CN1415846A - Two-stroke diesel engine with air escape valve type of pressure charging and crossflow scavenging - Google Patents
Two-stroke diesel engine with air escape valve type of pressure charging and crossflow scavenging Download PDFInfo
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- CN1415846A CN1415846A CN02140885A CN02140885A CN1415846A CN 1415846 A CN1415846 A CN 1415846A CN 02140885 A CN02140885 A CN 02140885A CN 02140885 A CN02140885 A CN 02140885A CN 1415846 A CN1415846 A CN 1415846A
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- scavenging
- diesel engine
- dead center
- exhaust
- bottom dead
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
This invention supercharge transverse current, scavenge and two-stroke diesel has exhaust turbine charging system and exhaust valve. When piston arrives at 70 deg. before lower dead point, an air vent opens to begin exhausting, when at 45 deg. before the scavenge port opens, compressed air from the compressor enters into the cylinder to scavenge immediately with pressure higher than that of the waste air in cylinder, when at 10 deg. behind, the exhaust valve close so does the air vent, and pressure in the cylinder is increased by the compressed air.
Description
There is the file of reference role to mainly contain to examination: the content of Anhui science tech publishing house " motor car engine principle " chapter 5, chapter 7, chapter 8.The content of sequence number 12 in " an Automobile Engineering Manual motorcycle piece of writing " table 3-2-18.The content of publishing house of the National University of Defense technology " Modern Ships Marine Engine Engineering " chapter 2 first segment.
One, basic structure and principle
1, basic structure:
The outlet valve formula two stroke diesel engine of this supercharging cross flow scavenging not only has blowdown turbocharging system, takes the scavenging way of pressure scavenging.And have outlet valve, relief opening is closed prior to scavenging port.
The relief opening of cylinder and scavenging port coexist the piston lower dead center on one side.Relief opening Before Bottom Dead Center 70 ° open, and after lower dead center about 10 °, closing and close with outlet valve; Scavenging port then Before Bottom Dead Center 45 ° open, and on down after the point 45 ° close.
2, principle summary:
When diesel engine ran well, exhaust steam turbine drove coaxial gas compressor work.
When piston arrives before bottom dead center 70 ° time the, Exhaust Open, exhaust begins.Waste gas enters outlet pipe at a high speed under the pressure of 0.2MPa to 0.5MPa, and continues to flow to exhaust steam turbine with fast speeds in outlet pipe.
Along with the discharge of waste gas, the pressure in the cylinder descends rapidly.When piston arrives before bottom dead center 45 ° the time, scavenging port is opened, and the pressurized air from gas compressor comes just enters cylinder scavenging at once with the pressure that is higher than waste gas in the cylinder.Waste gas just successfully enters outlet pipe from the relief opening of opening with after pressurized air mixes.
When piston arrives after bottom dead center about 10 °, exhaust valve closure is therefore just with exhaust close.
Because relief opening is closed,, the pressure in the cylinder is raise so continue to enter the pressurized air of cylinder.When 45 ° when closing scavenging port after bottom dead center of piston arrives, the pressure in the cylinder will be in: compressor delivery pressure＞inner pressure of air cylinder＞barometric pressure.Therefore this has just played the effect of super charge.
Because relief opening is being closed about 10 ° after bottom dead center prior to scavenging port, therefore when piston at 45 ° when closing scavenging port after bottom dead center, from then on compression stroke just begins.
Approaching at the end when compression stroke, injection system sprays vaporific diesel oil in cylinder, thereby makes the diesel engine work done.
When piston through top dead center, arrive about 60 ° of atdc, outlet valve is opened, for exhaust is once more prepared.
Two, the starting of diesel engine
After opening switch starter, a motor drives bent axle rotates, another motor drives blowdown turbocharging system work.Like this, because gas compressor has the scavenging of pressurized air output air feed cylinder, so diesel engine just can successfully start.
Three, with the comparison of existing two stroke diesel engine
The outlet valve formula two stroke diesel engine of this supercharging cross flow scavenging is compared with the uniflow scavenged two stroke diesel engine of existing supercharging, and the advantage or the good effect that have have:
1, because existing supercharging uniflow scavenging two stroke diesel engine, Exhaust valve mechanism is housed on the cylinder head, transmission device complexity has not only also increased the height of motor simultaneously.
And the outlet valve formula two stroke diesel engine of this supercharging cross flow scavenging, adopt a kind of simple in structure, the outlet valve that volume is very little, the valve body of outlet valve and cylinder block are that same casting is whole, the suction port of outlet valve is the relief opening of cylinder.Because the position of outlet valve is very near apart from bent axle, and therefore the transmission device of outlet valve can not increase the height of motor all in crankcase.
2, the two stroke diesel engine of this cross flow scavenging, when beginning owing to exhaust, outlet valve is in full-gear, and is therefore very little to the resistance of exhaust.Add the upward pressure scavenging, fully scavenging.So only establish scavenging port, and both sides do not have scavenging port, so the arrangement of multi-cylinder is just the same with four stroke engine compact at the relief opening offside.
And existing uniflow scavenging two stroke diesel engine, because the exhaust valve on the cylinder head, at the exhaust initial stage discharge of waste gas had certain resistance, in order to guarantee the uniflow scavenging effect, scavenging port need be provided with all around around cylinder, so this just makes that the arrangement of multi-cylinder is comparatively complicated.
Because the height of the outlet valve formula two stroke diesel engine of supercharging cross flow scavenging, more much lower than existing supercharging uniflow scavenging two stroke diesel engine, and the arrangement of multi-cylinder is also the same with four stroke engine compact, has therefore just satisfied the basic demand to the motor miniaturization and.So it not only can be used for steamer, and can be used for automobile.
Four, the approach of Shi Xianing
Only need the ventilation mechanism of existing supercharging uniflow scavenging two stroke diesel engine is simplified, just can produce the outlet valve formula two stroke diesel engine of this supercharging cross flow scavenging with the equipment of production supercharging uniflow scavenging two stroke diesel engine.
Perhaps will have the supercharging type four-cycle diesel now and be simplified, also can produce with the equipment of production supercharging type four-cycle diesel.And this is the best way that the outlet valve formula two stroke diesel engine of this supercharging cross flow scavenging is used for automobile.
Five, description of drawings
Accompanying drawing is a schematic representation.
Claims (1)
- For the outlet valve formula two stroke diesel engine of supercharging cross flow scavenging, this patent of invention needs the scope of request patent protection to be:The basic structure and the principle of the outlet valve formula two stroke diesel engine of supercharging cross flow scavenging.Basic structure is:The outlet valve formula two stroke diesel engine of supercharging cross flow scavenging has blowdown turbocharging system, has outlet valve.Relief opening Before Bottom Dead Center 70 ° open.Scavenging port Before Bottom Dead Center 45 ° open.Basic principle is:Piston arrives is before bottom dead center 70 ° the time, Exhaust Open, and exhaust begins.45 ° time, open before bottom dead center by scavenging port for piston arrives, and pressurized air enters cylinder scavenging.About 10 °, exhaust valve closure is therefore with exhaust close after bottom dead center for piston arrives.Because relief opening is closed, and continues to enter the pressurized air of cylinder, the pressure in the cylinder is raise, play the effect of super charge therefrom.45 ° time, close after bottom dead center by scavenging port for piston arrives, and compression stroke begins.Compression stroke is near at the end, and the injection system oil spout makes the diesel engine work done.About 60 ° of piston arrives atdc, outlet valve is opened, for exhaust is once more prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02140885A CN1415846A (en) | 2002-07-08 | 2002-07-08 | Two-stroke diesel engine with air escape valve type of pressure charging and crossflow scavenging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02140885A CN1415846A (en) | 2002-07-08 | 2002-07-08 | Two-stroke diesel engine with air escape valve type of pressure charging and crossflow scavenging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1415846A true CN1415846A (en) | 2003-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02140885A Pending CN1415846A (en) | 2002-07-08 | 2002-07-08 | Two-stroke diesel engine with air escape valve type of pressure charging and crossflow scavenging |
Country Status (1)
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| CN (1) | CN1415846A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269058A (en) * | 2006-08-18 | 2011-12-07 | 株式会社Joho | 6-cycle engine with regenerator |
| CN109162821A (en) * | 2018-10-29 | 2019-01-08 | 宁波吉利罗佑发动机零部件有限公司 | The control method of cylinder, two stroke engine and its working cycles |
| CN113513402A (en) * | 2021-04-28 | 2021-10-19 | 广西玉柴机器股份有限公司 | Novel two-stroke multi-cylinder diesel engine scavenging device |
-
2002
- 2002-07-08 CN CN02140885A patent/CN1415846A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269058A (en) * | 2006-08-18 | 2011-12-07 | 株式会社Joho | 6-cycle engine with regenerator |
| CN109162821A (en) * | 2018-10-29 | 2019-01-08 | 宁波吉利罗佑发动机零部件有限公司 | The control method of cylinder, two stroke engine and its working cycles |
| CN113513402A (en) * | 2021-04-28 | 2021-10-19 | 广西玉柴机器股份有限公司 | Novel two-stroke multi-cylinder diesel engine scavenging device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |