CN1877098A - Helical air intake channel of single-cylinder direct-injection diesel engine - Google Patents
Helical air intake channel of single-cylinder direct-injection diesel engine Download PDFInfo
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- CN1877098A CN1877098A CNA2006100882055A CN200610088205A CN1877098A CN 1877098 A CN1877098 A CN 1877098A CN A2006100882055 A CNA2006100882055 A CN A2006100882055A CN 200610088205 A CN200610088205 A CN 200610088205A CN 1877098 A CN1877098 A CN 1877098A
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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
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention relates to a screw air inlet channel of single cylinder jet diesel engine whose cylinder diameter is 75-80mm. wherein, the invention is arranged inside the cylinder; the inlet channel is formed by inlet of air channel, screw room and the outlet of screw room; the screw room is formed by several sections of solid arcs which are tangent. The invention can generate high-vortex rate to meet the demand of jet diesel engine, without reduced air inlet and increased inlet resistance.
Description
Technical field
The present invention relates to a kind of diesel engine part, especially a kind of spiral inlet duct that is applicable to cylinder diameter 75～80mm single-cylinder direct-injection diesel engine.
Background technique
The influence that the power character of direct injection diesel engine, Economy are subjected to the air inlet quality is bigger, and the air inlet of diesel engine is fully from the intake duct that is arranged in the cylinder cap.Higher intake swirl ability is to the power character of complete machine, Economy has favourable influence, for small-bore diesel engine, the layout of intake duct trend is subjected to the restriction of cylinder cap self structure size, be not easy to realize high-eddy, the rotating speed of China's small-sized single cylinder diesel engine is lower than 3000 rev/mins mostly, take to increase the way of " training wall " generally speaking, forced draft enters cylinder along the water conservancy diversion direction of expection, produce high-eddy with this, but, make in this way and can reduce charge flow rate, increase intake resistance, this situation is very disadvantageous for the motor that needs the oxygen-enriched combusting acting.
Summary of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of spiral inlet duct of single-cylinder direct-injection diesel engine, this Three-Dimensional Spiral Inlet can be under the situation of not using " training wall ", spiral inlet duct is carried out reasonable Arrangement on cylinder head, make swirl rate and flow coefficient that a coupling preferably be arranged, guaranteed the performance of straight spray working procedure.
75～80mm cylinder diameter single cylinder diesel air cylinder head structure compactness, its cylinder head bolt spacing is little, and helical intake is easy to interfere with the cylinder head bolt lug, and the present invention takes the shape of following three measures design helical intake, and carries out reasonable Arrangement on cylinder head.First under the prerequisite that does not influence the cylinder head general structure, air flue water conservancy diversion length extends as far as possible, second chooses suitable turbine guide angle obtains enough air inlet rotating energies, and the 3rd adopts abrupt slope formula volute finally to make air flue swirl rate and air flue flow coefficient reach designing requirement.
The technical solution adopted for the present invention to solve the technical problems is: a kind of spiral inlet duct of single-cylinder direct-injection diesel engine, intake duct is made up of air flue import, volute and volute outlet, the volute export center is to distance A=18～20mm of cylinder centerline abscissa x, the volute export center to cylinder centerline y coordinate y apart from B=4～6mm; The air flue import is vertical mutually with volute export center axis, perpendicular distance M=35～37mm, the perpendicular distance L=83～86mm of the inletpiston of air flue import and volute export center axis.
In order to optimize the structure of spiral inlet duct, make swirl rate and flow coefficient that a coupling preferably be arranged, further: described volute combines R1=1.5～2.5mm, R2=17～20mm, R3=17～19mm, R4=75～78mm, R5=30～33mm, R6=65～69mm, R7=76～79mm, R8=14～16mm, R9=15～17mm by the three-dimensional circular arc R 1 of tangent multistage, R2, R3, R4, R5, R6, R7, R8, R9.
Again further: be provided with the conduit boss in the described volute, the conduit raised head face is to the distance h=26～28mm of cylinder head bottom plane, and air flue import center is to the distance H=36～40mm of volute exit end face.
For fear of the mutual interference of helical intake and cylinder head bolt lug, further: wall thickness S 〉=4mm between described volute water diversion part and cylinder head bolt hole.
The invention has the advantages that:
1. can produce the high-eddy ratio that satisfies direct injection diesel engine burning needs;
2. there is not the negative effect that obviously reduces charge flow rate, increases intake resistance.
3. solved small-bore diesel engine because of the compact problem that causes the spiral inlet duct difficult arrangement of air cylinder head structure, warded off effective way for realizing that small diesel engine directly sprays to melt.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is of the present invention and cylinder location relational structure schematic representation.
Fig. 2 is a structural representation of the present invention.
Fig. 3 is the plan view of Fig. 2.
Fig. 4 is that Fig. 3 is at the A-A in volute outlet port sectional view.
Fig. 5 is that Fig. 3 is at the B-B in volute outlet port sectional view.
Among the figure: 1. air flue import 2. volutes 3. volutes export 4. conduit boss, 5. cylinder head bolt holes
A is the distance of volute export center to cylinder centerline abscissa x
B is the distance of volute export center to cylinder centerline y coordinate y
M is air flue import and volute export center axis normal distance
L is the perpendicular distance of the inletpiston and the volute export center axis of air flue import
H is the distance of conduit raised head face to the cylinder head bottom plane of cylinder
H is the distance of air flue import center to the volute exit end face
R1, R2, R3, R4, R5, R6, R7, R8, R9 are the radius of arc that is combined into three-dimensional spiral
R10, R11, R12, R13, R14, R15, R16, R17 are each radius of arc in A-A sectional view, the B-B sectional view
H1, h2, be respectively air flue top, A-A section place to the distance of cylinder head bottom plane
H3, h4, be respectively air flue top, B-B section place to the distance of cylinder head bottom plane
Embodiment
Below in conjunction with accompanying drawing the present invention is further described.
The spiral inlet duct of a kind of single-cylinder direct-injection diesel engine as shown in Figure 1 to Figure 3, intake duct is made up of air flue import 1, volute 2 and volute outlet 3, volute exports 3 centers to distance A=18～20mm of cylinder centerline abscissa x, volute export 3 centers to cylinder centerline y coordinate y apart from B=4～6mm; It is vertical mutually that air flue import 1 and volute export 3 central axis, and perpendicular distance M=35～37mm, the inletpiston of air flue import 1 and volute export the perpendicular distance L=83～86mm of 3 central axis.Described volute 2 combines R1=1.5～2.5mm, R2=17～20mm, R3=17～19mm, R4=75～78mm, R5=30～33mm, R6=65～69mm, R7=76～79mm, R8=14～16mm, R9=15～17mm by the three-dimensional circular arc R 1 of tangent multistage, R2, R3, R4, R5, R6, R7, R8, R9.Be provided with conduit boss 4 in the described volute 2, conduit boss 4 end faces are to the distance h=26～28mm of the cylinder head bottom plane of cylinder, and air flue import 1 center exports the distance H=36～40mm of 3 end faces to volute.Described volute 2 water diversion parts and 5 the wall thickness S 〉=4mm in cylinder head bolt hole.
Fig. 4 is the A-A sectional view in volute outlet port, wherein should locate the distance h 1=45～48mm of air flue top to the cylinder head bottom plane, h2=33～36mm, R10=3～5mm, R11=5～7mm, R12=10～12mm, R13=39～42mm; Fig. 5 is the B-B sectional view in volute outlet port, wherein should locate the distance h 3=39～41mm of air flue top to the cylinder head bottom plane, h4=26～28mm, R14=3～5mm, R15=70～73mm, R16=5～7mm, R17=1～3mm.
Because the spiral structure that intake duct adopts the three-dimensional circular arc of multistage to form, make air-flow when the intake duct of process helix structure, can produce the high-eddy ratio that satisfies direct injection diesel engine burning needs, and not have the negative effect that obviously reduces charge flow rate, increases intake resistance.
Claims (4)
1. the spiral inlet duct of a single-cylinder direct-injection diesel engine, intake duct is made up of air flue import (1), volute (2) and volute outlet (3), it is characterized in that: volute outlet (3) center arrive to distance A=18～20mm, volute outlet (3) center of cylinder centerline abscissa x cylinder centerline y coordinate y apart from B=4～6mm; Air flue import (1) is vertical mutually with volute outlet (3) central axis, perpendicular distance M=35～37mm, the perpendicular distance L=83～86mm of the inletpiston of air flue import (1) and volute outlet (3) central axis.
2. the spiral inlet duct of single-cylinder direct-injection diesel engine according to claim 1, it is characterized in that: described volute (2) combines R1=1.5～2.5mm, R2=17～20mm, R3=17～19mm, R4=75～78mm, R5=30～33mm, R6=65～69mm, R7=76～79mm, R8=14～16mm, R9=15～17mm by the three-dimensional circular arc R 1 of tangent multistage, R2, R3, R4, R5, R6, R7, R8, R9.
3. the spiral inlet duct of single-cylinder direct-injection diesel engine according to claim 1, it is characterized in that: be provided with conduit boss (4) in the described volute (2), conduit boss (4) end face is to the distance h=26～28mm of the cylinder head bottom plane of cylinder, and air flue import (1) center is to the distance H=36～40mm of volute outlet (3) end face.
4. the spiral inlet duct of single-cylinder direct-injection diesel engine according to claim 1 is characterized in that: wall thickness S 〉=4mm between described volute (2) water diversion part and cylinder head bolt hole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100882055A CN1877098A (en) | 2006-07-04 | 2006-07-04 | Helical air intake channel of single-cylinder direct-injection diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100882055A CN1877098A (en) | 2006-07-04 | 2006-07-04 | Helical air intake channel of single-cylinder direct-injection diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1877098A true CN1877098A (en) | 2006-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100882055A Pending CN1877098A (en) | 2006-07-04 | 2006-07-04 | Helical air intake channel of single-cylinder direct-injection diesel engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787936A (en) * | 2012-06-15 | 2012-11-21 | 东风朝阳朝柴动力有限公司 | Low-swirl-rate spiral air inlet passage of diesel |
| CN113250868A (en) * | 2021-06-30 | 2021-08-13 | 潍柴动力股份有限公司 | Air inlet passage structure and engine |
-
2006
- 2006-07-04 CN CNA2006100882055A patent/CN1877098A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787936A (en) * | 2012-06-15 | 2012-11-21 | 东风朝阳朝柴动力有限公司 | Low-swirl-rate spiral air inlet passage of diesel |
| CN113250868A (en) * | 2021-06-30 | 2021-08-13 | 潍柴动力股份有限公司 | Air inlet passage structure and engine |
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Open date: 20061213 |