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
  • F02D41/2406—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
  • F02D41/2432—Methods of calibration
• • 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
  • F02D41/2441—Methods of calibrating or learning characterised by the learning conditions
  • F02D41/2445—Methods of calibrating or learning characterised by the learning conditions characterised by a plurality of learning conditions or ranges
• • 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

• the present invention relates to a method of coordinating a number of injector calibration operations.
• Fuel injection pads allow the metering of the fuel required for combustion in an internal combustion engine by means of one or more injectors.
• gasoline direct injection and common rail injection the fuel is injected directly into the combustion chamber.
• the metered amount of fuel is of crucial importance.
• injector calibration methods are used in which a connection between activation duration and injection quantity is produced individually for each injector in order to be able to use it for future injections.
• An injector calibration method is presented in DE 10 2005 051 701 A1. Such methods are also described in DE 10 2009 003 212 A1 and DE 10 2009 003 211 A1. It is desirable to further improve injector calibration.
• the invention is based on the measure of performing a number of injector calibration operations in a priority-dependent order. Effectively, operating points and / or drive times are prioritized and handled in order of priority.
• the advantage of the proposed method lies in the fact that in particular those operating points or drive periods, which - bpsw. for emission or running rest reasons - have a particular relevance to the vehicle operation, early measured or calibrated.
• the present invention can be used in any combustion process - whether port injection or direct injection - and leads by early calibration of prioritized injector calibration operations to improved operation of the internal combustion engine in cases where these injections are then requested during operation.
• the improvement can be shown, for example, in an exhaust gas and / or noise emission reduction.
• Today's methods only measure operating points or activation periods, however, if they result randomly. A concrete prioritization does not take place.
• the prioritization is selected so that emission is reduced, smoothness is increased, durability and / or life is increased, and / or wear is reduced.
• cross influences are becoming increasingly important for the actual injector behavior.
• temperature of the internal combustion engine injection pressure, aging effects or pauses between two activations may be mentioned.
• these cross-influences are mapped in functionality, i. the injector calibration is performed depending on the operating point.
• An arithmetic unit according to the invention e.g. a control device of a motor vehicle is, in particular programmatically, configured to perform a method according to the invention.
• Suitable data carriers for the provision of the computer program are, in particular, floppy disks, hard disks, flash memories, EEPROMs, CD-ROMs, DVDs and the like. It is also possible to download a program via computer networks (Internet, intranet, etc.). Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawings.
• Figure 1 shows a highly schematic representation of an internal combustion engine with a fuel injection system and a plurality of injectors.
• FIG. 2 shows a flowchart for illustrating an embodiment of the invention.
• FIG. 1 shows an internal combustion engine 10 which comprises a fuel reservoir 12, from which fuel is conveyed into a high-pressure fuel line 16 by means of a delivery system 14.
• the high pressure line 16 is formed for example as a common rail.
• the high-pressure line 16 is connected to injectors 18, which make it possible to inject fuel directly into the injectors 18 each associated combustion chambers 20.
• the operation of the internal combustion engine 10 and in particular the fuel injection system, which is formed for example by the conveyor system 14, the high pressure line 16 and the injectors 18 is controlled by a computing unit, here a controller 22.
• the controller 22 allows the detection of input values and the provision of output values or the actuation of actuators, in particular the control of the injectors 18th
• the control unit 22 is program-technically designed to carry out a method according to the invention. For this purpose, for example, in the
• Control unit uses a memory device are stored in the calibrated injection operations with associated priority values. These can be stored, for example, before the delivery of the internal combustion engine. Alternatively or additionally, the data may be stored in the event of scheduled maintenance, e.g. Workshop visits, customer service, etc., to be renewed.
• scheduled maintenance e.g. Workshop visits, customer service, etc.
• the invention begins at a step 200 where certain priority values are assigned to particular injector calibration operations to determine an order of calibrations to be performed.
• the order of the calibrations to be performed is expediently to be determined within the scope of the application and may be e.g. based on findings of the combustion process development.
• Preferably, particularly critical operating states of the injector are calibrated early with regard to the effects of emissions.
• the step 200 usually takes place at the manufacturer or in a workshop.
• a step 201 according to the prioritization, specific operating points and / or activation periods, which are assigned to the prioritized injector calibration processes, are targeted during the operation of the internal combustion engine.
• the control unit 22 controls the internal combustion engine 10 accordingly.
• Katforming operation heating of the catalytic converter after the cold start
• these short injections advantageously at an operating point characterizing the cold start - are assigned higher priority values than long injection periods. tions.
• the Katching operation uses a certain pressure.
• the injector calibration is expediently controlled by a coordinator (filed as a program part in the control unit).
• the role of the coordinator is to monitor the switch-on conditions for the functions, to trigger the calibration and to release correction values.
• the coordinator is adapted so that it proceeds depending on priority.
• a step 202 the calibration process is then performed.
• known methods are available, as described, for example, in the introduction.

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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=45315746

Family Applications (1)

Country Status (4)

Family Cites Families (16)

• 2010
  • 2010-12-17 DE DE102010063344.5A patent/DE102010063344B4/de active Active
• 2011
  • 2011-11-29 WO PCT/EP2011/071253 patent/WO2012079968A1/de active Application Filing
  • 2011-11-29 CN CN201180060768.2A patent/CN103249935B/zh active Active
  • 2011-11-29 EP EP11794077.5A patent/EP2652301A1/de not_active Withdrawn

Non-Patent Citations (1)

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