CN105952554A - Design method of internal combustion engine tangential air way structure all parameters - Google Patents
Design method of internal combustion engine tangential air way structure all parameters Download PDFInfo
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- CN105952554A CN105952554A CN201610237745.9A CN201610237745A CN105952554A CN 105952554 A CN105952554 A CN 105952554A CN 201610237745 A CN201610237745 A CN 201610237745A CN 105952554 A CN105952554 A CN 105952554A
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- air
- air flue
- way
- air intake
- tangential
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/104—Intake manifolds
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a design method of internal combustion engine tangential air way structure all parameters. The shape structure of an internal combustion engine tangential air way is determined by quantization of 18 tangential airway parameters, like an air cylinder diameter; an air inlet way outlet external diameter; an included angle of a connection line between the air cylinder center and the air inlet way outlet center and the air inlet way inlet direction; a distance between the air inlet way outlet and a cylinder cover undersurface; a distance between the air cylinder center and the air inlet way outlet center; an air inlet way length and an inlet width; a distance between the air way center and the air cylinder center; an air inlet way inlet height; a distance between the air way inlet to the cylinder cover undersurface; and pattern draft of the overall air way along a parting line, etc. According to the parameter order, the former 14 items are used for determining the air way structure, and the latter 4 items belong to performance parameters. The 18 air way parameters are taken as the basic data to conduct parametric modeling on the tangential air way so as to obtain a three-dimensional model of the air way. Compared with the traditional design method, the method provided by the invention can optimize the air way performance specifically, and effectively saves the air way development cycle and cost.
Description
Technical field
The invention belongs to the design of internal combustion engine component, be specifically related to the method for designing of a kind of internal combustion engine tangential air flue model.
Background technology
The shape of air passage of internal combustion engine directly influences the quality of in-cylinder air motion and burning, thus affects the dynamic property of electromotor, economy and emission performance to a great extent.Therefore, improve an important means of Fuel Economy and other performance indications, it is exactly the air flue developed and there is superperformance or the air flue with technological deficiency is optimized, it is therefore an objective to designed air intake duct must be able to meet optimal air motion track and higher flow velocity.Owing to air flue has the space curved surface of complexity, so the determination of air flue form parameter is always one of difficult problem in Structure of Internal-Combustion Engine design.Air flue exploitation design mainly has two approach: one is dependent on experience, determines final scheme by the test of air flue steady-flow after processing and fabricating；Two is to use reverse air flue design method, replicates existing air flue, is then optimized it by partial structurtes amendment, to meet performance requirement.Both approaches is applied to air passage of internal combustion engine design, in addition to workload is very big, it is impossible to obtain optimal structural parameters.
In consideration of it, the present invention is on the basis of verifying tangential air flue spatial structure characteristic, it is proposed that a kind of new tangent line air flue design method, can quickly obtain reliable tangential air flue structural parameters.
Summary of the invention
It is an object of the present invention to provide the method for designing of a kind of internal combustion engine tangential air flue structure population parameter, can accurately instruct air flue modelling, meet the requirement of internal combustion engine high-efficiency cleaning burning.
The method for designing of internal combustion engine tangential air flue structure population parameter, determines the shape and structure of internal combustion engine tangential air flue by 18 tangential air flue parameter quantitatives.These 18 parameters are particularly as follows: cylinder bore；Air intake port external diameter；The angle in cylinder axis and the air intake port line of centres and inlet mouth direction；Air intake port and the distance of cylinder cover bottom surface；Cylinder axis is to the distance at air intake port center；Air intake duct length；Inlet mouth center is to the distance of cylinder axis；Inlet mouth width；Inlet mouth height；Inlet mouth center is to the distance of cylinder cover bottom surface；Inlet mouth fillet；Overall air flue is along the pattern draft of parting line；Air flue boss height；Air flue boss diameter；Wall and the angle of cylinder cap baseplane above air intake port；Wall and the angle of cylinder cap baseplane below air intake port；The horizontal sextant angle of cylinder axis and the air intake port line of centres and air intake port centrage；The vertical section height of wall above air intake port.According to upper described reference order, front 14 parameters are for determining the structure of air flue, and latter 4 belong to performance parameter.Data based on 18 airway parameters, carry out parametric modeling to tangential air flue, obtain the threedimensional model of air flue.
The present invention designs from cylinder cap, install on cylinder cap subsidiary body, casting technique, the global planning of the various aspects such as structural strength consider, meeting tangential air flue on the basis of entrance to the descending even transition in outlet stream cross section, determine above-mentioned each parameter, in other words the space structure of tangential air flue is carried out Full Parameterized.
Performance optimization for internal combustion engine tangential air flue, performance discharge coefficient and the strength of vortex two indices of air flue are weighed, but the two index is in the most shifting relation, repeatedly revising adjust to meet the demand of air port performance so generally requiring the structure to air flue during air flue design, time length and cost are high.Latter 4 of above-mentioned parameter is exactly the adjustment for tangential air flue performance.The angle of wall and cylinder cap baseplane below the angle of wall and cylinder cap baseplane, with air intake port above air intake port, along with parameter value must increase, strength of vortex increases therewith, and discharge coefficient reduces therewith；And the horizontal sextant angle of cylinder axis and the air intake port line of centres and air intake port centrage, this value is mainly retrained by space structure, and when 90 °, strength of vortex reaches maximum；The vertical section height of wall above air intake port, along with parameter value must increase, strength of vortex reduces therewith, and discharge coefficient increases therewith.So meet carry out on the basis of boundary condition air port performance optimize time, can be adjusted just for these four parameter values, the final threedimensional model obtaining target capabilities air flue.
The feature of the present invention and the good effect of generation are that traditional method for designing relies primarily on experience and data base, lacks theoretical foundation, require higher to the profile of designer.The method verify airway parameters to air port performance affecting laws on the basis of, the most according to demand the performance of air flue can be optimized, reduce the optimization number of times of air flue, effectively save air flue construction cycle and cost.
Accompanying drawing explanation
Fig. 1 is the parameter corresponding to air flue end face direction.
Fig. 2 is the parameter corresponding to the main apparent direction of air flue.
Detailed description of the invention
Below in conjunction with accompanying drawing and by the method for the present invention being described further with embodiment.
The method for designing of internal combustion engine tangential air flue structure population parameter, is characterized in that being determined the shape and structure of internal combustion engine tangential air flue by 18 tangential air flue parameter quantitatives, and 18 parameters are particularly as follows: parameter 1 is cylinder bore；Parameter 2 is air intake port external diameter；Parameter 3 is the angle of cylinder axis and the air intake port line of centres and inlet mouth direction；Parameter 4 is the distance of air intake port and cylinder cover bottom surface；Parameter 5 is cylinder axis to the distance at air intake port center；Parameter 6 is air intake duct length；Parameter 7 is inlet mouth center to the distance of cylinder axis；Parameter 8 is inlet mouth width；Parameter 9 is inlet mouth height；Parameter 10 is inlet mouth center to the distance of cylinder cover bottom surface；Parameter 11 is inlet mouth fillet；Parameter 12 is the whole air flue pattern draft along parting line；Parameter 13 is air flue boss height；Parameter 14 is air flue boss diameter；Parameter 15 is wall and the angle of cylinder cap baseplane above air intake port；Parameter 16 is wall and the angle of cylinder cap baseplane below air intake port；Parameter 17 is the horizontal sextant angle of cylinder axis and the air intake port line of centres and air intake port centrage；Parameter 18 is the vertical section height of wall above air intake port.
According to the order of above-mentioned parameter, front 14 parameters are for determining the structure of air flue, and latter 4 belong to performance parameter, data based on these 18 airway parameters, and tangential air flue carries out parametric modeling, obtain the threedimensional model of air flue.
Above air intake port, below the angle (parameter 15) of wall and cylinder cap baseplane, with air intake port, angle (parameter 16) selection range of wall and cylinder cap baseplane is 55 ° to 75 °.
The horizontal sextant angle (parameter 17) of cylinder axis and the air intake port line of centres and air intake port centrage, can selection range be 80 ° to 100 °, and this angle strength of vortex when 90 ° reaches maximum.
The vertical section height (parameter 18) of wall above air intake port, can selection range be the engine valve seat ring internal diameter of 0.2 times to 0.5 times.
Based on above-mentioned 18 airway parameters, the air flue of internal combustion engine directly can be optimized design, can also be to the tangential air flue of other any analog structure by changing 18 tangential air flue parameters, carry out parametric modeling, obtaining the threedimensional model of air flue, structure and performance to tangential air flue are adjusted.
As a example by certain diesel engine tangential air flue, carry out the Full Parameterized Design of tangential air flue.The relevant parameter of this diesel engine is shown in Table 1.
The relevant parameter of certain diesel engine tangential air flue of table 1
| Parameter | Value/mm |
| Engine cylinder diameter | 110 |
| Stroke | 130 |
| Length of connecting rod | 230 |
| Air intake duct throat diameter | 33 |
| Maximum valve lift | 10 |
Adjust 18 airway parameters (Fig. 1, Fig. 2) based on this diesel engine tangential air flue boundary condition (air flue and associate member arrangement space, casting technique, structural strength), make the structure designed approach the threedimensional model of original air flue.
Designed tangential air flue should meet from entrance to the principle of the descending even transition in outlet stream cross section.
Data based on 18 airway parameters, carry out parametric modeling to tangential air flue, in modeling process, the skeleton of air flue threedimensional model is built with 18 airway parameters, build the surface of air flue on this basis, ultimately form the entity structure of air flue, and then obtain the final threedimensional model of air flue.It is launched steady state values simulation after completing by structure, flow area and the partial structurtes of new design air flue are all improved compared with Primordial Qi road, new design air flue reduces due to on-way resistance and local resistance, and its negotiability increases substantially, and analog result is as shown in table 2.Compared with designed air flue air flue original with this diesel engine, improve 3% at maximum valve lift tangential air flue discharge coefficient, strength of vortex improves 10%.
Table 2: numerical simulation result
| Numerical simulation result Cf | Numerical simulation result NR | |
| Original air flue | 0.5323 | 0.2830 |
| Parametrization air flue | 0.5483 | 0.3113 |
Its performance of Diesel Engine Passage, on the basis of meeting certain strength of vortex, should improve discharge coefficient as far as possible.In order to maintain original strength of vortex and improve discharge coefficient further, the angle (parameter 15) of wall above air intake port Yu cylinder cap baseplane is adjusted to 60 °.Below air intake port, wall is adjusted to 70 ° with the angle (parameter 16) of cylinder cap baseplane.The horizontal sextant angle (parameter 17) of cylinder axis and the air intake port line of centres and air intake port centrage is 90 °.The engine valve seat ring internal diameter that vertical section height (parameter 18) is 0.2 times of wall above air intake port.
Table 3: numerical simulation result
| Parameter 15 | Parameter 16 | Parameter 17 | Parameter 18 | Numerical simulation result Cf | Numerical simulation result NR |
| 60° | 70° | 90° | 0.2 | 0.5589 | 0.2842 |
Analog result shows (table 3), and final scheme air flue threedimensional model is compared with original air flue, and maximum valve lift tangential air flue discharge coefficient improves 5%, and strength of vortex is held essentially constant.
Claims (5)
1. the method for designing of internal combustion engine tangential air flue structure population parameter, it is characterised in that: by 18 tangential air flue parameter quantitatives
Determine the shape and structure of internal combustion engine tangential air flue, particularly as follows: cylinder bore；Air intake port external diameter；Cylinder axis and air intake duct
Export center line and the angle in inlet mouth direction；Air intake port and the distance of cylinder cover bottom surface；Cylinder axis is to air intake duct
The distance of export center；Air intake duct length；Inlet mouth center is to the distance of cylinder axis；Inlet mouth width；Air inlet
Road entrance height；Inlet mouth center is to the distance of cylinder cover bottom surface；Inlet mouth fillet；Overall air flue pulling out along parting line
Mould gradient；Air flue boss height；Air flue boss diameter；Wall and the angle of cylinder cap baseplane above air intake port；Air intake duct
Wall and the angle of cylinder cap baseplane below outlet；Cylinder axis and the air intake port line of centres and air intake port centrage
Horizontal sextant angle；The vertical section height of wall above air intake port, according to described reference order, front 14 parameters are used for determining gas
The structure in road, latter 4 belong to performance parameter, data based on described 18 airway parameters, and tangential air flue is carried out parametrization
Modeling, obtains the threedimensional model of air flue.
2. according to the method for designing of internal combustion engine tangential air flue structure population parameter described in claim 1, it is characterised in that: described air intake duct
Above outlet, below the angle of wall and cylinder cap baseplane, with air intake port, the angle selection range of wall and cylinder cap baseplane is
55 ° to 75 °.
3. according to the method for designing of internal combustion engine tangential air flue structure population parameter described in claim 1, it is characterised in that: in described cylinder
The horizontal sextant angle of the heart and the air intake port line of centres and air intake port centrage, can selection range be 80 ° to 100 °, this folder
Angle strength of vortex when 90 ° reaches maximum.
4. according to the method for designing of internal combustion engine tangential air flue structure population parameter described in claim 1, it is characterised in that: described air intake duct
The vertical section height of wall above outlet, can selection range be the engine valve seat ring internal diameter of 0.2 times to 0.5 times.
5. according to the method for designing of internal combustion engine tangential air flue structure population parameter described in claim 1, it is characterised in that: by changing institute
State 18 tangential air flue parameters, can be adjusted repairing to the structure of the internal combustion engine tangential air flue of other any analog structure and performance
Change, obtain optimized tangential air flue structure.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072526A (en) * | 2017-11-27 | 2018-05-25 | 天津大学 | A kind of controlled turbulent generating means for fast press |
| CN114757117A (en) * | 2022-03-29 | 2022-07-15 | 江铃汽车股份有限公司 | Diesel engine air inlet performance evaluation method and system, terminal device and storage medium |
| CN115324787A (en) * | 2022-10-14 | 2022-11-11 | 潍柴动力股份有限公司 | Flow deflector in pressure stabilizing cavity of engine, parameter calculation method of flow deflector and related equipment |
| CN114757117B (en) * | 2022-03-29 | 2024-05-31 | 江铃汽车股份有限公司 | Diesel engine air inlet channel performance evaluation method, system, terminal equipment and storage medium |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072526A (en) * | 2017-11-27 | 2018-05-25 | 天津大学 | A kind of controlled turbulent generating means for fast press |
| CN114757117A (en) * | 2022-03-29 | 2022-07-15 | 江铃汽车股份有限公司 | Diesel engine air inlet performance evaluation method and system, terminal device and storage medium |
| CN114757117B (en) * | 2022-03-29 | 2024-05-31 | 江铃汽车股份有限公司 | Diesel engine air inlet channel performance evaluation method, system, terminal equipment and storage medium |
| CN115324787A (en) * | 2022-10-14 | 2022-11-11 | 潍柴动力股份有限公司 | Flow deflector in pressure stabilizing cavity of engine, parameter calculation method of flow deflector and related equipment |
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Application publication date: 20160921 |