EP0207316B1 - Regelanordnung für eine Brennkraftmaschine - Google Patents

Regelanordnung für eine Brennkraftmaschine Download PDF

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Publication number
EP0207316B1
EP0207316B1 EP86107566A EP86107566A EP0207316B1 EP 0207316 B1 EP0207316 B1 EP 0207316B1 EP 86107566 A EP86107566 A EP 86107566A EP 86107566 A EP86107566 A EP 86107566A EP 0207316 B1 EP0207316 B1 EP 0207316B1
Authority
EP
European Patent Office
Prior art keywords
combustion engine
arrangement according
internal combustion
control arrangement
fuel quantity
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.)
Expired - Lifetime
Application number
EP86107566A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0207316A2 (de
EP0207316A3 (en
Inventor
Albin Hassler
Rainer Rudolph
Jürgen Wietelmann
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 EP0207316A2 publication Critical patent/EP0207316A2/de
Publication of EP0207316A3 publication Critical patent/EP0207316A3/de
Application granted granted Critical
Publication of EP0207316B1 publication Critical patent/EP0207316B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
    • F02D35/0007—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for using electrical feedback
    • 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
    • F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
    • 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
    • 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
    • F02D2041/226—Fail safe control for fuel injection pump

Definitions

  • the object of the invention relates to a control arrangement for an internal combustion engine with a digital computing device.
  • An output stage is used to influence a fuel metering device, the computing device activating the output stage as a function of the fuel quantity to be supplied to the internal combustion engine.
  • Such a device is known from DE-A 32 35 345 or DE-A 31 30 094.
  • control arrangements are described, which measure the actual fuel quantity supplied to the internal combustion engine with the aid of a control path transmitter. This signal is fed to an actuator.
  • a signal processing unit uses other operating parameters of the internal combustion engine to determine the ideal fuel quantity for the respective operating state.
  • a signal box influences the internal combustion engine depending on these actual and target values.
  • control arrangements must be designed so that they have stable control behavior even under extreme operating conditions (emergency operation). At the same time, however, they must ensure quick and precise adjustment, in particular adjustment without overshooting to the corresponding desired value. Due to the limited storage capacity and also the finite computing time, it is not possible to optimally meet all of the requirements mentioned with the aid of the devices described in the prior art.
  • the invention has the advantage that, with optimal emergency driving properties, precise and rapid control of an internal combustion engine is possible at the same time.
  • a coupling circuit independently of the computing device, but depending on the amount of fuel supplied to the internal combustion engine also controls the output stage.
  • Another advantage of the invention is to link the actual input signal of the control loop directly to the output signal of the coupling circuit for emergency operation.
  • the exemplary embodiment described relates to the control of a diesel internal combustion engine.
  • the invention is not limited to self-igniting internal combustion engines, but can also be applied in an analogous manner to other types of internal combustion engines.
  • a pedestrian 10 (FFG), an analog / digital converter 11 (ADC), a link 22, a first control algorithm 12 (RA1), a limitation 13, a link 20, a second control algorithm 14 (RA2), a digital / analog converter 15 (DAC), a link 24, an output stage 16 (ES), an injection pump 17 (EP) and an internal combustion engine 18 (BKM) a series connection.
  • the output signal of the internal combustion engine 18 is the rotational speed N of the internal combustion engine, this signal being fed via an analog / digital converter 21 (ADC) with a negative sign to the link 22.
  • the input signal of the internal combustion engine 18 is the control path RW of the injection pump 17, this signal being connected to the link 20 on the one hand via a further analog / digital converter 19 (ADC) provided with a negative sign, and on the other hand via a coupling circuit 23 (KS) is also provided with a negative sign connected to the link 24.
  • ADC analog / digital converter
  • KS coupling circuit 23
  • the output signal of the pedestrian 10 is also coupled to the link 24 via a switching device 26.
  • the switching device 26 is normally in its open state and is only closed under certain operating conditions. This closing is done by the microprocessor with the number 25, wherein the microprocessor (25) carries out or has at least the functions or devices designated with the numbers 11, 22, 12, 13, 20, 14, 15, 19 and 21.
  • the individual blocks of the block diagram described can also be influenced by further operating parameters, not shown, e.g. in particular the limitation 13 by the charge air pressure PL and the charge air temperature TL of a turbocharger which may be present or by the fuel temperature TK or the engine temperature TM etc.
  • the speed N of the internal combustion engine can also act on the limitation 13, as shown in broken lines.
  • a first control loop of the exemplary embodiment shown consists of the second control algorithm 14, the digital / analog converter 15, the linkage 24, the output stage 16, the injection pump 17, the analog / digital converter 19 and the linkage 20 the control path of the injection pump 17, the negative input signal of the link 20 representing the actual control path, the positive input signal, however, the target control path.
  • a second control loop which is superimposed on the first control loop, consists of the pedestrian 10, the analog / digital converter 11, the link 22, the first control algorithm 12, the limitation 13, the first control loop and the analog / digital converter 21.
  • the speed N of the internal combustion engine 18 is regulated in this second control loop.
  • the negative input signal of link 22 is the actual speed, the positive one. Input signal, however, by a target speed of the internal combustion engine.
  • the two control algorithms 12 and 14 have the task, depending on their differential input signal, of forming output signals which ensure optimal behavior of the internal combustion engine.
  • the task of the limitation 13 is to adapt the target signal for the control path to the mechanical properties of the injection pump 17.
  • the analog / digital or digital / analog converters 11, 15, 19 and 21 each establish the connection between the digitally operating microprocessor 25 and the analog peripheral devices.
  • the coupling circuit 23 acts with regard to the described first control circuit as a negative feedback of the control system consisting of the output stage 16 and the injection pump 17.
  • the coupling circuit 23 is completely independent of the microprocessor 25 and is normally constructed in analog circuit technology. It is particularly advantageous to implement the coupling circuit 23 as a differentiating element. In total, this creates a first control loop with respect to the control path RW of the injection pump, in which a parameter can be freely determined in addition to the control algorithm by means of a differentiating negative feedback. Furthermore, the first control loop is overlaid by a second control loop with respect to the speed N of the internal combustion engine.
  • the switching device 26 changes to its closed switching state according to the invention.
  • This can e.g. can be achieved in that a relay is used as the switching device 26 which is only in its active, that is to say open, state when the supply voltage for the microprocessor 25 is present, and which therefore closes automatically in the event of a power failure.
  • the output signal of the pedestrian 10 is switched directly to the link 24 and thus replaces the output signal of the digital / analog converter 15 which is missing due to the power failure , which consists of the pedals 10, the closed switching device 26, the link 24, the output stage 16, the injection pump 17 and the coupling circuit 23.
  • the power failure which consists of the pedals 10, the closed switching device 26, the link 24, the output stage 16, the injection pump 17 and the coupling circuit 23.
  • the coupling circuit 23 With a suitable dimensioning, in particular of the coupling circuit 23, it is then possible with the aid of this simple control circuit to ensure that the internal combustion engine operates at least temporarily and satisfactorily.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP86107566A 1985-07-02 1986-06-04 Regelanordnung für eine Brennkraftmaschine Expired - Lifetime EP0207316B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3523535 1985-07-02
DE19853523535 DE3523535A1 (de) 1985-07-02 1985-07-02 Regelanordnung fuer eine brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP0207316A2 EP0207316A2 (de) 1987-01-07
EP0207316A3 EP0207316A3 (en) 1988-01-20
EP0207316B1 true EP0207316B1 (de) 1990-09-12

Family

ID=6274697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86107566A Expired - Lifetime EP0207316B1 (de) 1985-07-02 1986-06-04 Regelanordnung für eine Brennkraftmaschine

Country Status (3)

Country Link
EP (1) EP0207316B1 (ja)
JP (1) JPS6223550A (ja)
DE (2) DE3523535A1 (ja)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4025847A1 (de) * 1990-08-16 1992-02-20 Bosch Gmbh Robert System zur regelung eines stellwerks in einem kraftfahrzeug

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3130094A1 (de) * 1981-07-30 1983-02-17 Robert Bosch Gmbh, 7000 Stuttgart Notsteuersystem fuer eine diesel-brennkraftmaschine
JPS58144651A (ja) * 1982-02-22 1983-08-29 Isuzu Motors Ltd エンジン制御装置
DE3235345A1 (de) * 1982-09-24 1984-03-29 Robert Bosch Gmbh, 7000 Stuttgart Steuereinrichtung fuer ein kraftstoffzumesssystem einer diesel-brennkraftmaschine
DE3238191A1 (de) * 1982-10-15 1984-04-19 Robert Bosch Gmbh, 7000 Stuttgart Notsteuereinrichtung fuer kraftstoffzumesssystem
DE3242317A1 (de) * 1982-11-16 1984-05-17 Robert Bosch Gmbh, 7000 Stuttgart Messeinrichtung an einer brennkraftmaschine zur staendigen erfassung von betriebsparametern
JPS59190442A (ja) * 1983-04-11 1984-10-29 Nissan Motor Co Ltd 車両用アクセル制御装置

Also Published As

Publication number Publication date
EP0207316A2 (de) 1987-01-07
DE3523535A1 (de) 1987-01-15
DE3674083D1 (de) 1990-10-18
JPS6223550A (ja) 1987-01-31
EP0207316A3 (en) 1988-01-20

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