined-plane 2 is coaxial with the axle center of described ω firing chamber 1, and there is throw of eccentric δ between the center of circle of small end 22 circumference on described tapered inclined-plane 2 and the axle center of described ω firing chamber 1, as shown in Figure 4; Eccentric described tapered inclined-plane 2 can be restrainted with oil spout oil and match, and increase air-fuel mixture and oil gas utilization ratio, meanwhile, eccentric non-symmetry structure can strengthen intake swirl.Wherein, described throw of eccentric δ is set to 0-5mm.
Further, in the present embodiment, between the described large end 21 on described tapered inclined-plane and the described opening end end face 12 of ω firing chamber 1, be provided with the first arc transition section 31; The second arc transition section 32 is provided with between the described small end 22 on described tapered inclined-plane and the base wells of ω firing chamber 1.That is, in compression process, described tapered inclined-plane 2 place can form extruding adverse current region, the adverse current of described gas is convenient in the setting of described first arc transition section 31 and described second arc transition section 32, increase the eddy velocity of the gas in this ω firing chamber 1, be beneficial to the mixing of fuel oil and air in this ω firing chamber 1, improve combustion efficiency.
The number of degrees of the angle α between described tapered inclined-plane and the described opening end end face 12 of described ω firing chamber 1 are set to the arbitrary value between 0-90; Wherein, described opening end end face 12 is piston flat surface, and that is, the number of degrees of the angle α between the described piston flat surface of described tapered inclined-plane and described ω firing chamber 1 are set to the arbitrary value between 0-90; In the present embodiment, because the center of circle of large end 21 circumference on described tapered inclined-plane 2 is coaxial with the axle center of described ω firing chamber 1, and there is throw of eccentric δ between the center of circle of small end 22 circumference on described tapered inclined-plane 2 and the axle center of described ω firing chamber 1; So the angle α between described tapered inclined-plane 2 and described opening end end face 12 is not same value, that is, the described angle α intercepted in different places is not identical, but the number of degrees of described angle α are always the arbitrary value between 0-90, namely minimum only close to 0, maximum only close to 90.
Particularly, in the present embodiment, the bottom of described ω firing chamber 1 forms raised platforms 4; The compression area of described raised platforms 4 is greater than the compression area of pointed projection of the prior art; Therefore in extrusion process, described raised platforms 4 place forms larger adverse current group, this adverse current group can converge mutually at the pit of described ω firing chamber 1 and the counter-current gas got off in described tapered inclined-plane 2 place, thus increase the gas flow rates of described ω firing chamber 1, be beneficial to the mixing of fuel oil and air, improve combustion efficiency.Wherein, the diameter of preferred described raised platforms 4 is 5-10mm.
On the basis of above-described embodiment, be provided with between the described raised platforms 4 of the present embodiment and the base wells of described ω firing chamber 1 and connect inclined-plane 41; Described raised platforms 4 is provided with three-arc changeover portion 33 with the described joint being connected inclined-plane 41; And the back flow of gas at described raised platforms 4 place is all convenient in the setting of described connection inclined-plane 41 and described three-arc changeover portion 33.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all mode of executions.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (9)
1. a burning chamber of diesel engine, this firing chamber is set to ω firing chamber (1), it is characterized in that: opening end (11) place of described ω firing chamber (1) forms the tapered inclined-plane (2) expanded outwardly by the inner chamber of described ω firing chamber (1).
2. a kind of burning chamber of diesel engine according to claim 1, it is characterized in that: the center of circle of large end (21) circumference of described tapered inclined-plane (2) is coaxial with the axle center of described ω firing chamber (1), and the center of circle of described small end (22) circumference on described tapered inclined-plane (2) is coaxial with the axle center of described ω firing chamber (1).
3. a kind of burning chamber of diesel engine according to claim 1, it is characterized in that: the center of circle of the end circumference of the large end (21) of described tapered inclined-plane (2) is coaxial with the axle center of described ω firing chamber (1), and there is throw of eccentric (δ) between the center of circle of the end circumference of the described small end (22) on described tapered inclined-plane (2) and the axle center of described ω firing chamber (1).
4. a kind of burning chamber of diesel engine according to claim 3, is characterized in that: described throw of eccentric (δ) is set to 0-5mm.
5. a kind of burning chamber of diesel engine according to any one of claim 1-4, is characterized in that: be provided with the first arc transition section (31) between the large end (21) on described tapered inclined-plane and the described opening end end face (12) of described ω firing chamber (1); The second arc transition section (32) is provided with between the described small end (22) on described tapered inclined-plane and the base wells (13) of described ω firing chamber (1).
6. a kind of burning chamber of diesel engine according to claim 5, is characterized in that: the number of degrees of the angle (α) between described tapered inclined-plane and the described opening end end face (12) of described ω firing chamber (1) are set to the arbitrary value between 0-90.
7. a kind of burning chamber of diesel engine according to any one of claim 1-4, is characterized in that: the bottom of described ω firing chamber (1) forms raised platforms (4).
8. a kind of burning chamber of diesel engine according to claim 7, is characterized in that: be provided with between the base wells (13) of described raised platforms (4) and described ω firing chamber (1) and connect inclined-plane (41).
9. a kind of burning chamber of diesel engine according to claim 8, is characterized in that: described raised platforms (4) is provided with three-arc changeover portion (33) with the described joint being connected inclined-plane (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420814927.4U CN204344261U (en) | 2014-12-18 | 2014-12-18 | A kind of burning chamber of diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420814927.4U CN204344261U (en) | 2014-12-18 | 2014-12-18 | A kind of burning chamber of diesel engine |
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| Publication Number | Publication Date |
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| CN204344261U true CN204344261U (en) | 2015-05-20 |
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| CN201420814927.4U Active CN204344261U (en) | 2014-12-18 | 2014-12-18 | A kind of burning chamber of diesel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482762A (en) * | 2021-07-30 | 2021-10-08 | 东风商用车有限公司 | Combustion chamber and combustion system of medium-heavy diesel engine |
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- 2014-12-18 CN CN201420814927.4U patent/CN204344261U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113482762A (en) * | 2021-07-30 | 2021-10-08 | 东风商用车有限公司 | Combustion chamber and combustion system of medium-heavy diesel engine |
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