DE102010024401A1 - Internal combustion engine, has injection pumps that convey fuel into common rail, where rail has rail pressure sensor, which determines and transmits rail pressure to engine control device - Google Patents
Internal combustion engine, has injection pumps that convey fuel into common rail, where rail has rail pressure sensor, which determines and transmits rail pressure to engine control device Download PDFInfo
- Publication number
- DE102010024401A1 DE102010024401A1 DE102010024401A DE102010024401A DE102010024401A1 DE 102010024401 A1 DE102010024401 A1 DE 102010024401A1 DE 102010024401 A DE102010024401 A DE 102010024401A DE 102010024401 A DE102010024401 A DE 102010024401A DE 102010024401 A1 DE102010024401 A1 DE 102010024401A1
- Authority
- DE
- Germany
- Prior art keywords
- internal combustion
- combustion engine
- rail
- rail pressure
- injection
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/0265—Pumps feeding common rails
- F02M63/027—More than one high pressure pump feeding a single common rail
-
- 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
- F02D41/3809—Common rail control systems
- F02D41/3836—Controlling the fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/04—Fuel pressure pulsation in common rails
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/023—Means for varying pressure in common rails
- F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
- F02M63/0245—Means for varying pressure in common rails by bleeding fuel pressure between the high pressure pump and the common rail
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
- F02M63/023—Means for varying pressure in common rails
- F02M63/0235—Means for varying pressure in common rails by bleeding fuel pressure
- F02M63/025—Means for varying pressure in common rails by bleeding fuel pressure from the common rail
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- 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)
Abstract
Description
Gegenwärtig wird eine derartige Erkennung im Wesentlichen durch den persönlichen Eindruck des jeweiligen Fernfahrers bestimmt. Ist der Fahrer der Meinung, dass der Motor nicht mehr die volle Leistung bringt, so fährt er die nächste Werkstatt an, die dann mit einer Routineuntersuchung die vielfältigen Ursachen für zu geringe Leistung untersuchen müssen. Verfügt der Fahrer nicht über genügend Erfahrung, dann kann ein Unterlassen von Wartungsarbeiten zu einer Beschädigung der Brennkraftmaschine führen.At present, such recognition is essentially determined by the personal impression of the respective truck driver. If the driver feels that the engine is no longer able to perform at full capacity, he drives to the nearest garage, who then has to use a routine examination to investigate the many causes of underperformance. If the driver does not have enough experience, failure to perform maintenance may result in damage to the engine.
Es ist die Aufgabe der vorliegenden Erfindung, Schäden vorzubeugen und objektive Kriterien für den Fehlerfall zu schaffen.It is the object of the present invention to prevent damage and to provide objective criteria for the error case.
Die Aufgabe wird gelöst durch eine Vorrichtung nach Anspruch 1 und einem Verfahren nach Anspruch 5.The object is achieved by a device according to
Die Erfindung wird neben der Beschreibung auch in den nachfolgenden Figuren beschrieben, es zeigen:The invention is described in addition to the description in the following figures, which show:
Die Abfolge von Ereignissen im Common-Rail-System unter Normalbedingungen sieht wie folgt aus: Einspritzung, Pumpenhub, Einspritzung, Pumpenhub usw.The sequence of events in the common rail system under normal conditions is as follows: injection, pump stroke, injection, pump stroke, etc.
Anders sieht die Abfolge aus, wenn eine Pumpe nicht ordnungsgemäß funktioniert: Einspritzung, kein oder nur reduzierter Pumpenhub, Einspritzung, Pumpenhub etc.The sequence looks different when a pump is not working properly: injection, no or only reduced pump stroke, injection, pump stroke, etc.
Das Raildruck-Signal des Raildrucksensors
Der Betrag der Abweichung dieses Werts wird daraufhin mit einem Erkennungs-Grenzwert verglichen. Der Erkennungsgrenzwert ist über dem Betriebskennfeld des Motors frei definierbar. Sobald der Grenzwert für eine ebenfalls frei definierbare Zeitdauer überschritten ist, wird eine frei bestimmbare Fehlerreaktion ausgelöst. Für eine reibungslose Funktionalität darf die Fehlererkennung nur in einem quasi-stationären Zustand erfolgen. Die Grenzen für diese Quasi-Stationarität sind frei über dem Motorkennfeld definierbar.The amount of deviation of this value is then compared to a detection threshold. The detection threshold is freely definable over the operating map of the engine. As soon as the limit value for a freely definable time duration is exceeded, a freely determinable error reaction is triggered. For a smooth functionality, the error detection must be done only in a quasi-stationary state. The limits for this quasi-stationarity are freely definable over the engine map.
Die Erfindung ist geeignet, eine erhöhte Anzahl von Fehlerbeschwerden an Serienmotoren zu verhindern. Insbesondere kann nennenswerter Verschleiß zwischen Nockenwelle und Rollenstößel verschiedener Hochdruckpumpen vermieden werden. Die erhöhte Belastung von einer der beiden Rollenstößel kann wiederum Resultat eines Förderaussetzers bzw. einer Fördermengenreduzierung der anderen Pumpe sein, welche durch eine Fehlfunktion verursacht werden könnte. Bei der vorliegenden Erfindung geht es darum, Schadensfälle bei Hochdruck-Common-Rail-Pumpen bzw. an den Nocken der Nockenwelle frühzeitig, also vor dem Entstehen, herauszufinden. Die erfindungsgemäße Vorrichtung bzw. das Verfahren ermittelt die eventuell auftretenden Unterschiede bei der Kraftstoff-Förderung – falls sie denn auftreten – durch eine Auswertung der Druckverhältnisse mittels Railsensor
Fällt eine Pumpe aus oder fördert deutlich mehr oder weniger als die andere Pumpe, ist die schwarze Kennlinie maßgebend und man erkennt, dass das Delta-p sehr groß ist.If one pump fails or delivers significantly more or less than the other pump, the black characteristic is decisive and it can be seen that the delta-p is very large.
Die Messung sollte nach Möglichkeit immer zum gleichen Förderzeitpunkt der unterschiedlichen Hochdruckpumpen erfolgen. Weiterhin sollte die Auswertung bei einem stationären Zustand des Motors erfolgen, da nur dann der Raildruck auch angenähert konstant sein sollte. Beim Beschleunigen beispielsweise kann sich der Raildruck ändern und dies könnte zu Fehlmessungen oder Fehlinterpretationen führen. Weiterhin sollte über einen definierten Zeitraum gemessen werden und somit ein auftretendes einmaliges Aussetzen einer Förderung einer Hochdruckpumpe unberücksichtigt bleiben.If possible, the measurement should always be carried out at the same delivery time of the different high-pressure pumps. Furthermore, the evaluation should be carried out at a steady state of the engine, since only then the rail pressure should also be approximately constant. For example, when accelerating, the rail pressure may change and this could lead to incorrect measurements or misinterpretations. Furthermore, it should be measured over a defined period of time and thus an occurring single exposure of a promotion of a high-pressure pump should be disregarded.
In
Das in
Wie bereits weiter oben beschrieben, wird der physikalische Raildruck von jeder Einspritzung und jedem Pumpenhub beeinflusst. Dem Steuergerät
Mit Hilfe des Nockenwellensensors
Der Wert jeder einspritzsynchronen Raildruckinformation wird mit dem Nachfolgewert mittels Differenzbildung verglichen. Auf diesem Weg wechseln sich stets positive und negative Differenzwerte ab. Parallel dazu wird ein hierzu synchroner Datenkanal erzeugt, der beschreibt, welche Pumpe gerade aktiv ist. Dieser Datenkanal ist insofern frei parametrierbar, als dass festgelegt werden kann, welche Pumpe zeitlich zuerst in das Common-Rail-System
BezugszeichenlisteLIST OF REFERENCE NUMBERS
- 11
- Motorengine
- 22
-
Einspritzpumpe 1
Injection pump 1 - 33
-
Einspritzpumpe 2
Injection pump 2 - 44
- Common RailCommon rail
- 55
- RaildrucksensorRail pressure sensor
- 66
- Nocken-/KurbelwellenwinkelsensorCam / crank angle sensor
- 77
- MotorsteuergerätEngine control unit
- 88th
- Displaydisplay
- 99
- Fehlerspeichererror memory
Claims (9)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010024401A DE102010024401A1 (en) | 2009-12-19 | 2010-06-19 | Internal combustion engine, has injection pumps that convey fuel into common rail, where rail has rail pressure sensor, which determines and transmits rail pressure to engine control device |
EP10015600.9A EP2336533A3 (en) | 2009-12-19 | 2010-12-14 | Method for recognising and determining a defective high pressure pump of a common rail system by means of sensor signals and control device for a combustion engine |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009059674 | 2009-12-19 | ||
DE102009059674.7 | 2009-12-19 | ||
DE102010024401A DE102010024401A1 (en) | 2009-12-19 | 2010-06-19 | Internal combustion engine, has injection pumps that convey fuel into common rail, where rail has rail pressure sensor, which determines and transmits rail pressure to engine control device |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102010024401A1 true DE102010024401A1 (en) | 2011-06-22 |
Family
ID=44311333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102010024401A Withdrawn DE102010024401A1 (en) | 2009-12-19 | 2010-06-19 | Internal combustion engine, has injection pumps that convey fuel into common rail, where rail has rail pressure sensor, which determines and transmits rail pressure to engine control device |
Country Status (1)
Country | Link |
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DE (1) | DE102010024401A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102182602A (en) * | 2011-02-01 | 2011-09-14 | 潍柴动力股份有限公司 | Method and device for measuring rail voltage based on crank angle in high-voltage co-rail system |
CN103362714A (en) * | 2013-08-01 | 2013-10-23 | 中国北方发动机研究所(天津) | Testbed of high-pressure common rail system |
CN111183281A (en) * | 2017-10-09 | 2020-05-19 | 法国大陆汽车公司 | Method and system for verifying a phase of a vehicle engine |
DE102022202976A1 (en) | 2022-03-25 | 2023-09-28 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for detecting a defect in a high-pressure pump |
-
2010
- 2010-06-19 DE DE102010024401A patent/DE102010024401A1/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102182602A (en) * | 2011-02-01 | 2011-09-14 | 潍柴动力股份有限公司 | Method and device for measuring rail voltage based on crank angle in high-voltage co-rail system |
CN102182602B (en) * | 2011-02-01 | 2013-05-15 | 潍柴动力股份有限公司 | Method and device for measuring rail voltage based on crank angle in high-voltage co-rail system |
CN103362714A (en) * | 2013-08-01 | 2013-10-23 | 中国北方发动机研究所(天津) | Testbed of high-pressure common rail system |
CN111183281A (en) * | 2017-10-09 | 2020-05-19 | 法国大陆汽车公司 | Method and system for verifying a phase of a vehicle engine |
CN111183281B (en) * | 2017-10-09 | 2023-04-07 | 纬湃科技有限责任公司 | Method and system for verifying a phase of a vehicle engine |
DE102022202976A1 (en) | 2022-03-25 | 2023-09-28 | Robert Bosch Gesellschaft mit beschränkter Haftung | Method for detecting a defect in a high-pressure pump |
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R012 | Request for examination validly filed | ||
R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |