CN102588051A - Waste gas post-processing system of twin-turbo supercharged engine - Google Patents
Waste gas post-processing system of twin-turbo supercharged engine Download PDFInfo
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- CN102588051A CN102588051A CN2012100503355A CN201210050335A CN102588051A CN 102588051 A CN102588051 A CN 102588051A CN 2012100503355 A CN2012100503355 A CN 2012100503355A CN 201210050335 A CN201210050335 A CN 201210050335A CN 102588051 A CN102588051 A CN 102588051A
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- branch pipe
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
The invention discloses a waste gas post-processing system of a twin-turbo supercharged engine, which belongs to the technical field of engines and is aiming at solving the problem that the three-way catalytic conversion efficiency is low in the prior art. The waste gas post-processing system of a twin-turbo supercharged engine comprises a first gas exhaust manifold and a second gas exhaust manifold, wherein a gas inlet of the first gas exhaust manifold is connected to a waste gas outlet of a first turbo supercharger; a gas inlet of the second gas exhaust manifold is connected to a waste gas outlet of a second turbo supercharger; the gas outlet of the first gas exhaust manifold and the gas outlet of the second gas exhaust manifold are connected to a three-way catalyst; a meeting chamber is arranged among the gas outlet of the first gas exhaust manifold and the gas outlet of the second gas exhaust manifold and the three-way catalyst; the gas outlets of the first gas exhaust manifold and the second gas exhaust manifold are connected to the meeting chamber after being converged; and the meeting chamber is connected to the catalyst. The waste gas post-processing system of a twin-turbo supercharged engine disclosed by the invention is used for processing the waste gas produced by an engine.
Description
Technical field
The present invention relates to technical field of engines, relate in particular to a kind of exhausted gas post-processing system of twin turbocharged engine.
Background technique
The air inlet system and exhaust system of motor adopt turbo charged mode to improve the power of motor usually at present, and turbosupercharging is that air is compressed in advance, in the cylinder of the motor that reinjects.Turbosupercharging is normally realized by turbosupercharger.Exhaust gas turbocharge is to lean on the remaining kinetic energy of engine exhaust to drive the turbine rotation, and advantage is to promote engine power through raising secondary speed, increase suction pressure, and shortcoming is that the turbo phenomenon is arranged; Be that motor waste gas kinetic energy when rotating speed is low is less; Can not drive the turbine high speed rotating to produce the effect that increases suction pressure, engine power at this time is equal to natural aspiration, after rotating speed improves; Turbosupercharging is worked, and power can promote suddenly.To the turbo phenomenon of exhaust gas turbocharge, can adopt two turbosupercharger of parallel connection to solve, in engine low rotation speed, less waste gas can drive the turbine high speed rotating to produce enough suction pressures, reduces the turbo effect.
Under the prerequisite that reduces the turbo effect, motor also should satisfy various minimizing dischargings and improve the regulation of fuel economy, therefore to very important through the exhaust after-treatment of turbosupercharger outlet.Petrol engine generally adopts three-element catalytic that waste gas is carried out purified treatment to reduce the discharging of automobile harmful gas at present.
Twin turbocharged engine exhaust after-treatment to parallel connection; What existing technology adopted is two cover exhausted gas post-processing systems; Promptly for each turbosupercharger one cover exhausted gas post-processing system is set, owing to receive the restriction of installing space, the distance that flows before the entering three-element catalytic carrier after waste gas is discharged from turbosupercharger is bigger; The pipeline more complicated; Cause the engine exhaust decrease temperature and pressure bigger, add engine exhaust and can not therefore finally cause the three-element catalytic transformation efficiency low equably through the three-element catalytic carrier in the exhausted gas post-processing system; Especially in the engine cold-start stage, the three-element catalytic transforming agent light-off time in the exhausted gas post-processing system is long, the three-element catalytic transformation efficiency is lower.
Summary of the invention
Embodiments of the invention provide a kind of exhausted gas post-processing system of twin turbocharged engine, with solving the low technical problem of three-element catalytic transformation efficiency in the existing technology.
For achieving the above object, embodiments of the invention adopt following technological scheme:
A kind of exhausted gas post-processing system of twin turbocharged engine; Comprise: first exhaust branch pipe and second exhaust branch pipe; The suction port of said first exhaust branch pipe connects the waste gas outlet of first turbosupercharger; The suction port of said second exhaust branch pipe connects the waste gas outlet of second turbosupercharger, and the air outlet of said first exhaust branch pipe is connected ternary catalyzing unit with the air outlet of said second exhaust branch pipe; Wherein, Between the air outlet of the air outlet of said first exhaust branch pipe and said second exhaust branch pipe and said ternary catalyzing unit, be provided with the chamber that crosses; Be connected to the said chamber that crosses after the air outlet of the air outlet of said first exhaust branch pipe and said second exhaust branch pipe is converged, the said chamber that crosses connects said ternary catalyzing unit.
Further, the cross section in the said chamber that crosses enlarges from concourse to the said ternary catalyzing unit of the air outlet of the air outlet of said first exhaust branch pipe and said second exhaust branch pipe gradually.
Secondly, the concourse of the air outlet of the air outlet of said first exhaust branch pipe and said second exhaust branch pipe is provided with dividing plate in the said chamber that crosses.
Once more, the said chamber that crosses is combined by stamping forming two splits, and the joint of said split is provided with flange.
Preferably, the said chamber that crosses is a double layer construction.
Further, be filled with thermal insulating material in the cavity between the said double-deck inner and outer wall.
Secondly, being provided with first between the waste gas outlet of the suction port of said first exhaust branch pipe and said first turbosupercharger flexibly connects and is provided with second between the waste gas outlet of suction port and said second turbosupercharger of portion and said second exhaust branch pipe and flexibly connects portion.
Once more, said first portion that flexibly connects adopts ring-shaped clip to be connected with the waste gas outlet and said second of said first turbosupercharger portion that flexibly connects with the waste gas outlet of said second turbosupercharger.
Further, said chamber and the said ternary catalyzing unit of crossing welds together.
Preferably, the said chamber that crosses, said first exhaust branch pipe and said second exhaust branch pipe are one-body molded.
The exhausted gas post-processing system of the twin turbocharged engine that the embodiment of the invention provides; Waste gas from said first turbosupercharger and said second turbosupercharger is got into directly cross after said first exhaust branch pipe and said second exhaust branch pipe and get into the said chamber that crosses; The said chamber that crosses connects said ternary catalyzing unit, is equal to through the said chamber that crosses two original cover exhausted gas post-processing systems are united two into one.Use a cover exhausted gas post-processing system, saved installing space, make line arrangement simpler; Shortened the exhaust distance; Help reducing the waste gas decrease temperature and pressure, make the reaction temperature that is higher than the three-element catalytic transforming agent through the EGT of ternary catalyzing unit, improve the three-element catalytic conversion ratio; Can guarantee also simultaneously that waste gas uniformly through the three-element catalytic carrier, further improves the three-element catalytic transformation efficiency.Especially in the engine cold-start stage, EGT is low, adopt a cover exhausted gas post-processing system that constitutes by the said chamber that crosses after, waste gas lower the temperature in flow process less, helps shortening three-element catalytic transforming agent light-off time, further improves catalytic conversion efficiency.
Description of drawings
Fig. 1 is the structural representation of motor with exhausted gas post-processing system of embodiment of the invention twin turbocharged engine;
Fig. 2 is the structural representation of the exhausted gas post-processing system of embodiment of the invention twin turbocharged engine;
Fig. 3 is the structural representation in the chamber that crosses shown in Figure 2;
Fig. 4 is the inner structural representation in chamber that crosses shown in Figure 2.
Reference character:
The 2-chamber that crosses, 21-first exhaust branch pipe, 22-second exhaust branch pipe, 3-first turbosupercharger; 31-second turbosupercharger, the 4-ternary catalyzing unit, 71-first flexibly connects portion, and 72-second flexibly connects portion; The 8-split, 9-flange, 11-dividing plate, 12-ring-shaped clip.
Embodiment
Be described in detail below in conjunction with the exhausted gas post-processing system of accompanying drawing embodiment of the invention twin turbocharged engine.
Should be clear and definite, described embodiment only is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills are not making all other embodiments that obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to shown in Figure 1; A specific embodiment for the exhausted gas post-processing system of twin turbocharged engine of the present invention; The exhausted gas post-processing system of twin turbocharged engine described in the present embodiment comprises: first exhaust branch pipe 21 and second exhaust branch pipe 22; The suction port of said first exhaust branch pipe 21 connects the waste gas outlet of first turbosupercharger 3; The suction port of said second exhaust branch pipe 22 connects the waste gas outlet of second turbosupercharger 31, and the air outlet of the air outlet of said first exhaust branch pipe 21 and said second exhaust branch pipe 22 is connected ternary catalyzing unit 4; Wherein, Between the air outlet of the air outlet of said first exhaust branch pipe 21 and said second exhaust branch pipe 22 and said ternary catalyzing unit 4, be provided with the chamber 2 that crosses; Be connected to the said chamber 2 that crosses after the air outlet of the air outlet of said first exhaust branch pipe 21 and said second exhaust branch pipe 22 is converged, the said chamber 2 that crosses connects said ternary catalyzing unit 4.
The exhausted gas post-processing system of the twin turbocharged engine that the embodiment of the invention provides; Waste gas from said first turbosupercharger and said second turbosupercharger is got into directly cross after said first exhaust branch pipe and said second exhaust branch pipe and get into the said chamber that crosses; The said chamber that crosses connects said ternary catalyzing unit, is equal to through the said chamber that crosses two original cover exhausted gas post-processing systems are united two into one.Use a cover exhausted gas post-processing system, saved installing space, make line arrangement simpler; Shortened the exhaust distance; Help reducing the waste gas decrease temperature and pressure, make the reaction temperature that is higher than the three-element catalytic transforming agent through the EGT of ternary catalyzing unit, improve the three-element catalytic conversion ratio; Can guarantee also simultaneously that waste gas uniformly through the three-element catalytic carrier, further improves the three-element catalytic transformation efficiency.Especially in the engine cold-start stage, EGT is low, adopt a cover exhausted gas post-processing system that constitutes by the said chamber that crosses after, waste gas lower the temperature in flow process less, helps shortening three-element catalytic transforming agent light-off time, further improves catalytic conversion efficiency.
Referring to shown in Figure 2, the cross section in the said chamber 2 that crosses enlarges from concourse to the said ternary catalyzing unit 4 of the air outlet of the air outlet of said first exhaust branch pipe 21 and said second exhaust branch pipe 22 gradually.The said cross section that crosses chamber 2 enlarges gradually; Reduced the pressure loss of waste gas in flow process; Be that waste gas reduces at the suction port in the chamber that crosses and the pressure ratio of air outlet relatively; Thereby waste gas is reduced at the flow velocity of the air outlet in the said chamber that crosses, like this time of in ternary catalyzing unit 4, stopping of waste gas longer relatively, help improving the three-element catalytic conversion ratio; Simultaneously because the exhaust gas pressure loss reduces, more approach during through ternary catalyzing unit cylindrically at waste gas, promptly waste gas is more even through ternary catalyzing unit, more helps improving the three-element catalytic conversion ratio.
Referring to Fig. 3 and shown in Figure 4, the concourse of the air outlet of the air outlet of said first exhaust branch pipe 21 and said second exhaust branch pipe 22 is provided with dividing plate 11 in the said chamber 2 that crosses.11 pairs of waste gas through said first exhaust branch pipe 21 and said second exhaust branch pipe 22 of said dividing plate carry out water conservancy diversion; Make two strands of waste gas successfully introduce the said chamber 2 and mobile that crosses along the pipeline in the said chamber 2 that crosses; Through the three-element catalytic carrier, help improving the three-element catalytic transformation efficiency equably.
Referring to shown in Figure 3, the said chamber 2 that crosses is combined by stamping forming two splits 8 once more, and the joint of said split 8 is provided with flange 9.Punch forming process is simple, welds through the flange in the split 89 and makes up two splits 8, and technology is prone to realize that cost is lower.
As a kind of improvement to the foregoing description, the said chamber 2 that crosses can be double layer construction, can be filled with thermal insulating material in the cavity between the said double-deck inner and outer wall.Double layer construction helps the waste gas insulation, reduces the cooling of waste gas, improves the three-element catalytic conversion ratio; Fill insulant material more helps the waste gas insulation in the cavity that double layer construction constitutes, thereby further reduces the cooling of waste gas, improves the three-element catalytic conversion ratio, reduces discharge of harmful gases.Wherein, said thermal insulating material can be plastic foam, mineral cotton goods, heat-preservation cotton etc.
Once more referring to shown in Figure 2; Be provided with first between the waste gas outlet of the suction port of said first exhaust branch pipe 21 and said first turbosupercharger 3 and flexibly connect and be provided with second between the waste gas outlet of suction port and said second turbosupercharger 31 of portion 71 and said second exhaust branch pipe 22 and flexibly connect portion 72, flexibly connect portion 71 and said second such as said first and flexibly connect portion 72 and can be bellows.With said first flexibly connect portion 71 and said first exhaust branch pipe 21 suction port weld together; And with said second flexibly connect portion 72 and said second exhaust branch pipe 22 suction port weld together; The suction port that helps each exhaust branch pipe is connected with the waste gas outlet of corresponding turbosupercharger effectively; Improve manufacturability, reduce the waste gas disclosure risk, avoid potential safety hazard.
Once more referring to shown in Figure 1, said first flexibly connects portion 71 flexibly connects portion 72 with the waste gas outlet and said second of said first turbosupercharger 3 and adopts ring-shaped clip 12 to be connected with the waste gas outlet of said second turbosupercharger 31.The use ring-shaped clip connects, and makes that exhaust branch pipe and turbosupercharger are easy to connect, and both connect and do not receive spatial limitation when fastening.
Further, the said chamber 2 that crosses welds together with said ternary catalyzing unit 4.Welding procedure is prone to realize, cost is low.
Preferably, the said chamber 2 that crosses, said first exhaust branch pipe 21 and said second exhaust branch pipe 22 are one-body molded.The operation that connects said cross chamber 2 and said first exhaust branch pipe 21 and said second exhaust branch pipe 22 has been saved in the three in one moulding, has reduced technology, has also reduced the risk that waste gas is revealed from the joint simultaneously.
The above; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by said protection domain with claim.
Claims (10)
1. the exhausted gas post-processing system of a twin turbocharged engine; Comprise: first exhaust branch pipe and second exhaust branch pipe; The suction port of said first exhaust branch pipe connects the waste gas outlet of first turbosupercharger; The suction port of said second exhaust branch pipe connects the waste gas outlet of second turbosupercharger, and the air outlet of said first exhaust branch pipe is connected ternary catalyzing unit with the air outlet of said second exhaust branch pipe; It is characterized in that,
Between the air outlet of the air outlet of said first exhaust branch pipe and said second exhaust branch pipe and said ternary catalyzing unit, be provided with the chamber that crosses; Be connected to the said chamber that crosses after the air outlet of the air outlet of said first exhaust branch pipe and said second exhaust branch pipe is converged, the said chamber that crosses connects said ternary catalyzing unit.
2. the exhausted gas post-processing system of twin turbocharged engine according to claim 1; It is characterized in that the cross section in the said chamber that crosses enlarges from concourse to the said ternary catalyzing unit of the air outlet of the air outlet of said first exhaust branch pipe and said second exhaust branch pipe gradually.
3. the exhausted gas post-processing system of twin turbocharged engine according to claim 1 and 2 is characterized in that, the concourse of the air outlet of the air outlet of said first exhaust branch pipe and said second exhaust branch pipe is provided with dividing plate in the said chamber that crosses.
4. the exhausted gas post-processing system of twin turbocharged engine according to claim 2 is characterized in that, the said chamber that crosses is combined by stamping forming two splits, and the joint of said split is provided with flange.
5. the exhausted gas post-processing system of twin turbocharged engine according to claim 4 is characterized in that, the said chamber that crosses is a double layer construction.
6. the exhausted gas post-processing system of twin turbocharged engine according to claim 5 is characterized in that, is filled with thermal insulating material in the cavity between the said double-deck inner and outer wall.
7. the exhausted gas post-processing system of twin turbocharged engine according to claim 1 and 2; It is characterized in that, be provided with first between the waste gas outlet of the suction port of said first exhaust branch pipe and said first turbosupercharger and flexibly connect and be provided with second between the waste gas outlet of suction port and said second turbosupercharger of portion and said second exhaust branch pipe and flexibly connect portion.
8. the exhausted gas post-processing system of twin turbocharged engine according to claim 7; It is characterized in that said first portion that flexibly connects adopts ring-shaped clip to be connected with the waste gas outlet and said second of said first turbosupercharger portion that flexibly connects with the waste gas outlet of said second turbosupercharger.
9. the exhausted gas post-processing system of twin turbocharged engine according to claim 8 is characterized in that, said chamber and the said ternary catalyzing unit of crossing welds together.
10. the exhausted gas post-processing system of twin turbocharged engine according to claim 9, the said chamber that crosses, said first exhaust branch pipe and said second exhaust branch pipe are one-body molded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100503355A CN102588051B (en) | 2012-02-29 | 2012-02-29 | Waste gas post-processing system of twin-turbo supercharged engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100503355A CN102588051B (en) | 2012-02-29 | 2012-02-29 | Waste gas post-processing system of twin-turbo supercharged engine |
Publications (2)
| Publication Number | Publication Date |
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| CN102588051A true CN102588051A (en) | 2012-07-18 |
| CN102588051B CN102588051B (en) | 2013-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012100503355A Expired - Fee Related CN102588051B (en) | 2012-02-29 | 2012-02-29 | Waste gas post-processing system of twin-turbo supercharged engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2703615A1 (en) * | 2012-08-28 | 2014-03-05 | Hyundai Motor Company | Exhaust system comprising a turbocharger, catalytic converter and a connection pipe |
| CN104632324A (en) * | 2013-11-13 | 2015-05-20 | 蒋小华 | Automobile three-way catalytic secondary combustion device |
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|---|---|---|---|---|
| JPH03115735A (en) * | 1989-09-27 | 1991-05-16 | Mazda Motor Corp | Controller of engine with supercharger |
| JPH03213619A (en) * | 1990-01-17 | 1991-09-19 | Toyota Motor Corp | Engine with supercharger |
| US20110239630A1 (en) * | 2010-03-30 | 2011-10-06 | Gm Global Technology Operations, Inc. | Closely coupled exhaust aftertreatment system for an internal combustion engine having twin turbochargers |
| DE102011015255A1 (en) * | 2010-03-30 | 2011-11-10 | Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) | Closely coupled exhaust aftertreatment device for a turbo-charged internal combustion engine |
| CN102292529A (en) * | 2009-01-26 | 2011-12-21 | 丰田自动车株式会社 | Controller of vehicle |
-
2012
- 2012-02-29 CN CN2012100503355A patent/CN102588051B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03115735A (en) * | 1989-09-27 | 1991-05-16 | Mazda Motor Corp | Controller of engine with supercharger |
| JPH03213619A (en) * | 1990-01-17 | 1991-09-19 | Toyota Motor Corp | Engine with supercharger |
| CN102292529A (en) * | 2009-01-26 | 2011-12-21 | 丰田自动车株式会社 | Controller of vehicle |
| US20110239630A1 (en) * | 2010-03-30 | 2011-10-06 | Gm Global Technology Operations, Inc. | Closely coupled exhaust aftertreatment system for an internal combustion engine having twin turbochargers |
| DE102011015255A1 (en) * | 2010-03-30 | 2011-11-10 | Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) | Closely coupled exhaust aftertreatment device for a turbo-charged internal combustion engine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2703615A1 (en) * | 2012-08-28 | 2014-03-05 | Hyundai Motor Company | Exhaust system comprising a turbocharger, catalytic converter and a connection pipe |
| CN103670638A (en) * | 2012-08-28 | 2014-03-26 | 现代自动车株式会社 | Exhaust system between turbocharger and catalytic converter |
| CN103670638B (en) * | 2012-08-28 | 2018-01-23 | 现代自动车株式会社 | Gas extraction system between turbocharger and catalytic converter |
| CN104632324A (en) * | 2013-11-13 | 2015-05-20 | 蒋小华 | Automobile three-way catalytic secondary combustion device |
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| CN102588051B (en) | 2013-11-27 |
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