EP0512246A1 - Bypass valve control device - Google Patents

Bypass valve control device Download PDF

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Publication number
EP0512246A1
EP0512246A1 EP92105524A EP92105524A EP0512246A1 EP 0512246 A1 EP0512246 A1 EP 0512246A1 EP 92105524 A EP92105524 A EP 92105524A EP 92105524 A EP92105524 A EP 92105524A EP 0512246 A1 EP0512246 A1 EP 0512246A1
Authority
EP
European Patent Office
Prior art keywords
bypass valve
filter
regeneration
soot
open position
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
Application number
EP92105524A
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German (de)
French (fr)
Other versions
EP0512246B1 (en
Inventor
Klaus-Peter Dipl.-Ing. Ahmann
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.)
Daimler Benz AG
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Daimler Benz AG
Mercedes Benz AG
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Publication of EP0512246A1 publication Critical patent/EP0512246A1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0235—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using exhaust gas throttling means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • F02D9/06—Exhaust brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2260/00—Exhaust treating devices having provisions not otherwise provided for
    • F01N2260/14—Exhaust treating devices having provisions not otherwise provided for for modifying or adapting flow area or back-pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2430/00—Influencing exhaust purification, e.g. starting of catalytic reaction, filter regeneration, or the like, by controlling engine operating characteristics
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits

Definitions

  • the invention relates to a device for controlling a bypass valve according to the preamble of claim 1.
  • DE-PS 34 28 626 for diesel engines that have a throttle valve in the exhaust line as an engine braking device, to further increase the engine braking power to arrange additional bypass lines between the combustion chamber and exhaust pipe, which can be opened and closed by means of a constant throttle valve.
  • the invention has for its object to provide a generic device simple and inexpensive in such a way that the bypass valve can be used in addition to a controller to initiate the regeneration of the soot combustion filter as an engine brake valve for engine braking operation.
  • the solution according to the invention makes it possible, with a relatively simple and inexpensive device, to use the bypass valve, on the one hand, depending on operating parameters for the regeneration of the soot combustion filter and, on the other hand, to control the engine braking power.
  • the throttle valve 8 If the throttle valve 8 is closed, an increased engine braking power is achieved due to the increasing exhaust gas back pressure, the throttle valve 8 only when the diesel engine is in overrun mode, i.e. can be closed by the driver when the accelerator pedal 15 is in the zero position.
  • the bypass valve 10 can also be opened by means of a control command that can also be triggered manually via a switch 16 on the control unit 13, as a result of which the exhaust gas counterpressure upstream of the throttle valve 8 and thus the engine braking power further increases significantly.
  • the control unit 13 prevents the bypass valve 10 from opening in push mode with the throttle valve 8 open.
  • this state is transmitted to the driver by means of a signal lamp 17, which is now manually operated by actuating the Switch 16 can open the bypass valve 10 via the control unit 13.
  • the driver can initiate the ignition immediately via a regeneration to be initiated, or delay it until a situation favorable for the combustion of the soot particles, for example outside of inhabited areas, is present.
  • the switch position with open bypass valve 10 and open throttle valve 8 leads to compliance with the above Parameters for igniting the soot combustion filter 7 by the fuel / air mixture which is at least partially ignited in the combustion chamber 3 of the cylinder head 2, that from the combustion chamber 3 through the open bypass valve 10 and through the gas channel 9 into the exhaust gas line 6 and further into the soot combustion filter 7 flows, leads to a temperature exceeding the ignition temperature of the soot particles.
  • the bypass valve 10 remains open over several work cycles until the soot burning filter 7 is ignited with certainty. If the parameters required for an ignition are not complied with, the control unit 13 blocks the ignition to be initiated manually via the switch 16 by not opening the bypass valve 9.
  • the device according to the invention is preferably installed and switched so that a gas channel 9 with a bypass valve 10 is installed on each cylinder of a multi-cylinder diesel engine for an optimal increase in engine braking power, but possibly only a part of the total number of gas channels 9 for initiating the regeneration of the Soot burn filter 7 is released.

Abstract

The invention relates to a device for the regeneration of a soot burn-off filter (7) in an exhaust conduit (6) of a diesel engine by means of a fuel/air mixture which is ignited at least partially in the combustion space (3) of at least one cylinder (1) and which, from the combustion space (3), can be directed through a gas passage in the cylinder head (2) in a controlled manner by means of a bypass valve (10) into the exhaust conduit (6) upstream of the soot burn-off filter (7). It is the object of the invention to provide a simple and economical device of this kind which is suitable for reliable ignition of a soot burn-off filter (7) relatively remote from the engine. The object is achieved by virtue of the fact that the bypass valve (10) can be operated by the driver for the purpose of increasing the engine braking power and can be switched to an open position by a control unit (13) as a function of parameters describing the regeneration phase. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zur Steuerung eines Bypaßventiles gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a device for controlling a bypass valve according to the preamble of claim 1.

Aus der US-PS 4,380,149 ist ein Dieselmotor mit einem Bypaßkanal zwischen einem Brennraum und der Abgasanlage bekannt, wobei der Bypaßkanal durch ein Magnetventil auf- und zusteuerbar ist und wobei die Ansteuerung in Abhängigkeit von Betriebsparametern erfolgt. Dieser Bypaßkanal, der durch eine Durchgangsbohrung zwischen Vorkammer und Auspuffkrümmer gebildet ist, lässt nach Öffnung des Magnetventiles entzündetes Kraftstoff-Luft-Gemisch mit hoher Geschwindigkeit direkt in einen im Auspuffkrümmer angeordneten Rußfilter strömen und entzündet damit die im Rußfilter angesammelten Rußpartikel. Nachteilig ist es jedoch, daß die beschriebene Vorrichtung nur zur Zündung eines Rußfilters verwendet werden kann, der unmittelbar im direkten Wirkungsbereich der aus dem Bypaßkanal austretenden Flamme, also direkt im Auspuffkrümmer liegt. Nachteilig ist es ebenfalls, daß für den Betrieb der Vorrichtung ein aufwendiges, exakt mit der Taktfrequenz des Motors jeweils im Moment des Einspritzens kurzzeitig aufzusteuerndes Magnetventil sowie eine Einrichtung zur entsprechenden Ansteuerung des Magnetventiles erforderlich ist.From US Pat. No. 4,380,149 a diesel engine with a bypass channel between a combustion chamber and the exhaust system is known, the bypass channel being able to be opened and closed by a solenoid valve and being controlled as a function of operating parameters. This bypass channel, which is formed by a through hole between the prechamber and the exhaust manifold, allows the ignited fuel-air mixture to flow directly at high speed into a soot filter arranged in the exhaust manifold after opening the solenoid valve and thus ignites the soot particles accumulated in the soot filter. However, it is disadvantageous that the device described can only be used to ignite a soot filter which is located directly in the direct range of action of the flame emerging from the bypass duct, that is to say directly in the exhaust manifold. It is also disadvantageous that the operation of the device requires a complex solenoid valve which is to be briefly controlled exactly at the clock frequency of the engine at the moment of injection, and a device for correspondingly controlling the solenoid valve.

Im weiteren ist es aus der DE-PS 34 28 626 bekannt, bei Dieselmotoren, die eine Drosselklappe in der Auspuffleitung als Motorbremseinrichtung aufweisen, zur weiteren Erhöhung der Motorbremsleistung zusätzliche Bypaßleitungen zwischen Brennraum und Abgasleitung anzuordnen, die jeweils mittels eines Konstantdrosselventiles auf- und zugesteuert werden können.Furthermore, it is known from DE-PS 34 28 626, for diesel engines that have a throttle valve in the exhaust line as an engine braking device, to further increase the engine braking power to arrange additional bypass lines between the combustion chamber and exhaust pipe, which can be opened and closed by means of a constant throttle valve.

Der Erfindung liegt die Aufgabe zugrunde eine gattungsgemäße Vorrichtung einfach und kostengünstig derart auszubilden, daß das Bypaßventil neben einer Steuerung zur Einleitung der Regeneration des Rußabbrennfilters außerdem als Motorbremsventil für den Motorbremsbetrieb verwendet werden kann.The invention has for its object to provide a generic device simple and inexpensive in such a way that the bypass valve can be used in addition to a controller to initiate the regeneration of the soot combustion filter as an engine brake valve for engine braking operation.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. Die Merkmale der Unteransprüche kennzeichnen vorteilhafte Aus- und Weiterbildungen der Erfindung.This object is achieved by the characterizing features of claim 1. The features of the subclaims characterize advantageous refinements and developments of the invention.

Die erfindungsgemäße Lösung ermöglicht es, mit einer relativ einfachen und kostengünstigen Vorrichtung das Bypaßventil einerseits von Betriebsparametern abhängig zur Regeneration des Rußabbrennfilters und andererseits zur Steuerung der Motorbremsleistung zu verwenden.The solution according to the invention makes it possible, with a relatively simple and inexpensive device, to use the bypass valve, on the one hand, depending on operating parameters for the regeneration of the soot combustion filter and, on the other hand, to control the engine braking power.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung schematisch dargestellt und wird im folgenden näher beschrieben.An embodiment of the invention is shown schematically in the drawing and is described in more detail below.

Es zeigt einen Zylinder 1 mit einem Zylinderkopf 2 eines in einem Kraftfahrzeug eingebauten 4-Takt Dieselmotors mit Direkteinspritzung, wobei die erfindungsgemäße Lösung an Dieselmotoren mit anderen Einspritzverfahren gleichermaßen einsetzbar ist. Zur Ableitung der Abgase aus dem Zylinder 1 schließt sich an den Brennraum 3 des Zylinderkopfes 2 ein durch ein Auslaßventil 4 gesteuerter Auslaßkanal 5 an, der über eine Abgasleitung 6 mit einem Rußabbrennfilter 7 verbunden ist. In der Abgasleitung 6 ist weiterhin eine mechanisch oder über Zusatzeinrichtungen zu betätigende Drosselklappe 8 angeordnet. Zusätzlich zum Auslaßkanal 5 ist im Zylinderkopf 2 ein Gaskanal 9 abgeführt, der in den Auslaßkanal 5 bzw. die Abgasleitung 6 mündet. Dieser Gaskanal 9 ist durch ein Bypaßventil 10 auf- bzw. zusteuerbar, wobei das Bypaßventil 10 in Verbindung mit einem Druckspeicher 11 und einem Steuerschieber 12, der über ein elektronisches Steuergerät 13 angesteuert ist, pneumatisch schaltbar ist. An dem elektronischen Steuergerät 13 sind Sensoren 14 zum Erfassen und Verarbeiten der für die Regenerationsphase bzw. für das Abbrennen des Rußabbrennfilters 7 sowie für die Erhöhung der Motorbremsleistung erforderlichen Parameter angeschlossen. Dazu können z.B.

  • ein Drucksensor 14.1 zur Erfassung des Abgasgegendruckes stromauf des Rußabbrennfilters 7,
  • ein Temperatursensor 14.2 zur Erfassung der Abgastemperatur vorzugsweise am Eingang des Rußabbrennfilters 7,
  • ein Temperatursensor 14.3 zur Erfassung der Motortemperatur,
  • ein Sensor 14.4 zur Erfassung der Fahrgeschwindigkeit des Kraftfahrzeuges,
  • ein Sensor 14.5 zur Erfassung der Stellung des Fahrpedales 15,
  • ein Sensor 14.6 zur Erfassung der Stellung der Drosselklappe 8 gehören.
Durch diese Sensoren 14 werden alle für die Schaltung des Bypassventiles 10 relevanten Parameter erfaßt und durch das Steuergerät 13 verarbeitet sowie in Steuersignale an den Steuerschieber 12 und in Signale an den Fahrer umgesetzt.It shows a cylinder 1 with a cylinder head 2 of a 4-stroke diesel engine with direct injection installed in a motor vehicle, the solution according to the invention being equally applicable to diesel engines with other injection methods. To discharge the exhaust gases from the cylinder 1, the combustion chamber 3 of the cylinder head 2 is followed by an exhaust duct 5 controlled by an exhaust valve 4, which is connected via an exhaust gas line 6 to a soot combustion filter 7. In the exhaust line 6 there is also a mechanical or additional device Throttle valve 8 to be actuated arranged. In addition to the exhaust port 5, a gas port 9 is discharged in the cylinder head 2, which opens into the exhaust port 5 or the exhaust pipe 6. This gas channel 9 can be opened or closed by a bypass valve 10, the bypass valve 10 being pneumatically switchable in connection with a pressure accumulator 11 and a control slide 12 which is controlled via an electronic control unit 13. Sensors 14 for detecting and processing the parameters required for the regeneration phase or for burning off the soot-burning filter 7 and for increasing the engine braking power are connected to the electronic control device 13. You can do this, for example
  • a pressure sensor 14.1 for detecting the exhaust gas back pressure upstream of the soot burning filter 7,
  • a temperature sensor 14.2 for detecting the exhaust gas temperature, preferably at the entrance of the soot burning filter 7,
  • a temperature sensor 14.3 for detecting the engine temperature,
  • a sensor 14.4 for detecting the driving speed of the motor vehicle,
  • a sensor 14.5 for detecting the position of the accelerator pedal 15,
  • include a sensor 14.6 for detecting the position of the throttle valve 8.
These sensors 14 detect all parameters relevant to the switching of the bypass valve 10 and process them by the control unit 13 and convert them into control signals to the control slide 12 and into signals for the driver.

Die Wirkungsweise der erfindungsgemäßen Vorrichtung ist folgende:The operation of the device according to the invention is as follows:

-Motorbremsbetrieb:-Motor brake operation:

Ist die Drosselklappe 8 geschlossen, wird durch den ansteigenden Abgasgegendruck eine erhöhte Motorbremsleistung erreicht, wobei die Drosselklappe 8 nur bei Schiebebetrieb des Dieselmotors d.h. bei Nullstellung des Fahrpedales 15 durch den Fahrer schließbar ist. Darüber hinausgehend kann mittels eines ebenfalls manuell über einen Schalter 16 an das Steuergerät 13 auslösbaren Steuerbefehl zusätzlich das Bypaßventil 10 geöffnet werden, wodurch sich der Abgasgegendruck stromauf der Drosselklappe 8 und damit die Motorbremsleistung weiter wesentlich erhöht. Ein Öffnen des Bypaßventiles 10 im Schiebebetrieb bei geöffneter Drosselklappe 8 wird durch das Steuergerät 13 verhindert.If the throttle valve 8 is closed, an increased engine braking power is achieved due to the increasing exhaust gas back pressure, the throttle valve 8 only when the diesel engine is in overrun mode, i.e. can be closed by the driver when the accelerator pedal 15 is in the zero position. In addition, the bypass valve 10 can also be opened by means of a control command that can also be triggered manually via a switch 16 on the control unit 13, as a result of which the exhaust gas counterpressure upstream of the throttle valve 8 and thus the engine braking power further increases significantly. The control unit 13 prevents the bypass valve 10 from opening in push mode with the throttle valve 8 open.

-Regenerierung des Rußabbrennfilters 7:Regeneration of the soot burning filter 7:

Sind die zur Regeneration des Rußabbrennfilters 7 erforderlichen Parameter, wie ein entsprechend hoher Beladungsgrad mit Rußpartikeln, eine Mindesttemperatur der Auspuffgase und ein eine Mindesteinspritzmenge erfordernder Lastbetrieb des Dieselmotores erfüllt, wird dieser Zustand mittels einer Signallampe 17 an den Fahrer übermittelt, der nun manuell durch Betätigung des Schalters 16 über das Steuergerät 13 das Bypaßventil 10 öffnen kann.
Der Fahrer hat also die Möglichkeit nach Erkennen des Signals über eine einzuleitende Regeneration die Zündung sofort einzuleiten oder solange zu verzögern, bis eine für die Verbrennung der Rußpartikel günstige Situation z.B. außerhalb von bewohnten Gebieten gegeben ist. Es ist gleichermaßen möglich, die Zündung vom Erreichen oder Überschreiten einer vorgegebenen, innerhalb von Ortschaften unzulässigen Fahrzeuggeschwindigkeit abhängig zu machen, um weitestgehend auszuschließen, daß der Beginn der Regeneration in bewohnten Gebieten stattfindet.
Die Schaltstellung mit geöffneten Bypaßventil 10 und geöffneter Drosselklappe 8 führt bei Einhaltung der genannten Parameter zum Zünden des Rußabbrennfilters 7, indem das zumindest teilweise in dem Brennraum 3 des Zylinderkopfes 2 entflammte Kraftstoff-Luft-Gemisch, das von dem Brennraum 3 aus durch das offene Bypaßventil 10 und durch den Gaskanal 9 in die Abgasleitung 6 und weiter in den Rußabbrennfilter 7 strömt, zu einer die Entzündungstemperatur der Rußpartikel übersteigenden Temperatur führt. Dabei bleibt das Bypaßventil 10 über mehrere Arbeitstakte solange geöffnet, bis das Rußabbrennfilter 7 mit Sicherheit gezündet ist. Bei Nichteinhaltung der für eine Zündung erforderlichen Parameter wird durch das Steuergerät 13 die manuell über den Schalter 16 einzuleitende Zündung durch Nichtöffnen des Bypaßventiles 9 blockiert.If the parameters required for the regeneration of the soot burning filter 7, such as a correspondingly high degree of loading with soot particles, a minimum temperature of the exhaust gases and a load operation of the diesel engine requiring a minimum injection quantity, this state is transmitted to the driver by means of a signal lamp 17, which is now manually operated by actuating the Switch 16 can open the bypass valve 10 via the control unit 13.
After the signal has been recognized, the driver can initiate the ignition immediately via a regeneration to be initiated, or delay it until a situation favorable for the combustion of the soot particles, for example outside of inhabited areas, is present. It is equally possible to make the ignition dependent on reaching or exceeding a predetermined vehicle speed which is impermissible within built-up areas in order to largely rule out that the start of the regeneration takes place in inhabited areas.
The switch position with open bypass valve 10 and open throttle valve 8 leads to compliance with the above Parameters for igniting the soot combustion filter 7 by the fuel / air mixture which is at least partially ignited in the combustion chamber 3 of the cylinder head 2, that from the combustion chamber 3 through the open bypass valve 10 and through the gas channel 9 into the exhaust gas line 6 and further into the soot combustion filter 7 flows, leads to a temperature exceeding the ignition temperature of the soot particles. The bypass valve 10 remains open over several work cycles until the soot burning filter 7 is ignited with certainty. If the parameters required for an ignition are not complied with, the control unit 13 blocks the ignition to be initiated manually via the switch 16 by not opening the bypass valve 9.

Die erfindungsgemäße Vorrichtung ist vorzugsweise so installiert und geschaltet, daß an jedem Zylinder eines mehrzylindrischen Dieselmotores ein Gaskanal 9 mit einem Bypaßventil 10 für eine optimale Erhöhung der Motorbremsleistung installiert ist, wobei gegebenenfalls aber nur ein Teil der Gesamtzahl der Gaskanäle 9 für die Einleitung der Regeneration des Rußabbrennfilters 7 freigegeben wird.The device according to the invention is preferably installed and switched so that a gas channel 9 with a bypass valve 10 is installed on each cylinder of a multi-cylinder diesel engine for an optimal increase in engine braking power, but possibly only a part of the total number of gas channels 9 for initiating the regeneration of the Soot burn filter 7 is released.

Claims (5)

Vorrichtung zur Steuerung mindestens eines Bypaßventiles in einem Dieselmotor zum Antrieb eines Fahrzeuges, wobei das Bypaßventil in einem Gaskanal im Zylinderkopf des Dieselmotores zwischen einem Brennraum mindestens eines Zylinders und einer Abgasleitung stromauf eines Rußabbrennfilters angeordnet ist und von dem aus in Abhängigkeit von Betriebsparametern des Dieselmotores ein im Brennraum entflammtes Kraftstoff-Luft-Gemisch zur Regeneration des Rußfilters in die Abgasleitung einströmbar ist,
dadurch gekennzeichnet,
daß an jedem Zylinderkopf (2) des Dieselmotores jeweils ein Bypaßventil (10) angeordnet ist und daß die Bypaßventile (10) zusätzlich zur Erhöhung der Motorbremsleistung steuerbar sind, wobei zur Erhöhung der Motorbremsleistung sämtliche Bypaßventile (10) vom Fahrer aus in eine geöffnete Stellung gesteuert werden und für die Regeneration des Rußabbrennfilters (7) nur ein Teil der Bypaßventile (10) von einem Steuergerät (13) aus in Abhängigkeit von die Regenerationsphasen des Rußabbrennfilters (7) beschreibenden Parametern in eine geöffnete Stellung gesteuert werden.Device for controlling at least one bypass valve in a diesel engine for driving a vehicle, the bypass valve being arranged in a gas channel in the cylinder head of the diesel engine between a combustion chamber of at least one cylinder and an exhaust gas line upstream of a soot combustion filter and from which an in depending on operating parameters of the diesel engine Combustion chamber ignited fuel-air mixture can flow into the exhaust pipe for regeneration of the soot filter,
characterized,
that a bypass valve (10) is arranged on each cylinder head (2) of the diesel engine and that the bypass valves (10) can also be controlled to increase the engine braking power, all bypass valves (10) being controlled by the driver into an open position to increase the engine braking power are and for the regeneration of the soot burning filter (7) only a part of the bypass valves (10) are controlled by a control device (13) in dependence on parameters describing the regeneration phases of the soot burning filter (7) in an open position. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß in der Abgasleitung (6) eine zur Erhöhung der Motorbremsleistung schließbare Drosselklappe (8) angeordnet ist und daß das Bypaßventil (10) für eine weitere Erhöhung der Motorbremsleistung bei geschlossener Drosselklappe (8) und bei Nullaststellung des Fahrpedales (15) in eine geöffnete Stellung steuerbar ist.Device according to claim 1,
characterized,
that a throttle valve (8) which can be closed to increase the engine braking power is arranged in the exhaust line (6) and that the bypass valve (10) for a further increase in the engine braking power when the throttle valve (8) is closed and when the accelerator pedal (15) is in the open position is controllable. Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß das Bypaßventil (10) zur Einleitung der Regeneration des Rußabbrennfilters (7) bei Erreichen aller für die Einleitung der Regeneration des Rußabbrennfilters (7) erforderlichen Parameter in eine geöffnete Stellung steuerbar ist.Device according to claim 1 or 2,
characterized,
that the bypass valve (10) for initiating the regeneration of the soot burning filter (7) can be controlled in an open position when all the parameters required for initiating the regeneration of the soot burning filter (7) can be controlled. Vorrichtung nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die für die Einleitung der Regeneration des Rußabbrennfilters (7) erforderlichen Parameter mittels entsprechender Sensoren (14) durch das Steuergerät (13) erfassbar und verarbeitbar sind.Device according to one of claims 1 to 3,
characterized,
that the parameters required for the initiation of the regeneration of the soot burning filter (7) can be detected and processed by the control device (13) by means of corresponding sensors (14). Vorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß eine manuelle Ansteuerung des Bypaßventiles (10) in eine geöffnete Stellung bei Nichteinhaltung der erforderlichen Parameter durch das Steuergerät (13) gesperrt ist.Device according to one of claims 1 to 4,
characterized,
that manual control of the bypass valve (10) in an open position is blocked by the control unit (13) if the required parameters are not observed.
EP92105524A 1991-05-07 1992-03-31 Bypass valve control device Expired - Lifetime EP0512246B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4114829 1991-05-07
DE4114829A DE4114829A1 (en) 1991-05-07 1991-05-07 DEVICE FOR CONTROLLING A BYPASS VALVE

Publications (2)

Publication Number Publication Date
EP0512246A1 true EP0512246A1 (en) 1992-11-11
EP0512246B1 EP0512246B1 (en) 1995-08-23

Family

ID=6431128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105524A Expired - Lifetime EP0512246B1 (en) 1991-05-07 1992-03-31 Bypass valve control device

Country Status (3)

Country Link
US (1) US5218818A (en)
EP (1) EP0512246B1 (en)
DE (2) DE4114829A1 (en)

Cited By (3)

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WO1996004470A1 (en) * 1994-08-04 1996-02-15 Caterpillar Inc. Simultaneous exhaust valve opening braking system
WO2008061886A1 (en) * 2006-11-22 2008-05-29 Avl List Gmbh Method for regenerating at least one exhaust gas after-treatment device
EP2362085A3 (en) * 2010-02-25 2012-01-11 International Engine Intellectual Property Company, LLC Exhaust valve actuation system for diesel particulate filter regeneration

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CA2455344A1 (en) * 2001-04-20 2002-10-31 Jenara Enterprises Ltd. Apparatus and control for variable exhaust brake
US6901751B2 (en) 2002-02-01 2005-06-07 Cummins, Inc. System for controlling particulate filter temperature
EP1936160B1 (en) * 2006-12-22 2012-07-11 Volvo Car Corporation Exhaust gas treatment device regeneration inhibiting fuel combustion in an engine cylinder
AT506338A1 (en) * 2008-02-04 2009-08-15 Man Nutzfahrzeuge Oesterreich METHOD FOR REGENERATING A PARTICULATE FILTER ARRANGED IN THE EXHAUST GAS TRAY OF A VEHICLE DIESEL ENGINE
US7789065B2 (en) * 2008-07-09 2010-09-07 Zhou Yang Engine braking apparatus with mechanical linkage and lash adjustment
US20100037854A1 (en) * 2008-08-18 2010-02-18 Zhou Yang Apparatus and method for engine braking
EP2364930B1 (en) 2009-03-19 2018-12-05 Nestec S.A. Capsule for preparing coffee in a device comprising a cartridge holder with relief and recessed elements
US20110197572A1 (en) * 2010-02-12 2011-08-18 Liang Fei Industry Co., Ltd. Smart exhaust gas flow control apparatus
KR20210104326A (en) * 2020-02-17 2021-08-25 현대자동차주식회사 Control method for post injection during exhaust brake operation

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US4380149A (en) * 1981-02-09 1983-04-19 General Motors Corporation Method and means for diesel exhaust particulate emission control
DE3408057A1 (en) * 1984-03-05 1985-06-20 Daimler-Benz Ag, 7000 Stuttgart Method for the ignition of soot burn-off filters and diesel engine with soot burn-off filter
DE3428626A1 (en) * 1984-08-03 1986-02-13 Daimler-Benz Ag, 7000 Stuttgart Four-stroke internal combustion engine
EP0424092A1 (en) * 1989-10-19 1991-04-24 Wabco Automotive U.K. Limited Diesel engine exhaust system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996004470A1 (en) * 1994-08-04 1996-02-15 Caterpillar Inc. Simultaneous exhaust valve opening braking system
WO2008061886A1 (en) * 2006-11-22 2008-05-29 Avl List Gmbh Method for regenerating at least one exhaust gas after-treatment device
EP2362085A3 (en) * 2010-02-25 2012-01-11 International Engine Intellectual Property Company, LLC Exhaust valve actuation system for diesel particulate filter regeneration

Also Published As

Publication number Publication date
DE4114829A1 (en) 1992-11-12
EP0512246B1 (en) 1995-08-23
US5218818A (en) 1993-06-15
DE59203337D1 (en) 1995-09-28
DE4114829C2 (en) 1993-09-23

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