CN100410508C - Combustion system of compressed ignition gaseous propellant engine and composite air supply method thereof - Google Patents
Combustion system of compressed ignition gaseous propellant engine and composite air supply method thereof Download PDFInfo
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- CN100410508C CN100410508C CNB2004100727258A CN200410072725A CN100410508C CN 100410508 C CN100410508 C CN 100410508C CN B2004100727258 A CNB2004100727258 A CN B2004100727258A CN 200410072725 A CN200410072725 A CN 200410072725A CN 100410508 C CN100410508 C CN 100410508C
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- propellant engine
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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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- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The present invention discloses a combustion system of a compressed ignition gaseous propellant engine and a composite gas supply method thereof controlling the opening time and the sustained jetting time of a high-pressure jetting valve and a low-pressure jetting valve by an electronic control unit. The combustion system of a compressed ignition gaseous propellant engine comprises a cylinder cover, a working piston, a gas inlet pipe and a main combustion chamber positioned between a piston head and the cylinder cover, wherein the cylinder cover is provided with a separation auxiliary combustion chamber; the lower part of the auxiliary combustion chamber is provided with a channel communicated with the main combustion chamber, the side is provided with a heater plug, and the upper part is provided with a high-pressure gas jetting valve controlled by the electronic control unit. The gas inlet pipe is provided with a low pressure gas jetting valve controlled by the electronic control unit. The present invention has simple structure and does not need to install a gas injection valve between the main combustion chamber and the auxiliary combustion chamber; the auxiliary heating of the heater plug is utilized to realize the compression ignition, which largely increases the compression ratio and realizes the lean mixture combustion. Thereby, the heat efficiency is increased, and the fuel consumption rate is reduced.
Description
Technical field
The present invention relates to a kind of combustion system of working piston formula internal-combustion engine, particularly a kind of combustion system of compressed ignition gaseous propellant engine, and a kind of composite air supply method that is used for above-mentioned combustion system with subsidiary combustion chamber.
Background technique
Present gaseous propellant engine mainly adopts spark ignition combustion mode, and this combustion manner is because compression ratio is low, and intake efficiency is low, so less economical.The ignition by compression mode has compression ratio and the intake efficiency higher than spark ignition mode, so better economic is arranged.But the general kindling temperature height of the gaseous fuel of internal-combustion engine is difficult to compression autoignition, and under high compression ratio, premixed conditions easy engine knock.For this reason, the people of related domain have begun to separating the research of cell-type combustion system of compressed ignition gaseous propellant engine, to overcome these technological deficiencies.
Up to now, the report of the internal-combustion engine of relevant band subsidiary combustion chamber is a lot, the disclosed a kind of band subsidiary combustion chamber fuel injection type internal combustion engine of Chinese patent ZL98108338.2 for example, this internal-combustion engine subsidiary combustion chamber is connected with main combustion chamber, for finishing igniting process in the subsidiary combustion chamber, this internal-combustion engine be provided with the pressure accumulating chamber adjacent with subsidiary combustion chamber, with fuel spray into pressure accumulating chamber Fuelinjection nozzle, be communicated with the air valve that mixes of pressure accumulating chamber and subsidiary combustion chamber and spark ignition plug.Above-mentioned mixed air valve is injected into subsidiary combustion chamber with fuel and compressed-air actuated mixed gas, by the igniter plug in the subsidiary combustion chamber mixed air is lighted.Its deficiency is to be provided with pressure accumulating chamber and to mix air valve, makes its complex structure; And the employing of spark ignition mode, its compression ratio and the thermal efficiency are decreased, increased the consumption rate of fuel.
Summary of the invention
The objective of the invention is to overcome the deficiency that complex structure in the prior art, compression ratio and the thermal efficiency are low, specific fuel consumption is high, provide a kind of simple in structure, adopt between ignition by compression mode, major and minor firing chamber and need not to be provided with jet valve, can increase substantially compression ratio, realize lean combustion, improve the thermal efficiency, reduce specific fuel consumption, and be applicable to single place of gas engine fuel.Combustion system of compressed ignition gaseous propellant engine and composite air supply method thereof.
In order to solve the problems of the technologies described above, purpose of the present invention can realize by following technological scheme:
Combustion system of compressed ignition gaseous propellant engine of the present invention comprises cylinder head, working piston, air intake branch and the main combustion chamber between working piston top and cylinder head; Described cylinder head is provided with the separated type subsidiary combustion chamber; Described subsidiary combustion chamber bottom is provided with the passage that links to each other with main combustion chamber, and sidepiece is provided with glow plug, and top is provided with the spraying high-pressure gas valve of ECU (Electrical Control Unit) control; Described air intake branch is provided with the low-pressure gas injection valve of ECU (Electrical Control Unit) control.
Composite air supply method of the present invention is summarized as follows:
The low-pressure gas injection valve is gas jet fuel in the engine charge stroke, forms thin mixed air with air mixing; In the engine compresses stroke, working piston is during near top dead center, and the spraying high-pressure gas valve is gas jet fuel in subsidiary combustion chamber, forms the dense mixed air that is easy to catch fire in subsidiary combustion chamber; Combustion-supporting down at glow plug, when closing on working piston near top dead center, the dense mixed air of compressing ignition subsidiary combustion chamber; The gas of subsidiary combustion chamber internal combustion sprays into main combustion chamber through the passage that main combustion chamber is connected with subsidiary combustion chamber, lights the thin mixed air in the main combustion chamber subsequently, finishes expansion acting process.
Compared with prior art, the present invention adopts separated type subsidiary combustion chamber and high-pressure injection valve, in subsidiary combustion chamber, form the dense mixed air that is easy to light, utilize the glow plug assistant heating to realize compressing ignition, the mixed gas of burning sprays into main combustion chamber by the passage that connects major and minor firing chamber, adopts simple passage between major and minor firing chamber, need not to be provided with complicated jet valve and pressure accumulating chamber, because design is more reasonable, its structure is more simple; Adopt the glow plug assistant heating to realize compressing ignition, increased substantially compression ratio, and realized lean combustion, thereby improved the thermal efficiency, reduced specific fuel consumption; Adopted the composite air supply method that is suitable for mutually with it simultaneously, thus in use freely convenient.
Description of drawings
Fig. 1 is a combustion system of compressed ignition gaseous propellant engine structural representation of the present invention;
Fig. 2 is the local figure of subsidiary combustion chamber of the present invention;
Fig. 3 is the local figure that inserts of the present invention;
Fig. 4 is a working piston guiding gutter partial enlarged drawing of the present invention.
Reference character:
1. ECU (Electrical Control Unit) 2. low-pressure gas injection valves 3. cylinder head 4. spraying high-pressure gas valves
5. glow plug 6. thermal-protective coatings 7. main combustion chambers 8. subsidiary combustion chamber
9. 10. working pistons, 11. passages, 12. suction tude of inserting
13. guiding gutter
Embodiment
Below in conjunction with accompanying drawing invention is described in detail:
In the drawings, the single alternative fuel engine chamber of ignition by compression comprises cylinder head 3, working piston 10, suction tude 12 and the main combustion chamber 7 between working piston top and cylinder head; The guiding gutter 13 that described piston 10 tops are provided with, guiding gutter 13 is positioned at piston head, and guiding is lighted the rarefied air in the main combustion chamber from the combustion gas that subsidiary combustion chamber ejects.Described cylinder head 3 is provided with separated type subsidiary combustion chamber 8, and subsidiary combustion chamber 8 is a spherical swirl chamber, and volume ratio is selected in 30%～40% best results, and compression ratio is 20～22; The subsidiary combustion chamber internal surface scribbles high temperature insulating layer 6, for example zirconium oxide, silicon nitride, and thickness is 0.2mm～0.6mm; Subsidiary combustion chamber 8 bottoms are provided with the passage 11 that links to each other with main combustion chamber 7, the size and the direction of passage have considerable influence to combustion effects, cross-sectional area is chosen in 100～150 square millimeters, its axis and horizontal sextant angle are selected in 40～60 degree best results, passage 11 can be arranged on and directly get through major and minor firing chamber in the cylinder head, also can be arranged on to insert on 9; Inserting 9 is constituent elements of subsidiary combustion chamber, and its hemisphere portion is grouped into the Lower Half of subsidiary combustion chamber, helps the air-flow that the direct high pressure snifting valve sprays into and enters subsidiary combustion chamber smooth-goingly, and rapid mixing forms dense mixed air; Groove is cut in 9 outsides of inserting one, and depth of groove is 0.5mm～2.5mm, put into subsidiary combustion chamber after, form air blanketing one, thereby reduce heat dissipation; Subsidiary combustion chamber 8 sidepieces are provided with glow plug 5, and glow plug 5 is ignition by compression ceramic electric heating plug; Subsidiary combustion chamber 8 tops are provided with the spraying high-pressure gas valve 4 of ECU (Electrical Control Unit) 1 control; Suction tude 12 is provided with the low-pressure gas injection valve 2 of ECU (Electrical Control Unit) 1 control.
Below composite air supply method of the present invention is further described:
At engine charge stroke mesolow gas spray valve 1 gas jet fuel, form thin mixed air with air mixing; In the engine compresses stroke, working piston 10 is during near top dead center, and spraying high-pressure gas valve 4 is gas jet fuel in subsidiary combustion chamber 8, forms the dense mixed air that is easy to catch fire in subsidiary combustion chamber 8; Combustion-supporting following at glow plug 5, the dense mixed air of compressing ignition subsidiary combustion chamber 8 when closing on working piston 10 top dead centers; The gas of subsidiary combustion chamber 8 internal combustion sprays into main combustion chamber through the passage 11 that main combustion chamber 7 is connected with subsidiary combustion chamber 8, lights the thin mixed air in the main combustion chamber subsequently, finishes expansion acting process.
High-pressure injection valve jet pressure is 6～12Mpa, injection timing before compression top center 40～20 ℃; Low-pressure fuel injection valve jet pressure is 0.4Mpa, and injection timing is 10～20 ℃ of air inlet atdc.
The present invention is applicable to that the cylinder diameter scope is from multi-purpose motors such as automobile-used, the generating of 95mm～200mm and oil recoveries.
More than be schematically to the description of the present invention and mode of execution thereof, do not have restricted.So, if those of ordinary skill in the art is enlightened by it, under the situation that does not break away from the invention aim, make other embodiment, all should belong to protection scope of the present invention.
Claims (7)
1. a combustion system of compressed ignition gaseous propellant engine comprises cylinder head, working piston, suction tude and the main combustion chamber between piston head and cylinder head, it is characterized in that described cylinder head is provided with the separated type subsidiary combustion chamber; Described subsidiary combustion chamber is a spherical swirl chamber, the bottom is provided with the passage that links to each other with main combustion chamber, and the axis of passage and horizontal sextant angle are the 40-60 degree, section area 100-150 square millimeter, sidepiece is provided with glow plug, and top is provided with the spraying high-pressure gas valve of ECU (Electrical Control Unit) control; Described suction tude is provided with the low-pressure gas injection valve of ECU (Electrical Control Unit) control.
2. combustion system of compressed ignition gaseous propellant engine according to claim 1 is characterized in that, described glow plug is an ignition by compression ceramic electric heating plug.
3. combustion system of compressed ignition gaseous propellant engine according to claim 1 is characterized in that, described working piston top is provided with guiding gutter.
4. combustion system of compressed ignition gaseous propellant engine according to claim 1 is characterized in that, described subsidiary combustion chamber internal surface scribbles the high temperature insulating layer, and thickness is 0.2mm～0.6mm.
5. combustion system of compressed ignition gaseous propellant engine according to claim 1 is characterized in that described passage is arranged in the cylinder head.
6. combustion system of compressed ignition gaseous propellant engine according to claim 1 is characterized in that, on the constituent element that described passage is located at subsidiary combustion chamber was inserted, the outside of inserting was provided with groove one.
7. composite air supply method that adopts the described combustion system of compressed ignition gaseous propellant engine of claim 1, its job step is as follows:
(1) low-pressure gas injection valve gas jet fuel in the engine charge stroke forms thin mixed air with air mixing;
(2) in the engine compresses stroke, working piston is during near top dead center, and the spraying high-pressure gas valve is gas jet fuel in subsidiary combustion chamber, forms the dense mixed air that is easy to catch fire in subsidiary combustion chamber;
(3) combustion-supporting down at glow plug, at the dense mixed air of working piston compressing ignition subsidiary combustion chamber during near top dead center;
(4) gas of subsidiary combustion chamber internal combustion sprays into main combustion chamber through the passage that main combustion chamber is connected with subsidiary combustion chamber, lights the thin mixed air in the main combustion chamber subsequently, finishes expansion acting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100727258A CN100410508C (en) | 2004-11-16 | 2004-11-16 | Combustion system of compressed ignition gaseous propellant engine and composite air supply method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100727258A CN100410508C (en) | 2004-11-16 | 2004-11-16 | Combustion system of compressed ignition gaseous propellant engine and composite air supply method thereof |
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| CN1605727A CN1605727A (en) | 2005-04-13 |
| CN100410508C true CN100410508C (en) | 2008-08-13 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005050435B4 (en) * | 2005-10-19 | 2011-04-14 | Man Diesel & Turbo Se | Gas engine and ignition device for a gas engine |
| CN101858245A (en) * | 2010-04-28 | 2010-10-13 | 大连理工大学 | Combustion system of large gas fuel engine |
| CN102425484A (en) * | 2011-11-04 | 2012-04-25 | 天津理工大学 | Method for improving natural gas engine compression ignition performance by adopting injection valve |
| CN102425483B (en) * | 2011-11-04 | 2013-04-17 | 天津理工大学 | Method for improving natural gas engine compression ignition performance by adopting oxidizer |
| DE102014220343A1 (en) * | 2014-10-08 | 2016-04-14 | Ford Global Technologies, Llc | Cylinder head for a diesel engine with direct injection |
| CN105569905B (en) * | 2016-03-07 | 2018-04-13 | 吉林大学 | A kind of cycle of engine ignition energy saving device and engine and its circulation ignition method |
| CN108730015B (en) * | 2018-05-22 | 2020-03-06 | 上海交通大学 | Engine with auxiliary combustion chamber |
| CN113062795A (en) * | 2020-01-02 | 2021-07-02 | 广州汽车集团股份有限公司 | Pre-combustion chamber fuel supply system and engine |
| CN111997793A (en) * | 2020-09-08 | 2020-11-27 | 天津大学 | Flame multistage accelerating device and method for gas fuel engine |
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| US3543736A (en) * | 1967-11-18 | 1970-12-01 | Toyoda Chuo Kenkyusho Kk | Internal combustion engine with subcombustion chamber |
| US3933134A (en) * | 1973-10-11 | 1976-01-20 | Honda Giken Kogyo Kabushiki Kaisha | Method and apparatus using proportional residual gas storage to reduce NOx emissions from internal combustion engines |
| US4616611A (en) * | 1984-10-16 | 1986-10-14 | Ngk Insulators, Ltd. | Precombustion chamber construction of internal combustion engine |
| US4998517A (en) * | 1988-07-21 | 1991-03-12 | Isuzu Motors | Heat insulating engine |
| CN2234506Y (en) * | 1995-05-24 | 1996-09-04 | 甘肃农大机电工程研究所 | Highland diesel engine |
| CN1131228A (en) * | 1995-03-10 | 1996-09-18 | 大连海事大学 | Combustion system of internal combustion engine with two combustion chambers |
| CN1200438A (en) * | 1997-05-23 | 1998-12-02 | 本田技研工业株式会社 | Fuel injection internal combustion engine with sub-combustion chamber |
| CN2460879Y (en) * | 2000-07-03 | 2001-11-21 | 严信本 | flat bell-jar type vortex combustion chamber |
| CN2464944Y (en) * | 2001-02-27 | 2001-12-12 | 山东巨菱股份有限公司 | Vortex diesel engine |
| CN1453462A (en) * | 2002-04-23 | 2003-11-05 | 曼·B及W柴油机公开股份有限公司 | Self-igniting, mixed compressing internal combustion engine and its operating method |
-
2004
- 2004-11-16 CN CNB2004100727258A patent/CN100410508C/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3543736A (en) * | 1967-11-18 | 1970-12-01 | Toyoda Chuo Kenkyusho Kk | Internal combustion engine with subcombustion chamber |
| US3933134A (en) * | 1973-10-11 | 1976-01-20 | Honda Giken Kogyo Kabushiki Kaisha | Method and apparatus using proportional residual gas storage to reduce NOx emissions from internal combustion engines |
| US4616611A (en) * | 1984-10-16 | 1986-10-14 | Ngk Insulators, Ltd. | Precombustion chamber construction of internal combustion engine |
| US4998517A (en) * | 1988-07-21 | 1991-03-12 | Isuzu Motors | Heat insulating engine |
| CN1131228A (en) * | 1995-03-10 | 1996-09-18 | 大连海事大学 | Combustion system of internal combustion engine with two combustion chambers |
| CN2234506Y (en) * | 1995-05-24 | 1996-09-04 | 甘肃农大机电工程研究所 | Highland diesel engine |
| CN1200438A (en) * | 1997-05-23 | 1998-12-02 | 本田技研工业株式会社 | Fuel injection internal combustion engine with sub-combustion chamber |
| CN2460879Y (en) * | 2000-07-03 | 2001-11-21 | 严信本 | flat bell-jar type vortex combustion chamber |
| CN2464944Y (en) * | 2001-02-27 | 2001-12-12 | 山东巨菱股份有限公司 | Vortex diesel engine |
| CN1453462A (en) * | 2002-04-23 | 2003-11-05 | 曼·B及W柴油机公开股份有限公司 | Self-igniting, mixed compressing internal combustion engine and its operating method |
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| CN1605727A (en) | 2005-04-13 |
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Granted publication date: 20080813 Termination date: 20101116 |