EP0647290A1 - Maschinensteuerverfahren mit ersatzfunktion für ein fehlerhaftes wellenwinkelsignal - Google Patents
Maschinensteuerverfahren mit ersatzfunktion für ein fehlerhaftes wellenwinkelsignalInfo
- Publication number
- EP0647290A1 EP0647290A1 EP94912448A EP94912448A EP0647290A1 EP 0647290 A1 EP0647290 A1 EP 0647290A1 EP 94912448 A EP94912448 A EP 94912448A EP 94912448 A EP94912448 A EP 94912448A EP 0647290 A1 EP0647290 A1 EP 0647290A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- signals
- angle mark
- counter
- transmitter
- counting means
- 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- Withdrawn
Links
Classifications
-
- 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
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
-
- 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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- 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
- F02P15/00—Electric spark ignition having characteristics not provided for in, or of interest apart from, groups F02P1/00 - F02P13/00 and combined with layout of ignition circuits
- F02P15/008—Reserve ignition systems; Redundancy of some ignition devices
-
- 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
- F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
- F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
- F02P7/077—Circuits therefor, e.g. pulse generators
- F02P7/0775—Electronical verniers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/489—Digital circuits therefor
Definitions
- the invention is based on a method according to the type of the main claim.
- a method for triggering processes dependent on the angular position of a rotating part is already known from DE-OS 33 07 833. It describes a device for displaying and / or storing errors in sensor arrangements on internal combustion engines.
- a speed sensor, a reference mark sensor and a phase signal sensor are included as components in the sensor arrangement.
- the encoder arrangement is checked during operation of the internal combustion engine. In the event of a deviation from the prescribed sequence and / or prescribed intervals of the transmitter signals, an error signal is generated which is stored and / or fed to a display device.
- the main claim has the advantage that even in the event of failure of the encoder, which detects the rotary movement of the rotating part, an emergency operation of the control is maintained.
- the method for controlling an internal combustion engine in a motor vehicle is used in concrete terms, it is thus possible for the vehicle to be ready to drive even if the encoder that detects the rotary movement of the crankshaft fails remains so that the next workshop can still be reached on your own.
- Emergency operation takes place in such a way that large parts of the control program can be retained, so that the effort for programming the microcomputer also remains low. This also means that there is no unnecessarily high additional storage effort. Circuitry changes are not necessary for the implementation of emergency operation.
- the measures listed in the subclaims are possible through the measures listed in the subclaims.
- the chronological sequence of the signals of the second transmitter is recorded in a simple manner for later evaluation by the microcomputer.
- the measures according to claim 3 make it possible to exactly replicate the angle mark signals to be simulated, while at the same time the computational effort remains low.
- the measures according to claim 4 enable a simple test method for testing the correct occurrence of angle mark signals, which can also be implemented by a computer program, so that no additional circuitry is required.
- FIG. 1 shows a block diagram of an inventive control device for an internal combustion engine
- FIG. 2 shows a flowchart according to the invention for a main program for execution in the microcomputer of an engine control unit
- FIG. 3 shows a signal diagram for the control of the internal combustion engine during one revolution of the camshaft
- FIG. 4 shows a flow chart for an emergency operation program according to the invention for processing in the microcomputer of the engine control unit
- Figure 5 a Flowchart for a first interrupt program for processing in the microcomputer of the engine control unit
- FIG. 6 shows a flowchart for a second interrupt program for processing from the microcomputer of the engine control unit.
- reference number 10 denotes an engine control unit of a motor vehicle.
- the mode of operation of a control device for controlling an internal combustion engine is well known from the prior art. For more details, see Bosch Technical Reports, Motronik, 1983.
- a microcomputer 11 is contained in the engine control unit 10.
- the microcomputer 11 has the usual structure with CPU, RAM, ROM and I / O units. For reasons of clarity, these components are not shown in detail.
- the timing signals of a clock generator 12 are fed to a time counter 13.
- the time counter 13 is connected to four registers 15 to 18.
- the registers 15 to 18 are also connected to an angle counter 14.
- Such registers have become known in the prior art under the term capture / compare module (see Intel manual 8XC196KR User's Manual, chapter 6, 1991).
- An output of the register 15 is connected to an input of the angle counter 14.
- the output of the register 15 is also also connected to the output of a signal conditioning circuit 22 provided externally to the microcomputer 11.
- An inductive transmitter 21 is connected on the input side to the signal conditioning circuit 22. The inductive transmitter 21 emits a signal each time an angle mark 20 of a rotating part 19 rotates. The signal is transformed into a square-wave signal by the signal conditioning circuit 22.
- the rotating part 19 is a gear that is attached to the crankshaft of the internal combustion engine. It points usually (60-2) teeth. For the sake of simplicity, however, only (8-1) teeth are shown in FIG.
- the output of register 16 is connected to an output stage 30.
- the output stage 30 is in turn connected to an ignition coil 27.
- the output of register 17 is connected to a further output stage 29.
- the output stage 29 is in turn connected to an injection valve 28.
- the output of register 18 is connected to a further signal conditioning circuit 26.
- An inductive transmitter 25 is connected to the signal conditioning circuit 26.
- the inductive sensor 25 detects the rotary movement of the camshaft of the internal combustion engine.
- a second rotating part 23 is attached to the camshaft.
- the rotating part 23 has a reference mark 24.
- the inductive transmitter 25 When the reference mark 24 rotates, the inductive transmitter 25 emits a signal which is transformed into a square-wave signal by the signal conditioning circuit 26. Furthermore, a load sensor 31 and a knock sensor 32 are connected to the microcomputer 11 of the engine control unit 10. Additional sensors, such as temperature sensors, can be connected to the control unit.
- the mode of operation of the arrangement is explained below with reference to the flow chart in FIG. 2.
- the main program of the microcomputer 11 is started in program step 40.
- the microcomputer 11 is initialized.
- the registers 15 and 18 are configured as a catch register for the time counter 13.
- the operating parameters are recorded.
- the angle counter 14 counts the rectangular pulses which are emitted by the signal processing circuit 22 when an angle mark 20 rotates on the inductive transmitter 21.
- the microcomputer 11 determines the angular position of the crankshaft of the internal combustion engine. Occurs on the connecting line from register 15 to the signal pacing circuit 22 has a rising or falling edge, the count of the time counter 13 is immediately recorded in the register 15.
- the register 15 then issues an interrupt signal to the CPU, not shown in detail.
- the CPU stores the value in register 15 in RAM for later evaluation purposes.
- the CPU finally calculates the speed of the internal combustion engine from the difference between two successive catch values.
- the microcomputer 11 calculates the load information of the internal combustion engine from the signal of the load sensor 31. For a knock control system which is not considered in detail here and which also influences the subsequent ignition angle calculation, the rotary movement of the camshaft is recorded. With a falling edge of the square wave signal from the
- Signal conditioning circuit 26 is output, the counter reading of the time counter 13 is collected in the register 18. Then an interrupt is also triggered. This value is transferred to RAM during the associated interrupt service routine.
- the microcomputer 11 On the basis of the captured value, the microcomputer 11 is able to carry out a cylinder recognition for the knock control also implemented in the microcomputer 11. The cylinder recognition based on a square wave signal from the
- Signal conditioning circuit 26 is based on the fact that the installation position of the reference mark 24 is known to the microcomputer 11 and corresponds to a specific angular position of the crankshaft.
- the microcomputer 11 After the operating parameter acquisition, the microcomputer 11 carries out a diagnosis of the acquired signals in program step 43. The diagnosis is based on a plausibility check of the signals from the individual encoders. The measured values obtained are compared with predetermined limit values. By comparison, whether after a single or multiple occurrence If a phase signal, which is emitted by the inductive transmitter 25 when the reference mark 24 rotates, a certain number of angle mark signals has occurred, the microcomputer 11 can determine whether a defect was present when the signals from the inductive transmitter 21 were detected. This question is answered in query 44 of the program.
- FIG. 3a The output of the ignition commands is shown in Figure 3.
- Figure 3a two successive phase signals are shown. The distance between the falling edges of the phase signals corresponds to a full revolution of the camshaft of the internal combustion engine.
- the register 15 is then reconfigured in program step 53.
- the input of the register 15 is reconfigured as an output.
- Register 15 is also reconfigured as a comparison register.
- the register 15 then works together with the time counter 13. In this operating mode, after incrementing the time counter 13, it compares whether the counter reading of the time counter 13 matches the value stored in the register 15. If this is the case, it switches the bit state at the output of register 15. These switching signals are thus also fed to the angle counter 14 via the connection between the output of the register 15 and the input of the counter 14.
- the emergency running program is then ended in program step 54 and the program step 45 for calculating the closing and ignition angles and injection times is continued.
- Program step 80 denotes the start of this interrupt program.
- program step 81 register 18 is read out and the content is stored in the RAM of microcomputer 11 for later evaluation purposes.
- Query 82 checks whether the emergency operation has already been triggered. If this is not the case, the interrupt program is ended in program step 87. If the limp-home mode had already been activated, the difference time for the next edges of simulated angle mark signals to be output takes place in program step 83.
- the speed of the crankshaft is determined from the difference between two previously stored, successive catch values of the register 18. This is possible because, as is known, the camshaft rotates at half the speed of rotation of the crankshaft.
- the microcomputer 11 calculates in advance in step 83 the value for the time between two successive edges of an angle mark signal to be simulated. This value is stored in the RAM of the microcomputer 11 in program step 84. The microcomputer 11 accesses this value several times during the emergency operation.
- step 85 the calculation of the target time for the next rising edge to be output of a first simulated angle mark signal takes place after the falling edge of the phase signal occurs.
- the microcomputer takes into account the current count of the time counter 13 and the time of occurrence of the falling edge of the last phase signal.
- Angle mark signal independently in accordance with the count of the time counter 13.
- query 71 checks whether the emergency operation has already been activated. This is done by reading out the RAM cell set in program step 52 of the emergency operation program. If the emergency operation was not yet activated, register 15, which acts as a catch register, is read out in program step 72 and the corresponding value is stored in RAM for later evaluation purposes. The interrupt program is then ended in program step 75. If the limp-home mode had already been activated, the target time of the next edge to be output for the model to be emulated is shown in program step 73
- Angle mark signal calculated. The calculation takes place in such a way that the value that was stored in the RAM of the microcomputer 11 in program step 84 of the interrupt program previously explained is added to the current counter reading of the counter 13. This value is entered in register 15 in program step 74. The interrupt program is then ended in program step 75.
- the signal diagram in emergency operation looks exactly like that shown in FIG. 3. Since the engine speed in emergency operation during two
- crankshaft revolutions are calculated only once, if the engine speed drops, it can happen that all (8-1) angle mark signals have already been output and the next phase interrupt occurs later. Likewise, if the speed increases, not all (8-1) angle mark signals have been simulated when the next phase interrupt occurs. In this case, the pending impulses can be issued very quickly in succession by special measures. Because of these dynamic effects (speed increase, speed decrease), it is advantageous to provide the rotating part 23 with further reference marks 24 so that a phase interrupt occurs, for example, every 90 ° crankshaft angle.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4313331 | 1993-04-23 | ||
DE4313331A DE4313331A1 (de) | 1993-04-23 | 1993-04-23 | Verfahren zur Auslösung von zur Winkellage eines rotierenden Teils abhängigen Vorgängen |
PCT/DE1994/000405 WO1994025749A1 (de) | 1993-04-23 | 1994-04-13 | Maschinensteuerverfahren mit ersatzfunktion für ein fehlerhaftes wellenwinkelsignal |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0647290A1 true EP0647290A1 (de) | 1995-04-12 |
Family
ID=6486211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94912448A Withdrawn EP0647290A1 (de) | 1993-04-23 | 1994-04-13 | Maschinensteuerverfahren mit ersatzfunktion für ein fehlerhaftes wellenwinkelsignal |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0647290A1 (de) |
KR (1) | KR950702284A (de) |
DE (1) | DE4313331A1 (de) |
WO (1) | WO1994025749A1 (de) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19810214B4 (de) * | 1998-03-10 | 2009-09-17 | Robert Bosch Gmbh | Verfahren zur Synchronisation einer mehrzylindrigen Brennkraftmaschine |
US6144914A (en) * | 1999-03-25 | 2000-11-07 | Caterpillar Inc. | Configurable speed timing interrupts |
DE19947098A1 (de) * | 1999-09-30 | 2000-11-09 | Siemens Ag | Verfahren zur Ermittlung der Kurbelwellenstellung |
EP1234108B1 (de) * | 1999-11-30 | 2005-02-16 | Siemens Aktiengesellschaft | Steuereinrichtung und steuerverfahren für eine brennkraftmaschine, steuereinheit für stellglieder einer brennkraftmaschine |
US6523523B2 (en) | 2000-11-13 | 2003-02-25 | Siemens Vdo Automotive Corporation | Camless engine with crankshaft position feedback |
JP3775220B2 (ja) * | 2000-12-27 | 2006-05-17 | 株式会社デンソー | 内燃機関用制御装置 |
DE10120799A1 (de) | 2001-04-27 | 2002-11-21 | Bosch Gmbh Robert | Verfahren zur Synchronisation einer Verbrennungskraftmaschine anhand der Winkellage eines rotierenden Teils |
DE10201166A1 (de) * | 2002-01-15 | 2003-07-24 | Bosch Gmbh Robert | Verfahren zum Überprüfen der Funktionsfähigkeit zweier Geber |
DE10204196B4 (de) | 2002-02-01 | 2011-07-07 | Robert Bosch GmbH, 70469 | Verfahren zum Ermitteln der Kurbelwellenstellung einer Brennkraftmaschine |
DE10243127B4 (de) * | 2002-09-17 | 2019-04-18 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Sensorvorrichtung zur Erfassung der Drehzahl eines Fahrzeugrades |
EP1426596B1 (de) * | 2002-11-28 | 2006-05-31 | STMicroelectronics S.r.l. | Architektur einer elektronischen Vorrichtung zum Ermitteln der Betriebsphase einer Brennkraftmaschine |
US7310574B2 (en) | 2002-11-28 | 2007-12-18 | Stmicroelectronics S.R.L. | Electronic architecture of an automatic system for driving an internal combustion engine |
DE102004029065A1 (de) | 2004-06-16 | 2006-01-26 | Siemens Ag | Kurbelwellensynchrone ERfassung analoger Signale |
DE102005047088B4 (de) * | 2005-09-30 | 2014-10-09 | Robert Bosch Gmbh | Verfahren zur Erzeugung eines simulierten Gebersignalverlaufs für eine Markierungslücke einer Geberscheibe |
DE102007024416B4 (de) * | 2007-05-25 | 2012-01-05 | Continental Automotive Gmbh | Verfahren und Einrichtung zum Ermitteln eines Drehparameters einer Kurbelwelle |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57101903A (en) * | 1980-12-17 | 1982-06-24 | Nissan Motor Co Ltd | Fail safe system of electronic control device |
US4502446A (en) * | 1981-12-10 | 1985-03-05 | Nissan Motor Company, Limited | Fail-safe system for automotive engine control system for fail-safe operation as crank angle sensor fails operation thereof and fail-safe method therefor, and detection of fault in crank angle sensor |
DE3307833C2 (de) * | 1983-02-19 | 1993-12-16 | Bosch Gmbh Robert | Verfahren zum Anzeigen und/oder Speichern von Fehlern von Geberanordnungen an Brennkraftmaschinen |
JPH0751936B2 (ja) * | 1988-11-02 | 1995-06-05 | 株式会社日立製作所 | エンジン制御装置 |
DE4005123A1 (de) * | 1990-02-17 | 1991-08-22 | Bosch Gmbh Robert | Zuendanlage fuer brennkraftmaschinen |
IT1245012B (it) * | 1991-01-29 | 1994-09-13 | Weber Srl | Sistema di identificazione delle fasi di un motore endotermico |
DE4141714C2 (de) * | 1991-12-18 | 2002-11-14 | Bosch Gmbh Robert | Steuersystem für eine Brennkraftmaschine |
-
1993
- 1993-04-23 DE DE4313331A patent/DE4313331A1/de not_active Withdrawn
-
1994
- 1994-04-13 EP EP94912448A patent/EP0647290A1/de not_active Withdrawn
- 1994-04-13 WO PCT/DE1994/000405 patent/WO1994025749A1/de not_active Application Discontinuation
- 1994-12-23 KR KR1019940704698A patent/KR950702284A/ko not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9425749A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE4313331A1 (de) | 1994-10-27 |
KR950702284A (ko) | 1995-06-19 |
WO1994025749A1 (de) | 1994-11-10 |
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