CN102619639B - Swirl-regulable air inlet system - Google Patents
Swirl-regulable air inlet system Download PDFInfo
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- CN102619639B CN102619639B CN2012101143516A CN201210114351A CN102619639B CN 102619639 B CN102619639 B CN 102619639B CN 2012101143516 A CN2012101143516 A CN 2012101143516A CN 201210114351 A CN201210114351 A CN 201210114351A CN 102619639 B CN102619639 B CN 102619639B
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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 swirl-regulable air inlet system, which belongs to the technical field of engine intake systems. The technical problem to be solved which can regulate the swirl intensity and intake flow of air inlets of a direct injection type diesel engine. In the adopted technical scheme, a section-adjusting valve is arranged on the end of a baffle tongue between the tangential air inlet and the helical air inlet on a cylinder cover, and an adjusting mechanism for controlling the section-adjusting valve to rotate is mounted on the section-adjusting valve and upon the cylinder cover; in the structure of the adjusting mechanism, a rack bar is arranged between two stop dogs, moreover, the distance between the two stop dogs is greater than the length of the rack bar, the rack bar is engaged with a first gear and a second gear, the first gear is connected with the output shaft of an electromotor, the second gear is fixedly connected with one end of a screw, and the other end of the screw is fixedly connected with the section-adjusting valve. The swirl-regulable air inlet system is used for regulating the swirl intensity in the engine air inlets.
Description
Technical field
The intake duct device of the adjustable eddy current of the present invention, belong to the engine aspirating system technical field, is specifically related to a kind of adjustable vortex air intake duct device of two intake valve direct injection diesel engine.
Background technique
Internal-combustion engine since coming out, has played extremely important effect to the development that promotes human civilization.At present, internal-combustion engine remains the highest heat engine of the thermal efficiency, is widely used in the every field of human society.
In the evolution of diesel engine, people are always improving burning quality as the power character that improves diesel engine and the main path of Economy.The important means of improving burning quality and optimize mixture formation process.The principal element that affects the formation of diesel engine with direct injection mixed gas is: oil bundle kinetic energy, the kinergety of air and the geometrical shape of firing chamber.The kinergety of its Air is mainly determined by intake swirl.
The mechanism that forms according to eddy current is different, and intake duct is divided into two large class, i.e. tangential air flue and helical intakes.The eddy current of helical intake is to produce in air flue more than intake valve, and the eddy current of tangential air flue air-flow in cylinder is subject to the leading role of cylinder wall, forms.Tangential air flue has higher flow coefficient and less swirl rate.And helical intake is good to rotating speed adaptability, and not too responsive to the change of duct position.When identical swirl rate, helical intake has higher flow coefficient than tangential air flue.
Desirable gas handling system must have enough inlet flow cross sections and lower strength of vortex when diesel engine runs up, stronger strength of vortex to be arranged when low-speed running, to guarantee all to obtain best air-fuel mixture quality at high and low rotary speed area.
The method that realizes at present adjusting strength of vortex and charge flow rate is mainly that a valve block is set in the ingress of tangential air flue.When diesel engine ran up, valve block was opened fully, kept maximum flow area, inhaled loss so that enough aeration quantity, minimizing pumps to be provided, and can produce suitable strength of vortex, promoted the even mixing of oil gas and more perfect burning.And when the diesel engine low-speed running, valve block is closed fully, by helical intake, provides stronger eddy current, avoided due to eddy current too a little less than, spray penetration causes the phenomenon of burn deterioration from excessive and air-fuel mixture degradation.The aperture of valve block is controlled by the pressure of suction tude, and suction press has reflected the comprehensive function of diesel engine speed and load.
But there is following shortcoming in valve plate-type intake swirl controlling device: 1, the air-flow of tangential air flue and helical intake meeting severe interference affects air inflow; 2, under the low speed operating mode, only helical intake air inlet, air inflow can not meet the demand of burning; 3, can produce vapour lock near valve block and separate with gas, cause the local losses of air inlet to increase.
Summary of the invention
The present invention overcomes the deficiency that prior art exists, technical problem to be solved be to provide a kind of can be to the strength of vortex of the intake duct of diesel engine with direct injection and the intake duct device that charge flow rate is regulated.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: the intake duct device of adjustable eddy current, comprise cylinder head, cross section modulating valve and controlling mechanism, be provided with two air flues independent of each other in cylinder head, article one, be tangential inlet duct, another is spiral inlet duct, position on cylinder head between tangential inlet duct and spiral inlet duct is cut water, the end of described cut water is provided with the cross section modulating valve, the controlling mechanism of controlling its rotation is installed on the modulating valve of cross section, and controlling mechanism is arranged on the cylinder head top.
The structure of described controlling mechanism is: be provided with the tooth bar pull bar between two blocks, and the distance between two blocks is greater than the length of tooth bar pull bar, be engaged with the first gear and the second gear on the tooth bar pull bar, the first gear is connected with the output shaft of motor, the second gear is fixedly connected with an end of screw rod, and the other end of screw rod is fixedly connected with the cross section modulating valve.
The surface of contact of described cross section modulating valve and cylinder head is circumferentially symmetrical arc surface, and the symmetry center of arc surface overlaps with the gyration center of described screw rod.
Described cross section modulating valve is quadrant, and the central shaft of quadrant overlaps with the gyration center of described screw rod.
Described quadrant is that straight line or curve rotate the quadrant that sixth to eight/three weeks form take screw rod as axle center.
The present invention compared with prior art has following beneficial effect.
1, the present invention is provided with the cross section modulating valve in the cut water position of tangential inlet duct and spiral inlet duct formation, change the air inlet cross section of tangential inlet duct and spiral inlet duct by the rotation of controlling the cross section modulating valve, air flue strength of vortex and flow coefficient are regulated, meet the diesel engine intake demand under different operating modes, the vapour lock that can prevent part is simultaneously separated with gas, reduce local losses, effectively reduce the flow losses of air inlet.
2, the present invention is by the movement of motor band carry-over bar pull bar, thereby the drive bolt rotary, control the cross section modulating valve and rotate to both direction, and tooth bar pull bar two ends are provided with the maximum deflection position of stop limits cross section modulating valve in different air flues, simple in structure, easy to operate.
Description of drawings
Be described in further detail below in conjunction with the intake duct device of accompanying drawing to the adjustable eddy current of the present invention.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation that controlling mechanism is controlled the cross section modulating valve.
In figure: 1 is cylinder head, and 2 is tangential inlet duct, and 3 is spiral inlet duct, and 4 is cut water, and 5 is the cross section modulating valve, and 6 is controlling mechanism, and 7 is screw rod, and 8 is the tooth bar pull bar, and 9 is the first gear, and 10 is the second gear, and 11 is motor, and 12 is block.
Embodiment
As shown in Figure 1 and Figure 2, the intake duct device of the adjustable eddy current of the present invention, comprise cylinder head 1, cross section modulating valve 5 and controlling mechanism 6, be provided with two air flues independent of each other in cylinder head 1, article one, be tangential inlet duct 2, another is spiral inlet duct 3, position on cylinder head 1 between tangential inlet duct 2 and spiral inlet duct 3 is cut water 4, the end of described cut water 4 is provided with cross section modulating valve 5, the controlling mechanism 6 of controlling its rotation is installed on cross section modulating valve 5, and controlling mechanism 6 is arranged on cylinder head 1 top.
The structure of described controlling mechanism 6 is: be provided with tooth bar pull bar 8 between two blocks 12, and the distance between two blocks 12 is greater than the length of tooth bar pull bar 8, be engaged with the first gear 9 and the second gear 10 on tooth bar pull bar 8, the first gear 9 is connected with the output shaft of motor 11, the second gear 10 is fixedly connected with an end of screw rod 7, and the other end of screw rod 7 is fixedly connected with cross section modulating valve 5.
Described cross section modulating valve 5 is circumferential symmetrical arc surface with the surface of contact of cylinder head 1, and the symmetry center of arc surface overlaps with the gyration center of described screw rod 7.
Described cross section modulating valve 5 is quadrant, and the central shaft of quadrant overlaps with the gyration center of described screw rod 7.
Described quadrant is that straight line or curve rotate the quadrant that sixth to eight/three weeks form take screw rod 7 as axle center.
Cross section modulating valve 5 is quadrant, described quadrant is that straight line or curve rotate the quadrant that sixth to eight/three weeks form take screw rod 7 as axle center, the central shaft of quadrant overlaps with the gyration center of described screw rod 7, is the most simply to adopt the cylindrical body surface of contact.
Working procedure
Gas is from cut water 4 top shuntings, enter in diesel engine from tangential inlet duct 2 and spiral inlet duct 3, motor 11 forward counter-rotating drive the first gears 9 rotate and control tooth bar pull bar 8 and move left and right, rotate along with the movement of tooth bar pull bar 8 with the second gear 10 and the screw rod fixed thereon 7 of 8 engagements of tooth bar pull bar, because screw rod 7 is fixed on cross section modulating valve 5, therefore can drive cross section modulating valve 5 around screw rod 7 rotations, cross section modulating valve 5 is circumferential symmetrical arc surface with the surface of contact of cylinder head 1, and the symmetry center of arc surface overlaps with the gyration center of described screw rod 7;
When diesel engine operates at high-speed working condition, requirement has enough inlet flow cross sections and lower strength of vortex, at this moment, controlling mechanism 6 is controlled cross section modulating valve 5 to spiral inlet duct 3 rotations, make the tangential inlet duct 2 with higher flow coefficient have larger entrance section long-pending,, to provide enough aeration quantity, minimizing pumps to inhale loss, promote the even mixing of oil gas and more perfect burning;
When diesel engine runs to the low speed operating mode, requirement is strengthened intake swirl meeting under the prerequisite of air inflow, at this moment, controlling mechanism 6 is controlled cross section modulating valve 5 to tangential inlet duct 2 rotations, even can seal tangential inlet duct 2 fully, the sectional area that makes it possible to the spiral inlet duct 3 of the eddy current that provides stronger increases, avoided due to eddy current too a little less than, spray penetration causes the phenomenon of burn deterioration from excessive and air-fuel mixture degradation.
Are constituent elements of tangential inlet duct 2 and spiral inlet duct 3 due to middle section of the present invention modulating valve 5, there is good guide functions on its surface, can not produce vapour lock and separate with gas, can reduce local losses.
The above is explained in detail embodiments of the invention by reference to the accompanying drawings, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skills possess, can also make various variations under the prerequisite that does not break away from aim of the present invention.
Claims (4)
1. the intake duct device of adjustable eddy current, comprise cylinder head (1), cross section modulating valve (5) and controlling mechanism (6), be provided with two air flues independent of each other in cylinder head (1), article one, be tangential inlet duct (2), another is spiral inlet duct (3), position between the upper tangential inlet duct (2) of cylinder head (1) and spiral inlet duct (3) is cut water (4), it is characterized in that: the end of described cut water (4) is provided with cross section modulating valve (5), the controlling mechanism (6) of controlling its rotation is installed on cross section modulating valve (5), controlling mechanism (6) is arranged on cylinder head (1) top,
The structure of described controlling mechanism (6) is: be provided with tooth bar pull bar (8) between two blocks (12), and the distance between two blocks (12) is greater than the length of tooth bar pull bar (8), be engaged with the first gear (9) and the second gear (10) on tooth bar pull bar (8), the first gear (9) is connected with the output shaft of motor (11), the second gear (10) is fixedly connected with an end of screw rod (7), and the other end of screw rod (7) is fixedly connected with cross section modulating valve (5).
2. the intake duct device of adjustable eddy current according to claim 1, it is characterized in that: described cross section modulating valve (5) is circumferentially symmetrical arc surface with the surface of contact of cylinder head (1), and the symmetry center of arc surface overlaps with the gyration center of described screw rod (7).
3. the intake duct device of adjustable eddy current according to claim 1 and 2 is characterized in that: described cross section modulating valve (5) is quadrant, and the central shaft of quadrant overlaps with the gyration center of described screw rod (7).
4. the intake duct device of adjustable eddy current according to claim 3 is characterized in that: described quadrant is that straight line or curve rotate the quadrant that sixth to eight/three weeks form take screw rod (7) as axle center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101143516A CN102619639B (en) | 2012-04-18 | 2012-04-18 | Swirl-regulable air inlet system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101143516A CN102619639B (en) | 2012-04-18 | 2012-04-18 | Swirl-regulable air inlet system |
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| Publication Number | Publication Date |
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| CN102619639A CN102619639A (en) | 2012-08-01 |
| CN102619639B true CN102619639B (en) | 2013-11-20 |
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| CN2012101143516A Active CN102619639B (en) | 2012-04-18 | 2012-04-18 | Swirl-regulable air inlet system |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884508B (en) * | 2014-01-27 | 2016-04-06 | 中国北方发动机研究所(天津) | A kind of device realizing the test of opposed two-stroke cylinder sleeve air-flow |
| CN104033237B (en) * | 2014-06-19 | 2016-08-24 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | A kind of multivalve engine variable vortex air intake duct |
| JP2016217239A (en) * | 2015-05-20 | 2016-12-22 | トヨタ自動車株式会社 | Internal combustion engine |
| JP2016217244A (en) * | 2015-05-20 | 2016-12-22 | トヨタ自動車株式会社 | Internal combustion engine |
| CN107461266A (en) * | 2017-07-07 | 2017-12-12 | 吉林大学 | Natural gas engine variable cross-section air intake duct gas-separating valve |
| CN107269416A (en) * | 2017-07-10 | 2017-10-20 | 河南柴油机重工有限责任公司 | A kind of Design of High Pressure Common Rail Diesel Engine cylinder head |
| CN111140678B (en) * | 2020-04-07 | 2020-08-21 | 潍柴动力股份有限公司 | Vortex ratio adjusting device suitable for single cylinder engine test |
| CN111823556B (en) * | 2020-06-12 | 2021-11-19 | 盐城支点机械制造有限公司 | Valve capable of being precisely adjusted |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS61319A (en) * | 1984-06-12 | 1986-01-06 | 豊田メデイカル株式会社 | Cleaning machine |
| JPH061319A (en) * | 1992-06-16 | 1994-01-11 | Nippon Steel Kk | Continuously wrapping device for wrapping shirts and method of continuously wrapping shirts by using the same device |
| US5429086A (en) * | 1994-02-14 | 1995-07-04 | Cummins Engine Company, Inc. | Shared runner intake ports for I.C. engine |
| JPH10339150A (en) * | 1997-06-10 | 1998-12-22 | Nissan Motor Co Ltd | Diesel engine intake device |
| AT5648U1 (en) * | 2001-08-02 | 2002-09-25 | Avl List Gmbh | INTERNAL COMBUSTION ENGINE WITH AT LEAST TWO INLET VALVES PER CYLINDER |
| CN2903431Y (en) * | 2006-01-24 | 2007-05-23 | 潍柴动力股份有限公司 | Cylinder head |
| CN2913638Y (en) * | 2006-07-06 | 2007-06-20 | 广西玉柴机器股份有限公司 | Single-cylinder four-spiracle diesel engine air flue |
| CN2934607Y (en) * | 2006-07-06 | 2007-08-15 | 广西玉柴机器股份有限公司 | Four-air valve four-cylinder diesel engine air passage |
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