EP0764781B1 - Einlasskammer - Google Patents

Einlasskammer Download PDF

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Publication number
EP0764781B1
EP0764781B1 EP19960114588 EP96114588A EP0764781B1 EP 0764781 B1 EP0764781 B1 EP 0764781B1 EP 19960114588 EP19960114588 EP 19960114588 EP 96114588 A EP96114588 A EP 96114588A EP 0764781 B1 EP0764781 B1 EP 0764781B1
Authority
EP
European Patent Office
Prior art keywords
chamber
intake
reinforcing plate
intake chamber
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
EP19960114588
Other languages
English (en)
French (fr)
Other versions
EP0764781A3 (de
EP0764781A2 (de
Inventor
Akira Nakagome
Kenji Watanabe
Daiji Nagaoka
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.)
Isuzu Motors Ltd
Original Assignee
Isuzu Motors Ltd
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 Isuzu Motors Ltd filed Critical Isuzu Motors Ltd
Publication of EP0764781A2 publication Critical patent/EP0764781A2/de
Publication of EP0764781A3 publication Critical patent/EP0764781A3/de
Application granted granted Critical
Publication of EP0764781B1 publication Critical patent/EP0764781B1/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
    • 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
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10295—Damping means, e.g. tranquillising chamber to dampen air oscillations
    • 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
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F02M35/10026—Plenum chambers
    • F02M35/10052—Plenum chambers special shapes or arrangements of plenum chambers; Constructional details
    • 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
    • F02M35/10354—Joining multiple sections together
    • 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
    • F02M35/112—Intake manifolds for engines with cylinders all in one line
    • 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
    • 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

  • This invention relates to an intake chamber interposed between intake conduits each connected to a cylinder of a multiple-cylinder engine and an intake pipe.
  • an intake chamber is interposed between intake ports formed in a cylinder head and an intake pipe. Air which is purified by an air cleaner is supplied to this intake chamber through an intake pipe, and is then supplied into each cylinder through the intake conduit and the intake ports.
  • the intake chamber is interposed between one intake pipe and intake ports formed in a cylinder head, and has a complicated structure so as to supply intake air by dividing it into as many portions as the numer of the cylinders or the intake ports. Therefore, this intake chamber is generally produced by casting an aluminium alloy.
  • casting of one intake chamber, that is, a hollow body, into one unit needs a complicated casting process and invites a high cost of production, precision casting by die cysting by splitting the intake chamber into two segments has been employed in may cases.
  • an EGR gas introduction hole a blow-by gas introduction hole (PCV valve), etc, are disposed in many cases in this intake manifold and for this reason, the intake chamber, too, has a complicated structure.
  • PCV valve blow-by gas introduction hole
  • the intake chamber is often split into two segments and is later assembled so as to facilitate the casting process.
  • the two-segment intake chamber produced by die casting can be formed into a small thickness and moreover, has a large opening. Therefore, this intake chamber involves the problem that its rigidity is relatively low. Though it is of course possible to shape the intake chamber into a large thickness to secure a sufficient strength, the weight undesirably increases in such a case.
  • a natural frequency of the intake chamber coincides with the engine vibration at this time, resonance develops and the intake chamber undergoes large deformation as has been confirmed already, and this tendency is remarkable particularly in intake chambers having low rigidity. Deformation of the intake chamber due to resonance generates large emission noise and this noise promotes the engine noise.
  • Japanese Utility Model Application Kokai Publication No. 55-142630 proposes an intake inertia pipe.
  • this apparatus includes an intake pipe and an extension pipe connected to the intake pipe that are disposed in one chamber, but does not deal with deformation and vibration of the intake chamber.
  • Japanese Utility Model (Kokoku) Publication No. 63-35181 proposes an exhaust gas recirculation apparatus of an engine.
  • This apparatus comprises a throttle body, a surge tank, a connection pipe and an intake pipe but does not provide means for reducing the noise emitted in conjunction with the vibration noise of the engine, either.
  • Japanese Utility Model Application Kokai Publication No. 61-9525 proposes an apparatus wherein an intake throttle valve is disposed in an inlet pipe disposed in a surge tank, but this apparatus does not provide means for reducing the noise emitted due to vibration.
  • Japanese Utility Model Application Kokai Publication No. 2-18648 proposes an EGR passage structure of an engine.
  • this reference does not propose the technical concept of dividing the surge tank into two segments and sandwiching a reinforcing plate between flange surfaces formed on their openings for reinforcement.
  • references described above do not teach to facilitate casting by splitting the intake chamber into two segments, to make it possible to cast even an intake chamber having a complicated shape, to reinforce the intake chamber by clamping a reinforcing plate between the flange surfaces of the divided intake chambers, and to allow intake air to play the functions of dispersing and mixing an EGR gas and a blow-by gas by utilizing a communication hole formed in this reinforcing plate.
  • DE-A-44 03 219 discloses an intake chamber with a similar construction as mentioned in the introductory part of claim 1. While there is a supporting plate between first and second chamber parts, the rigidity is not yet so perfect as it could be and especially the structure and the openings in the reinforcing plate do not allow the intake air to play the functions as mentioned above which would be preferred.
  • An intake chamber for accomplishing the objects described above is an intake chamber interposed between intake conduits each connected to each cylinder of a muliple-cylinder engine and an intake pipe, wherein the intake chamber comprises a first chamber having an intake conduit formed integrally therewith and a second chamber for connecting the intake pipe, flange faces are formed at openings of the first and second chambers, respectively, so that they can be joined to each other, and a reinforcing plate is clamped between both flange faces and has a communication hole for allowing communication between the inside space of the first chamber and that of the second chamber.
  • the reinforcing plate includes a frame portion which comes into contact with the flange faces, and longitudinal ribs and transverse ribs disposed in a grid form in such a manner as to connect the inside of the frame, and windows defined by the frame, the longitudinal ribs and the transferse ribs are used as communication hole for allowing communication between the first and second chambers.
  • the reinforcing plate is constituted in such a manner as to reinforce the first and second chambers, and to have the function of dispersing the gas passing from the second chamber to the first chamber and agitating the gas.
  • an intake chamber 1 is dividedly cast into a first chamber 2 and a second chamber 3, and flanges 4 and 5 are formed at the end openings of these chambers 2 and 3 in such a manner as to clamp a reinforcing plate 6 between them.
  • intake conduits 7 As many intake conduits 7 as the number of cylinders of the engine are dispersedly formed in the first chamber 2.
  • An intake pipe 8 is connected to one of the ends of the second chamber 3, and intake air is supplied to this intake pipe 8 through a filter and another intake pipe, and is supplied to an intake port of an engine, not shown, from the intake conduits.
  • the reinforcing plate 6 is constituted in such a manner as to partition the first inside space 2a of the first chamber 2 and the inside space 3a of the second chamber 3, to mix intake air supplied from the intake pipe 8, to disperse intake air so as to uniformly supply it to each intake conduit 7 and to reinforce the intake chamber 1 comprising the first chamber 2 and the second chamber 3 as a whole.
  • the reinforcing plate 6 in this embodiment has a rectangular pan shape as a whole, and one of the surfaces protrudes only slightly, as shown in Figs. 3 to 5.
  • An ordinary rolled steel sheet or stainless steel sheet is used for this reinforcing plate 6.
  • the reinforcing plate 6 includes a frame 6a that forms an outer shape, a seal portion and a basic portion for reinforcement, a longitudinal reinforcing rib 6c and a transverse reinforcing rib 6b. These members define windows 6d between them and form a grid shape as a whole. Further, bolt holes 6e are bored in the frame 6a.
  • the first chamber 2 and the second chamber 3 are assembled to that the protruding portion faces the inside space 2a of the first chamber 2 as shown in Fig. 6.
  • the frame 6a of the reinforcing plate 6 and the other reinforcing ribs 6b and 6c are preferably intergrally constituted by stamping a sheet metal.
  • the inventors of the present invention have prepared two round windows, three elongated rectangular windows for each of the right and left sides, two rectangular windows, two elliptic windows, and so forth, and have measured vibration and noise. Further, the present inventors examined the reinforcing effect, intake performance, the mixing and distribution effect of the EGR gas and the blow-by gas, the production cost, etc, and have concluded that the structure of this embodiment provides the best result.
  • Fig. 7 is a graph when a four-cylinder Diesel engine having a displacement of 1,700 cc is operated at a constant rotating speed in a medium speed range.
  • the abscissa represents a load and the ordinate does an EGR variations for each cylinder at this time.
  • a dash line represents the EGR variations in each cylinder when the intake chamber of the embodiment described above is used under the condition that the EGR variation of each cylinder of an intake chamber without the reinforcing plate according to the prior art is 100%.
  • the Diesel engine equipped with the intake chamber according to the present invention mixes intake air with the EGR gas and disperses the mixed gas while preventing the vibration. Therefore, an EGR ratio having a uniform and small variations for the four cylinders can be obtained particularly in the load range in which EGR is effected. Accordingly, this embodiment can exploit more efficiently the EGR effect than in the conventional engines, and can purify the exhaust gas.
  • the intake chamber according to the present invention can provide the following effects.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Claims (2)

  1. Einlaßkammer (1), angeordnet zwischen Einlaßkanälen, von denen jeder mit einem Zylinder eines mehrzylindrigen Motors verbunden ist, und einem Einlaßrohr, wobei die Einlaßkammer (1) eine erste Kammer (2) mit einem einstückig mit dieser ausgebildeten Einlaßkanal (7) und eine zweite Kammer (3) zum Verbinden mit dem Einlaßrohr aufweist, Flanschseiten (4 und 5) an Öffnungen der ersten bzw. zweiten Kammer (2 und 3) so ausgebildet sind, daß sie miteinander verbunden werden können, eine Verstärkungsplatte (6) zwischen den Flanschseiten (4 und 5) eingeklemmt ist und eine Verbindungsöffnung (6d), welche eine Verbindung zwischen dem Innenraum (2a) der ersten Kammer (2) und demjenigen (3a) der zweiten Kammer (3) zuläßt, in der Verstärkungsplatte (6) ausgebildet ist, dadurch gekennzeichnet, daß die Verstärkungsplatte (6) einen Rahmenabschnitt (6a), welcher mit den Flanschseiten (4 und 5) in Kontakt ist, Längsrippen (6c) und Querrippen (6b), welche in einer Gitterform in solch einer Art und Weise verteilt sind, daß sie die inneren Bereiche des Rahmens (6a) miteinander verbinden, und Fenster (6d), welche durch den Rahmen (6a), die Längsrippen (6c) und die Querrippen (6b) gebildet werden und als die Verbindungsöffnung (6d) verwendet werden, um eine Verbindung zwischen dem Innenraum (2a) der ersten Kammer (2) und demjenigen (3a) der zweiten Kammer (3) zuzulassen, aufweist.
  2. Einlaßkammer nach Patentanspruch 1, bei der die Verstärkungsplatte (6) die erste Kammer (2) und die zweite Kammer (3) verstärkt und die Funktion hat, ein Gas, welches von dem Innenraum (3a) der zweiten Kammer (3) in den Innenraum (2a) der ersten Kammer (2) hindurchtritt, zu verteilen und zu bewegen.
EP19960114588 1995-09-21 1996-09-12 Einlasskammer Expired - Lifetime EP0764781B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP24341595 1995-09-21
JP243415/95 1995-09-21
JP24341595A JP3680371B2 (ja) 1995-09-21 1995-09-21 吸気チヤンバー

Publications (3)

Publication Number Publication Date
EP0764781A2 EP0764781A2 (de) 1997-03-26
EP0764781A3 EP0764781A3 (de) 1997-12-03
EP0764781B1 true EP0764781B1 (de) 1999-12-29

Family

ID=17103532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960114588 Expired - Lifetime EP0764781B1 (de) 1995-09-21 1996-09-12 Einlasskammer

Country Status (3)

Country Link
EP (1) EP0764781B1 (de)
JP (1) JP3680371B2 (de)
DE (1) DE69605878T2 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2783567B1 (fr) * 1998-09-23 2000-10-27 Renault Collecteur d'admission pour moteur a combustion interne
DE102004009312B3 (de) * 2004-02-26 2005-04-28 Hatz Motoren Verfahren zur Herstellung eines einteiligen Zylinderkopfs für Dieselmotoren durch Druckgießen und Druckgussform zur Verwendung in dem Verfahren
FR2868132B1 (fr) * 2004-03-26 2009-02-27 Mann & Hummel Gmbh Installation d'admission de moteur a combustion interne
JP4523455B2 (ja) * 2005-03-01 2010-08-11 本田技研工業株式会社 吸気チャンバ
JP4872926B2 (ja) * 2008-01-15 2012-02-08 トヨタ自動車株式会社 多気筒内燃機関の吸気系構造
ITRE20110066A1 (it) * 2011-09-08 2013-03-09 Lombardini Srl Collettore di aspirazione dell'aria comburente per un motore a combustione interna dotato di egr
DE102015219629A1 (de) * 2015-10-09 2017-04-13 Röchling Automotive SE & Co. KG Fahrzeug-Ansaugtrakt

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2214373A1 (de) * 1972-03-24 1973-10-04 Daimler Benz Ag Verteiler fuer das ansaugsystem einer mehrzylindrigen kolbenbrennkraftmaschine
DE2702160C2 (de) * 1977-01-20 1982-09-23 Volkswagenwerk Ag, 3180 Wolfsburg Ansaugsystem
JPH07122419B2 (ja) * 1986-09-10 1995-12-25 マツダ株式会社 エンジンの吸気装置
DE4403219A1 (de) * 1994-02-03 1995-08-10 Daimler Benz Ag Als Baueinheit vorfertigbares Saugmodul für eine Mehrzylnder-Brennkraftmaschine

Also Published As

Publication number Publication date
EP0764781A3 (de) 1997-12-03
EP0764781A2 (de) 1997-03-26
DE69605878T2 (de) 2000-06-15
JP3680371B2 (ja) 2005-08-10
JPH0988744A (ja) 1997-03-31
DE69605878D1 (de) 2000-02-03

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