EP0187926A2 - Système électronique pour former des grandeurs de commandes dans un véhicule à moteur - Google Patents

Système électronique pour former des grandeurs de commandes dans un véhicule à moteur Download PDF

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Publication number
EP0187926A2
EP0187926A2 EP85114944A EP85114944A EP0187926A2 EP 0187926 A2 EP0187926 A2 EP 0187926A2 EP 85114944 A EP85114944 A EP 85114944A EP 85114944 A EP85114944 A EP 85114944A EP 0187926 A2 EP0187926 A2 EP 0187926A2
Authority
EP
European Patent Office
Prior art keywords
electronic system
data
correction
supply voltage
connection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85114944A
Other languages
German (de)
English (en)
Other versions
EP0187926A3 (fr
Inventor
Michael Horbelt
Rüdiger Jautelat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0187926A2 publication Critical patent/EP0187926A2/fr
Publication of EP0187926A3 publication Critical patent/EP0187926A3/fr
Withdrawn legal-status Critical Current

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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
    • F02D41/30—Controlling fuel injection
    • F02D41/3005—Details not otherwise provided for
    • 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
    • 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
    • F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
    • F02D2200/503—Battery correction, i.e. corrections as a function of the state of the battery, its output or its type

Definitions

  • the invention is based on an electronic system for forming control variables in motor vehicles, in particular in connection with fuel metering, according to the preamble of the main claim.
  • a "device for regulating operating parameters of an internal combustion engine to optimum values" is known, which comprises a data processing system with a memory from which control data dependent on operating parameters can be read out.
  • the stored values can be adapted to the latest requirements so that the read values come as close as possible to optimal values.
  • the task expansion and application-friendliness of digital systems usually require an expansion of the data storage on the CPU (Central Processing Unit) by an external data storage.
  • CPU Central Processing Unit
  • One of the objects of the present invention is therefore to provide an electronic system for forming control variables in motor vehicles, in which it is ensured that only correct data are used for signal processing.
  • the electronic system according to the invention with the features of the main claim ensures, according to the task, that only data are used which were formed and stored when the system was operating properly.
  • FIG. 1 shows a rough overview diagram of a computer-controlled internal combustion engine control system
  • FIG. 2 shows a flow diagram with regard to the injection signal calculation.
  • FIG. 1 a computer-controlled system for an internal combustion engine is presented in a rough overview.
  • a microprocessor bears the reference numeral 10, 11 denotes the more or less independent input block and 12 the corresponding output block.
  • Memory modules have the reference numbers 13 and 14, 13 representing a ROM and 14 a RAM.
  • the input block 11 receives input signals relating to the data, such as speed and load, which are important for the control.
  • an injection valve 15 and a spark plug 16 are connected to block 12.
  • Their selection also documents only a partial aspect of the application of the invention. This is because the invention can be used wherever electronic systems for forming control variables are used in a motor vehicle and variables which can be called up in connection with signal processing can be changed. If the exemplary embodiment also relates to an internal combustion engine control system, the invention can also be used e.g. in principle also in connection with an anti-lock system or a transmission control.
  • FIG. 2 gives details of a flow chart for the formation of the corresponding quantities, incorporating the invention.
  • a block 21 follows with the calculation of input variables which are focused on the speed and load signals with regard to the injection signal generation.
  • a basic injection time te is read out from a memory depending on the number of patients and the load.
  • a correction 23 of the basic injection signal from block 22 the correction factor KKF being read out from an assigned correction map 24 and the new injection value resulting from the product of the basic injection value from block 22 multiplied by the map correction factor KKF.
  • An interrogation unit is identified by 27. It determines whether the possibly buffered supply voltage of the system or certain sub-areas e.g. reached the value of 12 volts or not. If this value is not reached, the end 28 of the program sequence follows immediately. In the other case, ie if the supply voltage UBatt has a sufficient value, the correction factor KKF of the block 24 is corrected in accordance with the latest requirements and thus the "learning" of the system is initiated (release of a learning algorithm and / or release of the storage) . This is done in block 29 with the value calculation of the correction factor KKF and the replacement of the original value (s) of this map with the latest data. After reading in the latest data - marked by a block 30 - the end 28 of the program again follows.
  • the injection system sketched with the flow diagram according to FIG. 2 thus calculates a basic injection signal from the most important input variables, which is then corrected by means of components having a multiplicative and additive effect.
  • One of these components - in the illustrated case a multiplicative one - is adapted to the latest requirements, so that corrections beyond this more or less correspond to a fine-tuning.
  • Query 27 now ensures that the calculation and / or exchange of the correction factors of block 24 takes place only when the operational readiness of the entire system or parts thereof is ensured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP85114944A 1984-12-24 1985-11-26 Système électronique pour former des grandeurs de commandes dans un véhicule à moteur Withdrawn EP0187926A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843447340 DE3447340A1 (de) 1984-12-24 1984-12-24 Elektronisches system zum bilden von steuergroessen bei kraftfahrzeugen
DE3447340 1984-12-24

Publications (2)

Publication Number Publication Date
EP0187926A2 true EP0187926A2 (fr) 1986-07-23
EP0187926A3 EP0187926A3 (fr) 1987-02-04

Family

ID=6253856

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85114944A Withdrawn EP0187926A3 (fr) 1984-12-24 1985-11-26 Système électronique pour former des grandeurs de commandes dans un véhicule à moteur

Country Status (3)

Country Link
EP (1) EP0187926A3 (fr)
JP (1) JPS61157742A (fr)
DE (1) DE3447340A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2510166B2 (ja) * 1986-09-15 1996-06-26 日本電装株式会社 内燃機関用吸入空気量制御装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5557956A (en) * 1978-10-25 1980-04-30 Nissan Motor Co Ltd Malfunction prevention unit of microcomputer
IT1129808B (it) * 1980-03-13 1986-06-11 Fiat Auto Spa Procedimento e dispositivo per la taratura dell emissione di ossido di carbonio al regime minimo di un motore ad iniezione di benzina per autoveicoli
US4309971A (en) * 1980-04-21 1982-01-12 General Motors Corporation Adaptive air/fuel ratio controller for internal combustion engine
JPS57165644A (en) * 1981-04-07 1982-10-12 Nippon Denso Co Ltd Control method of air-fuel ratio
JPS593136A (ja) * 1982-06-29 1984-01-09 Toyota Motor Corp 内燃機関の空燃比学習制御方法
GB2125577B (en) * 1982-08-16 1986-09-24 Nissan Motor Self monitoring system
JPS5949350A (ja) * 1982-09-13 1984-03-21 Nippon Denso Co Ltd 車輛制御用コンピュータにおけるバックアップメモリの内容保護装置

Also Published As

Publication number Publication date
DE3447340A1 (de) 1986-07-03
JPS61157742A (ja) 1986-07-17
EP0187926A3 (fr) 1987-02-04

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