CN105026743A - Internal combustion engine - Google Patents
Internal combustion engine Download PDFInfo
- Publication number
- CN105026743A CN105026743A CN201480011151.5A CN201480011151A CN105026743A CN 105026743 A CN105026743 A CN 105026743A CN 201480011151 A CN201480011151 A CN 201480011151A CN 105026743 A CN105026743 A CN 105026743A
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- section
- combustion engine
- cross
- regulator
- wall elements
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
- F04D29/464—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades
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- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
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- 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/12—Control of the pumps
- F02B37/22—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits
- F02B37/225—Control of the pumps by varying cross-section of exhaust passages or air passages, e.g. by throttling turbine inlets or outlets or by varying effective number of guide conduits air passages
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- 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
- F02M26/02—EGR systems specially adapted for supercharged engines
- F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
- F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream of the compressor
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- 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
- F02M26/34—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with compressors, turbines or the like in the recirculation passage
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- 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
- F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/024—Units comprising pumps and their driving means the driving means being assisted by a power recovery turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
- F04D27/0207—Surge control by bleeding, bypassing or recycling fluids
- F04D27/0238—Details or means for fluid reinjection
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/51—Inlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Supercharger (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
Abstract
The invention relates to an internal combustion engine with a combustion engine, an exhaust gas line, a fresh gas line, a turbocharger with a turbine integrated into the exhaust gas line, a compressor integrated into the fresh gas line, and a trim plate (12), by means of which the cross section of the compressor inflow can be adjusted. The internal combustion engine is characterized by a low-pressure exhaust gas recirculation system, by means of which exhaust gas downstream of the turbine is removed from the exhaust gas line and can be introduced into the fresh gas line upstream of the compressor, wherein an opening of the low-pressure exhaust gas recirculation system is arranged in the region of the trim plate (12).
Description
Technical field
The present invention relates to a kind of internal-combustion engine, it has combustion engine (Verbrennungsmotor), exhaust gases, live gas circuit (Frischgasstrang), with the turbine be integrated in exhaust gases be integrated into the exhaust-gas turbocharger of the compressor in live gas circuit and have regulator (Trimsteller), can change compressor to become a mandarin the cross section of (Verdichteranstr mung) by regulator.
Background technique
The live gas carried via the live gas circuit of combustion engine is compressed within the compressor.At this, the rotating speed that boost in pressure depends on the active wheel (Laufrad) of compressor and the mass flow (Massenstrom) of live gas guided via active wheel.Because the inflow entering seamed edge of the inflow velocity runner vane reduced relative to peripheral velocity is on the pressure side realizing with increasing on the direction of the pump limit (Pumpgrenze) of compressor characteristics field (Verdichterkennfeld), that is, the continuing to increase of inflow.From the limiting value relevant to operating point of this generation, pump limit, be flowing in and enter seamed edge place and to peel off and flowing within the compressor becomes unstable.
In the scope of pump limit, in the region of the case outlines of compressor, form the recirculating zone (R ü ckstr mgebiet) of the fluid of few pulse.This so-called reflux bulb (R ü ckstr mblase) causes the decline of compressor efficiency due to vortex and losses by mixture on the direction of pump limit.But in the region of the wheel-hub contour (Nabenkontur) of active wheel, multipulse and lose less core flowing (Kernstr mung) and also stretch by compressor close to pump limit, mass flow rate (Massendurchsatz) and pressure foundation (Druckaufbau) are determined in the flowing of this core.
Regulator moves to the direction of low quality stream for making the pump limit of compressor characteristics field when high compression ratio.Meanwhile, regulator can cause the lifting of compressor efficiency in the scope of pump limit.To this, regulator comprises a device, can be changed flow into cross section (active wheel of compressor is flowed into) wherein by it.By the nozzle effect (D ü senwirkung) of regulator so realized, intervene (Regeleingriff) and increase (flowing into cross section to reduce) along with regulating and compressor can be become a mandarin on the flow cross section of the close wheel hub gathering compressor operating wheel more strongly.Thus, less fluid flow to few pulse of reflux bulb and in lossy region and make near wheel hub region in core flowing accelerate and additionally stablize thus.The suction side that the acceleration of the flowing in the region of the close wheel hub of compressor additionally causes compressor to become a mandarin moves, and this can contribute to the further stabilization flowed.The stabilization of core flowing causes the pump limit of compressor characteristics field desirably to move to the less mass flow of waste gas.Under (regulator is opened completely) is intervened in less desirable adjustment, before compressor, open the whole cross section of live gas circuit as far as possible, thus do not produce additional friction or restriction loss as far as possible in compressor becomes a mandarin.The width of compressor efficiency and compressor characteristics field therefore on the direction of blocking boundary (Stopfgrenze) indistinctively by regulator negative effect.
By can improve dynamic response characteristic and the partial load run (Teillastbetrieb) of the internal-combustion engine of supercharging by means of the movement of regulator pump limit and the lifting of simultaneously compressor efficiency.By the system effectiveness improved, the exhaust back pressure (Abgasgegendruck) in partial load scope can reduce, and the consumption of internal-combustion engine reduces thus.By the movement of efficiengy-increasing and pump limit, maximum Engine torque can reach when engine speed is lower and therefore improve the transient response characteristic of internal-combustion engine.
Such internal-combustion engine is known by file DE 10 2,010 026 176 A1.The regulator of there comprises cone (Konus), and it is made up of multiple thin slice (Lamelle) in a form of implementation.Thin slice is arranged in two layers, and wherein, the thin slice of every layer is spaced apart and this is two-layer rotary shifted each other, makes the spacing of the thin slice of one deck covering between the thin slice of another layer corresponding.By means of can on y direction movement, outside gusset the end of the discharge cross section (Austrittsquerschnitt) of the structure cone of thin slice can be made to move radially around the ring of thin slice.Thus, size that is that discharge cross section and that therefore flow into cross section (active wheel of compressor is flowed into) wherein changes.
In current internal-combustion engine, use low pressure-EGR (ND-AGR) to reach the emission limit value of legal provisions more and more.The waste gas taken out in the turbine downstream of exhaust-gas turbocharger to be imported into and by compressor suction together with live gas via conveying at this before the compressor of exhaust-gas turbocharger.At this, the importing of the waste gas of recirculation should realize as close as possible before compressor, was formed to avoid the less desirable condensation product in live gas or kept less.In order to regulate ND-AGR to lead, mostly modulating valve is integrated in the ND-AGR incoming line before suction port of compressor.
Not only the intake line of ND-AGR but also regulator should before near-earth be arranged in the active wheel of compressor as far as possible by function restriction, the structure space situation that this constitutes competition.
Summary of the invention
From the prior art, the object of the invention is a kind of favourable possibility for being integrated into by ND-AGR in such internal-combustion engine is described.
This object is realized by a kind of internal-combustion engine according to independent claims 1.Its favourable design proposal is the content of dependent claims and is drawn by ensuing explanation of the present invention.
With (at least one) combustion engine, (at least one) exhaust gases, (at least one) live gas circuit, have (at least one) be integrated into turbine in exhaust gases and (at least one) be integrated into compressor in live gas circuit especially radial compressor (at least one) exhaust gas turbocharger and according to the present invention, there is (at least one) low pressure exhaust gas recirculation (ND-AGR) with such internal-combustion engine of (at least one) regulator (cross section that compressor becomes a mandarin can be changed by it), by it waste gas being taken out in turbine downstream and can be swum on the compressor from exhaust gases imports in live gas circuit, wherein, ND-AGR (at least one) passes into mouth (M ü ndung) and is arranged in the region of regulator, that is in the section identical with the element of the cross section that the change compressor of regulator or regulator becomes a mandarin of live gas circuit.
By the mouth that passes into of ND-AGR is integrated in regulator and can be realized, not only the mouth that passes into of regulator but also ND-AGR is arranged near the approaching side of compressor operating wheel as far as possible.Solve structure space competition (Bauraumkonkurrenz) of these two parts thus.
Also additional advantage can be realized according to design of the present invention, as this is next pointed by internal-combustion engine.Especially advantageously can be arranged to, the design passing into the element of the cross section that the integrated of mouth and regulator or change compressor become a mandarin is selected such that the amount that also can control or regulate the waste gas that be imported in live gas circuit by means of regulator.Movable, change the element that compressor becomes a mandarin and correspondingly preferably can arrange and be configured so that its control valve being used as ND-AGR or modulating valve.This design proposal can especially advantageously realize, because the usual operation corresponding near pump limit to compressor in the operation area of ND-AGR that can reasonably use of combustion engine is associated.Especially the raising that ND-AGR leads can be associated with the movement of operating point on the direction of pump limit of compressor in compressor characteristics field, thus preferably can be arranged to, regulator increase when cross section that compressor becomes a mandarin reduces for waste gas by cross section (Durchlassquerschnitt).Correspondingly, the amount of the waste gas led back to via ND-AGR can flow in proportion to cross section be reduced by regulator to improve.
The reduction flowing into cross section for compressor operation no longer must and therefore also by the running state of combustion engine avoided, in order to avoid restriction loss, usually also should no longer need the EGR via ND-AGR.Therefore preferably can be arranged to, can be completely closed by means of regulator by cross section.
Regulator can have and is arranged in tubular housing (section of live gas circuit), funnel shaped wall system (Wandsystem) in a preferred design proposal, wherein, the discharge cross section of wall system by wall system more or less realize open and can change, and wherein, for waste gas by cross-sectional configuration between wall system and housing.Particularly preferably, the passing into mouth and can be arranged in the region of wall system at this of ND-AGR.Correspondingly, wall system can be used as the valve body of the AGR valve for ND-AGR, and wherein, wall system uses the section of housing as valve seat opening completely, when that is the inflow cross section of compressor operating wheel is maximum as far as possible.This is by means of regulator, structure simply and therefore realize the adjustment of the waste gas of recirculation cost advantages.Even if but regulator can bear the function of AGR valve, independent AGR valve also can be provided with.When should realize ND-AGR independent of regulator or independent of its adjustment on the impact of AGR recirculation rate (AGR-R ü ckf ü hrrate) time, this especially can be favourable.
In preferred design proposal, wall system can have multiple first wall element (it arranges in the circumferential spaced apartly circlewise) and multiple second wall elements (it arranges in the circumferential spaced apartly circlewise), wherein, the second wall elements hides the spacing between first wall element.In addition, controlling device that regulator can have (such as electrically, pneumatically or hydraulically handling), the end that the structure by means of its first and/or second wall elements discharges cross section can be moved diametrically.In like fashion, structure can provide adjustable, funnel shaped wall system at simple mode, it does not use highly resilient material, such as elastomer (Elastomer) passable yet.Therefore wall elements advantageously can by material hard to a great extent and especially construct by (multiple) metal (such as steel).
Controlling device can have location recognition, and it can by adjustment electronic equipment (such as engine controller) place of the corresponding position feedback of wall system to internal-combustion engine, regulator to be adjusted to pointedly the operating point place of internal-combustion engine.
In order to accept the Angulation changes produced by the change of the discharge cross section of wall elements, preferably can be arranged in addition, wall elements can be rotated to support on the end entering cross section of structure wall system.
Particularly preferably can be arranged at this, at least some seesaw type ground (wipenartig) in wall elements supports, thus the end radially outward making the structure of these wall elements enter cross section when the end radial finger that the structure of these wall elements discharges cross section moves inward moves, this is associated with the elasticity pretension of (at least one) spring element.Wall system spring can be utilized thus in a straightforward manner to be loaded in its position of opening and to realize rotatable supporting.
Wall elements also can (at least in part) structure wall system the end entering cross section tensioning regularly, wherein, angle change accepted by the resiliently deformable of wall elements.Because be out of shape smaller at this, this also can realize in the wall elements be such as made up of (multiple) metal.The additional spring element for being loaded into by wall system in its position of opening can be fallen thus if desired.
Preferably can be arranged to, wall elements has the cross section of U-shaped, and wherein, the end on the leg of the limit freely (Schenkel) of each first wall element lays respectively at (and vice versa) on the second wall elements.Resistance can be kept less by the relative movement thus for the slip between first wall element and the second wall elements.In addition can open by the maximum of limiting wall system thus.
The simple design proposal of preferred structure of controlling device can comprise the regulating ring (Verstellring) with one or more steering channel, wherein, the first and/or second wall elements is directed into and makes the rotation of regulating ring cause the structure of the first and/or second wall elements to discharge moving radially of the end of cross section in steering channel.
According to design proposal the passing into mouth and relative to known regulator, there is relevant advantage independent of ND-AGR in the region of regulator of the regulator of claim 7 to 11.Therefore these design proposals are the inventions independent of this.
Accompanying drawing explanation
Following basis in the accompanying drawings shown in embodiment elaborate the present invention.Wherein:
Fig. 1 discharges the regulator opened completely of cross section and the compressor according to internal-combustion engine of the present invention to be illustrated schematically in the first form of implementation to show;
Fig. 2 shows along the section plane II-II in Fig. 1 through the cross section according to the regulator of Fig. 1;
Fig. 3 shows by the unit formed according to regulator and the compressor of Fig. 1, but the discharge cross section of regulator reduces;
Fig. 4 shows along the section plane IV-IV in Fig. 3 through the regulator cross section according to Fig. 3;
Fig. 5 shows and discharges the regulator opened completely of cross section and the compressor according to internal-combustion engine of the present invention in the second form of implementation;
Fig. 6 shows by the unit formed according to regulator and the compressor of Fig. 5, but the discharge cross section of regulator reduces;
Fig. 7 shows controlling device for the regulator according to internal-combustion engine of the present invention and adjustable wall system with the first perspective view in the 3rd form of implementation; And
Fig. 8 shows by the unit formed according to wall system and the controlling device of Fig. 7 with the second perspective view.
Embodiment
Fig. 1 and 3 shows the first form of implementation of radial compressor 10 and the regulator 12 for internal-combustion engine according to the present invention with schematic longitudinal section.
Regulator 12 comprises tubular housing 14, and it can be integrated in the live gas circuit of internal-combustion engine in radial compressor 1 upstream.At this, housing 14 is directly connected with radial compressor 10 at approaching side in downstream.In housing 14, be furnished with wall system 16, it comprises the wall elements 18 of two and half hull shapes or blade-shaped in the present example, and wall elements end at its upstream can be rotated to support on the inner side place of housing 14.In these ends, two wall elements 18 have roughly semicircular cross section.On the direction of the end in downstream, the length of the cross section of the part circular of wall elements 18 reduces continuously, and wherein, the length of the wall elements 18 shown in Fig. 1 to 4 middle and upper part reduces to reduce higher than the length of the wall elements 18 of bottom.When making wall elements 18 inwardly swing by means of unshowned controlling device, this makes the wall elements 18 on top can sink to (see Fig. 4) in the wall elements 18 of bottom, and the end radial direction (longitudinal axis 20 about regulator) in downstream moves inward freely thus.By this swing, the size of the discharge cross section of wall system 16 or regulator 12 is made to reduce (see Fig. 3) relative to the position of opening completely (as it is shown in FIG).The shape simultaneously realizing discharging cross section changes over ellipse from circular.To discharge in central section that the reduction of cross section causes the live gas flowing through regulator 12 to gather the active wheel 22 of radial compressor 10 and therefore to cause the reduction of the inflow cross section of radial compressor 10 compared with the position of opening completely of regulator 12.
The wall elements 18 of bottom is also used as the AGR valve of ND-AGR, and ND-AGR leads in its housing 14 in the region of the wall system 16 of regulator 12.When regulator 12 is opened completely, what the wall elements 18 of bottom hid ND-AGR completely passes into mouth 24, thus substantially EGR does not occur.Along with the discharge cross section of regulator 12 more and more reduces, the wall elements 18 of bottom opens annular slot (Ringspalt) that broaden, part circular, and waste gas can be flow to radial compressor 10 from ND-AGR by it.
Fig. 5 and 6 shows radial compressor 10 in the form of implementation relative to the form of implementation modification according to Fig. 1 to 4 and regulator 12.
Regulator 12 comprises housing 14, and it is immovably arranged in the accommodating part constructed by the housing 26 of radial compressor 10.In the housing 14 of regulator 12, be furnished with funnel shaped wall system 16, it is by the wall elements 28 of the cross section with part circular of multiple band shape, and 30 construct.Wall system 16 corresponding to such as its in figures 7 and 8 shown in wall system 16.Wall elements 28,30 to be arranged in the layer of two coaxial circles and to have U-shaped cross-section, that is its except band shape, also comprise two respectively from it approximately with the limit leg that right angle extends except the basic section of part circular in cross-section, wherein, outside the limit leg being in (first) wall elements 28 of inner first layer is radially directed towards, and in the limit leg being in (second) wall elements 30 of the outside second layer is radially directed towards.Each wall elements 28,30 in these two layers is arranged in addition spaced apartly, wherein, is provided with rotary shifted between the two layers, thus the wall elements 28,30 of each layer hides the gap of another layer corresponding.Produce roughly that close, funnel shaped wall system 16 thus.The wall elements 28,30 of these two layers contacts via the end seamed edge (Endkante) of the smaller area of limit leg, can realize wall elements 28 thus, and 30 in the slip of going up resistance relatively less each other.In addition, wall elements 28, the limit leg structure terminal backstop of 30, opening of its limiting wall system 16.
Also in the state opened completely funnel shaped wall system 16 more or less realize open, that is wall elements 28, the end in the downstream freely of 30 move radially according in the embodiment of Fig. 5 and 6 by means of shift(ing) ring 32 (its outside gusset around wall elements 28,30 and can move up in the side of its longitudinal axis by means of controlling device 34) realize.Wall elements 28, the end of the upstream of 30 is rotatable or swingingly support, thus the Angulation changes occurred due to moving radially of free end is not by means of wall elements 28, and the distortion of 30 balances.Supporting ring 36 is used as the supporting element of the supporting of rotatable or seesaw type, and supporting ring has and wall elements 28, and the seam shape opening of the corresponding quantity of quantity of 30, wall elements 28, the narrow end section of 30 extends through seam shape opening.By means of the spring shackle 38 be such as made up of elastomer, wall system 16 is loaded in its position of opening completely (see Fig. 5).Spring shackle 38 by each end section in first wall element 28 approximately semicircle surround.Due to wall elements 28,30 supportings of seesaw type in supporting ring 36, wall elements 28, moving radially in the sensing of the end freely of 30 causes moving radially and therefore causing flexible periphery to increase (Umfangsvergr erung) in conjunction with (increase) elasticity pretension of spring shackle 38 outside the sensing of end section.
Stretched in the housing 26 of radial compressor 10 and passed into passage 40, it is arranged for being connected to the ND-AGR place according to internal-combustion engine of the present invention.Pass into passage 40 to lead in the housing 14 of regulator 12 in the region of wall system 16.Therefore can diffusion in the ring cavity 42 of surrounding wall system 16 circlewise from the waste gas passed into passage 40 out.In the state opened completely of regulator 12, wall elements 28, the end freely of 30 abuts in seamed edge 44 place of the inlet passage of radial compressor 10.Waste gas is avoided to overflow to the inlet passage of radial compressor 10 from ring cavity 42 thus to a great extent.Along with the discharge cross section of regulator 12 more and more reduces, due to wall elements 28, the end freely of 30 is radially-inwardly moved, and opens the annular slot of the circle broadened, can be flow to radial compressor 10 by its waste gas from ring cavity 42.
Show the alternative design proposal of controlling device 34 in figures 7 and 8, as it can be applicable in the regulator 12 according to Fig. 5 and 6.Controlling device 34 comprises regulating ring 46, the steering channel 48 that its inclination with the quantity corresponding to the quantity of the second wall elements 30 stretches.Be supported with movably in each in steering channel 48 and guide bolt 50.Bolt 50 is guided to be connected with in the second wall elements 30 via fixed arm 52 respectively.Due to the tilted alignment of steering channel 48, the rotation of regulating ring 46 causes and guides bolt 50 and therefore the moving radially of the second wall elements 30.Second wall elements 30 drives first wall element 28 when radially moving.Otherwise, be responsible for making first wall element 28 follow the motion of the second wall elements 30 by means of the loading of spring shackle 38 when outward radial moves.
List of numerals
10 radial compressors
12 regulators
14 housings
16 wall systems
18 wall elements
20 longitudinal axis
22 active wheels
24 pass into mouth
26 housings
28 first wall elements
30 second wall elements
32 shift(ing) rings
34 controlling devices
36 supporting rings
38 spring shackles
40 pass into passage
42 ring cavities
44 seamed edges
46 regulating rings
48 steering channels
50 guide bolt
52 fixed arms.
Claims (10)
1. an internal-combustion engine, it has combustion engine, exhaust gases, live gas circuit, with the turbine be integrated in described exhaust gases and be integrated into the exhaust-gas turbocharger of the compressor in described live gas circuit and there is regulator (12), the cross section that compressor becomes a mandarin can be changed by described regulator, it is characterized in that low pressure exhaust gas recirculation, by described low pressure exhaust gas recirculation waste gas taken out in described turbine downstream from exhaust gases and can import in described live gas circuit at described upstream of compressor, wherein, the mouth that passes into of described low pressure exhaust gas recirculation is arranged in the region of described regulator (12).
2. internal-combustion engine according to claim 1, is characterized in that, also can regulate the amount of the waste gas imported in described live gas circuit by means of described regulator (12).
3. internal-combustion engine according to claim 2, is characterized in that, described regulator (12) increases when cross section that described compressor becomes a mandarin reduces and passes through cross section for described waste gas.
4. internal-combustion engine according to claim 3, is characterized in that, described can be completely closed by means of described regulator (12) by cross section.
5. according to internal-combustion engine in any one of the preceding claims wherein, it is characterized in that, described regulator (12) has and is arranged in tubular housing (14), funnel shaped wall system (16), wherein, the discharge cross section of described wall system (16) by described wall system (16) more or less realize open and can change, and wherein, for described waste gas by cross-sectional configuration between described wall system (16) and described housing (14).
6. internal-combustion engine according to claim 5, it is characterized in that, the mouth (24) that passes into of described low pressure exhaust gas recirculation is arranged in the region of described wall system (16) and/or described wall system (16) has multiple first wall element (28) of arranging circlewise in the circumferential spaced apartly and has multiple the second wall elements (30) arranged circlewise in the circumferential spaced apartly in outside, wherein, described second wall elements (30) hides the spacing between described first wall element (28) and described regulator (12) has controlling device (34), end by means of the described discharge cross section of structure of first wall element (28) and/or the second wall elements (30) described in described controlling device can be moved diametrically.
7. internal-combustion engine according to claim 6, is characterized in that, wall elements (28,30) can be bearing in the end entering cross section of the described wall system of structure (16) rotatably.
8. internal-combustion engine according to claim 7, it is characterized in that, described wall elements (28,30) at least some seesaw type ground in supports, thus at described wall elements (28,30) the end radial finger of structure described discharge cross section makes the end radially outward entering cross section described in the structure of described wall elements (28,30) move when moving inward, and this is associated with the elasticity pretension of spring element.
9. the internal-combustion engine according to any one of claim 6 to 8, is characterized in that, described wall elements (28,30) has the cross section of U-shaped.
10. the internal-combustion engine according to any one of claim 6 to 9, it is characterized in that, described controlling device (34) comprises the regulating ring (46) with one or more steering channel (48), wherein, being directed in one or more in described steering channel (48) of first and/or second wall elements (28,30) makes the rotation of described regulating ring (46) cause moving radially of the end of the described discharge cross section of structure of described first wall element (28) and/or the second wall elements (30) diametrically.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013003418.3 | 2013-02-28 | ||
| DE102013003418.3A DE102013003418A1 (en) | 2013-02-28 | 2013-02-28 | Internal combustion engine |
| PCT/EP2014/053708 WO2014131790A1 (en) | 2013-02-28 | 2014-02-26 | Internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105026743A true CN105026743A (en) | 2015-11-04 |
| CN105026743B CN105026743B (en) | 2018-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480011151.5A Active CN105026743B (en) | 2013-02-28 | 2014-02-26 | Internal combustion engine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2981699B1 (en) |
| KR (1) | KR101951074B1 (en) |
| CN (1) | CN105026743B (en) |
| DE (1) | DE102013003418A1 (en) |
| WO (1) | WO2014131790A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2014131790A1 (en) | 2014-09-04 |
| EP2981699B1 (en) | 2017-05-03 |
| CN105026743B (en) | 2018-04-03 |
| KR20150119950A (en) | 2015-10-26 |
| DE102013003418A1 (en) | 2014-08-28 |
| KR101951074B1 (en) | 2019-02-21 |
| EP2981699A1 (en) | 2016-02-10 |
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