EP1475527A2 - Verfahren zum Betreiben einer Brennkraftmaschine bei Störung der Erfassung des Kurbelwellenwinkels - Google Patents
Verfahren zum Betreiben einer Brennkraftmaschine bei Störung der Erfassung des Kurbelwellenwinkels Download PDFInfo
- Publication number
- EP1475527A2 EP1475527A2 EP04101220A EP04101220A EP1475527A2 EP 1475527 A2 EP1475527 A2 EP 1475527A2 EP 04101220 A EP04101220 A EP 04101220A EP 04101220 A EP04101220 A EP 04101220A EP 1475527 A2 EP1475527 A2 EP 1475527A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- injection
- internal combustion
- combustion engine
- processing unit
- fuel
- 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.)
- Granted
Links
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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
- F02D41/009—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
- 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
- F02D41/222—Safety or indicating devices for abnormal conditions relating to the failure of sensors or parameter detection devices
-
- 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
- F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
-
- 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
- F02D2041/389—Controlling fuel injection of the high pressure type for injecting directly into the cylinder
-
- 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
- F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
- F02D41/401—Controlling injection timing
Definitions
- the invention initially relates to a method for operating an internal combustion engine in which fuel over at least one injector in at least one Comes into the combustion chamber, in which an actuator Injector based on at least one Injection information is triggered, which is generated in stored in a memory, and by a processing unit is called, which results in a control command generated, and in which a malfunction in the detection of the Angular position of a crankshaft detected and at If a fault is detected, auxiliary measures are taken, which deleting at least part of the Include injection information.
- the invention also relates to a computer program electrical storage medium for a control and / or Control device of an internal combustion engine, a control and / or Control device for an internal combustion engine, and a Internal combustion engine, in particular for a motor vehicle, with a control and / or regulating device.
- a method of the type mentioned is from the market known. It occurs in internal combustion engines with direct fuel injection used where the fuel of injectors directly into the combustion chambers is injected.
- the fuel injectors are equipped with piezo actuators that position can influence a valve element. With the known Injection (or Injections) at a certain angular position of the Crankshaft.
- the desired start of injection becomes one Time (“static interrupt") calculated that one certain angular distance before a certain Angle position of the crankshaft corresponds, and that desired injection end is at a time (dynamic interrupt ") computed by a particular Time interval before the start of injection corresponds.
- the calculated data are stored in a memory.
- a The computing unit continuously records the current angular position the crankshaft and generated at the calculated Control commands corresponding to angular positions.
- the object of the present invention is a method of the type mentioned at the outset so that the Safety when operating the internal combustion engine in the event a fault in the detection of the angular position of the Crankshaft is guaranteed even more reliably.
- This task is initiated in a procedure mentioned type in that the relief measures include that all involve an injection start Injection information is deleted and on Injection end command for the actuator generated and executed becomes.
- the basis for this is the fact that the injection information relating to the start of injection to be deleted. However, if there is no injection information more can be obtained from the processing unit cannot be converted into commands. So it becomes on the one hand prevents that during the missing Synchronization commands are executed and it will on the other hand, prevents recovery the synchronization of "old" injection information are processed.
- the commands are "deactivated", so that the processing unit in a safe state is transferred.
- Processing unit is not initialized, it is in any case an injection command for the actuator Fuel injector generated and executed so the fuel injection through the Fuel injector is forcibly stopped as soon as a loss of synchronization was detected. This can cause the injection to end earlier than originally intended; in terms of However, this is operational reliability of the internal combustion engine less critical than too much fuel.
- the relief measures include that End of injection commands generated for all actuators and be issued. If a selection of the next to be controlled actuator, this reduces the required processing effort.
- a preferred development of the invention provides that in a first Processing unit is recognized whether a malfunction in the Detection of the angular position of the crankshaft is present, and that the first processing unit a second, faster working as the first processing unit Processing unit instructs the relief measures perform. This shortens the response time and the operational safety of the internal combustion engine again improved.
- the at least one injection end command is carried out in a further embodiment of the method according to the invention back into normal operation returned.
- the Generated injection information as usual and stored, and commands based thereon generated and executed.
- the special mode with shortened or whole failing fuel injections is therefore very low just before, so a corresponding process the comfort not or at least when the internal combustion engine is operating not significantly restricted.
- the second Processing unit of the first processing unit notifies you when the relief efforts are completed, and that the first processing unit is the second Processing unit then instructs again with one To continue normal operation. This is easy too program, and the second one can be the one in the Carry out tasks intended for normal operation.
- a preferred embodiment of this invention The procedure provides that if the relief measures at least with a certain frequency in succession be carried out in an internal combustion engine Security status is brought.
- This security state can consist, for example, that the Internal combustion engine is switched off. This will make the Operational reliability of the internal combustion engine increased because one successive implementation of said Aid measures indicate a serious mistake of the angular position of the crankshaft.
- an internal combustion engine carries this overall Reference number 10. It is used in a motor vehicle (not shown) used. For the sake of clarity are special in Figure 1 only in the present case relevant components of the internal combustion engine 10 shown.
- the internal combustion engine 10 includes combustion chambers 12, into which the fuel directly from fuel injectors 14 is injected. These are on a fuel rail 16 ("rail") connected, in the fuel is stored under high pressure.
- the Fuel rail 16 is from a high pressure fuel supply 18 fed. They are driven Fuel injectors 14 from a control and Control device 20.
- the angle encoder wheel 24 includes a series of donor teeth 28 on its Circumferential surface, which when the angle sensor 26 is swiped past a signal change in the output signal of the angle sensor 26 cause.
- a gap 30 leads to a changed signal of the angle sensor 26 and enables the assignment of Signal of the angle sensor 26 to a certain Angular position of the crankshaft 22.
- the angular position the camshaft is detected. This serves among other things in addition, in a four-stroke internal combustion engine in which the Crankshaft two turns during a working cycle However, camshaft only makes one turn Make the angular position of the crankshaft clear.
- the angle sensor 26 supplies its signals to the control and Control device 20. This also receives signals from a pressure sensor 32 which detects the pressure in the fuel rail 16 recorded. A desired torque is given the control and regulating device 20 from a pedal sensor 34 transmitted, which taps the position of an accelerator pedal 36.
- the fuel injectors 14 each include a valve element (not visible), which in the present Embodiment of a piezo actuator (also not visible) from a closed to an open Position and can be moved back. To one To open fuel injector 14, the Piezo actuator charged by applying a voltage to the Close fuel injector 14, so the Injection of fuel into a combustion chamber 12 the piezo actuator is discharged again.
- a CPU 38 receives the signals of the Pedal sensor 34 and the pressure sensor 32. Depending on these signals are processed by the CPU 38 in a static Interrupt the start of control, i.e. the time from which the piezo actuator of the fuel injection device 14 is loaded. This is shown in FIG. 3 referenced, in the course of a control voltage U for a pre-injection, reference numeral 40 and the course a control voltage U for a main injection Reference number 42 carries.
- the start of pre-injection 40 loading is shown in a static interrupt 44, in the present case Embodiment at 138 ° VOT, that for the Main injection 42 in a static interrupt 46, in present embodiment set at 78 ° VOT.
- a static interrupt 44 Shortly before the actual injection is then carried out in one dynamic interrupt 48a or 48b, for example 400 ⁇ s before that defined in static interrupt 44
- Start of control in CPU 38 the control duration or the start of the unloading process is calculated.
- Set the values for the start and end of charging Injection information, which is stored in a parameter RAM 50 are filed.
- a TPU 52 which has a higher process speed than the CPU 38, processes the signals of the Angle sensor 26 with which the angular position of the Crankshaft 22 is detected.
- a query is made in a block 60 as to whether there is proper information about the angular position of the crankshaft 22, ie whether the "synchronization" is in order. If a loss of synchronization is determined, the answer in block 60 is a "no".
- the TPU 52 is then switched to a special mode in block 62. In this special mode of the TPU, which is represented in FIG. 4 by a dashed box with the reference number 64, all the injection information EI A relating to an injection start and stored in the parameter RAM 50 is deleted by the TPU 52. Accordingly, corresponding commands can no longer be generated and executed in the TPU 52 until new injection information is again available in the parameter RAM 50.
- This special mode of the TPU 52 also includes that 14 injection end commands EB E are generated and executed for all piezo actuators of all fuel injection devices. This means that just open fuel injection devices 14 are immediately closed by discharging the corresponding piezo actuator.
- the CPU 38 now receives feedback from the TPU 52 that the piezo actuators of all fuel injection devices 14 are discharged. This feedback is queried in the CPU 38 in a block 66. If the answer in block 66 is "yes", in block 67 the TPU 52 is switched back into a normal mode by the CPU 38, in which, assuming correct synchronization of the angular position of the crankshaft 22, it generates loading commands EB A and unloading commands EP E and executes (block 68). The method ends in end block 70.
- Figure 5 shows enlarged the voltage profile in the pilot 40 and the main injection 42 of Figure 3, during normal operation of the internal combustion engine 10, so with proper synchronization of the signal of the angle sensor 26.
- Figure 6 shows the same case, in a loss of synchronization of the date on t sv during of the pre-injection 40. In this case, the execution of the method shown in FIG. 4 leads to the immediate termination of the pre-injection 40. A main injection does not take place in this case. Without these measures, there would be a risk that the pilot injection would take significantly longer than desired, which is indicated in FIG. 6 by a dotted line.
- TPU 52 from the CPU 38 several times in succession is instructed to switch to special mode 64 this is an indication of not just a short-term, but longer-lasting and therefore serious errors.
- the internal combustion engine 10 from the control device 20 brought into a security state, for example off.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
- Figur 1
- eine schematische Darstellung einer Brennkraftmaschine mit Kraftstoff-Einspritzvorrichtung und einem Steuer- und Regelgerät;
- Figur 2
- ein Ablaufschema, welches verschiedene Einheiten zeigt, welche bei der Ansteuerung der Kraftstoff-Einspritzvorrichtungen von Figur 1 verwendet werden;
- Figur 3
- ein Diagramm, in dem die Ansteuerspannung eines Piezoaktors der Kraftstoff-Einspritzvorrichtung von Figur 2 über der Winkelstellung einer Kurbelwelle der Brennkraftmaschine von Figur 1 aufgetragen ist;
- Figur 4
- ein Ablaufschema zur Erläuterung eines Verfahrens zum Betreiben der Brennkraftmaschine von Figur 1;
- Figur 5
- ein Diagramm, welches einen vergrößerten Ausschnitt des Diagramms von Figur 3 darstellt; und
- Figur 6
- ein Diagramm ähnlich Figur 5, bei einer erkannten Störung bei der Erfassung der Winkelstellung der Kurbelwelle der Brennkraftmaschine von Figur 1.
Claims (10)
- Verfahren zum Betreiben einer Brennkraftmaschine (10), bei dem Kraftstoff über mindestens eine Einspritzvorrichtung (14) in mindestens einen Brennraum (12) gelangt, bei dem ein Aktor der Einspritzvorrichtung (14) auf der Basis mindestens einer Einspritzinformation (EIA, EIE) angesteuert wird, welche generiert, in einem Speicher (50) abgelegt, und von einer Verarbeitungseinheit abgerufen wird, welche hieraus einen Ansteuerbefehl (EBA, EBE) generiert, und bei dem eine Störung bei der Erfassung der Winkelstellung einer Kurbelwelle (22) erkannt und bei einer erkannten Störung Hilfsmaßnahmen ergriffen werden, welche das Löschen mindestens eines Teils der Einspritzinformationen (EIA) umfassen, dadurch gekennzeichnet, dass die Hilfsmaßnahmen (64) umfassen, dass alle einen Einspritzanfang betreffenden Einspritzinformationen (EIA) gelöscht werden und ein Einspritzende-Befehl (EBE) für den Aktor generiert und ausgeführt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass bei einer Brennkraftmaschine (10) mit mehreren Kraftstoff-Einspritzvorrichtungen (14) die Hilfsmaßnahmen (64) umfassen, dass Einspritzende-Befehle (EBE) für alle Aktoren generiert und ausgegeben werden.
- Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass in einer ersten Verarbeitungseinheit (38) erkannt wird, ob eine Störung bei der Erfassung der Winkelstellung der Kurbelwelle (22) vorliegt, und dass die erste Verarbeitungseinheit (38) eine zweite, schneller als die erste Verarbeitungseinheit (38) arbeitende Verarbeitungseinheit (52) anweist, die Hilfsmaßnahmen (64) durchzuführen.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass dann, wenn der mindestens eine Einspritzende-Befehl (EBE) ausgeführt ist, wieder in einen Normalbetrieb (68) zurückgehrt wird.
- Verfahren nach den Ansprüchen 3 und 4, dadurch gekennzeichnet, dass die zweite Verarbeitungseinheit (52) der ersten Verarbeitungseinheit (38) mitteilt, wenn die Hilfsmaßnahmen (64) abgeschlossen sind, und dass die erste Verarbeitungseinheit (38) die zweite Verarbeitungseinheit (52) dann anweist (67), wieder mit einem Normalbetrieb (68) fortzufahren.
- Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass dann, wenn die Hilfsmaßnahmen (62) mindestens mit einer bestimmten Häufigkeit hintereinander durchgeführt werden, die Brennkraftmaschine (10) in einen Sicherheitszustand gebracht wird.
- Computerprogramm, dadurch gekennzeichnet, dass es zur Anwendung in einem Verfahren nach einem der vorhergehenden Ansprüche programmiert ist.
- Elektrisches Speichermedium für ein Steuer- und/oder Regelgerät (20) einer Brennkraftmaschine (10), dadurch gekennzeichnet, dass auf ihm ein Computerprogramm zur Anwendung in einem Verfahren der Ansprüche 1 bis 6 abgespeichert ist.
- Steuer- und/oder Regelgerät (20) für eine Brennkraftmaschine (10), dadurch gekennzeichnet, dass es zur Anwendung in einem Verfahren nach einem der Ansprüche 1 bis 6 programmiert ist.
- Brennkraftmaschine (10), insbesondere für ein Kraftfahrzeug, mit einem Steuer- und/oder Regelgerät (20), dadurch gekennzeichnet, dass es zur Anwendung in einem Verfahren nach einem der Ansprüche 1 bis 6 programmiert ist.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2003120284 DE10320284A1 (de) | 2003-05-07 | 2003-05-07 | Verfahren zum Betreiben einer Brennkraftmaschine |
| DE10320284 | 2003-05-07 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1475527A2 true EP1475527A2 (de) | 2004-11-10 |
| EP1475527A3 EP1475527A3 (de) | 2004-12-15 |
| EP1475527B1 EP1475527B1 (de) | 2006-06-14 |
Family
ID=32981258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20040101220 Expired - Lifetime EP1475527B1 (de) | 2003-05-07 | 2004-03-24 | Verfahren zum Betreiben einer Brennkraftmaschine bei Störung der Erfassung des Kurbelwellenwinkels |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1475527B1 (de) |
| DE (2) | DE10320284A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8358107B2 (en) | 2007-12-31 | 2013-01-22 | Intel Corporation | Bidirectional power management techniques |
| KR101619633B1 (ko) * | 2014-11-06 | 2016-05-11 | 현대오트론 주식회사 | 솔레노이드 밸브를 구동시키기 위한 파형 신호 출력 장치 및 방법 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19735721A1 (de) * | 1997-08-18 | 1999-02-25 | Bayerische Motoren Werke Ag | Verfahren und Vorrichtung zur Steuerung der Kraftstoff-Einspritzmenge für eine Brennkraftmaschine in einem Fahrzeug |
| DE10043756C2 (de) * | 2000-09-05 | 2002-11-28 | Siemens Ag | Verfahren zur Festlegung des Einspritzzeitpunkts bei einer Einspritzanlage für eine Brennkraftmaschine |
| 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 |
| JP3763470B2 (ja) * | 2002-06-24 | 2006-04-05 | 三菱電機株式会社 | 内燃機関制御装置 |
-
2003
- 2003-05-07 DE DE2003120284 patent/DE10320284A1/de not_active Withdrawn
-
2004
- 2004-03-24 DE DE200450000740 patent/DE502004000740D1/de not_active Expired - Lifetime
- 2004-03-24 EP EP20040101220 patent/EP1475527B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1475527A3 (de) | 2004-12-15 |
| DE10320284A1 (de) | 2004-12-02 |
| DE502004000740D1 (de) | 2006-07-27 |
| EP1475527B1 (de) | 2006-06-14 |
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