EP0411062B1 - Monitoring device for a fuel filter - Google Patents
Monitoring device for a fuel filter Download PDFInfo
- Publication number
- EP0411062B1 EP0411062B1 EP89909384A EP89909384A EP0411062B1 EP 0411062 B1 EP0411062 B1 EP 0411062B1 EP 89909384 A EP89909384 A EP 89909384A EP 89909384 A EP89909384 A EP 89909384A EP 0411062 B1 EP0411062 B1 EP 0411062B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- monitoring device
- sensor
- filter
- control device
- residue sensor
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 15
- 238000012806 monitoring device Methods 0.000 title claims abstract description 15
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
- F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Definitions
- the invention relates to a monitoring device for a fuel filter according to the preamble of claim 1.
- a monitoring device for a fuel filter is known from DE 32 31 142.
- a fuel filter with a water level sensor is described there. If the water level in the fuel filter exceeds a certain level, a warning lamp is activated by the evaluation electronics. Separate electronics are required for the water level sensor, which has no connection whatsoever to other monitoring devices or means for controlling or regulating the internal combustion engine.
- the invention has for its object to combine a monitoring device for a fuel filter with a device for electronic control of a diesel engine.
- the control device of the internal combustion engine is to supply the residue sensor with a supply voltage and monitor the output signal of the sensor.
- Such a device has the advantage that no separate control device is required for the sensor. This combination enables a large number of possible reactions to a restricted functionality of the fuel filter.
- Advantageous embodiments of the invention are characterized in the subclaims. The invention is explained below with reference to the embodiment shown in the drawing.
- the drawing shows the monitoring circuit 100 for a residue sensor 10.
- the residue sensor 10 is shown as a variable resistance.
- the residue sensor is referred to as a sensor.
- the sensor is via a connection point 25, on the one hand with a series connection of resistor 20 and switching device 70 and on the other hand with a protective scarf device 30 connected.
- the protective circuit 30 and the switching device 70 are connected to the control device 40 of the electronic diesel control.
- the control device 40 receives various sensor signals that characterize the operating state of the internal combustion engine and generates at least one control and regulating variable R influencing the internal combustion engine.
- the control device 40 also applies signals to a display device 50 and / or a diagnostic interface 60.
- the sensor 10 is supplied with the supply voltage U B by the switching device 70 via a resistor 20.
- the resistor 20 defines the current 10 flowing through the sensor 10. The current through the sensor must be kept low because of the electrolysis occurring on certain sensors.
- the sensor signal at the connection point 25 is fed to the control device 40 via the protective circuit 30.
- the signal is filtered, evaluated and possibly permanently stored in the control device 40.
- the control device 40 When a predetermined amount of residue has been reached, which corresponds to a certain output signal of the residue sensor, the control device 40 generates a warning signal, depending on this warning signal an error indicator 50 is triggered. The driver can immediately see that the filter functionality is limited.
- the entire monitoring circuit 100 is integrated in the control device of the control device 40, or existing means of the control device 40 are used.
- the switch device 70 can only apply voltage to the sensor 10 for short periods of time. or the polarity of the voltage applied to the sensor 10 can be reversed at any intervals.
- control device 40 can only activate the sensor 10 for a short time at certain times via the switching device 70, this can e.g. under certain operating conditions, at idle, after starting or at fixed intervals.
- the warning signal can be saved permanently, it is then available when requested, e.g. through a diagnostic system, at a diagnostic interface 60.
- the control device 40 can also influence the driving performance of the internal combustion engine depending on the output signal of the sensor 10, e.g. limits the operating map or limits the amount of fuel to be injected to certain values depending on the sensor 10.
Landscapes
- 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
Die Erfindung betrifft eine Überwachungseinrichtung für ein Kraftstoffilter gemäß dem Oberbegriff des Anspruchs 1. Eine solche Überwachungseinrichtung für ein Kraftstoffilter ist aus der DE 32 31 142 bekannt. Dort wird ein Kraftstoffilter mit Wasserstandssensor beschrieben. Übersteigt der Wasserstand im Kraftstoffilter ein bestimmtes Niveau, wird von der Auswerteelektronik eine Warnlampe angesteuert. Für den Wasserstandssensor ist eine separate Elektronik notwendig, diese hat keinerlei Verbindung zu anderen Überwachungseinrichtungen oder Mitteln zur Steuerung oder Regelung der Brennkraftmaschine.The invention relates to a monitoring device for a fuel filter according to the preamble of claim 1. Such a monitoring device for a fuel filter is known from DE 32 31 142. A fuel filter with a water level sensor is described there. If the water level in the fuel filter exceeds a certain level, a warning lamp is activated by the evaluation electronics. Separate electronics are required for the water level sensor, which has no connection whatsoever to other monitoring devices or means for controlling or regulating the internal combustion engine.
Aus der Motortechnischen Zeitschrift 49 des Jahrgangs 1988 auf Seite 37 bis Seite 41 wird eine elektronische Dieselregelung beschrieben. Diese Einrichtung regelt oder steuert verschiedene Größen wie Kraftstoffmenge, Drehzahl, Spritzbeginn in Abhängigkeit von verschiedenen Sensorsignalen. Dabei werden alle Regel- und Steuerfunktionen überwacht. Bei Ausfall oder Defekt einzelner Komponenten der Steuerung oder Regelung wird ein Notfahrbetrieb eingeleitet, und gleichzeitig wird der Fehler abgespeichert. Bei Wartungsarbeiten kann so der Fehler leicht lokalisiert werden. Mit dieser Einrichtung werden Fehler einzelner Komponenten der Steuerung oder Regelung der Brennkraftmaschine überwacht.An electronic diesel control system is described in Motortechnische Zeitschrift 49 of the year 1988 on page 37 to page 41. This device regulates or controls various variables such as fuel quantity, speed, start of spraying depending on different sensor signals. All regulation and control functions are monitored. In the event of failure or failure of individual control or regulation components, emergency operation is initiated and the error is saved at the same time. This makes it easy to locate the fault during maintenance work. With this facility Errors of individual components of the control or regulation of the internal combustion engine are monitored.
Der Erfindung liegt die Aufgabe zugrunde eine Überwachungseinrichtung für ein Kraftstoffilter mit einer Einrichtung zur elektronischen Regelung einer Dieselbrennkraftmaschine zu kombinieren. Die Steuereinrichtung der Brennkraftmaschine soll dabei den Rückstandssensor mit einer Versorgungsspannung beaufschlagen und das Ausgangssignal des Sensors überwachen. Diese Aufgabe wird durch die Merkmale von Anspruch 1 gelöst.The invention has for its object to combine a monitoring device for a fuel filter with a device for electronic control of a diesel engine. The control device of the internal combustion engine is to supply the residue sensor with a supply voltage and monitor the output signal of the sensor. This object is solved by the features of claim 1.
Eine solche Einrichtung hat den Vorteil, daß für den Sensor kein separates Steuergerät benötigt wird. Durch diese Kombination sind eine Vielzahl von möglichen Reaktionen auf eine eingeschränkte Funktionsfähigkeit des Kraftstoffilters möglich. Zweckmäßige Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet. Die Erfindung wird nachstehend anhand dem in der Zeichnung dargestellten Ausführungsbeispiel erläutert.Such a device has the advantage that no separate control device is required for the sensor. This combination enables a large number of possible reactions to a restricted functionality of the fuel filter. Advantageous embodiments of the invention are characterized in the subclaims. The invention is explained below with reference to the embodiment shown in the drawing.
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert.An embodiment of the invention is shown in the drawing and explained in more detail in the following description.
Die Zeichnung zeigt die Überwachungsschaltung 100 für einen Rückstandssensor 10. In der Zeichnung ist der Rückstandssensor 10 als veränderlicher Widerstand dargestellt. Im folgenden wird der Rückstandssensor als Sensor bezeichnet. Der Sensor ist über einen Verbindungspunkt 25, zum einen mit einer Reihenschaltung aus Widerstand 20 und Schalteinrichtung 70 und zum anderen mit einer Schutzschal tung 30 verbunden. Die Schutzschaltung 30 und die Schalteinrichtung 70 sind mit der Steuereinrichtung 40 der elektronischen Dieselregelung verbunden. Die Steuereinrichtung 40 erhält verschiedene den Betriebszustand der Brennkraftmaschine charakterisierende Sensorsignale und erzeugt wenigstens eine die Brennkraftmaschine beeinflussende Steuer- und Regelgröße R. Die Steuereinrichtung 40 beaufschlagt weiterhin eine Anzeigeeinricbtung 50 und/oder eine Diagnoseschnittstelle 60 mit Signalen.The drawing shows the
Der Sensor 10 wird durch die Schalteinrichtung 70 über einen Widerstand 20 mit der Versorgungsspannung UB beaufschlagt. Der Widerstand 20 legt dabei den durch den Sensor 10 fließenden Strom 10 fest. Der Strom durch den Sensor muß wegen der an bestimmten Sensoren auftretenden Elektrolyse klein gehalten werden.The
Das am Verbindungspunkt 25 liegende Sensorsignal wird über die Schutzschaltung 30 der Steuereinrichtung 40 zugeleitet. In der Steuereinrichtung 40 wird das Signal gefiltert, ausgewertet und gegebenenfalls dauerhaft gespeichert. Bei Erreichen einer vorgegebenen Rückstandsmenge, die einem bestimmten Ausgangssignal des Rückstandssensors entspricht, erzeugt die Steuereinrichtung 40 ein Warnsignal, abhängig von diesem Warnsignal wird eine Fehleranzeige 50 angesteuert. Der Fahrer kann damit sofort erkennen, daß die Filterfunktionsfähigkeit eingeschränkt ist.The sensor signal at the
Die gesamte Überwachungsschaltung 100 wird in das Steuergerät der Steuereinrichtung 40 integriert, oder es werden bereits vorhandene Mittel der Steuereinrichtung 40 verwendet.The
Falls trotz sorgfältiger Auslegung von Sensor 10 und Widerstand 20 eine unzulässig starke Elektrolyse, was die Zerstörung des Sensors zur Folge hat, auftritt, kann mit der Schalteinrichtung 70 der Sensor 10 nur für kurze Zeiträume mit Spannung beaufschlagt werden, oder es kann die Polarität der am Sensor 10 anliegenden Spannung in beliebigen Abständen umgepolt werden.If, despite careful design of the
Des weiteren kann die Steuereinrichtung 40 über die Schalteinrichtung 70 den Sensor 10 nur zu bestimmten Zeitpunkten für kurze Zeit aktivieren, dies kann z.B. bei bestimmten Betriebsbedingungen, im Leerlauf, nach dem Start oder in festen Zeitabständen erfolgen. Das Warnsignal kann dauerhaft abgespeichert werden, es steht dann bei Anforderung, z.B. durch ein Diagnosesystem, an einer Diagnoseschnittstelle 60 zur Verfügung. Die Steuereinrichtung 40 kann ferner die Fahrleistung der Brennkraftmaschine abhängig vom Ausgangssignal des Sensors 10 beeinflussen, in dem sie z.B. das Betriebskennfeld begrenzt oder die einzuspritzende Kraftstoffmenge abhängig vom Sensor 10 auf bestimmte Werte begrenzt.Furthermore, the
Mit einer solchen Überwachungseinrichtung ist es möglich die Brennkraftmaschine abhängig von der Funktionsfähigkeit des Kraftstoffilters zu beeinflussen und gleichzeitig den Fahrer über die eingeschränkte Funktionsfähigkeit zu informieren.With such a monitoring device it is possible to influence the internal combustion engine depending on the functionality of the fuel filter and at the same time to inform the driver of the restricted functionality.
Claims (7)
- Monitoring device for a fuel filter of a diesel internal-combustion engine having a residue sensor for determining the serviceability of the filter, the residue sensor generating a signal on the basis of the serviceability of the filter, characterised in that an electronic control device is provided for performance characteristic-dependent open-loop or closed-loop control of the fuel metering in diesel internal-combustion engines, the control device carrying out the monitoring of the residue sensor and the control device generating a warning signal on the basis of the serviceability of the filter.
- Monitoring device according to Claim 1, characterised in that the control device controls the supply voltage of the residue sensor.
- Monitoring device according to Claim 1 and/or 2, characterised in that the monitoring device is in connection with an error display and/or a diagnostic interface.
- Monitoring device according to Claim 3, characterised in that the error display is activated on the basis of the warning signal and/or the warning signal is provided at the diagnostic interface.
- Monitoring device according to at least one of the preceding claims, characterised in that the driving performance is influenced on the basis of the functioning of the filter, by limiting of the engine operating map.
- Monitoring device according to one of Claims 2 to 5, characterised in that the residue sensor is activated only for a short time and/or under certain operating conditions.
- Monitoring device according to one of Claims 2 to 5, characterised in that the residue sensor has applied to it a voltage which changes its polarity at certain intervals.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3839960A DE3839960A1 (en) | 1988-11-26 | 1988-11-26 | MONITORING DEVICE FOR A FUEL FILTER |
| DE3839960 | 1988-11-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0411062A1 EP0411062A1 (en) | 1991-02-06 |
| EP0411062B1 true EP0411062B1 (en) | 1992-10-21 |
Family
ID=6367948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89909384A Expired - Lifetime EP0411062B1 (en) | 1988-11-26 | 1989-08-25 | Monitoring device for a fuel filter |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5044335A (en) |
| EP (1) | EP0411062B1 (en) |
| JP (1) | JPH03502353A (en) |
| DE (2) | DE3839960A1 (en) |
| WO (1) | WO1990006437A1 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19622176C1 (en) * | 1996-06-01 | 1997-07-24 | Porsche Ag | Engine fuel-filter-monitoring system |
| US5880674A (en) * | 1997-05-12 | 1999-03-09 | Cummins Engine Company, Inc. | System for processing output signals associated with multiple vehicle condition sensors |
| DE19935237B4 (en) * | 1999-07-28 | 2009-09-24 | Volkswagen Ag | Method and device for determining the loading state of a fuel filter |
| US6534022B1 (en) * | 1999-10-15 | 2003-03-18 | Abb Lummus Global, Inc. | Conversion of nitrogen oxides in the presence of a catalyst supported on a mesh-like structure |
| US6533926B2 (en) | 2001-04-05 | 2003-03-18 | Fleetguard, Inc. | Filter cartridge with concentric circuit rings for data transmission |
| US6537444B2 (en) | 2001-04-05 | 2003-03-25 | Fleetguard, Inc. | Replaceable-cartridge filter with data transmission feature |
| DE10157798B4 (en) * | 2001-11-27 | 2008-01-03 | Sartorius Biotech Gmbh | Method for carrying out a filtration process of fluids |
| DE102004033954A1 (en) * | 2004-03-27 | 2005-10-13 | Robert Bosch Gmbh | Device and method for reducing the contamination of a sensor |
| DE102007031382A1 (en) * | 2007-06-26 | 2009-01-08 | Hengst Gmbh & Co.Kg | Fuel filter with filter recognition |
| US8312866B2 (en) | 2008-10-31 | 2012-11-20 | Ford Global Technologies, Llc | Fuel system diagnosis via fuel pressure switch |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5127242A (en) * | 1974-08-30 | 1976-03-06 | Komatsu Mfg Co Ltd | Kensetsusharyo no jidoanzenkeihosochi |
| US4491143A (en) * | 1982-04-01 | 1985-01-01 | Nissan Motor Company, Limited | Fuel supply system for internal combustion engines |
| JPS58205819A (en) * | 1982-05-26 | 1983-11-30 | ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Display device for quantity of liquid |
-
1988
- 1988-11-26 DE DE3839960A patent/DE3839960A1/en not_active Withdrawn
-
1989
- 1989-08-25 WO PCT/DE1989/000557 patent/WO1990006437A1/en active IP Right Grant
- 1989-08-25 US US07/548,902 patent/US5044335A/en not_active Expired - Fee Related
- 1989-08-25 DE DE8989909384T patent/DE58902523D1/en not_active Expired - Lifetime
- 1989-08-25 EP EP89909384A patent/EP0411062B1/en not_active Expired - Lifetime
- 1989-08-25 JP JP1508698A patent/JPH03502353A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN, Band 8. Nr. 234 (M-334) (1671) 26. Oktober 1984; & JP, A, 59115463 (MAZDA K.K.) 3. Juli 1984 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1990006437A1 (en) | 1990-06-14 |
| JPH03502353A (en) | 1991-05-30 |
| DE3839960A1 (en) | 1990-05-31 |
| DE58902523D1 (en) | 1992-11-26 |
| US5044335A (en) | 1991-09-03 |
| EP0411062A1 (en) | 1991-02-06 |
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