CN102705053A - Pulse complex exhaust pipe system supercharging system - Google Patents
Pulse complex exhaust pipe system supercharging system Download PDFInfo
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- CN102705053A CN102705053A CN201210188699XA CN201210188699A CN102705053A CN 102705053 A CN102705053 A CN 102705053A CN 201210188699X A CN201210188699X A CN 201210188699XA CN 201210188699 A CN201210188699 A CN 201210188699A CN 102705053 A CN102705053 A CN 102705053A
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Abstract
The invention discloses a pulse complex exhaust pipe system supercharging system and belongs to the technical field of internal combustion engines. The pulse complex exhaust pipe system supercharging system comprises a main exhaust pipe, main exhaust branches, a bypass pipe and an air header; the inlet of each main exhaust branch is connected with an exhaust passage of an engine; the outlet of each main exhaust branch is connected with the main exhaust pipe; the inlet of the bypass pipe is connected with each main exhaust branch and the outlet of the bypass pipe is connected with the air header; the outlet of the main exhaust pipe is connected with the inlet of the air header; the outlet of the air header is connected with a turbine inlet; the bypass pipe extends to the air header along the exhaust flowing direction in the main exhaust branches and the main exhaust pipe and is connected with the side wall of the air header, and the inner cavity of the bypass pipe is communicated with the inner cavity of the air header; and a bypass pipe is arranged on each main exhaust branch of each cylinder and led to the air header. The pulse complex exhaust pipe system supercharging system has the advantages that scavenging interference is small, the energy utilization efficiency is high, and the pulse complex exhaust pipe system supercharging system occupies a small space and can be arranged compactly.
Description
Affiliated technical field
The present invention relates to a kind of pressurization system of internal combustion engine, the compound exhaust piping turbo charge system of particularly a kind of pulsed belongs to technical field of internal combustion engines.
Background technique
Diesel engine is a kind of widely used power equipment; Supercharging technology is that present diesel engine satisfies one of indispensable technology of target for energy-saving and emission-reduction; Turbo charge system is as the critical system of supercharged diesel engine, and power character, Economy and the emission performance of supercharged diesel engine all had material impact.In order to improve the diesel engine thermal efficiency, reduce diesel emission, reduce the specific power cost of production, the specific power and the supercharging level of diesel engine are increasingly high, and this reliability to pressurization system, transient response property and scavenging uniformity have proposed requirements at the higher level.Full performance of operating condition is good, the exhaust energy utilization ratio high, cylinder scavenging is smooth and easy, step response good, exhaust pipe structure simply is the overall target of present diesel exhaust gas piping optimal design.Around this design objective, the researcher is developed and seven kinds of pressurization system forms: constant pressure charging system, impulse pressure charging system, pulse converter supercharging system, module type pulse pressurization system, mixed pulse converter pressurization system, module type multifunctional pulse conversion turbocharging system and variable exhaust guard system.
The scavenging of level pressure system is disturbed little, and the pumping work loss is little, but the exhaust pulses capacity usage ratio is low, low-load performance is relatively poor; Pulse system can avoid scavenging to disturb preferably, and the exhaust pulses capacity usage ratio is high, the scavenging good uniformity, and low-load performance is good, but turbine has a plurality of imports, and turbocharger efficiency is low, should not on the more diesel engine of cylinder number, use; Compare the pulse converter supercharging system with pulse system, the turbine inlet is few, and turbine efficiency is high, but the reducing of pulse converter has increased gas-flow resistance; Module type pulse pressurization system exhaust piping is simple in structure, is convenient to produce, and can utilize the exhaust pulses energy preferably, and turbine efficiency is higher, but this system reduces the poor-performing that scavenging is disturbed.The mixed pulse converter pressurization system that utility model patent 97242566.7 discloses; Can utilize the exhaust pulses energy preferably; Step response is better, and structure is simple relatively, reduces the better performances that scavenging is disturbed; The complex structure degree increases its restricted application but this system is along with the increase of cylinder of diesel engine number.The module type multifunctional pulse conversion turbocharging system that patent of invention 200810203029.4 discloses; Structure is simpler; But the exhaust branch pipe extension in arch cross section is near the outlet pipe axis, and flow losses are bigger in causing managing, and this system's reduction scavenging interference capability is limited.The variable exhaust pipe system schema that patent of invention 200810203054.2, patent of invention 200810203055.7 and patent of invention 200920210502.1 propose; Through control valve turbo charge system is switched between pulse pressure-charging and constant pressure supercharging (or certainly pressing supercharging); Can take into account the requirement of height operating mode, but disturb not significantly effect, and this type systematic need be confirmed handoff boundary according to the motor operation characteristic reducing scavenging; Increase the system complex degree, reduced reliability.The invention provides the compound exhaust piping turbo charge system of a kind of pulsed, can effectively reduce scavenging and disturb, reduce the vent systems resistance, make full use of the exhaust pulses energy.
Summary of the invention
In order to improve the deficiency of existing technology; The present invention proposes the compound exhaust piping turbo charge system of a kind of pulsed, this pressurization system can effectively reduce scavenging to be disturbed, and reduces the vent systems resistance; Improve the exhaust back pressure nonuniformity of each cylinder of diesel engine; Improve the exhaust pulses capacity usage ratio, be convenient to stack mounting, be applicable to the motor of various cylinder numbers.
The present invention realizes through following technological scheme: the compound exhaust piping turbo charge system of a kind of pulsed; It comprises main exhaust, main exhaust arm, bypass tube, gas collecting tube; The inlet of main exhaust arm connects the engine exhaust road; The outlet of main exhaust arm connects main exhaust, and the inlet of bypass tube connects the main exhaust arm, and the outlet of bypass tube connects gas collecting tube; The outlet of main exhaust connects the import of gas collecting tube; The outlet of gas collecting tube connects the turbine inlet, and the inlet of bypass tube is the inlet diameter of 0.1～0.5 times of main exhaust arm to the distance of the inlet of main exhaust arm, and the long-pending ratio range that amasss with main exhaust arm entrance section of the entrance section of bypass tube is 0.05～0.2; Bypass tube extends to gas collecting tube along flow direction of exhaust gases in main exhaust arm and the main exhaust, all has bypass tube to lead to gas collecting tube on each cylinder main exhaust arm.
Beneficial effect of the present invention:
At scavenging period, the inblock cylinder throughput is little, and the exhaust valve outlet pressure is low, owing to receive the influence that scavenging is disturbed, house steward's internal pressure is higher, and the turbine ingress is a low pressure area, and exhaust mainly flows to the turbine inlet by bypass tube, reduces scavenging to disturb; When the exhaust valve aperture was big, main exhaust arm internal pressure was higher, and the bypass tube entrance section is long-pending less relatively, and throttle effect is obvious, and air-flow mainly in the main exhaust arm flows into main exhaust, has improved the pulse energy utilization ratio; The bypass tube diameter is less, and it is little to take up room, and can compactly arrange.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the present invention on four-cylinder elaborated, present embodiment is a prerequisite with technological scheme of the present invention, provided detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
As shown in Figure 1; The present invention includes main exhaust 1, main exhaust arm 2, bypass tube 3, gas collecting tube 4, the inlet of main exhaust arm 2 connects the engine exhaust road, and the outlet of main exhaust arm 2 connects main exhaust 1; The inlet of bypass tube 3 connects main exhaust arm 2; The outlet of bypass tube 3 connects gas collecting tube 4, and the outlet of main exhaust 1 connects the import of gas collecting tube 4, and the outlet of gas collecting tube 4 connects the turbine inlet; The inlet of bypass tube 3 is inlet diameters of 0.1～0.5 times of main exhaust arm 2 to the distance of the inlet of main exhaust arm 2; The long-pending ratio range that amasss with main exhaust arm 2 entrance sections of the entrance section of bypass tube 3 is 0.05～0.2, and bypass tube 3 extends to gas collecting tube 4 along main exhaust arm 2 and main exhaust 1 interior flow direction of exhaust gases, all has bypass tube 3 to lead to gas collecting tube 4 on each cylinder main exhaust arm 2.
With the four-cylinder is example; The inlet of each cylinder main exhaust arm 2 connects the engine exhaust road; The outlet of main exhaust arm 2 connects main exhaust 1, and the inlet of bypass tube 3 connects main exhaust arm 2, and the outlet of bypass tube 3 connects gas collecting tube 4; The outlet of main exhaust 1 connects the import of gas collecting tube 4; The outlet of gas collecting tube 4 connects the turbine inlet, and the inlet of bypass tube 3 is inlet diameters of 0.2 times of main exhaust arm 2 to the distance of the inlet of main exhaust arm 2, and the long-pending ratio that amasss with main exhaust arm 2 entrance sections of the entrance section of bypass tube 3 is 0.15; Bypass tube 3 extends to gas collecting tube 4 along main exhaust arm 2 and main exhaust 1 interior flow direction of exhaust gases, all has bypass tube 3 to lead to gas collecting tube 4 on each cylinder main exhaust arm 2.
Scavenging period at any cylinder of motor; This cylinder extraction flow is little, and the exhaust valve outlet pressure is lower, and a certain cylinder in 1 company of main exhaust cylinder is in the bigger stage of extraction flow; In main exhaust 1, form higher pressure; At this moment, because turbine enters the mouth to the attenuation of pressure, the pressure in the gas collecting tube 4 is relatively low.Therefore, at scavenging period, the exhaust of cylinder is mainly arrived gas collecting tube 4 through bypass tube 3, and then flows into turbine.In the exhaust mid-term of arbitrary cylinder,, in main exhaust arm 2, set up higher pressure because this cylinder extraction flow is bigger; There are enough driving forces to order about blast air and go into main exhaust 1; The sectional area of circulation pipeline becomes the principal element of restriction flow size, again because main exhaust arm 2 is bigger with the sectional area ratio of bypass tube 3, therefore; Exhaust mainly flows into main exhaust 1 from main exhaust arm 2, can improve the capacity usage ratio of exhaust.
Claims (1)
1. compound exhaust piping turbo charge system of pulsed; Comprise main exhaust (1), main exhaust arm (2), bypass tube (3), gas collecting tube (4); The inlet of main exhaust arm (2) connects the engine exhaust road; The outlet of main exhaust arm (2) connects main exhaust (1), it is characterized in that the inlet of bypass tube (3) connects main exhaust arm (2), and the outlet of bypass tube (3) connects gas collecting tube (4); The outlet of main exhaust (1) connects the import of gas collecting tube (4); The outlet of gas collecting tube (4) connects the turbine inlet, and the inlet of bypass tube (3) is the inlet diameter of 0.1～0.5 times of main exhaust arm (2) to the distance of the inlet of main exhaust arm (2), and the long-pending ratio range that amasss with main exhaust arm (2) entrance section of the entrance section of bypass tube (3) is 0.05～0.2; Bypass tube (3) extends to gas collecting tube (4) along main exhaust arm (2) and the interior flow direction of exhaust gases of main exhaust (1), all has bypass tube (3) to lead to gas collecting tube (4) on each cylinder main exhaust arm (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210188699XA CN102705053A (en) | 2012-06-11 | 2012-06-11 | Pulse complex exhaust pipe system supercharging system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210188699XA CN102705053A (en) | 2012-06-11 | 2012-06-11 | Pulse complex exhaust pipe system supercharging system |
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| CN102705053A true CN102705053A (en) | 2012-10-03 |
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| CN201210188699XA Pending CN102705053A (en) | 2012-06-11 | 2012-06-11 | Pulse complex exhaust pipe system supercharging system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027734A1 (en) * | 1995-03-07 | 1996-09-12 | Schatz Thermo Gastech Gmbh | Arrangement for reducing exhaust gas emissions from an internal combustion engine with an exhaust gas catalytic converter |
| US20070039319A1 (en) * | 2005-02-17 | 2007-02-22 | Takuya Kajita | Exhaust manifold |
| JP2007056848A (en) * | 2005-08-26 | 2007-03-08 | Toyota Motor Corp | Control device for internal combustion engine |
| JP2009228515A (en) * | 2008-03-21 | 2009-10-08 | Nissan Motor Co Ltd | Bypass passage structure |
| CN202628247U (en) * | 2012-06-11 | 2012-12-26 | 山东交通学院 | Pulse type compound exhaust pipe line turbocharging system |
-
2012
- 2012-06-11 CN CN201210188699XA patent/CN102705053A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027734A1 (en) * | 1995-03-07 | 1996-09-12 | Schatz Thermo Gastech Gmbh | Arrangement for reducing exhaust gas emissions from an internal combustion engine with an exhaust gas catalytic converter |
| US20070039319A1 (en) * | 2005-02-17 | 2007-02-22 | Takuya Kajita | Exhaust manifold |
| JP2007056848A (en) * | 2005-08-26 | 2007-03-08 | Toyota Motor Corp | Control device for internal combustion engine |
| JP2009228515A (en) * | 2008-03-21 | 2009-10-08 | Nissan Motor Co Ltd | Bypass passage structure |
| CN202628247U (en) * | 2012-06-11 | 2012-12-26 | 山东交通学院 | Pulse type compound exhaust pipe line turbocharging system |
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Application publication date: 20121003 |