EP0357882B1 - Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine - Google Patents

Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine Download PDF

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Publication number
EP0357882B1
EP0357882B1 EP89109821A EP89109821A EP0357882B1 EP 0357882 B1 EP0357882 B1 EP 0357882B1 EP 89109821 A EP89109821 A EP 89109821A EP 89109821 A EP89109821 A EP 89109821A EP 0357882 B1 EP0357882 B1 EP 0357882B1
Authority
EP
European Patent Office
Prior art keywords
valve
arrangement according
shut
intake pipe
combustion engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89109821A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0357882A2 (de
EP0357882A3 (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/de
Publication of EP0357882A2 publication Critical patent/EP0357882A2/de
Publication of EP0357882A3 publication Critical patent/EP0357882A3/de
Application granted granted Critical
Publication of EP0357882B1 publication Critical patent/EP0357882B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • 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 device 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.
  • the auxiliary valve 13 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.
  • 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 shut-off valve is interrupted by the action of the spring, an undosed introduction of fuel vapors into the intake pipe is excluded.

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)
  • Fuel-Injection Apparatus (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP89109821A 1988-09-09 1989-05-31 Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine Expired - Lifetime EP0357882B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89109821T ATE75004T1 (de) 1988-09-09 1989-05-31 Vorrichtung zum dosierten einspeisen fluechtiger kraftstoffbestandteile in das ansaugrohr einer brennkraftmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830722A DE3830722A1 (de) 1988-09-09 1988-09-09 Vorrichtung zum dosierten einspeisen fluechtiger kraftstoffbestandteile in das ansaugrohr einer brennkraftmaschine
DE3830722 1988-09-09

Publications (3)

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

Family

ID=6362641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109821A Expired - Lifetime EP0357882B1 (de) 1988-09-09 1989-05-31 Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine

Country Status (7)

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

Families Citing this family (33)

* 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 (de) * 1990-02-08 1999-12-02 Bosch Gmbh Robert Tankentlüftungsanlage für ein Kraftfahrzeug und Verfahren zum Überprüfen deren Funktionstüchtigkeit
US5199404A (en) * 1990-03-08 1993-04-06 Siemens Automotive Limited Regulated flow canister purge system
US5115785A (en) * 1990-05-01 1992-05-26 Siemens Automotive Limited Carbon 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 (de) * 1990-07-20 1992-01-23 Bosch Gmbh Robert Ventil zum dosierten zumischen von verfluechtigtem kraftstoff zum kraftstoffluftgemisch einer brennkraftmaschine
DE4035158C1 (es) * 1990-11-06 1992-01-09 Fa. Carl Freudenberg, 6940 Weinheim, De
DE4100659C1 (es) * 1991-01-11 1992-05-14 Fa. Carl Freudenberg, 6940 Weinheim, De
FR2671597B1 (fr) * 1991-01-16 1993-07-09 Eaton Sa Monaco Electrovanne a section de passage variable.
US5069188A (en) * 1991-02-15 1991-12-03 Siemens Automotive Limited Regulated canister purge solenoid valve having improved purging at engine idle
US5191870A (en) * 1991-03-28 1993-03-09 Siemens Automotive Limited Diagnostic system for canister purge system
JP2935249B2 (ja) * 1991-05-31 1999-08-16 本田技研工業株式会社 内燃エンジンの始動燃料制御装置
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
DE4139946C1 (es) * 1991-12-04 1993-02-04 Fa. Carl Freudenberg, 6940 Weinheim, De
DE4205101C2 (de) * 1992-02-20 1998-02-19 Mann & Hummel Filter Verfahren zum vorübergehenden Speichern und dosierten Einspeisen der im Freiraum einer Tankanlage befindlichen Kraftstoffdämpfe in das Ansaugrohr einer Brennkraftmaschine
DE4229110C1 (de) * 1992-09-01 1993-10-07 Freudenberg Carl Fa Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen von im Freiraum einer Tankanlage befindlichen flüchtigen Kraftstoffbestandteilen in das Ansaugrohr einer Verbrennungskraftmaschine
DE4229105C1 (es) * 1992-09-01 1993-09-09 Fa. Carl Freudenberg, 69469 Weinheim, De
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
FR2706566B1 (fr) * 1993-06-16 1995-09-01 Sagem Allumage Clapet pour électrovanne, et circuit de recyclage de vapeurs d'essence comportant un tel clapet.
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
DE10014739A1 (de) * 2000-03-24 2001-10-11 Bosch Gmbh Robert Tankentlüftungsanlage für ein Kraftfahrzeug und Verfahren zum Betreiben einer solchen
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
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
US6907866B2 (en) * 2003-11-11 2005-06-21 Vapor Fuel Technologies, Inc. Vapor fueled engine
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

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
JPS5922066B2 (ja) * 1979-03-08 1984-05-24 日産自動車株式会社 内燃機関の蒸発燃料処理装置
US4326489A (en) * 1979-12-27 1982-04-27 Ford Motor Company Proportional flow fuel vapor purge control device
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 (ja) * 1981-12-25 1983-07-01 Honda Motor Co Ltd 過給機付内燃機関における蒸発燃料制御装置
US4467269A (en) * 1982-10-26 1984-08-21 Gte Automatic Electric Inc. Start-up circuit for negative inductance multiplier
JPS61175251A (ja) * 1985-01-31 1986-08-06 Toyota Motor Corp 燃料噴射内燃機関の燃料圧力制御装置
US4628887A (en) * 1985-02-28 1986-12-16 Canadian Fram Limited Automatically opening canister purge solenoid valve
DE3519292A1 (de) * 1985-05-30 1986-12-04 Robert Bosch Gmbh, 7000 Stuttgart Abgabeanlage zur einleitung von verfluechtigtem kraftstoff in eine brennkraftmaschine
US4703737A (en) * 1986-07-31 1987-11-03 Bendix Electronics Limited Vapor control valve and system therefor
JPH0718390B2 (ja) * 1986-09-26 1995-03-06 日産自動車株式会社 燃料蒸発ガスのパ−ジ量制御装置
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

Also Published As

Publication number Publication date
DE3830722A1 (de) 1990-03-15
BR8904486A (pt) 1990-04-24
US4953514A (en) 1990-09-04
DE3830722C2 (es) 1991-08-01
ES2030938T3 (es) 1992-11-16
DE58901156D1 (de) 1992-05-21
JPH0432221B2 (es) 1992-05-28
JPH02256862A (ja) 1990-10-17
ATE75004T1 (de) 1992-05-15
EP0357882A2 (de) 1990-03-14
EP0357882A3 (en) 1990-11-07

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