WO2009083470A1 - Procédé pour faire fonctionner un moteur à combustion interne - Google Patents

Procédé pour faire fonctionner un moteur à combustion interne Download PDF

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Publication number
WO2009083470A1
WO2009083470A1 PCT/EP2008/067845 EP2008067845W WO2009083470A1 WO 2009083470 A1 WO2009083470 A1 WO 2009083470A1 EP 2008067845 W EP2008067845 W EP 2008067845W WO 2009083470 A1 WO2009083470 A1 WO 2009083470A1
Authority
WO
WIPO (PCT)
Prior art keywords
internal combustion
combustion engine
combustion chamber
fuel
crankshaft
Prior art date
Application number
PCT/EP2008/067845
Other languages
German (de)
English (en)
Inventor
Claus Linsenmaier
Ruediger Weiss
Andreas Schmidt
Tobias Leutwein
Manfred Dietrich
Elias Calva
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2009083470A1 publication Critical patent/WO2009083470A1/fr

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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
    • F02D41/24—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
    • F02D41/263—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the program execution being modifiable by physical parameters
    • 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
    • F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
    • F02D2041/0095—Synchronisation of the cylinders during engine shutdown
    • 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
    • F02D2250/12—Timing of calculation, i.e. specific timing aspects when calculation or updating of engine parameter is performed

Definitions

  • the present invention relates to a method for operating an internal combustion engine, wherein during operation of the internal combustion engine in a normal operation, an operation for combustion of fuel in a combustion chamber of the internal combustion engine is performed periodically at a predetermined angular position of a crankshaft of the internal combustion engine. Furthermore, the present invention relates to a device which is set up for carrying out such a method and to a computer program for carrying out all the steps of such a method.
  • crankshaft-angle synchronization is established by placing a signal on the crankshaft.
  • shaft fixed gear is observed with a tooth gap. A passing of the tooth gap provides information about the angular position of the crankshaft.
  • a disadvantage of the described method is that it first has to wait until a synchronization has taken place, which in the unfavorable case requires almost a full revolution of the crankshaft before a synchronization can be performed. Furthermore, it is disadvantageous that the period between the synchronization and a first
  • Ignition of a mixture in a combustion chamber is additionally extended by the fact that the order described above must be observed.
  • An object of the invention is to improve the known from the prior art devices and methods, wherein in particular a method and an apparatus are to be given, which allow a faster starting an internal combustion engine, in particular an internal combustion engine with gasoline direct injection under high pressure.
  • the operation is not necessarily tied to an angular position, but may also be triggered by the passage of a period of time or by comparable events. It should be noted that during the starting process, the internal combustion engine is towed, wherein the speed of the internal combustion engine in the starting process significantly below a
  • Speed of the internal combustion engine in normal operation is. If it is further taken into account that the normally determined angular positions for the operation are usually selected such that an operation is always ensured even when the internal combustion engine is operating at the maximum rotational speed, it becomes clear that a multiple of time is available during towing perform comparable calculations during a power stroke or one or two revolutions of the crankshaft.
  • the method is particularly suitable for internal combustion engines with gasoline direct injection and in particular for internal combustion engines with a high-pressure gasoline direct injection from a high-pressure accumulator.
  • EP 1 283 343 A2 for the usually defined angular positions for operations, which are also referred to as "tasks.”
  • This application also describes how synchronization with an angular identification mark, for example a tooth gap of a toothed wheel,
  • the advantage of the invention is that synchronization by detecting, for example, a missing tooth gap of a gear fixed to the crankshaft is no longer decisive for the release of the injection and ignition.
  • a known Abstellposition of the internal combustion engine is used to determine a first to be fired in the startup combustion chamber, wherein the operation for combustion in the first to be fired combustion chamber is performed regardless of the fixed angular position.
  • a control device or a crankshaft which is known after a shutdown of the internal combustion engine in which position, ie angular position, the crankshaft of the internal combustion engine, offer the advantage that even before a synchronization of a control device, the angular position of the crankshaft can be determined, which Combustion chamber is suitable for a first combustion of fuel.
  • the parking position is also referred to as the rest position and usually denotes the angular position of the internal combustion engine immediately before towing.
  • the first combustion chamber to be fired is selected from a plurality of combustion chambers as a function of the parking position of the internal combustion engine.
  • the first combustion chamber to be fired is selected from a plurality of combustion chambers as a function of the parking position of the internal combustion engine.
  • it is generally after switching off the internal combustion engine that due to the position of the crankshaft, some pistons of combustion chambers are in a more favorable position for a subsequent fast high-pressure start than others.
  • one of the most suitable combustion chambers or the most suitable combustion chamber is selected for an early first ignition of fuel during the starting process of the internal combustion engine.
  • a plurality of combustion chambers are selected which, in the parking position of the internal combustion engine, have sufficient charge for a first combustion in the starting process.
  • sufficient filling in this case is meant a sufficient air filling, d. H.
  • a combustion chamber is selected which has a piston position as close as possible to the bottom dead center, so that there is a large amount of air in the combustion chamber.
  • the size of the filling is decisive for whether one
  • Burning enough torque is built up to initiate the startup or continue. This offers the advantage that the ignition can be released as early as possible.
  • the first combustion chamber to be fired is determined prior to the start of the starting process of the internal combustion engine. In this case, before the start of the starting process, preferably before the towing of the internal combustion engine.
  • the combustion chamber can be determined, which is best suited as the first combustion chamber to be fired in a subsequent starting process. In such a case, it is advantageous to monitor whether the crankshaft of the internal combustion engine is moved during the Abstellzeitraums, in such a case to switch to a conventional starting operation.
  • it is preferable to switch to a conventional starting procedure if it is determined that the internal combustion engine is not in the stored parking position.
  • the first combustion chamber to be fired is one which is located in the exhaust chamber. in a compression tract or immediately before a compression tract.
  • the operation is performed independently of a synchronization of a control device by detecting an angle mark of the crankshaft.
  • This offers the advantage that it is not necessary to wait for a synchronization and the starting process is accelerated.
  • the operation is performed before synchronization of a control means follows by detecting an angular mark of the crankshaft. This means that the operation is started anyway, regardless of whether synchronization has already taken place. This does not rule out that, depending on the parking position of the internal combustion engine but a synchronization takes place before the calculation is started, for example, if the parking position of the type is that immediately after towing the angle mark is detected.
  • an angle mark is used to denote, for example, a tooth gap of a toothed wheel which is fastened to the crankshaft.
  • a parameter is calculated during the operation.
  • This parameter is advantageously an air filling quantity of the combustion chamber, a fuel quantity for the combustion chamber
  • the air filling quantity can be calculated, for example, from the angular position of the crankshaft by closing the current volume of the combustion chamber from the kinematic relationship between the crankshaft and the piston.
  • the amount of fuel can be provided for a stratified injection. From the above-mentioned European application, various operations are known which must or can be performed to perform an injection. For details, refer to the above mentioned European application.
  • a plurality of operations for combustion of fuel in a combustion chamber of the internal combustion engine are made periodically at different, fixed angular positions, wherein at least two of the operations are performed independently of the respectively fixed angular positions during the starting process. It can also be provided that operations in a different order than usually carried out, for example, because in the startup dependencies need not be considered, which must be considered in general operation. Furthermore, it is possible to perform operations in parallel.
  • Another object of the invention is a device, in particular a control device or an internal combustion engine, which are adapted to carry out a method in one of the advantageous embodiments described above.
  • a computer program with program code for carrying out all the steps of such a method when the program is executed in a computer forms a further subject of the invention.
  • FIG. 1 shows a sketch of an internal combustion engine in which a method according to the invention can be carried out
  • FIG. 2 is a schematic illustration of the flow of operations during a starting operation of the internal combustion engine of FIG. 1; FIG. and
  • FIG. 3 shows a schematic representation of the sequence of operations during a starting process according to the invention of the internal combustion engine of FIG. 1.
  • FIG. 1 schematically shows an internal combustion engine 10. It comprises an engine block with a plurality of cylinders 12, of which only one is shown in FIG.
  • a combustion chamber 14 is present, which is partially limited by a piston 16.
  • This is connected via a connecting rod 18 with a crankshaft 20.
  • a gear 22 is fixed on the crankshaft 20, in turn, a gear 22 is fixed.
  • This carries on its circumference a total of 58 teeth (without reference numerals). There are no teeth over a perimeter extension corresponding to two teeth.
  • the gap 24 thus formed on the circumference of the gear 22 is detected by an inductive sensor 26.
  • the inductive sensor 26 is arranged adjacent to the toothed wheel 22 and is designed so that it can detect the passage 24 of the gap 24 when the toothed wheel 22 rotates.
  • the gap 24 may also be referred to as an angle mark 24, as it indicates a certain angular position of the crankshaft 20.
  • Combustion air is supplied to the combustion chamber 14 through an inlet pipe 28 and an inlet valve 30.
  • the combustion exhaust gases are discharged from the combustion chamber 14 via an exhaust valve 32 and an exhaust pipe 34.
  • a throttle valve 36 allows the adjustment of the amount of air that passes through the inlet pipe 28 into the combustion chamber 14.
  • the movement of the throttle valve 36 is performed by a servo motor 38.
  • the reaching into the combustion chamber 14 air quantity is measured by a hot film sensor 40 ("HFM sensor").
  • HFM sensor hot film sensor
  • a catalyst 42 is disposed, and the mixture composition of the exhaust gas is from a
  • Fuel is supplied to the combustion chamber 14 from a fuel system 46 shown only symbolically in FIG. 1.
  • a fuel system 46 may include a fuel tank, an electric prefeed pump, and a main mechanical pump. Furthermore, this includes
  • Fuel system 46 a referred to as "rail" or high-pressure accumulator fuel rail in which the fuel is stored under high pressure.
  • an injection valve 48 is connected, which injects the fuel directly into the combustion chamber 14 of the internal combustion engine 10.
  • the ignition of the present in the combustion chamber 14 air-fuel mixture is effected by a spark plug 50, which is supplied by an ignition system 52 with the required energy.
  • a knock sensor 54 attached to the cylinder 12 of the internal combustion engine 10 detects a knocking combustion possibly taking place in the combustion chamber 14.
  • the operation of the internal combustion engine 10 is controlled by a control device 56.
  • This is the output side connected to the ignition system 52, the injection valve 48, and the servo motor 38 of the throttle valve 36, and the input side, the controller 56 with the knock sensor 54, the lambda sensor 44, the inductive sensor 26 and the HFM sensor 40 is connected.
  • the fuel is injected into the combustion chamber 14 directly from the injection valve 48.
  • the internal combustion engine 10 can be operated in different operating modes, depending on, for example, speed and torque. For example, it is possible to inject fuel into the combustion chamber 14 during the intake stroke, that is to say during a period in which the intake valve 30 is open. In this case, the fuel together with the air in the combustion chamber 14 forms a substantially homogeneous fuel-air mixture. Such injection is referred to as “homogeneous injection", the corresponding mode as "homogeneous”.
  • a controller 56 The necessary in an operating mode operations, calculations and the generation of corresponding control signals are processed by a controller 56 within a processing grid.
  • a controller 56 There are time-synchronous processing grids in which certain operations are performed at certain constant time intervals. Other operations are performed in a processing grid synchronous with the rotational angle of the crankshaft 20. These other operations are also referred to herein as parameter calculations.
  • the current angular position of the crankshaft 20 is detected by the inductive sensor 26 via the detection of the gap 24 and the detection of the following teeth on the gear 22.
  • a Hall sensor could be used instead of an inductive sensor.
  • the angular position of the crankshaft 20 is thus known to the control device 56. It is usually in "degree before top dead center ignition” (vZOT) of the piston 16.
  • the intake valve 30 and the exhaust valve 32 are mechanically rigidly connected to the crankshaft 20 via the camshaft (not shown).
  • variably controllable valves from the prior art are known.
  • the gap 24 on the gear 22 defines the beginning of a first and a second, to the rotation angle of the crankshaft 20 synchronous processing grid. These are referred to in Figs. 2 and 3 as "SYNCHROI" and "SYNCHRO2".
  • FIG. 2 schematically shows the sequence of a conventional high-pressure start.
  • FIG. 2 refers to the internal combustion engine shown in FIG. 1 and describes an operating method for this internal combustion engine.
  • required operating variables are processed in operations. These are the first operation 61 and the second operation 62, which are exemplified herein. in the
  • Operation can be performed more than just these two operations 61 and 62.
  • operation 61 a parameter calculation is performed, wherein the filling of the combustion chamber is calculated.
  • the operation 61 is clocked by "SYNCHRO1.”
  • operation 62 clocked by "SYNCHRO2"
  • the fuel amount for a stratified injection, the ignition angle and the ignition energy are calculated.
  • a start request 65 is first detected by the control device. Subsequently, the control device waits until a synchronization is present, that is to say when the engine is started. H. until the gap 24 is first detected on the gear. This time span will be in the
  • the reference numeral 67 designates a time period which designates a period of time from another start request at another rest position of the internal combustion engine.
  • the first combustion chamber After synchronization, it is determined in which combustion chamber the first combustion should take place. Subsequently, during a period of time 68, the above-mentioned operations 61 and 62 are carried out for this combustion chamber. At the end of the period 68, the ignition 70 takes place.
  • the first fired combustion chamber is generally not the combustion chamber, which after switching off the engine, d. H. in the rest position, in the compression stroke, but another. This usually requires a longer startup time compared to the inventive method described below.
  • FIG. 3 shows the sequence of a method according to the invention.
  • the same reference numerals denote the same processes as in FIG. 2.
  • One of the differences compared to the method of Figure 2 is that during a startup process, a stored or otherwise determined rest position of the internal combustion engine is used.
  • the rest position denotes the angular position of the crankshaft before the start of towing.
  • a storage can take place, for example, by storing the rest position in a memory of the control device during a previous run-out of the internal combustion engine and retrieving it before or during a subsequent start-up procedure.
  • a determination of the first combustion chamber to be fired takes place spontaneously on a start request 65. It is determined which of the combustion chambers is in a compression stroke and a sufficient air charge for a suitable
  • a first ignition 70 takes place at the ignition angle position calculated therefor.
  • the elapsed time since the start request to the first ignition time is denoted by 71. It can be clearly seen that a faster high-pressure start is possible with the method according to the invention than with the conventional method.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

L'invention concerne un procédé pour faire fonctionner un moteur à combustion interne (10) selon lequel, en fonctionnement normal du moteur à combustion interne (10), une opération pour une combustion du carburant dans une chambre de combustion (14) du moteur à combustion interne (10) est exécutée périodiquement pour une position angulaire fixée d'un vilebrequin (20) du moteur à combustion interne (10). Le procédé selon l'invention est caractérisé en ce que, pendant une phase de démarrage du moteur à combustion interne (10), l'opération est exécutée indépendamment de la position angulaire fixée.
PCT/EP2008/067845 2007-12-28 2008-12-18 Procédé pour faire fonctionner un moteur à combustion interne WO2009083470A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710063101 DE102007063101A1 (de) 2007-12-28 2007-12-28 Verfahren zum Betreiben einer Brennkraftmaschine
DE102007063101.6 2007-12-28

Publications (1)

Publication Number Publication Date
WO2009083470A1 true WO2009083470A1 (fr) 2009-07-09

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PCT/EP2008/067845 WO2009083470A1 (fr) 2007-12-28 2008-12-18 Procédé pour faire fonctionner un moteur à combustion interne

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WO (1) WO2009083470A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4304163A1 (de) * 1993-02-12 1994-08-25 Bosch Gmbh Robert Einrichtung zur Steuerung der Kraftstoffeinspritzung bei einer Brennkraftmaschine
EP1283343A2 (fr) * 2001-08-10 2003-02-12 Robert Bosch Gmbh Procédé, programme informatique et dispositif de commande et/ou de réglage du fonctionnement d'un moteur à combustion interne
WO2006043679A1 (fr) * 2004-10-22 2006-04-27 Toyota Jidosha Kabushiki Kaisha Dispositif et procede d'arret de moteur
WO2008080817A1 (fr) * 2006-12-27 2008-07-10 Robert Bosch Gmbh Procédé de démarrage d'un moteur à combustion interne

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4304163A1 (de) * 1993-02-12 1994-08-25 Bosch Gmbh Robert Einrichtung zur Steuerung der Kraftstoffeinspritzung bei einer Brennkraftmaschine
EP1283343A2 (fr) * 2001-08-10 2003-02-12 Robert Bosch Gmbh Procédé, programme informatique et dispositif de commande et/ou de réglage du fonctionnement d'un moteur à combustion interne
WO2006043679A1 (fr) * 2004-10-22 2006-04-27 Toyota Jidosha Kabushiki Kaisha Dispositif et procede d'arret de moteur
WO2008080817A1 (fr) * 2006-12-27 2008-07-10 Robert Bosch Gmbh Procédé de démarrage d'un moteur à combustion interne

Also Published As

Publication number Publication date
DE102007063101A1 (de) 2009-07-02

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