EP0769101B1 - Verfahren zur verbesserung der brennstoffzerstäubung bei verbrennungsmaschinen - Google Patents
Verfahren zur verbesserung der brennstoffzerstäubung bei verbrennungsmaschinen Download PDFInfo
- Publication number
- EP0769101B1 EP0769101B1 EP95922392A EP95922392A EP0769101B1 EP 0769101 B1 EP0769101 B1 EP 0769101B1 EP 95922392 A EP95922392 A EP 95922392A EP 95922392 A EP95922392 A EP 95922392A EP 0769101 B1 EP0769101 B1 EP 0769101B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- air
- chamber
- degassing
- bubbles
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 71
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims description 23
- 238000005507 spraying Methods 0.000 title 1
- 239000000203 mixture Substances 0.000 claims abstract description 42
- 238000007872 degassing Methods 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 3
- 239000002828 fuel tank Substances 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 abstract description 2
- 239000002245 particle Substances 0.000 abstract description 2
- 231100000719 pollutant Toxicity 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 abstract description 2
- 239000004071 soot Substances 0.000 abstract description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 9
- 238000013461 design Methods 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007970 homogeneous dispersion Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M33/00—Other apparatus for treating combustion-air, fuel or fuel-air mixture
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M71/00—Combinations of carburettors and low-pressure fuel-injection apparatus
- F02M71/02—Combinations of carburettors and low-pressure fuel-injection apparatus with fuel-air mixture being produced by the carburettor and being compressed by a pump for subsequent injection into main combustion-air
Definitions
- the present invention relates to a method for Mixing air into fuel in an internal combustion engine before being introduced into the combustion chamber, which creates a Improvement in fuel atomization is to be achieved.
- FR-A-2'501'793 shows a solution in which in a regulator is arranged in the fuel intake line Fuel and air mixed. This principle is in improved execution have been published in WO 92/13188.
- the patent US-A-4 376 423 shows an apparatus and a method for Enrich fuel with a gas for use with an internal combustion engine.
- a saturator includes one porous body in a container. Fuel flows around the porous body. This causes gas to enter through this porous body pressed the fuel. The gas is all over the surface of the porous body to the fuel, being small Gas bubbles are formed. These gas bubbles are partly in the Fuel picked up and transported, the other part they form an excess fuel-gas mixture. thats why a line is provided through which the excess Fuel-gas mixture is suctioned off and a fuel-gas foam trap fed into the cycle for later recycling becomes.
- the simplest solution in this regard is achieved by the selective degassing by introducing the Air-fuel mixture takes place in a chamber in which the mixture under the influence of gravity during a Minimum time stops and larger bubbles rise, causing the mixture is partially degassed, while small bubbles in the Mixture remain.
- the Residence time depends on the one hand on the fuel flow and on the other hand the size of the chamber. You choose optimally the dwell time so that finally only in the mixture Gas bubbles remain, which are a size in the micrometer range exhibit. It is interesting that this selectively degasses Mixture advantageously less than one volume percent air should contain. In extreme cases, values were measured at where the air was less than a volume percent.
- the number of bubbles in the selectively degassed mixture very high.
- this can be more than a thousand bubbles per cubic millimeter.
- Such a selectively degassed mixture has the enormous advantage that it leads to incredibly stable operating conditions and the measurement results also from the arrangement of the Fuel lines become completely independent. This leads to, that the arrangement of the air admixture as well as the selective Degassing both before and after the fuel pump can be arranged.
- the air is added in the simplest way using a Venturi tube with subsequent mixing section.
- the air intake for the air admixture always can be taken directly or indirectly from the area of the chamber. Further advantageous procedural precautions go from the dependent claims and their meaning explained in the description below.
- FIGS. 1 to 4 The different possibilities, the inventive The best way to implement processes is from the four schematically represented variants according to FIGS. 1 to 4 forth.
- the fuel comes from tank 1 in the version 1 directly into the intake pipe 2 in accordance with FIG device designated as a whole, and from there via a fuel pump 4 to the engine 5.
- the air admixing device 6 is arranged in the device 3 itself. From there it gets Mixture as fuel and air in a chamber 7, which as Degassing chamber is called.
- a float 8 In the degassing chamber 7 there is a float 8 with the appropriate means is equipped to according to the fuel level in the chamber 7 either with a lower sealing cone 9 the lower exit 10 to close the chamber 7 or by means of an upper one Actuating pin 11 to act on an inlet valve 12 what freshness through an outside filter 13 can flow from the atmosphere directly into the chamber 7.
- FIG. 1 works Air admixing device 6 according to the venturi tube principle. The Air sucked in by the flow is here directly via the Line 14 sucked out of the degassing chamber 7.
- All variants are degassed by the fact that Fuel-air mixture for a time in chamber 7 rests and existing air bubbles rise. The bigger the air bubbles are, the faster they rise.
- the air is sucked in directly from the degassing chamber 7.
- the chamber 7 is also largely filled the fuel-air mixture, so located the float 8 in an upper position and the Actuating pin 11 opens a shut-off valve 12 and sets the connection to an outside air filter 13 forth.
- the feed pump 4 sucks a portion of the Fuel-air mixture after, so now flows through the filter 13 air into the chamber 7, the float 8 sinks again from time to time, the negative pressure now increases fuel drawn in from the tank 1 via the suction line 2.
- the lower formed from elements 9 and 10 in Figures 3 and 4 The seal is used to ensure that the Fuel delivery pump 4, the degassing chamber 7 not too far can drain.
- a separate air pump 14 is also provided here. Either Air and fuel are therefore in the Air admixture 6 under pressure with each other mixed. In this case too is again the air admixing device 6 below Provide mixing section.
- the variant 4 the air admixing device 6 from the device 3 arranged separately.
- the fuel delivery pump 4 is now between the air admixing device 6 and the Degassing chamber 7 arranged.
- the air is added now again using the Venturi tube principle.
- the Operation of the degassing chamber 7 with the float 8 corresponds absolutely to the previously described versions.
- FIGS. 5 through 7 show DAs Device 3 consists of a head plate 30 and one opposite base plate 31.
- the two plates 30,31 are spaced from each other by a cylindrical wall 32 held.
- the cylindrical wall 32 encloses the internal degassing chamber 7 with the one located therein Float 8.
- Guide rods 33, both in the base plate 31 as well as in the head plate 30 form a Kind of cage for the swimmer. This is so far positioned so that the float is always exactly centered axially is led. This guarantees that at the bottom or topmost position of the float 8 thereof Seal tips the air intake opening in the head plate or the mixture outlet opening in the base plate 31 each seal tightly.
- the fuel is here by means of the fuel feed pump 4 via line 2 to Air admixing device 6 performed on the top plate 30 is arranged. This is where the air is mixed in supplied from the air pump 14 via the air supply line 60 becomes.
- the fuel-air mixture gets into a Mixing section 34, which in principle consists of a tube with built-in chicane 35, with which an in-depth mix of Fuel and air is achieved. From the mixing section 34 the mixture passes through two connected holes 37 in the Base plate 31 to a supply line 36, which is already as first separation section works. From the supply line 36, the leads from the base plate 31 to the head plate 30 again the fuel-air mixture finally via a Feed hole 38 in the top plate to a vertical Inlet bore 39 through which the mixture finally into the Chamber 7 arrives.
- the design plays a role for the method according to the invention of device 1 does not matter.
- the principle of the invention is based only on the principle consideration that after Possibility only a homogeneous dispersion of fuel and Air should be conveyed while avoiding the supply of air larger air bubbles in the combustion chamber. this will according to the process through partial, selective degassing achieved.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Jet Pumps And Other Pumps (AREA)
- Coating By Spraying Or Casting (AREA)
- Feeding And Controlling Fuel (AREA)
Description
- Figur 1
- eine schematische Darstellung eines Gerätes zur Durchführung des Verfahrens, welches der Ansaugleitung zwischen Kraftstofförderpumpe und Kraftstofftank angeordnet ist und die Luftbeimischung auf dem Venturirohr beruhend erfolgt, während
- Figur 2
- dieselbe Anordnung zeigt, wobei jedoch die Luftbeimischung mittels einer zusätzlichen Luftpumpe erfolgt.
- Figur 3
- zeigt die Variante nach Figur 2, wobei jedoch die Kraftstofförderpumpe vor dem Gerät zur Beimischung der Luft liegt.
- Figur 4
- stellt eine Variante dar, bei der die Luftbeimischung vor der Kraftstofförderpumpe liegt und die Kammer zur Entgasung davon getrennt nachfolgend angeordnet ist.
- Figur 5
- zeigt einen mittigen Längsschnitt durch ein Gerät zur Ausübung des Verfahrens gemäss der schematischen Zeichnung nach Figur 3, während
- Figur 6
- eine Aufsicht darauf und
- Figur 7
- einen Teilschnitt entlang der Linie A-A nach Figur 6 zeigt.
Claims (7)
- Verfahren zur Beimischung von Luft in Kraftstoff einer Verbrennungskraftmaschine vor der Einleitung in die Verbrennungskammer, wobei nach der Beimischung eine teilweise Entgasung stattfindet, bei welcher überschüssige Brennstoffblasen von dem mit Luft angereicherten Brennstoff abgeschieden werden,
dadurch gekennzeichnet, dass
das Einführen der Luft in der Kraftstoff in einem Venturirohr als Luftbeimischungseinrichtung (6) vorgenommen wird, wonach das Brennstoff-Luft Gemisch in eine Mischstrecke (34) mit eingebauter Schikane (35) gelangt, worauf die Abscheidung der überschüssigen Brennstoffblasen in einer Kammer (7), in welcher sich das Kraftstoff-Luft-Gemisch während einer Mindestzeit aufhält, die genügt, um grössere Blasen aus dem Kraftstoff-Luft-Gemisch austreten zu lassen, erfolgt, wodurch das Kraftstoff-Luft-Gemisch in Abhängigkeit der Grösse der Blasen selektiv entgast wird. - Verfahren nach Anspruch 1, dadurchgekennzeichnet, dass sowohl die Luftbeimischung, als auch die selektive Entgasung im Bereich der Saugleitung zwischen Kraftstofftank und Kraftstoffpumpe erfolgt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass sowohl die Luftbeimischung, als auch die selektive Entgasung im Bereich der Druckleitung zwischen Kraftstoffpumpe und Verbrennungsmaschine erfolgt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Luftansaugung direkt oder indirekt immer aus dem Bereich der Kammer, in der die Entgasung stattfindet, erfolgt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass die Zufuhr der beizumischenden Frischluft in Abhängigkeit des Füllstandes des Kraftstoff-Luftgemisches in der Entgasungskammer erfolgt.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass eine Abflussöffnung für das Kraftstoff-Luftgemisch aus der Entgasungskammer in Abhängigkeit des dort herrschenden Füllstandes gesteuert wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, dass die mittlere Verweilzeit des Kraftstoff-Luftgemisches in der Entgasungskammer mindestens 30 sec. beträgt.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH2129/94 | 1994-07-04 | ||
CH212994 | 1994-07-04 | ||
CH212994 | 1994-07-04 | ||
PCT/CH1995/000148 WO1996001366A1 (de) | 1994-07-04 | 1995-06-30 | Verfahren zur verbesserung der brennstoffzerstäubung bei verbrennungsmaschinen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0769101A1 EP0769101A1 (de) | 1997-04-23 |
EP0769101B1 true EP0769101B1 (de) | 2000-02-02 |
Family
ID=4226562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95922392A Expired - Lifetime EP0769101B1 (de) | 1994-07-04 | 1995-06-30 | Verfahren zur verbesserung der brennstoffzerstäubung bei verbrennungsmaschinen |
Country Status (6)
Country | Link |
---|---|
US (1) | US5829417A (de) |
EP (1) | EP0769101B1 (de) |
AT (1) | ATE189505T1 (de) |
AU (1) | AU2730795A (de) |
DE (1) | DE59507747D1 (de) |
WO (1) | WO1996001366A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6273072B1 (en) | 2000-02-09 | 2001-08-14 | Paul E. Knapstein | Fuel system apparatus and method |
CA2324533A1 (en) | 2000-10-27 | 2002-04-27 | Carl Hunter | Oxygen enrichment in diesel engines |
JP2009085048A (ja) * | 2007-09-28 | 2009-04-23 | Honda Motor Co Ltd | マイクロバブル発生装置 |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1447316A (fr) * | 1965-06-15 | 1966-07-29 | Sibe | Perfectionnements apportés aux dispositifs d'injection de combustible dans la tubulure d'admission d'un moteur à combustion interne |
DE2639920A1 (de) * | 1976-09-04 | 1978-03-09 | Volkswagenwerk Ag | Kraftstoff-einspritzeinrichtung |
DE2900459A1 (de) * | 1979-01-08 | 1980-07-17 | Volkswagenwerk Ag | Einrichtung zur kontinuierlichen einspritzung eines aus kraftstoff und luft bestehenden gemisches in die ansaugleitung einer brennkraftmaschine |
US4426984A (en) * | 1980-01-14 | 1984-01-24 | Gilbert Jack J | Apparatus for entraining gasoline in air for use in an internal combustion engine |
JPS6033992B2 (ja) * | 1981-02-14 | 1985-08-06 | 工業技術院長 | デイ−ゼルエンジンの燃料供給方法及び装置 |
FR2501793B1 (fr) * | 1981-03-13 | 1986-08-01 | Ricou Bernard | Methode et dispositif pour atomiser le combustible des appareils et vehicules a combustion |
US4376423A (en) * | 1981-06-08 | 1983-03-15 | William C. Knapstein | Method and apparatus for saturating a liquid fuel with a gas and an internal combustion engine |
US4524748A (en) * | 1982-06-11 | 1985-06-25 | Giannotti Hugo V | Apparatus for separating and re-circulating oversize fuel particles in spark-ignition engines |
US5054453A (en) * | 1987-01-27 | 1991-10-08 | James M. Deimen | Mobile fuel tank vapor emission control system and method |
AU1161692A (en) * | 1991-01-21 | 1992-08-27 | Epro Ag | Process and device for improving the atomisation of fuel in internal combustion engines |
US5427077A (en) * | 1994-04-07 | 1995-06-27 | Gasifier Corporation | Apparatus for delivering a volatile combustible vapor and atmospheric air mixture to internal combustion engines |
US5655505A (en) * | 1994-04-22 | 1997-08-12 | Electro-Mechanical R & D Corp. | Apparatus and method for improving fuel efficiency of gasoline engines |
US5522368A (en) * | 1994-04-22 | 1996-06-04 | Electro-Mechanical R & D Corp. | Apparatus and method for improving fuel efficiency of diesel engines |
-
1995
- 1995-06-30 AU AU27307/95A patent/AU2730795A/en not_active Abandoned
- 1995-06-30 DE DE59507747T patent/DE59507747D1/de not_active Expired - Fee Related
- 1995-06-30 US US08/765,184 patent/US5829417A/en not_active Expired - Fee Related
- 1995-06-30 WO PCT/CH1995/000148 patent/WO1996001366A1/de active IP Right Grant
- 1995-06-30 AT AT95922392T patent/ATE189505T1/de not_active IP Right Cessation
- 1995-06-30 EP EP95922392A patent/EP0769101B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
ATE189505T1 (de) | 2000-02-15 |
AU2730795A (en) | 1996-01-25 |
US5829417A (en) | 1998-11-03 |
WO1996001366A1 (de) | 1996-01-18 |
EP0769101A1 (de) | 1997-04-23 |
DE59507747D1 (de) | 2000-03-09 |
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