CN201588714U - Air feeding and exhaust system of internal combustion engine - Google Patents
Air feeding and exhaust system of internal combustion engine Download PDFInfo
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- CN201588714U CN201588714U CN2009202158283U CN200920215828U CN201588714U CN 201588714 U CN201588714 U CN 201588714U CN 2009202158283 U CN2009202158283 U CN 2009202158283U CN 200920215828 U CN200920215828 U CN 200920215828U CN 201588714 U CN201588714 U CN 201588714U
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Abstract
The utility model discloses an air feeding and exhaust system of an internal combustion engine, which comprises a feeding pipe and an exhaust pipe, and either the feeding pipe or the exhaust pipe is provided with a reflection pipe. By arranging the pressure wave reflection pipe on the air feeding and exhaust pipe system of the internal combustion engine, the air feeding and exhaust system of the internal combustion engine has pressure wave regulation function, so that the air feeding and exhaust pressure wave of the internal combustion engine can be controlled, and the performance indexes of heat radiation, economical efficiency, discharge, and so on of the internal combustion engine are improved.
Description
Technical field
The utility model relates to a kind of internal-combustion engine, is specifically related to a kind of internal combustion (IC) engine air-inlet-exhaust system.
Background technique
Internal combustion engine air-exhausting air-entering piping and engine performance index are in close relations, are the important research direction of internal-combustion engine technology.All must consider the pressure surge in the pipeline when the intake and exhaust piping designs, whether reasonably the relevant parameter of pipeline inner pressure ripple is circuit design important indicator, also directly affects the performance index of motor.
For induction system of internal combustion engine, to wish to close constantly at suction valve, the pressure of air inlet valve position is in crest location, can obtain bigger air inlet charge like this, helps the improvement of the tissue and the engine performance of combustion process.Intake pressure wave is regulated main passing through when the air inlet piping designs at present, and the length of choose reasonable air intake branch realizes.The effect length pressure wave of air intake branch arrives the moment of air inlet valve position, and then influence is closed the phase place of pressure crest constantly at suction valve.But because the restriction of bulk, air intake branch often is difficult to choose ideal length.
For internal combustion engine exhaust system, the scavenging period that hope is opened simultaneously at air inlet and exhaust valve, exhaust pressure wave is in wave trough position, and air inlet-outlet pipe has bigger pressure reduction like this, can realize good scavenging.The quality of internal-combustion engine scavenging process has remarkable influence to performance, but because exhaust pipe volume is generally less, the exhaust flow velocity is very fast, fluctuating range is bigger, is very easy to form the interference of exhaust pressure wave between each cylinder.It is the major influence factors of scavenge effect that scavenging is disturbed.The major measure that control exhaust is at present disturbed is for to isolate pressure wave by convergent nozzle.Internal combustion engine exhaust system has MPC, three pulses, pulses switch, multiple pulse, level pressure system etc., and wherein MPC is the high-power supercharged diesel engine of a high speed vent systems the most commonly used, and this system has promptly adopted the measure that weakens pressure wave by convergent nozzle.The MPC system designs a convergent nozzle on every cylinder arm, each cylinder exhaust is flowed out in the same exhaust manifold.Convergent nozzle can weaken pressure wave to a certain extent from the propagation of house steward to arm.
As Fig. 1, Figure 3 shows that the MPC exhaust piping that the high-power supercharged diesel engine of present high speed is the most frequently used, comprise a plurality of cylinders 2, each cylinder 2 is communicated with exhaust manifold 10 by exhaust branch pipe 20 respectively, and turbosupercharger 3 is set on the exhaust manifold 10.
By the measure that convergent nozzle comes the isolated pressure ripple, can not avoid the interference of each cylinder pressure wave of pressure fully, the MPC outlet pipe often exists row's temperature inhomogeneous, the higher problem of individual cylinder row temperature.
The model utility content
Technical problem to be solved in the utility model provides a kind of internal combustion (IC) engine air-inlet-exhaust system, and it can be optimized the intake and exhaust pressure waveform, improves ventilation quality, and then improves engine performance.
For solving the problems of the technologies described above, the technical solution of the utility model internal combustion (IC) engine air-inlet-exhaust system is:
Comprise suction tude, outlet pipe, described suction tude and/or outlet pipe are provided with reflection tube.
Further, the utility model internal combustion (IC) engine air-inlet-exhaust system, comprise exhaust manifold, exhaust branch pipe, intake manifold, air intake branch, a plurality of cylinders are communicated with exhaust manifold by exhaust branch pipe respectively, a plurality of cylinders are communicated with the intake manifold by air intake branch respectively, and described exhaust manifold and/or exhaust branch pipe are provided with the pressure wave reflection pipe.
The internal diameter of described exhaust manifold is 125mm, and the internal diameter of exhaust branch pipe is 75mm, and the internal diameter of pressure wave reflection pipe is 45mm, long 155mm.
Further, the utility model internal combustion (IC) engine air-inlet-exhaust system, comprise exhaust manifold, exhaust branch pipe, intake manifold, air intake branch, a plurality of cylinders are communicated with exhaust manifold by exhaust branch pipe respectively, a plurality of cylinders are communicated with the intake manifold by air intake branch respectively, and described intake manifold and/or air intake branch are provided with the pressure wave reflection pipe.
The technique effect that the utility model can reach is:
The utility model is provided with the pressure wave reflection pipe by fastening at the air inlet-outlet pipe of internal-combustion engine, make internal combustion (IC) engine air-inlet-exhaust system have the regulatory function of pressure wave, can control the internal combustion engine air-exhausting air-entering pressure wave, improve performance index such as internal-combustion engine row temperature, Economy, discharging.
The utility model internal combustion (IC) engine air-inlet-exhaust system is based on pressure wave reflection, superposition theory, by increasing reflection tube, in the intake and exhaust piping, introduce one tunnel new pressure wave, utilize the pressure wave reflection, and it is superimposed with original pressure wave, thereby change the shape of former pressure wave in the intake and exhaust pipeline, optimize the pressure wave in the intake and exhaust pipeline, make it satisfy the requirement of internal combustion engine process organization.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 is the schematic representation of the MPC exhaust piping of prior art supercharged diesel engine;
Fig. 2 is the schematic representation that the utility model internal combustion (IC) engine air-inlet-exhaust system is used for the MPC exhaust piping of supercharged diesel engine;
Fig. 3 is the structural drawing of the MPC exhaust piping of prior art supercharged diesel engine;
Fig. 4 is the schematic representation that the utility model is used for the MPC exhaust piping of supercharged diesel engine.
Description of reference numerals among the figure:
1 is the pressure wave reflection pipe, and 10 is exhaust manifold,
20 is exhaust branch pipe, and 2 is cylinder,
3 is turbosupercharger.
Embodiment
The utility model internal combustion (IC) engine air-inlet-exhaust system comprises suction tude, outlet pipe, and suction tude and/or outlet pipe are respectively equipped with reflection tube.
Because the pressure wave in the internal combustion engine air-exhausting air-entering piping is the result that exhaust pressure repeatedly reflects in piping, superposes, the utility model is fastened at the air inlet-outlet pipe of internal-combustion engine and is provided with reflection tube, reflection tube can reflect the pressure wave in the internal combustion engine air-exhausting air-entering piping, the variation that finally brings pressure waveform.By number, size, the position of rationally choosing reflection tube, realize optimization to pressure waveform.
The utility model is provided with reflection tube on gas handling system, can regulate the suction pressure waveform, makes to close constantly at suction valve, is in crest location at the intake pressure wave of air inlet valve position, increases the FAI Fresh Air Intake amount, improves combustion efficiency.
The utility model is provided with reflection tube on vent systems, can change in scavenging period I. C. engine exhaust pressure wave shape, improves the scavenging flow, reduces coefficient of residual gas, reaches the purpose that reduces delivery temperature, reduces fuel consumption rate and discharging.
As Fig. 2, shown in Figure 4, the utility model internal combustion (IC) engine air-inlet-exhaust system comprises a plurality of cylinders 2, and each cylinder 2 is communicated with exhaust manifold 10 by exhaust branch pipe 20 respectively, is respectively equipped with pressure wave reflection pipe 1 on exhaust manifold 10 and the exhaust branch pipe 20.
As shown in Figure 4, according to the needs that pressure wave is regulated, can only establish pressure wave reflection pipe 1 at exhaust manifold 10.The internal diameter of exhaust manifold 10 is 125mm, and the internal diameter of exhaust branch pipe 20 is 75mm, and the internal diameter of pressure wave reflection pipe 1 is 45mm, long 155mm.Present embodiment has only increased a reflection tube, if increase the reflection tube number, to the further raising of adjustment capability of pressure wave, the diesel engine performance parameter can also will have further improvement.
Also can only on exhaust branch pipe 20, establish pressure wave reflection pipe 1.
The utility model has additional pressure wave reflection pipe 1 on exhaust manifold 10 and/or exhaust branch pipe 20, can reduce the interference between each cylinder 2, optimizes the internal-combustion engine machine performance.
The utility model is used for the internal-combustion engine complete machine, can improve coefficient of scavenging when keeping the high energy transfer efficiency of MPC piping, reduces the cylinder delivery temperature, thereby reduces oil consumption.
The shape of pressure wave can be optimized in the size of choose reasonable reflection tube and position, improves coefficient of scavenging, and row's temperature also has remarkable reduction.
The utility model internal combustion (IC) engine air-inlet-exhaust system comprises a plurality of cylinders 2, and each cylinder 2 is communicated with the intake manifold by air intake branch respectively, is respectively equipped with the pressure wave reflection pipe on intake manifold and/or the air intake branch.
The principle that gas handling system is provided with reflection tube is identical with vent systems.
Claims (4)
1. an internal combustion (IC) engine air-inlet-exhaust system comprises suction tude, outlet pipe, it is characterized in that: described suction tude and/or outlet pipe are provided with reflection tube.
2. internal combustion (IC) engine air-inlet-exhaust system, comprise exhaust manifold, exhaust branch pipe, intake manifold, air intake branch, a plurality of cylinders are communicated with exhaust manifold by exhaust branch pipe respectively, a plurality of cylinders are communicated with the intake manifold by air intake branch respectively, it is characterized in that: described exhaust manifold and/or exhaust branch pipe are provided with the pressure wave reflection pipe.
3. internal combustion (IC) engine air-inlet-exhaust system according to claim 2 is characterized in that: the internal diameter of described exhaust manifold is 125mm, and the internal diameter of exhaust branch pipe is 75mm, and the internal diameter of pressure wave reflection pipe is 45mm, long 155mm.
4. internal combustion (IC) engine air-inlet-exhaust system, comprise exhaust manifold, exhaust branch pipe, intake manifold, air intake branch, a plurality of cylinders are communicated with exhaust manifold by exhaust branch pipe respectively, a plurality of cylinders are communicated with the intake manifold by air intake branch respectively, it is characterized in that: described intake manifold and/or air intake branch are provided with the pressure wave reflection pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202158283U CN201588714U (en) | 2009-12-31 | 2009-12-31 | Air feeding and exhaust system of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202158283U CN201588714U (en) | 2009-12-31 | 2009-12-31 | Air feeding and exhaust system of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201588714U true CN201588714U (en) | 2010-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202158283U Expired - Fee Related CN201588714U (en) | 2009-12-31 | 2009-12-31 | Air feeding and exhaust system of internal combustion engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN201588714U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519668A (en) * | 2011-10-27 | 2012-06-27 | 上海交通大学 | Pressure loss measuring device of three-way joint of exhaust piping |
| CN109252957A (en) * | 2018-09-27 | 2019-01-22 | 潍柴重机股份有限公司 | Cylinder based on delivery temperature deviation overhauls reminding method |
| CN109540527A (en) * | 2018-10-30 | 2019-03-29 | 中国北方发动机研究所(天津) | A kind of intake and exhaust pressure wave simulator |
-
2009
- 2009-12-31 CN CN2009202158283U patent/CN201588714U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519668A (en) * | 2011-10-27 | 2012-06-27 | 上海交通大学 | Pressure loss measuring device of three-way joint of exhaust piping |
| CN109252957A (en) * | 2018-09-27 | 2019-01-22 | 潍柴重机股份有限公司 | Cylinder based on delivery temperature deviation overhauls reminding method |
| CN109252957B (en) * | 2018-09-27 | 2020-11-20 | 潍柴重机股份有限公司 | Cylinder maintenance prompting method based on exhaust temperature deviation |
| CN109540527A (en) * | 2018-10-30 | 2019-03-29 | 中国北方发动机研究所(天津) | A kind of intake and exhaust pressure wave simulator |
| CN109540527B (en) * | 2018-10-30 | 2021-01-08 | 中国北方发动机研究所(天津) | Air inlet and outlet pressure wave simulation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20161231 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |