WO2007051720A1 - Moteur a combustion interne - Google Patents
Moteur a combustion interne Download PDFInfo
- Publication number
- WO2007051720A1 WO2007051720A1 PCT/EP2006/067598 EP2006067598W WO2007051720A1 WO 2007051720 A1 WO2007051720 A1 WO 2007051720A1 EP 2006067598 W EP2006067598 W EP 2006067598W WO 2007051720 A1 WO2007051720 A1 WO 2007051720A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- collector
- combustion engine
- internal combustion
- fuel
- engine according
- Prior art date
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 58
- 239000000446 fuel Substances 0.000 claims abstract description 55
- 238000002347 injection Methods 0.000 claims abstract description 41
- 239000007924 injection Substances 0.000 claims abstract description 41
- 239000007921 spray Substances 0.000 claims description 5
- 230000004323 axial length Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000010304 firing Methods 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 8
- 238000002360 preparation method Methods 0.000 abstract description 6
- 238000000265 homogenisation Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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
- F02M69/04—Injectors peculiar thereto
- F02M69/042—Positioning of injectors with respect to engine, e.g. in the air intake conduit
- F02M69/044—Positioning of injectors with respect to engine, e.g. in the air intake conduit for injecting into the intake conduit downstream of an air throttle valve
Definitions
- the invention relates to an internal combustion engine, according to the preamble of claim 1.
- a known internal combustion engine with a central injection ⁇ system also known as mono-jetronic or mono motronic, (Bosch, Automotive Handbook, 23rd Edition, Vieweg 1999, ISBN 3-528-03876-4, page 463, right image and text) has an electromagnetic fuel injection valve controlled by an engine control unit, which is disposed in an air intake manifold and injects fuel into the airflow.
- the fuel injection takes place upstream of a arranged in the intake manifold throttle for operating point dependent throttling of the air flow and directed in the flow direction of the air flow to the throttle.
- Downstream of the throttle the intake manifold branches into individual intake manifolds. Each intake manifold opens in an intake valve controllable inlet of a combustion cylinder of the multi-cylinder internal combustion engine.
- the inventive internal combustion engine having the features of claim 1 has the advantage that a high differential speed between the injected fuel and the intake air is formed by the injection of the fuel against the flow direction of the air flow in the air intake manifold. This high differential speed leads to a rapid
- Intake manifold downstream of the throttle device funnel-shaped expanded to a cylindrical intake manifold, in which remote from the throttle device, closed end face the branch points of leading to the inlet of the combustion cylinder suction pipes are.
- the injection valve is arranged centrally between the branching points of the intake pipes formed in the end face of the collector with an injection direction pointing in the axial direction of the collector.
- the injection valve is designed so that it sprays a conically widening fuel jet whose
- Cone angle is maximally dimensioned for maximum mixing of the fuel spray with intake air, preferably amounts to large 90 °.
- the inner diameter of the collector is adjusted to the cone angle of the sprayed fuel jet cone so that the inner walls of the collector little or no Be wetted fuel.
- the axial length of the collector is equal to or greater than the spray range of the fuel jet.
- the drawing shows a detail of a four-cylinder internal combustion engine with a fuel injection system, shown schematically.
- combustion ⁇ machine has an engine block 11 with four combustion ⁇ cylinders, in which in a known manner in each case a reciprocating piston is guided axially displaceable.
- the combustion cylinders are covered by a cylinder head 12, which includes a combustion chamber in each combustion cylinder together with the reciprocating piston.
- Each combustion cylinder has at least one inlet formed in the cylinder head 12 and an outlet formed in the cylinder head 12. Inlets and outlets are controlled by gas exchange valves.
- gas exchange valves In the drawing, only the four inlets 13 of the total of four combustion cylinders are shown, via which the combustion chambers in the combustion cylinders are successively filled with a gaseous fuel-air mixture, wherein the gas full amount is controlled by the gas exchange valves associated with the inlets 13.
- the fuel injection system has an air intake 15, an in Air intake 15 arranged throttle device 16 which is formed in the exemplary embodiment as a throttle valve, and an electromagnetic fuel injection valve 17 which is supplied via a fuel pump 18 with fuel from a fuel tank 19 and is electrically controlled by a control unit 20.
- the air intake 15 extends downstream of the throttle device 16 funnel-shaped to a larger diameter, cylindrical intake manifold header 21, which is closed at its end facing away from the throttle device 16 end of an end face 211. From the end face 211 of the collector 21 drove individual intake manifolds 22 to each inlet 13 of a combustion cylinder.
- the suction pipes 22 communicate with the interior of the collector 21 at the branch points from the collector 21 via openings 23 in the end face 211 and, on the other hand, in the respective inlet 13 in the cylinder head 12.
- the suction pipes 22 are thus associated with the openings 23. that the branching points of those intake pipes 22 are diametrically opposed to each other, which lead to the successive combustion cylinders or their inlets 13 in the ignition sequence.
- four-cylinder engine with a cylinder numbering 1, 2, 3 and 4 so the openings 23 of the suction tubes 22 in the end face 211 of the intake manifold 21 in the order 1, 3, 2 and 4 to a bolt circle in the same Spaced apart.
- the fuel injection valve 17 is arranged centrally between the existing in the end face 211 openings 23 of the intake manifold branch points with pointing in the axial direction of the collector 21 injection direction.
- the injection direction of the injection valve 17 is opposite to the direction of flow of the air flow in the intake manifold 15, which is indicated in the drawing by the arrow 24.
- the fuel injection valve 17 injects a conically widening fuel jet 25 into the intake air flowing into the collector 21 via the throttle device 16.
- the dimensions of the collector 21 and the opening angle of the fuel jet cone are coordinated so that the cylinder wall 212 of the collector 21 is not or only slightly wetted with fuel.
- the axial length of the collector 21 depends on the range of the fuel jet cone. For a good homogenization of the fuel in the intake air, the opening angle of the
- Fuel jet cone 25 as large as possible, for example, selected large 90 °. If the beam penetration in the collector 21 is approximately 100 mm, then preferably the axial length of the cylindrical part of the collector 21, that is to say without the funnel-shaped section, is also selected to be approximately 100 mm. The total volume of the collector 21, including the funnel-shaped part, is preferably selected to be approximately twice as large as the sum of the cubic capacity of all four combustion cylinders of the internal combustion engine.
- the collector 21 is made of metal, preferably of metal casting, to minimize the effects of possible
- the collector 21 is exposed to a heat source, for example the heat radiation of an exhaust scrubber, or an intake air preheating or a PTC heating element.
- the suction tubes 22 are formed of equal length, but are kept relatively short overall, to ensure a dynamic driving operation. The length of the suction tubes 22 is dependent on Auflade binen by pressure oscillations. The diameter of the suction tubes 22 is tuned to their length, that the intake manifold volume of the individual intake manifold 22 is approximately equal to the displacement of the associated combustion cylinder.
- the described fuel injection system 14 is installed in the internal combustion engine so that the flow direction 24 of the air flow through intake manifold 15 and collector 21 is vertically ascending, as shown in the drawing. In this way, a liquid wall film transport from the collector 21 is avoided in the combustion chambers of the combustion cylinder.
- Liquid fuel which is deposited on the walls of the collector 21 in cold ambient conditions, is due to this installation system by gravity in the direction of the throttle device 16 requested. Aerodynamic shear forces generated by the air drawn into the combustion chamber partially tear off boundary layers of the wall film, which are then fed to the combustion chambers as a conglomerate of small drops.
- the fuel wall film, which penetrates to the throttle device 16 as a liquid film is there demolished due to the high flow velocities through the throttle gap and fed to the intake air.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
L'invention concerne un moteur à combustion interne qui présente plusieurs cylindres de combustion, chacun doté d'au moins une admission (13), une tubulure (15) d'aspiration d'air qui se ramifie vers l'aval en différents tubes d'aspiration (22) qui débouchent chacun dans une admission (13) et une soupape (17) d'injection de carburant qui injecte du carburant dans l'écoulement d'air. Pour garantir une bonne préparation et une bonne homogénéisation du mélange de carburant et d'air d'une manière économique à fabriquer, la soupape (17) d'injection est disposée de telle sorte que sa direction d'injection de carburant est opposée à la direction d'écoulement (24) de l'air. La soupape (17) d'injection est de préférence disposée en aval d'un dispositif d'étranglement (16) prévu dans la tubulure d'aspiration (15).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005052422.2 | 2005-11-03 | ||
| DE200510052422 DE102005052422A1 (de) | 2005-11-03 | 2005-11-03 | Brennkraftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007051720A1 true WO2007051720A1 (fr) | 2007-05-10 |
Family
ID=37949785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2006/067598 WO2007051720A1 (fr) | 2005-11-03 | 2006-10-20 | Moteur a combustion interne |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102005052422A1 (fr) |
| WO (1) | WO2007051720A1 (fr) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014202971B4 (de) | 2014-02-18 | 2023-01-26 | Röchling Automotive SE & Co. KG | Saugrohr mit integriertem Ladeluftkühler mit zwei Kreisläufen |
| DE102018213237B4 (de) * | 2018-08-07 | 2024-05-02 | Bayerische Motoren Werke Aktiengesellschaft | Motorradbrennkraftmaschine mit innerer Verbrennung mit einer Motorradbrennkraftmaschinensauganlage und Verfahren zum Steuern einer solchen Motorradbrennkraftmaschinensauganlage |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB900386A (en) * | 1958-09-08 | 1962-07-04 | Lexington Prod Ltd | Improvements in or relating to fuel injection for internal combustion engines |
| WO1996041942A1 (fr) * | 1995-06-12 | 1996-12-27 | Gachnang, Hans, Rudolf | Procede et dispositif d'adjonction de gaz combustible a un melange |
| US5878726A (en) * | 1996-04-12 | 1999-03-09 | Sanshin Kogyo Kabushiki Kaisha | Engine fuel injection system |
-
2005
- 2005-11-03 DE DE200510052422 patent/DE102005052422A1/de not_active Withdrawn
-
2006
- 2006-10-20 WO PCT/EP2006/067598 patent/WO2007051720A1/fr active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB900386A (en) * | 1958-09-08 | 1962-07-04 | Lexington Prod Ltd | Improvements in or relating to fuel injection for internal combustion engines |
| WO1996041942A1 (fr) * | 1995-06-12 | 1996-12-27 | Gachnang, Hans, Rudolf | Procede et dispositif d'adjonction de gaz combustible a un melange |
| US5878726A (en) * | 1996-04-12 | 1999-03-09 | Sanshin Kogyo Kabushiki Kaisha | Engine fuel injection system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005052422A1 (de) | 2007-05-10 |
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| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| 122 | Ep: pct application non-entry in european phase |
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