CN102926852A - Module pulse conversion exhaust pipe for straight diesel engine - Google Patents
Module pulse conversion exhaust pipe for straight diesel engine Download PDFInfo
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- CN102926852A CN102926852A CN2012104254879A CN201210425487A CN102926852A CN 102926852 A CN102926852 A CN 102926852A CN 2012104254879 A CN2012104254879 A CN 2012104254879A CN 201210425487 A CN201210425487 A CN 201210425487A CN 102926852 A CN102926852 A CN 102926852A
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- diesel engine
- pulse conversion
- exhaust pipe
- straight
- module pulse
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Abstract
The invention provides a module pulse conversion (MPC) exhaust pipe for a straight diesel engine. The module pulse conversion exhaust pipe is characterized in that a shrinkage coefficient f is equal to 0.6; a diameter of a main pipe d is equal to 0.66D; and an intersection angle of a branch pipe and the main pipe theta is equal to 30 degrees. In a partial load working condition, the acceleration response property of a diesel engine can be improved; the fuel consumption and the exhaust temperature can be reduced; the pressurizing pressure of the diesel engine is increased; and the similar effects of constant-pressure pressurizing can be obtained in the high working condition of the diesel engine. Furthermore, the scheme has the advantages of simple structure, low cost, convenience in installation and obvious effect.
Description
Technical field
The invention belongs to Diesel Engine Technique Field, relate in particular to a kind of straight-row diesel engine and change (MPC) outlet pipe with module type pulse.
Background technique
Straight-row diesel engine is used constant pressure charging system, in the situation that operating mode commonly used is the effect that high operating mode (as using as generator set) can obtain fine use, but in the situation that operating mode commonly used is partial load condition (as using as the Ship Propeling main frame), the key technical indexes of the diesel engines such as its booster response performance, fuel consume, delivery temperature, boost pressure is all performed poor.Although impulse pressure charging system can be obtained good effect under partial load condition is used, but to be subject to the condition restriction that the cylinder number is necessary for 3 multiple.And module type pulse conversion (being called for short MPC) pressurization system has been taken into account the advantage of pulse pressure-charging and constant pressure supercharging in theory, both can improve the boost pressure under the sub load, can take into account ability roughly the same with constant pressure supercharging under high operating mode, can not be that the diesel engine of 3 multiple is used at the cylinder number yet.For a long time, straight-row diesel engine is used the MPC outlet pipe, its main structure parameters generally respectively value be: the shrinkage coefficient ratio of outlet pipe import sectional area (the outlet pipe aditus laryngis place sectional area with) f=40%～80%, house steward inner diameter d=0.5D～0.6D (D is cylinder bore), the angle of cut (arm and house steward's the angle of cut) θ=20 °～40 °.But, carry out the selection of structural parameter at a kind of like this wide range, often can only when full load, reach comparatively desirable effect, and when sub load, the key technical indexes such as its booster response performance, fuel consume, delivery temperature, boost pressure fall flat all.
Summary of the invention
Purpose of the present invention overcomes the deficiency of above-mentioned prior art exactly, provide a kind of straight-row diesel engine to change (MPC) outlet pipe with module type pulse, can make diesel engine under partial load condition, promote booster response performance, reduce fuel oil consumption and the delivery temperature of diesel engine, the boost pressure of raising diesel engine.
The object of the present invention is achieved like this: a kind of straight-row diesel engine module type pulse conversion exhaust conduit is characterized in that its shrinkage coefficient f=0.61, house steward diameter d=0.66D, arm and house steward's angle of cut θ=30 °.
Adopt the solution of the present invention, under the operating mode of sub load, the booster response performance raising of diesel engine, fuel consume and delivery temperature reduce, the boost pressure of diesel engine improves, and can obtain the effect similar to constant pressure supercharging when the high operating mode of diesel engine.And this scheme is simple in structure, and is with low cost, easy for installation, successful.
Description of drawings
Fig. 1 is that the straight-row diesel engine of the embodiment of the invention is changed (MPC) exhaust pipe structure principle schematic with module type pulse.
Fig. 2 is for adopting embodiment of the invention straight-row diesel engine with the performance index table under the array 8 cylinder 240mm bore diesel engine partial load conditions of module type pulse conversion (MPC) outlet pipe.
Embodiment
For the purpose, technological scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technological scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiments.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment who obtains under the creative work prerequisite.
Referring to Fig. 1, the straight-row diesel engine of embodiment of the invention MPC outlet pipe, its main structure parameters is: shrinkage coefficient f=0.61, house steward diameter d=0.66D (D is cylinder bore), arm and house steward's angle of cut θ=30 °.
Referring to Fig. 2, the MPC outlet pipe of the present embodiment is used for test result on the 8 cylinder 240mm bore diesel engines in upright arrangement, Ps is the boost pressure curve among the figure, ntk is the supercharger speed curve, Pz is the pressure of explosion curve, Tr is that arm is on average arranged warm curve, and Tt is house steward's delivery temperature curve, and ge is the rate of fuel consumption curve.The results showed, under the operating mode of sub load, the booster response performance raising of diesel engine, fuel consume and delivery temperature reduce, the boost pressure of diesel engine improves, and can obtain the effect similar to constant pressure supercharging when the high operating mode of diesel engine.And this scheme is simple in structure, and is with low cost, easy for installation, successful.
It should be noted that at last: above embodiment only in order to technological scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technological scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characteristics wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technological scheme.
Claims (1)
1. a straight-row diesel engine module type pulse conversion exhaust conduit is characterized in that its shrinkage coefficient f=0.61, house steward diameter d=0.66D, arm and house steward's angle of cut θ=30 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104254879A CN102926852A (en) | 2012-10-31 | 2012-10-31 | Module pulse conversion exhaust pipe for straight diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104254879A CN102926852A (en) | 2012-10-31 | 2012-10-31 | Module pulse conversion exhaust pipe for straight diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102926852A true CN102926852A (en) | 2013-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012104254879A Pending CN102926852A (en) | 2012-10-31 | 2012-10-31 | Module pulse conversion exhaust pipe for straight diesel engine |
Country Status (1)
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| CN (1) | CN102926852A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019267A (en) * | 2017-11-17 | 2018-05-11 | 无锡开普动力有限公司 | Large bore engine modular exhaust gas manifold structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201546793U (en) * | 2009-11-27 | 2010-08-11 | 中国北车集团大连机车车辆有限公司 | Diesel engine exhaust pipe piping structure |
| JP4595849B2 (en) * | 2006-03-18 | 2010-12-08 | トヨタ自動車株式会社 | Internal combustion engine |
| CN202325785U (en) * | 2011-11-21 | 2012-07-11 | 重庆潍柴发动机厂 | Asymmetrical simple exhaust pulse converter |
-
2012
- 2012-10-31 CN CN2012104254879A patent/CN102926852A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4595849B2 (en) * | 2006-03-18 | 2010-12-08 | トヨタ自動車株式会社 | Internal combustion engine |
| CN201546793U (en) * | 2009-11-27 | 2010-08-11 | 中国北车集团大连机车车辆有限公司 | Diesel engine exhaust pipe piping structure |
| CN202325785U (en) * | 2011-11-21 | 2012-07-11 | 重庆潍柴发动机厂 | Asymmetrical simple exhaust pulse converter |
Non-Patent Citations (1)
| Title |
|---|
| 刘会猛等: "螺旋流增压排气系统性能模拟研究", 《第九届全国内河船舶及航运技术学术交流会论文集》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108019267A (en) * | 2017-11-17 | 2018-05-11 | 无锡开普动力有限公司 | Large bore engine modular exhaust gas manifold structure |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130213 |