CN100497927C - Mixed fuel oil injector used for diesel oil and dimethyl ether - Google Patents
Mixed fuel oil injector used for diesel oil and dimethyl ether Download PDFInfo
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- CN100497927C CN100497927C CNB2007100705981A CN200710070598A CN100497927C CN 100497927 C CN100497927 C CN 100497927C CN B2007100705981 A CNB2007100705981 A CN B2007100705981A CN 200710070598 A CN200710070598 A CN 200710070598A CN 100497927 C CN100497927 C CN 100497927C
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- dimethyl ether
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- way valve
- diesel oil
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Abstract
A mixed fuel injector used for diesel oil and DME mainly consists of a fuel injector needle valve body, a fuel injector needle valve, a fuel injector body, a DME one-way valve, a fuel-mixer body, a diesel oil one-way valve, etc. The DME one-way valve is communicated with a diesel oil one-way valve cavity, and the diesel oil one-way valve and the DME one-way valve are arranged inside the fuel mixer body to compose a fuel mixer. The diesel oil one-way valve is communicated with the oil groove of a fuel injector through the fuel injector body and a mixed fuel inlet hole. The present invention provides a mixed fuel injector used for diesel oil and DME, wherein the original diesel engine oil supply system can be used not only as the diesel oil supply system of the mixed fuel, but also as the drive system of the mixed fuel. The mixed fuel is formed inside the fuel injector. The DME does not need to go directly through the oil pump, and the diesel oil in the mixed fuel plays a lubricating role on the moving parts inside the fuel injector, thus resolving the engine abrasion problem in the course of using the DME.
Description
Technical field
The present invention relates to the oil sprayer of compression ignition engine dimethyl ether fuel and diesel oil, particularly compression ignition engine combustion diesel fuel and dimethyl ether mixed fuel oil injector belong to dynamic power machine categories such as automobile, internal-combustion engine.
Background technique
Because the compression ignition engine thermal efficiency height that uses diesel oil to act as a fuel uses more and more general.But the harmful soot and the oxynitrides of its discharging are very high.Although people take a lot of technical measures to reduce this two kinds of dischargings, be difficult to reduce them simultaneously.Dimethyl ether is as a kind of emerging cleaning oxygenated fuel, and burning can greatly reduce carbon smoke exhaust on compression ignition engine, reduces the discharging of oxynitrides effectively and reduces noise.In recent years, people have carried out a large amount of research.At present, diesel oil still is the fuel of compression ignition engine, also is to use diesel oil to act as a fuel from now in considerable time.A large amount of experiments show, use the fuel combination of diesel oil blending dimethyl ether can reduce soot and oxynitrides discharging effectively on compression ignition engine.
In the prior art, the fuel combination of diesel oil and dimethyl ether has dual mode to enter engine cylinder combustion both at home and abroad.A kind of mode is that diesel oil and dimethyl ether are mixed in container earlier according to a certain percentage, enters the oil supply system of diesel engine again.As patent " dimethyl ether blending and burning technology " (patent No. ZL00103920.2, inventor: Yang Qing Buddhist etc.) dimethyl ether and diesel oil are mixed in container by a certain percentage, enter the oil supply system of former motor again.Document " experimental research that diesel engine with direct injection is dimethyl-ether-mixed " (" shipbuilding of wuhan ", 2000 the 5th phases, the author: the fourth river is clear etc.) introduce diesel engine with direct injection and used diesel oil and dimethyl ether mixed fuel, adopt the combustion system and the injection system of former motor, fuel tank and low pressure oil circuit are changed, and diesel oil and dimethyl ether mixed fuel prepare in advance, are loaded in the seal container, adopt 10 atmospheric nitrogen bottles that fuel tank is pressurizeed, make dimethyl ether remain liquid state.This mode device complexity, fuel combination need preparation in advance, and need high pressure nitrogen, the user cost height.Another kind of mode is on-line mixing in ejecting system with diesel oil and dimethyl ether, makes fuel combination.As patent " diesel oil, dimethyl ether hybrid injection system " (patent No. ZL200310121608.1, inventor: Huang Zhen etc.) invented a kind of diesel oil, dimethyl ether hybrid injection system, the diesel oil oil supply system is both as the oil supply system of diesel oil in the fuel combination, again as the drive system of dimethyl ether, fuel combination forms in oil sprayer, dimethyl ether need not directly to pass through oil pump, does not also need the high devices of expense such as high-pressure nitrogen bottle, and this invention has solved the wear problem of parts simultaneously.This mode complex structure.The mode of all these combustion diesel fuels and dimethyl ether mixed fuel all is that the mode with engine spray (fuel oil) system provides, and does not also have the mixed fuel oil injector of a kind of diesel oil and dimethyl ether at present.
Summary of the invention
In order to overcome deficiency of the prior art and defective, the invention provides a kind of mixed fuel oil injector that is used for diesel oil and dimethyl ether, mainly comprise: the fuel injector needle valve body, oil-fuel injector needle-valve, the tight cap of oil sprayer, the oil sprayer tappet, oil injector body, following of spring for fuel injector, spring for fuel injector, the oil sprayer look nut, the spring for fuel injector seat of honour, the oil sprayer pressure regulating screw, the oil sprayer helmet, the oil sprayer spill port, packing ring, the unidirectional valve pocket of dimethyl ether, the dimethyl ether check valve spring, the unidirectional valve ball of dimethyl ether, the dimethyl ether oil inlet hole, the fuel mix body, the diesel oil oil inlet hole, the diesel oil one-way valve ball, the diesel oil one-way valve chamber, the diesel oil one-way valve spring, boss, oil sprayer fuel combination oil inlet hole, the oil sprayer oil holding slot, spray orifice, diesel oil one-way valve ball and diesel oil one-way valve spring are positioned at the diesel oil one-way valve chamber, and they constitute diesel oil one-way valve.A boss is arranged in the diesel oil one-way valve spring.Unidirectional valve ball of dimethyl ether and dimethyl ether check valve spring are positioned at the unidirectional valve pocket of dimethyl ether, and they constitute the dimethyl ether one-way valve.The diesel oil oil inlet hole communicates with diesel oil one-way valve, and the dimethyl ether oil inlet hole communicates with the dimethyl ether one-way valve, and the dimethyl ether one-way valve communicates with the diesel oil one-way valve chamber, and the diesel oil oil inlet hole is vertical with the dimethyl ether oil inlet hole.Diesel oil one-way valve and dimethyl ether one-way valve are positioned at the fuel mix body, and they constitute fuel mixer.The fuel mixer underpart connects by screw thread and oil injector body, and pad is arranged between the two.Oil-fuel injector needle-valve is positioned at the fuel injector needle valve body, by the tight cap of oil sprayer fuel injector needle valve body and oil injector body is connect.Spray orifice is arranged at fuel injector needle valve body bottom.One boss is arranged at oil-fuel injector needle-valve top, connects with the oil sprayer tappet.Following connection of oil sprayer tappet top and spring for fuel injector, spring for fuel injector between following of the spring for fuel injector and the spring for fuel injector seat of honour, they be positioned at the oil sprayer pressure regulating screw below.The oil sprayer pressure regulating screw connects by look nut and oil injector body.The oil sprayer helmet is arranged above the oil sprayer pressure regulating screw, an oil sprayer spill port is arranged on the oil sprayer helmet.Diesel oil one-way valve communicates by oil injector body fuel combination oil inlet hole and oil sprayer oil holding slot.When mixed fuel pressure was enough high, jack-up oil-fuel injector needle-valve, fuel combination sprayed in the cylinder by spray orifice and burn.By the fuel combination that leaks between oil-fuel injector needle-valve and fuel injector needle valve body, flow back to oil pump for engine through passage and oil sprayer spill port between oil sprayer tappet and the oil injector body, the diesel oil in the fuel combination plays lubrication to the moving element in the oil sprayer.
The invention provides a kind of mixed fuel oil injector that is used for diesel oil and dimethyl ether, the original diesel oil oil supply system of compression ignition engine both can be used as the oil supply system of diesel oil in the fuel combination, can be used as the drive system of fuel combination again, fuel combination forms in oil sprayer, saved the space to greatest extent, can control the injection of fuel combination easily by the fuel supply advance angle of adjusting the diesel oil oil pump, make full use of the parts of original oil supply systems such as oil pump, dimethyl ether does not need directly to pass through oil pump, and motor is changed seldom.And diesel oil in the fuel combination in the oil sprayer moving element play lubrication, solved the wear problem that motor uses dimethyl ether to bring.The present invention has substantive distinguishing features and remarkable progress.
Description of drawings
Fig. 1 is the structural representation of system of the present invention.
Among the figure, 1 is the fuel injector needle valve body, 2 is oil-fuel injector needle-valve, 3 is the tight cap of oil sprayer, 4 is the oil sprayer tappet, 5 is oil injector body, 6 are following of spring for fuel injector, 7 is spring for fuel injector, 8 is the oil sprayer look nut, 9 is the spring for fuel injector seat of honour, 10 is the oil sprayer pressure regulating screw, 11 is the oil sprayer helmet, 12 is the oil sprayer spill port, 13 is packing ring, 14 is the unidirectional valve pocket of dimethyl ether, 15 is the dimethyl ether check valve spring, 16 is the unidirectional valve ball of dimethyl ether, 17 is the dimethyl ether oil inlet hole, 18 is the fuel mix body, 19 is the diesel oil oil inlet hole, 20 is the diesel oil one-way valve ball, 21 is the diesel oil one-way valve chamber, 22 is the diesel oil one-way valve spring, 23 is boss, 24 is oil sprayer fuel combination oil inlet hole, 25 is the oil sprayer oil holding slot, 26 is spray orifice.
Embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As shown in Figure 1, the present invention mainly comprises: fuel injector needle valve body 1, oil-fuel injector needle-valve 2, the tight cap 3 of oil sprayer, oil sprayer tappet 4, oil injector body 5, following 6 of spring for fuel injector, spring for fuel injector 7, oil sprayer look nut 8, the spring for fuel injector seat of honour 9, oil sprayer pressure regulating screw 10, oil sprayer helmet 11, oil sprayer spill port 12, packing ring 13, the unidirectional valve pocket 14 of dimethyl ether, dimethyl ether check valve spring 15, the unidirectional valve ball 16 of dimethyl ether, dimethyl ether oil inlet hole 17, fuel mix body 18, diesel oil oil inlet hole 19, diesel oil one-way valve ball 20, diesel oil one-way valve chamber 21, diesel oil one-way valve spring 22, boss 23, oil sprayer fuel combination oil inlet hole 24, oil sprayer oil holding slot 25, spray orifice 26, diesel oil one-way valve ball 20 and diesel oil one-way valve spring 22 are positioned at diesel oil one-way valve chamber 21, and they constitute diesel oil one-way valve.A boss 23 is arranged in the diesel oil one-way valve spring 22.Unidirectional valve ball 16 of dimethyl ether and dimethyl ether check valve spring 15 are positioned at the unidirectional valve pocket 14 of dimethyl ether, and they constitute the dimethyl ether one-way valve.The elasticity coefficient of diesel oil one-way valve spring 22 is bigger than the elasticity coefficient of dimethyl ether check valve spring 15, and the volume of the unidirectional valve pocket 14 of volume ratio dimethyl ether in diesel oil one-way valve chamber 21 is big.Diesel oil oil inlet hole 19 communicates with diesel oil one-way valve, and dimethyl ether oil inlet hole 17 communicates with the dimethyl ether one-way valve, and the dimethyl ether one-way valve communicates with diesel oil one-way valve chamber 21, and diesel oil oil inlet hole 19 is vertical with dimethyl ether oil inlet hole 17.Diesel oil one-way valve and dimethyl ether one-way valve are positioned at fuel mix body 18, and they constitute fuel mixer.The fuel mixer underpart connects by screw thread and oil injector body 5, and pad 13 is arranged between the two.Oil-fuel injector needle-valve 2 is positioned at fuel injector needle valve body 1, by the tight cap 3 of oil sprayer fuel injector needle valve body 1 and oil injector body 5 is connect.Spray orifice 26 is arranged at fuel injector needle valve body 1 bottom.One boss is arranged at oil-fuel injector needle-valve 2 tops, connects with oil sprayer tappet 4.Following 6 of oil sprayer tappet 4 tops and spring for fuel injector connect, spring for fuel injector 7 between following 6 of the spring for fuel injector and the spring for fuel injector seat of honour 9, they be positioned at oil sprayer pressure regulating screw 10 below.The elasticity coefficient of spring for fuel injector 7 is bigger than the elasticity coefficient of dimethyl ether check valve spring 15.Oil sprayer pressure regulating screw 10 connects by look nut 8 and oil injector body 5.Oil sprayer helmet 11 is arranged above the oil sprayer pressure regulating screw 10, an oil sprayer spill port 12 is arranged on the oil sprayer helmet 11.Diesel oil one-way valve communicates by oil injector body fuel combination oil inlet hole 24 and oil sprayer oil holding slot 25.
Dimethyl ether fuel is liquid in the dimethyl ether storage tank under the normal temperature, and pressure is 5～10 barometric pressure.When motor not during fuel feeding, diesel oil pressure is lower in the diesel oil oil inlet hole 19, diesel oil one-way valve ball 20 is under the effect of diesel oil one-way valve spring 22, close diesel oil oil inlet hole 19, and the unidirectional valve ball 16 of dimethyl ether dimethyl ether effect lower compression dimethyl ether check valve spring 15 in dimethyl ether oil inlet hole 17, dimethyl ether enters in the unidirectional valve pocket 14 of dimethyl ether from dimethyl ether oil inlet hole 17, enters in diesel oil one-way valve chamber 21, oil sprayer fuel combination oil inlet hole 24 and the oil sprayer oil holding slot 25 again.This moment since in the oil sprayer oil holding slot 25 mixed fuel pressure be lower than the pretightening force of spring for fuel injector 7, under the effect of the pretightening force of spring for fuel injector 7, oil-fuel injector needle-valve 2 is taken a seat, and closes spray orifice 26.When motor begins fuel feeding, diesel oil pressure surpasses the active force of diesel oil one-way valve spring 22 in the diesel oil oil inlet hole 19, the diesel oil effect lower compression diesel oil one-way valve spring 22 of diesel oil one-way valve ball 20 in diesel oil oil inlet hole 19, open diesel oil one-way valve, high-pressure diesel enters diesel oil one-way valve chamber 21, and mix with dimethyl ether, under the effect of dimethyl ether check valve spring 15, close dimethyl ether oil inlet hole 17 by the unidirectional valve ball 16 of dimethyl ether.Fuel combination after the supercharging enters in the oil sprayer oil holding slot 25 by oil injector body fuel combination oil inlet hole 24.When the mixed fuel pressure in the oil sprayer oil holding slot 25 was higher than the pretightening force of spring for fuel injector 7, the fuel combination in the oil sprayer oil holding slot 25 backed down fuel injector needle valve body 1, and fuel combination sprays in the cylinder by spray orifice 26 and burns.Fuel combination by oil-fuel injector needle-valve 1 and 2 leakages of fuel injector needle valve body, flow back to oil pump for engine through passage and oil sprayer spill port 12 between oil sprayer tappet 4 and the oil injector body 5, the diesel oil in the fuel combination plays lubrication to the moving element in the oil sprayer.
Claims (5)
1. one kind is used for diesel oil and dimethyl ether mixed fuel oil injector, mainly comprise: fuel injector needle valve body (1), oil-fuel injector needle-valve (2), the tight cap of oil sprayer (3), oil sprayer tappet (4), oil injector body (5), following of spring for fuel injector (6), spring for fuel injector (7), oil sprayer look nut (8), the spring for fuel injector seat of honour (9), oil sprayer pressure regulating screw (10), oil sprayer helmet (11), oil sprayer spill port (12), packing ring (13), the unidirectional valve pocket of dimethyl ether (14), dimethyl ether check valve spring (15), the unidirectional valve ball of dimethyl ether (16), dimethyl ether oil inlet hole (17), fuel mix body (18), diesel oil oil inlet hole (19), diesel oil one-way valve ball (20), diesel oil one-way valve chamber (21), diesel oil one-way valve spring (22), boss (23), oil sprayer fuel combination oil inlet hole (24), oil sprayer oil holding slot (25), spray orifice (26), it is characterized in that: diesel oil one-way valve ball (20) and diesel oil one-way valve spring (22) are positioned at diesel oil one-way valve chamber (21), they constitute diesel oil one-way valve, and a boss (23) is arranged in the diesel oil one-way valve spring (22); Unidirectional valve ball of dimethyl ether (16) and dimethyl ether check valve spring (15) are positioned at the unidirectional valve pocket of dimethyl ether (14), and they constitute the dimethyl ether one-way valve; Diesel oil oil inlet hole (19) communicates with diesel oil one-way valve, dimethyl ether oil inlet hole (17) communicates with the dimethyl ether one-way valve, the dimethyl ether one-way valve communicates with diesel oil one-way valve chamber (21), diesel oil one-way valve and dimethyl ether one-way valve are positioned at fuel mix body (18), they constitute fuel mixer, and the fuel mixer underpart connects by screw thread and oil injector body (5); Oil-fuel injector needle-valve (2) is positioned at fuel injector needle valve body (1), by the tight cap of oil sprayer (3) fuel injector needle valve body (1) and oil injector body (5) are connect, spray orifice (26) is arranged at fuel injector needle valve body (1) bottom, oil-fuel injector needle-valve (2) connects with oil sprayer tappet (4), oil sprayer tappet (4) top and spring for fuel injector following (6) connect, spring for fuel injector (7) is positioned between the spring for fuel injector following (6) and the spring for fuel injector seat of honour (9), they be positioned at oil sprayer pressure regulating screw (10) below, oil sprayer pressure regulating screw (10) connects by look nut (8) and oil injector body (5), oil sprayer helmet (11) is arranged above the oil sprayer pressure regulating screw (10), an oil sprayer spill port (12) is arranged on the oil sprayer helmet (11); Diesel oil one-way valve communicates by oil injector body fuel combination oil inlet hole (24) and oil sprayer oil holding slot (25).
2. diesel oil and the dimethyl ether mixed fuel oil injector of being used for as claimed in claim 1, it is characterized in that: the elasticity coefficient of diesel oil one-way valve spring (22) is bigger than the elasticity coefficient of dimethyl ether check valve spring (15).
3. diesel oil and the dimethyl ether mixed fuel oil injector of being used for as claimed in claim 1, it is characterized in that: the elasticity coefficient of spring for fuel injector (7) is bigger than the elasticity coefficient of dimethyl ether check valve spring (15).
4. diesel oil and the dimethyl ether mixed fuel oil injector of being used for as claimed in claim 1 is characterized in that: the volume of the unidirectional valve pocket of volume ratio dimethyl ether (14) of diesel oil one-way valve chamber (21) is big.
5. diesel oil and the dimethyl ether mixed fuel oil injector of being used for as claimed in claim 1, it is characterized in that: diesel oil oil inlet hole (19) is vertical with dimethyl ether oil inlet hole (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100705981A CN100497927C (en) | 2007-09-04 | 2007-09-04 | Mixed fuel oil injector used for diesel oil and dimethyl ether |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100705981A CN100497927C (en) | 2007-09-04 | 2007-09-04 | Mixed fuel oil injector used for diesel oil and dimethyl ether |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101117930A CN101117930A (en) | 2008-02-06 |
| CN100497927C true CN100497927C (en) | 2009-06-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100705981A Expired - Fee Related CN100497927C (en) | 2007-09-04 | 2007-09-04 | Mixed fuel oil injector used for diesel oil and dimethyl ether |
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| CN (1) | CN100497927C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2633846C (en) * | 2008-06-27 | 2009-12-29 | Westport Power Inc. | Fuel injection valve and method for co-injecting a liquid and a gaseous fuel into the combustion chamber of an internal combustion engine |
| CN103670851B (en) * | 2013-11-28 | 2015-10-28 | 上海交通大学 | Be applicable to two high-pressure oil pipe oil sprayers of dimethyl ether fuel |
| CN107191301A (en) * | 2017-06-02 | 2017-09-22 | 北京交通大学 | A kind of air-fuel mixture injection apparatus |
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2007
- 2007-09-04 CN CNB2007100705981A patent/CN100497927C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101117930A (en) | 2008-02-06 |
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Granted publication date: 20090610 Termination date: 20100904 |