EP0145887A2 - Système de secours pour appareil de dosage de carburant - Google Patents

Système de secours pour appareil de dosage de carburant Download PDF

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Publication number
EP0145887A2
EP0145887A2 EP84112612A EP84112612A EP0145887A2 EP 0145887 A2 EP0145887 A2 EP 0145887A2 EP 84112612 A EP84112612 A EP 84112612A EP 84112612 A EP84112612 A EP 84112612A EP 0145887 A2 EP0145887 A2 EP 0145887A2
Authority
EP
European Patent Office
Prior art keywords
emergency
pulse generator
microprocessor
driver stage
fuel metering
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Withdrawn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
EP84112612A
Other languages
German (de)
English (en)
Other versions
EP0145887A3 (fr
Inventor
Herbert Dipl.-Ing. Arnold
Michael Dipl.-Ing. Horbelt
Berthold Dipl.-Ing. Seibel
Hans-Peter Dipl.-Ing. Ströbele
Peter Dipl.-Ing. Werner
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 EP0145887A2 publication Critical patent/EP0145887A2/fr
Publication of EP0145887A3 publication Critical patent/EP0145887A3/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Withdrawn legal-status Critical Current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
    • F02D41/24—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

Definitions

  • the invention relates to an emergency control system for fuel metering devices according to the preamble of the main claim.
  • Microprocessors are generally characterized by high operational reliability. However, the high level of operational safety can no longer be guaranteed if the microprocessors work in an environment heavily loaded with electrical interference. This is the case with microprocessors, for example given that are used in motor vehicles. If the control of the fuel metering device in motor vehicles fails or fails, a safe operating state of the motor vehicle is no longer guaranteed. In such a case, an emergency function of the fuel metering device and thus of the motor vehicle must be ensured so that at least a provisional continuation is possible. Stopping the motor vehicle in the event of a fault in the controlling microprocessor would be associated with high costs for the user in almost every case and would lead to consequential damage.
  • An example of this is the use of the microprocessor in connection with the drive of a tractor and the occurrence of an error, especially when used in difficult terrain.
  • Another example is the failure of a microprocessor that controls the engine of a passenger car that is currently traveling in the fast lane on a country road. For safety reasons, it must therefore be possible to carry out a provisional onward journey and a journey to the nearest workshop, for example.
  • a monitoring device for program-controlled devices is known from DE-OS (R. 5264 of the applicant), in which at least one control pulse can be removed during each program run and in which a new program run is triggered if there is no control pulse.
  • This known monitoring device differentiates occurring errors in the program sequence according to whether they have been caused by short-term malfunctions or by system failures and thus creates a criterion for actuation an emergency switch.
  • a program sequence stopped or faulty due to a short-term error is properly started again by resetting to the start of the program. The user of the system can then decide whether he wants to put an emergency function of the program-controlled device into operation or not. In the known device, however, no automatic control of an emergency run is provided.
  • an emergency control system for a diesel internal combustion engine is known from DE-OS (R. 7197 of the applicant), in which emergency control circuit arrangements are assigned to an associated signal processing unit and / or the associated control regulator, which can be switched on automatically or manually.
  • the accelerator pedal position signal can be passed on indirectly or directly to the signal processing unit.
  • a prerequisite for this system, however, is that the microcomputer itself is still intact, while one or the other sensor provided for controlling the microcomputer may be defective.
  • the emergency control system according to the invention with the characterizing features of the main claim has the advantage that an emergency operation is possible even in the event of a total failure of the microprocessor and / or the sensors controlling the microprocessor. This is caused by the fact that in the event of a malfunction or a failure of the microprocessor, an autonomous emergency pulse generator controls the Fuel metering takes over. Another advantage is that the emergency control system according to the invention can be implemented with extremely little hardware.
  • Figure 1 shows a block diagram of the essential components of the system according to the invention
  • Figure 2 shows a graphic representation of pulses occurring in the system.
  • a microprocessor 11 is provided for controlling a fuel metering device 12.
  • a circuit part 13 is connected between the microprocessor 11 and the fuel metering device 12.
  • a speed sensor 14 and a switch 15 are also connected to inputs of this circuit part 13.
  • the switch 15 can be, for example, an idle, full-load switch of the fuel metering device 12.
  • the speed sensor 14 can be present in the ignition device, but a separate tachometer generator can also be used.
  • the circuit part 13 comprises a reset pulse generator 16, a timing element 17, an emergency operation pulse generator 18 and a driver stage 19.
  • a switching device 21 is integrated in the driver stage 19.
  • the timing element 17 can optionally be implemented by an external circuit of the circuit part 13, wherein the time can be controlled in a switchable manner.
  • An output line 22 leads from the microprocessor 11 to the reset pulse generator 16, a further output line 23 leads to the switching device 21. From the speed sensor 14 an output line 24 leads to the emergency operation pulse generator 18.
  • An output line 25 leads from the switch 15 to the timing element 17.
  • the reset pulse generator 16 is connected via an output line 26 an input of the microprocessor 11, via an output line 27 to the fuel metering device 12 and via an output line 28 to the switching device 21.
  • the timing element 17 is connected to the emergency operation pulse generator 18 via a line 29.
  • the output of the emergency operation pulse generator 18 is via a line 31 to the switching device 21 and the output of the driver stage 19 connected to the fuel metering device 12 via a line 32.
  • the top row shows possible output signals from the microprocessor 11 which can occur on the connecting line 22 as a function of the time t. Below this, the pulses that may occur on line 26 are recorded. Finally, the pulses are given that can run on the connecting line 27.
  • a program usually runs cyclically in the microprocessor 11 and is used, among other things, to control the fuel metering device 12. Via the connecting line 23, pulses are given to the fuel metering device 12 via the driver stage 19 during the program run depending on the speed of the internal combustion engine.
  • the switching device 21 is set so that the pulses from the line 23 to the driver stage 19 and thus can reach the fuel metering device 12 via the line 32.
  • a control pulse 122 is emitted after each program cycle, which is also sent to the reset pulse generator 16 via the connecting line 22. As long as the pulses 122 arrive at the reset pulse generator 16 at the predetermined regular intervals, the output 26 of the reset pulse generator remains constantly at a high potential.
  • the reset pulse generator 16 determines in a predetermined manner possible time interval 126 reset pulses 226.
  • the reset pulses 226 are supplied to the microprocessor 11 and are intended to cause the microprocessor 11 to restart a program cycle.
  • the reset pulses 226 are emitted until the microprocessor 11 operates properly again and thus also emits control pulses 122 again.
  • the emergency running pulse generator is a generator in the manner of a monostable multivibrator, triggered by the ignition pulses.
  • the pulse duration of the emergency running pulses is determined by the timer 17.
  • the timing element 17 measures the emergency running pulses so that they are approximately the same as the usual injection pulses.
  • the timing element 17 can be switched, for example, by an idle full-load switch in accordance with the load on the associated internal combustion engine.
  • the number of emergency pulses is determined by the speed sensor 14 via line 24.
  • the fuel metering device 12 is thus supplied with control pulses from the emergency operation pulse generator 18 via the line 32, the driver stage 19, the switching device 21 and the line 31.
  • the frequency of the emergency running pulses is proportional to the speed of the internal combustion engine, the duration of the emergency running pulses depends on
  • the system switches to the limp home function when a single control pulse from the microprocessor fails.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Debugging And Monitoring (AREA)
EP84112612A 1983-11-24 1984-10-19 Système de secours pour appareil de dosage de carburant Withdrawn EP0145887A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19833342379 DE3342379A1 (de) 1983-11-24 1983-11-24 Notsteuersystem fuer kraftstoffzumesseinrichtungen
DE3342379 1983-11-24

Publications (2)

Publication Number Publication Date
EP0145887A2 true EP0145887A2 (fr) 1985-06-26
EP0145887A3 EP0145887A3 (fr) 1986-01-29

Family

ID=6215068

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112612A Withdrawn EP0145887A3 (fr) 1983-11-24 1984-10-19 Système de secours pour appareil de dosage de carburant

Country Status (4)

Country Link
US (1) US4577605A (fr)
EP (1) EP0145887A3 (fr)
JP (1) JPS60132041A (fr)
DE (1) DE3342379A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003044A1 (fr) * 1985-11-07 1987-05-21 Robert Bosch Gmbh Systeme d'ordinateur a deux processeurs
EP1387078A1 (fr) * 2001-03-19 2004-02-04 Chongqing Lifan Industry (Group) Co., Ltd. Systeme de commande electrique de carburant pour motocyclette

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6461830A (en) * 1987-08-31 1989-03-08 Aisin Seiki Protecting device for automobile microcomputer
US4889097A (en) * 1988-02-29 1989-12-26 Fred Bevill Electronic fuel control device and method
JP2813022B2 (ja) * 1990-03-12 1998-10-22 三菱電機株式会社 車両用制御装置
JPH05340295A (ja) * 1992-06-09 1993-12-21 Toyota Motor Corp 多気筒内燃機関の制御装置
DE4331666C2 (de) * 1993-09-17 2001-07-05 Kroll Fahrzeugbau Umwelt Verfahren und Anordnung zum Steuern von Einrichtungen mit Überwachungssensoren
JP3482675B2 (ja) * 1994-03-04 2003-12-22 トヨタ自動車株式会社 内燃機関の安全制御装置
DE10139616B4 (de) * 2001-08-11 2010-12-09 Robert Bosch Gmbh Steuerkreis mit Redundanzfunktion

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027355A2 (fr) * 1979-10-09 1981-04-22 Ford Motor Company Limited Système de commande de l'injection de carburant
DE2945543A1 (de) * 1979-11-10 1981-05-21 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum steuern von betriebsparameterabhaengigen und sich wiederholenden vorgaengen fuer brennkraftmaschinen
EP0065221A2 (fr) * 1981-05-06 1982-11-24 Hitachi, Ltd. Appareil de commande de moteur à combustion interne

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3834361A (en) * 1972-08-23 1974-09-10 Bendix Corp Back-up fuel control system
US4255789A (en) * 1978-02-27 1981-03-10 The Bendix Corporation Microprocessor-based electronic engine control system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027355A2 (fr) * 1979-10-09 1981-04-22 Ford Motor Company Limited Système de commande de l'injection de carburant
DE2945543A1 (de) * 1979-11-10 1981-05-21 Robert Bosch Gmbh, 7000 Stuttgart Einrichtung zum steuern von betriebsparameterabhaengigen und sich wiederholenden vorgaengen fuer brennkraftmaschinen
EP0065221A2 (fr) * 1981-05-06 1982-11-24 Hitachi, Ltd. Appareil de commande de moteur à combustion interne

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003044A1 (fr) * 1985-11-07 1987-05-21 Robert Bosch Gmbh Systeme d'ordinateur a deux processeurs
EP1387078A1 (fr) * 2001-03-19 2004-02-04 Chongqing Lifan Industry (Group) Co., Ltd. Systeme de commande electrique de carburant pour motocyclette
EP1387078A4 (fr) * 2001-03-19 2007-03-14 Chongqing Lifan Ind Group Co Systeme de commande electrique de carburant pour motocyclette

Also Published As

Publication number Publication date
EP0145887A3 (fr) 1986-01-29
JPS60132041A (ja) 1985-07-13
US4577605A (en) 1986-03-25
DE3342379A1 (de) 1985-06-05

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18D Application deemed to be withdrawn

Effective date: 19880502

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
RIN1 Information on inventor provided before grant (corrected)

Inventor name: HORBELT, MICHAEL, DIPL.-ING.

Inventor name: ARNOLD, HERBERT, DIPL.-ING.

Inventor name: SEIBEL, BERTHOLD, DIPL.-ING.

Inventor name: WERNER, PETER, DIPL.-ING.

Inventor name: STROEBELE, HANS-PETER, DIPL.-ING.