CN102705052A - Module type two-stage exhaust pipe system turbocharging system - Google Patents
Module type two-stage exhaust pipe system turbocharging system Download PDFInfo
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- CN102705052A CN102705052A CN2012101886985A CN201210188698A CN102705052A CN 102705052 A CN102705052 A CN 102705052A CN 2012101886985 A CN2012101886985 A CN 2012101886985A CN 201210188698 A CN201210188698 A CN 201210188698A CN 102705052 A CN102705052 A CN 102705052A
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Abstract
The invention discloses a module type two-stage exhaust pipe system turbocharging system in the technical field of internal-combustion engines. The module type two-stage exhaust pipe system turbocharging system comprises upper exhaust pipe sections, lower exhaust pipe sections and a mixer; the upper exhaust pipe sections, the lower exhaust pipe sections and the mixer form a two-stage exhaust pipe system; each upper exhaust pipe section or lower exhaust pipe section is formed by fixedly connecting a main exhaust branch, a main exhaust pipe section, a secondary exhaust pipe section and an upper secondary exhaust branch or a lower secondary exhaust branch; the secondary exhaust pipe section consists of an upper pipe section and a lower pipe section; and the upper secondary exhaust branch, the lower secondary exhaust branch and the secondary exhaust pipe section are combined to form a secondary exhaust pipe. In a scavenging stage, the secondary exhaust pipe has an isolating function and reduces interference; and when an exhaust valve has a large opening, the main exhaust pipe is a main exhaust channel and the utilization efficiency of exhaust energy is improved. The module type two-stage exhaust pipe system turbocharging system is compact in structure and can be produced modularly.
Description
Affiliated technical field
The present invention relates to a kind of pressurization system of internal combustion engine, particularly a kind of module type secondary exhaust piping turbo charge system belongs to technical field of internal combustion engines.
Background technique
Along with the development of society and the raising of environmental requirement, increasingly high to the power character and the emission performance requirement of diesel engine, adopting supercharging technology is a kind of efficient ways that improves diesel engine power, reduces fuel consumption rate and reduction discharging.Diesel engine is a main power source in producing, living as a kind of important dynamic power machine.Powerful diesel engine adopts turbocharging technology more at present; 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, scavenging is smooth and easy, mapping good, simple in structure be the overall target of present diesel exhaust gas piping optimal design.So far, 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, and complex structure; Compare with pulse system pulse converter supercharging system turbine inlet less, 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.In existing technology; Utility model patent 97242566.7 disclosed mixed pulse converter pressurization systems can be utilized the exhaust pulses energy preferably, and step response is better; Structure is simple relatively; Reduce the better performances that scavenging is disturbed, but the structure of this system is sharply complicated along with the increase of cylinder of diesel engine number, its restricted application.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 a kind of module type secondary exhaust piping turbo charge system, can effectively reduce scavenging and disturb, reduce the vent systems resistance, can make full use of the exhaust pulses energy.
Summary of the invention
Deficiency to above-mentioned existing technology; The technical problem that the present invention will solve provides a kind of module type secondary exhaust piping turbo charge system; The scavenging that can reduce in the outlet pipe is disturbed, and can make full use of the exhaust pulses energy, but the seriation module type is produced; Be convenient to stack mounting, be applicable to the motor of various cylinder numbers, various supercharging levels.
For realizing above-mentioned purpose; The technological scheme that the present invention adopted is: this system comprises up-set type exhaust pipeline section, underneath type exhaust pipeline section, mixer; Up-set type exhaust pipeline section, underneath type exhaust pipeline section and mixer are combined to form the secondary exhaust piping; Up-set type exhaust pipeline section constitutes for one by pipeline section, secondary outlet pipe lower tube section and the secondary exhaust branch pipe of up-set type on main exhaust arm, main exhaust pipeline section, the secondary outlet pipe are fixed; Underneath type exhaust pipeline section constitutes for one by pipeline section, secondary outlet pipe lower tube section and the secondary exhaust branch pipe of underneath type on main exhaust arm, main exhaust pipeline section, the secondary outlet pipe are fixed; Mixer is responsible for to manage with mixer by mixer and is fixedly constituted for one; The main exhaust arm connects the main exhaust pipeline section, and the entry and exit of the secondary exhaust branch pipe of up-set type connect pipeline section and main exhaust arm on the secondary outlet pipe respectively, and the entry and exit of the secondary exhaust branch pipe of underneath type connect secondary outlet pipe lower tube section and main exhaust arm respectively; The axis of the secondary exhaust branch pipe of up-set type is consistent with the axial direction of place cylinder main exhaust arm; The axis of the secondary exhaust branch pipe of underneath type is consistent with the axial direction of place cylinder main exhaust arm, and the inlet of the secondary exhaust branch pipe of up-set type 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 inlet of the secondary exhaust branch pipe of underneath type is the inlet diameter of 0.1～0.5 times of main exhaust arm to the distance of the inlet of main exhaust arm; The long-pending ratio range of the entrance section of the secondary exhaust branch pipe of up-set type and secondary exhaust branch pipe of underneath type and main exhaust arm is 0.05～0.4; According to firing order, cylinder is divided into two groups, one group with up-set type exhaust pipeline section; Another group is with underneath type exhaust pipeline section; Main exhaust arm and main exhaust pipeline section are combined into main exhaust, and pipeline section, secondary outlet pipe lower tube section are combined into secondary outlet pipe on the secondary exhaust branch pipe of up-set type, the secondary exhaust branch pipe of underneath type, the secondary outlet pipe, and the main exhaust outlet connects the inlet that mixer is responsible for; The outlet of secondary outlet pipe connects the inlet of mixer time pipe, and the outlet of mixer links to each other with the turbine inlet.
Beneficial effect of the present invention:
At scavenging period, the inblock cylinder throughput is little, and exhaust valve pressure is low; The main exhaust internal pressure is higher, and the turbine ingress is a low pressure area, and exhaust flows to mixer through secondary outlet pipe; Up-set type exhaust pipeline section and underneath type exhaust pipeline section play buffer action to the scavenging of cylinder, reduce scavenging and disturb.
When the exhaust valve aperture was big, main exhaust arm internal pressure was higher, and the entrance section of secondary outlet pipe is long-pending less relatively; Throttle effect is obvious; Exhaust mainly flows into turbosupercharger via main exhaust, and the main exhaust inner chamber is smooth, can reduce flow losses; Can make full use of the energy of exhaust pulses, improve energy transfer efficiency.
Compact structure of the present invention, it is little to take up room, but the seriation module type produce, easy accessibility is applicable to the motor of various cylinder numbers, various supercharging levels.
Description of drawings
Fig. 1 is a system architecture schematic representation of the present invention;
Fig. 2 is a up-set type outlet pipe segment structure schematic representation among the present invention;
Fig. 3 is a up-set type exhaust pipeline section dextrad view among the present invention;
Fig. 4 is the echelon sectional view along A-A line among Fig. 3;
Fig. 5 is a underneath type outlet pipe segment structure schematic representation among the present invention;
Fig. 6 is a underneath type exhaust pipeline section dextrad view among the present invention;
Fig. 7 is the echelon sectional view along B-B line among Fig. 6;
Fig. 8 is the structural representation of mixer among the present invention.
Embodiment
Below in conjunction with accompanying drawing the embodiment of the present invention on eight cylinder machines 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 up-set type exhaust pipeline section 1, underneath type exhaust pipeline section 2, mixer 3, up-set type exhaust pipeline section 1, underneath type exhaust pipeline section 2 and mixer 3 are combined to form the secondary exhaust piping; Like Fig. 2, Fig. 3, shown in Figure 4, up-set type exhaust pipeline section 1 constitutes for one by the secondary exhaust branch pipe of pipeline section 6 on main exhaust arm 4, main exhaust pipeline section 5, the secondary outlet pipe, secondary outlet pipe lower tube section 7 and up-set type 8 is fixed; Like Fig. 5, Fig. 6, shown in Figure 7, underneath type exhaust pipeline section 2 constitutes for one by the secondary exhaust branch pipe of pipeline section 6 on main exhaust arm 4, main exhaust pipeline section 5, the secondary outlet pipe, secondary outlet pipe lower tube section 7 and underneath type 9 is fixed; As shown in Figure 8, mixer 3 is responsible for 10 by mixer and is constituted for one with mixer time pipe 11 is fixed; Like Fig. 2, shown in Figure 6, main exhaust arm 4 connects main exhaust pipeline section 5; Like Fig. 2, Fig. 3, shown in Figure 4; The entry and exit of the secondary exhaust branch pipe 8 of up-set type connect pipeline section 6 and main exhaust arm 4 on the secondary outlet pipe respectively; The axis of the secondary exhaust branch pipe 8 of up-set type is consistent with the axial direction of place cylinder main exhaust arm 4, and the inlet of the secondary exhaust branch pipe 8 of up-set type is inlet diameters of 0.1～0.5 times of main exhaust arm 4 to the distance of the inlet of main exhaust arm 4; Like Fig. 5, Fig. 6, shown in Figure 7; The entry and exit of the secondary exhaust branch pipe 9 of underneath type connect secondary outlet pipe lower tube section 7 and main exhaust arm 4 respectively; The axis of the secondary exhaust branch pipe 9 of underneath type is consistent with the axial direction of place cylinder main exhaust arm 4, and the inlet of the secondary exhaust branch pipe 9 of underneath type is inlet diameters of 0.1～0.5 times of main exhaust arm 4 to the distance of the inlet of main exhaust arm 4; The secondary exhaust branch pipe 8 of up-set type is 0.05～0.4 with the secondary exhaust branch pipe 9 of underneath type with the long-pending ratio range of the entrance section of main exhaust arm 4; According to firing order, cylinder is divided into two groups, it is minimum that scavenging is disturbed, and one group with up-set type exhaust pipeline section 2, and another is organized with underneath type exhaust pipeline section 3; Main exhaust arm 4 is combined into main exhaust with main exhaust pipeline section 5, and pipeline section 6, secondary outlet pipe lower tube section 7 are combined into secondary outlet pipe on the secondary exhaust branch pipe of the secondary exhaust branch pipe of up-set type 8, underneath type 9, the secondary outlet pipe; Main exhaust outlet connection mixer is responsible for 10 inlet, and the outlet of secondary outlet pipe connects the inlet of mixer time pipe 11, and the mixer person in charge 10 outlet links to each other with the turbine inlet.
With eight cylinder diesels is example; When the firing order of eight cylinder diesels is 1-6-2-4-8-3-7-5-1, cylinder number be between 1,4,5,8 the cylinder scavenging interference ratio a little less than, cylinder number be between 2,3,6,7 the cylinder scavenging interference ratio a little less than; The cylinder of cylinder numbers 1,4,5,8 is divided into first group; With cylinder number is that 2,3,6,7 cylinder is divided into second group, and first group is adopted 1, the second group of up-set type exhaust pipeline section to adopt underneath type exhaust pipeline section 2; Up-set type exhaust pipeline section 1, underneath type exhaust pipeline section 2 and mixer 3 are combined to form the secondary exhaust piping; As shown in Figure 1, wherein main exhaust arm 4 is combined into main exhaust with main exhaust pipeline section 5, and pipeline section 6 and secondary outlet pipe lower tube section 7 are combined into two secondary outlet pipes up and down on the secondary exhaust branch pipe of the secondary exhaust branch pipe of up-set type 8, underneath type 9, the secondary outlet pipe.The upward pipe of main exhaust, secondary outlet pipe reaches three relatively independent zones of pipe formation down, and main exhaust directly links to each other with last pipe or between managing down, and the pipe of going up of secondary outlet pipe links to each other through main exhaust with following pipe indirectly.At scavenging period, the inblock cylinder throughput is less, and exhaust valve place pressure is lower, and the main exhaust internal pressure is higher, and exhaust mainly flows to turbine via secondary outlet pipe.Though pipe or following pipe a little less than scavenging interference between the same group of cylinder, can not influence scavenging on one group of interior shared secondary outlet pipe of each cylinder; Do not manage and following relative buffer action of managing owing to going up of secondary outlet pipe between the cylinder on the same group, can reduce the scavenging interference, like Fig. 1, Fig. 2, shown in Figure 5.
The entry and exit of the secondary exhaust branch pipe 8 of up-set type connect pipeline section 6 and main exhaust arm 4 on the secondary outlet pipe respectively; The entry and exit of the secondary exhaust branch pipe 9 of underneath type connect secondary outlet pipe lower tube section 7 and main exhaust arm 4 respectively, and the axis of the axis of the secondary exhaust branch pipe 8 of up-set type or the secondary exhaust branch pipe 9 of underneath type is consistent with the axial direction of place cylinder main exhaust arm 4; The inlet of secondary exhaust branch pipe 8 of up-set type or the secondary exhaust branch pipe 9 of underneath type is inlet diameters of 0.43 times of main exhaust arm 4 to the distance of the inlet of main exhaust arm 4; The inlet that makes secondary exhaust branch pipe 8 of up-set type and the secondary exhaust branch pipe 9 of underneath type is as far as possible away from main exhaust; Increase the interior air-flow of main exhaust and blow back into the resistance in the secondary outlet pipe; Strengthen the blanketing effect between main exhaust and the secondary outlet pipe, help reducing scavenging and disturb, like Fig. 2, Fig. 4, Fig. 5, shown in Figure 7.
The secondary exhaust branch pipe 8 of up-set type is 0.11 with the secondary exhaust branch pipe 9 of underneath type with the long-pending ratio of the entrance section of main exhaust arm 4; The secondary exhaust branch pipe 8 of up-set type is long-pending less relatively with secondary exhaust branch pipe 9 entrance sections of underneath type; Flow to the secondary outlet pipe of flowing through has restriction, and when the engine exhaust port flow was big, exhaust mainly flowed to turbine through main exhaust; Improve the pulse energy utilization ratio, like Fig. 2, Fig. 3, Fig. 5, shown in Figure 6.
Claims (7)
1. module type secondary exhaust piping turbo charge system; Comprise up-set type exhaust pipeline section (1), underneath type exhaust pipeline section (2), mixer (3); It is characterized in that up-set type exhaust pipeline section (1), underneath type exhaust pipeline section (2) and mixer (3) are combined to form the secondary exhaust piping, according to firing order, are divided into two groups with cylinder; One group with up-set type exhaust pipeline section (1), and another is organized with underneath type exhaust pipeline section (2).
2. a kind of module type secondary exhaust piping turbo charge system according to claim 1; It is characterized in that; Said up-set type exhaust pipeline section (1) is fixed with the secondary exhaust branch pipe of up-set type (8) by pipeline section (6), secondary outlet pipe lower tube section (7) on main exhaust arm (4), main exhaust pipeline section (5), the secondary outlet pipe to be the one formation, main exhaust arm (4) connection main exhaust pipeline section (5).
3. a kind of module type secondary exhaust piping turbo charge system according to claim 1; It is characterized in that; Said underneath type exhaust pipeline section (2) is fixed with the secondary exhaust branch pipe of underneath type (9) by pipeline section (6), secondary outlet pipe lower tube section (7) on main exhaust arm (4), main exhaust pipeline section (5), the secondary outlet pipe to be the one formation, main exhaust arm (4) connection main exhaust pipeline section (5).
4. a kind of module type secondary exhaust piping turbo charge system according to claim 1 is characterized in that, it is that one constitutes that said mixer (3) is managed (11) fixed by the mixer person in charge (10) and mixer.
5. a kind of module type secondary exhaust piping turbo charge system according to claim 2; It is characterized in that; The entry and exit of the secondary exhaust branch pipe of said up-set type (8) connect pipeline section on the secondary outlet pipe (6) and main exhaust arm (4) respectively; The axis of the secondary exhaust branch pipe of up-set type (8) is consistent with the axial direction of place cylinder main exhaust arm (4), and the inlet of the secondary exhaust branch pipe of up-set type (8) is the inlet diameter of 0.1～0.5 times of main exhaust arm (4) to the distance of the inlet of main exhaust arm (4).
6. a kind of module type secondary exhaust piping turbo charge system according to claim 3; It is characterized in that; The entry and exit of the secondary exhaust branch pipe of said underneath type (9) connect secondary outlet pipe lower tube section (7) and main exhaust arm (4) respectively; The axis of the secondary exhaust branch pipe of underneath type (9) is consistent with the axial direction of place cylinder main exhaust arm (4), and the inlet of the secondary exhaust branch pipe of underneath type (9) is the inlet diameter of 0.1～0.5 times of main exhaust arm (4) to the distance of the inlet of main exhaust arm (4).
7. according to claim 1,2,3 described a kind of module type secondary exhaust piping turbo charge systems; It is characterized in that; Secondary exhaust branch pipe of said up-set type (8) and the secondary exhaust branch pipe of underneath type (9) are 0.05～0.4 with the long-pending ratio range of the entrance section of main exhaust arm (4); Said main exhaust arm (4) is combined into main exhaust with main exhaust pipeline section (5); Pipeline section (6), secondary outlet pipe lower tube section (7) are combined into secondary outlet pipe on the secondary exhaust branch pipe of up-set type (8), the secondary exhaust branch pipe of underneath type (9), the secondary outlet pipe; The main exhaust outlet connects the inlet that mixer is responsible for (10), and the outlet of secondary outlet pipe connects the inlet of mixer time pipe (11), and the outlet that mixer is responsible for (10) links to each other with the turbine inlet.
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| CN2012101886985A CN102705052A (en) | 2012-06-11 | 2012-06-11 | Module type two-stage exhaust pipe system turbocharging system |
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| CN2012101886985A CN102705052A (en) | 2012-06-11 | 2012-06-11 | Module type two-stage exhaust pipe system turbocharging system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2312331Y (en) * | 1997-11-03 | 1999-03-31 | 上海交通大学 | Mixing type pulsation converter exhaust system |
| CN1598265A (en) * | 2004-08-04 | 2005-03-23 | 湛江海洋大学 | Variable module type impulse sapercharging device of turbocharging diesel engine |
| JP2007056848A (en) * | 2005-08-26 | 2007-03-08 | Toyota Motor Corp | Control device for internal combustion engine |
| CN101149016A (en) * | 2007-11-01 | 2008-03-26 | 上海交通大学 | Gas flow guiding composite pulse conversion turbo supercharging system |
| CN203009031U (en) * | 2012-06-11 | 2013-06-19 | 山东交通学院 | Modular two-stage exhaust piping turbocharging system |
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2012
- 2012-06-11 CN CN2012101886985A patent/CN102705052A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2312331Y (en) * | 1997-11-03 | 1999-03-31 | 上海交通大学 | Mixing type pulsation converter exhaust system |
| CN1598265A (en) * | 2004-08-04 | 2005-03-23 | 湛江海洋大学 | Variable module type impulse sapercharging device of turbocharging diesel engine |
| JP2007056848A (en) * | 2005-08-26 | 2007-03-08 | Toyota Motor Corp | Control device for internal combustion engine |
| CN101149016A (en) * | 2007-11-01 | 2008-03-26 | 上海交通大学 | Gas flow guiding composite pulse conversion turbo supercharging system |
| CN203009031U (en) * | 2012-06-11 | 2013-06-19 | 山东交通学院 | Modular two-stage exhaust piping turbocharging system |
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Application publication date: 20121003 |