EP2906801A1 - Procédé d'ajustement des caractéristiques d'injection des injecteurs dans un moteur à combustion interne, dispositif de commande de moteur et système d'ajustement des caractéristiques d'injection - Google Patents

Procédé d'ajustement des caractéristiques d'injection des injecteurs dans un moteur à combustion interne, dispositif de commande de moteur et système d'ajustement des caractéristiques d'injection

Info

Publication number
EP2906801A1
EP2906801A1 EP13773618.7A EP13773618A EP2906801A1 EP 2906801 A1 EP2906801 A1 EP 2906801A1 EP 13773618 A EP13773618 A EP 13773618A EP 2906801 A1 EP2906801 A1 EP 2906801A1
Authority
EP
European Patent Office
Prior art keywords
injectors
injector
internal combustion
combustion engine
crank angle
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.)
Withdrawn
Application number
EP13773618.7A
Other languages
German (de)
English (en)
Inventor
Jörg REMELE
Aron Toth
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.)
Rolls Royce Solutions GmbH
Original Assignee
MTU Friedrichshafen 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 MTU Friedrichshafen GmbH filed Critical MTU Friedrichshafen GmbH
Publication of EP2906801A1 publication Critical patent/EP2906801A1/fr
Withdrawn legal-status Critical Current

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
    • F02D41/24—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
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or air-fuel ratio
    • 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
    • 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
    • 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
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2438—Active learning methods
    • 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
    • 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
    • F02M65/001—Measuring fuel delivery of a fuel injector
    • 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
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/008—Controlling each cylinder individually
    • F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
    • 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
    • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
    • F02D41/2425—Particular ways of programming the data
    • F02D41/2429—Methods of calibrating or learning
    • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
    • F02D41/2464—Characteristics of actuators
    • F02D41/2467—Characteristics of actuators for injectors

Definitions

  • German Offenlegungsschrift DE 100 55 192 A1 discloses a method for concentricity control for diesel engines, with the aid of which correction factors for
  • the invention has for its object to provide a method which allows safe and efficient injector equalization, so that a series dispersion can be compensated.
  • the process should be simple and inexpensive and in particular during operation of the internal combustion engine to be feasible.
  • the object of the invention is also to provide an engine control unit, by means of which the method is feasible. It is another object of the invention to provide a system with which a
  • the object is achieved by providing a method with the steps of claim 1.
  • a first injector is switched off.
  • a crank angle signal of the internal combustion engine is detected and transformed into the frequency domain by means of discrete Fourier transformation. From the discreet
  • Crankshaft sensor provided, and it is also an engine control unit includes.
  • engine control unit For carrying out the method, therefore, only components are used which are present in the internal combustion engine anyway. Thus, there are no additional sensor, device and / or cabling costs for carrying out the method.
  • the algorithm for performing the method is preferably implemented in the engine control unit.
  • a method is also preferred which is characterized in that, for each injector, a difference amount is calculated as the difference of the amount associated with the injector to an amount detected and stored when all of the injectors are turned on, the amounts assigned to the individual injectors Difference between the averaging and the correction.
  • Averaging then refers to the difference amounts calculated in this way, and the correction of the control of the injectors is carried out correspondingly on the basis of the deviations of the difference amounts to an average formed therefrom.
  • Difference amounts are typically signed, ie no amounts in the strict mathematical sense.
  • the amount used as the reference point for the amounts assigned to the individual injectors which is measured in the normally running internal combustion engine, is recorded and stored once, for example after a start of the internal combustion engine. It is also possible to enter this amount in
  • the stored in a memory value replaced by a respective current, newly detected value.
  • the method is preferably performed not on the basis of the absolute values, but rather on the basis of the difference amounts relative to the amount of the harmonics of the 0.5th order as the reference point when the engine is running normally, if this amount, ie Reference point, at least to a significant extent different from zero. If this is not the case, ie if the amount is zero or at least close to zero, the method can be carried out on the basis of the absolute values recorded and stored for the injectors without difference. However, it is readily possible to carry out the method on the basis of the difference amounts in this case, too, in particular because the result does not differ from the method without subtraction if the amount is zero in the case of a normally running engine. Also, the difference amounts are after all "amounts" in the sense of claim 1.
  • a method is also preferred which is characterized in that at least two iterations of the method are performed.
  • the method is preferably iterated as long as it is carried out sequentially in succession until the
  • Deviation of each injector from the average value formed for all injectors does not exceed the predetermined threshold.
  • the method is therefore preferably repeated until the deviation from the mean value for all injectors is less than the predetermined threshold value.
  • a scope relevant to the practice can be determined by setting the predetermined threshold.
  • a method is also preferred, which is characterized in that the
  • Control of the injectors is corrected by a Bestromungsdauer adapted for them.
  • the energization duration of a single injector is changed so that the desired correction of the injected fuel quantity is achieved.
  • a method is also preferred, which is characterized in that the
  • i is a running variable which runs over the individual injectors and whose value in each case indicates a currently considered injector.
  • ABD [i] means the
  • Bestromungsdauerdifferenz which is to be counted on the current Bestromungsdauer for the injector i. It means to add that the - positive or negative - Bestromungsdauerdifferenz is added to the currently available Bestromungsdauer.
  • MW is the mean derived from the individual injectors
  • Difference amounts of the amounts of the harmonics of the 0.5th order to that for the normal running engine, so when all the injectors are turned on, detected and stored amount is calculated.
  • ABetrag [i] is equal to the difference calculated for injector i.
  • the mean value MW is so over all injectors the individual difference amounts ABetrag [i] formed mean value.
  • K is a constant which is chosen so that a suitable correction of the energization time is possible.
  • Combustion engine is then the corresponding value for the constant K to
  • the method is preferably carried out at an operating point of the internal combustion engine by operating under load or at idle.
  • the method is readily feasible in such operating points. It turns out that in large engines, such as engines, which
  • the object is also achieved by providing an engine control unit for an internal combustion engine having the features of claim 9.
  • the engine control unit is characterized in that it is designed to carry out a method according to one of the previously described embodiments. This means in particular that an algorithm for implementing the method is implemented in the engine control unit.
  • a connection of a crankshaft sensor to the engine control unit is preferably provided, so that it can detect a crank angle signal and process it in the sense of the method.
  • preferred are on the
  • Internal combustion engine provided so that they can be energized by the engine control unit and off individually and can be turned on.
  • the object is also achieved by providing a system for equalizing an injection behavior of injectors having the features of claim 10.
  • the system is used in particular for carrying out a method according to one of the previously described embodiments.
  • the system comprises a switching means, which is designed so that with its help, the individual injectors are selectively switched off and on. It further comprises a detection means, which is designed so that a crank angle signal of the internal combustion engine can be detected. That's it
  • Detection means preferably designed as a crankshaft sensor.
  • the detection means is operatively connected to a transformation agent such that the one of the
  • Detected detecting crank angle signal is forwarded to the transformation means.
  • the transformation means is designed so that with its help the
  • Crank angle signal in the frequency domain by means of discrete Fourier transform is transformable.
  • a memory means is provided which is arranged so that an amount of the harmonics of the 0.5th order of the Fourier transform of the Crank angle signal can be detected and stored with his help.
  • the transformation means and the storage means are preferably correspondingly
  • the storage means is also adapted to allocate the detected and stored amount to an injector disabled upon detection and storage thereof.
  • an averaging element is provided, which is designed so that with its help a calculation of an average value of the amounts stored in the storage means is possible over all injectors. It is also provided a correction means which is designed so that with his help a
  • Average is calculable, wherein a control of the injector based on the
  • the system comprises an engine control unit, in particular a
  • a system is preferred in which - preferably also of the
  • Engine control unit comprises - a difference forming means is provided, by which for each injector a difference amount as the difference of an injector associated amount to an amount that is detected and stored when all injectors are turned on, is calculable.
  • a detection and storage means is provided for the amount which is detected and stored when the engine is running normally.
  • the system is preferably designed such that the difference amounts of the averaging and the correction assigned to the individual injectors are used.
  • system is preferably designed so that the embodiments described as being preferred in the context of the method can be carried out by the system.
  • the system is designed so that
  • Bestromungsdauerdifferenzen which are calculated according to the previously described equation (1), wherein preferably at the same time the previously described condition (2) is maintainable to ensure that the total power of the internal combustion engine is not changed by the injector equalization.
  • corresponding means for carrying out the energization duration adaptation according to the said equation (1) and under said condition (2) are preferably provided in the engine control unit.
  • a run variable i is also defined and initialized, preferably with the value 0 assigned to it.
  • the current value of the running variable i is compared with the number of cylinders determined in step 3.
  • the run variable is first initialized with the value 0, so that the value 0 is also assigned to the run variable i for the first injector for which the method is carried out. It is readily apparent how the procedure would be changed if the
  • Running variable with another value would be initialized with the value 1.
  • step 5 when the running variable i is initialized with the value 0, it is checked whether the value of the run variable is smaller than the number of cylinders determined in step 3. If so, the process proceeds to a step 7 where the injector associated with the current value of the run variable i is turned off. Subsequently, in a step 9, an amount or difference of the harmonics of the 0.5th order of the Fourier transform of the crank angle signal is detected and stored and assigned to the switched-off injector.
  • a step 11 the value of the running variable i is increased by one; at the same time the switched-off injector is switched on again. The method then jumps back to the query 5, in which it is checked again whether the now present, the present value of
  • Running variable i is even smaller than the number of cylinders. It turns out that in this way a loop 13 is traversed so often until for each injector in step 9 sequentially one after the other an amount or difference was detected.
  • the last injector is assigned a value of the running variable i, which corresponds to the number of cylinders reduced by one. Therefore, after detecting the amount or difference amount for the last injector in step 9, the value of the running variable is increased to a value corresponding to the number of cylinders. If this is found in the query 5, the method proceeds to a step 15.
  • the value of the run variable i is initialized in this case, in particular set to 0 in the embodiment of the method discussed here.
  • an average value is formed from the detected and stored amounts or difference amounts for the individual injectors.
  • the method then enters a query 19, in which it is again checked whether the current value of the run variable i is smaller than the number of cylinders determined in step 3. If this is the case, the method proceeds to a step 21, in which a correction of the control of the injector, to which the current value of the running variable i is assigned, is carried out.
  • a correction of the control of the injector to which the current value of the running variable i is assigned, is carried out.
  • This preferably takes place on the basis of a difference amount assigned to the solely switched off injector to an amount determined for the normal operation of the internal combustion engine, as well as on the basis of an average value of the difference amounts for the individual injectors.
  • a difference amount assigned to the solely switched off injector to an amount determined for the normal operation of the internal combustion engine, as well as on the basis of an average value of the difference amounts for the individual injectors.
  • a difference amount assigned to the solely switched off injector to an amount determined for the normal operation of the internal combustion engine, as well as
  • step 27 If the value of the running variable i in the query 19 is therefore identical to the number of cylinders determined in step 3 for the first time, the method ends in a step 27.
  • the correction of the energization duration in the step 21 for the cylinder, to which the current value of the running variable i is assigned, is preferably carried out only if a deviation of the amount or difference amount from the mean value
  • Pre-injection and / or post-injection can be displayed.

Landscapes

  • 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 d'ajustement des caractéristiques des injecteurs dans un moteur à combustion interne, comprenant les étapes suivantes : arrêt d'un injecteur, détection d'un signal d'angle de vilebrequin du moteur à combustion interne, transformation du signal d'angle de vilebrequin dans le domaine fréquentiel au moyen d'une transformée de Fourier discrète, détection et mémorisation de la valeur de l'harmonique du 0,5ème ordre de la transformée de Fourier du signal d'angle de vilebrequin, et attribution de cette valeur à l'injecteur arrêté, mise en marche de l'injecteur arrêté, exécution des étapes ci-dessus pour tous les injecteurs du moteur à combustion interne successivement, calcul d'une moyenne des valeurs mémorisées pour tous les injecteurs, et correction de la commande des injecteurs en fonction d'un l'écart de la valeur attribuée à un injecteur à corriger par rapport à la moyenne.
EP13773618.7A 2012-10-10 2013-10-04 Procédé d'ajustement des caractéristiques d'injection des injecteurs dans un moteur à combustion interne, dispositif de commande de moteur et système d'ajustement des caractéristiques d'injection Withdrawn EP2906801A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012020489.2A DE102012020489B4 (de) 2012-10-10 2012-10-10 Verfahren zur Angleichung eines Einspritzverhaltens von Injektoren in einem Verbrennungsmotor, Motorsteuergerät und System zur Angleichung eines Einspritzverhaltens
PCT/EP2013/002995 WO2014056595A1 (fr) 2012-10-10 2013-10-04 Procédé d'ajustement des caractéristiques d'injection des injecteurs dans un moteur à combustion interne, dispositif de commande de moteur et système d'ajustement des caractéristiques d'injection

Publications (1)

Publication Number Publication Date
EP2906801A1 true EP2906801A1 (fr) 2015-08-19

Family

ID=49304886

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13773618.7A Withdrawn EP2906801A1 (fr) 2012-10-10 2013-10-04 Procédé d'ajustement des caractéristiques d'injection des injecteurs dans un moteur à combustion interne, dispositif de commande de moteur et système d'ajustement des caractéristiques d'injection

Country Status (5)

Country Link
US (1) US9664134B2 (fr)
EP (1) EP2906801A1 (fr)
CN (1) CN104854331B (fr)
DE (1) DE102012020489B4 (fr)
WO (1) WO2014056595A1 (fr)

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CN116163845B (zh) * 2023-04-20 2023-07-18 潍柴动力股份有限公司 一种发动机的停缸控制方法、装置和发动机
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Also Published As

Publication number Publication date
DE102012020489B4 (de) 2014-04-30
CN104854331B (zh) 2017-09-05
HK1213618A1 (zh) 2016-07-08
US9664134B2 (en) 2017-05-30
US20150211430A1 (en) 2015-07-30
CN104854331A (zh) 2015-08-19
DE102012020489A1 (de) 2014-04-10
WO2014056595A1 (fr) 2014-04-17

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