CN102606345A - Dimethyl ether fuel injection system - Google Patents
Dimethyl ether fuel injection system Download PDFInfo
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- CN102606345A CN102606345A CN2012100738825A CN201210073882A CN102606345A CN 102606345 A CN102606345 A CN 102606345A CN 2012100738825 A CN2012100738825 A CN 2012100738825A CN 201210073882 A CN201210073882 A CN 201210073882A CN 102606345 A CN102606345 A CN 102606345A
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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 invention specifically relates to a dimethyl ether fuel injection system. The technical scheme is as follows: an inlet end of an inlet ball valve (3) of a diaphragm pump (2) is communicated with a dimethyl ether fuel tank (4); an outlet end of an outlet ball valve (1) of the diaphragm pump (2) is communicated with an oil inlet of a common rail pipe (9) through an oil pipe; an oil outlet of the common rail pipe (9) is communicated with a P port of a two-position two-way electromagnetic valve (8); an A port of the two-position two-way electromagnetic valve (8) is communicated with an oil inlet of an oil injector (7); a relay of the two-position two-way electromagnetic valve (8) is connected with a controller pin connector of an electronic control unit (5); and an input circuit of the electronic control unit (5) is connected with a bundle inserter of a sensor bundle (6). The system is low in cost and easy in implementation; the dimethyl ether alternative fuel with ultra-low emission is used and popularized successfully based on the system.
Description
Technical field
The invention belongs to the fuel injection system technical field.Be specifically related to a kind of dimethyl ether fuel injection system.
Background technique
Compression ignition internal combustion engine generally adopts diesel oil to make fuel, but the tail gas of diesel engine is not only big for environment pollution, and price is also increasingly high, and old friends work out the diesel oil alternative fuel widely of originating---dimethyl ether (DME).Dimethyl ether has rerum naturas such as low viscosity, high-vapor-pressure and easy atomizing, directly it is sprayed in the cylinder, needs take a series of special measures at ejecting system.As in prior art; The dimethyl ether engine oil supply system mainly contains high pressure common rail fuel injection system and pump-pipe-mouth fuel injection system; Said system adopts the high-pressure injection pump compression pump that acts as a fuel, the wearing and tearing and the fuel leak of the link place idol part that causes easily pressurizeing.
At present, be the greasy property of improving fuel, the wearing and tearing that slow down fuel injector needle valve coupling in the oil supply system,, can increase user cost, and oiling agent can not fully burn, also can cause new pollution though people have adopted the method for adding oiling agent.So existing system is unfavorable for that the dimethyl ether substitute fuel of minimum discharge is used smoothly and promoted.
Homogeneous compression-ignition (Homogenous Charge Compression Ignition; Be called for short HCCI) be to form homogeneous charge at engine charge and compression process; When piston motion is near compression top center; Mixed gas reaches SIT owing to being compressed, and a kind of combustion manner that high-temperature chemical reaction fast discharges great amount of heat energy takes place.Adopt the HCCI combustion manner can make motor have the high thermal efficiency and low particle (PM) and NOx discharging; " the 3rd kind of combustion manner " that is called internal-combustion engine by people; But HCCI does not also fundamentally solve two technical barriers: mixed gas forms and burning control (containing ignition timing and velocity of combustion), so the HCCI combustion technology only is confined to interior application of middle-low load scope of internal-combustion engine at present.[Hyung?Jun?Kim，Kwan?Soo?Lee，Chang?Sik?Lee.A?study?on?the?reduction?of?exhaust?emissions?through?HCCI?combustion?by?using?a?narrow?spray?angle?and?advanced?injection?timing?in?a?DME?engine.Fuel?Processing?Technology，2011，92：1756-1763]
Summary of the invention
The present invention is intended to overcome the existing technology defective, and purpose provides a kind of cost dimethyl ether fuel injection system low, that implement and can make the dimethyl ether substitute fuel of minimum discharge used smoothly and promote easily.
For realizing above-mentioned purpose, the technological scheme that the present invention adopts is: this ejecting system comprises diaphragm pump, dimethyl ether fuel tank, electronic control unit, sensor wire harness, oil sprayer, 2/2-way solenoid valve and common rail pipe.
The entry end of the inlet ball valve of diaphragm pump communicates with the dimethyl ether fuel tank through oil pipe; The outlet end of barrier film delivery side of pump ball valve communicates with the filler opening of common rail pipe through oil pipe; The oil outlet of common rail pipe communicates through the P mouth of oil pipe and 2/2-way solenoid valve; The A mouth of 2/2-way solenoid valve communicates with the filler opening of oil sprayer; The relay of 2/2-way solenoid valve connects with the controller pin connector of electronic control unit, and the input circlult of electronic control unit connects with the wire harness connector of sensor wire harness.
Said oil sprayer comprises nozzle tip, nozzle carrier, nozzle body, stem valve, Returnning spring and adjustment nut.The heart portion of nozzle body is provided with taper hole, transitional pore, pilot hole and reset hole from left to right concentrically successively, has 5～10 minor diameter inclined holes, the end of minor diameter inclined hole to transitional pore equably in the inner end near the reset hole inwall; Stem valve is provided with inversed taper platform, transiting rod and the body of rod from left to right concentrically successively, and the right-hand member of the body of rod is processed with screw thread.
The left end of nozzle body and right-hand member are connected with centre thread with nozzle tip and nozzle carrier respectively, and the left side of nozzle body and right side are lined with nozzle head packing ring and nozzle middle part packing ring respectively; The body of rod of stem valve passes the pilot hole of nozzle body, the taper hole coupling of the inversed taper platform of stem valve and nozzle body, the pilot hole coupling of the body of rod of stem valve and nozzle body; Returnning spring is enclosed within on the body of rod of stem valve, and an end of Returnning spring is pressed on the inner end face of reset hole, and the other end is pressed on the adjustment nut, the scyewed joint of the body of rod right-hand member of adjustment nut and stem valve.
Said diaphragm pump comprises outer pipe, outlet ball valve, diaphragm chamber, diaphragm of diaphragm pump, inlet ball valve, inlet duct and plunger mechanism.The right-hand member of diaphragm pump is equipped with plunger mechanism; The left end of diaphragm pump is a diaphragm chamber; One side of diaphragm chamber is provided with the inlet ball valve; Opposite side is provided with the outlet ball valve, and diaphragm of diaphragm pump is between diaphragm chamber and plunger mechanism, and diaphragm of diaphragm pump separates the plunger coupled parts of plunger mechanism and the fuel in the diaphragm chamber fully.
Owing to adopt technique scheme; The present invention is directed to rerum natura characteristics such as dimethyl ether low viscosity, high-vapor-pressure and easy atomizing; Adopt the diaphragm pump that is complementary with the low pressure common rail fuel injection system as compression pump; Not only solve the kinematic pair wear problem that brings by the low viscosity of dimethyl ether, significantly reduced the leakage rate of dimethyl ether fuel again; Simultaneously,,, thereby make its resistance that overcomes pipeline, get into by the road in the fuel feeding common rail system of dimethyl ether electric-controlled injection motor the sucking-off from fuel tank of dimethyl ether fuel oil owing to adopt the diaphragm pump that is complementary with the low pressure common rail fuel injection system as compression pump.For diaphragm pump; Because the diaphragm pump plunger coupled parts self has independent forced lubricating system, and plunger coupled parts and pressurized medium separate by barrier film fully, do not exist medium from plunger coupled parts clearance leakage problem; Therefore, the lubricated of diaphragm pump plunger coupled parts can be solved with wear problem completely.
The present invention replaces the conventional diesel engine high-pressure Injection Pump compression pump that acts as a fuel with diaphragm pump; Can effectively avoid the pressurizeing wearing and tearing and the leakage of link place idol part; Diaphragm pump plunger coupled parts and pressurized medium are separated by barrier film fully, so do not exist medium from plunger coupled parts clearance leakage problem; In addition, diaphragm pump self has independent forced lubricating system, so the lubricated of diaphragm pump plunger coupled parts solved with wear problem completely, controlled pre-mixing combustion is become a reality, thereby solves the unmanageable technology barrier of homogeneous combustion ignition timing.
" a kind of nozzle that is used for low-viscosity fuel of internal combustion engine " that the oil sprayer that the present invention adopts has been weighed for the claimant has patented be patented technology (ZL201010143592.4); This patented technology is entered to dimethyl ether (DME) fuel the reset hole of nozzle body by the center hole of nozzle carrier; Minor diameter inclined hole in nozzle body gets into the transiting rod of stem valve and the formed isostasy of the transitional pore chamber of nozzle body; The screw-in or the back-out of adjustment nut can be provided with injection starting pressure in suitable scope; After reaching setting pressure, will overcome the pretightening force of Returnning spring and get into nozzle tip after pushing stem valve open, again by the little spray orifice ejection that distributes on the nozzle tip; After DME fuel lost pressure, stem valve was retreated under the effect of Returnning spring, and the inversed taper platform that relies on stem valve contacts the sealing of formation to DME fuel with the conical surface between the taper hole of nozzle body.
The oil sprayer that the present invention adopts the results showed: DME fuel has 99.8% through the minor diameter inclined hole nozzle body of flowing through; The coupling surface flow of DME fuel through stem valve and nozzle body below 0.2% only arranged through nozzle body; Like this coupling surface of stem valve and nozzle body is not washed away basically, just solved the nozzle coupling surface abrasion problem that causes because of DME fuel viscosity is low yet; The conical surface contact form of Returnning spring and stem valve and nozzle body has the function of the above-mentioned conical surface wearing and tearing of automatic compensation.The oil sprayer that the present invention adopts can also obviously alleviate the coupling surface abrasion of low-viscosity fuel of internal combustion engine nozzle; Have long working life and compensate the characteristics of above-mentioned conical surface wearing and tearing function automatically, thereby make injection nozzle for internal combustion engines involved in the present invention be applicable to the fuel that viscosity is lower.
Therefore, this system has cost characteristics low, that implement and can make the dimethyl ether substitute fuel of minimum discharge used smoothly and promote easily.
Description of drawings
Fig. 1 is a kind of structural representation of the present invention;
Fig. 2 is a kind of structural representation of oil sprayer 7 among Fig. 1;
Fig. 3 is a kind of structural representation of Fig. 1 septation pump 2.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention being further described, is not the restriction to protection domain of the present invention:
Embodiment 1
A kind of dimethyl ether fuel injection system, the structure of this ejecting system is as shown in Figure 1, comprises diaphragm pump 2, dimethyl ether fuel tank 4, electronic control unit 5, sensor wire harness 6, oil sprayer 7,2/2-way solenoid valve 8 and common rail pipe 9.
The entry end of the inlet ball valve 3 of diaphragm pump 2 communicates with dimethyl ether fuel tank 4 through oil pipe; The outlet end of the outlet ball valve 1 of diaphragm pump 2 communicates through the filler opening of oil pipe with common rail pipe 9; The oil outlet of common rail pipe 9 communicates through the P mouth of oil pipe and 2/2-way solenoid valve 8; The A mouth of 2/2-way solenoid valve 8 communicates with the filler opening of oil sprayer 7; The relay of 2/2-way solenoid valve 8 connects with the controller pin connector of electronic control unit 5, and the input circlult of electronic control unit 5 connects with the wire harness connector of sensor wire harness 6.
The oil sprayer 7 that present embodiment adopts is as shown in Figure 2, comprises nozzle tip 10, nozzle carrier 17, nozzle body 14, stem valve 12, Returnning spring 13 and adjustment nut 15.The heart portion of nozzle body 14 is provided with taper hole 22, transitional pore 21, pilot hole 19 and reset hole 18 from left to right concentrically successively; Have 5～6 minor diameter inclined holes 20, the end of minor diameter inclined hole 20 to transitional pore 21 equably in inner end near reset hole 18 inwalls; Stem valve 12 is provided with inversed taper platform, transiting rod and the body of rod from left to right concentrically successively, and the right-hand member of the body of rod is processed with screw thread.
The left end of nozzle body 14 and right-hand member are connected with centre thread with nozzle tip 10 and nozzle carrier 17 respectively, and the left side of nozzle body 14 and right side are lined with nozzle head packing ring 11 and nozzle middle part packing ring 16 respectively; The body of rod of stem valve 12 passes the pilot hole 19 of nozzle body 14, taper hole 22 couplings of the inversed taper platform of stem valve 12 and nozzle body 14, pilot hole 19 couplings of the body of rod of stem valve 12 and nozzle body 14; Returnning spring 13 is enclosed within on the body of rod of stem valve 12, and an end of Returnning spring 13 is pressed on the inner end face of reset hole 18, and the other end is pressed on the adjustment nut 15, the scyewed joint of the body of rod right-hand member of adjustment nut 15 and stem valve 12.
In the said oil sprayer 7: the diameter of minor diameter inclined hole 9 is 1.5～2.5mm; Nozzle head packing ring 2 is copper material with the material of nozzle middle part packing ring 7; Be distributed with 3～7 little spray orifices on the head of nozzle tip 1, diameter is 1.0～2.5mm; The body of rod 16 of stem valve 3 is 0.002～0.0025mm with the coupling gap of pilot hole 12 couplings of nozzle body 5, and the body of rod 16 of stem valve 3 is 20～40mm with the coupling length of pilot hole 12 couplings of nozzle body 5.
The diaphragm pump 2 that present embodiment adopts is as shown in Figure 3, comprises outer pipe 23, outlet ball valve 1, diaphragm chamber 24, diaphragm of diaphragm pump 25, inlet ball valve 3, inlet duct 26 and plunger mechanism 27.The right-hand member of diaphragm pump 2 is equipped with plunger mechanism 27; The left end of diaphragm pump 2 is a diaphragm chamber 24; One side of diaphragm chamber 24 is provided with inlet ball valve 3; Opposite side is provided with outlet ball valve 1, and diaphragm of diaphragm pump 25 is between diaphragm chamber 24 and plunger mechanism 27, and diaphragm of diaphragm pump 25 separates the plunger coupled parts of plunger mechanism 27 and the fuel in the diaphragm chamber 24 fully.
A kind of dimethyl ether fuel injection system.Have 7～10 minor diameter inclined holes 9 equably in the inner end near reset hole 13 inwalls, the diameter of minor diameter inclined hole 9 is 0.5～1.5mm; Be distributed with 6～10 little spray orifices on the head of nozzle tip 1, diameter is 0.1～1.5mm; The body of rod 16 of stem valve 3 is 30～50mm with the coupling length of the pilot hole 12 of nozzle body 5.
All the other are with embodiment 1.
This embodiment is to rerum natura characteristics such as dimethyl ether low viscosity, high-vapor-pressure and easy atomizings; Adopt the diaphragm pump 2 that is complementary with the low pressure common rail fuel injection system as compression pump; Not only solve the kinematic pair wear problem that brings by the low viscosity of dimethyl ether, significantly reduced the leakage rate of dimethyl ether fuel again; Simultaneously,,, thereby make its resistance that overcomes pipeline, get into by the road in the fuel feeding common rail system of dimethyl ether electric-controlled injection motor sucking-off in the dimethyl ether fuel from fuel tank owing to adopt the diaphragm pump 2 that is complementary with the low pressure common rail fuel injection system as compression pump.For diaphragm pump 2; Because the diaphragm pump plunger coupled parts self has independent forced lubricating system, and plunger coupled parts and pressurized medium separate by barrier film fully, do not exist medium from plunger coupled parts clearance leakage problem; Therefore, the lubricated of diaphragm pump plunger coupled parts can be solved with wear problem completely.
This embodiment is with the conventional diesel engine high-pressure Injection Pump of the diaphragm pump 2 replacement compression pump that acts as a fuel; Can effectively avoid the pressurizeing wearing and tearing and the leakage of link place idol part; Diaphragm pump plunger coupled parts and pressurized medium are separated by barrier film fully, so do not exist medium from plunger coupled parts clearance leakage problem; In addition; Diaphragm pump self has independent forced lubricating system, and therefore, lubricated and the wear problem of diaphragm pump plunger coupled parts can be solved completely; Controlled pre-mixing combustion is become a reality, thereby solve the unmanageable technology barrier of homogeneous combustion ignition timing.
" a kind of nozzle that is used for low-viscosity fuel of internal combustion engine " that the oil sprayer 7 that this embodiment adopts has been patented for the claimant be patented technology (ZL201010143592.4); This patented technology is entered to dimethyl ether (DME) fuel the reset hole 18 of nozzle body 14 by the center hole of nozzle carrier 17; Minor diameter inclined hole 20 in nozzle body 14 gets into the transiting rod of stem valve 12 and the transitional pore formed isostasy chambers 21 of nozzle body 14; The screw-in of adjustment nut 15 or back-out can be provided with the injection starting pressure scope of oil sprayer 7; After reaching setting pressure, will overcome the pretightening force of Returnning spring 13 and push stem valve 12 back entering nozzle tips 10 open, again by the little spray orifice ejection that distributes on the nozzle tip 10; After DME fuel lost pressure, stem valve 12 was retreated under the effect of Returnning spring 13, and the inversed taper platform of dependence stem valve 12 contacts the sealing that forms DME fuel with the conical surface of 22 of the taper holes of nozzle body 14.
The oil sprayer 7 that this embodiment adopts the results showed: DME fuel has 99.8% through minor diameter inclined hole 20 nozzle body 14 of flowing through; The coupling surface flow of DME fuel through stem valve 12 and nozzle body 14 below 0.2% only arranged through nozzle body 14; Like this stem valve 12 and the coupling surface of nozzle body 14 are not washed away basically, just solved the nozzle coupling surface abrasion problem that causes because of DME fuel viscosity is low yet; Returnning spring 13 and stem valve 12 have the function of the above-mentioned conical surface wearing and tearing of automatic compensation with the conical surface contact form of nozzle body 14.The oil sprayer 7 that this embodiment adopts can also obviously alleviate the coupling surface abrasion of low-viscosity fuel of internal combustion engine nozzle; Have long working life and compensate the characteristics of above-mentioned conical surface wearing and tearing function automatically, thereby make the related injection nozzle for internal combustion engines of this embodiment be applicable to the fuel that viscosity is lower.
Therefore, this system has cost characteristics low, that implement and can make the dimethyl ether substitute fuel of minimum discharge used smoothly and promote easily.
Claims (3)
1. a dimethyl ether fuel injection system is characterized in that this ejecting system comprises diaphragm pump (2), dimethyl ether fuel tank (4), electronic control unit (5), sensor wire harness (6), oil sprayer (7), 2/2-way solenoid valve (8) and common rail pipe (9);
The entry end of the inlet ball valve (3) of diaphragm pump (2) communicates with dimethyl ether fuel tank (4) through oil pipe; The outlet end of the outlet ball valve (1) of diaphragm pump (2) communicates through the filler opening of oil pipe with common rail pipe (9); The oil outlet of common rail pipe (9) communicates through the P mouth of oil pipe and 2/2-way solenoid valve (8); The A mouth of 2/2-way solenoid valve (8) communicates with the filler opening of oil sprayer (7); The relay of 2/2-way solenoid valve (8) connects with the controller pin connector of electronic control unit (5), and the input circlult of electronic control unit (5) connects with the wire harness connector of sensor wire harness (6).
2. dimethyl ether fuel injection system according to claim 1 is characterized in that said oil sprayer (7) comprises nozzle tip (10), nozzle carrier (17), nozzle body (14), stem valve (12), Returnning spring (13) and adjustment nut (15);
The heart portion of nozzle body (14) is provided with taper hole (22), transitional pore (21), pilot hole (19) and reset hole (18) from left to right concentrically successively; Inner end near reset hole (18) inwall has 5～10 minor diameter inclined holes (20) equably, the end of minor diameter inclined hole (20) to transitional pore (21);
Stem valve (12) is provided with inversed taper platform, transiting rod and the body of rod from left to right concentrically successively, and the right-hand member of the body of rod is processed with screw thread;
The left end of nozzle body (14) and right-hand member are connected with centre thread with nozzle tip (10) and nozzle carrier (17) respectively, and the left side of nozzle body (14) and right side are lined with nozzle head packing ring (11) and nozzle middle part packing ring (16) respectively; The body of rod of stem valve (12) passes the pilot hole (19) of nozzle body (14), taper hole (22) coupling of the inversed taper platform of stem valve (12) and nozzle body (14), pilot hole (19) coupling of the body of rod of stem valve (12) and nozzle body (14); Returnning spring (13) is enclosed within on the body of rod of stem valve (12), and an end of Returnning spring (13) is pressed on the inner end face of reset hole (18), and the other end is pressed on the adjustment nut (15), the scyewed joint of the body of rod right-hand member of adjustment nut (15) and stem valve (12).
3. dimethyl ether fuel injection system according to claim 1 is characterized in that said diaphragm pump (2) comprises outer pipe (23), outlet ball valve (1), diaphragm chamber (24), diaphragm of diaphragm pump (25), inlet ball valve (3), inlet duct (26) and plunger mechanism (27);
The right-hand member of diaphragm pump (2) is equipped with plunger mechanism (27); The left end of diaphragm pump (2) is diaphragm chamber (24); One side of diaphragm chamber (24) is provided with inlet ball valve (3); Opposite side is provided with outlet ball valve (1), and diaphragm of diaphragm pump (25) is positioned between diaphragm chamber (24) and the plunger mechanism (27), and diaphragm of diaphragm pump (25) separates the plunger coupled parts of plunger mechanism (27) and the fuel in the diaphragm chamber (24) fully.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100738825A CN102606345A (en) | 2012-03-20 | 2012-03-20 | Dimethyl ether fuel injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100738825A CN102606345A (en) | 2012-03-20 | 2012-03-20 | Dimethyl ether fuel injection system |
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| CN102606345A true CN102606345A (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100738825A Pending CN102606345A (en) | 2012-03-20 | 2012-03-20 | Dimethyl ether fuel injection system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103133161A (en) * | 2013-03-15 | 2013-06-05 | 周继光 | Engine ether fuel feeding control system |
| CN105402038A (en) * | 2015-12-14 | 2016-03-16 | 湖北汽车工业学院 | Premix valve control device of dimethyl ether premixing combustion system |
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| JP2007120422A (en) * | 2005-10-28 | 2007-05-17 | Isuzu Motors Ltd | Diesel engine using dimethyl ether as fuel |
| JP2010196471A (en) * | 2009-02-20 | 2010-09-09 | Isuzu Motors Ltd | Fuel supply system, diesel engine, and method for controlling engine start |
| CN101858290A (en) * | 2010-04-06 | 2010-10-13 | 武汉科技大学 | Nozzle for low-viscosity fuel of internal combustion engine |
| CN202673522U (en) * | 2012-03-20 | 2013-01-16 | 武汉科技大学 | Dimethyl ether fuel diaphragm pump low-pressure spraying system |
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2012
- 2012-03-20 CN CN2012100738825A patent/CN102606345A/en active Pending
Patent Citations (4)
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| JP2007120422A (en) * | 2005-10-28 | 2007-05-17 | Isuzu Motors Ltd | Diesel engine using dimethyl ether as fuel |
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| CN101858290A (en) * | 2010-04-06 | 2010-10-13 | 武汉科技大学 | Nozzle for low-viscosity fuel of internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103133161A (en) * | 2013-03-15 | 2013-06-05 | 周继光 | Engine ether fuel feeding control system |
| CN105402038A (en) * | 2015-12-14 | 2016-03-16 | 湖北汽车工业学院 | Premix valve control device of dimethyl ether premixing combustion system |
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Application publication date: 20120725 |