CN1308575C - Exhaust gas recirculation device of internal combustion engine - Google Patents

Exhaust gas recirculation device of internal combustion engine Download PDF

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Publication number
CN1308575C
CN1308575C CNB2003101183529A CN200310118352A CN1308575C CN 1308575 C CN1308575 C CN 1308575C CN B2003101183529 A CNB2003101183529 A CN B2003101183529A CN 200310118352 A CN200310118352 A CN 200310118352A CN 1308575 C CN1308575 C CN 1308575C
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CN
China
Prior art keywords
egr
exhaust gas
catalyst
recirculation device
gas recirculation
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CNB2003101183529A
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Chinese (zh)
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CN1502802A (en
Inventor
替地理挥
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Nissan Motor Co Ltd
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Nissan Motor Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/12Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems characterised by means for attaching parts of an EGR system to each other or to engine parts
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M26/00Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/14Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/15Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus

Abstract

An exhaust manifold of an internal combustion engine is pivotally connected to a catalytic converter through a spheric coupler. An exhaust gas recirculation device for use with the engine comprises an EGR gas inlet port provided in a downstream portion of the catalytic converter and an EGR gas passage line extending from the EGR gas inlet port to an intake system of the engine. At least a part of the EGR gas passage line is constructed by a passage defined in the spheric coupler.

Description

The Exhaust gas recirculation device of internal-combustion engine
Technical field
The exhaust gas recirculation of relate generally to internal-combustion engine of the present invention (EGR) device, concrete again, then relate to such one type Exhaust gas recirculation device, its compact dimensions, simple in structure, thus be easy to be installed in the confined space of engine compartment of motor vehicle.
Background technique
As what known, Exhaust gas recirculation device (or system) all is designed to a part of waste gas circulation to the gas handling system of motor, to reduce the combustion temperature of the air/fuel mixture in the motor, reduces the discharging of NOx from motor thus.
One of this gas recirculation system is shown among Japanese utility model application (JiRkaihei) 1-78256 of unexamined, and the exhaust gas entrance that it is arranged to from the waste gas system in the downstream that is arranged on catalyst sucks waste gas.In such EGR device, the gas handling system of motor can suck the waste gas of cleaning therein, because this waste gas is removed hydrocarbon and PM (being particulate matter) by catalyst.Like this, be not only the EGR circulation pipeline of EGR device, and also have the suction port, suction valve, oil nozzle, throttle valve etc. of motor all to be protected the sedimental pollution that is not harmful to.
In internal-combustion engine with above-mentioned EGR device, there is one type, it adopts an articulated joint, to be used for that a catalyst is connected to a waste gas header swingably, its objective is the non-desired vibration that stops motor, pitching and/or rolling reaches on the catalyst.
But, in the internal-combustion engine of the above-mentioned type, adopt this articulated joint, make catalyst come to move with respect to waste gas header swingably, just might cause the distortion of long EGR pipe with it.Nature when distortion becomes obvious, just can not obtain unimpeded gas flow in the EGR pipe, thereby in the case, expectability does not have the ride quality of the satisfaction of EGR device.In addition, in such internal-combustion engine, do not consider the layout of the EGR circulation pipeline of EGR device.In fact, only be reason for convenience, once adopt long EGR pipe, it extends to the gas handling system of motor from exhaust gas entrance through the confined space that defines in engine compartment.As what known, this layout of EGR device causes the heaviness of EGR device and complicated structure, thereby makes the assembling work of EGR device in engine compartment become difficulty or trouble at least.
Summary of the invention
Therefore, purpose of the present invention is for providing an Exhaust gas recirculation device, and it does not have above-mentioned shortcoming.
According to first kind of form of the present invention, a kind of Exhaust gas recirculation device of using with internal-combustion engine is provided, it has a spherical joint, waste gas header and catalyst are pivotably connected by this joint, and this device comprises that one is arranged on the EGR gas access in the downstream part of catalyst; This device comprises that also one extends to the EGR gas communication pipeline of the gas handling system of motor from the EGR gas access, and wherein, at least a portion EGR gas communication pipeline constitutes by a path that defines in spherical joint.
According to second kind of form of the present invention, a kind of Exhaust gas recirculation device of using with the internal-combustion engine with waste gas header is provided, by the spherical joint catalyst that is pivotably connected, this device comprises on house steward: one is arranged on the EGR gas access in the flue gas leading in catalyst downstream; One path that defines in spherical joint is even the path of this spherical joint also keeps its open mode when spherical joint is taked tilted position; One the one EGR pipe, it extends to the intake section of the path of spherical joint from the EGR gas access; With one the 2nd EGR pipe, it extends to the gas handling system of motor from the exit portion of the path of spherical joint.
Description of reference numerals
Fig. 1 is the schematic representation of the engine compartment of motor vehicle, and in fact the Exhaust gas recirculation device of the first embodiment of the present invention wherein is housed;
Fig. 2 is waste gas header and the sectional view that is connected catalyst thereon, wherein is combined with first embodiment;
Fig. 3 is the sectional view similar to Fig. 2, but illustrates from the view of a different direction;
Fig. 4 A is the sectional view of the major component of catalytic converter housing;
Fig. 4 B is the end elevation of the outlet diffuser of catalyst;
Fig. 5 is the view sub-anatomy of spherical joint and relative section thereof, and they are used among first embodiment;
Fig. 6 A is the view of the direction of the arrow " C " along Fig. 5;
Fig. 6 B is the view of the direction of the arrow " D " along Fig. 5;
Fig. 7 A is the sectional view that spherical joint is in the state that assembles;
Fig. 7 B is the view similar to Fig. 7 A, but the rollover conditions of spherical joint is shown; And
Fig. 8 is the view similar to Fig. 1, but the gas recirculation system of the second embodiment of the present invention is shown.
Embodiment
Describe two first and second embodiments 100 and 200 just of the present invention in detail below with reference to accompanying drawing.
For easy to understand, the speech of various concerned directions as right, left, upper and lower, all use in the following description towards the right side etc.But, these speech are only understood with respect to the figure that corresponding part is shown.
Referring to Fig. 1, an Exhaust gas recirculation device 100 shown in it, it is the first embodiment of the present invention.
As shown in the figure, being contained in the engine compartment of motor vehicle is an internal-combustion engine 1, and it is horizontal mount type.One intake manifold 2 is connected to the front side of motor 1, and intake manifold 2 collector unit 3 then places the top of motor 1.
At the rear side of motor 1, connect a waste gas header 4, it has a flange 5 on the downstream part of the associating of its arm.On flange 5, connect a catalyst 7 by spherical joint 6.This catalyst 7 has an outlet (not having numbering), stretches out an outlet pipe from it.
Owing to adopted spherical joint 6, allowing has relative swing between catalyst and waste gas header 4.Like this, just can suitably be absorbed, thereby can check the big vibration of catalyst 7 by spherical joint in the vibration of the motor that will produce inevitably 1 in service of motor 1.In fact, if being connected and need not just making closely by this spherical joint 6 between waste gas header 4 and the catalyst, then the vibration of motor 1 will cause the bigger vibration of catalyst 7, strengthen the possibility of the bump of 7 pairs of vehicle bodies of catalyst.Big in the waste gas header size, thus from the outstanding situation of motor, just usually adopt this spherical joint 6.
Return the past referring to Fig. 1, in the downstream part of catalyst 7, form an EGR gas access 9.As what will describe in detail afterwards, EGR gas access 9 exposes to EGR gas passageway 10, this path on the cylindrical housings of catalyst 7 vertically along its extension.There is an outlet EGR gas passageway 10, and one the one EGR pipe 11 extends to an EGR path that is arranged on the spherical joint 6 from it.One the 2nd EGR pipe, the 12 EGR paths from spherical joint 6 extend to above-mentioned collector unit 3 through an EGR valve 13.
Describing the swing of passing through spherical joint 6 between waste gas header 4 and the catalyst 7 in detail referring to Fig. 2 and 3 below connects.
As shown in the figure, the flange 5 that is connected on the association part in downstream of waste gas header 4 is the less tubular portion 5a of diameter, closely places a Gask-O-Seal 14 via press fit around it.
As described in afterwards will be more clearly, Gask-O-Seal 14 forms the critical elements of spherical joints 6, and the right of opening of being a surperficial 14a who protrudes is arranged.
Catalyst 7 generally comprises a cylindrical housings 17, and is contained in catalyst supports 15, in the housing 17 and is pressed in maintenance pad 16, between cylindrical housings 17 and the catalyst supports 15 and is connected to conical entrance diffuser 18 and on the entry end of housing 17 and is connected to conical outlet diffuser 19 on the outlet end of housing 17.
The flange unit 20 that on conical entrance diffuser 18, connects an enlarging, it forms another important element of above-mentioned spherical joint 6, and the left part that the opening of being recessed surperficial 20a is arranged, the surperficial 14a of the protrusion of this surface and Gask-O-Seal 14 is coupled closely and slidably.Should be pointed out that now because that protrude and recessed surperficial 14a and the sliding contact between the 20a, can obtain the relative swing between the flange unit 20 of Gask-O-Seal 14 and enlarging.
The spherical part 20b of the flange unit 20 of enlarging has done two screw holes in its radially relative part, and two threaded screws 21 pass this hole, is connected on the flange 5 with the flange unit 20 of loose ground with enlarging.Just, for this connection, each threaded screw 21 is screwed in the threaded hole that forms in the flange 5 as shown in the figure.Around each threaded screw 21, a helical spring 22 is set, it is arranged to draw towards flange 5 the circumferential part 20b of the flange unit 20 of enlarging.Because the work of helical spring 22, the recessed surperficial 20a bias voltage of the flange unit 20 of enlarging also leans against on the surperficial 14a of protrusion of Gask-O-Seal 14, thereby reaches a sealing reliably betwixt.
Because two screws 21 are set, so the flange unit 20 of enlarging is swung with respect to Gask-O-Seal 14 around an imaginary axis'L ' (see figure 2), this axis connects two screws 21, radially crosses over the flange unit 20 of enlarging simultaneously again.Because this swing connects, the vertical vibration of the waste gas header 4 that is caused by the vibration of motor 1 and the vertical vibration of catalyst 7 all can reliably and effectively be absorbed inevitably.
That part of details of a part of the formation Exhaust gas recirculation device 100 of catalysis coverter 7 is described below with reference to accompanying drawing.
As what see from Fig. 4 A, cylindrical housings 17 is to make by the sheet metal of a crooked single-piece.That is to say that as what can from then on scheme to understand, sheet metal be pressurized or bend to a cross section that is roughly S shape, and a bigger circular upper and a less rectangular lower arranged.Then, vertical flange-shaped edge of the sheet metal of shaping is welded on the predetermined part " W ".Adopt these steps, just define a cylindrical exhaust gas chamber 17a, it has catalyst supports 15 (not shown in FIG.)s that are received within wherein, and the path that extends vertically of the above-mentioned EGR of formation gas passageway 10 is arranged.As shown in the figure, EGR gas passageway 10 is parallel to that cylindrical exhaust gas chamber 17a extends and separates with a part of 17b and the exhaust air chamber 17a of housing 17.
As what seen by Fig. 4 B, conical outlet diffuser 19 is made by suppressing a circular metal plate.Because this pressurization, a part of sheet metal radially expands outwardly, and produces a part of doing groove 23 of radially expanding, and it is as above-mentioned EGR gas access 9.
As what seen by Fig. 3, when conical outlet diffuser 19 suitably was connected on the cylindrical housings 17, the opening end of interior side direction EGR gas passageway 10 of doing the part 23 of groove exposed to the open air.Like this, when connection was suitable, exhaust air chamber 17a and EGR gas passageway 10 became by expansion 23 registry with one another of doing groove, established expansion as EGR gas access 9.
As what seen by Fig. 3, there is the opening end 10a in a downstream EGR gas passageway 10, and it radially is positioned at the outside of conical entrance diffuser 18.The one EGR pipe 11 opening end 10a from the downstream extend to spherical joint 6.
As what seen by Fig. 1, in the time of in being properly mounted on waste gas system, catalyst 7 tilts by this way, so that the road surface of standing thereon with respect to relevant motor vehicle in the position of its inlet is higher than its outlet.Because this inclination of catalyst 7, EGR gas passageway 10 also tilts, thereby prevents that water of condensation is detained in path 10.
That part of details of a part of the formation Exhaust gas recirculation device 100 of spherical joint 6 is described below with reference to Fig. 5,6A, 6B, 7A and 7B.
As what mentioned in front, spherical joint 6 generally comprises two-part, and they are the flange unit 20 of Gask-O-Seal 14 and enlarging as shown in Figure 6, and they are connected to each other by a so-called spherical bearing.
That is to say that Gask-O-Seal 14 is the surperficial 14a of protrusion, recessed surperficial 20a then is in the flange unit 20 of enlarging.These protrusions being coupled into each other with 20a with recessed surperficial 14a contacts closely.Otherwise if requirement is arranged, the surface of protrusion can be provided by the flange unit 20 of enlarging, and recessed surface can be provided by Gask-O-Seal 14.
As what seen by Fig. 5,6A and 6B, Gask-O-Seal 14 has been done two EGR paths 24 on radially relative part.Two EGR openings 25 have also been done in the flange unit 20 of enlarging on radially relative part.
As what seen by Fig. 2, these EGR paths 24 and opening 25 are coupled to each other on the protrusion that contacts with each other and recessed surperficial 14a and 20a.
See that as figure thus two EGR openings 25 expose to the following concave space 26 of the sealing of defining between a recessed inner member 27a and recessed external member 27b.As shown in the figure, external member 27b locates to be welded on the inner member 27a in its circumferential edge " W ", to constitute the flange unit 20 of enlarging.
As what can understand from Fig. 5,7A and 7B, the size and dimension of each EGR opening 25 of the flange unit 20 of enlarging is all made the whole zone of opening end of the EGR path 24 of the correspondence that can cover Gask-O-Seal 14, even maximum angular orientation is taked with respect to Gask-O-Seal 14 in the flange unit 20 of enlarging.In an illustrated embodiment, each opening end of EGR path 24 and each EGR opening 25 are all done ovalisation.
As what see from Fig. 2 and 7B, because two screw 21 (see figure 2)s are set, the flange unit 20 that allows enlarging is around the swing of axis of imaginaries " L " (see figure 2), thereby can take in Fig. 7 B the maximum angle position with coordinate " θ " representative.
As what see from Fig. 6 A and 6B, the opening end of the EGR path 24 of Gask-O-Seal 14 is positioned on the axis of imaginaries " L ", and the EGR opening 25 of the flange unit 20 of enlarging also is positioned on the axis of imaginaries " L ".Because this layout, can make the relative displacement of the opening end of the EGR path 24 EGR opening 25 corresponding be minimum with it, this can reduce the size of the opening end and the EGR opening 25 of EGR path 24.
Go back referring to Fig. 2 and 3, following four spaces 26 of the sealing of the flange unit 20 of enlarging are managed 11 (see figure 3)s by an inlet 28 that forms with two EGR paths 24 of Gask-O-Seal 14 (see figure 2)s and an EGR and are communicated with on the recessed external member 27b of the flange unit 20 of enlarging.
As can be seen from fig. 1, when Exhaust gas recirculation device 100 suitably was contained in the engine compartment, inlet 28 road surfaces of standing thereon with respect to relevant motor vehicle were positioned on the lowermost part of recessed external member 27b.
As can be seen from fig. 2, the flange 5 that is arranged on the downstream part of associating of waste gas header 4 has been done two paths 29, and they are connected with the path 24 of Gask-O-Seal 14 respectively.EGR path 29 is at first united, and is connected to then on the 2nd EGR mouth of pipe, to be used for linking to each other with the EGR valve (see figure 1).
Like this, as what see from Fig. 1,2 and 3, the following concave space 26 of EGR gas access 9, EGR gas passageway 10, EGR pipe 11, sealing, two EGR openings 25, two EGR paths 24, two EGR paths 29 and the 2nd EGR pipe 12 constitute one so-called " EGR gas communication pipeline ", and it delivers to collector unit 3 by EGR valve 13 with the waste gas of cleaning.
Below, by accompanying drawing, especially Fig. 1,2 and 3 describes the operation of Exhaust gas recirculation device 100.
As can be seen from fig. 1, when motor 1 operation, be imported in the catalyst 7 through waste gas header 4 and spherical joint 6 from the waste gas of motor 1.Like this, waste gas had been handled by catalyst 7 before being disposed in the atmosphere through outlet pipe 8 and is clean.
At this moment, as can be seen from fig. 3, a part is introduced into the EGR gas passageway 10 from the EGR gas access of being defined by conical outlet diffuser 19 9 through the waste gas of the cleaning of the catalyst supports 15 of catalyst 7.After, the waste gas of cleaning just is introduced into the following concave space 26 of sealing of the flange unit 20 of EGR pipe 11, enlarging, then, as as can be seen from fig. 2, enter the EGR path 24 of Gask-O-Seal 14 and enter the EGR path 29 of flange 5, after, as can be seen from fig. 1, enter the 2nd EGR pipe 12 and finally be introduced into collector unit 3 through EGR valve 13.Because above-mentioned EGR gas re-circulation can reduce the discharging of NOx from motor 1.
The advantage of the above-mentioned degree gas recycling device of present embodiment will be described now.
As what see from Fig. 1 and 2, the intermediate portion of EGR gas communication pipeline, just the part that is made of the EGR path 24 of the EGR opening 25 of the flange unit 20 of the following concave space 26 of the sealing of the flange unit 20 of enlarging, enlarging and Gask-O-Seal 14 is compact and provided by spherical joint 6 effectively.That is to say that as can be seen from fig. 1, the fluid between first and second EGR pipe 11 and 12 is communicated with and is kept, even spherical joint 6 is owing to catalyst 7 illustrates its situation of tumbling (seeing Fig. 7 B) with respect to the angled position of waste gas header 4.
Because the spherical joint 6 with said structure is provided, so the vertical vibration of the waste gas header 4 that is produced by the vertical vibration of motor 1 and the vertical vibration of catalyst 6 can both reliably and effectively be absorbed inevitably, keep the fluid between each EGR path 24 of following concave space 26 and Gask-O-Seal 14 of sealing of flange unit 20 of enlarging to be communicated with simultaneously again.As what can understand from Fig. 1 and 7B, the flange unit 20 of enlarging and the swing between the Gask-O-Seal 14 can be to first and second EGR pipe, 11 and 12 application of forces, thereby can contain the distortion of these pipes 11 and 12, and this distortion will cause the increasing of the gas-flow resistance in the EGR gas communication pipeline.
Spherical joint 6 is hinges, and it comprises that a Gask-O-Seal 14 and with surperficial 14a of protrusion has the flange unit 20 of the enlarging of recessed surperficial 20a, and this recessed surface is coupled with the surperficial 14a that protrudes nearly and slidably.Gask-O-Seal 14 has been done EGR path 24, and the EGR opening 25 with following concave space 26 couplings of sealing is then done in the flange unit 20 of enlarging.These EGR paths 24 and EGR opening 25 are coupled with the zone of recessed surperficial 20a intimate contact at the surperficial 14a that protrudes.These arrange that not only forming a swing reliably between waste gas header 4 and catalyst 7 connects, and connects but also form a reliable and constant fluid between first and second EGR pipe 11 and 12.
As what see from Fig. 6 A, 6B and 7B, the size and dimension of each EGR opening 25 of the flange unit 20 of enlarging will so be made, even so that in the flange unit 20 of enlarging during, also can cover the whole zone of opening end of EGR path 24 of the correspondence of Gask-O-Seal 14 with respect to the angle of 14 one-tenth big of Gask-O-Seals.Like this, even keep relative wide-angle between the flange unit 205 of enlarging and the Gask-O-Seal 14, also can be unimpeded and realize EGR gas flow in the EGR gas communication pipeline reliably.
Owing to screw 21 (see figure 2)s on the flange 5 that provides two flange unit 20 loose grounds to be connected to waste gas header 4, so the flange unit 20 of enlarging is swung with respect to Gask-O-Seal 14 around axis of imaginaries " L " with enlarging.Therefore, can make relative displacement between the corresponding EGR opening 25 of opening end and the flange unit 20 of its enlarging of EGR path 24 of Gask-O-Seal 14 for minimum, this can reduce the size of the opening end and the EGR opening 25 of EGR path.
As can be seen from fig. 2, because two EGR openings 25 of two the EGR paths 24 of Gask-O-Seal 14 and the flange unit 20 of enlarging are to be provided with on two of spherical joint 6 radially relative positions, so in the pipeline of EGR gas passageway, can not only obtain the structure of spherical joint 6 balance on mechanics, and it is mobile to obtain the balance of EGR gas on fluid mechanics.
As can be seen from fig. 3, the welding portion " W " of the flange unit 20 of enlarging leaves the protrusion that contacts with each other and the recessed surperficial 14a and the 20a of spherical joint 6.Like this, the heat that produces during welding is basically to these surperficial 14a and not influence of 20a, thereby the sealability that surperficial 14a and 20a had remains unchanged.In addition, because welding portion " W " is to the perimeter exposure, so carry out easily in the welding of this part " W ".
When assembling Exhaust gas recirculation device 100, the opening 28 of the recessed external member 27b of the flange unit 20 of enlarging is positioned on the lowermost part of member 27b.Therefore, the water of condensation that produces in the following concave space 26 of the sealing of the flange unit 20 of enlarging can be swimmingly from this discharge inevitably, thereby the flange unit 20 that can suppress enlarging gets rusty.
As can be seen from fig. 3, neat, compact and the upstream portion of EGR gas communication pipeline is provided integratedly by the housing 17 of catalyst 7, just by EGR gas access 9 and EGR gas passageway 10 constitute that part of.Like this, as can be seen from fig. 1, Exhaust gas recirculation device 100 can simplified structure, reduces size.As what known, even the Exhaust gas recirculation device 100 with these characteristics also can easily be installed in the engine compartment when the limited space of engine compartment.
(seeing Fig. 4 B) made by the part of pressurization conical outlet diffuser 19 in EGR gas access 9, and EGR gas passageway 10 is then by crooked or the single sheet metal that pressurizes, and makes it to be roughly the cross section of S shape and makes (seeing Fig. 4 A).Like this, the upstream portion of EGR gas communication pipeline can provide with lower cost.
Because the position of EGR gas access 9 and structure are made the waste gas of the cleaning that can accept to have passed through catalyst 7, so the inside of EGR gas communication pipeline is protected, avoid collecting the non-required sediments of wanting.
As can be seen from fig. 1, in the time of on installing to motor vehicle, catalyst 7 is taked the posture that tilts, and the position of its inlet is higher than the position of its outlet with respect to the road surface.Because this inclination of catalyst 7, EGR gas passageway 10 also tilts, thereby prevents that water of condensation is detained in path 10.Like this, can prevent that path 10 from getting rusty.
Referring to Fig. 8, this place illustrates an Exhaust gas recirculation device 200, and it is the second embodiment of the present invention.
In this embodiment 200, there is not device corresponding to the EGR gas passageway 10 that provides integratedly by the catalyst 7 that in above-mentioned first embodiment 100, uses.That is to say, in this second embodiment 200, in the outlet pipe 8 in the downstream of catalyst 7, an EGR gas access 31 is set, and has EGR pipe 32 to extend to the inlet 28 that among the recessed external member 27b of the flange unit 20 of enlarging, forms from EGR gas access 32.In this embodiment 200,, also can keep two fluids between the EGR pipe 32 and 12 to connect reliably even when spherical joint 6 illustrates its rollover conditions (seeing Fig. 7 B) owing to catalyst 7 with respect to waste gas header 4.
The full content of Japanese patent application 2002-340646 (registration on November 25th, 2002) is included in this, with as a reference.
Though described the present invention with reference to embodiments of the invention in the above, the present invention is not limited to these embodiments as described above.Can carry out these embodiments' various improvement and change by the person skilled in the art according to the above description.

Claims (16)

1. Exhaust gas recirculation device (100,200) of using with internal-combustion engine (1), it has a spherical joint, and waste gas header (4) is pivotably connected by this joint with catalyst (7), and this device comprises:
-be arranged on the EGR gas access (9,31) in the downstream part of catalyst (7); And
-extend to the EGR gas communication pipeline (10,11,24,25,26,12,32) of the gas handling system (3) of motor (1) from EGR gas access (9),
It is characterized by, at least a portion EGR gas communication pipeline is made of a path that defines in spherical joint (6) (24,25,26).
2. Exhaust gas recirculation device as claimed in claim 1, wherein, spherical joint comprises:
-have a surface (14a) of protruding and be connected to waste gas header (4) and catalyst (7) in one (4) on first member (14);
-having second member (20) on a recessed surface (20a) that can contact closely with the surface (14a) of the protrusion of first member (14), this second member (20) is connected on another (7) in waste gas header (4) and the catalyst (7);
-EGR the path (24) that in first member (14), defines; And
-the 2nd EGR path (25,26) that in second member (20), defines and expose to an EGR path (24) of first member (14) consistently.
3. Exhaust gas recirculation device as claimed in claim 2, wherein, one size and dimension in the opposed facing opening end of the first and second EGR paths (24,25,26) will be made, even when first and second members (14,20) present maximum relative angle betwixt, also can cover another the whole zone in the opposed facing opening end.
4. Exhaust gas recirculation device as claimed in claim 3, wherein, spherical joint further comprises a swaying direction controller (21,22), by it, allow second member (20) to swing around a given axis with respect to first member (14), and wherein, the end that faces one another of the first and second EGR paths (24,25,26) all is positioned on the given axis.
5. Exhaust gas recirculation device as claimed in claim 4, wherein, swaying direction controller (21,22) comprising:
Two screw holes that in the radially relative part of second member (20), form;
Two screws (21), they pass two screw holes respectively, second member (20) loosely is connected on the member (5) that is fixed on first member (14); And
Two helical springs (22), they are placed on two screws (21) respectively all around, with the recessed surface (20a) of bias voltage second member (20), lean against on the surface (14a) of protrusion of first member (14).
6. Exhaust gas recirculation device as claimed in claim 2, wherein, each first and second EGR path (24,25,26) comprises two paths that are provided with on the radially relative position of spherical joint.
7. Exhaust gas recirculation device as claimed in claim 2, wherein, second member (20) is the flange unit of enlarging, it comprises:
-recessed inner member (27a), it has the recessed surface (20a) that can contact with the surface (14a) of the protrusion of first member (14);
-recessed external member (27b), it is welded on the recessed inner member (27a) with its circumferential edge, its mode is for defining the following concave space (26) of a sealing betwixt, and the following concave space (26) of this sealing constitutes the 2nd EGR path (25,26) of second member (20).
8. Exhaust gas recirculation device as claimed in claim 7, wherein, recessed external member (27a) has been done inlet (28), and a pipe (11,32) that is connected to EGR gas access (9,31) is connected on this inlet (28).
9. Exhaust gas recirculation device as claimed in claim 8, wherein, when assembling Exhaust gas recirculation device (100,200) in the engine compartment at motor vehicle, with respect to the road surface at motor vehicle place, inlet (28) is positioned at the foot of recessed external member (27b).
10. Exhaust gas recirculation device as claimed in claim 1, it further comprises one on catalyst (7) and along the EGR gas passageway (10) that its sidewall forms, this EGR gas passageway (10) constitutes at least a portion of EGR gas communication pipeline.
11. Exhaust gas recirculation device as claim 10, wherein, extend along the axis of the housing (17) of catalyst (7) EGR gas passageway (10), this housing (17) has the catalyst supports (15) that is mounted in it, and wherein, EGR gas passageway (10) have an intake section that exposes to EGR gas access (9).
12. as the Exhaust gas recirculation device of claim 11, wherein, the housing (17) by catalyst (7) constitutes EGR gas passageway (10) integratedly.
13. Exhaust gas recirculation device as claim 12, wherein, the housing (17) of catalyst (7) is by pressurization one sheet metal, making it one is roughly the cross section of S shape and makes, there is a bigger circular upper and a less rectangular lower in this cross section, the given edge of the sheet metal of welding forming then is shaped and the sheet metal of welding constitutes EGR gas passageway (10) at the part place that less rectangular lower is arranged.
14. Exhaust gas recirculation device as claim 13, wherein, EGR gas access (9) is defined by the radially part of doing groove (23) of expansion of the outlet diffuser (19) of catalyst (7), and radially the groove of Kuo Zhang the part of doing groove (23) exposes to the intake section of EGR gas passageway (10).
15. Exhaust gas recirculation device as claimed in claim 1, wherein, when assembling Exhaust gas recirculation device (100,200) in the engine compartment at motor vehicle, catalyst (7) tilts by this way, with respect to the road surface at motor vehicle place, make the position of the inlet of catalyst (7) be higher than the exit position.
16. an exhaust gas circulating device (200) that uses with the internal-combustion engine with a waste gas header (4) (1), by a spherical joint (6) catalyst (7) that is pivotably connected, this device comprises on this house steward:
-be arranged on the EGR gas access (9) in the outlet pipe (8) in downstream of catalyst (7);
-the path (24,25,26) that in spherical joint (6), defines, even when spherical joint (6) is taked a heeling condition, the path of spherical joint also keeps its open mode;
-the one EGR manages (32), and it extends to the intake section of the path (24,25,26) of spherical joint (6) from EGR gas access (9); And
-the two EGR manages (12), and it extends to the gas handling system (3) of motor (1) from the exit portion of the path (24,25,26) of spherical joint (6).
CNB2003101183529A 2002-11-25 2003-11-25 Exhaust gas recirculation device of internal combustion engine Expired - Lifetime CN1308575C (en)

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4048931B2 (en) * 2002-11-25 2008-02-20 日産自動車株式会社 EGR device for engine
JP5791458B2 (en) * 2011-10-12 2015-10-07 本田技研工業株式会社 Exhaust gas recirculation device for internal combustion engine
DE102016121434B4 (en) * 2016-11-09 2022-10-27 Man Energy Solutions Se Exhaust aftertreatment system of an internal combustion engine
JP6521005B2 (en) * 2017-08-24 2019-05-29 マツダ株式会社 Automobile
JP6838542B2 (en) 2017-10-12 2021-03-03 トヨタ自動車株式会社 Catalyst device
JP2020197169A (en) * 2019-06-03 2020-12-10 株式会社豊田自動織機 Ammonia combustion system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5544482A (en) * 1994-03-18 1996-08-13 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas-purifying system for internal combustion engines
US5946906A (en) * 1996-11-20 1999-09-07 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas purification system of internal combustion engine
JP2002285916A (en) * 2001-03-27 2002-10-03 Mitsubishi Motors Corp Exhaust gas recirculation apparatus
CN2742167Y (en) * 2002-11-25 2005-11-23 日产自动车株式会社 Exhaust gas recirculation device of internal combustion engine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5374086A (en) * 1992-07-29 1994-12-20 Creative Industries Group, Inc. Ball joint seal for vehicle exhaust system
JPH08291772A (en) * 1995-04-20 1996-11-05 Mazda Motor Corp Egr gas taking-out structure for engine
JP3250458B2 (en) * 1996-05-31 2002-01-28 トヨタ自動車株式会社 Exhaust pipe connection structure of internal combustion engine
JP4434401B2 (en) * 2000-01-19 2010-03-17 本田技研工業株式会社 Exhaust gas purification device for internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5544482A (en) * 1994-03-18 1996-08-13 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas-purifying system for internal combustion engines
US5946906A (en) * 1996-11-20 1999-09-07 Honda Giken Kogyo Kabushiki Kaisha Exhaust gas purification system of internal combustion engine
JP2002285916A (en) * 2001-03-27 2002-10-03 Mitsubishi Motors Corp Exhaust gas recirculation apparatus
CN2742167Y (en) * 2002-11-25 2005-11-23 日产自动车株式会社 Exhaust gas recirculation device of internal combustion engine

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EP1422411A3 (en) 2006-08-09
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EP1422411A2 (en) 2004-05-26
DE60335442D1 (en) 2011-02-03
CN2742167Y (en) 2005-11-23
KR20040045365A (en) 2004-06-01
JP4048931B2 (en) 2008-02-20
CN1502802A (en) 2004-06-09
KR100589101B1 (en) 2006-06-14

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