DE3905254A1 - Cooling device for fuel injection valves of an internal combustion engine - Google Patents
Cooling device for fuel injection valves of an internal combustion engineInfo
- Publication number
- DE3905254A1 DE3905254A1 DE3905254A DE3905254A DE3905254A1 DE 3905254 A1 DE3905254 A1 DE 3905254A1 DE 3905254 A DE3905254 A DE 3905254A DE 3905254 A DE3905254 A DE 3905254A DE 3905254 A1 DE3905254 A1 DE 3905254A1
- Authority
- DE
- Germany
- Prior art keywords
- cooling air
- injection valves
- fuel
- cooling
- internal combustion
- 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.)
- Withdrawn
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
- F02M53/00—Fuel-injection apparatus characterised by having heating, cooling or thermally-insulating means
- F02M53/04—Injectors with heating, cooling, or thermally-insulating means
- F02M53/08—Injectors with heating, cooling, or thermally-insulating means with air cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P1/00—Air cooling
- F01P1/06—Arrangements for cooling other engine or machine parts
- F01P1/10—Arrangements for cooling other engine or machine parts for cooling fuel injectors or sparking-plugs
-
- 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
- F02M31/00—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture
- F02M31/20—Apparatus for thermally treating combustion-air, fuel, or fuel-air mixture for cooling
-
- 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
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
- F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit
-
- 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
- F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
- F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
- F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails
-
- 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
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Die Erfindung betrifft eine Kühlvorrichtung gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a cooling device according to the preamble of patent claim 1.
Bekanntlich führt die zunehmende spezifische Belastung von Ottomotoren mit Kraftstoff einspritzung insbesondere bei Verwendung als Antriebsmaschinen für Kraftfahrzeuge in Verbindung mit dem Trend zur Verkleinerung und Kapselung der Motorräume zu Schwie rigkeiten hinsichtlich der Vermeidung von Heißstart- und Heißanfahrproblemen, deren Ursache in der Dampfblasenbildung im Kraftstoff insbesondere im Bereich des Kraft stoffverteilers und der Einspritzventile zu sehen ist. Betrachtet man weiterhin den be vorzugten Einsatzfall der Erfindung, nämlich bei Brennkraftmaschinen zum Antrieb von Kraftfahrzeugen, so hat der Trend zur Optimierung der Fahrzeugkarosserien hinsicht lich des Strömungswiderstands nicht nur die angesprochene Verkleinerung der Motorräu me, sondern auch die Vermeidung zusätzlicher Kühlluftöffnungen zur Folge.As is well known, the increasing specific load on gasoline engines with fuel leads injection especially when used as prime movers for motor vehicles in Combined with the trend to reduce and encapsulate the engine compartments to Schwie abilities to avoid hot start and hot start problems, their Cause in the formation of vapor bubbles in the fuel, especially in the area of the force distributor and the injection valves can be seen. If you continue to look at the be preferred application of the invention, namely in internal combustion engines for driving Motor vehicles, this is the trend towards optimizing vehicle bodies Lich the flow resistance not only the mentioned reduction of the engine compartment me, but also the avoidance of additional cooling air openings.
Die gattungsbildende Kühlvorrichtung nach dem DE-GM 87 10 359, FO1P 1/10, sieht ein
die Einspritzventile tragendes Gehäuse vor mit einem ersten Kanal zur Zufuhr der Ver
brennungsluft zu den Brennräumen der Brennkraftmaschine und einem zweiten Kanal zur
Zufuhr von Kühlluft zu den Einspritzventilen. Dabei ist der zweite Kanal, der einenends
mit einer Kühlluftquelle in Verbindung steht, gleichsam mit Querstutzen versehen, die
zu den einzelnen Einlaßventilen führen und dort Öffnungen ins Freie aufweisen, so daß
die Kühlluft an der Stelle der Einlaßventile ins Freie austritt. Diese bekannte Kühlvor
richtung arbeitet also zwar in vorteilhafter Weise mit Luft als Kühlmedium, stellt jedoch
infolge der beschriebenen Lage der Austrittsöffnungen für die Kühlluft keine gleichmä
ßige Kühlung aller Einspritzventile sicher und ist schließlich in ihrer Kühlwirkung auf
den in den Einspritzventilen befindlichen Kraftstoff beschränkt.
The generic cooling device according to DE-GM 87 10 359, FO1P 1/10, provides a housing supporting the injectors with a first channel for supplying the combustion air to the combustion chambers of the internal combustion engine and a second channel for supplying cooling air to the injectors. The second channel, which is connected at one end to a cooling air source, is provided, as it were, with cross connectors which lead to the individual inlet valves and have openings to the outside, so that the cooling air exits to the outside at the location of the inlet valves. This known Kühlvor device thus works in an advantageous manner with air as the cooling medium, but due to the described position of the outlet openings for the cooling air does not ensure uniform cooling of all the injection valves and is ultimately limited in its cooling effect on the fuel located in the injection valves.
Der Erfindung liegt die Aufgabe zugrunde, eine Kühlvorrichtung gemäß dem Oberbegriff des Patentanspruchs 1, also unter Wahrung der Vorteile einer Luftkühlung, zu schaffen, deren Kühlwirkung nicht auf die Einspritzventile beschränkt und außerdem hinsichtlich aller Einspritzventile vergleichmäßigt ist.The invention has for its object a cooling device according to the preamble of claim 1, i.e. while maintaining the advantages of air cooling, their cooling effect is not limited to the injectors and also in terms of of all injectors is evened out.
Die erfindungsgemäße Lösung dieser Aufgabe besteht in den kennzeichnenden Merkma len des Hauptanspruchs, vorteilhafte Ausbildungen der Erfindung beschreiben die Unter ansprüche.The solution to this problem according to the invention consists in the characteristic features len of the main claim, advantageous embodiments of the invention describe the sub Expectations.
Infolge der Tatsache, daß der Kühlluftkanal einen Kühlluftaustritt nur an seinem dem Kühllufteintritt gegenüberliegenden Ende, nicht aber im Bereich der einzelnen Einspritz ventile, aufweist, ist sichergestellt, daß alle Einspritzventile von derselben Kühlluftströ mung beaufschlagt sind. Diese Kühlluftströmung erfaßt infolge der erfindungsgemäßen Anordnung auch des die Einspritzventile mit Kraftstoff speisenden Kraftstoffverteilers innerhalb des Kühlluftkanals auch den Kraftstoffverteiler, so daß nicht nur der in den Einspritzventilen befindliche Kraftstoff gekühlt wird, sondern auch derjenige innerhalb des Kraftstoffverteilers.Due to the fact that the cooling air duct has a cooling air outlet only at its Cooling air inlet opposite end, but not in the area of the individual injection valves, ensures that all injectors from the same cooling air flows are acted upon. This cooling air flow is detected as a result of the invention Arrangement of the fuel distributor that feeds the injection valves with fuel inside the cooling air duct also the fuel distributor, so that not only the in the Injectors located fuel is cooled, but also the one inside of the fuel rail.
Ein Ausführungsbeispiel der Erfindung wird im folgenden anhand der Zeichnung erläu tert, deren Fig. 1 einen Längsschnitt und deren Fig. 2 den in Fig. 1 bei II-II ange deuteten Querschnitt wiedergibt.An embodiment of the invention is hereinafter tert tert with reference to the drawing, Fig. 1 shows a longitudinal section and Fig. 2 shows the cross-section indicated in Fig. 1 at II-II.
Das aus den beiden Gehäuseteilen 1 und 2 (siehe Fig. 2) längs der Trennebene 3 dicht zusammengesetzte Gehäuse 4 bildet sowohl den Kühlluftkanal 5 für die in diesem Aus führungsbeispiel einzelnen Saugrohren - die Saugrohranordnung ist mit 6 bezeichnet - zugeordneten Einspritzventile 7 bekannter und daher nicht zu beschreibender Bauart als auch den diese Ventile mit Kraftstoff versorgenden Kraftstoffverteiler 8. Dieser ist an seinem einen Ende mit dem Kraftstoffvorlauf 9 und an seinem anderen Ende mit dem Kraftstoffrücklauf 10 versehen, die Flußrichtung des Kraftstoffs ist an diesen Stellen durch Pfeile angedeutet. Der Verteiler 8 trägt am Ort jedes der Einspritzventile 7 einen Zulaufstutzen 11, der das Zulaufende des jeweiligen Ventils 7 dichtend aufnimmt und das Ventil über eine Klammer 12 in an sich bekannter Weise arretiert. Die Ventile er strecken sich zwischen diesen individuellen Zulaufstutzen 11 einerseits und Ventilauf nahmen 13 an der Saugrohrseite andererseits, wo ebenfalls durch O-Ringe für eine gute Abdichtung gesorgt ist. Diese Montage bzw. Halterung der Einspritzventile 7 wird durch die beschriebene zweiteilige Ausführung des Gehäuses 4 (Trennebene 3) möglich. The from the two housing parts 1 and 2 (see FIG. 2) along the parting plane 3 tightly assembled housing 4 forms both the cooling air channel 5 for the individual intake manifolds in this exemplary embodiment - the intake manifold arrangement is designated 6 - associated injection valves 7 are known and therefore not type to be described as well as the fuel distributor 8 supplying these valves with fuel. This is provided at one end with the fuel feed 9 and at the other end with the fuel return 10 , the direction of flow of the fuel is indicated by arrows at these points. At the location of each of the injection valves 7 , the distributor 8 carries an inlet connection 11 , which sealingly receives the inlet end of the respective valve 7 and locks the valve in a manner known per se via a bracket 12 . The valves he stretch between these individual inlet pipe 11 on the one hand and Ventilauf took 13 on the intake manifold side on the other hand, where a good seal is also ensured by O-rings. This assembly or mounting of the injection valves 7 is made possible by the described two-part design of the housing 4 (parting plane 3 ).
In dem gezeichneten Ausführungsbeispiel ist dem Kühlkanal 5 an dem in Fig. 1 rechten Ende des Gehäuses 4 das Luftfördergebläse 14 zugeordnet, während eine Luftaustritts öffnung bei 15, das heißt an dem anderen, in der Figur linken Ende des Gehäuses 4 vor gesehen ist. Demgemäß ergibt sich in dem Kühlkanal 5 eine Kühlluftströmung entspre chend dem Pfeil 16, das heißt entgegen der Kraftstoffströmung im Kraftstoffverteiler 8. Außerdem werden alle Einspritzventile 7 derselben Kühlluftströmung ausgesetzt, so daß durch die erfindungsgemäße Vorrichtung eine weitgehend gleichmäßige Kühlung aller Ein spritzventile 7 erfolgt.In the illustrated embodiment, the cooling duct 5 is assigned to the air-conveying fan 14 at the right end of the housing 4 in FIG. 1, while an air outlet opening at 15 , that is to say at the other, left end of the housing 4 is seen in the figure. Accordingly, there is a cooling air flow in the cooling channel 5 accordingly arrow 16 , that is, against the fuel flow in the fuel rail 8th In addition, all the injection valves 7 are exposed to the same cooling air flow, so that a largely uniform cooling of all the injection valves 7 takes place through the device according to the invention.
In dem figürlich dargestellten Ausführungsbeispiel ist der Fall einer Saugrohreinsprit zung (indirekte Einspritzung) angenommen. Grundsätzlich ist die Erfindung, wie Anspruch 6 zum Ausdruck bringt, auch bei direkter Kraftstoffeinspritzung in die Brennräume an wendbar, wobei man dann das Gehäuse 4 zur Befestigung an dem in Fig. 2 bei 17 an gedeuteten Zylinderkopf einrichten wird.In the exemplary embodiment shown in the figure, the case of an intake manifold injection (indirect injection) is assumed. Basically, the invention, as expressed in claim 6, can also be used in the case of direct fuel injection into the combustion chambers, in which case the housing 4 will be set up for attachment to the cylinder head indicated at 17 in FIG. 2.
Mit der Erfindung ist also eine mit Kühlluft arbeitende Kühlvorrichtung für Kraftstoff einspritzsysteme von Brennkraftmaschinen, insbesondere Antriebsmaschinen von Kraft fahrzeugen, geschaffen, die bei geringem Aufwand eine optimale Kühlwirkung entfaltet. In diesem Zusammenhang sei darauf hingewiesen, daß, abhängig vom jeweiligen Einsatz fall, das in Fig. 1 mit 14 bezeichnete Gebläse auch entfallen kann, wenn sich eine hin reichende Kühlluftströmung beispielsweise durch Konvektion einstellt. Auch ist es mög lich, unter Verzicht auf die Klammern 12 die Einspritzventile über elastische Dichtungen federnd zwischen den Zulaufstutzen 11 und den Aufnahmen 13 einzuspannen.With the invention, a cooling device working with cooling air for fuel injection systems of internal combustion engines, in particular prime movers of motor vehicles, is thus created, which develops an optimal cooling effect with little effort. In this context, it should be pointed out that, depending on the particular application, the blower designated by 14 in FIG. 1 can also be omitted if a cooling air flow reaching out occurs, for example, by convection. It is also pos sible to clamp the injectors resiliently via elastic seals between the inlet nozzle 11 and the receptacles 13 without the brackets 12 .
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3905254A DE3905254A1 (en) | 1988-03-02 | 1989-02-21 | Cooling device for fuel injection valves of an internal combustion engine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3806728 | 1988-03-02 | ||
DE3905254A DE3905254A1 (en) | 1988-03-02 | 1989-02-21 | Cooling device for fuel injection valves of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3905254A1 true DE3905254A1 (en) | 1989-09-14 |
Family
ID=25865425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3905254A Withdrawn DE3905254A1 (en) | 1988-03-02 | 1989-02-21 | Cooling device for fuel injection valves of an internal combustion engine |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3905254A1 (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0385820A1 (en) * | 1989-02-27 | 1990-09-05 | Automobiles Peugeot | Arrangement for sustaining and positioning several fuel injectors in an internal-combustion engine |
DE3907972A1 (en) * | 1989-03-11 | 1990-09-13 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINES |
DE19611288A1 (en) * | 1996-03-22 | 1997-09-25 | Dolmar Gmbh | Fuel cooling in injection systems of internal combustion engines that have a small amount of fuel |
DE19629307A1 (en) * | 1996-07-20 | 1998-01-22 | Daimler Benz Ag | Soundproofing cover for an internal combustion engine with cooling air blower |
US5803051A (en) * | 1996-08-24 | 1998-09-08 | Volkswagen Ag | Fuel distribution arrangement for an internal combustion engine |
DE19809175A1 (en) * | 1998-03-04 | 1999-09-09 | Schaeffler Waelzlager Ohg | IC engine with solenoid valve unit |
EP1045131A3 (en) * | 1999-04-13 | 2001-03-07 | Mannesmann VDO Aktiengesellschaft | Arrangement for supplying fuel to a vehicle engine |
DE19948205A1 (en) * | 1999-10-07 | 2001-04-12 | Heinz Leiber | Electromagnetic facility for controlling valves includes a space closed with a cover over a cylinder head circulated with cooling intake air and fitted with actuators on carriers having electronics for inlet/outlet valves |
DE10055675A1 (en) * | 2000-11-10 | 2002-05-16 | Volkswagen Ag | Fuel distributor to cylinder heads includes wholly or partly flexible mixer pipe or pipe of alternating rigid and flexible sectors using elastomer material. |
DE10136157A1 (en) * | 2001-05-04 | 2002-08-29 | Mtu Friedrichshafen Gmbh | Fuel injector for IC engines of motor vehicles has fuel reservoir of one-piece precision-cast component of hardened steel, fastened to rear of injector housing |
CN111852706A (en) * | 2019-04-25 | 2020-10-30 | 罗伯特·博世有限公司 | Cooling channel for fuel injector |
-
1989
- 1989-02-21 DE DE3905254A patent/DE3905254A1/en not_active Withdrawn
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0385820A1 (en) * | 1989-02-27 | 1990-09-05 | Automobiles Peugeot | Arrangement for sustaining and positioning several fuel injectors in an internal-combustion engine |
DE3907972A1 (en) * | 1989-03-11 | 1990-09-13 | Bosch Gmbh Robert | FUEL INJECTION SYSTEM FOR INTERNAL COMBUSTION ENGINES |
DE19611288A1 (en) * | 1996-03-22 | 1997-09-25 | Dolmar Gmbh | Fuel cooling in injection systems of internal combustion engines that have a small amount of fuel |
DE19629307A1 (en) * | 1996-07-20 | 1998-01-22 | Daimler Benz Ag | Soundproofing cover for an internal combustion engine with cooling air blower |
US5803051A (en) * | 1996-08-24 | 1998-09-08 | Volkswagen Ag | Fuel distribution arrangement for an internal combustion engine |
DE19809175A1 (en) * | 1998-03-04 | 1999-09-09 | Schaeffler Waelzlager Ohg | IC engine with solenoid valve unit |
EP1045131A3 (en) * | 1999-04-13 | 2001-03-07 | Mannesmann VDO Aktiengesellschaft | Arrangement for supplying fuel to a vehicle engine |
DE19948205A1 (en) * | 1999-10-07 | 2001-04-12 | Heinz Leiber | Electromagnetic facility for controlling valves includes a space closed with a cover over a cylinder head circulated with cooling intake air and fitted with actuators on carriers having electronics for inlet/outlet valves |
DE10055675A1 (en) * | 2000-11-10 | 2002-05-16 | Volkswagen Ag | Fuel distributor to cylinder heads includes wholly or partly flexible mixer pipe or pipe of alternating rigid and flexible sectors using elastomer material. |
DE10136157A1 (en) * | 2001-05-04 | 2002-08-29 | Mtu Friedrichshafen Gmbh | Fuel injector for IC engines of motor vehicles has fuel reservoir of one-piece precision-cast component of hardened steel, fastened to rear of injector housing |
CN111852706A (en) * | 2019-04-25 | 2020-10-30 | 罗伯特·博世有限公司 | Cooling channel for fuel injector |
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Legal Events
Date | Code | Title | Description |
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8120 | Willingness to grant licences paragraph 23 | ||
8139 | Disposal/non-payment of the annual fee |