CN1272539C - Dimethyl ether engine efficient, ultra-low emission combustion system - Google Patents
Dimethyl ether engine efficient, ultra-low emission combustion system Download PDFInfo
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- CN1272539C CN1272539C CNB031295509A CN03129550A CN1272539C CN 1272539 C CN1272539 C CN 1272539C CN B031295509 A CNB031295509 A CN B031295509A CN 03129550 A CN03129550 A CN 03129550A CN 1272539 C CN1272539 C CN 1272539C
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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 relates to a dimethyl ether engine efficient and ultra-low discharge emission combustion system which belongs to the field of internal-combustion engines. A DME storage tank of the present invention is connected with a low-pressure fuel transport pump through a liquid outlet valve. An outlet of the low-pressure fuel transport pump is connected with a fuel filter and a forced fuel emission pump by one end of a three-way joint. An outlet of the forced fuel emission pump is connected with an ultra-multiple orifice fuel emission device through a high-pressure fuel pipe; the ultra-multiple orifice fuel emission device is arranged on a cylinder cover of an engine and is matched with a combustion chamber. An outlet of a waste gas recirculation control valve is connected with an inlet of a waste gas recirculation cooler; an inlet of a waste gas recirculation control valve is connected with an exhaust pipe; an outlet of a waste gas recirculation cooler is connected with a gas inlet pipe through a pipeline. A fuel return pipe of the fuel emission device is connected through the fuel return three-way joint, and is connected with a pressure control valve through a one-way valve. An outlet of the pressure control valve is connected with the DME storage tank through a reflux valve. A liquid filling valve is arranged on the DME storage tank. The present invention can largely reduce NOx discharge of the engine, can enhance thermal efficiency, and can finally achieve the high efficiency and the ultra-low discharge of a dimethyl ether fuel engine.
Description
Technical field
What the present invention relates to is a kind of dimethyl ether engine combustion system, and particularly a kind of dimethyl ether engine is efficient, the minimum discharge combustion system, belongs to field of internal combustion engine.
Background technique
Compression ignition engine is subjected to people's great attention as the highest vehicular engine of the thermal efficiency always.Through several generations' effort, the traditional combustion system has developed fairly perfectly.But the Abgasgesetz of the fluctuation of the deficiency of world petroleum resource, oil price and various countries was severe day by day in recent years, and the substitute fuel and the low emissions combustion of diesel engine have been researched and proposed new challenge.The dimethyl ether fuel that can make from coal, rock gas, living beings is emerging in recent years alternative motor fuels.The dimethyl ether normal temperature and pressure is gaseous state, the rerum natura similar to liquefied petroleum gas (LPG) down.Particularly the cetane number of dimethyl ether can be suitable for compression ignition engine greater than 55.
Both at home and abroad about dimethyl ether as the technology of compression ignition engine substitute fuel mostly be on conventional diesel engine through the part repacking of oil-fired system, carry out dimethyl ether fuel substituting to diesel oil.Through retrieval to existing technology, find document: " Engine Performance and Exhaust Characteristics ofDirect-injection Diesel Engine Operated with DME ", SAE972973, S.Kajitani, Ibaraki University (engine performance and emission performance during the diesel engine with direct injection dimethyl ether fuel, the SAE paper, numbering: SAE Paper 972973), when this article has been introduced diesel engine with direct injection and has been used dimethyl ether as fuel, adopt the combustion system and the injection system of former motor, injection system mainly is made of Bosch type jerk fuel injection pump and 4 hole oil nozzles; Because low, the easy vaporization of dimethyl ether boiling point, can cause injection system generation vapour lock and motor can not be run well, adopt high-pressure nitrogen bottle to the pressurization of low pressure line dimethyl ether, guarantee that dimethyl ether fuel is for liquid in the injection system, this mode is unsuitable for the application of actual motor vehicle.In addition, there is nitrogen oxide (NO in the cylinder internal spraying combustion manner that this technology adopts
X) discharging is high, is equivalent to the level of former diesel engine, therefore need adopt an effective measure and further reduce the NO of dimethyl ether engine
XDischarging makes the dimethyl ether engine emission performance meet severe day by day Abgasgesetz.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art and defective, provide a kind of dimethyl ether engine efficient, minimum discharge combustion system, make it utilize the low characteristics that are easy to vaporize of dimethyl ether fuel boiling point, adopt double-deck spray orifice oil nozzle, reinforced Injection Pump, dell reentrant combustion chamber, cooled exhaust air recirculating technique and significantly postpone fuel injection measure etc., before catching fire, form quasi-homogenous mixture, realize the low temperature compression ignition combustion, have ultralow NO
XThe advantage of discharging and high thermal efficiency, NO when solving direct spray type compression ignition engine dimethyl ether fuel fuel
XThe discharging problem of higher.
The present invention is achieved by the following technical solutions, the present invention includes: the DME storage tank, liquid valve, reflux valve, pressure controlled valve, the low-pressure fuel transfer pump, the oil return tee union, tee union, accumulator, pressure gauge, one-way valve, fuel filter, the Injection Pump return tube, strengthen Injection Pump, the oil sprayer return tube, high-pressure oil pipe, double-deck spray orifice oil sprayer, cylinder cap, suction tude, the firing chamber, cooler for recycled exhaust gas, EGR control valve, outlet pipe, liquid-filling valve, its Placement is: the DME storage tank links to each other with the low-pressure fuel transfer pump with pipeline by liquid valve, the outlet of low-pressure fuel transfer pump links to each other with the reinforced Injection Pump with fuel filter through tee union one end, constitutes the low-pressure fuel transporting system.The low-pressure fuel transfer pump is driven by the 24V DC electrical source liquid dimethyl ether fuel is transported to the reinforced Injection Pump.The other end of tee union links to each other with accumulator, and accumulator is used for the pressure of stabilizing low voltage fuel delivery system, and pressure gauge is installed on accumulator.The outlet of reinforced Injection Pump is connected with double-deck spray orifice oil sprayer by high-pressure oil pipe, constitutes fuel high pressure pipeline.Double-deck spray orifice oil sprayer is installed in cylinder and covers, and matches with the firing chamber in its position.Under the effect of reinforced Injection Pump, fuel pressure raises and makes double-deck spray orifice oil sprayer unlatching fuel injection into formation inflammable mixture in the firing chamber.The oil sprayer return tube links to each other with the pressure control valve inlet through oil return tee union, one-way valve with the Injection Pump return tube, and the pressure control valve outlet port then is connected to the DME storage tank by reflux valve.Regulate pressure in return line and the reinforced Injection Pump by pressure controlled valve, open during overpressure and make fuel be back to the DME storage tank through reflux valve.Part waste gas is incorporated into the cooler for recycled exhaust gas inlet by EGR control valve in the engine exhaust pipe, and waste gas cools off through cooler for recycled exhaust gas, is transported to suction tude by pipeline.EGR control valve control sucks the exhausted air quantity of suction tude.On the DME storage tank, liquid-filling valve is installed also.
The spray orifice of the oil nozzle of super multidirectional injector divides two-layer layout up and down along axial direction, along circumferential even layout, and along week up and down spray orifice be staggered.The firing chamber is a dell reducing shape.
The present invention has substantive distinguishing features and remarkable progress, the present invention adopts the double-deck spray orifice oil sprayer with high throughflow cross section, high diffusance, be complementary with it to obtain the reinforced Injection Pump that high supply capability and high fuel injection rate are target, shorten oil injection duration and improve the fuel space diffusance; Adopt significantly retarded injection measure and cooled exhaust air recirculating technique simultaneously, prolong delay period, make point of ignition be deferred to atdc, in delay period, all spray into dimethyl ether fuel in the firing chamber; Utilize low, the high-vapor-pressure of dimethyl ether fuel boiling point, being easy to vaporize forms the advantage of mixed gas, adopts to have the dell reentrant combustion chamber, and tissue sprays the stronger composite air motion that is complementary with fuel, make fuel spray atomizing and air mixing rapidly, and be uniformly distributed in the bags; Before catching fire, form the quasi-Homogeneous charge, realize quick low temperature compression ignition combustion, significantly reduce NO
xDischarging improves the thermal efficiency, finally reaches the efficient and minimum discharge of dimethyl ether fuel motor.
Description of drawings
Fig. 1 structural representation of the present invention
Embodiment
As shown in Figure 1, the present invention includes: DME storage tank 1, liquid valve 2, reflux valve 3, pressure controlled valve 4, low-pressure fuel transfer pump 5, oil return tee union 6, tee union 7, accumulator 8, pressure gauge 9, one-way valve 10, fuel filter 11, Injection Pump return tube 12, strengthen Injection Pump 13, oil sprayer return tube 14, high-pressure oil pipe 15, double-deck spray orifice oil sprayer 16, cylinder cap 17, suction tude 18, firing chamber 19, cooler for recycled exhaust gas 20, EGR control valve 21, outlet pipe 22, liquid-filling valve 23, its Placement is: DME storage tank 1 links to each other with low-pressure fuel transfer pump 5 by liquid valve 2,5 outlets of low-pressure fuel transfer pump link to each other with reinforced Injection Pump 13 with fuel filter 11 through tee union 7 one ends, constitute the low-pressure fuel transporting system, 13 outlets of reinforced Injection Pump are connected with double-deck spray orifice oil sprayer 16 by high-pressure oil pipe 15, constitute fuel high pressure pipeline, on accumulator 8, be provided with pressure gauge 9, double-deck spray orifice oil sprayer 16 is arranged on the engine cylinder cap 17, match with firing chamber 19 in double-deck spray orifice oil sprayer 16 mounting points, EGR control valve 21 outlets link to each other with cooler for recycled exhaust gas 20 inlets, its inlet then is connected to outlet pipe 22, cooler for recycled exhaust gas 20 outlets are connected to suction tude 18 by pipeline, oil sprayer return tube 14 is connected by oil return tee union 6 with Injection Pump return tube 12, and process one-way valve 10 is connected to pressure controlled valve 4, pressure controlled valve 4 outlets then are connected to DME storage tank 1 by reflux valve 3, and liquid-filling valve 23 is located on the DME storage tank 1.
5 outlets of low-pressure fuel transfer pump are connected with accumulator 8 by the other end of tee union 7.Firing chamber 19 is a dell reducing shape.The spray orifice of the oil nozzle of super multidirectional injector 16 divides two-layer layout up and down along axial direction, along circumferential even layout, and along week up and down spray orifice be staggered.
As shown in Figure 1, wherein A is for flowing into cooling liquid, B is for flowing out cooling liquid, low-pressure fuel transfer pump 5 is extracted the liquid dimethyl ether fuel out and is transported to reinforced Injection Pump 13 through fuel filter 11, its effect is to guarantee fuel supply, and make fuel under enough pressure, keep liquid form to enter reinforced Injection Pump 13, and accumulator 8 plays the effect of steady pressure.Double-deck spray orifice oil sprayer 16 is back to DME storage tank 1 with the unnecessary fuel of reinforced Injection Pump 13 through pressure controlled valve 4.By the control of EGR control valve 21, the quantitative waste gas that required engine load is wanted is transported to suction tude 18 from outlet pipe 22 after cooler for recycled exhaust gas 20 coolings, thereby is mixed into cylinder with fresh air.The effect of introducing waste gas in the air inlet is to dilute in-cylinder combustion district oxygen concentration on the one hand, increases high specific heat capacity gas on the other hand and reduces cylinder temperature, generates thereby prolong delay period and reduce nitrogen oxide.Near compression top center the time, reinforced Injection Pump 13 is transported to double-deck spray orifice oil sprayer 16 with high pressure with dimethyl ether fuel, after pressure surpasses injection starting pressure, dimethyl ether fuel is injected firing chamber 19 through double-deck spray orifice oil sprayer 16 with high speed, high diffusance, fuel sprays into back vaporization and air mixing fast, and is evenly distributed on the bags before catching fire.When mixture temperature reaches point of ignition in the firing chamber 19, the quasi-homogenous mixture multiple spot simultaneously fire burns.The design of new combustion chamber 19 and fuel spray coupling, form strong gas flow simultaneously in cylinder, accelerate dimethyl ether fuel and mix, and promote the combustion process progress, form efficient, low emissions combustion.
Claims (2)
1, a kind of dimethyl ether engine is efficient, the minimum discharge combustion system, comprise: DME storage tank (1), liquid valve (2), reflux valve (3), oil return tee union (6), tee union (7), accumulator (8), pressure gauge (9), one-way valve (10), fuel filter (11), Injection Pump return tube (12), oil sprayer return tube (14), high-pressure oil pipe (15), cylinder cap (17), suction tude (18), cooler for recycled exhaust gas (20), EGR control valve (21), outlet pipe (22), liquid-filling valve (23), it is characterized in that also comprising: pressure controlled valve (4), low-pressure fuel transfer pump (5), reinforced Injection Pump (13), double-deck spray orifice oil sprayer (16), firing chamber (19), its Placement is: DME storage tank (1) links to each other with low-pressure fuel transfer pump (5) by liquid valve (2), low-pressure fuel transfer pump (5) outlet links to each other with reinforced Injection Pump (13) with fuel filter (11) through tee union (7) one ends, constitute the low-pressure fuel transporting system, reinforced Injection Pump (13) outlet is connected with double-deck spray orifice oil sprayer (16) by high-pressure oil pipe (15), constitute fuel high pressure pipeline, double-deck spray orifice oil sprayer (16) is arranged on the engine cylinder cap (17), double-deck spray orifice oil sprayer (16) matches with firing chamber (19), EGR control valve (21) outlet links to each other with cooler for recycled exhaust gas (20) inlet, its inlet then is connected to outlet pipe (22), cooler for recycled exhaust gas (20) outlet is connected to suction tude (18) by pipeline, oil sprayer return tube (14) is connected by oil return tee union (6) with Injection Pump return tube (12), and process one-way valve (10) is connected to pressure controlled valve (4), pressure controlled valve (4) outlet then is connected to DME storage tank (1) by reflux valve (3), liquid-filling valve (23) is arranged on the DME storage tank (1), the spray orifice of the oil nozzle of double-deck spray orifice oil sprayer (16) divides two-layer layout up and down along axial direction, along circumferential even layout, and along week up and down spray orifice be staggered, firing chamber (19) are dell reducing shape.
2, efficient, the minimum discharge combustion system of dimethyl ether engine according to claim 1 is characterized in that, low-pressure fuel transfer pump (5) outlet is connected with accumulator (8) by tee union (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031295509A CN1272539C (en) | 2003-06-26 | 2003-06-26 | Dimethyl ether engine efficient, ultra-low emission combustion system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031295509A CN1272539C (en) | 2003-06-26 | 2003-06-26 | Dimethyl ether engine efficient, ultra-low emission combustion system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1470758A CN1470758A (en) | 2004-01-28 |
| CN1272539C true CN1272539C (en) | 2006-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031295509A Expired - Fee Related CN1272539C (en) | 2003-06-26 | 2003-06-26 | Dimethyl ether engine efficient, ultra-low emission combustion system |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT500739A3 (en) * | 2005-11-24 | 2006-10-15 | Avl List Gmbh | METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE |
| CN102954487B (en) * | 2011-12-02 | 2015-06-24 | 浙江永源机电制造有限公司 | Burning system |
| CN102562279A (en) * | 2012-01-12 | 2012-07-11 | 江世椿 | Engine utilizing dimethyl ether |
| CN105545559A (en) * | 2015-12-14 | 2016-05-04 | 中国北方发动机研究所(天津) | Diesel engine combustion system |
| CN109973213A (en) * | 2019-04-30 | 2019-07-05 | 郑州航空工业管理学院 | The energy saving compression-ignition engine of compression ratio continuous variable flexible operation |
| CN112112725A (en) * | 2020-09-28 | 2020-12-22 | 华中科技大学 | Combustion chamber system suitable for high-power-density diesel engine |
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2003
- 2003-06-26 CN CNB031295509A patent/CN1272539C/en not_active Expired - Fee Related
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Granted publication date: 20060830 Termination date: 20210626 |