EP1238190B1 - Procede pour ameliorer le demarrage d'un moteur a combustion interne equipe d'un systeme d'injection haute pression - Google Patents

Procede pour ameliorer le demarrage d'un moteur a combustion interne equipe d'un systeme d'injection haute pression Download PDF

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Publication number
EP1238190B1
EP1238190B1 EP00993428A EP00993428A EP1238190B1 EP 1238190 B1 EP1238190 B1 EP 1238190B1 EP 00993428 A EP00993428 A EP 00993428A EP 00993428 A EP00993428 A EP 00993428A EP 1238190 B1 EP1238190 B1 EP 1238190B1
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EP
European Patent Office
Prior art keywords
internal combustion
combustion engine
pressure
fuel
bkm
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 - Lifetime
Application number
EP00993428A
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German (de)
English (en)
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EP1238190A2 (fr
Inventor
Achim Przymusinski
Udo Philippi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Original Assignee
Siemens AG
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
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Publication of EP1238190A2 publication Critical patent/EP1238190A2/fr
Application granted granted Critical
Publication of EP1238190B1 publication Critical patent/EP1238190B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
    • F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
    • 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
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/0848—Circuits or control means specially adapted for starting of engines with means for detecting successful engine start, e.g. to stop starter actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N19/00—Starting aids for combustion engines, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2200/00—Parameters used for control of starting apparatus
    • F02N2200/06—Parameters used for control of starting apparatus said parameters being related to the power supply or driving circuits for the starter
    • F02N2200/063—Battery voltage

Definitions

  • the invention relates to a method for improving the Starting behavior of an internal combustion engine with a high-pressure accumulator injection system according to the preamble of the claim 1.
  • start time can only be shortened a little. In general will therefore be compared to other injection systems Extended start time for internal combustion engines with common rail injection technology currently tolerated.
  • EP 0 643 219 B1 describes a fuel injection system with a Prefeed pump, a high pressure pump, a fuel line and connected injectors known. moreover a fuel accumulator is provided which is connected to the fuel line communicates. For flushing the fuel line a valve is provided with which the fuel line can be connected to a return line to the tank. In a Starting phase, the valve is opened and in this way Flushing the fuel line and also adjusting one reached low pressure in the fuel line. Farther a bypass line is provided with which in the start phase the fuel delivered by the pre-feed pump at the High pressure pump conveyed past directly into the fuel line becomes.
  • the invention has for its object to provide a method with which the starting behavior of an internal combustion engine with a high-pressure accumulator injection system of the type mentioned Art is improved, especially the period up shortened to build up pressure in the high pressure accumulator injection system can be.
  • the system size battery voltage is evaluated. at the ignition is switched on, the operating voltage of the Internal combustion engine equipped vehicle is monitored and the occurrence of one by energizing a starter the internal combustion engine caused voltage drop at least the operating voltage as the point in time for the activation one of the hydraulic actuators volume flow control valve and pressure control valve used.
  • FIG 1 shows schematically the structure of a fuel injection system for a direct injection internal combustion engine BKM, as they are known under the common rail system used in vehicles with a diesel internal combustion engine becomes. Only those components are shown necessary for understanding the invention.
  • volume flow control valve VCV To the volume flow of the high pressure pump 14 into the high pressure accumulator 15 according to the respective operating conditions to be able to adjust the internal combustion engine BKM as required, is in the fuel line 11 between the prefeed pump 12 and the high pressure pump 14 an additional suction throttle valve, hereinafter referred to as volume flow control valve VCV, arranged, with the help of the flow of High pressure pump 14 can be controlled.
  • This volume flow control valve VCV is controlled by a control unit 16 Control line 17 driven.
  • the control unit 16 is preferably in an electronic control unit 18 of the internal combustion engine integrated, all for the operation of the internal combustion engine BKM controls and / or regulates the necessary processes.
  • the control unit 18 of the internal combustion engine BKM a large number recorded by means of appropriate sensors Input signals ES supplied.
  • the control unit 16 has a counter 32 and a memory 31 where, among other things a threshold value SW is stored, the Meaning later based on the description of Figure 2 is explained.
  • a pressure control valve PCV switched into the fuel line 11.
  • This pressure control valve PCV controls and / or regulates Excess a fuel return line 19 shown in dashed lines Fuel that is not used to maintain a required pressure in the high-pressure accumulator 15 is required, into the fuel tank 10, the holding pressure of the pressure control valve PCV from the control unit 16 via a Control line 20 is set.
  • a pressure sensor 21 is also provided. This pressure sensor 21 is used to detect the moment in the high pressure accumulator 15 prevailing pressure, on the Basis the control unit 16 according to the desired Operating conditions of the internal combustion engine BKM the pressure control via the pressure control valve PCV.
  • injectors 23 In the high pressure accumulator 15 can be shown with the help of the Arrangement generate fuel pressures from 0 to 1500 bar. These fuel pressures are available via fuel injection lines 22 to injectors referred to as injectors 23, which are arranged in the combustion chambers of the internal combustion engine BKM are at. These injectors 23 generally have an injection nozzle with a spring-loaded needle is closed. The injection process is through the Control unit 16 triggered via control lines 24 with the injectors 23 is connected. The one in the injectors 23 Leakage flow occurring is shown by dashed lines Fuel return lines 25 in the fuel tank 10 returned.
  • crankshaft sensor on the internal combustion engine BKM 33 provided, the one corresponding to the speed of the crankshaft Signal to the control unit 16 for further processing emits.
  • the prefeed pump 12 is in a preferred embodiment driven by an electric motor 26 via a control line 27 is connected to the control unit 16. Furthermore can such an electrically driven pre-feed pump 12 can also be made adjustable in speed.
  • the prefeed pump 12 and the high pressure pump 14 can also are driven by the internal combustion engine BKM, whose Speeds then with a fixed gear ratio proportional to the speed of the internal combustion engine.
  • the prefeed pump 12 is preferably in the housing the high pressure pump 14 integrated.
  • the high-pressure pump 14 may be independent driven by the speed of the internal combustion engine BKM, for example by means of an electric motor.
  • FIG. 1 there is a reference numeral 28 Vehicle battery, which emits an on-board voltage VB and their positive pole to a terminal KL30 of an ignition switch 29 is guided, while the negative pole with the vehicle body connected is.
  • the output marked with terminal KL15 the ignition starter switch 29 is via an unspecified one Line with the control unit 16 and the control unit 18 connected.
  • At terminal KL 15 (connected plus after Vehicle battery) is live when the ignition is switched on is, i.e. the ignition switch 29 in the designated 1 Position is.
  • the output labeled terminal 50 the ignition starter switch 29 is via an unspecified one Line with a starter 30 (starter) of the internal combustion engine BKM connected.
  • the positive pole of the vehicle battery is also 28 led to the starter 30.
  • the ignition switch 29 In the position marked with position 2. Thereby the start-up process of the internal combustion engine BKM is initiated.
  • the pressure control valve PCV opened to the fuel from the high pressure accumulator drain.
  • the volume flow control valve VCV remains the shutdown of the internal combustion engine BKM during the run-on the control unit 16 briefly opened to the pump room to fill the high pressure pump 14 again. This eliminates the next time the BKM engine is started, the filling this dead space, resulting in faster operational readiness of the high pressure accumulator injection system.
  • the pressure control valve PCV open when de-energized, i.e. when switching off the internal combustion engine BKM it is switched off.
  • the volume flow control valve VCV is closed without current, so that after expiration the run-on time by switching off the power supply Fuel supply line 11 to the high pressure pump 14 is interrupted is. If the power supply fails, both take Valves in a safe state.
  • the hydraulic actuators volume flow control valve VCV and pressure control valve PCV immediately can be controlled.
  • the pressure control valve is used for quick pressure build-up PCV closed and the volume flow control valve VCV opened so that fuel is delivered to the high pressure pump 14 and can be compressed by it. requirement for this is a quick recognition of the starting process Internal combustion engine BKM to the hydraulic actuators in the controlled way early.
  • the diagram in FIG. 2 shows how the Starting time of the internal combustion engine BKM as early as possible can be recognized.
  • the signals for the Pressure control valve PCV and for the volume flow control valve VCV are in the order of bottom up, and the course of the battery voltage VB and a signal FLAG applied by a crankshaft sensor.
  • the ignition key is turned Ignition switched on, i.e. the battery voltage is at terminal KL15 VB on.
  • the battery voltage is at terminal KL15 VB on.
  • the current measured value at the time of sampling n becomes with the previous measured value at the time of sampling compared n-1. According to one, from the behavior of the Drivers of the vehicle dependent period of time will continue by turning the ignition key the starting process of the internal combustion engine BKM initiated at time t2.
  • the starter 30 At the KL30 terminal there is the battery voltage VB and thus the starter 30 energized.
  • starter 30 Due to the high current consumption of starter 30 is a significantly high drop in battery voltage VB measurable at time t2. So a measured value is significant (e.g. 20%) less than the previous measured value, then closed a desired starting process of the internal combustion engine and the components required for pressure build-up in the high-pressure accumulator injection system are relevant immediately driven. These components are usually the volume flow control valve VCV and the pressure control valve PCV. To the At time t2, the volume flow control valve VCV is thus opened and the pressure control valve PCV closed.
  • the evaluation of successive measured values at the times n, n-1 is advantageously done by forming the difference of the two measured values and comparison of the difference with one SW threshold.
  • This threshold SW is determined by tests experimental on the test bench for a given starter determined and is in a memory 31 of the control unit 16 filed.
  • a counter 32 is started.
  • the counter 32 reaches a predetermined end value without that the signal FLAG from the crankshaft sensor 33 rotates the crankshaft indicates (time t3 in Figure 2), the Hydraulic actuators volume flow control valve VCV and pressure control valve PCV again via appropriate signals for operation "Standstill of the internal combustion engine” driven because obvious no start in the specified period the internal combustion engine BKM.
  • VCV Hydraulic actuators volume flow control valve
  • PCV pressure control valve
  • pre-feed pump 12 and the high pressure pump 14 are not powered by the internal combustion engine BKM itself, but by means of separate electric motors, so these are also immediately after detection of the battery voltage dip at time t2 controlled immediately. This makes it even faster Realize pressure build-up in the high pressure accumulator injection system.

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  • 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)
  • Fuel-Injection Apparatus (AREA)

Abstract

Pour permettre une reconnaissance rapide du démarrage d'un moteur à combustion interne (BKM) équipé d'un système d'injection haute pression, la grandeur de système « tension de batterie » (VB) est évaluée. Lorsque l'allumage est déclenché, la tension de fonctionnement (VB) du véhicule équipé du moteur à combustion interne (BKM) est surveillée. L'apparition d'une chute de la tension de fonctionnement (VB), provoquée par l'excitation d'un démarreur (30) du moteur à combustion interne (BKM), est utilisée en tant que moment (t2) pour commander au moins un des organes de régulation hydraulique (soupape de régulation de débit VCV, soupape de régulation de pression PCV).

Claims (8)

  1. Procédé pour l'amélioration du démarrage d'un moteur à combustion interne (BKM) avec un système d'injection à réservoir à haute pression,
    dans lequel le carburant est acheminé au moyen d'une pompe de transfert (12) et d'une pompe à haute pression (14) vers un réservoir à haute pression (15), auquel des injecteurs (23) pour l'injection du carburant dans les cylindres du moteur à combustion interne (BKM) sont raccordés et,
    dans lequel la pression et le volume de transport de carburant sont ajustés au moyen d'un composant de réglage hydraulique (VCV, PCV),
       caractérisé en ce que
       lors de l'allumage, la tension de fonctionnement (VB) du véhicule équipé du moteur à combustion interne (BKM) est contrôlée et l'apparition d'une chute de tension de la tension de fonctionnement (VB) suite à l'excitation d'un démarreur (30) du moteur à combustion interne (BKM) est utilisée comme instant (t2) pour l'actionnement d'au moins l'un des composants de réglage hydraulique (VCV, PCV).
  2. Procédé selon la revendication 1, caractérisé en ce qu'en tant que composant de réglage hydraulique, une valve de réglage de débit volumétrique (VCV) disposée en amont de la pompe à haute pression (14) est actionnée à l'instant (t2) de telle façon qu'elle libère le flux de carburant en direction de la pompe à haute pression (14).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'en tant que composant de réglage hydraulique, une valve de réglage de pression (PCV) disposée en aval de la pompe à haute pression (14) est actionnée à l'instant (t2) de telle façon qu'elle arête le flux de carburant en direction du réservoir à haute pression (15).
  4. Procédé selon la revendication 1, caractérisé en ce que la pompe de transfert (12) est entraínée au moyen d'un moteur électrique (26) et celui-ci est actionné à l'instant (t2) de telle façon que la pompe de transfert (12) achemine du carburant en direction de la pompe à haute pression (14).
  5. Procédé selon la revendication 1 caractérisé en ce que la pompe à haute pression (14) est entraínée au moyen d'un moteur électrique et celui-ci est actionné à l'instant (t2) de telle façon que la pompe à haute pression (14) comprime le carburant.
  6. Procédé selon la revendication 1, caractérisé en ce que pour l'identification de la chute de tension de la tension de batterie (VB), cette dernière est mesurée dans un système à tranches de temps fixes, la différence entre les valeurs mesurées (n, n-1) successives dans le temps est constituée, cette différence est comparée avec une valeur seuil (SW) et on conclut à la chute de tension suite à l'excitation d'un démarreur (30), lorsque la différence dépasse la valeur seuil (SW).
  7. Procédé selon la revendication 6, caractérisé en ce que la valeur seuil (SW) est déterminée expérimentalement et est mémorisée dans une mémoire (31) d'une unité de commande (16).
  8. Procédé selon la revendication 1, caractérisé en ce qu'à l'instant (t2), un compteur (32) est démarré et lorsqu'il atteint une valeur prédéterminée, les composants de réglage hydrauliques (VCV, PCV) sont actionnés avec des signaux, caractéristiques de l'arrêt du moteur à combustion interne (BKM), quand le signal (FLAG) d'un capteur de vilebrequin (33) signale qu'il y a aucune rotation du vilebrequin.
EP00993428A 1999-12-15 2000-12-12 Procede pour ameliorer le demarrage d'un moteur a combustion interne equipe d'un systeme d'injection haute pression Expired - Lifetime EP1238190B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19960546 1999-12-15
DE19960546 1999-12-15
PCT/DE2000/004416 WO2001044638A2 (fr) 1999-12-15 2000-12-12 Procede pour ameliorer le demarrage d'un moteur a combustion interne equipe d'un systeme d'injection haute pression

Publications (2)

Publication Number Publication Date
EP1238190A2 EP1238190A2 (fr) 2002-09-11
EP1238190B1 true EP1238190B1 (fr) 2004-09-22

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EP00993428A Expired - Lifetime EP1238190B1 (fr) 1999-12-15 2000-12-12 Procede pour ameliorer le demarrage d'un moteur a combustion interne equipe d'un systeme d'injection haute pression

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EP (1) EP1238190B1 (fr)
DE (1) DE50007937D1 (fr)
WO (1) WO2001044638A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107299864A (zh) * 2016-04-14 2017-10-27 福特环球技术公司 用于减少微粒物质排放的系统和方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008021384B3 (de) * 2008-04-29 2009-11-26 Continental Aktiengesellschaft Überlagerte Druckregelung des Common-Rail-Systems

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Publication number Priority date Publication date Assignee Title
US5598817A (en) 1993-09-10 1997-02-04 Mitsubishi Jidosha Kogyo Kabushiki Kaisha Fuel feeding system for internal combustion engine
JP3133586B2 (ja) * 1993-11-18 2001-02-13 富士重工業株式会社 高圧燃料噴射式エンジンの燃料圧力制御装置
DE4425986B4 (de) * 1994-07-22 2004-04-08 Robert Bosch Gmbh Verfahren und Vorrichtung zur Steuerung einer Brennkraftmaschine
DE19547877A1 (de) 1995-12-21 1997-06-26 Bosch Gmbh Robert Kraftstoffhochdruckspeichersystem für ein in Brennkraftmaschinen eingesetztes Kraftstoffeinspritzsystem
JP3815512B2 (ja) * 1996-08-23 2006-08-30 株式会社デンソー エンジン用蓄圧式燃料供給装置の制御方法
JP3612175B2 (ja) * 1997-07-15 2005-01-19 株式会社日立製作所 筒内噴射エンジンの燃料圧力制御装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107299864A (zh) * 2016-04-14 2017-10-27 福特环球技术公司 用于减少微粒物质排放的系统和方法
CN107299864B (zh) * 2016-04-14 2022-05-13 福特环球技术公司 用于减少微粒物质排放的系统和方法

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Publication number Publication date
EP1238190A2 (fr) 2002-09-11
WO2001044638A2 (fr) 2001-06-21
DE50007937D1 (de) 2004-10-28
WO2001044638A3 (fr) 2001-12-27

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