CN110050119A - Method for determining the amount of injection of at least one injector of the fuel-metering system of the internal combustion engine of vehicle - Google Patents

Method for determining the amount of injection of at least one injector of the fuel-metering system of the internal combustion engine of vehicle Download PDF

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Publication number
CN110050119A
CN110050119A CN201780078052.2A CN201780078052A CN110050119A CN 110050119 A CN110050119 A CN 110050119A CN 201780078052 A CN201780078052 A CN 201780078052A CN 110050119 A CN110050119 A CN 110050119A
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China
Prior art keywords
combustion engine
internal combustion
motor
injector
injection
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Granted
Application number
CN201780078052.2A
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Chinese (zh)
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CN110050119B (en
Inventor
R.M.齐尔克
P.魏斯
C.巴尔德
P.哈格曼
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1497—With detection of the mechanical response of the engine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/0205—Diagnosing or detecting failures; Failure detection models
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
    • 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
    • F02D41/0097—Electrical control of supply of combustible mixture or its constituents using means for generating speed 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
    • 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
    • F02D41/24—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
    • 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
    • F02D41/32—Controlling fuel injection of the low pressure type
    • F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration
    • 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
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
    • B60W50/0205—Diagnosing or detecting failures; Failure detection models
    • B60W2050/021—Means for detecting failure or malfunction
    • 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
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0614—Actual fuel mass or fuel injection amount
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1002—Output torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The method of the amount of injection of at least one injector (18) of the fuel-metering system for the internal combustion engine (10) that the present invention relates to a kind of for determining vehicle, wherein internal combustion engine (10) torque transmitting ground is coupled with motor (40), wherein in vehicle stationary state internal combustion engine (10) with scheduled revolving speed (n) and scheduled load running, and obtain the value of the electric current generated by motor (40), and wherein, from the value of the electric current generated by motor (40), it is inferred to the amount of injection of at least one injector (18).

Description

For determining at least one injector of the fuel-metering system of the internal combustion engine of vehicle The method of the amount of injection
Technical field
The present invention relates to a kind of for determining the spray of at least one injector of the fuel-metering system of the internal combustion engine of vehicle The method and computer unit of the amount of penetrating and the computer program implemented for it.
Background technique
Combustion needed for fuel-metering system realizes by means of one or more injectors the burning measured in internal combustion engine Material.It directly sprays in gasoline in common rail injection, fuel is directly injected in combustion chamber.For burning quality and therefore internal combustion The consumption and exhaust behavior of machine, the fuel quantity of metering is vital.
However, the fuel quantity of metering is influenced by the characteristic of injector itself.Due in injector used in internal combustion engines The sample of appearance is spread, and is usually different for identical manipulation by the fuel quantity that different injectors measures, this can Burning quality is caused to reduce.All cylinders of same internal combustion engine are not all to generate identical torque in identical manipulation.It is this The consequence of torque difference is that non-uniform engine operation and discharge increase.It is tested, can be possessed in End-Customer by starting Motor vehicle in check internal combustion engine built-in injector amount deviation, without disassembly.Specific condition in workshop condition allows Change operation type and fixedly limit, stable operating point.This is not typically possible in running, because interior The control of combustion engine must realize the requirement of driver.Different the amount of injection can be identified when the starting of internal combustion engine is tested, Mode is for internal combustion engine by advising in advance for all injectors other than an injector by certain initial speed The fixed specified the amount of injection of fixed limit is accelerated (so-called starting) in certain period of time.Here, having may learn in the past Accurate sexual function, equilibrium function and the calibration function of the value of habit are suppressed, to identify virtual condition as clearly as possible.Then Measure the rotating speed of target reached.The injector not being steered is variation.If the rotating speed of target or a rotating speed of target with Thus the significant difference of the average value of other rotating speed of target can then derive the deviation of actual ejection amount and specified the amount of injection.
However, this, which has the drawback that, substantially only can be used the lesser range of speeds, the injector in the range of speeds Only export the sub-fraction of its amount commonly.Within the scope of the amount, the error that may especially work in high the amount of injection may It will not consumingly work to be detected.
A kind of method known from 10 2,009 028 374 A1 of DE, wherein being arranged in mixing to adjust and/or diagnose Internal combustion engine (internal combustion engine at least forms driving unit with a secondary machine) in power car by secondary machine to be adjusted The different operating statuses of internal combustion engine, by just or negative driving torque is applied on internal combustion engine, and at least the one of internal combustion engine A operating parameter is determined in the operating point being set.
Summary of the invention
According to the invention it is proposed that a kind of combustion of the internal combustion engine for determining vehicle of feature with independent claims The method and computing unit of the amount of injection of at least one injector of material metering system and the computer journey executed for it Sequence.Advantageous embodiment is dependent claims and theme described below.
The present invention is based on the measure for the load for being given internal combustion engine by means of motor, the motor and engine torque are transmitted Ground coupling.It is the measurement of the fuel quantity of actual implementation for electric current caused by certain internal-combustion engine rotational speed as motor.It is special thus The motor that combination drive Shi He be used, because this motor is usually that power is powerful and therefore can be with higher load points quilt Starting.However other motors are also able to use, such as setting is for recycling the motor or so-called 48V onboard power system of operation Motor.The present invention is especially realized for supplying to the direct evaluation of the energy of engine, by the energy for assessing motor Balance.
The present invention realizes the inspection in workshop to injector, and the positioning especially to the injector of failure, Mode is that a fixed revolving speed is elapsed the load point of internal combustion engine to higher load in vehicle stationary state.It determines to this It is qualitatively the presence of motor, which can apply to engine loads that it is made to use higher the amount of injection, without Make internal combustion engine by " excessively rotation " and is adjusted to excessively high revolving speed.Then it can be inferred that spray from the electric current generated by motor The amount of penetrating.
The actuator for influencing the energy output of internal combustion engine can be equally checked herein --- such as exhaust gas recirculation valve, throttling Valve, swirl valve, baffle, turbocharger etc..Such as the opening and closing of exhaust gas recirculation valve necessarily causes the energy of internal combustion engine to export Variation, and therefore lead to the change of evaluated electric current.This is equally applicable to turbocharger or other actuators.Cause This can diagnose out of order (such as blocking) actuator.
It is preferred that especially before having begun application load, checking whether before obtaining the amount of injection and meeting determination Release conditions.Especially check that the charged state for the battery for being charged to maximum state of charge by motor belongs to this.The battery must It must can receive the energy discharged by motor.Advantageously check that the Electricity Functional ability of the component of internal combustion engine also belongs to this.If As soon as being unsatisfactory in release conditions, it is not released then loading.It can be provided that actively the satisfaction for leading to release conditions, Such as by giving battery discharge.It is preferred that when release conditions are satisfied, release load.
It is preferred that especially before having begun application load, suspension or closing being capable of shadows before obtaining the amount of injection Ring the function of test result.Such as the function of particulate filter or Catalyst Regeneration is made to belong to this.
It is preferred that internal combustion engine is placed in the operating status of a restriction before obtaining the amount of injection.Provide predetermined turn Speed belongs to this.It is preferred that providing at least one parameters described below also belongs to this, which is selected from: fuel high pressure accumulator (oily rail) In pressure, the position of exhaust gas recirculation valve, the position of air throttle, the position of turbocharger-actuator restriction etc..With this Kind mode can obtain similar result.
It is preferred that the amount assimilation or torque assimilation of injector are executed, so that each injection before obtaining the amount of injection Device, which is substantially all, provides identical torque contribution.Such as in 2,004 010 412 A1 of DE 195 27 218 A1 or DE The method for cylinder assimilation (also referred to as " even running adjusting ") is disclosed, cylinder assimilation is also referred to as " fuel balance control (Fuel Balance Control:FBC) ".Turn here, being detected the current of internal combustion engine respectively by means of sensor device Speed, and the change procedure of revolving speed that analysis detection arrives.In this way it is possible to obtain torque ripple, thus, it is possible to be inferred to It is injected into the fluctuation of the fuel quantity in each cylinder of internal combustion engine.The difference of the fuel quantity of injection is then able to via using quality Correction value is adjusted to correct the mode of specified the amount of injection.
Computing unit according to the present invention --- such as motor vehicle controller or workshop tester are especially in program skill It is arranged for executing according to the method for the present invention in terms of art.
The implementation of the method in the form of a computer program is also advantageous, because this leads to especially low cost, especially It is when be used for implement controller be also used to other tasks therefore natively in the presence of.For providing the conjunction of computer program Especially magnetic, the optical and electric memory of suitable data medium --- such as hard disk, flash memory, EEPROM, DVD.It is logical Computer network (internet, Intranet etc.) is crossed to download program be also feasible.
Other advantages and embodiment of the invention are obtained according to the description and the appended drawings.
The present invention is schematically shown with reference to the embodiment in attached drawing, and it is retouched below with reference to the accompanying drawings It states.
Detailed description of the invention
Fig. 1 shows the extremely schematical view of the internal combustion engine with fuel injection system and multiple injectors.
Fig. 2 shows preferred embodiment according to the method for the present invention with process.
Fig. 3 is shown when implementing preferred embodiment according to the method for the present invention, the revolving speed of internal combustion engine and the amount of injection with And the change procedure of the electric current generated by motor.
Specific embodiment
In Fig. 1, it is schematically shown that the part of the internal combustion engine with fuel-metering system, the internal combustion engine can be this It the basis of invention and is indicated with 10.Internal combustion engine 10 may, for example, be diesel engine.
Internal combustion engine 10 has fuel reservoir 12, and fuel is transported to high compression ignition from fuel reservoir 12 by transportation system 14 In expects pipe line 16.Transportation system 14 may include such as high-pressure pump and metering units.
High pressure fuel pipeline 16 is for example configured to common rail.High pressure fuel pipeline 16 is connect with injector 18,18 energy of injector Enough inject fuel directly into being associated in the combustion chamber of injector 18 respectively for cylinder 20.The operation of internal combustion engine 10 and especially Be fuel injection system (it has transportation system 14, high pressure fuel pipeline 16 and injector 18 in the current situation) operation by Computing unit (being (engine) controller 22 here) control.Controller 22 is able to detect input value --- for example work as forward Speed --- and output valve or manipulation actuator, particularly manipulation injector 18 are provided.
For example so-called hybrid drive of motor 40(that can be run as motor and generator) to reverse the side transmitted Formula is connect with the crankshaft 24 of internal combustion engine 10, passes through V belt translation device 30 herein.Motor 40 can also be manipulated by control unit 22. Motor 40 is connect via rectifier 41 with the onboard power system with battery 42 of vehicle.
Control unit 22 is arranged for executing preferred embodiment according to the method for the present invention in terms of program technic, such as Below with reference to described in Fig. 2 and 3.Advantageously, therefore a kind of method is obtained: by accessing accordingly in the controller or having The program run in the workshop tester of the interface of the controller carrys out diagnosis injectors.Fig. 2 is here it is shown that according to the present invention The flow chart of the preferred embodiment of method, and Fig. 3 is shown when executing preferred embodiment according to the method for the present invention, it is interior The change procedure of the revolving speed n and the amount of injection m of combustion engine 10 and the electric current I t at any time generated by motor.
It is first checked in optional step 401, set release conditions are whether it is satisfied.Especially check battery 42 Following charged states belong to this: battery, which is not completed, to be full of, but can receive the electric energy generated during checking.
If meeting release conditions now, equally continue optional step 402, influences to survey in this step The function --- regeneration function of such as particulate filter or catalyst converter --- of test result is aborted.
In step 403, internal combustion engine is placed in the operating status of restriction.Especially, herein prespecified rated speed n, Such as idler revolutions or the revolving speed higher than idler revolutions.In addition, " operating status for being placed in restriction " includes: that prespecified high pressure stores The rated value of the other component of the rated value and prespecified internal combustion engine 10 of pressure in energy device 16 is for example especially exhaust gas again Circulating valve, throttle valve, turbocharger-actuator etc..Current the amount of injection m is advantageously stored.
In step 404, the actual inspection of injector 18 is in first time point t0Start (referring to Fig. 3).Especially, herein Step by step or (approximation) continuously improve motor 40 load.The load must make engine 10 make more function, to keep Speed n is constant.Thereby increase total the amount of injection m.Preferably, the relative amount of each injector fits each other simultaneously, so that All injectors provide identical torque contribution.
Motor 40 is driven by internal combustion engine 10 to be caused to generate electric current.The electric current of generation can be measured and directly with injection The engine torque of generation is proportional.Especially, the charging current in battery 42 can be measured.
If to obtain desired rated current in the battery, the amount of injection can be iteratively adjusted in step 405 M, until actual current is for example in time point t1It is consistent with rated current.In this way it is possible to obtain in " charging current 0 " and The difference of the amount of injection m between " charging current X " or from " charging current 0 " (t0) arrive " charging current X " (t1) injection quantitative change Change process.In order to be assessed, can especially carry out compared with reference value.For example, reference value can be described for each The amount of injection of 10mg increases in working cycles, and charging current increases 10A.
If necessary to more or fewer the amount of injection, then total the amount of injection of actual ejection is incorrect.Meanwhile Ke Yitong The torque having been described is crossed to assimilate to calculate the relative correction value of the amount of injection.By combining both bearing calibrations, can obtain Absolute individual error about each individual injector has great information.It therefore, can if required corrected value is too big Enough single injector is diagnosed as faulty.
Optionally, it now is possible in a step 406 in time point t2Check the execution for influencing the energy output of internal combustion engine 10 Device.In this case, the setting value (such as aperture of exhaust gas recirculation valve) of actuator is changed, for example improves.It is being mentioned To example in, this causes the power of internal combustion engine 10 to reduce, so that in the case where constant the amount of injection m, it is only necessary to which one is lesser Electric loading is constant to keep revolving speed n.As a result, electric current I reduces.It can be inferred that the function energy of actuator from the degree of this decline Power.
In step 407, this method terminates, such as answers the requirement of Service Technicians or ought no longer meet at least one When release conditions (for example, battery has been expired).

Claims (10)

1. the side of the amount of injection of at least one injector (18) of the fuel-metering system of the internal combustion engine (10) for determining vehicle Method, wherein internal combustion engine (10) torque transmitting ground is coupled with motor (40), wherein in vehicle stationary state
Internal combustion engine (10) obtains the electric current (I) generated by motor (40) with scheduled revolving speed (n) and scheduled load running Value, and
Wherein, from the value of the electric current (I) generated by motor (40), it is inferred to the amount of injection (m) of at least one injector (18).
2. method according to claim 1, wherein the amount of injection (M) by changing at least one injector (18) will It is adjusted by the electric current (I) that the motor (40) generate to rated value.
3. method according to claim 1 or 2, wherein before obtaining the amount of injection (m), assimilation it is described at least one The torque contribution of injector (18).
4. method according to any of the preceding claims, wherein multiple and different loads is determined by motor (40) change procedure of the value of the electric current (I) generated, and at least one described injector (18) is inferred to from the change procedure Functional Capability.
5. method according to any of the preceding claims, wherein change the energy output for affecting the internal combustion engine Actuator setting value, and be inferred to from the value of the electric current (I) generated by the motor (40) the Functional Capability of actuator.
6. method according to any of the preceding claims, wherein obtain the electric current (I) that is generated by motor (40) it Before,
It checks whether and meets at least one release conditions, and/or
At least one function that may influence test result is aborted, and/or
Internal combustion engine (10) enters in the operating status limited.
7. method according to any of the preceding claims, this method carries out in workshop.
8. computing unit (22), which is arranged for executing side according to any one of the preceding claims Method.
9. computer program, which promotes computing unit (22) to execute according to claim 1 to described in any one of 7 Method, when the computer program is performed on the computing unit.
10. machine readable storage medium has the computer program according to claim 9 being stored thereon.
CN201780078052.2A 2016-12-15 2017-11-15 Method for determining an injection quantity of at least one injector of a fuel metering system of an internal combustion engine of a vehicle Active CN110050119B (en)

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PCT/EP2017/079244 WO2018108414A1 (en) 2016-12-15 2017-11-15 Method for determining an injection amound of at least one injector of a fuel metering system of an internal combustion engine of a vehicle

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