WO2008090135A1 - Verfahren zur ermittlung eines unkontrollierten beschleunigens einer brennkraftmaschine. - Google Patents
Verfahren zur ermittlung eines unkontrollierten beschleunigens einer brennkraftmaschine. Download PDFInfo
- Publication number
- WO2008090135A1 WO2008090135A1 PCT/EP2008/050672 EP2008050672W WO2008090135A1 WO 2008090135 A1 WO2008090135 A1 WO 2008090135A1 EP 2008050672 W EP2008050672 W EP 2008050672W WO 2008090135 A1 WO2008090135 A1 WO 2008090135A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- internal combustion
- combustion engine
- control
- controlled system
- dependent
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
-
- 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
- F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed signals
-
- 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
- F02D41/3854—Controlling the fuel pressure by controlling the flow into the common rail, e.g. the amount of fuel pumped with elements in the low pressure part, e.g. low pressure pump
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
- F02D31/007—Electric control of rotation speed controlling fuel supply
- F02D31/009—Electric control of rotation speed controlling fuel supply for maximum speed control
Definitions
- the invention relates to a method for determining an uncontrolled acceleration of an internal combustion engine according to the features of the preamble of the main claim. 1
- 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 piezo injectors.
- the generated engine torque is dependent, inter alia, on the amount of fuel injected per stroke.
- the fuel quantity is not measured on its own but calculated over the duration of injection and the applied fuel pressure. Should there be a fault in the system which increases the injection quantity, e.g. a jamming injector and / or a wrong-measuring rail pressure sensor, the increase of the injection quantity is not recognized by the system.
- the generated torque does not coincide with the driver's request and the vehicle can accelerate unintentionally by the driver. In the worst case, it may come to a "run away", an uncontrolled acceleration of the internal combustion engine, which can lead to the destruction of the same.
- the object underlying the present invention is now to provide a method which determines an unintentional increase in the amount of fuel and thus an unintentional acceleration of the internal combustion engine. This object is achieved by the features of claim 1.
- Advantageous embodiments of the invention are characterized in the subclaims.
- the advantages achieved by the invention are, in particular, that an unintentional acceleration of the internal combustion engine is identified by considering an output variable of a control unit.
- further measures to avoid the uncontrolled acceleration of the internal combustion engine by e.g. a Steuergerat be initiated.
- the method makes it possible, depending on the operating state of the internal combustion engine, to check the plausibility of the amount of fuel present in the injection system. It is therefore possible to check at any time whether e.g. Leakage has occurred within the injection system, since here, compared to an injection system without leakage, higher fuel quantity flows through the injection system.
- FIG. 1 shows a block diagram of an injection system for controlling the fuel to be injected
- FIG. 2 shows a block diagram of a control circuit for determining an uncontrolled acceleration of an internal combustion engine.
- FIG. 3 shows a flowchart of the method sequence in the diagnostic unit DIAG2 for determining whether an uncontrolled acceleration of the internal combustion engine is present.
- 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, which requires fuel from the tank, 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 supplies, and injectors 7, 7 'and 1''for injecting the fuel into a combustion chamber 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. It can build up in the high-pressure accumulator 6 pressures up to 1800 bar. About injectors 7, 7 ', and I 1 ', the fuel from the high-pressure accumulator 6 can be injected into a combustion chamber.
- 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 flow control valve, the suction volume of the high pressure pump 2 is controlled.
- FIG. 2 shows a block diagram of a control circuit RK for determining an uncontrolled acceleration of an internal combustion engine.
- the control loop RK consists of a control unit 2, a control unit 5 and an interconnected Verknupfungstechnik 4 for feeding a pre-control generated in a pilot unit 3, which together with the output signal Rl of the control unit 2, the input signal R2 of the controlled system unit 5 forms.
- the output signal P_act of the controlled system unit 5 is fed back to the input 1 and corresponds to the current pressure in the high-pressure accumulator.
- there are two diagnostic units DIAG1 and DIAG2 within the control loop RK check selected values of the control loop RK for plausibility.
- the DIAG2 still has the additional task of determining whether an uncontrolled acceleration of the internal combustion engine is present.
- a difference signal dp is formed by subtracting the output signal P ist of the controlled system unit 5 from the predefinable pressure setpoint P soll, which serves as input variable for the control unit 2.
- the difference signal dp is checked in advance by a first diagnostic unit DIAG1 to determine whether this value is plausible for the respective operating state of the internal combustion engine.
- An implausible value is thereby determined by the value to be checked exceeding a second limit range.
- This second boundary region is related to a first boundary region based on an assignment of the valve open position of the controlled system to each operating point.
- the output signal Rl of the control unit 2 is also checked for plausibility by a second diagnostic unit DIAG2.
- the method for checking the output signal Rl is carried out analogously to the method of the first diagnostic unit DIAG1.
- an additional check is made as to whether the output signal R1 is outside the normal operating range of the control unit 2. This method will be discussed again in more detail in connection with the description of the figures for FIG.
- the output signal Rl of the control unit 2 is added to a precontrol value of the pilot control unit 3.
- the precontrol value can be constant over time or variable. It has proved to be particularly advantageous that the precontrol value is dependent on the operating state of the internal combustion engine.
- the controlled system unit 5 is an example of a volume flow-based control valve.
- the input signal R2 of the controlled system unit 5 can be assigned a valve opening position of the control valve. Based on the valve opening position of the control valve of the controlled system unit 5, the pressure in the high-pressure accumulator, which is not shown in the drawing, can be regulated.
- FIG. 3 shows a flowchart of the method sequence in the diagnostic unit DIAG2 for determining whether an uncontrolled acceleration of the internal combustion engine is present.
- step Sl the output of the control unit 2 is detected by the second diagnostic unit DIAG2.
- a plausibility check of the output value of the control unit takes place in step S10. For this purpose, it is checked whether the output value is within a predefinable second limit range.
- step S20 further measures are initiated by the system in step S20. If the output value of the control unit is within the predetermined second limit range, it is further checked whether the output variable is within a predefinable first limit range. The first border area is completely within the second border area.
- This first limit range is based on an assignment of the valve open position of the controlled system to each operating point. It therefore corresponds to the working range of the control valve. If, for example due to leakage, the injected fuel quantity increases, the volume flow through the control valve must increase in order to keep the pressure in the high-pressure accumulator constant. This can be done by enlargement the Ventilo réellesqueritess be achieved. This increased volume flow through the control valve in turn causes an increase in the output value of Regelemheit. If the output value of the control unit is outside the first limit value, uncontrolled acceleration is identified in step S40, and further measures can be initiated.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/523,885 US8108124B2 (en) | 2007-01-22 | 2008-01-22 | Method for determining an uncontrolled acceleration of an internal combustion engine |
CN200880002716.8A CN101583787B (zh) | 2007-01-22 | 2008-01-22 | 用于检测内燃机的未受控制的加速的方法 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102007003150A DE102007003150B4 (de) | 2007-01-22 | 2007-01-22 | Verfahren zur Ermittlung einer unkontrollierten Drehzahlerhöhung einer Brennkraftmaschine |
DE102007003150.7 | 2007-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008090135A1 true WO2008090135A1 (de) | 2008-07-31 |
Family
ID=39345625
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/050672 WO2008090135A1 (de) | 2007-01-22 | 2008-01-22 | Verfahren zur ermittlung eines unkontrollierten beschleunigens einer brennkraftmaschine. |
Country Status (4)
Country | Link |
---|---|
US (1) | US8108124B2 (de) |
CN (1) | CN101583787B (de) |
DE (1) | DE102007003150B4 (de) |
WO (1) | WO2008090135A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5042357B2 (ja) * | 2008-04-10 | 2012-10-03 | ボッシュ株式会社 | 噴射異常検出方法及びコモンレール式燃料噴射制御装置 |
DE102010064374B3 (de) * | 2010-12-30 | 2012-07-12 | Continental Automotive Gmbh | Kraftstoffeinspritzsystem einer Brennkraftmaschine sowie dazugehöriges Druckregelverfahren, Steuergerät und Kraftfahrzeug |
US8857412B2 (en) * | 2011-07-06 | 2014-10-14 | General Electric Company | Methods and systems for common rail fuel system dynamic health assessment |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3804012A1 (de) * | 1988-02-10 | 1989-08-24 | Daimler Benz Ag | Verfahren zum verhindern des ueberdrehens einer brennkraftmaschine |
DE10032263A1 (de) * | 1999-07-06 | 2001-02-15 | Scania Cv Ab | Dieselmotor und Verfahren für dessen Regelung |
DE10162989C1 (de) * | 2001-12-20 | 2003-10-09 | Siemens Ag | Schaltungsanordnung zum Regeln einer regelbaren Kraftstoffpumpe, Verfahren zum Regeln einer Förderleistung und Verfahren zum Überprüfen der Funktionsfähigkeit einer regelbaren Kraftstoffpumpe |
DE102004061474A1 (de) * | 2004-12-21 | 2006-06-29 | Mtu Friedrichshafen Gmbh | Verfahren und Einrichtung zur Regelung des Raildrucks |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
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US4138979A (en) * | 1977-09-29 | 1979-02-13 | The Bendix Corporation | Fuel demand engine control system |
US4379332A (en) * | 1978-09-25 | 1983-04-05 | The Bendix Corporation | Electronic fuel injection control system for an internal combustion engine |
US5492098A (en) * | 1993-03-01 | 1996-02-20 | Caterpillar Inc. | Flexible injection rate shaping device for a hydraulically-actuated fuel injection system |
DE10141821C1 (de) * | 2001-08-27 | 2003-04-24 | Bosch Gmbh Robert | Verfahren, Computerprogramm und Steuer- und/oder Regelgerät zum Betreiben einer Brennkraftmaschine |
US7130736B2 (en) * | 2004-02-10 | 2006-10-31 | International Engine Intellectual Property Company, Llc | Engine speed stabilization using fuel rate control |
DE102005014161B4 (de) * | 2005-03-29 | 2007-10-31 | Siemens Ag | Verfahren und Vorrichtung zur Ermittlung der Kraftstoffdruckwerte eines Kraftstoffhochdrucksystems |
JP2006307800A (ja) * | 2005-05-02 | 2006-11-09 | Nissan Motor Co Ltd | エンジンの燃料供給装置 |
DE102005021952A1 (de) * | 2005-05-12 | 2006-11-23 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung einer Antriebseinheit eines Fahrzeugs |
JP4453623B2 (ja) * | 2005-07-19 | 2010-04-21 | 株式会社デンソー | 燃料噴射装置および燃料噴射装置の異常検出方法 |
JP4506662B2 (ja) * | 2005-12-05 | 2010-07-21 | 株式会社デンソー | 燃料噴射制御装置 |
JP4607770B2 (ja) * | 2006-01-11 | 2011-01-05 | 株式会社デンソー | 蒸発燃料処理装置 |
JP4899791B2 (ja) * | 2006-10-30 | 2012-03-21 | 株式会社デンソー | 燃料噴射制御装置及び燃料供給系の診断方法 |
DE602007006656D1 (de) * | 2007-07-05 | 2010-07-01 | Magneti Marelli Powertrain Spa | Verfahren zur Steuerung eines Überdruckventils in einem Common-Rail-Kraftstoffversorgungssystem |
JP4407730B2 (ja) * | 2007-08-31 | 2010-02-03 | 株式会社デンソー | 内燃機関の燃料噴射制御装置 |
JP4479764B2 (ja) * | 2007-08-31 | 2010-06-09 | 株式会社デンソー | 燃料噴射制御装置およびそれを用いた燃料噴射システム |
US7904233B2 (en) * | 2008-04-08 | 2011-03-08 | Gm Global Technology Operations, Inc. | Fuel injection measurement and diagnostics |
-
2007
- 2007-01-22 DE DE102007003150A patent/DE102007003150B4/de not_active Expired - Fee Related
-
2008
- 2008-01-22 WO PCT/EP2008/050672 patent/WO2008090135A1/de active Application Filing
- 2008-01-22 US US12/523,885 patent/US8108124B2/en not_active Expired - Fee Related
- 2008-01-22 CN CN200880002716.8A patent/CN101583787B/zh active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3804012A1 (de) * | 1988-02-10 | 1989-08-24 | Daimler Benz Ag | Verfahren zum verhindern des ueberdrehens einer brennkraftmaschine |
DE10032263A1 (de) * | 1999-07-06 | 2001-02-15 | Scania Cv Ab | Dieselmotor und Verfahren für dessen Regelung |
DE10162989C1 (de) * | 2001-12-20 | 2003-10-09 | Siemens Ag | Schaltungsanordnung zum Regeln einer regelbaren Kraftstoffpumpe, Verfahren zum Regeln einer Förderleistung und Verfahren zum Überprüfen der Funktionsfähigkeit einer regelbaren Kraftstoffpumpe |
DE102004061474A1 (de) * | 2004-12-21 | 2006-06-29 | Mtu Friedrichshafen Gmbh | Verfahren und Einrichtung zur Regelung des Raildrucks |
Also Published As
Publication number | Publication date |
---|---|
US20100049426A1 (en) | 2010-02-25 |
DE102007003150B4 (de) | 2008-12-11 |
CN101583787A (zh) | 2009-11-18 |
CN101583787B (zh) | 2012-12-26 |
DE102007003150A1 (de) | 2008-07-31 |
US8108124B2 (en) | 2012-01-31 |
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