CN1395028A - Direct injection diesel engine premixed combustion method and its device - Google Patents
Direct injection diesel engine premixed combustion method and its device Download PDFInfo
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- CN1395028A CN1395028A CN02113010A CN02113010A CN1395028A CN 1395028 A CN1395028 A CN 1395028A CN 02113010 A CN02113010 A CN 02113010A CN 02113010 A CN02113010 A CN 02113010A CN 1395028 A CN1395028 A CN 1395028A
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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
Abstract
The present invention utilizes the reasonal collision of oil beam jetted by high-pressure oil sprayer with surface of combustion chamber to form fuel oil and air several mixed modes and obviously raise oil-air mixed rate so as to implement premixed combustion of directly-jetted diesel engine. The equipment for implementing said invented method is characterized by that the interior of combustion chamber is equipped with a ring-shaped column body, and the outer side of said ring-shaped column body is external annular combustion chamber, and its inside is central combustion chamber. The oil-jet nozzle has several oil jet holes, and the centre line of oil jet nozzle and the centre line of combustion chamber are coincided, and the included angle of elongation line of axis of oil jet hole and centre line of oil jet nozzle is 60-75 deg.
Description
Technical field
Field of internal combustion engine under the present invention is a kind of direct injection diesel engine premixed combustion method and device specifically.
Background technique
Along with the require increasingly stringent of countries in the world, face the challenge of low emission as the diesel engine with direct injection of vehicle major impetus to vehicular discharge.Traditional direct spray type diesel burning systems is by high pressure fuel injector diesel oil to be sprayed into the firing chamber, air effect realizes spraying mixed combustion in fuel spray that forms and the firing chamber, this combustion manner is based on the diffusive combustion form, oil bundle CONCENTRATION DISTRIBUTION is very inhomogeneous, combustion temperature is very high, thereby causes a large amount of generations of soot and nitrogen oxide noxious emission.Recently, the internal-combustion engine researcher has proposed the even pre-mixing combustion of a kind of diesel engine (HCCI) theory, make diesel oil and air form premixed gas earlier in the firing chamber, and then catch fire, burn, theoretical and experiment shows that this burning form can significantly reduce noxious emissions such as soot and nitrogen oxide.U.S. Patent number US5467757, " compression ignition engine and combustion manner thereof (Compression-ignition typeengine and combustion method of same) ", employing sprays into firing chamber and air mixing formation premixed gas at diesel engine compression stroke budc 60CA in advance with diesel oil, the recompression burning can obviously improve soot and NO under certain condition
xDischarging, but mixed gas ignition time and rate of burning are difficult to control, when the diesel engine high load, easily produce pinking and make burn deterioration; SAE paper No.892068, exercise question " homogeneous charge compression ignition engine (Homogeneous-Charge CompressionIgnition (HCCI) Engines) ", propose to adopt the exhaust gas recirculation method to control the diesel engine premixed combustion process, comprise the initial point that catches fire, rate of burning etc., but do not provide concrete controlling method; U.S. Patent number US2002026926, " the homogeneous charge compression ignition formula motor (Premixed charge compression ignition enginewith optimal combustion control) that has the burning optimization control gear ", a kind of electronic control system is provided, the combustion process that control diesel engine diesel oil-air pre-mixing is closed gas, comprise the ignition time of burning, rate of burning, internal pressure of combustion chamber, temperature etc., but the control system complexity, the expense height.
Summary of the invention
The purpose of this invention is to provide a kind of direct injection diesel engine premixed combustion method and device, can realize controlling and catch fire regularly and the premixed combustion process of rate of burning, reduce soot and NO in the products of combustion
xNoxious emission improves diesel combustion efficient simultaneously.
The objective of the invention is to realize by following technical solution:
The inventive method is characterised in that the oil beam jetted that utilizes high pressure fuel injector and the reasonable collision of combustor surface, forms the multiple hybrid mode of fuel oil and air, significantly improves the oil gas mixing rate, the pre-mixing combustion of realization diesel engine with direct injection.
Technique device of the present invention comprises cylinder, cylinder head, is installed in oil sprayer, piston and firing chamber on the cylinder head, it is characterized in that described firing chamber is provided with circular cylinder, and the circular cylinder outside is outside annular combustion chamber, and the inboard is a central combustion chamber.The oil nozzle of oil sprayer has a plurality of nozzle openings, the center line of oil nozzle and firing chamber central lines, and the angle of nozzle opening axis elongation line and oil nozzle center line is 60 °-75 °.The cross section of circular cylinder is a circular section, and the height of circular cylinder is the 2/3-3/4 of whole firing chamber height.Central combustion chamber is an inverted curved surface solid of rotation, can be arc surface solid of rotation, parabolic solid of rotation or cone.Piston-top surface and cylinder head lower plane constitute the whole bags.Whole firing chamber is the cylinder centerline symmetry.
The present invention compared with prior art has following advantage:
Owing to utilize the reasonable collision of oil beam jetted and the combustor surface of oil sprayer, can form fuel oil and splash that broken atomizing mixes, the fuel film vaporization mixing.Utilize air swirl and turbulent flow in the firing chamber to increase the oil gas mixing rate, because multiple hybrid mode is also deposited, the oil gas mixing rate significantly increases, make the premixed gas formation time extremely short, like this, the ignition time of premixed gas and rate of burning can regularly be controlled by fuel injection, have solved owing to diesel oil sprays into ignition time and the unmanageable problem of rate of burning that the firing chamber exists too early.Therefore the present invention can successfully realize diesel engine premixed combustion.In addition,, can make air fuel ratio be controlled at 0.6-0.8, realize lean combustion, significantly reduce soot and NO because premixed gas forms the speed height
xNoxious emission improves diesel combustion efficient.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the structural representation of embodiments of the invention.The outside annular combustion chamber of 1 oil sprayer, 2 cylinder head 3 firing chambers, 4 piston 5 piston rings, 6 cylinder 7 oil nozzles, 8 nozzle openings 9 10 central combustion chamber 11 circular cylinders
Mode of execution
In Fig. 1, combustion system of directly jetting diesel engine of the present invention comprises: oil sprayer 1, cylinder head 2, firing chamber 3, piston 4, piston ring 5, cylinder 6.In Fig. 2, the bags of the present invention is divided into outside annular combustion chamber 9 and central combustion chamber's 10 two-part, and the two is separated by circular cylinder 11, and circular cylinder 11 highly is the 2/3-3/4 of whole firing chamber height.The shape of cross section of circular cylinder 11 is a circular arc.Circular cylinder 11 surfaces and outside annular combustion chamber 9 and 10 smooth connections of central combustion chamber.Central combustion chamber 10 is inverted curved surface solid of rotation, also can be arc surface solid of rotation, parabolic solid of rotation or cone.Above the center, firing chamber oil nozzle 7 and nozzle opening 8.The number of nozzle opening 8 is more than 4.Nozzle opening 8 is evenly distributed on the conical surface of oil nozzle 7.Must guarantee that from the oil bundle center line of oil nozzle 7 ejections and the angle of oil nozzle 7 center lines the oil bundle is ejected on the surface of circular cylinder 11, this angle is 60 °-75 °.
In diesel engine combustion device of the present invention, produce collision from the fuel oil bundle and circular cylinder 11 surfaces of oil sprayer 1 ejection, after the collision, fuel oil is divided into three parts: a part of fuel oil bundle is because collision produces the outside annular combustion chamber 9 that broken formed drop is splashed to the firing chamber, forms mixed gas with herein air mixing; A part is splashed to the central combustion chamber 10 of firing chamber, under the air movement effect, mixes with air in central chamber, forms mixed gas; A part of in addition circular cylinder 11 surfaces in collision place form one deck oil films, and oil film is subjected to thermal evaporation on the one hand from the teeth outwards, and externally doughnut 9 and central chamber's 10 interior strong air movement effects form premixed gas down rapidly simultaneously.Like this, oil beam jetted forms the multiple hybrid mode with air after collision, significantly improved diesel oil and Air mixing speed, has realized diesel engine premixed combustion, has solved the problem of catch fire timing and rate of burning, has reduced soot and NO effectively
xDischarging generate, improved Combustion in Direct Injection Diesel Engine efficient.
Claims (6)
1. a direct injection diesel engine premixed combustion method is characterized in that utilizing from the fuel oil bundle of oil sprayer injection and the reasonable collision of combustor surface, forms multiple oil-gas hybrid mode, realizes direct injection diesel engine premixed combustion.
2. direct injection diesel engine premixed combustion device, comprise cylinder (6), cylinder head (2) and oil sprayer (1) mounted thereto, piston (4) and firing chamber (3), it is characterized in that described firing chamber (3) is provided with circular cylinder (11), circular cylinder (11) outside is outside annular combustion chamber (9), the inboard is central combustion chamber (10), outside annular combustion chamber (9) and central combustion chamber (10) and smooth connection of circular cylinder (11).
3. direct injection diesel engine premixed combustion device according to claim 2, the oil nozzle (2) that it is characterized in that described oil sprayer (1) has a plurality of nozzle openings (8), the center line of oil nozzle (7) and firing chamber (3) central lines, the angle of nozzle opening (8) axis elongation line and oil nozzle (7) center line is 60 °-75 °.
4. direct injection diesel engine premixed combustion device according to claim 2, the cross section that it is characterized in that described circular cylinder (11) is a circular section.
5. direct injection diesel engine premixed combustion device according to claim 2, the height that it is characterized in that described circular cylinder (11) are the 2/3-3/4 of whole firing chamber (3) height.
6. direct injection diesel engine premixed combustion device according to claim 2 is characterized in that described central combustion chamber (10) is an inverted curved surface solid of rotation, can be arc surface solid of rotation, parabolic solid of rotation or cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021130108A CN1212471C (en) | 2002-05-15 | 2002-05-15 | Direct injection diesel engine premixed combustion method and its device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021130108A CN1212471C (en) | 2002-05-15 | 2002-05-15 | Direct injection diesel engine premixed combustion method and its device |
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| CN1395028A true CN1395028A (en) | 2003-02-05 |
| CN1212471C CN1212471C (en) | 2005-07-27 |
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| CNB021130108A Expired - Fee Related CN1212471C (en) | 2002-05-15 | 2002-05-15 | Direct injection diesel engine premixed combustion method and its device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458114C (en) * | 2004-02-26 | 2009-02-04 | 上海交通大学 | Discontinuous bamboo hat shape fuel oil spray forming device |
| CN103590889A (en) * | 2013-10-30 | 2014-02-19 | 清华大学 | Combustion system and combustion method for two-stage pre-mixing compression ignition of gasoline direct injection engine |
| CN103670661A (en) * | 2012-09-14 | 2014-03-26 | 斗山英维高株式会社 | Combustion chamber of direct injection diesel engine for reducing the nox |
| CN103835803A (en) * | 2014-02-24 | 2014-06-04 | 大连理工大学 | Collision shunt combustion chamber of diesel engine |
| CN104781518A (en) * | 2012-10-30 | 2015-07-15 | 斗山英维高株式会社 | Combustion chamber of direct injection diesel engine having inducers |
| CN108915914A (en) * | 2018-06-20 | 2018-11-30 | 柳州五菱柳机动力有限公司 | A kind of natural aspiration gasoline engine Atkinson cycle implementation method |
-
2002
- 2002-05-15 CN CNB021130108A patent/CN1212471C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100458114C (en) * | 2004-02-26 | 2009-02-04 | 上海交通大学 | Discontinuous bamboo hat shape fuel oil spray forming device |
| CN103670661A (en) * | 2012-09-14 | 2014-03-26 | 斗山英维高株式会社 | Combustion chamber of direct injection diesel engine for reducing the nox |
| US9284877B2 (en) | 2012-09-14 | 2016-03-15 | Doosan Infracore Co., Ltd. | Combustion chamber of direct injection diesel engine for reducing the NOx |
| CN104781518A (en) * | 2012-10-30 | 2015-07-15 | 斗山英维高株式会社 | Combustion chamber of direct injection diesel engine having inducers |
| CN103590889A (en) * | 2013-10-30 | 2014-02-19 | 清华大学 | Combustion system and combustion method for two-stage pre-mixing compression ignition of gasoline direct injection engine |
| CN103590889B (en) * | 2013-10-30 | 2016-06-15 | 清华大学 | A kind of combustion system for two sections of Premixed combustion of directly jetting gasoline engine and combustion method |
| CN103835803A (en) * | 2014-02-24 | 2014-06-04 | 大连理工大学 | Collision shunt combustion chamber of diesel engine |
| CN103835803B (en) * | 2014-02-24 | 2016-02-24 | 大连理工大学 | Diesel engine collision shunting combustion room |
| CN108915914A (en) * | 2018-06-20 | 2018-11-30 | 柳州五菱柳机动力有限公司 | A kind of natural aspiration gasoline engine Atkinson cycle implementation method |
| CN108915914B (en) * | 2018-06-20 | 2021-05-11 | 柳州五菱柳机动力有限公司 | Atkinson cycle implementation method for natural aspiration gasoline engine |
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| Publication number | Publication date |
|---|---|
| CN1212471C (en) | 2005-07-27 |
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