CN105257348A - Pressure symmetric bypass device of double-runner turbocharger - Google Patents
Pressure symmetric bypass device of double-runner turbocharger Download PDFInfo
- Publication number
- CN105257348A CN105257348A CN201510719726.5A CN201510719726A CN105257348A CN 105257348 A CN105257348 A CN 105257348A CN 201510719726 A CN201510719726 A CN 201510719726A CN 105257348 A CN105257348 A CN 105257348A
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- China
- Prior art keywords
- turbine case
- gate passage
- waste gate
- air inlet
- bypass
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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
Abstract
The invention relates to a double-runner turbocharger, in particular to a pressure symmetric bypass device of the double-runner turbocharger and belongs to the technical field of supercharging of engine turbines. The pressure symmetric bypass device comprises a turbine shell. A first turbine shell waste gas bypass channel and a second turbine shell waste gas bypass channel are arranged on the upper portion in the turbine shell. A first turbine shell air inlet runner and a second turbine shell air inlet runner are arranged on the lower portion in the turbine shell, wherein the first turbine shell air inlet runner is communicated with the first turbine shell waste gas bypass channel, and the second turbine shell air inlet runner is communicated with the second turbine shell waste gas bypass channel. The first turbine shell air inlet runner and the second turbine shell air inlet runner are symmetrically arranged. According to the pressure symmetric bypass device of the double-runner turbocharger, the pressure difference between the two air inlet runners can be balanced, and therefore the overall combustion efficiency of an engine is improved; and meanwhile the impact abrasion of bypass airflow on a bypass valve block can be reduced.
Description
Technical field
The present invention relates to a kind of Double flow path turbo-charger, the symmetrical by-pass collar of a kind of pressure of Double flow path turbo-charger, belongs to engine turbine supercharging technology field specifically.
Background technique
Turbosupercharger is actually a kind of air compressor, increases air inflow by pressurized air.It is utilize motor to discharge waste gas inertia impulsive force to promote the turbine in turbine case, turbine drives again coaxial pressure impeller, the air that pressure impeller force feed is sent here by air-strainer pipeline, makes it supercharging and enters cylinder.When engine speed increases, the waste gas velocity of discharge and secondary speed also synchronously increase, pressure impeller just compresses more air and enters cylinder, the pressure of air and density increase the more fuel that can burn, the rotating speed of corresponding increase fuel quantity and adjustment motor, just can increase the output power of motor.When motor be at a high speed large load condition time; in order to avoid boost pressure and supercharger speed too high; usually a part of waste gas can be bled off by exhaust gas by-pass valve; this part waste gas can not be done work by turbine; but be directly bypassed to turbine case outlet, thus boost pressure and supercharger speed are controlled in safety range.
In the prior art, there are two kinds of exhaust gas bypass structures, single valve single hole bypass and single valve diplopore bypass.For single valve single hole bypass, exhaust gas by-pass valve is placed in usually on the runner of outlet, after bypass valve is opened, before the whirlpool of two runners, pressure is inconsistent, thus causes two groups of cylinder pressures being connected respectively with two runners inconsistent, namely charging efficiency is inconsistent, air quantity maldistribution, and the oil of each cylinder spray is the same, thus cause burning uneven, each cylinder-firing pressure is also inconsistent, causes the combustion efficiency of overall engine to reduce.For single valve diplopore bypass, recently the patent disclosing this structure is US2009/0028694, in the structure that this patent describes, bypass flow outlet is placed in turbine case side, namely bypass flow is identical with main air flow direction, this structure has following shortcoming: first, two bypass passageways asymmetric (length and cross section difference), therefore after bypass valve valve block is opened, pressure difference between two air inlet runners still exists, affect the integral combustion efficiency of motor, meanwhile, also larger to the impact wear of bypass valve valve block; The second, the complex structure of air inlet runner and bypass passageways, cost is high, and reliability is poor; 3rd, when valve block is closed, the interference ratio of bypass passageways space to main air flow is larger.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, thus provide a kind of pressure of Double flow path turbo-charger symmetrical by-pass collar, when bypass valve valve block is opened, pressure difference between thorough balance two air inlet runners, improve the integral combustion efficiency of motor, and then raising fuel economy, reduce the impact wear to bypass valve valve block simultaneously.
According to technological scheme provided by the invention, the symmetrical by-pass collar of pressure of Double flow path turbo-charger comprises turbine case, it is characterized in that: turbine case internal upper part is provided with the first turbine case waste gate passage and the second turbine case waste gate passage, in turbine case, bottom is provided with the first turbine case air inlet runner and the second turbine case air inlet runner, first turbine case air inlet runner is communicated with the first turbine case waste gate passage, and the second turbine case air inlet runner is communicated with the second turbine case waste gate passage; First turbine case waste gate passage and the second turbine case waste gate passage are symmetrical arranged; Turbine case internal upper part is provided with bypass valve valve block, bypass valve valve block connects the pitman arm shaft that bypass valve valve block can be driven to rotate, when bypass valve valve block turns to closed condition, bypass valve valve block can seal the first turbine case waste gate passage and the second turbine case waste gate passage simultaneously; when rocking arm drives bypass valve valve block to turn to opening state, the first turbine case waste gate passage and the second turbine case waste gate passage are opened; Connecting rocker arm outside described pitman arm shaft, connects pneumatic actuator outside rocking arm, and pneumatic actuator can drive pitman arm shaft to rotate, thus controls the unlatching of bypass valve valve block or close.
Further, pitman arm shaft is provided with lining, and lining is between bypass valve valve block and turbine case madial wall.
Compared with the prior art the present invention has the following advantages:
Structure of the present invention is simple, compact, reasonable, and two bypass passageways of the present invention are symmetrical arranged, and space is little, little to main air flow interference; During bypass, the present invention can balance the pressure difference between two air inlet runners, thus improves overall engine combustion efficiency, also can reduce the impact wear of bypass flow to bypass valve valve block simultaneously; Secondly, bypass passageways structure of the present invention is simple, and manufacture cost comparatively; Again, because bypass passageways segmentation wall is short and simple, the gas leakage risk under thermal fatigue and Warm status is low.
Accompanying drawing explanation
Fig. 1 is the stereogram of bypass valve valve block opening state of the present invention.
Fig. 2 is the sectional view of bypass valve valve block closed condition of the present invention.
Fig. 3 is bypass passageways plan view of the present invention.
Description of reference numerals: 1-turbine case, 2a-first turbine case waste gate passage, 2b-second turbine exhaust bypass passageways, 3a-first turbine case air inlet runner, 3b-second turbine case air inlet runner, 4-bypass valve valve block, 5-pneumatic actuator, 6-rocking arm, 7-pitman arm shaft, 8-lining.
Embodiment
Embodiment in is by reference to the accompanying drawings further described by the present invention below:
As shown in Fig. 1 ~ 3, the present invention mainly comprises turbine case 1, turbine case 1 internal upper part is provided with the first turbine case waste gate passage 2a and the second turbine case waste gate passage 2b, in turbine case 1, bottom is provided with the first turbine case air inlet runner 3a and the second turbine case air inlet runner 3b, first turbine case air inlet runner 3a is communicated with the first turbine case waste gate passage 2a, and the second turbine case air inlet runner 3b is communicated with the second waste gate passage 2b.
First turbine case air inlet runner 3a and the second turbine case air inlet runner 3b is symmetrical arranged.Area and the shape of the first turbine case waste gate passage 2a and the second turbine case waste gate passage 2b design targetedly according to the pressure difference of two runners.In order to realize the symmetrical bypass of pressure, the cross-section area of the first turbine case waste gate passage 2a and the second turbine case waste gate passage 2b can be set to unequal according to embody rule, normally S
2b>S
2a.
Turbine case 1 internal upper part is provided with bypass valve valve block 4, bypass valve valve block 4 connects the pitman arm shaft 7 that bypass valve valve block 4 can be driven to rotate, when bypass valve valve block 4 turns to closed condition, bypass valve valve block 4 can seal the first turbine case waste gate passage 2a and the second turbine case waste gate passage 2b simultaneously; When rocking arm 6 drives bypass valve valve block 4 to turn to opening state, the first turbine case waste gate passage 2a and the second turbine case waste gate passage 2b opens.
Connecting rocker arm 6 outside described pitman arm shaft 7, connects pneumatic actuator 5 outside rocking arm 6, pneumatic actuator 5 can drive pitman arm shaft 7 to rotate, thus control bypass valve valve block 4 is opened or closed.
Described pitman arm shaft 7 is provided with lining 8, and lining 8 is between bypass valve valve block 4 and turbine case 1 madial wall, and lining 8 avoids bypass valve valve block 4 when rotating and the wearing and tearing that cause of turbine case 1 madial wall friction.
Working principle of the present invention is: when motor is in low velocity zone, in order to obtain enough boost pressures, improve Engine torque, bypass valve valve block is in closed condition under the effect of pneumatic actuator, two bypass passageways are closed, whole waste gas is done work by turbine.When motor is in high speed high load working condition, the exhaust gas velocity that motor is discharged increases, in order to control boost pressure and supercharger speed within the limits prescribed, bypass valve valve block is under the effect of pneumatic actuator and turbine case inlet exhaust gas pressure, axis around pitman arm shaft is flipped open, a part of waste gas in two air inlet runners is discharged to turbine case outlet respectively by two bypass passageways, without turbine acting, thus controls boost pressure and supercharger speed.
Compared with bypass passageways described in patent US2009/0028694, two bypass passageways of the present invention are symmetrical arranged, and space is little, little to main air flow interference; In addition, during bypass, the pressure difference between two air inlet runners can be balanced, thus improve overall engine combustion efficiency, also can reduce the impact wear of bypass flow to bypass valve valve block simultaneously; Secondly, bypass passageways structure of the present invention is simple, and manufacture cost comparatively; Again, because bypass passageways segmentation wall is short and simple, the gas leakage risk under thermal fatigue and Warm status is low.
In above-described embodiment, in order to thoroughly balance the pressure difference between two air inlet runners, realize the symmetrical bypass of pressure, the discharge area of bypass passageways is designed to unequal, precisely, is S
2b>S
2a, S
2bfor the discharge area of the second waste gate passage exported away from turbine case, S
2afor the discharge area of the first waste gate passage near turbine case outlet.
Claims (2)
1. the symmetrical by-pass collar of the pressure of a Double flow path turbo-charger, comprise turbine case (1), it is characterized in that: turbine case (1) internal upper part is provided with the first turbine case waste gate passage (2a) and the second turbine case waste gate passage (2b), turbine case (1) interior bottom is provided with the first turbine case air inlet runner (3a) and the second turbine case air inlet runner (3b), first turbine case air inlet runner (3a) is communicated with the first turbine case waste gate passage (2a), and the second turbine case air inlet runner (3b) is communicated with the second turbine case waste gate passage (2b); First turbine case waste gate passage (2a) and the second turbine case waste gate passage (2b) are symmetrical arranged; Turbine case (1) internal upper part is provided with bypass valve valve block (4), the pitman arm shaft (7) that the upper connection of bypass valve valve block (4) can drive bypass valve valve block (4) to rotate, when bypass valve valve block (4) turns to closed condition, bypass valve valve block (4) can seal the first turbine case waste gate passage (2a) and the second turbine case waste gate passage (2b) simultaneously; when rocking arm (6) drives bypass valve valve block (4) to turn to opening state, the first turbine case waste gate passage (2a) and the second turbine case waste gate passage (2b) are opened; Described pitman arm shaft (7) outside connecting rocker arm (6), rocking arm (6) outside connects pneumatic actuator (5), and pneumatic actuator (5) can drive pitman arm shaft (7) to rotate, thus controls bypass valve valve block (4) unlatching or close.
2. the symmetrical by-pass collar of the pressure of Double flow path turbo-charger as claimed in claim 1, it is characterized in that: described pitman arm shaft (7) is provided with lining (8), lining (8) is positioned between bypass valve valve block (4) and turbine case (1) madial wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510719726.5A CN105257348B (en) | 2015-10-29 | 2015-10-29 | The symmetrical by-pass collar of pressure of Double flow path turbo-charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510719726.5A CN105257348B (en) | 2015-10-29 | 2015-10-29 | The symmetrical by-pass collar of pressure of Double flow path turbo-charger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105257348A true CN105257348A (en) | 2016-01-20 |
| CN105257348B CN105257348B (en) | 2017-06-23 |
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| CN201510719726.5A Active CN105257348B (en) | 2015-10-29 | 2015-10-29 | The symmetrical by-pass collar of pressure of Double flow path turbo-charger |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524516A (en) * | 2016-06-15 | 2017-12-29 | 通用汽车环球科技运作有限责任公司 | Waste gate closing position location feature part |
| CN108869013A (en) * | 2018-08-16 | 2018-11-23 | 湖南天雁机械有限责任公司 | Deflation valve and dual channel exhaust-driven turbo-charger exhaust-gas turbo charger |
| CN110100084A (en) * | 2016-10-21 | 2019-08-06 | 康明斯有限公司 | The method for designing turbine |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59229018A (en) * | 1983-05-26 | 1984-12-22 | ザ・ギヤレツト・コ−ポレ−シヨン | Turbo charger |
| EP1382816A2 (en) * | 2002-07-19 | 2004-01-21 | Audi Ag | Arrangement of at least two turbo compressors |
| US20090028694A1 (en) * | 2006-10-20 | 2009-01-29 | Kazuo Naemura | Structure of Exhaust Turbocharger Having Waste Gate Valve |
| CN101975105A (en) * | 2010-09-14 | 2011-02-16 | 康跃科技股份有限公司 | Double-channel turbine bypass bleeding device |
| KR20110062189A (en) * | 2009-12-03 | 2011-06-10 | 현대자동차주식회사 | Twin scroll turbine housing of turbo charger |
| CN102182544A (en) * | 2011-03-01 | 2011-09-14 | 康跃科技股份有限公司 | Air inlet regulating device of flow-passage-changeable turbine |
| DE102010013702A1 (en) * | 2010-04-01 | 2011-10-06 | Continental Automotive Gmbh | Turbine for exhaust gas turbocharger, particularly for motor vehicle, has turbine housing and waste gate-valve which has waste gate-flap that controls flue gas volume passing through waste gate-valve |
| CN203476407U (en) * | 2013-05-15 | 2014-03-12 | 无锡康明斯涡轮增压技术有限公司 | Turbocharger volute assembly |
| CN104110300A (en) * | 2014-08-06 | 2014-10-22 | 无锡康明斯涡轮增压技术有限公司 | Turbocharger |
-
2015
- 2015-10-29 CN CN201510719726.5A patent/CN105257348B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59229018A (en) * | 1983-05-26 | 1984-12-22 | ザ・ギヤレツト・コ−ポレ−シヨン | Turbo charger |
| EP1382816A2 (en) * | 2002-07-19 | 2004-01-21 | Audi Ag | Arrangement of at least two turbo compressors |
| US20090028694A1 (en) * | 2006-10-20 | 2009-01-29 | Kazuo Naemura | Structure of Exhaust Turbocharger Having Waste Gate Valve |
| KR20110062189A (en) * | 2009-12-03 | 2011-06-10 | 현대자동차주식회사 | Twin scroll turbine housing of turbo charger |
| DE102010013702A1 (en) * | 2010-04-01 | 2011-10-06 | Continental Automotive Gmbh | Turbine for exhaust gas turbocharger, particularly for motor vehicle, has turbine housing and waste gate-valve which has waste gate-flap that controls flue gas volume passing through waste gate-valve |
| CN101975105A (en) * | 2010-09-14 | 2011-02-16 | 康跃科技股份有限公司 | Double-channel turbine bypass bleeding device |
| CN102182544A (en) * | 2011-03-01 | 2011-09-14 | 康跃科技股份有限公司 | Air inlet regulating device of flow-passage-changeable turbine |
| CN203476407U (en) * | 2013-05-15 | 2014-03-12 | 无锡康明斯涡轮增压技术有限公司 | Turbocharger volute assembly |
| CN104110300A (en) * | 2014-08-06 | 2014-10-22 | 无锡康明斯涡轮增压技术有限公司 | Turbocharger |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107524516A (en) * | 2016-06-15 | 2017-12-29 | 通用汽车环球科技运作有限责任公司 | Waste gate closing position location feature part |
| CN110100084A (en) * | 2016-10-21 | 2019-08-06 | 康明斯有限公司 | The method for designing turbine |
| CN110100084B (en) * | 2016-10-21 | 2021-06-08 | 康明斯有限公司 | Method of designing a turbomachine |
| CN108869013A (en) * | 2018-08-16 | 2018-11-23 | 湖南天雁机械有限责任公司 | Deflation valve and dual channel exhaust-driven turbo-charger exhaust-gas turbo charger |
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| Publication number | Publication date |
|---|---|
| CN105257348B (en) | 2017-06-23 |
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