WO2006040617A1 - Procede et appareil de surveillance de l'injection de carburant - Google Patents

Procede et appareil de surveillance de l'injection de carburant Download PDF

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Publication number
WO2006040617A1
WO2006040617A1 PCT/IB2004/052070 IB2004052070W WO2006040617A1 WO 2006040617 A1 WO2006040617 A1 WO 2006040617A1 IB 2004052070 W IB2004052070 W IB 2004052070W WO 2006040617 A1 WO2006040617 A1 WO 2006040617A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
pressure
value
values
max
Prior art date
Application number
PCT/IB2004/052070
Other languages
English (en)
Inventor
Korhan Kanar
Ergun Guraslan
Original Assignee
Ford Otomativ Sanayi Anonim Sirketi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ford Otomativ Sanayi Anonim Sirketi filed Critical Ford Otomativ Sanayi Anonim Sirketi
Priority to PCT/IB2004/052070 priority Critical patent/WO2006040617A1/fr
Priority to TR2007/02471T priority patent/TR200702471T1/xx
Priority to JP2007536274A priority patent/JP2008516153A/ja
Priority to DE112004002987T priority patent/DE112004002987B4/de
Publication of WO2006040617A1 publication Critical patent/WO2006040617A1/fr

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
    • 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
    • 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
    • F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
    • F02D2041/1413—Controller structures or design
    • F02D2041/1432—Controller structures or design the system including a filter, e.g. a low pass or high pass filter
    • 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
    • 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
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0602—Fuel pressure
    • F02D2200/0604—Estimation of 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
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0606—Fuel temperature

Definitions

  • the present invention relates to a method, and an apparatus exploiting said method, for monitoring the fuel injection in an internal combustion engine, especially a diesel engine which employs injectors connected to a common high pressure reservoir (common rail) for the purpose of detection of possible faults within the fuel injection system.
  • Common rail type fuel injection systems for internal combustion engines are well known in the art.
  • high-pressure fuel fed from a high-pressure fuel pump is stored in a common reservoir (i.e., the common rail).
  • High-pressure fuel in the rail is injected into the respective cylinders of the engine via injectors connected to the common rail.
  • the rail acts as a reservoir which stores high pressure fuel and distributes it to the respective fuel injectors.
  • ECU electronice control unit
  • said common rail type injection systems may suffer from faults such as fuel leakage from the reservoir, overflow in the injectors, clogging of the fuel filters, malfunction of the high-pressure pump, blocking of the fuel return lines, etc. Said faults may result in high fuel consumption and even engine failure. It is therefore well- known in the prior art to equip said injection systems with means for detecting failures of the fuel injection system.
  • JP 8-4577 --. discloses a fuel injection system comprising a pressure sensor for detecting the pressure of the fuel in the common rail and means for measuring the difference of the pressures in the common rail before and after the fuel injection from the fuel injection valve, i.e., the pressure drop in the common rail during the fuel injection period. Furthermore, a failure detecting means estimates the pressures in the common rail before and after the fuel injection, and determines that the fuel injection system has failed if said difference is larger than a predetermined limit.
  • EP 0860601 discloses an electronic control unit (ECU) which measures the pressure and the temperature of the fuel in the common rail, and determines the bulk modulus of elasticity of the fuel based on the pressure and the temperature of the fuel.
  • the ECU calculates an estimated value of the pressure change in the common rail during the fuel injection period using the determined bulk modulus. If the difference between the estimated value of the pressure change and the pressure change actually measured during the fuel injection period is large, the ECU determines that the fuel injection system has failed.
  • EP 1336745 --. describes a method of controlling injection in a vehicle internal combustion engine, wherein the intake air flow and exhaust lambda are measured to estimate the fuel quantity actually injected into the engine and perform a closed-loop control whereby the estimated fuel quantity is made to substantially equal the nominal fuel quantity calculated to meet vehicle user requirements. Moreover, the difference between the nominal fuel quantity and the estimated fuel quantity is used to calculate a correction factor by which the nominal fuel quantity is corrected.
  • United States patent no. US 5727516 --. explains a method of controlling the operation of an internal combustion engine such that the fuel pressure in the common fuel supply line between the end of an injection and the start of a fuel supply period is monitored at distinct timely spaced measurement points and, if a pressure difference between the measurement points is sensed in excess of a predetermined limit value indicating an injector malfunction, the high pressure fuel supply to the common fuel supply line is interrupted by deactivating the high pressure fuel pump while fuel injection through the operative nozzles is maintained so as to rapidly reduce the pressure in the common fuel supply line.
  • control methods are mainly focused on measuring pressure values in the common rail.
  • the pressure of the fuel in the common rail varies in a very wide range in order to control both the fuel injection amount and the rate of injection in accordance with the operating condition of the engine. In some applications said pressure ranges from 10 MPa to 150 MPa.
  • the change is very large, the determination of the failure by way of measuring the pressure is either not possible or inaccurate.
  • the object of the present invention is to provide means for accurate determination of a fault in the fuel injection system.
  • Another object of the present invention is to determine faults in the fuel injection system under transient conditions.
  • the ECU generates an actuation signal to control the opening/closing of the valve in order to maintain a predetermined level of fuel pressure in the rail.
  • Said actuation signal is a function of the amount of fuel flowing through the injectors per stroke, the target pressure in the rail, speed of the engine, and the temperature of the fuel. Based on this relation, the present invention makes use of the actuation signal for fault detection, and further employs measurements of pressure, engine speed and fuel temperature.
  • a central function for detecting faults is only triggered if all the filtered input variables are within specified limits and equilibrium flags are TRUE. A correction depending on fuel quantity and temperature is applied to the actuation signal. Central function generates a general fault message if the corrected actuation signal is outside a predetermined calibration interval.
  • FIG. 1 shows a flowchart of the method
  • Fig. 2 illustrates a flowchart of the equilibrium check block
  • Fig. 3 shows a schematic view of the setup for the present method.
  • the setup for the application of present method involves a pressure sensor in the rail in order to measure the actual pressure value.
  • the engine speed (n) is detected by means of a sensor preferably placed at the output shaft of the engine.
  • a temperature sensor placed in the fuel system. The ECU receives signals from said sensors, and processes these signals to detect a possible failure.
  • the actual fuel pressure value (p actual ), engine speed (n), and actual fuel temperature (T fuel ) are measured when the vehicle is operating on the road, i.e. under transient conditions.
  • the measurements may be sampled continuously or at predetermined time intervals.
  • the ECU generates an act uation signal to the valve to keep the valve open. The magnitude of this signal is i valve
  • ECU instantly calculates a target pressure (p ), and intended fuel injection quantity (q inj ). If all these values, namely p actual , T fuel , i valve , p sel , q inj and n, satisfy certain criteria, the
  • the present method comprises the following steps:
  • n - a PPly a filter to the engine speed (n) and ensure that the filtered value is within an interval defined by preset minimum (n nun ) and maximum (n max ) values of speed;
  • T fuel - measure fuel temperature (T fuel ); apply a filter to the fuel temperature (T ) and check if the filtered value lies within an interval defined by preset minimum (T min ) and maximum (T max )
  • the filters used in the system are preferably first order:
  • k is the index or measured signal
  • x is the input signal
  • y the output signal of the filter.
  • a is a parameter defined by the manufacturer and/or user. If the value of a, is close to 0, the y(k) value is close to the x(k) value. On the other hand, if a gets closer to 1, the gap between the x(k) and y(k) values increases.
  • This filter is given here for the purposes of clarity only, skilled persons in the art may develop many filters that equally suit the purposes of this invention.
  • minimum (p mm ) and maximum (p max ) pressure values in the pressure filter are not input to the system as preset values, but rather they are instantly calculated using the measured value of the fuel quantity (q ). This provides for an improved accuracy since it takes into account the effect of fuel quantity (q ) on
  • actuation signal is a current signal, however in alternative embodiments it may be a voltage signal as well.
  • i mm minimum and maximum (i max ) values of actuation signals, against which the i is compared, are determined statistically by examining a number of normal and out-of-order vehicles.
  • equilibrium check is performed by applying at least two, preferably three, different filters to the input value.
  • Each filter may have a different time constant.
  • the absolute values of the differences of outputs of every two or more filters, e.g. first and second, and first and third, are estimated. Said absolute values are compared against at least two constant, pre-determined limits, namely LIMl and LIM2.
  • the result of the equilibrium check is positive, if both absolute values are less than the corresponding limits.
  • the number of filters and the corresponding limits may be adjusted according to the desired level of accuracy, allowable computation time, etc. If the input value changes steeply, the outputs of three filters are quite different from each other. However as the input value reaches equilibrium, the outputs are less different.
  • the present invention provides an accurate and fast method of predicting the failures in the fuel injection system.
  • the fact that the measurements are done during transient conditions improves the rate of accuracy.

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)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un procédé et un appareil exploitant ledit procédé, permettant de surveiller l'injection de carburant dans un moteur à combustion interne, en particulier dans un moteur diesel comprenant un injecteur raccordé à un réservoir haute pression commun (rampe commune), afin de détecter les éventuels défauts dans le système d'injection de carburant. Pour détecter les défauts, le procédé et l'appareil décrits utilisent le signal d'activation de la soupape de la pompe haute pression, ainsi que les mesures de la pression, de la quantité et de la température du carburant, et des vérifications du filtrage et de l'équilibre.
PCT/IB2004/052070 2004-10-12 2004-10-12 Procede et appareil de surveillance de l'injection de carburant WO2006040617A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PCT/IB2004/052070 WO2006040617A1 (fr) 2004-10-12 2004-10-12 Procede et appareil de surveillance de l'injection de carburant
TR2007/02471T TR200702471T1 (tr) 2004-10-12 2004-10-12 Yakıt enjeksiyonunu izleme cihazı ve yöntemi.
JP2007536274A JP2008516153A (ja) 2004-10-12 2004-10-12 燃料噴射を監視する方法および装置
DE112004002987T DE112004002987B4 (de) 2004-10-12 2004-10-12 Verfahren und Vorrichtung zum Überwachen der Kraftstoffeinspritzung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2004/052070 WO2006040617A1 (fr) 2004-10-12 2004-10-12 Procede et appareil de surveillance de l'injection de carburant

Publications (1)

Publication Number Publication Date
WO2006040617A1 true WO2006040617A1 (fr) 2006-04-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/052070 WO2006040617A1 (fr) 2004-10-12 2004-10-12 Procede et appareil de surveillance de l'injection de carburant

Country Status (4)

Country Link
JP (1) JP2008516153A (fr)
DE (1) DE112004002987B4 (fr)
TR (1) TR200702471T1 (fr)
WO (1) WO2006040617A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105644592A (zh) * 2015-07-29 2016-06-08 兰州深蓝图形技术有限公司 铁路信号系统单设备接配线图生成方法、查询方法及装置
CN106168179A (zh) * 2015-05-19 2016-11-30 福特环球技术公司 用于将燃料供应至发动机的方法和系统
CN111237072A (zh) * 2020-03-27 2020-06-05 潍柴动力股份有限公司 一种电控柴油机喷嘴故障识别方法、系统及电子控制单元

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014205686A1 (de) * 2014-03-26 2015-10-01 Mtu Friedrichshafen Gmbh Verfahren zum Betreiben einer Brennkraftmaschine, Verfahren zum Ermitteln einer Lernstruktur für den Betrieb einer Brennkraftmaschine, Steuergerät für eine Brennkraftmaschine und Brennkraftmaschine

Citations (9)

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WO1995006814A1 (fr) * 1993-09-03 1995-03-09 Robert Bosch Gmbh Methode de diagnostic de defaillances d'un circuit a haute pression d'un systeme d'injection a haute pression d'un moteur a combustion interne
JPH084577A (ja) 1994-06-20 1996-01-09 Toyota Motor Corp 内燃機関の燃料噴射装置
US5727516A (en) 1996-04-02 1998-03-17 Mercedes - Benz Ag Method of controlling an internal combustion engine upon detection of a fault inn a fuel injection system
EP0860601A2 (fr) * 1997-02-21 1998-08-26 Toyota Jidosha Kabushiki Kaisha Système d'injection de combustible pour moteur à combustion interne
US5945596A (en) * 1995-09-28 1999-08-31 Robert Bosch Gmbh Method and device for monitoring a fuel-metering system
WO2002001058A1 (fr) * 2000-06-26 2002-01-03 Siemens Aktiengesellschaft Systeme d'injection pour moteur a combustion interne et procede de fonctionnement d'un systeme d'injection
DE10155249C1 (de) * 2001-11-09 2003-04-24 Siemens Ag Einspritzanlage sowie Verfahren zur Regelung einer Kraftstoffpunpe
EP1336745A2 (fr) 2002-02-19 2003-08-20 C.R.F. Società Consortile per Azioni Méthode et dispositif de commande de l'injection dans un moteur à combustion interne, en particulier dans un moteur Diesel à système d'injection à rampe commune
US20040020281A1 (en) * 2000-05-03 2004-02-05 Stephan Schilling Method and device for monitoring a fuel system of an internal combustion engine

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
DE19626690B4 (de) * 1996-07-03 2008-12-11 Robert Bosch Gmbh Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumeßsystems einer Brennkraftmaschine
DE19634982C2 (de) * 1996-08-29 2002-10-10 Siemens Ag Verfahren zur Überwachung eines Kraftstoffdruckes
DE10103867A1 (de) * 2000-05-03 2001-11-08 Bosch Gmbh Robert Verfahren und Vorrichtung zur Überwachung eines Kraftstoffzumess-Systems einer Brennkraftmaschine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995006814A1 (fr) * 1993-09-03 1995-03-09 Robert Bosch Gmbh Methode de diagnostic de defaillances d'un circuit a haute pression d'un systeme d'injection a haute pression d'un moteur a combustion interne
JPH084577A (ja) 1994-06-20 1996-01-09 Toyota Motor Corp 内燃機関の燃料噴射装置
US5945596A (en) * 1995-09-28 1999-08-31 Robert Bosch Gmbh Method and device for monitoring a fuel-metering system
US5727516A (en) 1996-04-02 1998-03-17 Mercedes - Benz Ag Method of controlling an internal combustion engine upon detection of a fault inn a fuel injection system
EP0860601A2 (fr) * 1997-02-21 1998-08-26 Toyota Jidosha Kabushiki Kaisha Système d'injection de combustible pour moteur à combustion interne
US20040020281A1 (en) * 2000-05-03 2004-02-05 Stephan Schilling Method and device for monitoring a fuel system of an internal combustion engine
WO2002001058A1 (fr) * 2000-06-26 2002-01-03 Siemens Aktiengesellschaft Systeme d'injection pour moteur a combustion interne et procede de fonctionnement d'un systeme d'injection
DE10155249C1 (de) * 2001-11-09 2003-04-24 Siemens Ag Einspritzanlage sowie Verfahren zur Regelung einer Kraftstoffpunpe
EP1336745A2 (fr) 2002-02-19 2003-08-20 C.R.F. Società Consortile per Azioni Méthode et dispositif de commande de l'injection dans un moteur à combustion interne, en particulier dans un moteur Diesel à système d'injection à rampe commune

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106168179A (zh) * 2015-05-19 2016-11-30 福特环球技术公司 用于将燃料供应至发动机的方法和系统
CN106168179B (zh) * 2015-05-19 2021-03-02 福特环球技术公司 用于将燃料供应至发动机的方法和系统
CN105644592A (zh) * 2015-07-29 2016-06-08 兰州深蓝图形技术有限公司 铁路信号系统单设备接配线图生成方法、查询方法及装置
CN111237072A (zh) * 2020-03-27 2020-06-05 潍柴动力股份有限公司 一种电控柴油机喷嘴故障识别方法、系统及电子控制单元
CN111237072B (zh) * 2020-03-27 2022-08-05 潍柴动力股份有限公司 一种电控柴油机喷嘴故障识别方法、系统及电子控制单元

Also Published As

Publication number Publication date
DE112004002987B4 (de) 2011-06-22
TR200702471T1 (tr) 2007-08-21
JP2008516153A (ja) 2008-05-15
DE112004002987T5 (de) 2007-09-20

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