DE102007018310B3 - Method and device for controlling a high-pressure accumulator pressure of an injection system of an internal combustion engine - Google Patents
Method and device for controlling a high-pressure accumulator pressure of an injection system of an internal combustion engine Download PDFInfo
- Publication number
- DE102007018310B3 DE102007018310B3 DE200710018310 DE102007018310A DE102007018310B3 DE 102007018310 B3 DE102007018310 B3 DE 102007018310B3 DE 200710018310 DE200710018310 DE 200710018310 DE 102007018310 A DE102007018310 A DE 102007018310A DE 102007018310 B3 DE102007018310 B3 DE 102007018310B3
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- DE
- Germany
- Prior art keywords
- pressure
- low
- pump
- combustion engine
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D41/38—Controlling fuel injection of the high pressure type
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
- F02D41/3845—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped
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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
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/0275—Arrangement of common rails
- F02M63/028—Returnless common rail system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/31—Control of the fuel pressure
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
Die Erfindung betrifft ein Verfahren zur Regelung eines Hochdruckspeicherdrucks eines Einspritzsystems einer Brennkraftmaschine. Mittels einer Vordruckregeleinheit wird anhand eines Kennfelds oder einer mathematischen Funktion der Druckwert in einer Niederdruckleitung geregelt. Dabei geht als Eingangsgröße in die Vordruckregeleinheit der kontinuierlich gemessene Druckwert im Hochdruckspeicher ein.The invention relates to a method for controlling a high-pressure accumulator pressure of an injection system of an internal combustion engine. By means of a form control unit is based on a map or a mathematical function of the pressure in a low pressure line regulated. In this case, the continuously measured pressure value in the high-pressure accumulator enters into the admission pressure control unit as an input variable.
Description
Kraftstoffeinspritzvorrichtungen zum Betrieb einer Brennkraftmaschine sind generell seit vielen Jahren bekannt. Bei einem sogenannten Common-Rail Einspritzsystem erfolgt die Kraftstoffzuführung in den jeweiligen Brennraum der Brennkraftmaschine durch Injektoren, insbesondere durch Piezoinjektoren. Dabei ist die Güte der Verbrennung vom Druck eines den Injektoren vorgeschalteten Hochdruckspeichers abhängig. Um eine möglichst hohe spezifische Leistung der Brennkraftmaschine und gleichzeitig eine geringe Schadstoffemissionen zu erreichen, muss der Druck dieses Hochdruckspeichers geregelt werden. Dabei können bei einer Verwendung einer Hochdruckpumpe und eines Druckspeichers für den Kraftstoff Einspritzdrücke von 300 bis 2000 bar erreicht werden.Fuel injectors To operate an internal combustion engine are generally for many years known. In a so-called common-rail injection system takes place the fuel supply in the respective combustion chamber of the internal combustion engine by injectors, in particular by piezo injectors. Here is the quality of the combustion from the pressure of a high pressure accumulator upstream of the injectors dependent. To one as possible high specific power of the internal combustion engine and at the same time To achieve low pollutant emissions, the pressure of this must be High-pressure accumulator are regulated. It can when using a High pressure pump and a pressure accumulator for the fuel injection pressures of 300 to 2000 bar can be achieved.
Die Druckregelung des Hochdruckspeichers kann dabei auf unterschiedliche Weisen realisiert werden. Diese kann je nach Ausführung des Einspritzsystems mit einem Druckregelventil im Hochdruckbereich und einem Volumenregelventil auf der Niederdruckseite der Hochdruckpumpe, oder nur durch ein Volumenregelventil auf der Niederdruckseite der Hochdruckpumpe erfolgen. Im Folgenden wird ausschließlich auf den zweiten Fall, d. h. auf die Druckregelung anhand eines Volumenregelventils, eingegangen. Die Regelung des Hochdruckspeicherdrucks erfolgt dabei durch die Regelung des Volumenstroms im Niederdruckbereich der Hochdruckpumpe. Diese Volumenstromregelung ist sowohl abhängig vom Systembedarf, welcher durch die eingespritzte Kraftstoffmenge in den Brennraum bestimmt wird, als auch von der Kraftstoffmenge, die durch Schaltleckageverluste aus den Injektoren austritt.The Pressure control of the high-pressure accumulator can be different Wise ways are realized. This may vary depending on the design of the Injection system with a pressure control valve in the high pressure area and a volume control valve on the low pressure side of the high pressure pump, or only by a volume control valve on the low pressure side of High pressure pump done. The following is exclusively on the second case, d. H. on the pressure control using a volume control valve, received. The regulation of the high-pressure accumulator pressure is carried out by the Control of the volume flow in the low-pressure region of the high-pressure pump. This volume flow control is both dependent on the system requirements, which determined by the amount of fuel injected into the combustion chamber, as well as the amount of fuel caused by switching leakage exits the injectors.
Aus
der
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Aus
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Die der vorliegenden Erfindung zu Grunde liegende Aufgabe besteht nun darin, ein Verfahren und eine Vorrichtung bereitzu stellen, damit die Regelung des Hochdruckspeicherwerts kostengünstiger und im Leerlauf stabiler betrieben werden kann.The The object underlying the present invention is now to provide a method and apparatus for doing so the control of the high-pressure accumulator value more cost-effective and idle stable can be operated.
Diese Aufgabe wird erfindungsgemäß durch ein Verfahren bzw. durch eine Vorrichtung gemäß den Merkmalen der unabhängigen Ansprüche gelöst. Vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet.This object is achieved by a method or by a device according to the features of the independent claims dissolved. Advantageous embodiments of the invention are characterized in the subclaims.
Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, dass durch eine alleinige Regelung des Druckwerts in einer Niederdruckleitung durch das Vordruckregelventil auf das Volumenstromregelventil zur Regelung des in den Hochdruckspeicher zugeführten Volumenstroms verzichtet werden kann. Die Regelung des Einspritzsystems wird daher vereinfacht und ist durch den Entfall des Volumenstromregelventils kostengünstiger. Dabei sind durch die Niederdruckleitung ein Kraftstofftank an eine Niederdruckpumpe und diese mit einer Hochdruckpumpe hydraulisch verbunden. Ferner ist eine stabile Regelung bei Leerlauf und damit kleinen Einspritzmengen möglich, da hier das Vordruckregelventil teilweise geöffnet ist und somit aufgrund des sich in der Niederdruckleitung einstellenden Druckwerts, die für den Hochdruckspeicher benötigte Kraftstoffmenge bereitgestellt wird.The particular advantages of the invention are that by a sole regulation of the pressure value in a low-pressure line through the admission pressure control valve to the flow control valve for Control of the supplied to the high pressure accumulator flow dispensed can be. The regulation of the injection system is therefore simplified and is cheaper by the elimination of the flow control valve. Here are through the low pressure line a fuel tank to a Low pressure pump and this with a high pressure pump hydraulically connected. Furthermore, a stable control at idle and thus small injection quantities possible, because here the inlet pressure control valve is partially open and therefore due of the adjusting in the low pressure line pressure value, the for the High-pressure storage required Amount of fuel is provided.
Eine weitere vorteilhafte Ausgestaltung der Erfindung besteht darin, dass die Regelung des Druckwerts in der Niederdruckleitung durch das Vordruckregelventil den Wirkungsgrad der Pumpe erhöht, da der Druck in der Niederdruckleitung betriebspunktabhängig an den erforderlichen Wert angepasst werden kann, und der Druckwert in der Niederdruckleitung nur bei einer Volllast der Brennkraftmaschine seinen Maximalwert erreicht.A further advantageous embodiment of the invention is that the regulation of the pressure value in the low pressure line by the admission pressure control valve increases the efficiency of the pump, as the Pressure in the low pressure line operating point dependent to the required Value can be adjusted, and the pressure value in the low pressure line only at a full load of the internal combustion engine its maximum value reached.
Einzelheiten der Erfindung werden anhand der Zeichnungen näher erläutert. Dabei zeigt:details The invention will be explained in more detail with reference to the drawings. Showing:
Mittels
einer Niederdruckpumpe
Weiterhin
wird über
eine Messeinrichtung der Druck
Claims (9)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710018310 DE102007018310B3 (en) | 2007-04-18 | 2007-04-18 | Method and device for controlling a high-pressure accumulator pressure of an injection system of an internal combustion engine |
PCT/EP2008/053478 WO2008128841A2 (en) | 2007-04-18 | 2008-03-25 | Method and device for regulating a pressure in a high-pressure accumulator of an injection system of an internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE200710018310 DE102007018310B3 (en) | 2007-04-18 | 2007-04-18 | Method and device for controlling a high-pressure accumulator pressure of an injection system of an internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102007018310B3 true DE102007018310B3 (en) | 2008-11-13 |
Family
ID=39829652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DE200710018310 Active DE102007018310B3 (en) | 2007-04-18 | 2007-04-18 | Method and device for controlling a high-pressure accumulator pressure of an injection system of an internal combustion engine |
Country Status (2)
Country | Link |
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DE (1) | DE102007018310B3 (en) |
WO (1) | WO2008128841A2 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19630938A1 (en) * | 1996-07-31 | 1998-02-05 | Siemens Ag | Fuel supply line fuel volume-flow control valve |
DE19713183C1 (en) * | 1997-03-27 | 1998-08-13 | Siemens Ag | Controlling fuel pressure in fuel tank connected to fuel injection system for IC engine |
DE19731201A1 (en) * | 1997-07-21 | 1999-01-28 | Siemens Ag | Method of controlling fuel pressure in fuel storage of internal combustion engine, e.g. diesel engine |
DE10001882A1 (en) * | 2000-01-19 | 2001-08-02 | Bosch Gmbh Robert | Method for operating a prefeed pump of a fuel metering system and fuel metering system of a direct-injection internal combustion engine |
DE10148222A1 (en) * | 2001-09-28 | 2003-04-17 | Bosch Gmbh Robert | Method for operating an internal combustion engine |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4164021B2 (en) * | 2003-12-12 | 2008-10-08 | 株式会社日立製作所 | Engine high-pressure fuel pump controller |
KR20060125839A (en) * | 2004-01-14 | 2006-12-06 | 로베르트 보쉬 게엠베하 | Method and control device for operating an internal combustion engine with an injection system |
DE102004019152B4 (en) * | 2004-04-21 | 2007-05-31 | Robert Bosch Gmbh | Method for operating a solenoid valve for quantity control |
EP1674718B1 (en) * | 2004-12-23 | 2007-03-14 | C.R.F. Società Consortile per Azioni | Internal combustion engine storage-volume fuel injection system |
JP4376202B2 (en) * | 2005-04-07 | 2009-12-02 | 本田技研工業株式会社 | Control device |
DE102005020686B4 (en) * | 2005-05-03 | 2007-08-02 | Siemens Ag | Method and device for controlling a fuel supply device of an internal combustion engine |
DE102005029138B3 (en) * | 2005-06-23 | 2006-12-07 | Mtu Friedrichshafen Gmbh | Control and regulating process for engine with common rail system has second actual rail pressure determined by second filter |
-
2007
- 2007-04-18 DE DE200710018310 patent/DE102007018310B3/en active Active
-
2008
- 2008-03-25 WO PCT/EP2008/053478 patent/WO2008128841A2/en active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19630938A1 (en) * | 1996-07-31 | 1998-02-05 | Siemens Ag | Fuel supply line fuel volume-flow control valve |
DE19713183C1 (en) * | 1997-03-27 | 1998-08-13 | Siemens Ag | Controlling fuel pressure in fuel tank connected to fuel injection system for IC engine |
DE19731201A1 (en) * | 1997-07-21 | 1999-01-28 | Siemens Ag | Method of controlling fuel pressure in fuel storage of internal combustion engine, e.g. diesel engine |
DE10001882A1 (en) * | 2000-01-19 | 2001-08-02 | Bosch Gmbh Robert | Method for operating a prefeed pump of a fuel metering system and fuel metering system of a direct-injection internal combustion engine |
DE10148222A1 (en) * | 2001-09-28 | 2003-04-17 | Bosch Gmbh Robert | Method for operating an internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
WO2008128841A2 (en) | 2008-10-30 |
WO2008128841A3 (en) | 2009-01-08 |
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Legal Events
Date | Code | Title | Description |
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8364 | No opposition during term of opposition | ||
R084 | Declaration of willingness to licence | ||
R081 | Change of applicant/patentee |
Owner name: VITESCO TECHNOLOGIES GMBH, DE Free format text: FORMER OWNER: CONTINENTAL AUTOMOTIVE GMBH, 30165 HANNOVER, DE |
|
R081 | Change of applicant/patentee |
Owner name: VITESCO TECHNOLOGIES GMBH, DE Free format text: FORMER OWNER: VITESCO TECHNOLOGIES GMBH, 30165 HANNOVER, DE |