EP0357882A2 - Device for feeding measured quantities of volatile fuel components to the intake conduit of an internal-combustion engine - Google Patents

Device for feeding measured quantities of volatile fuel components to the intake conduit of an internal-combustion engine Download PDF

Info

Publication number
EP0357882A2
EP0357882A2 EP89109821A EP89109821A EP0357882A2 EP 0357882 A2 EP0357882 A2 EP 0357882A2 EP 89109821 A EP89109821 A EP 89109821A EP 89109821 A EP89109821 A EP 89109821A EP 0357882 A2 EP0357882 A2 EP 0357882A2
Authority
EP
European Patent Office
Prior art keywords
valve
auxiliary valve
combustion engine
closing member
intake pipe
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
EP89109821A
Other languages
German (de)
French (fr)
Other versions
EP0357882A3 (en
EP0357882B1 (en
Inventor
Bernd Beicht
Joachim Heinemann
Reinhard Tinz
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Priority to AT89109821T priority Critical patent/ATE75004T1/en
Publication of EP0357882A2 publication Critical patent/EP0357882A2/en
Publication of EP0357882A3 publication Critical patent/EP0357882A3/en
Application granted granted Critical
Publication of EP0357882B1 publication Critical patent/EP0357882B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0809—Judging failure of purge control system
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M2025/0845—Electromagnetic valves

Definitions

  • the invention relates to a device according to the preamble of patent claim 1.
  • Such a device is known from DE-OS 35 19 292. It is intended to prevent the volatile fuel components which are always present in the free space of the fuel tank of an internal combustion engine from escaping into the atmosphere, and uses a special ventilation line arranged between the free space and the atmosphere, in which a storage chamber with an absorption element is arranged.
  • This usually consists of a permeable body made of activated carbon, which is suitable for temporarily storing a considerable volume of volatile fuel.
  • a line is used which connects the storage chamber to the intake pipe of the internal combustion engine.
  • the fuel / air mixture drawn in by the internal combustion engine can become "over-rich", which can result in malfunctions.
  • the line can therefore be closed by an electromagnetic shut-off valve, the permeability of which can be changed on the one hand by external sensors and on the other hand by the negative pressure in the line acting on its closing element.
  • the invention has for its object to develop a device such that both an optimal regeneration of the absorption element and an optimal operating behavior of the internal combustion engine is guaranteed.
  • a bypass and an auxiliary valve are connected directly in series with the shut-off valve in parallel, the auxiliary valve being closable by a vacuum adjuster which can be actuated by the differential pressure between the control chamber and the atmosphere.
  • a vacuum adjuster which can be actuated by the differential pressure between the control chamber and the atmosphere.
  • the internal combustion engine shown in the left part of the illustration is denoted by 2 and is connected to the air filter 5 by the intake pipe 1 containing the throttle valve 3 and by the exhaust manifold 11 to the exhaust, not shown.
  • the fuel supply device 4 In the intake pipe 1, above the throttle valve 3, the fuel supply device 4 is provided, in which the fresh air volume supplied through the air filter 5 is mixed with fuel to the required extent.
  • the signals required for this are provided by the control unit 6, for example on the basis of the exhaust gas temperature and composition, the operating speed of the internal combustion engine and the ambient temperature.
  • the corresponding input signals, which were detected using appropriate sensors, are indicated by the arrows 7, 8, 9, 10. If required, they can be supplemented to the desired extent.
  • the associated fuel tank is shown in the right part of the illustration. It is only partially filled with fuel 15 and has a free space 22 above the fuel level.
  • the closure 16 of the fuel tank hermetically seals it from the environment.
  • the free space 22 of the fuel tank is connected to the atmosphere 23 through the vent line 25.
  • the vent line 25 contains the storage chamber 18, which is filled with granules of activated carbon. The dimensioning of the storage chamber 18 is so made that under normal operating conditions volatile fuel components can not pass the mouth of the vent line 25.
  • the line 20 On the side of the storage chamber 18 opposite the mouth of the ventilation line 25, the line 20 is connected, which connects the storage chamber 18 to the intake pipe 1 of the internal combustion engine 2.
  • the electromagnetic shutoff valve 13 is arranged in the line 20, which is closed when the internal combustion engine 2 is shut down and can be actuated by the control device 6.
  • auxiliary valve 15 Between the check valve 13 and the intake pipe is the auxiliary valve 15. This is opened when the internal combustion engine 2 is shut down by the action of the compression spring 16, which is arranged in the control chamber 14 and engages under the circumferential support collar 19 of the associated closing member 26 on one side. The other side of the support collar 19 rests on the side of the actuating membrane 26 which faces the control chamber 14 and which separates the control chamber 14 from the atmosphere 23. The following must be carried out for the function:
  • the shut-off valve 13 is opened statically and the volume of the amount of air sucked in by the storage chamber 18 is regulated by the auxiliary valve 15, the adjustment of the auxiliary valve 15 being based on a measurement of the differential pressure between the pressure in the intake pipe 1 and the pressure in line 20 and atmosphere 23.
  • the flow rate initially increases until a shutdown point is reached, which is determined primarily by the design of the compression spring 16 and the actuating membrane 26.
  • the auxiliary valve 15 closes and causes a reduction in the flow rate when the internal combustion engine is idling and coasting.
  • the bypass 40 which is adjustable in its opening cross section, is provided.
  • the quantities fed into the intake pipe can be metered by adjusting the opening cross section and dimensioned such that correct operation of the internal combustion engine is ensured at critical engine speeds.
  • the device shown comprises auxiliary devices which monitor their proper functioning during operation and display a signal in the event of malfunctions.
  • This self-diagnosis avoids a malfunction of the drive motor while driving (jerking, poor throttle response), as well as an increase in exhaust gas emissions that cannot otherwise be controlled while driving.
  • the monitoring device can be used both for service purposes and to meet legal requirements and improves the technical handling of the device.
  • the monitoring device also monitors not only the device as such, but also other components of the system, for example hose connections, electrical contacts, etc.
  • the structure can be described on the basis of the drawing as follows:
  • An error display 32 occurs, for example, on the dashboard 33 of the motor vehicle.
  • the signal evaluation requires at least the sensor signal 34, the signal of the switching state 35 of the check valve 13 and the signal of the intake manifold vacuum 36 as inputs, for example via the throttle valve position, an intake manifold pressure sensor, air flow meter or the like.
  • the monitoring function can be expanded by processing the lambda probe signal 9 of the lambda probe 12.
  • Membrane vibrations can be determined by attaching a proportionally sensitive element to vibratable components of the auxiliary valve 15. In this way, with clocked operation of the shut-off valve 13 and information 36 about the respective load state of the internal combustion engine 2, it can be determined whether a scheduled vibration of the gas column in the auxiliary valve 15 takes place .
  • a PE film can be attached in or on the adjusting membrane 16.
  • the signal amplification, processing and contacting is carried out in the sensor part 30.
  • Interference excitation for example from the engine or the body, is filtered out in the sensor part 30 or in the monitoring electronics via frequency filters.
  • Gas vibrations can be determined by a high-resolution pressure sensor 30. This provides information about the oscillation frequency of the gas column and delivers the sensor signal 34 to the monitoring device 31.
  • the following shows how a sensor 30 which detects the membrane vibration of the actuating diaphragm 26 with the aid of a known piezo film and passes it on to the monitoring device as signal 34, and how signals 35, 36 and 9 can be used to detect defects.
  • a bypass 40 (FIG. 2) to the control cross section 41 of the auxiliary valve 15 is provided in the device for the metered feeding of volatile fuel components to improve the meterability, which can be adjusted in its passage cross section without internal intervention.
  • This is done by an adjusting screw 42, which can enlarge and reduce a cross-sectional connection area 44 between the control chamber 43 and the control chamber 14 as required.
  • a flow rate that is independent of the auxiliary valve 15 can be set as soon as the control cross-section 41 releases a smaller cross-sectional area than the cross-sectional connection surface 44.
  • any desired flow rate can be set and adjusted by the bypass.
  • the bypass 40 can compensate for fluctuations in the dimensions of the components and properties, for example the closing member 27, the spring 16 or the actuating diaphragm 26 with regard to series production.
  • 42 flow metering can be carried out by simply turning the adjusting screw.
  • auxiliary valve in a clocked manner in addition to the above illustration.
  • the air volume actually passed through can thereby be sensitively adapted to the respective requirements and in particular to the respective operating state of the internal combustion engine 2.
  • the shut-off valve 13 closes due to the resulting voltage drop in its electrical drive due to the action of the spring 28, which also causes the internal combustion engine to continue running is reliably suppressed when the vacuum in the intake pipe 1 is temporarily still present.
  • the control of the check valve is interrupted by the action of the spring, an undosed introduction of fuel vapors into the intake pipe is excluded. No. possible malfunction Signal (36) Signal (35) Signal (9) Signal (34) Signal (32) I.
  • Closing member (13) hangs open Partial load clocked any Vibrations no II dto. to " " " " " " " III Control membrane (26) torn " " " Amplitude analysis " IV Locking element (27) hangs open “ “ “ Vibrations " V dto. to " “ “ “ “ “ VI Plug connection (39) n.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
  • Testing Of Engines (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

A device for the temporary storing and metered supplying of volatile fuel components present in the free space 22 of a fuel tank system 15 into the intake pipe 1 of a combustion engine 2. The device includes a deaeration pipe 25 which connects the free space 22 with the atmosphere 23 and in which a storage chamber 18 including an absorptive element is disposed. A pipe 20 connects the storage chamber 18 with the intake pipe and can be closed by means of an electromagnetic stop valve 13. An auxiliary valve 21 including a control chamber 14 which can be closed by means of a vacuum controller is disposed between the stop valve 13 and the intake pipe 1. A bypass 4 having an adjustable cross section is provided parallel to the auxiliary valve 21.

Description

Die Erfindung betrifft eine Vorrichtung nach dem Oberbe­griff des Patentanspruchs 1.The invention relates to a device according to the preamble of patent claim 1.

Eine solche Vorrichtung ist aus der DE-OS 35 19 292 bekannt. Sie soll das Entweichen der im Freiraum des Kraftstoffbe­hälters einer Brennkraftmaschine stets vorhandenen, flüch­tigen Kraftstoffbestandteile in die Atmosphäre verhindern und bedient sich der Verwendung einer speziellen, zwischen dem Freiraum und der Atmosphäre angeordneten Entlüftungs­leitung, in der eine Speicherkammer mit einem Absoprtions­element angeordnet ist. Dieses besteht zumeist aus einem durchlässigen Körper aus Aktivkohle, der geeignet ist, ein erhebliches Volumen flüchtigen Kraftstoffes vorübergehend zu speichern. Zur Regenerierung des Absorptionselementes wird Frischluft während des normalen Betriebes der Brenn­kraftmaschine durch dasselbe hindurchgesogen, wozu eine Leitung dient, die die Speicherkammer mit dem Ansaugrohr der Brennkraftmaschine verbindet. Dabei ist allerdings zu beachten, daß sich bei niedrigen Betriebsdrehzahlen der Brennkraftmaschine und/oder bei einem besonders hohen Sätti­gungsgrad des Absorptionselementes eine "Überfettung" des von der Brennkraftmaschine angesogenen Kraftstoff - Luft­gemisches ergeben kann, wodurch Betriebsstörungen resultieren können. Die Leitung ist daher durch ein elektromagnetisches Sperrventil verschließbar, das hinsichtlich seiner Durchlässig­keit einerseits durch externe Sensoren und andererseits durch den auf sein Schließglied einwirkenden Unterdruck in der Leitung veränderbar ist.Such a device is known from DE-OS 35 19 292. It is intended to prevent the volatile fuel components which are always present in the free space of the fuel tank of an internal combustion engine from escaping into the atmosphere, and uses a special ventilation line arranged between the free space and the atmosphere, in which a storage chamber with an absorption element is arranged. This usually consists of a permeable body made of activated carbon, which is suitable for temporarily storing a considerable volume of volatile fuel. To regenerate the absorption element, fresh air is drawn through the same during normal operation of the internal combustion engine, for which purpose a line is used which connects the storage chamber to the intake pipe of the internal combustion engine. It should be noted, however, that at low operating speeds of the internal combustion engine and / or at a particularly high degree of saturation of the absorption element, the fuel / air mixture drawn in by the internal combustion engine can become "over-rich", which can result in malfunctions. The line can therefore be closed by an electromagnetic shut-off valve, the permeability of which can be changed on the one hand by external sensors and on the other hand by the negative pressure in the line acting on its closing element.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung derart weiterzuentwickeln, daß sowohl eine optimale Regene­rierung des Absorptionselementes als auch ein optimales Betriebsverhalten der Brennkraftmaschine gewährleistet ist.The invention has for its object to develop a device such that both an optimal regeneration of the absorption element and an optimal operating behavior of the internal combustion engine is guaranteed.

Diese Aufgabe wird bei einer gattungsgemäßen Vorrichtung mit den kennzeichnenden Merkmalen des Patentanspruchs 1 ge­löst.This object is achieved in a generic device with the characterizing features of claim 1.

Auf vorteilhafte Ausgestaltungen nehmen die Unteransprüche bezug.The subclaims refer to advantageous configurations.

Bei der erfindungsgemäßen Vorrichtung ist dem Sperrventil parallel zueinander ein Bypass und ein Hilfsventil in Serie unmittelbar vorgeschaltet, wobei das Hilfsventil durch einen Unterdruckversteller schließbar ist, der durch den Differenz­druck zwischen der Steuerkammer und der Atmosphäre betätigbar ist. Bei Erreichen einer niedrigen Betriebsdrehzahl des Ver­brennungsmotors ergibt sich hierdurch ein relativ hoher Diffe­renzdruck, was dazu führt, daß der Vordruck des Sperrventils abgesenkt und eine insgesamt verminderte Durchlässigkeit erzielt wird. Eine Überfettung des der Brennkraftmaschine zugeführten Kraftstoff - Luftgemisches wird zuverlässig unterbunden. Die Dosierfähigkeit des Hilfsventils läßt sich dabei feinfühlig steuern durch die Möglichkeit, den Querschnitt des Bypasses zu verändern, was durch eine Stellschraube erfolgen kann.In the device according to the invention, a bypass and an auxiliary valve are connected directly in series with the shut-off valve in parallel, the auxiliary valve being closable by a vacuum adjuster which can be actuated by the differential pressure between the control chamber and the atmosphere. When a low operating speed of the internal combustion engine is reached, this results in a relatively high differential pressure, which leads to the admission pressure of the check valve being lowered and an overall reduced permeability being achieved. Over-greasing of the fuel / air mixture supplied to the internal combustion engine is reliably prevented. The metering ability of the auxiliary valve can be controlled sensitively by the possibility of changing the cross-section of the bypass, which can be done using an adjusting screw.

Bei Erreichen einer hohen Betriebsdrehzahl der Brennkraft­maschine ergibt sich demgegenüber ein relativ verminderter Differenzdruck an dem Unterdruckversteller, was dazu führt, daß der Vordruck an dem Sperrventil relativ erhöht ist. Die Gesamtdurchlässigkeit ist dementsprechend ebenfalls vergrößert und hat zur Folge, daß der Brennkraftmaschine ein entsprechend vergrößerter Anteil an Frischluft zugeführt wird, der das Absorp­tionselement durchströmt und dabei eine Anreicherung an Kraft­stoffbestandteilen erfahren hat. Das gute Verhalten der Brenn­kraftmaschine wird hierdurch nicht beeinträchtigt.In contrast, when a high operating speed of the internal combustion engine is reached, there is a relatively reduced differential pressure at the vacuum adjuster, which means that the admission pressure at the check valve is relatively increased. The overall permeability is accordingly also increased and has the consequence that the internal combustion engine is supplied with a correspondingly increased proportion of fresh air which flows through the absorption element and has thereby been enriched in fuel components. This does not affect the good behavior of the internal combustion engine.

Der Gegenstand der vorliegenden Erfindung wird nachfolgend anhand der in der Anlage beigefügten Zeichnung weiter erläutert. Diese zeigt die zu berücksichtigenden Einzel­komponenten teilweise in schematischer Darstellung.The object of the present invention is explained in more detail below with reference to the drawing attached to the system. This shows the individual components to be taken into account, partly in a schematic representation.

Die im linken Teil der Darstellung wiedergegebene Brennkraft­maschine ist mit 2 bezeichnet und durch das die Drosselklappe 3 enthaltende Ansaugrohr 1 mit dem Luftfilter 5 verbunden sowie durch den Auspuffkrümmer 11 mit dem nichtdargestellten Auspuff.The internal combustion engine shown in the left part of the illustration is denoted by 2 and is connected to the air filter 5 by the intake pipe 1 containing the throttle valve 3 and by the exhaust manifold 11 to the exhaust, not shown.

In dem Ansaugrohr 1 ist oberhalb der Drosselklappe 3 die Kraftstoffversorgungseinrichtung 4 vorgesehen, in welcher das durch das Luftfilter 5 zugeführte Frischluftvolumen im er­forderlichen Maße mit Kraftstoff versetzt wird. Die dazu er­forderlichen Signale werden durch das Steuergerät 6 bereit­gestellt, beispielsweise auf der Grundlage der Abgastemperatur und -Zusammensetzung, der Betriebsdrehzahl der Brennkraft­machine und der Umgebungstemperatur. Die entsprechenden Ein­gangsignale, welche unter Verwendung entsprechender Sensoren erfaßt wurden durch die Pfeile 7, 8, 9, 1o angedeutet. Sie können bei Bedarf in erwünschtem Maße ergänzt werden.In the intake pipe 1, above the throttle valve 3, the fuel supply device 4 is provided, in which the fresh air volume supplied through the air filter 5 is mixed with fuel to the required extent. The signals required for this are provided by the control unit 6, for example on the basis of the exhaust gas temperature and composition, the operating speed of the internal combustion engine and the ambient temperature. The corresponding input signals, which were detected using appropriate sensors, are indicated by the arrows 7, 8, 9, 10. If required, they can be supplemented to the desired extent.

Im rechten Teil der Darstellung ist der zugehörige Kraft­stoffbehälter wiedergegeben. Er ist nur teilweise mit Kraft­stoff 15 gefüllt und weist oberhalb des Kraftstoffspiegels einen Freiraum 22 auf. Der Verschluß 16 des Kraftstoffbehälter schließt denselben gegenüber der Umgebung hermetisch ab.The associated fuel tank is shown in the right part of the illustration. It is only partially filled with fuel 15 and has a free space 22 above the fuel level. The closure 16 of the fuel tank hermetically seals it from the environment.

Der Freiraum 22 des Kraftstoffbehälters ist durch die Ent­lüftungsleitung 25 mit der Atmophäre 23 verbunden. Die Ent­lüftungsleitung 25 enthält die Speicherkammer 18, welche mit einem Granulat aus Aktivkohle gefüllt ist. Die Dimen­sionierung der Speicherkammer 18 ist dabei so vorgenommen, daß unter normalen Betriebsbedingungen flüchtige Kraftstoffbestandteile die Mündung der Ent­lüftungsleitung 25 nicht passieren können.The free space 22 of the fuel tank is connected to the atmosphere 23 through the vent line 25. The vent line 25 contains the storage chamber 18, which is filled with granules of activated carbon. The dimensioning of the storage chamber 18 is so made that under normal operating conditions volatile fuel components can not pass the mouth of the vent line 25.

Auf der der Mündung der Entlüftungsleitung 25 gegenüber­liegenden Seite der Speicherkammer 18 ist die Leitung 20 angeschlossen, welche die Speicherkammer 18 mit dem An­saugrohr 1 der Brennkraftmaschine 2 verbindet. In der Lei­tung 2o ist das elektromagnetische Sperrventil 13 ange­ordnet, welches bei Außerbetriebsetzung der Brennkraft­maschine 2 geschlossen und durch das Steuergerät 6 be­tätigbar ist.On the side of the storage chamber 18 opposite the mouth of the ventilation line 25, the line 20 is connected, which connects the storage chamber 18 to the intake pipe 1 of the internal combustion engine 2. The electromagnetic shutoff valve 13 is arranged in the line 20, which is closed when the internal combustion engine 2 is shut down and can be actuated by the control device 6.

Zwischen dem Sperrventil 13 und dem Ansaugrohr ist das Hilfsventil 15. Dieses ist bei Außerbetriebsetzung der Brennkraftmaschine 2 geöffnet durch die Wirkung der Druck­feder 16, welche in der Steuerkammer 14 angeordnet ist und den umlaufenden Stützbund 19 des zugehörigen Schließgliedes 26 auf der einen Seite untergreift. Die andere Seite des Stützbundes 19 liegt auf der der Steuerkammer 14 zugewandten Seite der Stellmembran 26 an, welche die Steuerkammer 14 von der Atmosphäre 23 trennt. Zur Funktion ist folgendes auszuführen:Between the check valve 13 and the intake pipe is the auxiliary valve 15. This is opened when the internal combustion engine 2 is shut down by the action of the compression spring 16, which is arranged in the control chamber 14 and engages under the circumferential support collar 19 of the associated closing member 26 on one side. The other side of the support collar 19 rests on the side of the actuating membrane 26 which faces the control chamber 14 and which separates the control chamber 14 from the atmosphere 23. The following must be carried out for the function:

Während des normalen Betriebes der Brennkraftmaschine 2 ist das Sperrventil 13 statisch geöffnet und das Volumen der durch die Speicherkammer 18 angesogenen Luftmenge wird von dem Hilfsventil 15 geregelt, wobei die Verstellung des Hilfsventils 15 aufgrund einer Messung des Differenzdruckes zwischen dem Druck im Ansaugrohr 1 und im Druck in der Lei­tung 20 sowie der Atmosphäre 23 erfolgt. Mit ansteigendem Differenzdruck steigt die Durchflußmenge zunächst an bis zum Erreichen eines Abregelpunktes, der vorwiegend durch die Auslegung der Druckfeder 16 und der Stellmembran 26 bestimmt wird. Bei weiterem Anstieg des Differenzdruckes schließt das Hilfsventil 15 und bewirkt eine Verminderung der Durchflußmenge im Leerlauf - und Schubbetrieb des Ver­brennungsmotors. Parallel zu dem Hilfsventil 15 ist der in seinem Öffnungsquerschnitt verstellbare Bypass 40 vorge­sehen.During normal operation of the internal combustion engine 2, the shut-off valve 13 is opened statically and the volume of the amount of air sucked in by the storage chamber 18 is regulated by the auxiliary valve 15, the adjustment of the auxiliary valve 15 being based on a measurement of the differential pressure between the pressure in the intake pipe 1 and the pressure in line 20 and atmosphere 23. With increasing differential pressure, the flow rate initially increases until a shutdown point is reached, which is determined primarily by the design of the compression spring 16 and the actuating membrane 26. When the differential pressure rises further, the auxiliary valve 15 closes and causes a reduction in the flow rate when the internal combustion engine is idling and coasting. Parallel to the auxiliary valve 15, the bypass 40, which is adjustable in its opening cross section, is provided.

Hierdurch besteht eine Eingriffsmöglichkeit, welche es erlaubt, Streuungen hinsichtlich der Ansprechgenauigkeit des Hilfsventiles zu kompensieren, welche sich auch bei einer Großserienfertigung zwangsläufig ergeben. Darüber hinaus lassen sich die in das Ansaugrohr eingespeisten Mengen durch eine Verstellung des Öffnungsquerschnittes feinfühlig dosieren und so bemessen, daß bei kritischen Drehzahlen der Brennkraftmaschine ein ordnungsgemäßer Betrieb derselben gewährleistet ist.As a result, there is a possibility of intervention, which makes it possible to compensate for variations in the response accuracy of the auxiliary valve, which inevitably arise even in large-scale production. In addition, the quantities fed into the intake pipe can be metered by adjusting the opening cross section and dimensioned such that correct operation of the internal combustion engine is ensured at critical engine speeds.

Des weiteren umfaßt die dargestellte Vorrichtung Hilfseinrichtungen, welche ihre ordnungsgemäße Funktion während des laufenden Betriebes überwachen und bei Fehlfunk­tionen ein Signal zur Anzeige bringen. Diese Selbstdiagnose vermeidet ein Fehlverhalten des Antriebsmotors im Fahrbetrieb (ruckeln, schlechte Gasannahme), sowie einen sonst im Fahrbetrieb nicht kontrollierbaren Anstieg der Abgasemissionen. Die Überwachungseinrichtung kann sowohl für Service-Zwecke als auch zur Erfüllung gesetzlicher Auflagen eingesetzt werden und verbessert die technische Handhabung der Vorrichtung. Die Überwachungs-Einrichtung überwacht darüber hinaus nicht nur die Vorrichtung als solche, sondern auch andere Bauglieder des Systems, beispielsweise Schlauchverbindungen, elektrische Kontakte usw. Der Aufbau läßt sich anhand der Zeichnung wie folgt beschreiben:Furthermore, the device shown comprises auxiliary devices which monitor their proper functioning during operation and display a signal in the event of malfunctions. This self-diagnosis avoids a malfunction of the drive motor while driving (jerking, poor throttle response), as well as an increase in exhaust gas emissions that cannot otherwise be controlled while driving. The monitoring device can be used both for service purposes and to meet legal requirements and improves the technical handling of the device. The monitoring device also monitors not only the device as such, but also other components of the system, for example hose connections, electrical contacts, etc. The structure can be described on the basis of the drawing as follows:

Am Hilfsventil 15 der Vorrichtung ist das Sensorelement 30 angeordnet, welches elektrisch leitend mit der Überwachungs­ elektronik 31 verbunden ist. Eine Fehleranzeige 32 erfolgt z.B. an der Armaturentafel 33 des Kraftfahrzeuges. Die Signalauswertung erfordert als Eingänge mindestens das Sensorsignal 34, das Signal des Schaltzustandes 35 des Sperrventils 13 und das Signal des Saugrohrunterdruckes 36 z.B. über die Drosselklappenstellung, einen Saugrohrdrucksensor, Luftmengenmesser o.ä. Durch die Verarbeitung des Lambda-Sondensignals 9 derLambda-Sonde 12 läßt sich die Uberwachungsfunktion erweitern.The sensor element 30, which is electrically conductive with the monitoring, is arranged on the auxiliary valve 15 of the device electronics 31 is connected. An error display 32 occurs, for example, on the dashboard 33 of the motor vehicle. The signal evaluation requires at least the sensor signal 34, the signal of the switching state 35 of the check valve 13 and the signal of the intake manifold vacuum 36 as inputs, for example via the throttle valve position, an intake manifold pressure sensor, air flow meter or the like. The monitoring function can be expanded by processing the lambda probe signal 9 of the lambda probe 12.

Die Überwachung läuft wie folgt ab:
Die Brennkraftmaschine 2 nimmt einen bestimmten Lastzustand an, beispielsweise den Vollastzustand, den Teillastzustand oder den Leerlaufzustand. Dieser wird durch ein Element als Signal 36 an die Überwachungselektronik 31 übermittelt. Die Vorrichtung wird durch ein Steuergerät 6, gemäß den jeweiligen Betriebsbedingungen angesteuert. Über den Signal-Eingang von 35 erhält Überwachungselektronik 31 Auskunft darüber, ob das Sperrventil 13 statisch offen, statisch geschlossen, oder getaktet angesteuert wird. Durch diese beiden Signale ergibt sich der Soll-Zustand. Dieser wird verglichen mit dem Ist-Zustand durch den Sensor 30 und das Signal 34. Bei Abweichung der beiden voneinander erfolgt die Fehleranzeige 33 durch den Signalausgang 32. Die im einzelnen erreichte Membran-Stellung läßt sich wie folgt ermitteln:

  • a. Ein Endschalter wird durch den Druck der Feder 16 über das Schließglied 27 auf die Stellmembran 26 betätigt.
  • b. Eine besonders kostengünstige Messung läßt sich durch einen Hallsensor 30 erreichen. Zur Magnetfeld-Erzeugung kann ein Dauermagnet 37 in das Schließglied 27 eingespritzt werden oder das Material der Stell-Membran 26 permanent magnetisch ausgeführt werden, z.B. durch Einbringen von magnetischem Material in den die Stell-Membran bildenden elastomeren Werkstoff.
  • c. Durch Einbringung eines elektrisch leitfähigen Materials in die Stell-Membran 26 bzw. auf die dem Abschlußdeckel 38 zugewandte Seite und entsprechender Leitfähigkeitsmessung im Sensorteil 30. Bei Kontaktierung mit dem Abschlußdeckel 38 läßt sich die Endstellung der Stell-Membran 26 ebenfalls ermitteln.
The monitoring works as follows:
The internal combustion engine 2 assumes a certain load state, for example the full load state, the part load state or the idle state. This is transmitted to the monitoring electronics 31 by an element as a signal 36. The device is controlled by a control unit 6 in accordance with the respective operating conditions. Via the signal input of 35, monitoring electronics 31 receive information as to whether the check valve 13 is controlled statically open, closed statically, or clocked. The target state results from these two signals. This is compared with the actual state by the sensor 30 and the signal 34. If the two differ from one another, the error display 33 is given by the signal output 32. The membrane position reached in detail can be determined as follows:
  • a. A limit switch is actuated by the pressure of the spring 16 via the closing member 27 on the actuating membrane 26.
  • b. A particularly inexpensive measurement can be achieved using a Hall sensor 30. To generate a magnetic field, a permanent magnet 37 can be injected into the closing member 27 or the material of the actuating membrane 26 can be made permanently magnetic, for example by introducing magnetic material into the elastomeric material forming the actuating membrane.
  • c. By introducing an electrically conductive material into the actuating membrane 26 or on the side facing the end cover 38 and corresponding conductivity measurement in the sensor part 30. When contacting the end cover 38, the end position of the actuating membrane 26 can also be determined.

Membran-Schwingungen lassen sich ermitteln durch Anbringung eines proportional sensitiven Elementes an schwingungsfähigen Bauteilen des Hilfsventils 15. Hierdurch kann bei getaktetem Betrieb des Sperrventils 13 und Information 36 über den jeweiligen Lastzustand der Brennkraftmaschine 2 festgestellt werden, ob eine planmäßige Schwingung der Gassäule im Hilfsventil 15 erfolgt. Hierzu kann z.B. eine PE-Folie in oder an der Stell-Membran 16 angebracht werden. Die Signal-­Verstärkung, Verarbeitung und Kontaktierung wird im Sensorteil 30 vorgenommen. Über Frequenz-Filter werden im Sensorteil 30 oder in der Überwachungselektronik Störanregungen z.B. vom Motor oder von der Karosserie ausgefiltert.Membrane vibrations can be determined by attaching a proportionally sensitive element to vibratable components of the auxiliary valve 15. In this way, with clocked operation of the shut-off valve 13 and information 36 about the respective load state of the internal combustion engine 2, it can be determined whether a scheduled vibration of the gas column in the auxiliary valve 15 takes place . For this purpose, for example, a PE film can be attached in or on the adjusting membrane 16. The signal amplification, processing and contacting is carried out in the sensor part 30. Interference excitation, for example from the engine or the body, is filtered out in the sensor part 30 or in the monitoring electronics via frequency filters.

Gasschwingungen lassen sich durch einen hochauflösenden Drucksensor 30 ermitteln. Dieser liefert Aufschluß über die Schwingungsfrequenz der Gassäule und liefert das Sensor-Signal 34 an die Überwachungseinrichtung 31.Gas vibrations can be determined by a high-resolution pressure sensor 30. This provides information about the oscillation frequency of the gas column and delivers the sensor signal 34 to the monitoring device 31.

Durch das aufgezeigte System lassen sich mit Hilfe von logischen Verknüpfungen durch einen Microprozessor in der Überwachungselektronik 31 und den vorliegenden Eingangssignalen 9, 34 - 36 sicher und reproduzierbar sowohl mögliche Unregelmäßigkeiten/Defekte an der Vorrichtung zum dosierten Einspeisen der flüchtigen Kraftstoffbestandteile feststellen als auch im restlichen System. Es wird der Bereich Aktiv-Kohle-Speicher 18 bis Saugrohr 1 erfaßt und überwacht. Explizit können folgende Defekte erkannt werden: Fehlfunktionen am Sperrventil 13, Fehlfunktionen im Hilfsventil 15, fehlerhafte Ansteuerungen des Sperrventils 13 (Stecker abgefallen) Leitungsverschüsse in den Leitungen 20 und 38 vor und hinter der Vorrichtung, fehlerhafte Leitungsverbindungen durch Vertauschen. Eine Überwachung der Überwachungsein­richtung (Sensor 30 mit Elektronik 31) kann ebenfalls durchgeführt werden. Beispielhaft soll nachfolgend gezeigt werden, wie durch einen Sensor 30 der die Membranschwingung der Stellmenbran 26 mit Hilfe einer bekannten Piezofolie erfaßt und als Signal 34 an die Überwachungseinrichtung weitergibt, sowie dem Signal 35, 36 und 9 eine Erkennung von Defekten durchgeführt werden kann.With the system shown, with the aid of logical links by a microprocessor in the monitoring electronics 31 and the input signals 9, 34-36 present, possible irregularities / defects in the device for the metered feeding of the volatile fuel components as well as in the rest of the system can be determined . The area active carbon storage 18 to intake manifold 1 is detected and monitored. The following defects can be identified explicitly: malfunctions on the shut-off valve 13, malfunctions in the auxiliary valve 15, faulty actuations of the shut-off valve 13 (connector disconnected), line closures in lines 20 and 38 in front of and behind the device, faulty line connections due to interchanging. Monitoring of the monitoring device (sensor 30 with electronics 31) can also be carried out. By way of example, the following shows how a sensor 30 which detects the membrane vibration of the actuating diaphragm 26 with the aid of a known piezo film and passes it on to the monitoring device as signal 34, and how signals 35, 36 and 9 can be used to detect defects.

In die Vorrichtung zum dosierten Einspeisen von flüchtigen Kraftstoffbestandteilen wird zur Verbesserung der Dosierfähigkeit ein Bypaß 40 (Figur 2) zum Regelquerschnitt 41 des Hilfsventils 15 vorgesehen, der ohne innere Eingriffe in seinem Durchlaßquerschnitt verstellt werden kann. Dies geschieht durch eine Stellschraube 42, die eine Querschnittsverbindungsfläche 44 zwischen der Kontrollkammer 43 und der Steuerkammer 14 nach Bedarf vergrößern und verkleinern kann. Hierdurch läßt sich eine vom Hilfsventil 15 unabhängige Durchlaßmenge einstellen, sobald der Regelquerschnitt 41 eine kleinere Querschnittsfläche freigibt, als die Querschnittsverbindungsfläche 44. Insbesondere, wenn kein Regelquerschnitt 41 mehr vorhanden ist, läßt sich durch den Bypaß jede gewünschte Durchflußmenge einstellen und justieren. Durch den Bypaß 40 können Schwankungen hinsichtlich der Abmessungen der Bauteile und - Eigenschaften, z.B. des Schließgliedes 27, der Feder 16 oder der Stellmembran 26 in Hinblick auf eine Serienfertigung kompensiert werden. Durch eine Justierung über den Bypaß 40 können nach erfolgter Montage der Vorrichtung durch einfaches Verdrehen der Stellschraube 42 Durchflußmengendosierungen vorgenommen werden.A bypass 40 (FIG. 2) to the control cross section 41 of the auxiliary valve 15 is provided in the device for the metered feeding of volatile fuel components to improve the meterability, which can be adjusted in its passage cross section without internal intervention. This is done by an adjusting screw 42, which can enlarge and reduce a cross-sectional connection area 44 between the control chamber 43 and the control chamber 14 as required. As a result, a flow rate that is independent of the auxiliary valve 15 can be set as soon as the control cross-section 41 releases a smaller cross-sectional area than the cross-sectional connection surface 44. In particular, if there is no more control cross-section 41, any desired flow rate can be set and adjusted by the bypass. The bypass 40 can compensate for fluctuations in the dimensions of the components and properties, for example the closing member 27, the spring 16 or the actuating diaphragm 26 with regard to series production. By adjusting the bypass 40 after the device has been installed, 42 flow metering can be carried out by simply turning the adjusting screw.

Im Hinblick auf eine nochmals verbesserte Entsorgung der Speicherkammer 18 besteht auch die Möglichkeit, das Hilfs­ventil ergänzend der vorstehenden Darstellung getaktet an­zusteuern. Das tatsächlich durchgesetzte Luftvolumen läßt sich hierdurch feinfühlig den jeweiligen Bedürfnissen an­passen und insbesondere dem jeweiligen Betriebszustand der Brennkraftmaschine 2. Bei Abschaltung derselben schließt das Sperrventil 13 durch den sich ergebenden Spannungsabfall an seinem elektrischen Antrieb durch die Wirkung der Feder 28, wodurch ein Nachlaufen der Brennkraftmaschine auch bei zeitweilig noch anstehendem Unterdruck im Ansaugrohr 1 zu­verlässig unterdrückt wird. Ebenso wird bei Unterbrechung der Ansteuerung des Sperrventils durch die Wirkung der Feder eine undosierte Einführung von Kraftstoffdämpfen in das An­saugrohr ausgeschlossen. No. mögl. Defekt Signal (36) Signal (35) Signal (9) Signal (34) Signal (32) I Schließglied (13) hängt offen Teillast getaktet beliebig Schwingungen kein II dto. zu " " " " " III Stellmembran (26) gerissen " " " Amplitiudenauswertung " IV Schließglied (27) hängt offen " " " Schwingungen " V dto. zu " " " " " VI Steckverbindung (39) n. kontaktiert " " " " VII Leitg. (20) von Speicherkammer (18) zur Vorrichtg. nicht durchgängig/nicht verbunden " " " " " VIII Leitg. (38) nicht durchgängig oder nicht verbunden " " " " " IX Überwachungseinrichtg. (31) oder Sensor (30) defekt " " " " " X Leitung (20) nicht verbunden Vollast 1 x getaktet Sprung beliebig " With regard to a further improved disposal of the storage chamber 18, it is also possible to control the auxiliary valve in a clocked manner in addition to the above illustration. The air volume actually passed through can thereby be sensitively adapted to the respective requirements and in particular to the respective operating state of the internal combustion engine 2. When the latter is switched off, the shut-off valve 13 closes due to the resulting voltage drop in its electrical drive due to the action of the spring 28, which also causes the internal combustion engine to continue running is reliably suppressed when the vacuum in the intake pipe 1 is temporarily still present. Likewise, if the control of the check valve is interrupted by the action of the spring, an undosed introduction of fuel vapors into the intake pipe is excluded. No. possible malfunction Signal (36) Signal (35) Signal (9) Signal (34) Signal (32) I. Closing member (13) hangs open Partial load clocked any Vibrations no II dto. to " " " " " III Control membrane (26) torn " " " Amplitude analysis " IV Locking element (27) hangs open " " " Vibrations " V dto. to " " " " " VI Plug connection (39) n. Contacted " " " " VII Leitg. (20) from the storage chamber (18) to the device. not continuous / not connected " " " " " VIII Leitg. (38) not consistent or not connected " " " " " IX Monitoring device (31) or sensor (30) defective " " " " " X Line (20) not connected Full load 1 x clocked Leap any "

Claims (10)

1. Vorrichtung zum vorübergehenden Speichern und do­sierten Einspeisen der im Freiraum einer Tankanlage befindlichen, flüchtigen Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine, umfassend eine den Freiraum mit der Atmosphäre verbindende Ent­lüftungsleitung, in der eine Speicherkammer mit einem Absorptionselement angeordnet ist sowie eine die Spei­cherkammer mit dem Ansaugrohr verbindende Leitung, die durch ein elektromagnetisches Sperrventil verschließbar ist, die eine zwischen Sperrventil und Ansaugrohr be­findliche Steuerkammer erweiterten Querschnittes aufweist sowie ein in der Steuerkammer angeordnetes Hilfsmittel zur Veränderung der Durchlässigkeit des Sperrventils, dadurch gekennzeichnet, daß das Hilfsmittel aus einem zwischen dem Sperrventil (13) und dem Ansaugrohr (1) befindlichen Hilfsventil (15) besteht, daß das Hilfsventil (15) durch einen Unterdruckversteller verschließbar ist, daß parallel zu dem Hilfsventil ein Bypass von veränderbarem Querschnitt vorgesehen ist und daß der Unterdruckversteller durch den Differenzdruck zwischen der Steuerkammer (14) und der Atmos­phäre (23) betätigbar ist.1.Device for temporarily storing and metering the volatile fuel components located in the free space of a tank system into the intake pipe of an internal combustion engine, comprising a vent line connecting the free space with the atmosphere, in which a storage chamber with an absorption element is arranged, and one the storage chamber with the intake pipe connecting line which can be closed by an electromagnetic shut-off valve, which has a control chamber with an enlarged cross-section between the shut-off valve and the intake pipe, and an aid arranged in the control chamber for changing the permeability of the shut-off valve, characterized in that the aid consists of a between the shut-off valve (13) and the suction pipe (1) located auxiliary valve (15) that the auxiliary valve (15) can be closed by a vacuum adjuster, that a bypass of variable cross-section parallel to the auxiliary valve t is provided and that the vacuum adjuster can be actuated by the differential pressure between the control chamber (14) and the atmosphere (23). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Unterdruckversteller gegen die Kraft einer Feder (16) wirksam ist.2. Device according to claim 1, characterized in that the vacuum adjuster is effective against the force of a spring (16). 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß die Feder (16) als Druckfeder ausgebildet und in der Steuerkammer (14) angeordnet ist.3. Apparatus according to claim 2, characterized in that the spring (16) is designed as a compression spring and is arranged in the control chamber (14). 4. Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Unterdruckversteller aus einer Stellmembran (26) besteht und daß die Stellmembran (26) zwischen der Atmosphäre (23) und der Steuerkammer (14) angeordnet ist.4. Device according to one of claims 1 to 3, characterized in that the vacuum adjuster consists of an actuating membrane (26) and that the actuating membrane (26) is arranged between the atmosphere (23) and the control chamber (14). 5. Vorrichtung nach den Ansprüchen 3 und 4, dadurch gekennzeich­net, daß das Hilfsventil (15) ein separates Schließglied (27) aufweist, und daß das Schließglied (27) mit einem Stützbund (19) versehen ist und daß der Stützbund (19) einerseits an der Stellmembran (26) und andererseits an der Druckfeder (16) anliegt.5. Device according to claims 3 and 4, characterized in that the auxiliary valve (15) has a separate closing member (27), and that the closing member (27) is provided with a support collar (19) and that the support collar (19) on the one hand on the control membrane (26) and on the other hand rests on the compression spring (16). 6. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß das Hilfsventil (15) mit einer parallel zur Bewegungs­richtung des Schließgliedes (27) geöffneten Durchtritts­öffnung versehen ist und daß das Schließglied (27) eine in der Öffnung geführte Verlängerung (24) aufweist.6. The device according to claim 5, characterized in that the auxiliary valve (15) is provided with an opening parallel to the direction of movement of the closing member (27) and that the closing member (27) has an extension (24) guided in the opening. 7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß das Schließglied (27) und/oder die Öffnung im Bereich der aneinander anlegbaren Dichtflächen des Hilfsventils (15) kegelig ausgebildet sind (ist).7. The device according to claim 6, characterized in that the closing member (27) and / or the opening in the region of the mutually contactable sealing surfaces of the auxiliary valve (15) are conical (is). 8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß das Sperrventil (13) mit einem elek­trisch betätigbaren Antrieb versehen ist.8. Device according to one of claims 1 to 7, characterized in that the check valve (13) is provided with an electrically actuated drive. 9. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, daß der Antrieb gegen die Kraft einer Feder wirksam ist und bei einer Betätigung ein Öffnen des Sperrven­tils (13) bewirkt.9. The device according to claim 8, characterized in that the drive is effective against the force of a spring and causes an opening of the check valve (13) when actuated. 10. Vorrichtung nach den Ansprüchen 8 bis 9 dadurch gekenn­zeichnet, daß der Antrieb mit elektrischen Anschlüssen versehen ist, die sich außerhalb der kraftstoffberührten Teile des Sperrventils (13) befinden.10. Device according to claims 8 to 9, characterized in that the drive is provided with electrical connections which are located outside the fuel-wetted parts of the check valve (13).
EP89109821A 1988-09-09 1989-05-31 Device for feeding measured quantities of volatile fuel components to the intake conduit of an internal-combustion engine Expired - Lifetime EP0357882B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89109821T ATE75004T1 (en) 1988-09-09 1989-05-31 DEVICE FOR DOSING VOLATILE FUEL COMPONENTS INTO THE INTAKE PIPE OF AN INTERNAL ENGINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830722 1988-09-09
DE3830722A DE3830722A1 (en) 1988-09-09 1988-09-09 DEVICE FOR FEEDING FUEL FUEL COMPONENTS INTO THE SUCTION PIPE OF AN INTERNAL COMBUSTION ENGINE

Publications (3)

Publication Number Publication Date
EP0357882A2 true EP0357882A2 (en) 1990-03-14
EP0357882A3 EP0357882A3 (en) 1990-11-07
EP0357882B1 EP0357882B1 (en) 1992-04-15

Family

ID=6362641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109821A Expired - Lifetime EP0357882B1 (en) 1988-09-09 1989-05-31 Device for feeding measured quantities of volatile fuel components to the intake conduit of an internal-combustion engine

Country Status (7)

Country Link
US (1) US4953514A (en)
EP (1) EP0357882B1 (en)
JP (1) JPH02256862A (en)
AT (1) ATE75004T1 (en)
BR (1) BR8904486A (en)
DE (2) DE3830722A1 (en)
ES (1) ES2030938T3 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017353A1 (en) * 1990-05-01 1991-11-14 Siemens Aktiengesellschaft Carbon canister purge system
FR2671597A1 (en) * 1991-01-16 1992-07-17 Eaton Sa Monaco Solenoid valve with variable passage cross-section
EP0495161A1 (en) * 1991-01-11 1992-07-22 Firma Carl Freudenberg Device for temporary storing and feeding measured quantities of evaporated fuel from the free space of a tank in the intake manifold of an internal combustion engine
WO1992017698A1 (en) * 1991-03-28 1992-10-15 Siemens Aktiengesellschaft Diagnostic system for canister purge system
EP0546247A1 (en) * 1991-12-04 1993-06-16 Firma Carl Freudenberg Device for feeding measured quantities of volatile fuel components to the intake conduit of an internal combustion machine
DE4205101A1 (en) * 1992-02-20 1993-08-26 Mann & Hummel Filter Controlled dosing of fuel vapour into IC engine - using double action control valve to shut off when engine is off and to restrict fuel vapour release at idling speed
FR2706566A1 (en) * 1993-06-16 1994-12-23 Sagem Allumage Valve for a solenoid valve, and a circuit for recycling petrol vapors comprising such a valve.
WO2001073283A1 (en) * 2000-03-24 2001-10-04 Robert Bosch Gmbh Tank ventilation system for a motor vehicle and method for operating a system of this type

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5054455A (en) * 1989-12-18 1991-10-08 Siemens-Bendix Automotive Electronics Limited Regulated flow canister purge system
DE4003751C2 (en) * 1990-02-08 1999-12-02 Bosch Gmbh Robert Tank ventilation system for a motor vehicle and method for checking its functionality
US5199404A (en) * 1990-03-08 1993-04-06 Siemens Automotive Limited Regulated flow canister purge system
US5323751A (en) * 1990-07-13 1994-06-28 Toyota Jidosha Kabushiki Kaisha Device for controlling operation of fuel evaporative purge system of an internal combustion engine
DE4023044A1 (en) * 1990-07-20 1992-01-23 Bosch Gmbh Robert VALVE FOR THE DOSED ADMINISTRATION OF VOLATILIZED FUEL TO THE FUEL-AIR MIXTURE OF AN INTERNAL COMBUSTION ENGINE
DE4035158C1 (en) * 1990-11-06 1992-01-09 Fa. Carl Freudenberg, 6940 Weinheim, De
US5069188A (en) * 1991-02-15 1991-12-03 Siemens Automotive Limited Regulated canister purge solenoid valve having improved purging at engine idle
JP2935249B2 (en) * 1991-05-31 1999-08-16 本田技研工業株式会社 Fuel control system for starting internal combustion engine
US5117797A (en) * 1991-10-17 1992-06-02 Coltec Industries Inc. Purge valve
US5146902A (en) * 1991-12-02 1992-09-15 Siemens Automotive Limited Positive pressure canister purge system integrity confirmation
DE4229105C1 (en) * 1992-09-01 1993-09-09 Fa. Carl Freudenberg, 69469 Weinheim, De
DE4229110C1 (en) * 1992-09-01 1993-10-07 Freudenberg Carl Fa Device for the temporary storage and metered feeding of volatile fuel components located in the free space of a tank system into the intake pipe of an internal combustion engine
US5265842A (en) * 1992-10-01 1993-11-30 Federal-Mogul Corporation Emission control metering valve
US5237980A (en) * 1992-12-02 1993-08-24 Siemens Automotive Limited On-board fuel vapor recovery system having improved canister purging
US5507176A (en) * 1994-03-28 1996-04-16 K-Line Industries, Inc. Evaporative emissions test apparatus and method
US5644072A (en) * 1994-03-28 1997-07-01 K-Line Industries, Inc. Evaporative emissions test apparatus and method
US5630403A (en) * 1996-06-13 1997-05-20 Siemens Electric Limited Force-balanced sonic flow emission control valve
US5878725A (en) * 1997-10-07 1999-03-09 Borg-Warner Automotive, Inc. Canister vent/purge valve
US6681749B2 (en) 2001-11-13 2004-01-27 Raymond B. Bushnell Vapor fueled engine
US6983894B2 (en) * 2002-02-13 2006-01-10 Siemens Vdo Automotive Inc. Piezo-electrically actuated canister purge valve with a hydraulic amplifier
US6907866B2 (en) * 2003-11-11 2005-06-21 Vapor Fuel Technologies, Inc. Vapor fueled engine
US7028675B2 (en) * 2003-11-11 2006-04-18 Vapor Fuel Technologies, Inc. Vapor fueled engine
US20080032245A1 (en) * 2003-11-11 2008-02-07 Vapor Fuel Technologies, Llc Fuel utilization
US7631637B2 (en) * 2006-06-01 2009-12-15 Vapor Fuel Technologies, Llc System for improving fuel utilization
US20070277790A1 (en) * 2006-06-01 2007-12-06 Raymond Bryce Bushnell System for improving fuel utilization

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2066360A (en) * 1979-12-27 1981-07-08 Ford Motor Co Control of purging of fuel vapour storing containers
DE3519292A1 (en) * 1985-05-30 1986-12-04 Robert Bosch Gmbh, 7000 Stuttgart DISPENSING SYSTEM FOR INITIATING VAPORIZED FUEL INTO AN INTERNAL COMBUSTION ENGINE

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5922066B2 (en) * 1979-03-08 1984-05-24 日産自動車株式会社 Evaporated fuel processing device for internal combustion engine
JPS5762955A (en) * 1980-08-28 1982-04-16 Honda Motor Co Ltd Device employed in internal combustion engine for preventing escape of vaporized fuel
JPS58110853A (en) * 1981-12-25 1983-07-01 Honda Motor Co Ltd Vaporized fuel controlling apparatus for internal-combustion engine with supercharger
US4467269A (en) * 1982-10-26 1984-08-21 Gte Automatic Electric Inc. Start-up circuit for negative inductance multiplier
JPS61175251A (en) * 1985-01-31 1986-08-06 Toyota Motor Corp Fuel-pressure controller for fuel injection type internal-combustion engine
US4628887A (en) * 1985-02-28 1986-12-16 Canadian Fram Limited Automatically opening canister purge solenoid valve
US4703737A (en) * 1986-07-31 1987-11-03 Bendix Electronics Limited Vapor control valve and system therefor
JPH0718390B2 (en) * 1986-09-26 1995-03-06 日産自動車株式会社 Fuel evaporative gas purge amount control device
US4809667A (en) * 1986-10-29 1989-03-07 Toyota Jidosha Kabushiki Kaisha Apparatus for controlling amount of fuel-vapor purged from canister to intake air system
US4872439A (en) * 1987-02-02 1989-10-10 Toyota Jidosha Kabushiki Kaisha Device for preventing outflow of a fuel vapor from a fuel tank
US4901902A (en) * 1987-02-17 1990-02-20 Huron/St. Clair Company Longitudinal slat for luggage carrier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2066360A (en) * 1979-12-27 1981-07-08 Ford Motor Co Control of purging of fuel vapour storing containers
DE3519292A1 (en) * 1985-05-30 1986-12-04 Robert Bosch Gmbh, 7000 Stuttgart DISPENSING SYSTEM FOR INITIATING VAPORIZED FUEL INTO AN INTERNAL COMBUSTION ENGINE

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991017353A1 (en) * 1990-05-01 1991-11-14 Siemens Aktiengesellschaft Carbon canister purge system
EP0495161A1 (en) * 1991-01-11 1992-07-22 Firma Carl Freudenberg Device for temporary storing and feeding measured quantities of evaporated fuel from the free space of a tank in the intake manifold of an internal combustion engine
FR2671597A1 (en) * 1991-01-16 1992-07-17 Eaton Sa Monaco Solenoid valve with variable passage cross-section
WO1992017698A1 (en) * 1991-03-28 1992-10-15 Siemens Aktiengesellschaft Diagnostic system for canister purge system
EP0546247A1 (en) * 1991-12-04 1993-06-16 Firma Carl Freudenberg Device for feeding measured quantities of volatile fuel components to the intake conduit of an internal combustion machine
DE4205101A1 (en) * 1992-02-20 1993-08-26 Mann & Hummel Filter Controlled dosing of fuel vapour into IC engine - using double action control valve to shut off when engine is off and to restrict fuel vapour release at idling speed
DE4205101C2 (en) * 1992-02-20 1998-02-19 Mann & Hummel Filter Process for the temporary storage and metered feeding of the fuel vapors located in the free space of a tank system into the intake pipe of an internal combustion engine
FR2706566A1 (en) * 1993-06-16 1994-12-23 Sagem Allumage Valve for a solenoid valve, and a circuit for recycling petrol vapors comprising such a valve.
EP0631075A1 (en) * 1993-06-16 1994-12-28 SAGEM ALLUMAGE Société Anonyme Electro-magnetic double seat valve, and recirculation circuit for petrol vapor
JPH07139643A (en) * 1993-06-16 1995-05-30 Sagem Allumage Sa Electric gate valve and gasoline-vapor circulating circuit with electric gate valve
WO2001073283A1 (en) * 2000-03-24 2001-10-04 Robert Bosch Gmbh Tank ventilation system for a motor vehicle and method for operating a system of this type

Also Published As

Publication number Publication date
DE58901156D1 (en) 1992-05-21
ES2030938T3 (en) 1992-11-16
BR8904486A (en) 1990-04-24
ATE75004T1 (en) 1992-05-15
JPH02256862A (en) 1990-10-17
US4953514A (en) 1990-09-04
EP0357882A3 (en) 1990-11-07
EP0357882B1 (en) 1992-04-15
DE3830722C2 (en) 1991-08-01
JPH0432221B2 (en) 1992-05-28
DE3830722A1 (en) 1990-03-15

Similar Documents

Publication Publication Date Title
EP0357882B1 (en) Device for feeding measured quantities of volatile fuel components to the intake conduit of an internal-combustion engine
EP0325698B1 (en) Device for feeding measured quantities of volatile fuel components to the intake conduit of an internal-combustion engine
EP0474803B1 (en) Vapour venting system for vehicle fuel tanks and process for checking system operability
DE4124465C2 (en) Tank ventilation system and motor vehicle with such and method and device for checking the functionality of such
DE4427688C2 (en) Method for checking the functionality of a tank ventilation system for a motor vehicle
DE2947940C2 (en) Control device for the fuel supply to an internal combustion engine
DE4241274C2 (en) Device for feeding the vapors located in the free space of a fuel tank into the intake pipe of an internal combustion engine
DE102016210579A1 (en) METHOD FOR DIAGNOSIS OF LEAKAGE AFTER BLEEDING FLOW CONTROL PANEL
DE10330106B4 (en) Failure detection device for an internal combustion engine
DE2245029A1 (en) METHOD AND DEVICE FOR EXHAUST GAS DETOXIFICATION FROM INTERNAL COMBUSTION MACHINERY
DE102018218679A1 (en) Active canister purge system and method of controlling the same
DE102008000691A1 (en) Method and device for monitoring a supply air system of an internal combustion engine
EP0546247B1 (en) Device for feeding measured quantities of volatile fuel components to the intake conduit of an internal combustion machine
EP1087114A1 (en) Method for controlling the regeneration of a particulate filter
DE3108374C2 (en) Internal combustion engine with cylinders that can be switched off
DE4114031A1 (en) ELECTRONIC CONTROL UNIT FOR A COMBUSTION ENGINE
DE69400243T2 (en) DEVICE FOR RECOVERY OF VAPORS LEAKING FROM THE FUEL TANK OF A MOTOR VEHICLE
EP0635633B1 (en) Method for monitoring a fuel tank aeration system trapping fuel vapours and feeding them into an internal combustion engine
DE4312721A1 (en) Tank venting system and method and device for testing the functioning performance of a tank venting valve
DE4129297C2 (en) Device for supplying a fuel additive for an internal combustion engine
DE2414761A1 (en) PROCEDURE TO REDUCE THE POISONOUS CONTENT IN EXHAUST GAS
DE4100659C1 (en)
DE3151111C2 (en) Arrangement for regulating the air-fuel ratio of an internal combustion engine
DE102020123759B4 (en) Method for operating a tank ventilation device
DE69307676T2 (en) Electrically controlled valve for canister recycling system

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT DE ES FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT DE ES FR GB IT

17P Request for examination filed

Effective date: 19900927

17Q First examination report despatched

Effective date: 19910910

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed
AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE ES FR GB IT

REF Corresponds to:

Ref document number: 75004

Country of ref document: AT

Date of ref document: 19920515

Kind code of ref document: T

REF Corresponds to:

Ref document number: 58901156

Country of ref document: DE

Date of ref document: 19920521

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2030938

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980417

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980424

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19980427

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980518

Year of fee payment: 10

Ref country code: ES

Payment date: 19980518

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 19981218

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990531

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19990601

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000131

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20020204

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050531