CN110017234B - Method for operating a device of a computing unit - Google Patents

Method for operating a device of a computing unit Download PDF

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Publication number
CN110017234B
CN110017234B CN201811571197.9A CN201811571197A CN110017234B CN 110017234 B CN110017234 B CN 110017234B CN 201811571197 A CN201811571197 A CN 201811571197A CN 110017234 B CN110017234 B CN 110017234B
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Prior art keywords
computing unit
value range
computing
variables
range
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CN201811571197.9A
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CN110017234A (en
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D.P.霍夫曼-梅斯
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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
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D15/00—Varying compression 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
    • F02D41/24—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
    • 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
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/145—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using electrical means
    • F02P5/15—Digital data processing
    • F02P5/1518—Digital data processing using two or more central computing units, e.g. interpolation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N2300/00—Control related aspects of engine starting
    • F02N2300/30—Control related aspects of engine starting characterised by the use of digital means
    • F02N2300/302—Control related aspects of engine starting characterised by the use of digital means using data communication
    • F02N2300/306—Control related aspects of engine starting characterised by the use of digital means using data communication with external senders or receivers, e.g. receiving signals from traffic lights, other vehicles or base stations
    • 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)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The invention relates to a method for operating a computing unit arrangement, in particular in a vehicle, comprising at least one first computing unit (100) and a second computing unit (200) that is in communication therewith, wherein a parameter (P) is determined by means of the at least one first computing unit (100) within a set task range on the basis of a computing criterion (M) on the basis of current values of one or more variables (V), wherein for each of the variables (V) a corresponding first value range (W) is provided in the at least one first computing unit (100) 1 ) Wherein in a second calculation unit (200) a second value range (W) is provided for at least one of the variables 2 ) The second value range is greater than the associated first value range (W) 1 ) And comprises a first value range (W) to which it belongs 1 ) And wherein according to a second range of values (W) 2 ) The associated first value range (W) is redefined when a predefined condition exists or when one of a plurality of predefined conditions exists 1 ）。

Description

Method for operating a device of a computing unit
Technical Field
The invention relates to a method for operating a device, in particular a computing unit in a vehicle, and to a computing unit, a computing unit device and a computer program for carrying out the method.
Background
Control devices in vehicles are used to perform specific tasks, such as the control of the ignition timing in the case of an internal combustion engine. In this case, parameters such as the ignition time must be predefined in each case as a function of different variables or environmental conditions, such as gas pressure, temperature, etc., in order in particular to be able to achieve the most optimal possible operation of the internal combustion engine or of the vehicle.
Disclosure of Invention
According to the invention, a method for operating a device of a computing unit, as well as a computing unit, a computing unit device and a computer program for carrying out the method are proposed with the features of the independent patent claims. Advantageous embodiments are subject matter of the dependent claims and the subsequent description.
The method according to the invention is used for operating a computing unit arrangement, in particular in a vehicle, comprising at least one first computing unit and a second computing unit which is in communication connection with the at least one first computing unit. In this case, the control device can be considered in particular as a computing unit both for the at least one first computing unit and for the second computing unit. By means of the at least one first computation unit, a parameter is determined here within the scope of the set task (i.e. the task in which the at least one first computation unit is set up for executing the task) on the basis of the current values of the one or more variables according to the computation criterion. Environmental conditions can be considered in particular as such variables. Particularly suitable variables are, for example, ambient temperature, engine temperature, ambient pressure, air humidity, air pollution, fuel temperature, fuel quality, fuel composition, degree of ageing or wear and degree of impurity (Verunreinigungsgrad).
The at least one first calculation unit is preferably used here for controlling a subregion, in particular a subregion of a vehicle, further in particular a subregion of an internal combustion engine. That is to say, for example, it can relate to an engine control unit which determines the ignition time as a parameter within its task range. The parameters determined by the at least one first computing unit within the set task range are expediently selected from: ignition timing in the case of an internal combustion engine, injection timing of a fuel injector, amount of fuel to be injected of the fuel injector, valve stroke of a variable valve stroke system, valve closing timing and/or valve opening timing of a variable valve gear, and compression ratio of a variable crank gear (kurbeltieb).
In this case, for each of the variables in the calculation criterion, a respective first value range is provided in the at least one first calculation unit. When determining the parameter, the one or more variables are then therefore taken into account in the respective first value range provided, in order to thus find the most optimal value for the parameter. In particular, the calculation criterion can be coordinated with or optimized in accordance with the respective first value range. In the exemplary case of an ignition time as a parameter, the optimum ignition time is therefore determined, for example, on the basis of the current ambient temperature, the gas pressure and the fuel mass. The calculation criterion can take into account the respective variable with the current value as an input variable.
Since in each case insufficient memory space and/or computing power is available in the at least one first computing unit for providing a very large number of values in the respective first value range at in each case only a small distance from one another, it has hitherto been customary, for example, to interpolate between the values, while the first value range as a whole covers the necessary range (Spektrum), for example an ambient temperature of-40 ℃ to +60 ℃. However, this often leads to unsatisfactory results in determining the parameters.
It is therefore proposed from now on that, in the second calculation unit, for at least one of the variables, but preferably for a plurality or all of the variables, a second value range is provided which is greater than and comprises the associated first value range. In the first computing unit, the associated first value range is then redefined as a function of the second value range (in particular as a subset of the second value range) if a predefined condition exists or if one of a plurality of predefined conditions exists.
This therefore now makes it possible to construct the first value range smaller than hitherto, i.e. only in the size of 10 ℃, for example in the range from 10 ℃ to 20 ℃, for example, with ambient temperature as a variable. However, the entire memory space of the respective first computation unit can be fully utilized for the first value range, so that the density of values in the respective first value range is significantly higher than was the case hitherto. This results in a significantly better or more accurate determination or calculation of the parameters.
It goes without saying that in this way, a plurality of parameters can also be determined in the at least one first computing unit using corresponding variables, which may also overlap. It is likewise possible to provide a plurality of such first computing units, in the case of which the processing is carried out in the same way.
The predetermined condition or the plurality of predetermined conditions is/are preferably selected from: starting (Aufstarten) the at least one first computing unit; the current value of the variable to which the second value range is assigned changes by more than a predefined threshold value; expiration of a predetermined time interval; and an external redefinition signal. In this way it is ensured that: the first value range is always kept up to date. The redefinition can then expediently also be carried out individually for the individual first value ranges or for the individual first value ranges only. In the example mentioned with an ambient temperature of the first value range of 10 to 20 ℃, the first value range can be changed or redefined to a range between 5 and 15 ℃, for example when the current ambient temperature drops below 12 ℃.
It is particularly preferred that the second value range provided in the second computing unit for at least one of the variables is provided by a further computing unit of the apparatus and/or from an external source, in particular one or more remote computing units (i.e. computing units which are not part of the apparatus, in particular also connected by a wireless communication connection), and/or a fleet. As a result, as good or precise values as possible of the respective value range can be obtained with significantly more resources. The one or more remote computing units can in particular also collect and then provide the necessary data accordingly from other sources.
As already mentioned, it is also particularly expedient in the proposed method for the second computing unit to have a higher computing capacity and/or a larger memory space than the at least one first computing unit, since the respective current values of the variables are particularly benefited from the proposed redefinition of the first value range. This advantage works in particular when a plurality of such first calculation units are used.
The computing unit according to the invention, for example, a control unit of a motor vehicle, is designed in particular in terms of program technology to carry out the steps of the method according to the invention, which steps are carried out by the first or second computing unit. In other words, the first and second computing units are also the subject of the invention individually.
The first computing unit is therefore set up in particular for determining parameters within the scope of the set task as a function of the computing criteria on the basis of the current values of one or more variables and for providing a respective first value range for each of the variables and, if a predefined condition exists or if one of a plurality of predefined conditions exists, for redefining, in particular receiving, the first value range.
The second computing unit is thus in particular designed to provide a second value range for at least one of the variables, which is greater than and includes the associated first value range, and to output a subset of the second value range as the value range to be redefined to the first computing unit, in particular in the event of a predetermined condition or in the event of one of a plurality of predetermined conditions.
The inventive computing unit arrangement, for example, a control unit complex (Steuerger 228subvund) of a motor vehicle, is designed in particular in terms of program technology for carrying out the inventive method. Such a computing unit arrangement also has at least two computing units, namely at least one first mentioned computing unit and one second mentioned computing unit.
The implementation of the method in the form of a computer program is also advantageous, since this results in particularly low costs, in particular when the control device being implemented is also used for further tasks and is therefore already present. Suitable data carriers for providing the computer program are, inter alia, magnetic, optical and electronic memories, such as a hard disk, flash memory, EEPROM, DVD and others. It is also possible to download the program via a computer network (internet, intranet, etc.).
Further advantages and configurations of the invention emerge from the description and the drawing.
The invention is schematically illustrated in the drawings according to embodiments and is described below with reference to the drawings.
Drawings
Fig. 1 schematically shows, in a preferred embodiment, a computing unit arrangement according to the invention, with which a method according to the invention can be carried out.
Detailed Description
Fig. 1 schematically shows a preferred embodiment of a computing unit arrangement according to the invention, with which a method according to the invention can be carried out, which method is described below in a preferred embodiment.
The computing unit arrangement (or the arrangement of computing units) has a first computing unit 100 and a second computing unit 200, which are in communication connection. This CAN be done, for example, in the vehicle electrical system of the vehicle in the range of a bus connection (for example CAN or FlexRay). It goes without saying that, as already mentioned, a plurality of such first calculation units may also be provided, in which case, however, the procedure described below applies equally.
The first computing unit 100, for example an engine control unit, now has to determine the parameter P, for example the ignition time, within its task range. This is done based on the current values of a number of variables. The variable V, which may be the ambient temperature, is shown by way of example.
In the first computing unit 100, a first value range W to which (vorgehalten) belongs is provided only for this variable V 1 Different values of the variable are set in the first value range. Within the scope of the calculation criterion M, the parameter P can then be calculated or determined on the basis of the current value of the variable. In this connection, it is conceivable, for example, to adapt the preset value of the (ansassung) parameter in dependence on the current value of the variable.
In the second calculation unit 200, the associated second value range W is now provided for the variable V 2 Said second value fieldComprising a first value range W 1 And in particular also larger, i.e. for example covering a temperature range of-40 ℃ to +60 ℃, whereas the first value range only covers a range of magnitude 10 ℃.
Now, for example, upon application of the redefining signal K and/or other conditions, the second value range W is used 2 Redefining a first value range W of a first calculation unit 1 Or calculate the criterion M. For example, the criterion M or the first value range W is calculated 1 And thus can be adapted to varying ambient temperatures. This can be done for further variables and for further value ranges, respectively.
Second value range W 2 Furthermore, it can be transmitted to a second computing unit via an external source 300, for example a remote computing unit or a fleet (Fahrzeugflotte), or the second value field can be updated in this way. Thus, for example, new knowledge or experience may be injected. Likewise, possible recognitions from the first computing unit 100 may be reported back to the second computing unit 200 and thus also further back to the remote computing unit or the like.
Overall, since the calculation criterion is significantly more precise on the basis of the first range, which is smaller, but for this purpose may contain values of a higher density, the accuracy in the determination of the parameter P can be significantly increased in this way.

Claims (19)

1. Method for operating a computing unit arrangement comprising at least one first computing unit (100) and a second computing unit (200) in communicative connection with the at least one first computing unit,
wherein the parameter (P) is determined by means of the at least one first computing unit (100) within the set task range according to a computing criterion (M) on the basis of current values of one or more variables (V), wherein for each of the variables (V) a respective first value range (Wt) is provided in the at least one first computing unit (100) 1 ），
Wherein in the second calculation unit (200) for at least one of the variables a second calculation unit is providedValue range (W) 2 ) The second value range is greater than the associated first value range (W) 1 ) And comprises an associated first value range (W) 1 ) And, and
wherein according to the second value range (W) 2 ) Redefining the associated first value range (W) when a predetermined condition exists or when one of a plurality of predetermined conditions exists 1 ）。
2. The method according to claim 1, wherein the predetermined condition or conditions are selected from: starting the at least one first computing unit; the current value of the variable to which the second value range is assigned changes by more than a predefined threshold value; expiration of a predetermined time interval; and an external redefinition signal (K).
3. Method according to claim 1 or 2, wherein the second value range (W) provided in the second calculation unit (200) for at least one of the variables (V) is provided by a further calculation unit of the device and/or from an external source (300) 2 ）。
4. The method of claim 3, wherein the external source (300) is one or more remote computing units and/or a fleet of vehicles.
5. The method according to claim 1 or 2, wherein the plurality of variables (V) are selected from: ambient temperature, engine temperature, ambient pressure, air humidity, air pollution, fuel temperature, fuel quality, fuel composition, degree of degradation or wear, and impurity level.
6. The method according to claim 1 or 2, wherein the second computing unit (200) has a higher computing power and/or a larger memory space than the at least one first computing unit (100).
7. The method according to claim 1 or 2, wherein the at least one first calculation unit (100) is used for controlling a partial area.
8. The method according to claim 7, wherein the at least one first computing unit (100) is used for controlling a partial region of a vehicle.
9. The method according to claim 8, wherein the at least one first computing unit (100) is used for controlling a partial region of an internal combustion engine.
10. The method according to claim 1 or 2, wherein the parameter (P) determined by the at least one first computing unit (100) within the set task range is selected from: in the case of an internal combustion engine, the ignition time, the injection time of the fuel injector, the quantity of fuel to be injected by the fuel injector, the valve stroke of the variable valve stroke system, the valve closing time and/or the valve opening time of the variable valve drive, and the compression ratio of the variable crank gear.
11. The method of claim 1 or 2, wherein the computing unit device is a computing unit device in a vehicle.
12. A computing unit (100) which is set up to determine parameters within the set task range according to a computing criterion on the basis of the current values of one or more variables and to provide a respective first value range for each of the variables and to redefine the first value range according to the received value range if a predefined condition exists or if one of a plurality of predefined conditions exists.
13. The computing unit (100) according to claim 12, which is set up to control the partial regions.
14. The computing unit (100) according to claim 13, configured to control a partial region of a vehicle.
15. The computing unit (100) according to claim 14, configured to control a partial region of an internal combustion engine.
16. The computing unit (100) according to any one of claims 12 to 15, wherein the parameter (P) determined by the computing unit (100) within the set task range is selected from: in the case of an internal combustion engine, the ignition time, the injection time of the fuel injector, the quantity of fuel to be injected by the fuel injector, the valve stroke of the variable valve stroke system, the valve closing time and/or the valve opening time of the variable valve drive, and the compression ratio of the variable crank gear.
17. A computation unit (200) which is set up to provide a value range for at least one variable and to output a subset of the value range as the value range to be redefined if a predefined condition exists or if one of a plurality of predefined conditions exists.
18. Computing unit arrangement having at least two computing units (100, 200), which is set up for carrying out the method according to one of claims 1 to 11.
19. Machine-readable storage medium having stored thereon a computer program which causes a computing unit (100) or a computing unit arrangement having at least two computing units (100, 200) to execute the method according to one of claims 1 to 11 when the computer program is implemented on the computing unit or computing unit arrangement.
CN201811571197.9A 2017-12-22 2018-12-21 Method for operating a device of a computing unit Active CN110017234B (en)

Applications Claiming Priority (4)

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DE102017223747.3 2017-12-22
DE102017223747 2017-12-22
DE102018200032.8A DE102018200032A1 (en) 2017-12-22 2018-01-03 Method for operating an arrangement of computing units
DE102018200032.8 2018-01-03

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CN110017234B true CN110017234B (en) 2022-11-08

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Publication number Priority date Publication date Assignee Title
JPH0742595A (en) * 1993-07-29 1995-02-10 Toyota Motor Corp Abnormality deciding device for internal combustion engine
DE102004012428A1 (en) * 2003-09-23 2005-04-28 Bosch Gmbh Robert Method, computer program and apparatus for operating an internal combustion engine
JP4492664B2 (en) * 2007-09-28 2010-06-30 株式会社デンソー Fuel supply amount estimation device and fuel pressure injection system
EP2392805B1 (en) * 2010-06-04 2013-07-31 Honda Motor Co., Ltd. Fuel injection control system
DE102011006752B4 (en) * 2011-04-05 2014-05-22 Continental Automotive Gmbh Method and device for controlling a variable valve train of an internal combustion engine
JP5880327B2 (en) * 2012-07-23 2016-03-09 三菱自動車工業株式会社 Engine control device
DE102013001043B3 (en) * 2013-01-22 2013-10-31 Audi Ag Method for operating combustion engine of motor car, involves determining target compression ratio by expected size estimation operating variable estimated based on current gradient of operating parameter over time, in prediction mode

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DE102018200032A1 (en) 2019-06-27

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