EP0482136A1 - Vorrichtung zur einspritzung eines brennstoff-gas-gemisches. - Google Patents
Vorrichtung zur einspritzung eines brennstoff-gas-gemisches.Info
- Publication number
- EP0482136A1 EP0482136A1 EP91906604A EP91906604A EP0482136A1 EP 0482136 A1 EP0482136 A1 EP 0482136A1 EP 91906604 A EP91906604 A EP 91906604A EP 91906604 A EP91906604 A EP 91906604A EP 0482136 A1 EP0482136 A1 EP 0482136A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- valve
- fuel
- spray end
- mixing line
- 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.)
- Granted
Links
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
- F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
- F02M69/08—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by the fuel being carried by compressed air into main stream of combustion-air
Definitions
- the invention relates to a device for injecting a fuel-gas mixture according to the preamble of the main claim.
- a device for injecting a fuel-gas mixture is already known, in which a fuel injection valve is surrounded by a graduated longitudinal bore of a valve seat. Downstream of an injection end of the fuel injection valve, a mixing line is formed in the valve receptacle, which is connected upstream via a gas gap formed between the injection end and the longitudinal bore to a gas ring channel connected to a gas source.
- this device has the disadvantage that the gas is supplied to the gas ring channel by means of a single line and flows downstream through the gas gap into the mixing line.
- the size of the gas gap and the quality of the centering of the fuel injector is also dependent on the length and shape tolerances of the fuel injector and the longitudinal bore of the valve receptacle.
- the device according to the invention with the characterizing features of the main claim has the advantage that the fuel jet is not asymmetrically influenced by the symmetrical supply of the gas through the at least two opposing gap openings of the gas gap in the mixing line. This reduces the risk of a film of fuel forming on the walls of the mixing line and ensures the formation of a largely homogeneous fuel-gas mixture.
- the device has a particularly compact design and can be manufactured in a simple manner.
- valve receptacle For the simplest possible design of the valve receptacle, it is advantageous if two gas gaps start from the gas ring channel.
- the center lines of the two gas gaps opening into the mixing line with opposing gap openings lie in one plane through the longitudinal axis of the valve, so that a uniform and symmetrical inflow of the gas through the gas gaps to the gap openings opening into the mixing line takes place.
- the gas ring channel is at least semicircular.
- the contact surface of the longitudinal bore and the spray end of the fuel injector are frustoconically tapered radially towards the valve longitudinal axis, so that the position of the spray end to the mixing line is determined in a simple manner directly at the spray end itself.
- the gas gaps are inclined in the downstream direction towards the longitudinal axis of the valve, so that the gas flowing downstream entrains fuel which may be deposited on the wall of the mixing line at high speed.
- a regulator gap branches off from the mixing line, which is formed between the spray end and the contact surface of the valve receptacle and which is connected to a pressure regulator, so that the measurement of the pressure is as close as possible to the spray end of the fuel injector he follows. This is necessary since the pressure regulator regulates the fuel pressure or the pressure of the gas supplied relative to the spray point.
- FIG. 1 shows the exemplary embodiment with a partially illustrated fuel injection valve and with a partially illustrated valve receptacle
- FIG. 2 shows a section along the line II-II in FIG. 1
- FIG. 3 shows a view of the valve receptacle in the direction of the arrow X in FIG. 1.
- the device shown in FIG. 1, for example, for injecting a fuel-gas mixture into an intake pipe or directly into a mixture-compressing, externally ignited internal combustion engine has a fuel injection valve 1 which is frustoconical in the direction of a longitudinal valve axis 2 has a tapering spray end 3 and a valve receptacle 4 which has a stepped longitudinal bore 5 and extends concentrically with the valve longitudinal axis 2 and surrounds the spray end 3.
- the spray end 3 of the fuel injection valve 1 lies partly against a truncated cone-shaped bearing surface 6 of the valve receptacle 4 which forms a section of the longitudinal bore 5 and tapers radially towards the valve longitudinal axis 2 and starts from a cylinder section 7 of the longitudinal bore 5, the Contact surface 6 and the frustoconical end 3 run parallel to each other.
- the frustoconical design of the spray end 3 and the contact surface 6 of the valve receptacle 4 result in a simple, but nevertheless very exact centering of the spray end 3 of the fuel injection valve 1 in the longitudinal bore 5.
- the fuel injection valve 1 has a valve closing body 9 which interacts with a fixed valve seat 8 on. Downstream of the valve seat 8, the spray end 3 of the fuel injection valve 1 has, for example, a spray opening 10 which is concentric with the longitudinal axis 2 of the valve, but a plurality of spray openings can also be provided.
- a cylindrical mixing line 12 is formed, for example, downstream of the spray end 3 of the fuel injector 1, into which the fuel is injected through the spray opening 10 of the fuel injector 1.
- the mixing line 12 can both in an injection line, which the fuel-gas mixture immediately one individual cylinders of the internal combustion engine or a single position in the intake pipe also lead to a mixture distributor which distributes the fuel-gas mixture to the individual cylinders of the internal combustion engine and by means of a number of injection lines corresponding to the number of cylinders the individual cylinders or the individual locations in the intake pipe.
- valve receptacle 4 Between the frustoconical spray end 3 and the conically tapered contact surface 6 of the valve receptacles 4 are at the end of the contact surface 6 facing away from the mixing line 12, as also from FIG. 3, which shows a view of the valve holder 4 in the direction of the arrow X in FIG. 1
- a semicircular gas ring channel 15 and two gas gaps 16 extending from it, the center lines 17 of which lie in one plane through the valve longitudinal axis 2 are formed.
- the valve receptacle 4 has a semicircular groove 21 in the contact surface 6, which at its two ends merges into a radial groove 22 running along the center line 17.
- both the semicircular groove 21 and the two radial grooves 22 can in addition to the rectangular shown in the figures, any other z. B. have semicircular cross-sectional shape.
- the two gas gaps 16 open into the mixing line 12 with gap openings 19 lying opposite one another, so that the radial forces exerted on the fuel jet centrally sprayed through the spray opening 10 and caused by the gas supply are canceled out and the fuel jet is not deflected.
- further pairs of gas gaps 16 are formed between the frustoconical injection end 3 and the conically tapering contact surface 6 of the valve receptacle 4 in such a way that the gap openings 19 of the respective pair of gas gaps 16 open into the mixing line 12 opposite one another and that respective center lines 17 of the gas gaps 16 lie in one plane through the valve longitudinal axis 2.
- two additional grooves 18 are formed, which e.g. branch off from the radial groove 22 and open into the mixing line 12.
- the supply to the individual pairs of gas gaps 16 can also take place via a separate gas ring channel 15 in order to achieve a more uniform distribution of the supplied gas to the individual gas gaps 16 and a uniform flow rate into the mixing line 12. It may be necessary for this if the gas ring channels 15 and / or the gas gaps 16 run in different levels of the valve receptacle 4.
- the gas gaps 16 open into the mixing line 12 due to the conically tapering contact surface 6 in the downstream direction towards the longitudinal valve axis 2. This improves the formation of the fuel-gas mixture, since the gas flowing downstream any fuel that is deposited on the wall of the mixing line 12 is entrained at high speed. In addition, the risk of an asymmetrical influence on the fuel jet is particularly low because the gas flows into the mixing line 12 in addition to the radial direction component with an axial direction component.
- the gas gaps 16 it is also possible for the gas gaps 16 to have a cross-sectional area that changes in the direction of the gap openings 19. A for example, reducing the cross-sectional area towards the stomata 19 causes an additional acceleration of the gas, so that the gas flows at a higher speed through the stomata 19 into the mixing line 12 and improves the formation of the fuel-gas mixture there.
- the exact and symmetrical design of the gas gaps 16 serving the gas metering and the gas supply to the mixing line 12 is the exact centering of the spray end 3 of the fuel injection valve 1 in the longitudinal bore 5 of the valve receptacles 4.
- FIG. 2 shows a section along the line II-II in FIG. 1.
- the gas is supplied to the semicircular gas ring channel 15 by means of a gas supply channel 25 formed in the valve receptacle 4, which is connected to a gas source 26.
- the gas supply channel 25 opens with its supply channel opening 27 in a plane perpendicular to the two center lines 17 of the gas gaps 16 and perpendicular to the contact surface 6 centrally in the gas ring channel 15.
- Both fresh air and an inert gas as well as a mixture of both can be used as the gas for forming the fuel-gas mixture.
- the fresh air is branched off, for example, from the intake pipe in front of an arbitrarily adjustable throttle element and is fed directly to the gas supply anal 25.
- As an inert gas z. B. use the exhaust gas of the internal combustion engine, so that the exhaust gas recirculation reduces the pollutant emissions of the internal combustion engine. From the mixing line 12, as shown in FIGS.
- valve receptacles 4 branches off between the truncated cone-shaped spray end 3 and the conically tapering contact surface 6 of the valve receptacles 4 in the form of a controller gap 30 formed in the contact surface 6, which over a regulator channel 32 formed in the valve receptacle 4 is connected to a pressure regulator 34 which regulates the fuel pressure relative to the spraying point 31 of the fuel injector 1.
- Fuel is supplied to the pressure regulator 34 by means of a fuel feed pump 35, the fuel return takes place via a return line 36 to the fuel storage container 37.
- the regulator gap 30 is formed, for example, opposite the gas supply channel 25 in the plane perpendicular to the two center lines 17 of the gas gap 16. For an exact control of the fuel pressure, it is necessary that the pressure in the mixing tube 12 is measured particularly close to the spray end 3.
- the pressure regulator 34 regulates the supply of the gas and, for this purpose, acts on a gas feed pump 33 or another pressure generating device.
- the longitudinal bore 5, the gas supply duct 25 and the regulator duct 32 are formed by machining.
- the grooves 21, 22, 29 of the gas ring channel 15, the gas gap 16 and the regulator gap 30 in the conically tapering contact surface 6 of the valve receptacle 4 can be formed by stamping to reduce the manufacturing costs.
- a further possibility for producing a valve receptacle 4 according to the invention is to design the valve receptacles 4 as plastic parts, so that particularly low manufacturing costs result.
- the abutment of the injection end 3 of the fuel injection valve 1 on the abutment surface 6 of the valve receptacle 4 and the formation of the gas ring channel 15, from which two gas gaps 16 with opposing gap openings 19 opening into the mixing line 12 extend, between the discharge end 3 and the Contact surface 6 enables a symmetrical supply of the gas to the centrally sprayed fuel jet and thus the formation of a largely homogeneous fuel-gas mixture.
- the device according to the invention for injecting a fuel-gas mixture has a compact design.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4014245A DE4014245A1 (de) | 1990-05-04 | 1990-05-04 | Vorrichtung zur einspritzung eines brennstoff-gas-gemisches |
DE4014245 | 1990-05-04 | ||
PCT/DE1991/000283 WO1991017358A1 (de) | 1990-05-04 | 1991-04-04 | Vorrichtung zur einspritzung eines brennstoff-gas-gemisches |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0482136A1 true EP0482136A1 (de) | 1992-04-29 |
EP0482136B1 EP0482136B1 (de) | 1995-08-02 |
Family
ID=6405659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91906604A Expired - Lifetime EP0482136B1 (de) | 1990-05-04 | 1991-04-04 | Vorrichtung zur einspritzung eines brennstoff-gas-gemisches |
Country Status (6)
Country | Link |
---|---|
US (1) | US5161511A (de) |
EP (1) | EP0482136B1 (de) |
JP (1) | JP3365631B2 (de) |
AU (1) | AU7550991A (de) |
DE (2) | DE4014245A1 (de) |
WO (1) | WO1991017358A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5632253A (en) * | 1996-04-17 | 1997-05-27 | Paul; Marius A. | Universal combustion system |
US6666192B2 (en) | 2001-11-14 | 2003-12-23 | Delphi Technologies, Inc. | Fluid control valve and system |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2623786A (en) * | 1948-10-01 | 1952-12-30 | Rudolf L Wille | Method for atomizing fuel and nozzle for carrying out this method |
JPS58195058A (ja) * | 1982-05-07 | 1983-11-14 | Toyota Motor Corp | 燃料噴射式内燃機関のエアアシスト装置 |
DE3609798A1 (de) * | 1985-03-27 | 1986-10-02 | Volkswagen AG, 3180 Wolfsburg | Kraftstoffeinspritzeinrichtung |
US4708117A (en) * | 1986-04-14 | 1987-11-24 | Colt Industries Inc. | Multi-point fuel injection apparatus |
US4982716A (en) * | 1988-02-19 | 1991-01-08 | Toyota Jidosha Kabushiki Kaisha | Fuel injection valve with an air assist adapter for an internal combustion engine |
DE3808396C2 (de) * | 1988-03-12 | 1995-05-04 | Bosch Gmbh Robert | Kraftstoffeinspritzventil |
FR2635827B1 (fr) * | 1988-08-30 | 1993-11-26 | Solex | Dispositif d'injection de combustible a chambre d'aeration |
JP2848491B2 (ja) * | 1988-11-16 | 1999-01-20 | 株式会社日立製作所 | 燃料噴射制御装置 |
US5102054A (en) * | 1989-04-12 | 1992-04-07 | Fuel Systems Textron Inc. | Airblast fuel injector with tubular metering valve |
JPH03107568A (ja) * | 1989-09-22 | 1991-05-07 | Aisin Seiki Co Ltd | 燃料噴射装置 |
-
1990
- 1990-05-04 DE DE4014245A patent/DE4014245A1/de not_active Withdrawn
-
1991
- 1991-04-04 DE DE59106134T patent/DE59106134D1/de not_active Expired - Fee Related
- 1991-04-04 EP EP91906604A patent/EP0482136B1/de not_active Expired - Lifetime
- 1991-04-04 US US07/778,193 patent/US5161511A/en not_active Expired - Fee Related
- 1991-04-04 JP JP50673091A patent/JP3365631B2/ja not_active Expired - Lifetime
- 1991-04-04 WO PCT/DE1991/000283 patent/WO1991017358A1/de active IP Right Grant
- 1991-04-04 AU AU75509/91A patent/AU7550991A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9117358A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4014245A1 (de) | 1991-11-07 |
AU7550991A (en) | 1991-11-27 |
JPH04507128A (ja) | 1992-12-10 |
US5161511A (en) | 1992-11-10 |
DE59106134D1 (de) | 1995-09-07 |
EP0482136B1 (de) | 1995-08-02 |
JP3365631B2 (ja) | 2003-01-14 |
WO1991017358A1 (de) | 1991-11-14 |
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