EP0507996A2 - Dispositif pour l'introduction dosée de gaz d'échappement dans la chambre de combustion d'un moteur à combustion interne - Google Patents

Dispositif pour l'introduction dosée de gaz d'échappement dans la chambre de combustion d'un moteur à combustion interne Download PDF

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Publication number
EP0507996A2
EP0507996A2 EP91121128A EP91121128A EP0507996A2 EP 0507996 A2 EP0507996 A2 EP 0507996A2 EP 91121128 A EP91121128 A EP 91121128A EP 91121128 A EP91121128 A EP 91121128A EP 0507996 A2 EP0507996 A2 EP 0507996A2
Authority
EP
European Patent Office
Prior art keywords
adjusting
valve
drive shaft
adjusting disc
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.)
Withdrawn
Application number
EP91121128A
Other languages
German (de)
English (en)
Other versions
EP0507996A3 (en
Inventor
Sebastian Zabeck
Andreas Sausner
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
Publication of EP0507996A2 publication Critical patent/EP0507996A2/fr
Publication of EP0507996A3 publication Critical patent/EP0507996A3/de
Withdrawn legal-status Critical Current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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/63—Systems for actuating EGR valves the EGR valve being directly controlled by an operator
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/55—Systems for actuating EGR valves using vacuum actuators
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
    • 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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
    • 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
    • F02D9/02—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning induction conduits
    • F02D2009/0201—Arrangements; Control features; Details thereof
    • F02D2009/0276—Throttle and EGR-valve operated together

Definitions

  • the invention relates to a device for metered feeding of burned gases into the combustion chamber of an internal combustion engine with an intake pipe, in which a throttle valve is arranged and an exhaust pipe, the intake pipe and the exhaust pipe being connected by a line to a check valve contained therein, and in which Intake pipe, the throttle valve is arranged on a drive shaft.
  • Such a device is known from the manual "Autoelektrik, Autoelektronik am Otto engine” from Bosch.
  • the throttle valve and the check valve are provided with drive means which can be actuated independently of one another.
  • the known device is extremely expensive to manufacture. It is also characterized by an unsatisfactory operational reliability. It is also characterized by an unsatisfactory operational safety and functionality.
  • the invention is based on the object of further developing a device of the type mentioned in such a way that substantially less operational reliability and greater functionality are obtained with less cost of manufacture.
  • the check valve comprises an actuator which can be actuated by the drive shaft.
  • the device can be manufactured and assembled inexpensively. It is also characterized by good usage properties over a long period of use, and there is already a significant reduction in polluting exhaust gas emissions if electronic control devices are not used in addition. Due to the compact size and the economic manufacturability, use of the device according to the invention is recommended in particular for equipping internal combustion engines that are used in small, inexpensive motor vehicles.
  • the closing member and the drive shaft can be connected to one another by a connecting device, the connecting device being formed by a one-sided positive guide. It is advantageous here that with only one-sided positive guidance of the closing member by the drive shaft of the throttle valve, an obstruction of the throttle valve movement in the event of movement disorders of the closing member is effectively prevented. A reset of the throttle valve by a rotary movement of the throttle valve shaft is guaranteed at all times, so that the operational safety of the subsequent internal combustion engine and the motor vehicle is not impaired.
  • the valve is designed as a rotary slide valve, with a valve housing and two adjusting discs mounted in the valve housing, which touch each other relatively rotatably and which are each provided with at least one passage opening that can be brought into alignment outside of their axis of rotation, the first adjusting disc is rotatable by the drive shaft and the second adjusting disc is non-rotatably mounted in the valve housing. Due to the comparatively high thermal load on the check valve, the materials of the device must be selected accordingly.
  • a gray cast iron alloy is particularly suitable for the valve housing and a metallic or ceramic material for the two adjusting disks.
  • the valve has a particularly small design, consisting of a few individual parts, and that the drive of the rotary valve by the drive shaft, on which the throttle valve is also mounted, is particularly simple. Temperature-resistant seals must be provided to seal the drive shaft. The size of the passage opening can also be adjusted particularly sensitively to the respective operating state of the internal combustion engine. The small design and the few individual parts used result in a low weight of the device and low manufacturing costs.
  • the second adjusting disk can be mounted so as to be movable in the direction of the axis of rotation and can be secured against rotation and sealed by a membrane with respect to the valve housing.
  • the material from which the membrane is made must also be heat-resistant due to the exhaust gas temperatures.
  • the rotatable mounting of the first adjusting disc, relative to the second adjusting disc, which is mounted in the housing in a manner fixed against relative rotation, ensures that the two adjusting discs are guided properly, even over a long service life. Even less wear on one of the two adjusting disks does not impair the sealing in this area in that the second adjusting disk is supported in the valve housing by means of a compression spring and pressed against the first adjusting disk.
  • a membrane is provided, which is clamped, for example, between the two valve housing parts and is fixed gas-tight on the second adjusting disk. If the through openings of the two adjusting disks are closed, no exhaust gas gets into the Intake pipe of the internal combustion engine.
  • the spring characteristic of the compression spring if it is designed as a helical compression spring, can be adapted particularly easily to the use of specific characteristic values with regard to the contact pressure. This gives excellent performance characteristics over a long service life of the valve.
  • the two adjusting discs are rotatably supported one inside the other.
  • This can be achieved, for example, by means of a bearing journal which is connected in one piece to the first adjusting disk and which, if necessary, for example in order to compensate for manufacturing tolerances, can be made spherical.
  • the bearing journal can be mounted in a journal journal of the second adjusting disk.
  • a further embodiment can consist in that the bearing journal is integrally connected to the second adjusting disk and is mounted in a journal journal of the first adjusting disk.
  • both the first and the second adjusting disc can be provided with a bearing journal receptacle, a separate bearing journal being arranged in the axial direction coaxially to the axis of rotation and connecting the two adjusting discs to one another.
  • This configuration ensures good rotatability of the two adjusting disks relative to one another and a good, gas-tight fixing of the two adjusting disks to one another outside the passage openings.
  • At least one of the two adjusting disks in the area of the mutual contact surfaces can be provided with a temperature-resistant, friction-reducing surface coating.
  • An intermediate plate with a coated surface for example, meets these requirements.
  • the washer can be made of ceramic material, for example, which can be relatively non-rotatably and sealingly attached to one of the two adjusting disks.
  • the connecting device comprises a closing device with a vacuum box which, if necessary, transfers the first adjusting disk in the direction of the closed position of the check valve. This is advantageously done against the spring force of a torsion spring. This ensures that the device can be closed regardless of the position of the throttle valve. For example, there is the possibility of preventing exhaust gas recirculation into the intake pipe when the internal combustion engine is cold, or at least reducing it continuously.
  • a suction pump and a vacuum switching valve can be assigned to the vacuum box.
  • the vacuum switching valve can be connected to the engine control in a signal-conducting manner. It is used to control the vacuum on the vacuum can, the vacuum can be applied by suction pipe vacuum or a suction pump. Due to more complicated circuits, suction pressure modulation is also possible for intermediate positions between the fully open passage cross section and the closed passage cross section.
  • An advantage of this embodiment is that the vacuum box is arranged outside the actual valve, which ensures easy manufacture. When using the device on internal combustion engines that provide a sufficient vacuum in the intake pipe, the vacuum can can be pressurized by the intake pipe. The advantage here is that the device is more economical to manufacture.
  • a device for the metered feeding of burned gases into the combustion chamber of an internal combustion engine 5 is shown.
  • a feed line 2 into the intake pipe 6 of the internal combustion engine 5 is shown in the area of the throttle valve 3, the feed line 2 being connected to the check valve 1.
  • a line 8 is provided, which on the one hand is assigned to the exhaust pipe 7 and on the other hand is connected to the check valve 1.
  • the feed line 2 to the intake pipe 6 of the internal combustion engine 5 can be closed by the shut-off valve 1 and / or, regardless of the position of the shut-off valve 1, by a connecting device 22 which is assigned to a vacuum box 17 which, as shown here, also connects to a suction pump 19 Intermediate vacuum switching valve 23 is connected.
  • a throttle valve 3 mounted on a drive shaft 4 is arranged in the intake pipe 6.
  • the check valve 1 comprises, as an actuator, a rotary slide valve which can be actuated by the drive shaft 4 with the connecting device 22 attached to it.
  • the connecting device 22 is formed by a one-sided positive guidance. This ensures a functional decoupling of the device from the movement of the throttle valve. If the throttle valve 3 is moved into the open position by the drive shaft 4, the first adjusting disk 10 is also rotated by the connecting device in such a way that the opening cross section through the check valve 1 increases.
  • the throttle valve opens the shut-off valve against the spring force of a torsion spring 20, which also transfers the rotary valve to the closed position when it is functioning properly.
  • the rotary slide valve essentially consists of two adjusting disks 10, 11 which are arranged and mounted in the valve housing 9 and touch each other in a relatively rotatable manner. Passage openings 10.1, 11.1 are arranged in the adjusting disks 10, 11, which are of different sizes depending on the respective application and can have different shapes. According to this embodiment, it is provided that the first adjusting disc 10 is rotatably mounted in the valve housing 9 by the drive shaft 4 relative to the second adjusting disc 11. The first adjusting disc 10 is provided with an intermediate disc 16, which is designed as a sealing disc made of ceramic material.
  • the intermediate disk 16 can be provided with a surface coating 15.
  • the two adjusting disks 10, 11 rest against one another outside the at least partially overlapping through openings 10.1, 11.1 in a rotationally movable and gas-tight manner.
  • a membrane made of temperature-resistant material is provided, which is clamped between the two housing halves and acts as an anti-rotation device for the second adjusting disk 11.
  • the second adjusting disk 11 and the membrane 13 are fixed to one another in a non-rotatable and gas-tight manner. This creates an excellent seal between the gas inlet and gas outlet when the through openings 10.1, 11.1 are closed.
  • the second adjusting disk 11 is supported in the direction of the axis of rotation 12 by means of a compression spring 14 on the valve housing 9 and is pressed against the first adjusting disk 10.
  • the two adjusting disks 10, 11 are arranged such that they can rotate with respect to one another via a bearing journal of the first adjusting disk 10 which is arranged axially to the axis of rotation and is mounted in a recess in the second adjusting disk 11.
  • a further spring is provided, which is designed as a torsion spring 20 and is suspended on the one hand in the valve housing 9 and on the other hand in the connecting device 22.
  • a seal 21 is provided between the drive shaft 4 and the valve housing 9, which seals the drive opening from the environment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP19910121128 1991-04-08 1991-12-10 Device for controlled introduction of exhaust gases into the combustion chamber of an internal combustion engine Withdrawn EP0507996A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4111240 1991-04-08
DE4111240A DE4111240C1 (fr) 1991-04-08 1991-04-08

Publications (2)

Publication Number Publication Date
EP0507996A2 true EP0507996A2 (fr) 1992-10-14
EP0507996A3 EP0507996A3 (en) 1993-02-03

Family

ID=6429016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910121128 Withdrawn EP0507996A3 (en) 1991-04-08 1991-12-10 Device for controlled introduction of exhaust gases into the combustion chamber of an internal combustion engine

Country Status (5)

Country Link
US (1) US5265578A (fr)
EP (1) EP0507996A3 (fr)
JP (1) JPH05118256A (fr)
BR (1) BR9201242A (fr)
DE (1) DE4111240C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19807463A1 (de) * 1998-02-24 1999-08-26 Mannesmann Vdo Ag Ansaugvorrichtung für eine Brennkraftmaschine

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE19504348C5 (de) * 1995-02-10 2006-06-22 Pierburg Gmbh Abgasrückführsteuerventil
JPH09228901A (ja) * 1995-12-21 1997-09-02 Denso Corp Ｅｇｒ制御弁およびそれを用いた排気ガス再循環装置
US7069919B1 (en) * 2005-01-06 2006-07-04 Caterpillar Inc Method and apparatus for controlling the ratio of ambient air to recirculated gases in an internal combustion engine
ES2305915T3 (es) * 2005-01-31 2008-11-01 Kwang Yang Motor Co., Ltd. Valvula de recurculacion de gases de escape para un vehiculo.
US7237531B2 (en) * 2005-06-17 2007-07-03 Caterpillar Inc. Throttle and recirculation valves having a common planetary drive
DE102006055226A1 (de) * 2006-11-21 2008-05-29 Pierburg Gmbh Abgassteuereinrichtung für eine Verbrennungskraftmaschine
JP4730447B2 (ja) * 2009-02-18 2011-07-20 株式会社デンソー 低圧ｅｇｒ装置
JP5287953B2 (ja) * 2011-04-27 2013-09-11 株式会社デンソー 低圧ｅｇｒ装置
JPWO2020195866A1 (fr) * 2019-03-25 2020-10-01

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048967A (en) * 1972-08-25 1977-09-20 Robert Bosch Gmbh System for detoxicating exhaust gases
US4231337A (en) * 1978-04-28 1980-11-04 Hitachi, Ltd. Air intake system for diesel engine
US4282846A (en) * 1978-08-23 1981-08-11 Aisan Industry Co., Ltd. Exhaust gas recirculating device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675633A (en) * 1969-01-20 1972-07-11 Nissan Motor Air-pollution preventive system for motor vehicles
US3610219A (en) * 1970-05-22 1971-10-05 Gen Motors Corp Exhaust gas recirculation control
JPS5122563B2 (fr) * 1972-03-02 1976-07-10
DE2241935C3 (de) * 1972-08-25 1981-07-16 Robert Bosch Gmbh, 7000 Stuttgart Anlage zur Abgasentgiftung
DE2539484A1 (de) * 1975-09-05 1977-03-10 Bosch Gmbh Robert Stellvorrichtung fuer ein ventil in einer abgasrueckfuehrleitung einer brennkraftmaschine
JPS54141924A (en) * 1978-04-25 1979-11-05 Aisan Ind Co Ltd Exhaust gas recycling device
JPS5548189A (en) * 1978-10-02 1980-04-05 Tadano Tekkosho Kk Method of obtaining work head response signal of crane
JPS6124683U (ja) * 1984-07-19 1986-02-14 ソニー株式会社 光検出装置
DE3722048A1 (de) * 1987-07-03 1989-01-12 Bosch Gmbh Robert Brennkraftmaschine, insbesondere ottomotor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048967A (en) * 1972-08-25 1977-09-20 Robert Bosch Gmbh System for detoxicating exhaust gases
US4231337A (en) * 1978-04-28 1980-11-04 Hitachi, Ltd. Air intake system for diesel engine
US4282846A (en) * 1978-08-23 1981-08-11 Aisan Industry Co., Ltd. Exhaust gas recirculating device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19807463A1 (de) * 1998-02-24 1999-08-26 Mannesmann Vdo Ag Ansaugvorrichtung für eine Brennkraftmaschine
WO1999043946A1 (fr) 1998-02-24 1999-09-02 Mannesmann Vdo Ag Dispositif d'admission pour moteur a combustion interne
US6443134B1 (en) 1998-02-24 2002-09-03 Mannesmann Vdo Ag Intake device for an internal combustion engine

Also Published As

Publication number Publication date
US5265578A (en) 1993-11-30
BR9201242A (pt) 1992-12-01
EP0507996A3 (en) 1993-02-03
DE4111240C1 (fr) 1992-06-04
JPH05118256A (ja) 1993-05-14

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