EP1711704B8 - Verfahren zum überwachen der funktionsfähigkeit eines kraftstoffeinspritzsystems - Google Patents
Verfahren zum überwachen der funktionsfähigkeit eines kraftstoffeinspritzsystemsInfo
- Publication number
- EP1711704B8 EP1711704B8 EP06704233A EP06704233A EP1711704B8 EP 1711704 B8 EP1711704 B8 EP 1711704B8 EP 06704233 A EP06704233 A EP 06704233A EP 06704233 A EP06704233 A EP 06704233A EP 1711704 B8 EP1711704 B8 EP 1711704B8
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- fuel
- accumulator
- pressure accumulator
- detected
- 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.)
- Expired - Fee Related
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
- F02D41/3863—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
- F02D41/22—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
- F02D41/30—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
- 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
-
- 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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/003—Measuring variation of fuel pressure in high pressure line
-
- 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
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/224—Diagnosis of the fuel system
- F02D2041/225—Leakage detection
-
- 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
- F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
Definitions
- the invention relates to a method for monitoring the operability of a fuel injection system according to claim 1.
- a fuel supply system for an internal combustion engine of a motor vehicle in which fuel is pumped by a pump in a pressure accumulator.
- injection valves are connected, which supply the fuel of the internal combustion engine according to a control by a control unit.
- the control unit causes a pressure change in the pressure accumulator. Subsequently, the time required to set the pressure change is detected. The recorded time is compared with experimentally determined time values and an error is concluded if the recorded time values do not correspond to the stored time values.
- the object of the invention is to provide an improved
- the object of the invention is achieved by the features of claim 1.
- the method according to claim 1 has the advantage that an analysis of the cause of the error is carried out and a more accurate determination of the error source is made possible.
- the leaktightness of the injection system is recognized as a source of error if the setpoint pressure in the accumulator is undershot during a change in the injection quantity and a constant pressure is established in the pressure accumulator. In this way, leaks in the pressure system of the injection system can be accurately detected. Thus, corresponding emergency programs can be processed by the control unit.
- Fuel pressure in the accumulator the fuel supply detected as a source of error can be carried out and, upon detection of a malfunction of the fuel supply system by the control unit, a corresponding emergency program can be used.
- Figure 1 is a schematic representation of a fuel injection system
- FIG. 2 shows two diagrams for detecting a first error case
- 3 shows two diagrams for detecting a second error case.
- FIG. 1 shows a schematic representation of a fuel injection system for an internal combustion engine, in particular a common rail injection system.
- the injection system has a high-pressure accumulator 1, which is connected to injection valves 2.
- the high-pressure accumulator 1 via a
- a control unit 6 which controls the fuel supply system 4 and the injection valves 2 as a function of operating conditions of an internal combustion engine 8.
- the control unit 6 has a data memory 7 in which corresponding control programs are stored.
- a control line 11 is provided between the control unit 6 and the Kraftstoffzulite- system 4.
- 8 sensors 9 are arranged on the internal combustion engine, which detect the operating conditions of the internal combustion engine 8. As operating conditions are For example, the speed and accelerator pedal position determined and forwarded to the control unit 6.
- control lines are formed between the injection valves 2 and the control unit 6 for controlling the injection valves 2.
- a pressure sensor 10 is provided on the high pressure accumulator 1, which detects the fuel pressure in the high pressure accumulator 1 and forwards it to the control unit 6.
- the task of the fuel supply system 4 is to supply the high-pressure accumulator 1 with fuel according to the control by the control unit 6 with a desired setpoint pressure.
- the fuel supply system 4 may have various components.
- the fuel supply system 4 includes a fuel pump 12 and an inflow control valve 13 interposed between the fuel tank 5 and the fuel pump 12.
- a pressure valve 14 is connected, the output of which is connected to a return line 15.
- a flow cross-section of the inflow control valve 13 is opened up by the control unit 6 to a greater or lesser extent, so that more or less fuel can be conveyed into the high-pressure accumulator 1 by the fuel pump 12.
- the pressure valve 14 is available, which is also controlled by the control unit 6. If the pressure valve 14 is opened by the control unit 6, fuel which has already been compressed by the fuel pump 12 and pumped into the supply line 3 is conveyed via the return line 15 back into the fuel tank 5. Thus, the fuel pressure in the high-pressure accumulator 1 is lowered.
- the fuel supply drove to the high-pressure accumulator 1, the fuel pressure in the high-pressure accumulator 1 and set the output from the injectors 2 amount of fuel.
- the fuel pressure with which the fuel is injected is an essential feature for the exhaust quality of the internal combustion engine and therefore must be precisely adhered to.
- the fuel pressure in the high-pressure accumulator is also a measurement signal that can be used for an error analysis of the injection system.
- FIG. 2 shows in an upper diagram the time profile of the quantity of fuel which is emitted by the injection valves 2.
- the course of the pressure in the high-pressure accumulator 1, which is detected by the pressure sensor 10 is plotted in parallel over time.
- the upper diagram shows that the fuel quantity at time t ⁇ decreases from an upper value to a lower value at time t1 and then increases again to a higher value at time t2, again to fall to a lower value at time t3.
- the time period between the Oth time t ⁇ and the third time t3 is longer than 1 second.
- both the nominal value of the fuel pressure and the measured pressure p are plotted over time in the lower diagram.
- the desired value is predetermined by control programs depending on operating conditions of the internal combustion engine.
- the controller 6 controls the fuel supply system 4 so that the target pressure is adjusted. From the lower diagram, it can be seen that during the measurement period, i. H . From the OT point of time until the third time t3, the detected pressure value p remains almost constant and is below the setpoint pressure.
- control unit 6 detects that a malfunction of the fuel supply system 4 is present. Furthermore, that recognizes Control unit 6 due to the present situation that the injected fuel quantity changes over time and the pressure prevailing in the high-pressure accumulator 1 fuel pressure remains almost constant and below the target pressure that a malfunction of the pressure valve is present. For the detection of a nearly constant pressure, a pressure range of, for example, 3% is set, in which the pressure in the high-pressure accumulator 1 can change during the measurement, although the control unit 6 nevertheless detects a constant fuel pressure in the high-pressure accumulator 1.
- an appropriately prepared emergency program is used by the control unit 6 for the further control of the fuel supply system 4 and / or the injection valves 2.
- the emergency program is stored in the memory 7 of the control unit 6.
- FIG. 3 shows a further error case.
- FIG. 3 again shows in the upper diagram the change with time of the fuel quantity injected by the injection valves 2.
- the nominal value of the fuel pressure and the measured fuel pressure p are plotted in parallel over time. Also in this situation, the injected from the injectors 2 fuel in the
- the period between the Oth time t ⁇ and the third time t3 corresponds to approximately 1 second.
- the time course of the measured pressure in Hochdruckspei- rather 1 has a fuel change opposite pressure change, d. H . as the amount of fuel injected decreases, the fuel pressure in the high pressure Memory 1 to and vice versa.
- the control unit 6 clearly detects a malfunction of the inflow control valve 13.
- a corresponding emergency program for the further control of the feed system 4 and / or the injection valves 2 is used by the control unit 6.
- the emergency program which is used in a malfunction of the inflow control valve, for example, reduces the amount of fuel to be injected from the injectors 2.
- the desired value of the pressure is also limited.
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)
- Fuel-Injection Apparatus (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005004423A DE102005004423B3 (de) | 2005-01-31 | 2005-01-31 | Verfahren zum Überwachen der Funktionsfähigkeit eines Kraftstoffeinspritzsystems |
PCT/EP2006/050334 WO2006079606A1 (de) | 2005-01-31 | 2006-01-20 | Verfahren zum überwachen der funktionsfähigkeit eines kraftstoffeinspritzsystems |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1711704A1 EP1711704A1 (de) | 2006-10-18 |
EP1711704B1 EP1711704B1 (de) | 2008-03-05 |
EP1711704B8 true EP1711704B8 (de) | 2008-04-23 |
Family
ID=36088220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06704233A Expired - Fee Related EP1711704B8 (de) | 2005-01-31 | 2006-01-20 | Verfahren zum überwachen der funktionsfähigkeit eines kraftstoffeinspritzsystems |
Country Status (5)
Country | Link |
---|---|
US (1) | US7444993B2 (de) |
EP (1) | EP1711704B8 (de) |
CN (1) | CN100434683C (de) |
DE (2) | DE102005004423B3 (de) |
WO (1) | WO2006079606A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7650778B2 (en) * | 2007-06-05 | 2010-01-26 | Caterpillar Inc. | Method and apparatus for testing a gear-driven fuel pump on a fuel injected IC engine |
DE102007028900B4 (de) * | 2007-06-22 | 2013-06-27 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Diagnose eines mit einer Kraftstoffverteilerleiste in Verbindung stehenden Einspritzventils einer Brennkraftmaschine |
DE102007044001B4 (de) * | 2007-09-14 | 2019-08-01 | Robert Bosch Gmbh | Verfahren zur Steuerung eines Kraftstoffeinspritzsystems einer Brennkraftmaschine |
DE102007057311B3 (de) * | 2007-11-28 | 2009-06-10 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Fehlererkennung bei emissionsrelevanten Steuereinrichtungen in einem Fahrzeug |
DE102008035985B4 (de) * | 2008-08-01 | 2010-07-08 | Continental Automotive Gmbh | Verfahren und Vorrichtung zur Regelung des Kraftstoffdruckes im Druckspeicher eines Common-Rail-Einspritzsystems |
JP4909973B2 (ja) * | 2008-11-14 | 2012-04-04 | 日立オートモティブシステムズ株式会社 | 内燃機関の制御装置 |
US8281768B2 (en) * | 2009-03-04 | 2012-10-09 | GM Global Technology Operations LLC | Method and apparatus for controlling fuel rail pressure using fuel pressure sensor error |
CN101871403B (zh) * | 2009-04-22 | 2014-04-02 | 通用汽车环球科技运作公司 | 在驱动状态期间压力传感器的诊断***和方法 |
DE102009043718B4 (de) | 2009-10-01 | 2015-08-20 | Avl List Gmbh | System und Verfahren zur Messung von Einspritzvorgängen in einer Verbrennungskraftmaschine |
DE102010031220A1 (de) * | 2010-07-12 | 2012-01-12 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Betreiben eines Kraftstoffeinspritzsystems |
JP5387538B2 (ja) * | 2010-10-18 | 2014-01-15 | 株式会社デンソー | 筒内噴射式内燃機関のフェールセーフ制御装置 |
JP5273310B2 (ja) * | 2011-05-13 | 2013-08-28 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
BR112014014260A2 (pt) * | 2011-12-13 | 2017-06-13 | Scania Cv Ab | dispositivo e método para detecção de falha em um sistema de suprimento de combustível de um veículo motorizado |
EP2791496B1 (de) * | 2011-12-13 | 2017-09-20 | Scania CV AB | Vorrichtung und verfahren zur fehlererkennung in einem kraftstoffversorgungssystem eines kraftfahrzeugs |
DE102016214760B4 (de) * | 2016-04-28 | 2018-03-01 | Mtu Friedrichshafen Gmbh | Verfahren zum Betrieb einer Brennkraftmaschine, Einrichtung zum Steuern und/oder Regeln einer Brennkraftmaschine, Einspritzsystem und Brennkraftmaschine |
DE102016208088A1 (de) * | 2016-05-11 | 2017-11-16 | Robert Bosch Gmbh | Verfahren zur Steuerung eines Kraftstoffversorgungssystems |
DE102016219479A1 (de) * | 2016-10-07 | 2018-04-12 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Ermitteln eines Schädigungszustands einer Komponente eines Fahrzeugs |
US11352965B2 (en) | 2019-10-18 | 2022-06-07 | Caterpillar Inc. | Reverse flow detection system |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1030121A (zh) * | 1987-04-16 | 1989-01-04 | 根纳·奥尔森 | 内燃机的喷射及控制*** |
US5616837A (en) * | 1994-06-06 | 1997-04-01 | Ford Motor Company | Fuel line pressure test |
DE19521791A1 (de) * | 1995-06-15 | 1996-12-19 | Daimler Benz Ag | Verfahren zum Erkennen von Betriebsstörungen in einer Kraftstoffeinspritzanlage einer Brennkraftmaschine |
JP3680515B2 (ja) * | 1997-08-28 | 2005-08-10 | 日産自動車株式会社 | 内燃機関の燃料系診断装置 |
JPH1182134A (ja) * | 1997-09-03 | 1999-03-26 | Fuji Heavy Ind Ltd | 筒内燃料噴射エンジンの高圧燃料系診断装置及び制御装置 |
DE19757594C2 (de) * | 1997-12-23 | 2002-11-28 | Siemens Ag | Verfahren und Vorrichtung zur Funktionsüberwachung eines Druckreglers |
US6053147A (en) * | 1998-03-02 | 2000-04-25 | Cummins Engine Company, Inc. | Apparatus and method for diagnosing erratic pressure sensor operation in a fuel system of an internal combustion engine |
US6076504A (en) * | 1998-03-02 | 2000-06-20 | Cummins Engine Company, Inc. | Apparatus for diagnosing failures and fault conditions in a fuel system of an internal combustion engine |
JP3884577B2 (ja) * | 1998-08-31 | 2007-02-21 | 株式会社日立製作所 | 内燃機関の制御装置 |
DE19856203C2 (de) * | 1998-12-05 | 2001-12-06 | Bosch Gmbh Robert | Kraftstoffversorgungssystem für eine Brennkraftmaschine insbesondere eines Kraftfahrzeugs |
DE19946506C1 (de) * | 1999-09-28 | 2001-07-19 | Siemens Ag | Verfahren zum Erkennen von Fehlfunktionen im Drucksystem einer an einem Verbrennungsmotor zu verwendenden Kraftstoff-Einspritzanlage |
DE10061855C2 (de) | 2000-12-12 | 2003-05-22 | Bosch Gmbh Robert | Verfahren, Computerprogramm und Steuer- und/oder Regelgerät zum Betreiben einer Brennkraftmaschine, sowie Brennkraftmaschine |
DE10259797A1 (de) * | 2002-12-19 | 2004-07-15 | Siemens Ag | Vorrichtung und Verfahren zum Erkennen von Fehlern in einem Kraftstoffeinspritzsystem |
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 |
-
2005
- 2005-01-31 DE DE102005004423A patent/DE102005004423B3/de not_active Expired - Fee Related
-
2006
- 2006-01-20 WO PCT/EP2006/050334 patent/WO2006079606A1/de active IP Right Grant
- 2006-01-20 US US10/598,917 patent/US7444993B2/en active Active
- 2006-01-20 EP EP06704233A patent/EP1711704B8/de not_active Expired - Fee Related
- 2006-01-20 DE DE502006000413T patent/DE502006000413D1/de active Active
- 2006-01-20 CN CNB2006800000965A patent/CN100434683C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO2006079606A1 (de) | 2006-08-03 |
US20080109144A1 (en) | 2008-05-08 |
CN1942663A (zh) | 2007-04-04 |
DE502006000413D1 (de) | 2008-04-17 |
EP1711704A1 (de) | 2006-10-18 |
CN100434683C (zh) | 2008-11-19 |
DE102005004423B3 (de) | 2006-06-14 |
US7444993B2 (en) | 2008-11-04 |
EP1711704B1 (de) | 2008-03-05 |
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