EP3060785A1 - Verfahren zum betreiben eines verbrennungsmotors - Google Patents
Verfahren zum betreiben eines verbrennungsmotorsInfo
- Publication number
- EP3060785A1 EP3060785A1 EP14738781.5A EP14738781A EP3060785A1 EP 3060785 A1 EP3060785 A1 EP 3060785A1 EP 14738781 A EP14738781 A EP 14738781A EP 3060785 A1 EP3060785 A1 EP 3060785A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cam
- camshaft
- dimension
- fuel
- determined
- 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.)
- Granted
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
- F02D41/2406—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
- F02D41/2435—Methods of calibration characterised by the writing medium, e.g. bar code
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/047—Camshafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/08—Shape of cams
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2303/00—Manufacturing of components used in valve arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/09—Calibrating
-
- 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
-
- 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
Definitions
- the invention relates to a method for operating an internal combustion engine, wherein within a working cycle of the engine, a valve of a cylinder is opened by a cam of a camshaft and the cylinder to a predetermined amount
- Fuel is supplied. Furthermore, the invention relates to an internal combustion engine, which can be operated according to the inventive method.
- the camshaft of a conventional internal combustion engine is driven via a fixed connection from the crankshaft at its half speed.
- the control and intervention options are limited in such valve trains.
- variable cam timing or variable valve timing By a variable cam timing or variable valve timing, the timing of the valve timing can be changed as needed. This allows an increase in engine efficiency, on the one hand by a gain in torque depending on the load and on the other by fuel economy.
- Methods are known for adjusting the overlap in four-stroke engines, which can be used to influence the time in which the intake and exhaust valves are open at the same time. For this purpose, one or more phasers may be provided.
- Other methods are known in which the crankshaft and camshaft are adjusted relative to each other, whereby the timing can be changed as needed.
- methods are known in which the maximum valve lift can optionally be varied continuously.
- Invention a method for operating an internal combustion engine by optimizing the valve control in such a way that the engine can be operated particularly optimized emissions and consumption.
- This object is achieved by a development of the described method, which is characterized essentially in that after measurement of the cam and / or the camshaft, a dimension of the cam and / or a position of the cam on the camshaft is measured, the dimension, position and / or a parameter calculated therefrom is stored, and the amount of fuel to be supplied within the working cycle as a function of the stored
- the invention is based on the knowledge that it in the production of cams for the actuation of gas exchange valves fluctuation of the manufactured
- Ventilhubverierin the actuated by the cam gas exchange valves.
- the manufacturing tolerance in the transverse direction of the camshaft far projecting cam lead to a longer valve opening time than one in the context of
- cams o regularly in the form of separate cam elements such as cams o
- Cam carrier shaft are attached.
- the individual cam carrier shaft are attached.
- Cam elements pushed onto the cam carrier shaft and attached thereto in an intended rotational position and axial position may arise due to the production due to the attachment regularly deviations of the actual rotational position of the individual cam elements of the intended rotational position.
- a different rotational position leads to a shifted valve opening window and thus to a different gas flow behavior.
- the fuel injection quantity per operating cycle is adapted to these, depending on the actual cam arrangement different fresh gas filling by After the manufacture of the cam and / or the camshaft, a dimension of the cam and / or a position of the cam on the camshaft is measured and stored. Alternatively, one of the dimension and / or location of the
- Cam determined characteristic value to be stored which indicates the cam-specific valve lift and / or another variable, which represents a measure of the per valve lift under predetermined boundary conditions in / out of / the combustion chamber on or outflowing gas.
- the parameter may specify a time and / or a time window of the valve opening or a valve opening course. This parameter or several parameters can be determined from the measured dimension and / or position of the cam or calculated using further parameters or engine parameters.
- the quantity of fuel to be supplied within one working cycle can now be determined as a function of the dimension, position and / or the parameter (s) calculated therefrom. This results in that for the cylinder within a
- Adjusted fuel cycle to the actual valve lift and the actually supplied amount of fresh gas is adjusted, whereby the combustion behavior and thus the emission behavior for the corresponding cylinder is optimized.
- the valve actuated by the cam is not necessarily an inlet valve, but may also be an exhaust valve of the cylinder. The within one
- the optimum amount of fuel to be supplied to the working cycle may also depend on the opening of one or more exhaust valves of the cylinder.
- the internal combustion engine can be a diesel, a gasoline engine or another
- the engine is a four-stroke gasoline engine.
- the invention is not limited to these types of engines.
- the fuel is injected directly into the cylinder, the
- the method according to the invention can also be used in engines with supply of fuel upstream of the intake valve.
- Valve lift characteristics of the individual cams are stored, and the amount of fuel that is fed per cycle to two or more cylinders, respectively a cam is assigned, is determined in dependence on the dimension, position and / or the characteristic calculated therefrom of that cam which is associated with the respective cylinder.
- Cylinder-spanning total gas quantity is measured by means of a sensor and the injection quantity is adapted across cylinders. If, however, the
- Injection amount cam-individual adapted to the particular contour and / or position of the cam fuel consumption and emissions can be further reduced and the concentricity of the engine can be improved.
- the filling detection of the individual cylinders is specified, and the fuel injection is performed cylinder-specific.
- the fuel injection and combustion is thus operated optimized emissions and consumption.
- the amount of fuel determined in each case is preferably injected into the individual cylinders per operating cycle.
- the methods of variable valve control explained in the introduction can additionally be used to further optimize the valve timing.
- the measurement error is less than that
- Camshaft production The more accurately the cam contour and cam position are measured, the more precisely the injection quantity of the fuel can be adapted to it, which leads to an improved combustion behavior for each individual cylinder.
- the step of measuring the cams is preferably carried out following the attachment of the individual cams on the camshaft, so that the rotational position or the deviation from an intended rotational position of the individual cams in
- Circumferential direction can be measured. It has proven to be expedient that in the production of the camshaft one or more cams are attached to a cam carrier shaft, wherein the rotational position of the one or more cams in the circumferential direction of the camshaft is measured after manufacture.
- the individual cam elements, each carrying one or more cams, are thereby preferably by means of press fit to the
- Cam support shaft added.
- the deviation of the actual rotational position from the intended rotational position is great in this manufacturing method, so that there are significant improvements with regard to concentricity and combustion behavior of the engine as a result of the method according to the invention.
- a dimension of the cam in the radial direction, a dimension of the cam in the circumferential direction of the camshaft axis and / or a profile of the cam running surface can be measured. These variables also have an influence on the valve lift, in particular on the valve opening time and the
- Valve opening timing Alternatively or additionally, the axial position of the cam on the camshaft and / or the mutual position of the individual cams of the camshaft can be measured.
- Ventilhubkennles or more valve lift characteristics are determined.
- an assignment is preferably stored in a control unit of the engine, the predetermined Ventilhubkennies, allocates fuel injection quantities, wherein the control unit, a comparison of previously determined Ventilhubkennles is performed with the assignment and from the amount of fuel to be supplied per cycle preferably cylinder-individually determined.
- engine control units receive previously determined or calculated data records which determine the quantities of fuel to be injected as a function of certain
- Specify engine parameters For example. These data sets can indicate injection quantities as a function of speed, load, a total quantity of air drawn in, temperature, throttle position, etc. According to the invention, these datasets additionally give the intended injection quantity as a function of the measured dimension and / or position, in particular the rotational position in which the cam is fastened to the camshaft, or the characteristic variables determined therefrom. Since the production-related rotational positions and the dimensions of the individual cams of the camshaft after manufacture no longer change when operating the internal combustion engine, after completion of the engine a unique
- Assignment process activates a to be used for the future operation of the engine injection quantity map in the engine control unit, so that in the future cylinder-individually injected correctly depending on the cam dimensions.
- the comparison of the actual valve lift characteristics described above with the assignment is only once after the
- the measurement and / or position of the cam determined by measurement is stored in the form of an optically readable code such as a data matrix code (DMC) or a barcode.
- the optically readable code can be read by a reading device, such as a scanner, and transferred to a database or memory.
- the measured rotational position can be stored for each cam of a camshaft in the form of a separate DMC, and / or a single DMC can be created which determines the rotational positions of all the cams of a camshaft
- Camshaft indicates.
- the storage can take place in that the optically readable code, in particular the DMC, by means of laser, needle embossing or the like. permanently inscribed in the cam, camshaft, hood module or other engine component.
- the DMC can be mounted on a component of the engine by means of a label or the like, so that correct assignment to the measured cams is possible at any time later.
- the contents of the DMC may be read by a scanner and transferred to a suitable controller such as the engine controller, a database, and / or a memory.
- Optically readable codes are particularly suitable for the permanent attachment of information to a component and can later be easily read at any time using a scanner.
- a DMC is suitable for storing a particularly large amount of information and is due to the used
- DE 10 2010 048 126 A1 describes the recording of a clutch characteristic and its storage by means of a data matrix Codes such that the data matrix code is reloaded on the coupling system. This data matrix code can then be read out by means of a scanner.
- DE 10 201 1 1 14 066 A1 describes the application of a label on a double clutch, wherein the label carries a bar code or a data matrix code which characterizes a characteristic curve of the double clutch.
- DMCs are used according to the invention for storing dimensions and / or positions of engine components, in particular cams of a camshaft.
- the finished unit can be taken from the exact dimension and / or position of the component such as the real position of the individual cams of the camshaft.
- the individual components of the engine are thus individualized according to the invention.
- the DMC is permanently attached to a motor component, in particular at an accessible position, so that a later readout is possible in a simple manner.
- the invention relates to an internal combustion engine with at least one camshaft having at least one cam for opening a valve of a cylinder and with an injection device for supplying a predetermined amount of fuel per working cycle in the cylinder.
- a control device with access to a previously measured size and / or position of the cam and / or to a determined characteristic and with means for determining the amount of fuel to be supplied per duty cycle in dependence Location or dimension of the cam and / or the characteristic determined therefrom provided.
- Internal combustion engine is the injection into the individual cylinders in coordination with the actual dimensions and the actual rotational position of the cam associated with the cylinder, so that the engine can be operated particularly optimized fuel consumption.
- the control unit for several, in particular all cylinders of the engine determine the amount of fuel to be supplied in each case in dependence on the measured rotational position of the respective cam associated with the cylinder.
- the individual cams or an engine component that may be associated with the cams may have a DMC printed thereon or otherwise inscribed therein indicating a dimension and / or a mounting position of the cams.
- the dimensions and / or positions of the cams of the camshaft or parameters calculated therefrom can be stored in the engine control unit, a database or a memory to which the engine control unit has access. It suffices if this access is made possible once before commissioning or before delivery of the engine, so that for the later operation of the engine, the cylinder-individual
- Fig. 1 the sequence of the method according to the invention in the form of a
- the rotational position of the cam on the camshaft is measured at step S2.
- the step of measuring may in particular comprise the determination of a twist angle by which the cam disk is rotated in the circumferential direction, starting from an intended installation position of the cam disk, wherein the intended installation position can be marked on the cam carrier shaft.
- further dimensions of the cam can be measured.
- the measured values are permanently written in S3 in the form of a DMC by means of a laser or the like into the cam element or into another motor component.
- the content of the DMC is read out at S4 by means of a scanner or the like and fed to a control unit at S5, which calculates a valve lift characteristic therefrom.
- the controller determines which amounts of fuel to use in the presence of certain engine parameters. For this purpose, a specific injection quantity map can be activated by the control unit as a function of the valve lift characteristic for each cylinder, the values of which are used in the future operation of the engine.
- This method is carried out for each cam of the camshaft, so that the injection takes place in the individual combustion chambers of the engine cam-individual.
- the method illustrated in FIG. 1 is to be understood as an example.
- the measured cam positions are not necessarily stored by means of a DMC.
- a measurement of the individual cams before mounting on the DMC is to be understood as an example.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201310221242 DE102013221242A1 (de) | 2013-10-21 | 2013-10-21 | Verfahren zum Betreiben eines Verbrennungsmotors |
| PCT/EP2014/064016 WO2015058869A1 (de) | 2013-10-21 | 2014-07-02 | Verfahren zum betreiben eines verbrennungsmotors |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3060785A1 true EP3060785A1 (de) | 2016-08-31 |
| EP3060785B1 EP3060785B1 (de) | 2017-05-10 |
Family
ID=51177049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14738781.5A Active EP3060785B1 (de) | 2013-10-21 | 2014-07-02 | Verfahren zum betreiben eines verbrennungsmotors |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20160273474A1 (de) |
| EP (1) | EP3060785B1 (de) |
| KR (1) | KR101762085B1 (de) |
| CN (1) | CN105658938B (de) |
| DE (1) | DE102013221242A1 (de) |
| WO (1) | WO2015058869A1 (de) |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3975951A (en) * | 1974-03-21 | 1976-08-24 | Nippon Soken, Inc. | Intake-air amount detecting system for an internal combustion engine |
| JPS571950A (en) * | 1980-06-05 | 1982-01-07 | Toyota Motor Corp | Method and device for judging abnormal state of moving valve system of engine |
| US4446836A (en) * | 1981-10-23 | 1984-05-08 | Lucas Industries Public Limited Company | Fuel injection pumping apparatus |
| IT1253305B (it) * | 1991-11-12 | 1995-07-14 | Marposs Spa | Apparecchiatura e metodo per il controllo di caratteristiche di un albero a camme |
| US5634448A (en) * | 1994-05-31 | 1997-06-03 | Caterpillar Inc. | Method and structure for controlling an apparatus, such as a fuel injector, using electronic trimming |
| JP3783285B2 (ja) * | 1995-07-03 | 2006-06-07 | マツダ株式会社 | エンジンの制御装置 |
| DE69806833T2 (de) * | 1997-04-04 | 2003-04-10 | Toyota Jidosha K.K., Toyota | Dreidimensionaler Nocken und Ventiltriebvorrichtung |
| JP3820347B2 (ja) * | 2000-12-28 | 2006-09-13 | 本田技研工業株式会社 | カム組立体およびカム位置決め装置 |
| US20020101595A1 (en) * | 2001-01-31 | 2002-08-01 | Johnson Richard M. | Device and method for inspecting cam profiles |
| JP2005337387A (ja) * | 2004-05-27 | 2005-12-08 | Toyota Motor Corp | 固体性能情報の書込み方法 |
| DE102006041072A1 (de) * | 2006-09-01 | 2008-03-06 | Robert Bosch Gmbh | Verfahren zum Justieren einer Prüfvorrichtung für ein nockengetriebenes Kraftstoff-Einspritzsystem, insbesondere ein Pumpe-Düse-oder Pumpe-Leitung-Düse-Einspritzsystem |
| WO2009034812A1 (ja) * | 2007-09-13 | 2009-03-19 | Toyota Jidosha Kabushiki Kaisha | エンジン学習値受渡システム |
| DE102010048126A1 (de) | 2009-10-22 | 2011-04-28 | Schaeffler Technologies Gmbh & Co. Kg | Kupplungsmomentenkennlinie |
| EP2336534A1 (de) * | 2009-12-18 | 2011-06-22 | Delphi Technologies, Inc. | Verfahren und System zur injektorindividiuellen Anpassung der Einspritzzeit von Kraftfahrzeugen |
| DE112011104163A5 (de) | 2010-10-28 | 2013-09-05 | Schaeffler Technologies AG & Co. KG | Verfahren zur Inbetriebnahme eines Antriebsstrangs in einemn Kraftfahrzeug |
| DE102010055139A1 (de) * | 2010-12-18 | 2012-06-21 | Neumayer Tekfor Holding Gmbh | Verfahren zur Montage eines Gegenstandes, Montageanlage und Gegenstand |
| US9249692B2 (en) * | 2011-07-21 | 2016-02-02 | Mahle International Gmbh | Camshaft and associate manufacturing method |
| US8967103B2 (en) * | 2013-03-04 | 2015-03-03 | Caterpillar Inc. | Variable valve timing arrangement |
-
2013
- 2013-10-21 DE DE201310221242 patent/DE102013221242A1/de not_active Withdrawn
-
2014
- 2014-07-02 EP EP14738781.5A patent/EP3060785B1/de active Active
- 2014-07-02 KR KR1020167012130A patent/KR101762085B1/ko active Active
- 2014-07-02 CN CN201480057871.5A patent/CN105658938B/zh active Active
- 2014-07-02 US US15/030,968 patent/US20160273474A1/en not_active Abandoned
- 2014-07-02 WO PCT/EP2014/064016 patent/WO2015058869A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| US20160273474A1 (en) | 2016-09-22 |
| EP3060785B1 (de) | 2017-05-10 |
| CN105658938B (zh) | 2019-01-08 |
| KR20160067963A (ko) | 2016-06-14 |
| WO2015058869A1 (de) | 2015-04-30 |
| KR101762085B1 (ko) | 2017-07-26 |
| DE102013221242A1 (de) | 2015-04-23 |
| CN105658938A (zh) | 2016-06-08 |
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