WO2008095815A1 - Verfahren zur bestimmung einer regelgrösse für eine druckregelung eines hochdruckspeichers in einem einspritzsystem - Google Patents
Verfahren zur bestimmung einer regelgrösse für eine druckregelung eines hochdruckspeichers in einem einspritzsystem Download PDFInfo
- Publication number
- WO2008095815A1 WO2008095815A1 PCT/EP2008/050976 EP2008050976W WO2008095815A1 WO 2008095815 A1 WO2008095815 A1 WO 2008095815A1 EP 2008050976 W EP2008050976 W EP 2008050976W WO 2008095815 A1 WO2008095815 A1 WO 2008095815A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pressure
- pressure accumulator
- fuel
- accumulator
- injection system
- Prior art date
Links
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
-
- 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
- F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
-
- 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
- F02D41/3863—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves
- F02D41/3872—Controlling the fuel pressure by controlling the flow out of the common rail, e.g. using pressure relief valves characterised by leakage flow in injectors
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
Definitions
- the invention relates to a method for determining a control variable for a pressure control of a high-pressure accumulator in an injection system according to the features of the preamble of patent claim 1 or 2.
- Fuel injectors for operating an internal combustion engine have generally been known for many years.
- the fuel is supplied into the respective combustion chamber of the internal combustion engine by injectors, in particular by piezoinjectors.
- the good of combustion depends on the high-pressure accumulator pressure.
- the pressure of a high-pressure accumulator must be regulated. In this case, when using a high-pressure pump and a pressure accumulator for the fuel injection pressures of 1600 to 1800 bar can be achieved.
- the pressure control of the high-pressure accumulator can be realized in different ways. This can be done depending on the execution of the injection system with a pressure control valve in the high pressure region 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 the high pressure pump. In the following, only the second case, ie the pressure control using a volume control valve, will be discussed.
- the regulation of the high-pressure accumulator pressure is carried out by controlling the volume flow in Niederbuchbe- rich of the high pressure pump. This volume flow control is dependent both on the system requirement, which is determined by the injected fuel quantity in the combustion chamber, as well as the amount of fuel that comes out of the injectors by switching leakage losses.
- the pressure of the high-pressure accumulator is determined by the amount of fuel supplied by the pump and the amount of fuel exiting via an injection into the combustion chamber and / or via switching leakage.
- the magnitude of an actual pressure gradient value of the high-pressure accumulator is therefore dependent on the fuel quantity difference between the amount of fuel required by the pump in the Hochbuchspei- rather, and the amount of fuel injected and / or leaked via Heidelbergleckagebuche from the injector.
- a target pressure gradient value is greater than the actual pressure gradient value possible for this operating point of the internal combustion engine, then a pressure deviation occurs in the high-pressure accumulator which can not be counteracted by the pressure control.
- a maximum pressure drop and thus a maximum Istdruckgradientenwert results, for example, when the pump no longer requires fuel in the high-pressure accumulator, but at the same time exits the maximum amount of fuel from the injector via switching leaks and / or injection into the combustion chamber.
- the required nominal pressure gradient value is greater than the maximum possible actual pressure gradient value, for example, there is an erroneous increase in the integral part of a PID controller, and the control behavior therefore becomes incalculable.
- the object underlying the present invention is now to improve the good of the pressure control in the high-pressure accumulator.
- the advantages achieved with the invention are in particular that the height of the desired pressure gradient value is now dependent on the actual pressure gradient value. This prevents a higher target pressure gradient value than the actual pressure gradient value and thus improves the good of the control.
- FIG. 1 shows a block diagram of an injection system for controlling the amount of fuel to be injected
- FIG. 2 shows a pressure curve in the high-pressure accumulator in which the setpoint pressure profile is independent of the actual pressure profile
- FIG. 3 shows a pressure profile in the high-pressure accumulator in which the setpoint pressure curve is dependent on the actual pressure profile.
- FIG. 1 shows a block diagram of an injection system for controlling the fuel injection quantity.
- the injection system consists of a fuel tank 1, a low-pressure pump 2, the fuel from the tank calls, a flow control valve 3 with return line 5 to the fuel tank 1, a high-pressure pump 4, the fuel to a high-pressure accumulator 6 and supplies from injectors 7, 7 'and I 1 'For injecting the fuel into a combustion chamber of the internal combustion engine, which is not shown in the drawing.
- a low pressure pump 2 fuel from the fuel tank 1 is required and then fed to a high pressure pump 4.
- the high-pressure pump 4 then feeds a high-pressure accumulator 6 with the fuel supplied from the low-pressure pump 2.
- a volume flow control valve 3 is arranged with a return line 5 to the fuel tank between the low pressure pump 2 and the high pressure pump 4. With the help of the volume flow control valve 3, the suction volume of the high pressure pump 2 is controlled and thus determines the pressure in the high-pressure accumulator 6.
- FIG. 2 shows a pressure curve in the high-pressure accumulator, in which the setpoint pressure profile is independent of the actual pressure profile.
- the temporal pressure curve p in the high-pressure accumulator for a setpoint pressure S and an actual pressure I is plotted.
- the pressure in the high-pressure accumulator in accordance with the desired pressure curve S, should decrease linearly from the pressure value p.sub.h to a pressure value p.sub.s, for example.
- the desired pressure gradient value is constant within the time period t.sub. ⁇ and t.sub.1 and independent of the actual pressure gradient value.
- the actual pressure course I also drops, starting at the time t.sub.th, like the desired pressure S, almost linearly and reaches the pressure value p_s at the time t.sub.2.
- the control behavior is incalculable within the injection system. This can be seen, in particular, from the fact that the pressure of the high-pressure accumulator falls below the setpoint pressure ps from the time t2 and fluctuates several times by the setpoint pressure ps until the time t3. Only from the time t3 no fluctuations of the actual pressure I more and only then the desired setpoint pressure p_s is set.
- FIG. 3 shows a pressure curve in the high-pressure accumulator, in which the actual pressure gradient value is dependent on the target pressure gradient value.
- the temporal pressure curve p in the high-pressure accumulator for a desired pressure S and an actual pressure I is plotted.
- the desired pressure profile drops from pressure p_h to time t.sub.l to pressure p_s.
- the drop in the target pressure in this case is not linear and depends on the actual pressure gradient value.
- the nominal pressure gradient value is taken from a stored characteristic field in a first embodiment.
- the desired pressure gradient value is determined from the characteristic field.
- a factor is formed by dividing an elastic modulus value of the high-pressure accumulator and a total hydraulic volume of the high-pressure region.
- the modulus of elasticity modulus is stored, for example, in a characteristic field and is dependent on the temperature and the actual pressure in the high-pressure accumulator.
- the actual pressure profile I shows that the pressure p_h also falls from the time t ⁇ and reaches the pressure setpoint p s at the time t2. Since the target pressure gradient value is now from
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2008800040035A CN101600872B (zh) | 2007-02-05 | 2008-01-28 | 用于确定喷射系统中的高压蓄积器的压力调节的调节量的方法 |
US12/524,763 US8196564B2 (en) | 2007-02-05 | 2008-01-28 | Method for determining a controlled variable for pressure control of a high-pressure accumulator in an injection system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007005685A DE102007005685B4 (de) | 2007-02-05 | 2007-02-05 | Verfahren zur Bestimmung einer Regelgröße für eine Druckregelung eines Hochdruckspeichers in einem Einspritzsystem |
DE102007005685.2 | 2007-02-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008095815A1 true WO2008095815A1 (de) | 2008-08-14 |
Family
ID=39387291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/050976 WO2008095815A1 (de) | 2007-02-05 | 2008-01-28 | Verfahren zur bestimmung einer regelgrösse für eine druckregelung eines hochdruckspeichers in einem einspritzsystem |
Country Status (4)
Country | Link |
---|---|
US (1) | US8196564B2 (de) |
CN (1) | CN101600872B (de) |
DE (1) | DE102007005685B4 (de) |
WO (1) | WO2008095815A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007005685B4 (de) * | 2007-02-05 | 2009-04-23 | Continental Automotive Gmbh | Verfahren zur Bestimmung einer Regelgröße für eine Druckregelung eines Hochdruckspeichers in einem Einspritzsystem |
DE102007053403B4 (de) * | 2007-11-09 | 2016-06-09 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Bestimmen einer schwingungsoptimierten Einstellung einer Einspritzvorrichtung |
FI121319B (fi) * | 2008-12-31 | 2010-09-30 | Waertsilae Finland Oy | Menetelmä ja laitteisto polttomoottorin CR-järjestelmän paineen säätämiseksi |
US20140163845A1 (en) * | 2012-12-12 | 2014-06-12 | GM Global Technology Operations LLC | Hydraulic accumulator fill estimation for controlling automatic engine stop/start |
US9234486B2 (en) * | 2013-08-15 | 2016-01-12 | General Electric Company | Method and systems for a leakage passageway of a fuel injector |
FR3028890B1 (fr) * | 2014-11-21 | 2019-08-23 | Continental Automotive France | Procede de demarrage d'un moteur a combustion interne a injection directe par adaptation de la quantite de carburant injectee |
JP6156397B2 (ja) * | 2015-01-14 | 2017-07-05 | トヨタ自動車株式会社 | 内燃機関 |
DE102015207961B4 (de) * | 2015-04-29 | 2017-05-11 | Mtu Friedrichshafen Gmbh | Verfahren zum Erkennen einer Dauereinspritzung im Betrieb einer Brennkraftmaschine, Einspritzsystem für eine Brennkraftmaschine und Brennkraftmaschine |
DE102017217113A1 (de) * | 2017-09-26 | 2019-03-28 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Verbrennungsmotors und elektronisches Steuergerät für einen Verbrennungsmotor |
EP4037887A4 (de) | 2019-10-04 | 2024-01-17 | Husky Injection Molding Systems Luxembourg IP Development S.à.r.l | Stabilisierter adaptiver hydraulischer systemdruck in einem spritzgiesssystem |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0860601A2 (de) * | 1997-02-21 | 1998-08-26 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzsystem für eine Brennkraftmaschine |
JPH11148412A (ja) * | 1997-11-19 | 1999-06-02 | Nissan Motor Co Ltd | ディーゼルエンジンの制御装置 |
DE102007000212A1 (de) * | 2006-04-06 | 2007-10-18 | Denso Corp., Kariya | Kraftstoffeinspritz-Steuergerät |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19731201C2 (de) * | 1997-07-21 | 2002-04-11 | Siemens Ag | Verfahren zum Regeln des Kraftstoffdruckes in einem Kraftstoffspeicher |
AUPQ233899A0 (en) * | 1999-08-19 | 1999-09-09 | Orbital Engine Company (Australia) Proprietary Limited | Pressure regulation method for a fuel injection system |
DE10160311C2 (de) * | 2001-12-07 | 2003-11-20 | Bosch Gmbh Robert | Verfahren, Computerprogramm, Steuer- und Regelgerät zum Betreiben einer Brennkraftmaschine sowie Brennkraftmaschine |
DE60210773T2 (de) * | 2002-09-20 | 2007-04-12 | Ford Global Technologies, LLC (n.d.Ges.d. Staates Delaware), Dearborn | Verfahren und Gerät für Überwachung von Steuerventilen |
JP4042058B2 (ja) * | 2003-11-17 | 2008-02-06 | 株式会社デンソー | 内燃機関用燃料噴射装置 |
DE102004028515B3 (de) * | 2004-06-11 | 2005-11-24 | Siemens Ag | Verfahren und Vorrichtung zum Überwachen einer Kraftstoffzuführeinrichtung einer Brennkraftmaschine |
JP4407611B2 (ja) * | 2005-10-06 | 2010-02-03 | 株式会社デンソー | 燃料噴射制御装置 |
DE102007005685B4 (de) * | 2007-02-05 | 2009-04-23 | Continental Automotive Gmbh | Verfahren zur Bestimmung einer Regelgröße für eine Druckregelung eines Hochdruckspeichers in einem Einspritzsystem |
-
2007
- 2007-02-05 DE DE102007005685A patent/DE102007005685B4/de active Active
-
2008
- 2008-01-28 WO PCT/EP2008/050976 patent/WO2008095815A1/de active Application Filing
- 2008-01-28 CN CN2008800040035A patent/CN101600872B/zh active Active
- 2008-01-28 US US12/524,763 patent/US8196564B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0860601A2 (de) * | 1997-02-21 | 1998-08-26 | Toyota Jidosha Kabushiki Kaisha | Kraftstoffeinspritzsystem für eine Brennkraftmaschine |
JPH11148412A (ja) * | 1997-11-19 | 1999-06-02 | Nissan Motor Co Ltd | ディーゼルエンジンの制御装置 |
DE102007000212A1 (de) * | 2006-04-06 | 2007-10-18 | Denso Corp., Kariya | Kraftstoffeinspritz-Steuergerät |
Also Published As
Publication number | Publication date |
---|---|
US20100132668A1 (en) | 2010-06-03 |
DE102007005685B4 (de) | 2009-04-23 |
CN101600872A (zh) | 2009-12-09 |
US8196564B2 (en) | 2012-06-12 |
CN101600872B (zh) | 2012-12-12 |
DE102007005685A1 (de) | 2008-08-07 |
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