CN1033711C - Multi-pulse constant-pressure exhausting pipe for gasoline engine of automobile - Google Patents
Multi-pulse constant-pressure exhausting pipe for gasoline engine of automobile Download PDFInfo
- Publication number
- CN1033711C CN1033711C CN 93104944 CN93104944A CN1033711C CN 1033711 C CN1033711 C CN 1033711C CN 93104944 CN93104944 CN 93104944 CN 93104944 A CN93104944 A CN 93104944A CN 1033711 C CN1033711 C CN 1033711C
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- CN
- China
- Prior art keywords
- pressure
- exhaust
- automobile
- house steward
- gasoline engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
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- Exhaust Silencers (AREA)
- Supercharger (AREA)
Abstract
The present invention relates to a multi-pulse constant-pressure exhaust pipe which is used for a gasoline engine of an automobile and is designed according to an induction principle. The multi-pulse constant-pressure exhaust pipe comprises a plurality of manifolds with reducing area, and the reducing ends of the manifolds are connected together and are communicated with a main pipe. The present invention has the characteristics of low pressure of an exhaust valve at all rotary speeds, simple structure and reliable operation; the same purpose as fluctuation utilization can be achieved without adjustment.
Description
The present invention relates to a kind of petrol engine outlet pipe, particularly a kind of multi-pulse constant-pressure exhausting pipe for gasoline engine of automobile.
At present the structure of the used outlet pipe of automobile gasoline machine is a menifold uniform section formula, does not consider the elimination problem of the phase mutual interference between each cylinder exhaust, let alone utilize a certain cylinder other cylinder of exhaust injection exhaust and reduce, the pressure at outlet valve place.In recent decades, people begin to utilize the pressure surge in the air inlet-outlet pipe when the design air inlet-outlet pipe, but this also only can utilize pipe internal pressure many waste discharges gas that fluctuates to fill new gas near some engine speed more, then can't utilize pressure wave in the pipe at other rotating speed, even effect more bad (SAE pape 690499), in order under various rotating speeds, to utilize pressure surge, someone has invented adjustable suction tude (SAE paper 871977), but this structure more complicated, its purpose remains utilizes pressure surge, and need measure various rotating speeds in advance, even the optimum position under the load.Carry out open loop control with complex control apparatus, this has relatively high expectations to manufacturing and adjustment, and practical is few.U.S. Pat 4165612 and German patent DE 3903-566-A disclose a kind of outlet pipe, and this outlet pipe has at least two manifolds, and these at least two manifolds link together and are communicated with a house steward, though can reduce the pressure at outlet valve place, pressure is still bigger than normal.
The objective of the invention is to overcome the shortcoming of above-mentioned prior art, utilize injection principle to design a kind of multi-pulse constant-pressure formula outlet pipe, have that under each rotating speed outlet valve place pressure is low, simple in structure, reliable operation, need not adjust the characteristics that just can reach and utilize the identical purpose of fluctuation.
Structural principle of the present invention is achieved in that
It is tapering type that gas exhaust manifold is designed to area, and at least two manifolds are connected together be configured to house steward, with the exhaust pulses injection that utilizes each cylinder with make house steward's pressure stability.The length of manifold will relatively be lacked unsuitable longly in addition, and the visual requirement of house steward is designed to area flaring, convergent and area invariant.
The working principle of this outlet pipe is, when a certain cylinder exhaust, utilize the sectional area variation of manifold that air-flow is quickened, gas in other manifold is produced injection, reduce the back pressure at outlet valve place, again since each cylinder regularly constantly exhaust make each cylinder outlet valve place that lower exhaust back pressure be arranged always, and make that gas pressure is more stable among the house steward.In addition because the ejector action of the area change in house steward and the manifold and each cylinder gas makes that the gas among the house steward is little to the manifold influence.
This shows that the present invention can make motor benzine machine (supercharging and naturally aspirated) at each cylinder outlet valve place low exhaust back pressure be arranged always, exhaust manifold has than pressure stable and the exhaust of avoiding house steward's pressure influence gas exhaust manifold.For supercharging gasoline engine, exhaust is arranged only, helps filling new gas more, and power is improved, and fuel economy improves, and the pressure stability of exhaust manifold can be worked on stability and high efficiency ground exhaust gas turbine, has made full use of exhaust energy; For the naturally aspirated petrol engine, exhaust is arranged totally, and it is many to fill new gas, and the power moment of torsion improves, and Economy improves, and exhaust manifold pressure is more stable, helps reducing exhaust sound.
Accompanying drawing is a six-cylinder gasoline engine exhaust pipe structure schematic representation in upright arrangement.
With reference to accompanying drawing, the present invention includes at least two manifolds (1-6), the area of manifold (1-6) is a gradual shrinkage, and the tapered end of manifold (1-6) connects together and is connected with a house steward (7), and house steward (7) is the area invariant.
Equally, house steward (7) can be designed to the area gradually expansion type, area is tapering type.
Accompanying drawing embodiment's exhaust is 1-5-3-6-2-4 in proper order, 720 ° of crank angle circulation primary, and per 120 ° of crank angles have a cylinder exhaust.During exhaust, outlet valve is opened to maximum gradually, closes gradually again then, and when front one cylinder was vented to 120 °, the cylinder of back exhaust began exhaust, and every cylinder exhaust duration is approximately 240 ° of crank angles.So basically, make the pressure stability of exhaust manifold.Owing to the area convergent of each manifold, gas quickens when making this cylinder exhaust again, and all other cylinders are produced injection, and each cylinder outlet valve place pressure is lower as a result, helps draining waste gas.
This outlet pipe is used for multi-cylinder engine.As four-in-line formula petrol engine and six-in-line formula petrol engine.Remarkable to improving engine power reduction fuel consumption effect.For example, a certain naturally aspirated four-in-line petrol engine 492Q (is used in a large number in China, annual output reaches more than 400,000) preliminary test show, peak output and moment of torsion have improved more than 8%, the external characteristics specific fuel consumption descends more than 5%, and the speed range that works is 1500 rev/mins to 4000 rev/mins.
Since 1988, adopt the test (carrying out exhaust gas turbocharge test) of this outlet pipe to show as the 492Q naturally aspirated petrol engine tracheae that only changes gear, engine power is raised to 105 horsepowers from 83 horsepowers, the minimum specific fuel consumption of mapping characteristics descended 10 grams/horsepower-hour about.
Claims (4)
1, multi-pulse constant-pressure exhausting pipe for gasoline engine of automobile is made up of at least two manifolds, and the tapered end of at least two manifolds connects together and is connected with a house steward, it is characterized in that, the area of manifold is a gradual shrinkage.
2, outlet pipe according to claim 1 is characterized in that, said house steward is the area invariant.
3, outlet pipe according to claim 1 is characterized in that, said house steward is the area gradually expansion type.
4, outlet pipe according to claim 1 is characterized in that, said house steward is that area is tapering type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104944 CN1033711C (en) | 1993-05-03 | 1993-05-03 | Multi-pulse constant-pressure exhausting pipe for gasoline engine of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93104944 CN1033711C (en) | 1993-05-03 | 1993-05-03 | Multi-pulse constant-pressure exhausting pipe for gasoline engine of automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1094786A CN1094786A (en) | 1994-11-09 |
| CN1033711C true CN1033711C (en) | 1997-01-01 |
Family
ID=4985476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93104944 Expired - Fee Related CN1033711C (en) | 1993-05-03 | 1993-05-03 | Multi-pulse constant-pressure exhausting pipe for gasoline engine of automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033711C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017136426A1 (en) * | 2016-02-05 | 2017-08-10 | Cummins Inc. | Systems and methods for equalizing backpressure in engine cylinders |
| CN105697134B (en) * | 2016-02-29 | 2018-05-22 | 昆明云内动力股份有限公司 | Combustion gas use for diesel engine pulse type gas exhausting turbo charge system |
| CN106762194A (en) * | 2017-01-24 | 2017-05-31 | 李斯特技术中心（上海）有限公司 | A kind of exhaust passage of naturally aspirated engine |
-
1993
- 1993-05-03 CN CN 93104944 patent/CN1033711C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1094786A (en) | 1994-11-09 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |