CN102588051B - 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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- CN102588051B CN102588051B CN2012100503355A CN201210050335A CN102588051B CN 102588051 B CN102588051 B CN 102588051B CN 2012100503355 A CN2012100503355 A CN 2012100503355A CN 201210050335 A CN201210050335 A CN 201210050335A CN 102588051 B CN102588051 B CN 102588051B
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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, advantage is to promote engine power by raising secondary speed, increase suction pressure, shortcoming is that the turbo lag phenomenon is arranged, be that motor waste gas kinetic energy when rotating speed is low is less, can not drive the turbine High Rotation Speed 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.For the turbo lag phenomenon of exhaust gas turbocharge, can adopt two turbosupercharger in parallel to solve, when motor was slow-revving, less waste gas can drive the turbine High Rotation Speed to produce enough suction pressures, reduces the turbo lag effect.
Under the prerequisite that reduces the turbo lag effect, motor also should meet various minimizing discharges and improve the regulation of fuel economy, therefore very important to the exhaust after-treatment exported by turbosupercharger.Petrol engine generally adopts three-element catalytic to carry out purified treatment to reduce the discharge of automobile harmful gas to waste gas at present.
For twin turbocharged engine exhaust after-treatment in parallel, what prior art adopted is two cover exhausted gas post-processing systems, namely for each turbosupercharger, a set of exhausted gas post-processing system is set, due to the restriction that is subjected to installing space, waste gas is larger from after the turbosupercharger discharge, entering the distance flowed before the three-element catalytic carrier, the pipeline more complicated, cause the engine exhaust decrease temperature and pressure larger, adding engine exhaust can not be equably by the three-element catalytic carrier in exhausted gas post-processing system, therefore finally cause the three-element catalytic transformation efficiency low, especially in the engine cold-start stage, three-element catalytic transforming agent light-off time in 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 prior art.
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 row gas branch pipe and second row gas branch pipe, the suction port of described first row gas branch pipe connects the waste gas outlet of the first turbosupercharger, the suction port of described second row gas branch pipe connects the waste gas outlet of the second turbosupercharger, and the air outlet of described first row gas branch pipe is connected ternary catalyzing unit with the air outlet of described second row gas branch pipe; Wherein, between the air outlet of the air outlet of described first row gas branch pipe and described second row gas branch pipe and described ternary catalyzing unit, be provided with the chamber that crosses, the air outlet of the air outlet of described first row gas branch pipe and described second row gas branch pipe is connected to the described chamber that crosses after converging, the described chamber that crosses connects described ternary catalyzing unit.
Further, the cross section in the described chamber that crosses enlarges gradually from concourse to the described ternary catalyzing unit of the air outlet of the air outlet of described first row gas branch pipe and described second row gas branch pipe.
Secondly, in the described chamber that crosses, the concourse of the air outlet of the air outlet of described first row gas branch pipe and described second row gas branch pipe is provided with dividing plate.
Again, the described chamber that crosses is formed by stamping forming two Split assembleds, and the joint of described split is provided with flange.
Preferably, the described chamber that crosses is double layer construction.
Further, in the cavity between described double-deck inner and outer wall, be filled with thermal insulating material.
Secondly, between the waste gas outlet of the suction port of described first row gas branch pipe and described the first turbosupercharger, being provided with first flexibly connects and between the waste gas outlet of the suction port of section and described second row gas branch pipe and described the second turbosupercharger, is provided with second and flexibly connects section.
Again, described first flexibly connect section and the waste gas outlet and described second of described the first turbosupercharger and flexibly connect section and adopt ring-shaped clip to be connected with the waste gas outlet of described the second turbosupercharger.
Further, described chamber and the described ternary catalyzing unit of crossing welds together.
Preferably, the described chamber that crosses, described first row gas branch pipe and described second row gas branch pipe are one-body molded.
The exhausted gas post-processing system of the twin turbocharged engine that the embodiment of the present invention provides, make waste gas from described the first turbosupercharger and described the second turbosupercharger enter after described first row gas branch pipe and described second row gas branch pipe directly to cross and enter the described chamber that crosses, the described chamber that crosses connects described ternary catalyzing unit, is equal to by the described chamber that crosses two original cover exhausted gas post-processing systems are united two into one.Use a set of exhausted gas post-processing system, saved installing space, make line arrangement simpler, shortened the exhaust distance, be conducive to reduce the waste gas decrease temperature and pressure, make exhaust gas temperature by ternary catalyzing unit higher than the reaction temperature of three-element catalytic transforming agent, improve the three-element catalytic conversion ratio, also can guarantee simultaneously that waste gas, uniformly by the three-element catalytic carrier, further improves the three-element catalytic transformation efficiency.Especially in the engine cold-start stage, exhaust gas temperature is low, and after adopting a set of exhausted gas post-processing system consisted of the described chamber that crosses, waste gas is lowered the temperature few in flow process, be conducive to shorten three-element catalytic transforming agent light-off time, further improves catalytic conversion efficiency.
The accompanying drawing explanation
Fig. 1 is the structural representation of motor with exhausted gas post-processing system of embodiment of the present invention twin turbocharged engine;
Fig. 2 is the structural representation of the exhausted gas post-processing system of embodiment of the present invention twin turbocharged engine;
Fig. 3 is the structural representation in the chamber that crosses shown in Figure 2;
Fig. 4 is the structural representation of the inside, chamber that crosses shown in Figure 2.
Reference character:
The 2-chamber that crosses, 21-first row gas branch pipe, 22-second row gas branch pipe, 3-the first turbosupercharger, 31-the second turbosupercharger, the 4-ternary catalyzing unit, 71-first flexibly connects section, and 72-second flexibly connects section, the 8-split, 9-flange, 11-dividing plate, 12-ring-shaped clip.
Embodiment
Below in conjunction with the exhausted gas post-processing system of accompanying drawing to embodiment of the present invention twin turbocharged engine, be described in detail.
Should be clear and definite, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skills, not making all other embodiments that obtain under the creative work prerequisite, belong to the scope of protection of the invention.
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 row gas branch pipe 21 and second row gas branch pipe 22, the suction port of described first row gas branch pipe 21 connects the waste gas outlet of the first turbosupercharger 3, the suction port of described second row gas branch pipe 22 connects the waste gas outlet of the second turbosupercharger 31, and the air outlet of the air outlet of described first row gas branch pipe 21 and described second row gas branch pipe 22 is connected ternary catalyzing unit 4; Wherein, between the air outlet of the air outlet of described first row gas branch pipe 21 and described second row gas branch pipe 22 and described ternary catalyzing unit 4, be provided with the chamber 2 that crosses, the air outlet of the air outlet of described first row gas branch pipe 21 and described second row gas branch pipe 22 is connected to the described chamber 2 that crosses after converging, the described chamber 2 that crosses connects described ternary catalyzing unit 4.
The exhausted gas post-processing system of the twin turbocharged engine that the embodiment of the present invention provides, make waste gas from described the first turbosupercharger and described the second turbosupercharger enter after described first row gas branch pipe and described second row gas branch pipe directly to cross and enter the described chamber that crosses, the described chamber that crosses connects described ternary catalyzing unit, is equal to by the described chamber that crosses two original cover exhausted gas post-processing systems are united two into one.Use a set of exhausted gas post-processing system, saved installing space, make line arrangement simpler, shortened the exhaust distance, be conducive to reduce the waste gas decrease temperature and pressure, make exhaust gas temperature by ternary catalyzing unit higher than the reaction temperature of three-element catalytic transforming agent, improve the three-element catalytic conversion ratio, also can guarantee simultaneously that waste gas, uniformly by the three-element catalytic carrier, further improves the three-element catalytic transformation efficiency.Especially in the engine cold-start stage, exhaust gas temperature is low, and after adopting a set of exhausted gas post-processing system consisted of the described chamber that crosses, waste gas is lowered the temperature few in flow process, be conducive to shorten three-element catalytic transforming agent light-off time, further improves catalytic conversion efficiency.
Referring to shown in Figure 2, the cross section in the described chamber 2 that crosses enlarges gradually from concourse to the described ternary catalyzing unit 4 of the air outlet of the air outlet of described first row gas branch pipe 21 and described second row gas branch pipe 22.The described cross section that crosses chamber 2 enlarges gradually, reduced the pressure loss of waste gas in flow process, be reduce relative with the pressure ratio of air outlet of the suction port of waste gas in the chamber that crosses, thereby waste gas is reduced at the flow velocity of the air outlet in the described chamber that crosses, like this time of stopping in ternary catalyzing unit 4 of waste gas relatively long, be conducive to improve the three-element catalytic conversion ratio; Because the exhaust gas pressure loss reduces, closer to cylindrical, namely waste gas is more even by ternary catalyzing unit, more is conducive to improve the three-element catalytic conversion ratio when waste gas passes through ternary catalyzing unit simultaneously.
Referring to Fig. 3 and shown in Figure 4, the concourse of the air outlet of the described interior described first row gas branch pipe 21 in chamber 2 that crosses and the air outlet of described second row gas branch pipe 22 is provided with dividing plate 11.11 pairs of waste gas by described first row gas branch pipe 21 and described second row gas branch pipe 22 of described dividing plate carry out water conservancy diversion, make two strands of waste gas successfully introduce the described chamber 2 mobile along the pipeline in the described chamber 2 that crosses that crosses, by the three-element catalytic carrier, be conducive to improve the three-element catalytic transformation efficiency equably.
Referring to shown in Figure 3, the described chamber 2 that crosses is combined by stamping forming two splits 8 again, and the joint of described split 8 is provided with flange 9.Punch forming process is simple, welds and combines two splits 8 by the flange 9 in split 8, and technique easily realizes, cost compare is low.
As a kind of improvement to above-described embodiment, the described chamber 2 that crosses can be double layer construction, can be filled with thermal insulating material in the cavity between described double-deck inner and outer wall.Double layer construction is conducive to the waste gas insulation, reduces the cooling of waste gas, improves the three-element catalytic conversion ratio; In the cavity that double layer construction forms, fill insulant material more is conducive to the waste gas insulation, thereby further reduces the cooling of waste gas, improves the three-element catalytic conversion ratio, reduces the discharge of harmful gas.Wherein, described thermal insulating material can be plastic foam, mineral cotton goods, heat-preservation cotton etc.
Again referring to shown in Figure 2, between the waste gas outlet of the suction port of described first row gas branch pipe 21 and described the first turbosupercharger 3, be provided with first and flexibly connect and between the waste gas outlet of the suction port of section 71 and described second row gas branch pipe 22 and described the second turbosupercharger 31, be provided with second and flexibly connect section 72, flexibly connect section 71 and described second and flexibly connect section 72 and can be bellows such as described first.The described first suction port that flexibly connects section 71 and described first row gas branch pipe 21 is welded together, and the described second suction port that flexibly connects section 72 and described second row gas branch pipe 22 is welded together, the suction port that is conducive to each exhaust branch pipe is connected effectively with the waste gas outlet of corresponding turbosupercharger, improve manufacturability, reduce the waste gas disclosure risk, avoid potential safety hazard.
Again referring to shown in Figure 1, described first flexibly connects section 71 flexibly connects section 72 with the waste gas outlet and described second of described the first turbosupercharger 3 and adopts ring-shaped clip 12 to be connected with the waste gas outlet of described the second turbosupercharger 31.The use ring-shaped clip connects, and makes exhaust branch pipe and turbosupercharger easy to connect, and both connect when fastening and are not subjected to spatial constraints.
Further, the described chamber 2 that crosses welds together with described ternary catalyzing unit 4.Welding procedure easily realizes, cost is low.
Preferably, the described chamber 2 that crosses, described first row gas branch pipe 21 and described second row gas branch pipe 22 are one-body molded.The three in one moulding, saved the operation that connects described cross chamber 2 and described first row gas branch pipe 21 and described second row gas branch pipe 22, reduced technique, also reduced the risk that waste gas is revealed from joint simultaneously.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection domain with claim.
Claims (9)
1. the exhausted gas post-processing system of a twin turbocharged engine, comprise: first row gas branch pipe and second row gas branch pipe, the suction port of described first row gas branch pipe connects the waste gas outlet of the first turbosupercharger, the suction port of described second row gas branch pipe connects the waste gas outlet of the second turbosupercharger, and the air outlet of described first row gas branch pipe is connected ternary catalyzing unit with the air outlet of described second row gas branch pipe; It is characterized in that,
Between the air outlet of the air outlet of described first row gas branch pipe and described second row gas branch pipe and described ternary catalyzing unit, be provided with the chamber that crosses, the air outlet of the air outlet of described first row gas branch pipe and described second row gas branch pipe is connected to the described chamber that crosses after converging, the described chamber that crosses connects described ternary catalyzing unit;
In the described chamber that crosses, the concourse of the air outlet of the air outlet of described first row gas branch pipe and described second row gas branch pipe is provided with dividing plate.
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 described chamber that crosses enlarges gradually from concourse to the described ternary catalyzing unit of the air outlet of the air outlet of described first row gas branch pipe and described second row gas branch pipe.
3. the exhausted gas post-processing system of twin turbocharged engine according to claim 2, is characterized in that, the described chamber that crosses is formed by stamping forming two Split assembleds, and the joint of described split is provided with flange.
4. the exhausted gas post-processing system of twin turbocharged engine according to claim 3, is characterized in that, the described chamber that crosses is double layer construction.
5. the exhausted gas post-processing system of twin turbocharged engine according to claim 4, is characterized in that, is filled with thermal insulating material in the cavity between described double-deck inner and outer wall.
6. the exhausted gas post-processing system of twin turbocharged engine according to claim 1 and 2, it is characterized in that, between the waste gas outlet of the suction port of described first row gas branch pipe and described the first turbosupercharger, be provided with first and flexibly connect and between the waste gas outlet of the suction port of section and described second row gas branch pipe and described the second turbosupercharger, be provided with second and flexibly connect section.
7. the exhausted gas post-processing system of twin turbocharged engine according to claim 6, it is characterized in that, described first flexibly connects section and the waste gas outlet and described second of described the first turbosupercharger flexibly connects section and adopts ring-shaped clip to be connected with the waste gas outlet of described the second turbosupercharger.
8. the exhausted gas post-processing system of twin turbocharged engine according to claim 7, is characterized in that, described chamber and the described ternary catalyzing unit of crossing welds together.
9. the exhausted gas post-processing system of twin turbocharged engine according to claim 8, the described chamber that crosses, described first row gas branch pipe and described second row gas branch pipe are one-body molded.
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| 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 |
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| 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 |
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| CN102588051A CN102588051A (en) | 2012-07-18 |
| CN102588051B true CN102588051B (en) | 2013-11-27 |
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| KR101394037B1 (en) * | 2012-08-28 | 2014-05-09 | 기아자동차 주식회사 | Exhaust gas exhaust system |
| CN104632324B (en) * | 2013-11-13 | 2017-08-22 | 蒋小华 | A kind of automobile three-element catalytic after burner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| 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 |
| US8276366B2 (en) * | 2010-03-30 | 2012-10-02 | GM Global Technology Operations LLC | Closely coupled exhaust aftertreatment system for an internal combustion engine having twin turbochargers |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102292529A (en) * | 2009-01-26 | 2011-12-21 | 丰田自动车株式会社 | Controller of vehicle |
| 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 |
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