EP1020635B1 - Tubulure d'air d'admission pour moteurs diesel - Google Patents

Tubulure d'air d'admission pour moteurs diesel Download PDF

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Publication number
EP1020635B1
EP1020635B1 EP99121637A EP99121637A EP1020635B1 EP 1020635 B1 EP1020635 B1 EP 1020635B1 EP 99121637 A EP99121637 A EP 99121637A EP 99121637 A EP99121637 A EP 99121637A EP 1020635 B1 EP1020635 B1 EP 1020635B1
Authority
EP
European Patent Office
Prior art keywords
exhaust gas
intake pipe
control valve
inlet
pipe portion
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
EP99121637A
Other languages
German (de)
English (en)
Other versions
EP1020635A3 (fr
EP1020635A2 (fr
Inventor
Andreas Trawinski
Heinrich Dismon
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.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP1020635A2 publication Critical patent/EP1020635A2/fr
Publication of EP1020635A3 publication Critical patent/EP1020635A3/fr
Application granted granted Critical
Publication of EP1020635B1 publication Critical patent/EP1020635B1/fr
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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission
    • 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
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • 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
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake 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
    • 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
    • F02M26/72—Housings
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/1034—Manufacturing and assembling intake systems
    • F02M35/10347—Moulding, casting or the like
    • 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
    • F02M26/50—Arrangements or methods for preventing or reducing deposits, corrosion or wear caused by impurities
    • 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
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/69—Lift valves, e.g. poppet valves having two or more valve-closing members
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/104—Intake manifolds
    • F02M35/1045—Intake manifolds characterised by the charge distribution between the cylinders/combustion chambers or its homogenisation

Definitions

  • the invention relates to a Brennluftansaugrohrabrough for diesel internal combustion engines according to the preamble of patent claim 1.
  • a diesel engine is usually operated in the so-called excess air mode, in which more air is drawn into the combustion chambers of the engine than is actually necessary for the combustion of the fuel injected into the chambers.
  • exhaust gas recirculation in a diesel engine is basically based on replacing at least part of this excess air with recirculated exhaust gases to improve the quality of the exhaust gases emitted from the engine and to reduce the level of harmful pollutants in the exhaust gases.
  • a recirculation exhaust gas amount should be provided which depends on the amount of excess air drawn in the existing operating conditions of the engine.
  • the lower the load of the diesel engine the greater the proportion of the sucked excess air, ie, the higher the load of the diesel engine, the lower is proportional to the intake air, the excess air.
  • the excess air amount introduced into the combustion chambers of the engine decreases as the load of the engine increases. Therefore, for exhaust gas recirculation in which the recirculation exhaust gas amount changes according to the excess air amount, it is necessary to control the recirculation exhaust gas amount so that the exhaust gas recirculation ratio decreases in accordance with an increase in engine load (the recirculation exhaust gas amount divided by the recirculation exhaust gas amount plus the intake air amount is defined) and vice versa.
  • the exhaust gas recirculation should be chosen so that the recirculated exhaust gas component decreases compared to the fresh air amount, from the point of view of simple control, the exhaust gas component should behave almost directly proportional to the change of the actuator.
  • a proportionality is impossible in view of the very low pressure differences, especially at low engine load. For this reason, it is difficult at low load to ensure sufficient exhaust gas recirculation.
  • valves are coupled together so that when increasing the fresh air flow rate, the amount of exhaust gas decreases and vice versa.
  • the choice of different valves allows a mutual mechanical coupling, which allows an extremely compact unit.
  • valve rod has two valve discs, which cooperate with two valve seats, are adjusted simultaneously and the valve seats open and close, and so control the connection between the exhaust inlet and outlet, the Exhaust outlet is connected directly to an air intake pipe of the internal combustion engine. Again, extreme pollution can occur because the valve rod protrudes directly into the air intake pipe.
  • EP-A-780,565 discloses a Brenn Kunststoffansaugrohrabrough the receiving recesses, in which an exhaust gas recirculation feed insert and an exhaust gas recirculation control valve insert used and held by P Mattsitzabroughen. This embodiment is also sensitive to extreme contamination.
  • the present invention seeks to design a generic Brenn Kunststoffansaugrohrabrough for diesel internal combustion engines such that a cost-effective structural design in cast execution and in addition an improved, protected against dirt execution can be achieved.
  • Fig. 1 shows a section of a Brennluftansaugrohrabitess 1 for diesel internal combustion engines, with an air flow throttling air damper 2 and downstream therefrom exhaust gas recirculation 3, which is controlled by an exhaust gas recirculation control valve 4, wherein the air damper 2 and control valve 4 in accordance with control signals by electrical or pneumatic actuators 5, 6 are operated.
  • the intake pipe 1 is formed as a cast housing 7 and receiving recesses 8, 9, in which an exhaust gas recirculation insert 10 and an exhaust gas recirculation control valve insert 11 is inserted and held by Pchromatsitzabismeen 12, 13 in the receiving recesses 8, 9.
  • the receiving recesses 8, 9 are connected to each other via a housing aperture 14, wherein the housing aperture 14 is closed by a Ein effetsabitesskragen 15 of the exhaust gas recirculation feed insert 10 with respect to the Brennluftansaugrohrabrough 1 and the introduction section is an exhaust gas inlet funnel 16 forms, which merges into an opening in the direction of combustion air flow in the intake pipe 1 exhaust gas inlet section 17.
  • the receiving recess 9 for the control valve 4 has a housing opening 18, which merges into a connection section 19 for an exhaust gas supply, not shown, and that the housing opening 18 is closed by a Ein effetsabitesskragen 20 of the control valve insert 11.
  • the introduction section forms an exhaust gas inlet funnel 21, which merges into a valve chamber 22.
  • the valve chamber 22 is connected via a double valve assembly 23 with a housing chamber 24 formed by the inlet section collar 15 and 20 and the Pajisitzabrough 13 of the control valve insert 11 closed receiving recess 9.
  • the control valve insert 11 has a relative to the housing chamber 24 completed actuating chamber 25 which is sealed from the actuator 6 with respect to the atmosphere, wherein adjusting rods 26 and 27 of the double valve assembly 23 and the adjusting device 6 project respectively into the actuating chamber 25 and contact each other there.
  • FIG. 1 the receiving recess 9 is arranged with the control valve insert 11 parallel to the Brenn povertyansaugrohrabites 1, whereas the exploded view of FIG. 2 shows an arrangement at a right angle to the intake pipe 1. Otherwise, the embodiment corresponds to that of FIG. 1 and is provided with the same numbering of the components.
  • the embodiment according to the invention enables an improved uniform distribution of the recirculated exhaust gas to the individual cylinders of the internal combustion engine.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Claims (5)

  1. Section de tubulure d'admission d'air pour moteurs Diesel, comprenant un papillon d'étranglement (2) du débit d'air et une arrivée de recirculation des gaz d'échappement (3) en aval de ce dernier, contrôlée par une soupape pilote (4) de recirculation des gaz d'échappement, le papillon (2) et la soupape pilote (4) étant actionnés en fonction de signaux de commande par des dispositifs de réglage (5, 6) électriques ou pneumatiques, la section de tubulure d'admission (1) étant réalisée sous forme de corps coulé (7) et présentant des creux de réception (8, 9) dans lesquels sont mises en place une garniture d'arrivée de recirculation des gaz d'échappement (10) et une garniture de soupape pilote de recirculation des gaz d'échappement (11) et sont maintenues au moyen de sections d'ajustement de précision (12, 13), les creux de réception (8, 9) étant reliés entre eux par l'intermédiaire d'une percée de corps (14), caractérisée en ce que la percée de corps (14) est fermée par rapport à la section de tubulure d'admission d'air (1) par un collet de section d'arrivée (15) de la garniture d'arrivée de recirculation des gaz d'échappement (10) et la section d'arrivée forme un entonnoir d'entrée des gaz d'échappement (16), qui se prolonge par une section d'arrivée des gaz d'échappement (17) débouchant dans la section de tubulure d'admission (1) dans la direction d'écoulement de l'air comburant.
  2. Section de tubulure d'admission suivant la revendication 1, caractérisée en ce que le creux de réception (9) pour la soupape pilote (4) présente une percée de corps (18) qui se prolonge par une section de raccordement (19) pour une conduite d'arrivée des gaz d'échappement.
  3. Section de tubulure d'admission suivant la revendication 2, caractérisée en ce que la percée de corps (18) est fermée par un collet de section d'arrivée (20) de la garniture de soupape pilote (11), la section d'arrivée formant un entonnoir d'entrée des gaz d'échappement (21) qui se prolonge par une chambre de soupape (22).
  4. Section de tubulure d'admission suivant la revendication 3, caractérisée en ce que la chambre de soupape (22) est reliée par l'intermédiaire d'un double agencement de soupape (23) à un compartiment de corps (24) formé par le creux de réception (9) fermé par les collets de section d'arrivée (15 et 20) et par la section d'ajustement de précision (13) de la garniture de soupape pilote (11).
  5. Section de tubulure d'admission suivant la revendication 4, caractérisée en ce que la garniture de soupape pilote (11) présente un compartiment de commande (25), fermé par rapport au compartiment de corps (24), qui est étanchéifié par rapport à l'atmosphère par le dispositif de réglage (6), des tiges de réglage (26, 27) du double agencement de soupape (23) et du dispositif de réglage (6) pénétrant chacune dans le compartiment de commande (25) et y étant en contact mutuel.
EP99121637A 1999-01-15 1999-10-30 Tubulure d'air d'admission pour moteurs diesel Expired - Lifetime EP1020635B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19901318 1999-01-15
DE19901318A DE19901318A1 (de) 1999-01-15 1999-01-15 Brennluftansaugrohrabschnitt für Dieselbrennkraftmaschinen

Publications (3)

Publication Number Publication Date
EP1020635A2 EP1020635A2 (fr) 2000-07-19
EP1020635A3 EP1020635A3 (fr) 2000-10-18
EP1020635B1 true EP1020635B1 (fr) 2006-02-01

Family

ID=7894326

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99121637A Expired - Lifetime EP1020635B1 (fr) 1999-01-15 1999-10-30 Tubulure d'air d'admission pour moteurs diesel

Country Status (2)

Country Link
EP (1) EP1020635B1 (fr)
DE (2) DE19901318A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10042247C5 (de) * 2000-08-29 2006-09-14 Robert Bosch Gmbh Mischeinheit für Gasströme an einer Verbrennungskraftmaschine
DE10210971A1 (de) * 2002-03-13 2003-09-25 Daimler Chrysler Ag Vorrichtung zur Abgasrückführung
JP4192763B2 (ja) * 2003-11-07 2008-12-10 株式会社日立製作所 電子式ｅｇｒガス制御装置
DE102009018378A1 (de) 2009-04-18 2010-10-21 Mahle International Gmbh Saugmodul mit integrierter Abgasrückführung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5654947A (en) * 1979-10-09 1981-05-15 Toyota Motor Corp Intake and egr controller for diesel engine
DE4338192C2 (de) * 1993-11-09 1998-03-19 Pierburg Ag Elektromagnetisches Steuerventil für Abgasrückführung
EP0753656B1 (fr) * 1995-07-13 1998-04-08 Aisan Kogyo Kabushiki Kaisha Recirculation de gaz d'échappement
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

Also Published As

Publication number Publication date
DE19901318A1 (de) 2000-07-20
DE59913094D1 (de) 2006-04-13
EP1020635A3 (fr) 2000-10-18
EP1020635A2 (fr) 2000-07-19

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