EP2076667A1 - Verfahren und vorrichtung zur überwachung eines kraftstoffeinspritzsystems - Google Patents
Verfahren und vorrichtung zur überwachung eines kraftstoffeinspritzsystemsInfo
- Publication number
- EP2076667A1 EP2076667A1 EP07803190A EP07803190A EP2076667A1 EP 2076667 A1 EP2076667 A1 EP 2076667A1 EP 07803190 A EP07803190 A EP 07803190A EP 07803190 A EP07803190 A EP 07803190A EP 2076667 A1 EP2076667 A1 EP 2076667A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- value
- change
- internal combustion
- error
- combustion engine
- 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.)
- Granted
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
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
-
- 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
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
- F02D41/28—Interface circuits
- F02D2041/286—Interface circuits comprising means for signal processing
- F02D2041/288—Interface circuits comprising means for signal processing for performing a transformation into the frequency domain, e.g. Fourier transformation
-
- 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
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1012—Engine speed gradient
-
- 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
- F02D2250/14—Timing of measurement, e.g. synchronisation of measurements to the engine cycle
-
- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1497—With detection of the mechanical response of the engine
-
- 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
-
- 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
Definitions
- the invention relates to an apparatus and a method for monitoring a fuel injection system.
- From DE 195 20 300 is a method for detecting a leak in a
- any injectors in common-rail systems ie in solenoid valve injectors and / or in Piezoakto- ren used. It is particularly advantageous to monitor the control of the start of injection or the injection position, since the prior art only provides insufficient monitoring devices for this purpose.
- a monitoring of the start of injection is advantageous because the start of injection has both an influence on the performance of the internal combustion engine, as well as on the consumption of the internal combustion engine. Furthermore, faults or tolerances at the start of injection also affect the exhaust emissions.
- the start of injection is usually controlled in order to inject fuel into the cylinders at desired times or desired piston positions of the diesel internal combustion engine. If there are errors or tolerances, so that too early or too late injected, so this is not recognized in conventional injection systems. Such defects may occur in the area of the control unit, the injection system, d. H. the injectors and / or the sensor elements that detect, for example, the start of injection and / or the position of the internal combustion engine occur. Such changes in the start of injection could, among other things, result in a change in the emission behavior, the driving behavior or the noise emission.
- the error of the detection of the sensor signals, the determination of the manipulated variable in the control unit and / or the actuator, which performs the injection can be assigned.
- the angular acceleration or another variable derived from the speed signal and / or an angle signal is used as the measured variable.
- the measured variable is determined from a structure-borne noise signal or a combustion chamber pressure signal.
- FIG. 1 shows a block diagram of the essential elements
- FIG. 2 plots different signals over the start of injection
- FIG. 3 shows a flow chart of the method according to the invention.
- FIG. 1 shows the device according to the invention as a block diagram.
- 100 denotes an internal combustion engine to which at least one first sensor 110 and one actuator 120 are assigned.
- the sensor 110 acts on a
- Control unit 130 with a signal N and the control unit 130 in turn also acts on the actuator 120 with a drive signal A. Furthermore, the control unit 130 processes the output signal of a second sensor 140.
- the illustrated internal combustion engine 100 is preferably a self-igniting internal combustion engine.
- the first sensor 110 detects a signal N which corresponds to the rotational speed of the internal combustion engine.
- different variables can be determined on the basis of the speed signal.
- filters such as a differentiation, a bandpass filter or a discrete Fourier transform, the angular acceleration or other derivatives of the speed signal.
- These signals can be supplied instead of the speed signal N of the control unit 130.
- sensors may be provided which may be provided with further variables characterizing the operating state of the internal combustion engine.
- sensors are, for example, temperature sensors and / or pressure sensors which detect the temperature of the internal combustion engine, the pressure of the fuel and / or other variables.
- the actuator 120 is preferably an injector that includes a solenoid valve or a piezoactuator.
- a controller instead of such a controller, other actuators that affect the fuel metering, can be used.
- a pump-nozzle unit, a distributor pump or a series pump can be provided.
- the actuator of the internal combustion engine measures a certain amount of fuel at a specific point in time or at a specific position of the crankshaft of the internal combustion engine. It is provided, for example, that the energization start of the solenoid valve the
- the control unit 130 determines the drive signal based on the signals of the first sensor and the second sensor 140.
- the second sensor 140 in particular detects variables which characterize the operating state of the vehicle or ambient conditions. In this case, in particular temperature and / or pressure variables are detected. Furthermore, it can be provided that the second sensor or the first sensor detects quantities that characterize the exhaust system of the internal combustion engine. This is it For example, the temperature or the pressure in the exhaust gas or in the intake fresh air.
- the control unit 130 determines the drive signal A for the actuator 120. It may be provided that only one controller is provided, in which, based on the input variables, a manipulated variable is specified. Furthermore, a regulation can be provided which regulates, for example, the start of activation or another variable characterizing this, such as, for example, the start of injection, the start of combustion or other variables, ie. H. compares with a setpoint and depends on the
- Deviation between setpoint and actual value changes the control signal accordingly until the setpoint and the actual value match.
- the metering of fuel has a significant influence on the exhaust emissions.
- errors throughout the system i. H. in the actuator, in the internal combustion engine, in the sensors 110 or in the control unit 130 effects on the fuel metering. Ie. in case of an error, the desired amount of fuel is not metered at the desired time. This in turn has effects on the behavior of the internal combustion engine, d. H.
- an increase in fuel consumption and / or increased exhaust emissions Both must be reliably detected and avoided.
- FIG. 2 shows the relationship between the measured values M and measured value changes D for three different injection starts A.
- Measured values M are preferably determined from the speed increase.
- an angular acceleration which is formed by differentiation of the speed signal can be used as the measured value.
- the result of another filtering method on the rotational speed signal such as a bandpass filtering or a discrete
- the output value for the start of control is specified.
- the actuator is usually controlled in the present operating conditions.
- a first drive value is Al and a second value A2 entered for the control start, in which the output value AO is reduced by a small value or increased by a small value.
- the measured value change Dl corresponds to the quotient of the measured value M between the state with the start of control AO and the start of control Al on. Accordingly, the value D2 gives the quotient of the measured values between the operating point with the
- the value DO assumes the value 1, since this indicates the quotient between the activation start AO and the activation start AO.
- step 300 the control signal which is usual in the operating state is output with the control start AO and the measured value MO is detected.
- the start of control is changed to the value Al and the measured value Ml is detected.
- the value for the start of control is set to the value A2 and the measured value M2 is determined.
- the measured values used are preferably the rotational speed or variables derived from the rotational speed. As an alternative to the rotational speed, other variables that characterize the torque output by the internal combustion engine can also be evaluated.
- the quotient Dl, d. H. the quotient between the measured value Ml and the measured value MO is determined.
- the quotient D2, d. H. the quotient between the measured value M2 and MO is calculated.
- the difference V between the two quotients Dl and D2 is determined.
- the subsequent query 360 checks whether the difference V is smaller than a first threshold Sl. If this is the case, the program ends in step
- step 370 with a detection for errors. If the query 360 recognizes that the difference V is not smaller than the threshold value S1, the query 380 follows. This checks whether the difference V is greater than or equal to the second threshold value S2. If so, then an error is also detected in step 370. If this is not the case, a fault-free state is detected in step 390.
- Ie it is checked whether the difference of the quotients of measured values determined from the rotational speed lies in a specific measuring window, which is defined by the values S1 and S2, where S1 is smaller than S2. If this is the case, ie the measured values for the difference V lie in these sem window, is detected on a faultless and otherwise on a faulty operating state.
- further measuring points are defined, ie. H. that the start of tax is changed by further smaller amounts or by an amount between AO and Al or between AO and A2 and the corresponding differences are calculated and evaluated accordingly.
- a plurality of ratios are formed and these are likewise compared with threshold values. Ie. It is checked whether a change in the start of control is an expected change in the
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006046840A DE102006046840A1 (de) | 2006-10-02 | 2006-10-02 | Verfahren und Vorrichtung zur Überwachung eines Kraftstoffeinspritzsystems |
PCT/EP2007/059212 WO2008040605A1 (de) | 2006-10-02 | 2007-09-04 | Verfahren und vorrichtung zur überwachung eines kraftstoffeinspritzsystems |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2076667A1 true EP2076667A1 (de) | 2009-07-08 |
EP2076667B1 EP2076667B1 (de) | 2012-11-14 |
Family
ID=38692032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07803190A Not-in-force EP2076667B1 (de) | 2006-10-02 | 2007-09-04 | Verfahren und vorrichtung zur überwachung eines kraftstoffeinspritzsystems |
Country Status (5)
Country | Link |
---|---|
US (1) | US8166806B2 (de) |
EP (1) | EP2076667B1 (de) |
CN (1) | CN101523037B (de) |
DE (1) | DE102006046840A1 (de) |
WO (1) | WO2008040605A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102010029840B4 (de) * | 2010-06-09 | 2023-03-23 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine |
US9657653B2 (en) | 2014-06-09 | 2017-05-23 | Caterpillar Inc. | Gas pressure high and low detection |
DE102016219575B3 (de) * | 2016-10-10 | 2017-11-30 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine |
DE102016219577B4 (de) * | 2016-10-10 | 2018-09-27 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine |
DE102016219572B3 (de) * | 2016-10-10 | 2017-11-30 | Continental Automotive Gmbh | Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60142035A (ja) * | 1983-12-29 | 1985-07-27 | Mazda Motor Corp | エンジンの燃料供給装置 |
DE19520300A1 (de) | 1995-06-02 | 1996-12-05 | Bosch Gmbh Robert | Einrichtung zur Erkennung eines Lecks in einem Kraftstoffversorgungssystem |
JPH0968086A (ja) * | 1995-08-31 | 1997-03-11 | Nissan Motor Co Ltd | 燃料ポンプ |
EP0795076B1 (de) * | 1995-09-28 | 2001-03-21 | Robert Bosch Gmbh | Verfahren und vorrichtung zur überwachung eines kraftstoffzumesssystems |
DE19548279B4 (de) * | 1995-09-28 | 2006-12-14 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumeßsystems |
US6311674B1 (en) * | 1998-04-15 | 2001-11-06 | Denso Corporation | Fuel injection system for internal combustion engine |
JP2001098989A (ja) * | 1999-09-29 | 2001-04-10 | Mazda Motor Corp | エンジンの制御装置及びエンジンの制御装置の異常診断装置 |
IT1319633B1 (it) * | 2000-01-18 | 2003-10-20 | Fiat Ricerche | Metodo di valutazione della funzionalita' di un impianto di iniezionea collettore comune di un motore a combustione interna. |
US6557530B1 (en) * | 2000-05-04 | 2003-05-06 | Cummins, Inc. | Fuel control system including adaptive injected fuel quantity estimation |
IT1321068B1 (it) | 2000-11-14 | 2003-12-30 | Fiat Ricerche | Metodo di diagnosi di perdite in un impianto di iniezione a collettore comune di un motore a combustione interna. |
JP3894088B2 (ja) * | 2002-10-07 | 2007-03-14 | 株式会社日立製作所 | 燃料供給装置 |
JP3972881B2 (ja) * | 2003-09-30 | 2007-09-05 | トヨタ自動車株式会社 | 内燃機関の燃料噴射制御装置 |
JP4438553B2 (ja) * | 2004-07-30 | 2010-03-24 | トヨタ自動車株式会社 | 内燃機関の高圧燃料系統の制御装置 |
DE102007021594B4 (de) * | 2007-05-08 | 2016-06-02 | Continental Automotive Gmbh | Verfahren zur Diagnose der Undichtigkeit eines Injektors sowie zugehöriges Steuergerät |
DE102008044050A1 (de) * | 2007-12-19 | 2009-06-25 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Kraftstoffsystems |
-
2006
- 2006-10-02 DE DE102006046840A patent/DE102006046840A1/de not_active Withdrawn
-
2007
- 2007-09-04 CN CN2007800370562A patent/CN101523037B/zh not_active Expired - Fee Related
- 2007-09-04 US US12/305,167 patent/US8166806B2/en not_active Expired - Fee Related
- 2007-09-04 WO PCT/EP2007/059212 patent/WO2008040605A1/de active Application Filing
- 2007-09-04 EP EP07803190A patent/EP2076667B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2008040605A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101523037A (zh) | 2009-09-02 |
EP2076667B1 (de) | 2012-11-14 |
CN101523037B (zh) | 2013-03-27 |
US8166806B2 (en) | 2012-05-01 |
WO2008040605A1 (de) | 2008-04-10 |
DE102006046840A1 (de) | 2008-04-03 |
US20100050755A1 (en) | 2010-03-04 |
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