DE102016202135A1 - Common rail in a fuel injection system - Google Patents
Common rail in a fuel injection system Download PDFInfo
- Publication number
- DE102016202135A1 DE102016202135A1 DE102016202135.4A DE102016202135A DE102016202135A1 DE 102016202135 A1 DE102016202135 A1 DE 102016202135A1 DE 102016202135 A DE102016202135 A DE 102016202135A DE 102016202135 A1 DE102016202135 A1 DE 102016202135A1
- Authority
- DE
- Germany
- Prior art keywords
- common rail
- fuel
- connector
- pressure
- injection system
- 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- Withdrawn
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Classifications
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- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
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- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/002—Arrangement of leakage or drain conduits in or from injectors
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- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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- 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
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/04—Means for damping vibrations or pressure fluctuations in injection pump inlets or outlets
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- 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
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
- F02M41/14—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined rotary distributor supporting pump pistons
- F02M2041/1438—Arrangements or details pertaining to the devices classified in F02M41/14 and subgroups
- F02M2041/1444—Feed-pumps; Arrangements or pressure regulation therefor
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
Es wird hier ein Common-Rail 106 im Kraftstoffeinspritzsystem offenbart. Das Common-Rail 106 umfasst einen Einlasskanal 105 in Strömungsverbindung mit einer Hochdruckpumpe, mehrere Auslasskanäle 107; wobei mindestens einer der Auslasskanäle mit einem Injektor in Strömungsverbindung steht. Ein Rücklaufleitungskanal 109 steht über einen Verbinder 111 mit einem Rücklaufleitungspfad 110 in Strömungsverbindung. Der Rücklaufleitungspfad 110 steht mit einem Kraftstofftank in Strömungsverbindung. Ein Verbinder 111 ist in das Common-Rail 106 integriert.Here, a common rail 106 in the fuel injection system is disclosed. The common rail 106 includes an inlet passage 105 in fluid communication with a high pressure pump, a plurality of outlet passages 107; wherein at least one of the outlet channels is in flow communication with an injector. A return conduit 109 is in fluid communication with a return conduit 110 via a connector 111. The return line path 110 is in fluid communication with a fuel tank. A connector 111 is integrated in the common rail 106.
Description
Gebiet der ErfindungField of the invention
Die Erfindung bezieht sich auf ein Kraftstoffeinspritzsystem der Art, bei der ein Common-Rail eingesetzt wird.The invention relates to a fuel injection system of the type in which a common rail is used.
Hintergrund der ErfindungBackground of the invention
Kraftstoffspeicher-Einspritzsysteme, die auch als Common-Rail-Systeme bezeichnet werden, sind im Prinzip bekannt. Es wird zwischen Common-Rail-Systemen mit einer mengenregulierten Hochdruckpumpe (die als CP3-Systeme bekannt sind), bei denen eine Druckreduzierung im Kraftstoffdruckspeicher (Common-Rail) lediglich über die Einspritzsteuermenge und Leckage möglich ist, und Common-Rail-Systemen, bei denen ein Druckbegrenzungsventil oder Druckregelventil auf der Hochdruckseite zum Senken des Systemdrucks verwendet wird, unterschieden. Gegenstand der vorliegenden Erfindung ist die letztere Art von System, d. h., ein System mit einem Druckbegrenzungsventil oder Druckregelventil zum Senken des Systemdrucks.Fuel storage injection systems, also referred to as common rail systems, are known in principle. It is between common rail systems with a volume-regulated high-pressure pump (known as CP3 systems), in which a pressure reduction in the fuel pressure accumulator (common rail) is possible only via the injection control amount and leakage, and common rail systems, at a pressure relief valve or pressure control valve on the high pressure side is used to lower the system pressure, distinguished. The subject of the present invention is the latter type of system, i. h., a system with a pressure relief valve or pressure control valve for lowering the system pressure.
Ein Common-Rail in einem Kraftstoffeinspritzsystem führt mindestens einem Injektor von einer Kraftstoffeinspritzpumpe erhaltenen Kraftstoff unter Hochdruck zu. Der Injektor spritzt den Kraftstoff zur Verbrennung in einen Zylinder ein. Das Einspritzen von Kraftstoff in den Zylinder erfolgt basierend auf der Leistungsanforderung gemäß der Programmierung in der ECU. Bei einer stärkeren Leistungsanforderung wird Kraftstoff unter Hochdruck in den Zylinder eingespritzt, im Gegensatz dazu wird bei einer geringeren Leistungsanforderung der überschüssige Druck durch den Kraftstoffrücklaufpfad zurück zum Kraftstofftank abgelassen. Dieser folgt zur Aufrechterhaltung der Stabilität des Common-Rail und zur Zufuhr des Kraftstoffs mit einem erforderlichen Druck in den Zylinder. Der Kraftstoffrücklaufpfad steht über einen Verbinder mit dem Common-Rail in ständiger Strömungsverbindung. Allgemein wird der Verbinder in Form einer separaten Komponente bereitgestellt; dann wird der Verbinder in das Common-Rail eingeschraubt/eingedrückt. Durch das Verbauen von Verbinder mit Kraftstoffspeicher kommt es zu Problemen, insbesondere bei der Dichtfläche zwischen dem Verbinder und dem Common-Rail, wodurch es zu einer Niederdruckleckage von Kraftstoff kommt. Zu weiteren Unzulänglichkeiten der bekannten Systeme, die zu hohen Kosten führen, zählen: Kosten des Verbauens des Verbinders am Common-Rail, des Testens des Setups & und Kosten für Leckagedetektion in einem Niederdruckkreis. Zur Reduzierung der mit der Herstellung und Montage und Tests verbundenen Kosten besteht ein Bedarf zur Modifizierung der Anordnung des Common-Rail und des Verbinders.A common rail in a fuel injection system supplies fuel under high pressure to at least one injector of a fuel injection pump. The injector injects the fuel into a cylinder for combustion. The injection of fuel into the cylinder is based on the power demand according to the programming in the ECU. At a higher power demand, fuel is injected into the cylinder under high pressure, in contrast, with less power demand, the excess pressure is released through the fuel return path back to the fuel tank. This follows to maintain the stability of the common rail and to supply the fuel with a required pressure in the cylinder. The fuel return path is in constant flow communication with the common rail via a connector. Generally, the connector is provided in the form of a separate component; then the connector is screwed / pushed into the common rail. By installing connectors with fuel storage there are problems, especially in the sealing surface between the connector and the common rail, which leads to a low-pressure leakage of fuel. Other deficiencies of the known systems, which result in high costs, include: cost of installing the connector on the common rail, testing the setup & and leakage detection costs in a low pressure circuit. To reduce the costs associated with manufacturing and assembly and testing, there is a need to modify the arrangement of the common rail and the connector.
Bei der Patentanmeldung US6675774 aus dem Stand der Technik weist ein Kraftstoffeinspritzsystem für Verbrennungsmotoren, insbesondere Dieselmotoren, einen Kraftstoffspeicher auf, der von einer Hochdruckpumpe versorgt wird und einer Reihe von Injektionen, die der Anzahl an Zylindern des Motors entsprechen, Kraftstoff zuführt, und weist ein Druckbegrenzungsventil auf, das dichtend mit dem Kraftstoffspeicher verbunden ist, wobei das Druckbegrenzungsventil ein Ventilgehäuse, einen Hochdruckbereich, einen Niederdruckbereich, einen auf den Einlass ausgerichteten Ventilsitz, einen axial verschiebbaren Ventilkörper und eine den Ventilkörper in die Richtung des Ventilsitzes drückende Ventilfeder aufweist. Das Druckbegrenzungsventil ist – zumindest teilweise – so in den Kraftstoffspeicher integriert, dass zumindest der Ventilsitz und der Ventilkörper dem Kraftstoffspeicher räumlich zugeordnet sind und die das Druckbegrenzungsventil gegen den Kraftstoffspeicher abdichtende Dichtung dem Niederdruckbereich des Druckbegrenzungsventils zugeordnet ist.In the prior art patent application US6675774, a fuel injection system for internal combustion engines, particularly diesel engines, has a fuel reservoir, which is supplied by a high pressure pump and supplies fuel to a series of injections corresponding to the number of cylinders of the engine, and has a pressure relief valve which is sealingly connected to the fuel accumulator, wherein the pressure relief valve comprises a valve housing, a high-pressure region, a low-pressure region, an inlet-oriented valve seat, an axially displaceable valve body and a valve spring urging the valve body in the direction of the valve seat. The pressure limiting valve is - at least partially - integrated into the fuel accumulator, that at least the valve seat and the valve body are spatially associated with the fuel reservoir and the pressure limiting valve against the fuel accumulator sealing seal is associated with the low pressure region of the pressure relief valve.
Kurze Beschreibung der beiliegenden ZeichnungBrief description of the accompanying drawings
Verschiedene Modi der Erfindung werden in der Beschreibung detailliert offenbart und in der beiliegenden Zeichnung dargestellt:Various modes of the invention are disclosed in detail in the description and illustrated in the accompanying drawings:
Detaillierte Beschreibung der AusführungsformenDetailed description of the embodiments
Der Hochdruckkreis umfasst das Common-Rail
Eingangs erhält das Common-Rail
Es versteht sich, dass die in der obigen Beschreibung erläuterten Ausführungsformen lediglich beispielhaft sind und den Schutzumfang der vorliegenden Erfindung bezüglich der Anzahl an Auslasskanälen am Common-Rail nicht beschränken. Viele solche Ausführungsformen und andere Modifikationen und Änderungen bei der in der Beschreibung erläuterten Ausführungsformen werden in Betracht gezogen. Der Schutzumfang der Erfindung wird lediglich durch den Schutzumfang der Ansprüche beschränkt.It is understood that the embodiments explained in the above description are merely exemplary and do not limit the scope of the present invention with respect to the number of exhaust ports on the common rail. Many such embodiments and other modifications and changes to the embodiments described in the specification are contemplated. The scope of the invention is limited only by the scope of the claims.
Claims (5)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN1407CH2015 | 2015-03-20 | ||
IN1407/CHE/2015 | 2015-03-20 |
Publications (1)
Publication Number | Publication Date |
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DE102016202135A1 true DE102016202135A1 (en) | 2016-09-22 |
Family
ID=56852814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102016202135.4A Withdrawn DE102016202135A1 (en) | 2015-03-20 | 2016-02-12 | Common rail in a fuel injection system |
Country Status (2)
Country | Link |
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DE (1) | DE102016202135A1 (en) |
FR (1) | FR3033842A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110953105B (en) * | 2018-08-29 | 2023-08-29 | 罗伯特·博世有限公司 | Reflow connector for common rail |
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2016
- 2016-02-12 DE DE102016202135.4A patent/DE102016202135A1/en not_active Withdrawn
- 2016-03-17 FR FR1652253A patent/FR3033842A1/en active Pending
Also Published As
Publication number | Publication date |
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FR3033842A1 (en) | 2016-09-23 |
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R082 | Change of representative |
Representative=s name: BURBAUM, CHRISTOPH, DIPL.-PHYS. DR.RER.NAT., DE |
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R005 | Application deemed withdrawn due to failure to request examination |