CN1279346A - Dimethylether controllable premixed gas combustion system - Google Patents
Dimethylether controllable premixed gas combustion system Download PDFInfo
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- CN1279346A CN1279346A CN00119436A CN00119436A CN1279346A CN 1279346 A CN1279346 A CN 1279346A CN 00119436 A CN00119436 A CN 00119436A CN 00119436 A CN00119436 A CN 00119436A CN 1279346 A CN1279346 A CN 1279346A
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- dimethyl ether
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- dimethylether
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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
A controllable combustion system for premixed dimethylether gas is composed of main combustion chamber, premixing chamber, control valve, release spring, cam mechanism, oil jet, electric control unit, electromagnetic valve, one-way valve, pressure regulation valve, high-pressure nitrogen cylinder and dimethylether fuel cylinder. Said control valve matched with can mechanism is between main combustion and premixing chamber. Said high-pressure nitrogen cylinder is communicated via pipeline to the upper part of dimethylether fuel cylinder with pressure method and valve.
Description
What the present invention relates to is a kind of combustion system of dimethyl ether fuel, and particularly a kind of dimethylether controllable premixed gas combustion system belongs to the internal-combustion engine research field.
From environmental angle, dimethyl ether is considered to the desirable substitute fuel of diesel oil, but the similar liquefied petroleum gas (LPG) of its physical property, and normal temperature is gaseous state down, pressurized liquefied after, viscosity is low, compressibility varies with temperature very big.Therefore, very high to combustion system design requirement, fuel leak and lubricity are the problems that at first will consider.In existing technology, the combustion system of being made up of dimethyl ether high pressure common rail fuel injection system conventional diesel engine direct injection combustion chamber that document SAE981158 introduces is comparatively typical.At first dimethyl ether is forced into and squeezes into high pressure rail about 30.0MPa by high-pressure service pump, again by electromagnetic valve, with the fuel in the track by oil nozzle to inner cylinder direct injection.System also is provided with devices such as gas leakage collecting tank.The structure of whole combustion system is quite complicated, manufacture cost costliness, faut detection and maintenance difficult.
The objective of the invention is to overcome the deficiency and the defective of prior art, solve the leakage and the lubrication problem of dimethyl ether fuel, reduce manufacture cost.Engine chamber is divided into main combustion chamber and premixing cavity two-part, and passage is controlled by a control valve between two Room.Pressure is the dimethyl ether fuel about 3.0MPa sprays into low-pressure by oil nozzle premixing cavity.Under the control valve effect, make the fuel that sprays into premixing cavity carry out three mixed combustion.Because adopt low pressure fuel system, and do not use high-pressure service pump, fuel leak and matching part abrasion problem can effectively be solved.
Technological scheme of the present invention: the present invention mainly comprises main combustion chamber, premixing cavity, control valve, cam mechanism, return spring, oil nozzle, ECU (Electrical Control Unit), solenoid valve, pressure gauge, pressure regulator valve, high-pressure nitrogen bottle, dimethyl ether fuel jar, fuel pot switch valve, one-way valve and pipeline etc.One passage is arranged between main combustion chamber and premixing cavity, control valve is housed in the passage, return spring is contained on the control valve valve rod, cam mechanism and control valve mechanical anastomosis.High-pressure nitrogen bottle top is connected by pipeline and dimethyl ether fuel jar top, dimethyl ether fuel jar lower exit place is connected with an end of solenoid valve by pipeline, the other end of solenoid valve is connected with the front end of one-way valve by pipeline, and the rear end of one-way valve joins by pipeline and oil nozzle entrance point.Oil nozzle is connected with pressing plate with premixing cavity.In the pipeline of high-pressure nitrogen bottle upper end, pressure regulator valve is housed, regulates pressure regulator valve, can be about 3.0MPa with the pressure stability in the dimethyl ether fuel jar.This can make dimethyl ether keep liquid on the one hand, is convenient to realize the injection of dimethyl ether fuel on the other hand.Above the dimethyl ether fuel jar, pressure gauge is housed, is used for monitoring dimethyl ether fuel jar internal pressure situation of change.In the pipeline of dimethyl ether fuel jar outlet port the fuel pot switch valve is housed, during shutdown, this valve closing can prevent that dimethyl ether from leaking.Be connected by circuit between ECU (Electrical Control Unit) and the solenoid valve.At motor suction stroke later stage or compression stroke initial stage, under the return spring effect, cam mechanism is controlled at closed position with control valve; At this moment, send instruction by ECU (Electrical Control Unit), open and close magnetic valve is that liquid dimethyl ether fuel about 3.0MPa sprays into premixing cavity by oil nozzle with a certain amount of pressure.The dimethyl ether fuel that sprays into premixing cavity is vaporized fast, and carries out even premixing with premixing indoor air and part waste gas, promptly mixes for the first time, forms dense premixed gas, carries out the part pre-flame reaction simultaneously; In compression stroke when piston stroking upward is near top dead center, control valve is opened in effect by cam mechanism and return spring, owing to there is bigger pressure reduction between main combustion chamber and the premixing cavity, the high temperature air of main combustion chamber enters premixing cavity rapidly, carry out mixing the second time with rich mixture, form inflammable mixture in the part, and the initial burning burning.Because temperature, pressure in the premixing cavity sharply raise, main combustion chamber is poured in possible trouble gas, air and combustion gas, mixes for the third time with fresh air in the main combustion chamber, finishes main burning.The effect of the one-way valve of installing in the pipeline is to stop high-temperature fuel gas to be back to oil-fired system.
Beneficial effect of the present invention: the present invention proposes the controlled premixed combustion system of new dimethyl ether, utilized dimethyl ether high-vapor-pressure, low boiling and mixed gas to form easy characteristic dexterously, make dimethyl ether under low jet pressure, spray into premixing cavity, and go through three mixing.Because the effect of control valve, solved catch fire control problem and even dense premixed gas and prepared problem.By the combustion system structure optimization, also can solve the high load adaptability problem.This is that the controlled pre-mixing combustion of current dimethyl ether substitute fuel is newly conceived.
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 1 is the principle of compositionality figure of system of the present invention
As shown in Figure 1, the present invention mainly comprises main combustion chamber 1, premixing cavity 2, control valve 3, cam mechanism 4, oil nozzle 5, ECU (Electrical Control Unit) 6, solenoid valve 7, pressure gauge 8, pressure regulator valve 9, high-pressure nitrogen bottle 10, dimethyl ether fuel jar 11, fuel pot switch valve 12, one-way valve 13, return spring 14 and pipeline etc.In the passage between main combustion chamber 1 and premixing cavity 2 control valve 3 is housed.Cam mechanism 4 and control valve 3 mechanical anastomosis, return spring 14 is contained on the valve rod of control valve 3.High-pressure nitrogen bottle 10 upper ends are connected by pipeline and dimethyl ether fuel jar 11 tops, dimethyl ether fuel jar 11 lower exit places are connected with an end of solenoid valve 7 by pipeline, the other end of solenoid valve 7 is connected by the front end of pipeline with one-way valve 13, and the rear end of one-way valve 13 joins by pipeline and oil nozzle 5 entrance points.Oil nozzle 5 is connected with premixing cavity 2 usefulness pressing plates.Pressure regulator valve 9 is housed in the pipeline of high-pressure nitrogen bottle 10 upper ends, regulates pressure regulator valve 9, can with the pressure stability in the dimethyl ether fuel jar 11 about 3.0MPa, make dimethyl ether maintenance liquid state and have enough jet pressures.Pressure gauge 8 is housed above dimethyl ether fuel jar 11, is used for monitoring dimethyl ether fuel jar 11 internal pressure situations of change.In dimethyl ether fuel jar 11 outlet port pipelines fuel pot switch valve 12 is housed, during shutdown, this valve closing can prevent that dimethyl ether from leaking.Be connected by circuit between ECU (Electrical Control Unit) 6 and the solenoid valve 7.
At motor suction stroke later stage or compression stroke initial stage, cam mechanism 4 is controlled at closed position with control valve 3 under return spring 14 effects, send instruction by ECU (Electrical Control Unit) 6 this moment, open and close magnetic valve 7 is that liquid dimethyl ether fuel about 3.0MPa sprays in the premixing cavity 2 by oil nozzle 5 with a certain amount of pressure.The dimethyl ether fuels that spray in the premixing cavity 2 are vaporized rapidly, and carry out even premixing with indoor air and part waste gas, promptly mix for the first time, form dense premixed gas, carry out the part pre-flame reaction simultaneously.When piston stroking upward is near top dead center, effect by cam mechanism 4 and return spring 14, open control valve 3, because bigger pressure reduction between main combustion chamber 1 and the premixing cavity 2, high temperature air in the main combustion chamber 1 pours premixing cavity 2 rapidly, carry out mixing the second time with dense premixed gas, form inflammable mixture in the part, and the initial burning burning.Because temperature, pressure in the premixing cavity 2 sharply raise, so unburned gas, air and combustion gas pour main combustion chamber, mixes for the third time with fresh air in the main combustion chamber, thereby finish main burning.One-way valve 13 is installed in the system, and its effect is to stop high-temperature fuel gas to be back to fuel system.
Claims (3)
1, a kind of dimethylether controllable premixed gas combustion system mainly comprises main combustion chamber (1), oil nozzle (5), solenoid valve (7), dimethyl ether fuel jar (11) etc., it is characterized in that also comprising premixing cavity (2), control valve (3), cam mechanism (4), return spring (14), ECU (Electrical Control Unit) (6), pressure gauge (8), pressure regulator valve (9), high-pressure nitrogen bottle (10), fuel pot switch valve (12), one-way valve (13).In the passage between main combustion chamber (1) and premixing cavity (2) control valve (3) is housed, cam mechanism (4) and control valve (3) mechanical anastomosis.High-pressure nitrogen bottle (10) upper end is connected by pipeline and dimethyl ether fuel jar (11), dimethyl ether fuel jar (11) lower exit place is connected by the end of pipeline with solenoid valve (7), the other end of solenoid valve (7) is connected by the front end of pipeline with one-way valve (13), the rear end of one-way valve (13) joins by pipeline and oil nozzle (5) entrance point, and oil nozzle (5) is connected with pressing plate with premixing cavity (2).Be connected by circuit between ECU (Electrical Control Unit) (6) and the solenoid valve (7);
2, a kind of dimethylether controllable premixed gas combustion system, its feature also is in the pipeline of high-pressure nitrogen bottle (10) upper end pressure regulator valve (9) to be housed, in dimethyl ether fuel jar (11) top pressure gauge (8) is housed, in the pipeline of dimethyl ether fuel jar (11) outlet port, fuel pot switch valve (12) is housed;
3, a kind of dimethylether controllable premixed gas combustion system, its feature also are to be equipped with return spring (14) on the valve rod of control valve (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00119436A CN1111253C (en) | 2000-07-11 | 2000-07-11 | Dimethylether controllable premixed gas combustion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00119436A CN1111253C (en) | 2000-07-11 | 2000-07-11 | Dimethylether controllable premixed gas combustion system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1279346A true CN1279346A (en) | 2001-01-10 |
| CN1111253C CN1111253C (en) | 2003-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00119436A Expired - Fee Related CN1111253C (en) | 2000-07-11 | 2000-07-11 | Dimethylether controllable premixed gas combustion system |
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| Country | Link |
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| CN (1) | CN1111253C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100371582C (en) * | 2002-07-09 | 2008-02-27 | 株式会社博世汽车系统 | Diesel engine DME fuel supply device |
| CN101255834B (en) * | 2002-03-06 | 2011-07-06 | 株式会社博世汽车系统 | DME fuel supply device for diesel engine |
| CN102410110A (en) * | 2011-03-04 | 2012-04-11 | 靳北彪 | Low-entropy mixed combustion gas-liquified substance engine |
| CN106812610A (en) * | 2017-02-17 | 2017-06-09 | 林阳泰 | Pneumatics controls diesel oil/dimethyl ether blending and liquefied petroleum gas mixture burning control system |
| CN107387185A (en) * | 2017-09-08 | 2017-11-24 | 郭颂怡 | Dimethyl ether premixed combustion system is pre-mixed the opening and closing device of valve |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297741C (en) * | 2003-12-30 | 2007-01-31 | 上海交通大学 | Diesel oil pump driven dimethyl ether jet system |
-
2000
- 2000-07-11 CN CN00119436A patent/CN1111253C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101255834B (en) * | 2002-03-06 | 2011-07-06 | 株式会社博世汽车系统 | DME fuel supply device for diesel engine |
| CN100371582C (en) * | 2002-07-09 | 2008-02-27 | 株式会社博世汽车系统 | Diesel engine DME fuel supply device |
| CN102410110A (en) * | 2011-03-04 | 2012-04-11 | 靳北彪 | Low-entropy mixed combustion gas-liquified substance engine |
| CN106812610A (en) * | 2017-02-17 | 2017-06-09 | 林阳泰 | Pneumatics controls diesel oil/dimethyl ether blending and liquefied petroleum gas mixture burning control system |
| CN107387185A (en) * | 2017-09-08 | 2017-11-24 | 郭颂怡 | Dimethyl ether premixed combustion system is pre-mixed the opening and closing device of valve |
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| Publication number | Publication date |
|---|---|
| CN1111253C (en) | 2003-06-11 |
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Granted publication date: 20030611 Termination date: 20100711 |