CN103225524A - Large two-stroke engine, inlet valve and cylinder liner - Google Patents
Large two-stroke engine, inlet valve and cylinder liner Download PDFInfo
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- CN103225524A CN103225524A CN2013100348918A CN201310034891A CN103225524A CN 103225524 A CN103225524 A CN 103225524A CN 2013100348918 A CN2013100348918 A CN 2013100348918A CN 201310034891 A CN201310034891 A CN 201310034891A CN 103225524 A CN103225524 A CN 103225524A
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- suction port
- cylinder
- intake valve
- single suction
- valve body
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- 238000000926 separation method Methods 0.000 claims description 17
- 244000273256 Phragmites communis Species 0.000 claims description 14
- 241000196324 Embryophyta Species 0.000 claims description 12
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 3
- 229910001018 Cast iron Inorganic materials 0.000 claims description 2
- 229910001060 Gray iron Inorganic materials 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 230000004308 accommodation Effects 0.000 claims 1
- 238000010304 firing Methods 0.000 description 27
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
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- 230000008569 process Effects 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 210000000245 forearm Anatomy 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/36—Valve-gear or valve arrangements, e.g. lift-valve gear peculiar to machines or engines of specific type other than four-stroke cycle
- F01L1/38—Valve-gear or valve arrangements, e.g. lift-valve gear peculiar to machines or engines of specific type other than four-stroke cycle for engines with other than four-stroke cycle, e.g. with two-stroke cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/36—Valve-gear or valve arrangements, e.g. lift-valve gear peculiar to machines or engines of specific type other than four-stroke cycle
- F01L1/42—Valve-gear or valve arrangements, e.g. lift-valve gear peculiar to machines or engines of specific type other than four-stroke cycle for machines or engines characterised by cylinder arrangements, e.g. star or fan
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- 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
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
- F02B25/04—Engines having ports both in cylinder head and in cylinder wall near bottom of piston stroke
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- 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
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
- F02B25/24—Inlet or outlet openings being timed asymmetrically relative to bottom dead-centre
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- 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
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
- F02B33/28—Component parts, details or accessories of crankcase pumps, not provided for in, or of interest apart from, subgroups F02B33/02 - F02B33/26
- F02B33/30—Control of inlet or outlet ports
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/02—Cylinders; Cylinder heads having cooling means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/14—Check valves with flexible valve members
- F16K15/16—Check valves with flexible valve members with tongue-shaped laminae
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Check Valves (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention is related to an inlet valve for an large two-stroke uniflow engine. The inlet valve is designed for locking and opening a gas flow passage leading through one individual inlet sut of a ring of inlet slits, wherein said valve body is mountable at said individual inlet sut from outside of a cylinder and is formed as a sealing for said individual inlet sut. A number of movable valve elements are arranged and dimensioned to open and close said number of gas passages, and said inlet valve is dimensioned and said valve body is mountable such that inlet slits of said ring of inlet slits neighboring said ind ividual inlet sut can also be provided with identical inlet valves. Said valve body at least basically includes a received part which is formed to be received in the individual inlet sut to at least partially fill the individual inlet sut. The invention is also related to a related cylinder liner and an engine having the inlet valve and the cylinder liner.
Description
Technical field
The present invention relates to the large-sized two-stroke uniflow engine, especially according to the two stroke diesel engine of the single current as described in the preamble of claim 15.The invention still further relates to according to the intake valve as described in the preamble of claim 1 with according to the cylinder liner as described in the preamble of claim 13, described intake valve and cylinder liner are used for this large-sized two-stroke motor, especially large two-stroke diesel engine.
Background technique
The large-sized two-stroke motor of general type has at least one cylinder, this cylinder has cylinder wall, wherein said cylinder wall is penetrated by at least one air inlet choma, and described suction port passes described cylinder wall so that the volume of cylinder of the piston top of described motor in the scavenging air belt of described motor and the described cylinder is coupled together.
In this uniflow engine, the outlet that is typically provided with exhaust valve on the cylinder tip side of described suction port circulation the cylinder perisporium of gas on one side of firing chamber to the opposite side of described firing chamber, that is, always flow, therefore be called as uniflow engine along equidirectional.
Ring by air inlet port of opening in the cylinder liner or suction port couples together firing chamber and motor scavenging air belt, when dropping to the pressure that is lower than in the scavenging air belt during the expansion stroke of pressure in the firing chamber after the air inlet choma that has passed through on its downward path at piston in the cylinder wall, with the scavenging of the chamber that takes fire at piston.
If piston, the piston ring group of perhaps more specifically saying so, air inlet choma that process is opened in expansion stroke and the pressure in the firing chamber are higher than the pressure in the scavenging air belt, and then gas will be back in the scavenging air belt, and the loss of undesirable available energy therefore occurs.And, just at piston through suction port and before beginning to expose suction port, opening constantly under the 6-10 bar pressure in the firing chamber for example, exhaust valve is opened in expansion stroke, the gas that flows out in the air outlet flue will reduce overvoltage, and this is crossed pressure energy and does work on expansion stroke axis piston.
Therefore, wish to postpone opening of in expansion stroke suction port and exhaust valve, so as in air inlet open use scavenging, for example fresh air carries out the expansion stroke that scavenging prolongs piston before to the firing chamber.Yet, if it is lower so that avoid this undesirable available energy loss that the ring of suction port is formed in the cylinder liner, then work as piston, the piston ring group of perhaps more specifically saying so, when in compression stroke, through the air inlet choma of opening, scavenging finishes during compression stroke earlier, cuts off the gas passageway by suction port thus.
For this reason, use intake valve known in the art is postponed during expansion stroke and being opened, that is, what produce suction port during expansion stroke and compression stroke asymmetricly closes timing.That is to say that the timing retard of closing of suction port surpasses the piston elapsed time during expansion stroke, and during compression stroke suction port close that timing does not postpone and by piston through and finish.
The intake valve that is used for the general type of single current large-sized two-stroke motor is used to lock and open the gas flow channel by the air inlet choma, this air inlet choma by the cylinder of described motor cylinder wall and the volume of cylinder of the piston top of described motor in the scavenging air belt of described motor and the described cylinder coupled together, if the pressure in the described scavenging air belt is lower than the pressure in the described volume of cylinder, then described intake valve locks described gas flow channel, if and the pressure in the described scavenging air belt is higher than the described pressure in the described volume of cylinder, then open described gas flow channel.For this reason, described intake valve comprises the valve body that carries a plurality of moving valve parts.Described valve body can be mounted to described cylinder, so that described moving valve parts are arranged in the described gas flow channel, wherein said moving valve parts are arranged to make it and to return from the closed position of open position motion, open at the described gas flow channel of described open position, close at the described gas flow channel of described closed position.
For example in European patent application EP 1788218AZ, a kind of ring-type intake valve that is installed in the cylinder liner is disclosed, it has valve portion, and this valve portion can open and close suction port and by by the hydraulic driving of electromagnetic valve.
Yet, because the ring-type intake valve is installed in the firing chamber, therefore be difficult to change, and the surface of piston (that is piston ring) wearing and tearing intake valve and the annular groove between intake valve top cylinder jacket wall and the intake valve self.
Therefore, in other examples known in the art, intake valve is installed in outside the cylinder liner.
For example Japanese patent application JP59203820A illustrates a kind of intake valve and arranges that wherein the ring section forms a ring around cylinder liner, so that the opening in the ring section is aimed at the suction port in the cylinder liner.Intake valve has the moving valve parts, promptly is arranged in the cylindric valve plug in the ring section opening rotationally.Two air passagewayss are arranged in valve plug, and described air passageways can optionally have been supplied with forced air, so that make generation turn to closed condition and return from open mode.Seem to be difficult to make engine piston motion and valve plug synchronized movement.Therefore, in other examples, use to have for example intake valve of the passive activity valve member of reed.
Japanese patent application JP59049316A illustrates a kind of motor, and it has two rings of the suction port that passes the cylinder jacket wall.The ring of going up of suction port is connected with suction tude, is provided with one-way valve 11 in the described suction tude.
Japanese patent application JP62129518A discloses a kind of annular intake valve body that surrounds cylinder liner around suction port.Be provided be hinged to annular valve body turning plate valve as safety check, when the pressure in the firing chamber is higher than pressure in the scavenging air belt, this closure of check ring intake valve, and the excessive rolling in scavenging air belt is opened.
Japanese patent application JP62129529A discloses a kind of similar intake valve and has arranged, wherein replace hinged turnover panel, valve reed one end is fixed to valve body, if impacted from the overvoltage in the firing chamber, then described valve reed self can be crooked flexibly, so that make it be compressed against on the valve body bearing surface and inlet close.
Compare with the intake valve in the cylinder liner, above-mentioned intake valve is arranged easier to mount on cylinder liner.Yet if consider the absolute dimension of the air cylinder sleeve of engine diameter of general type, the suction port height is the order of magnitude of adult forearm, and complicated annular element is still and is difficult to make and be installed on the cylinder liner.
Summary of the invention
Therefore, the objective of the invention is large-sized two-stroke motor to general type, especially large two-stroke diesel engine provides cylinder liner and intake valve, can make intake valve and assembled engines economically, realize good engine efficiency and less intake valve spatial requirement simultaneously on the other hand.
About intake valve, this purpose realizes by the feature in the claim 1.About cylinder liner, this purpose realizes by the feature in the claim 13.About motor, this purpose realizes by the feature in the claim 15.
According to the present invention, comprise valve body and comprise that thus the intake valve of maintained moving valve parts is designed for locking and opening the gas flow channel of an independent suction port that passes the air inlet choma.For this reason, described valve body can be installed in described single suction port place, and forms the Sealing that is used for described single suction port, is only penetrated by a plurality of gas channels.The valve member of the activity of intake valve is arranged to and is dimensioned to the described a plurality of gas channels of opening and closing.
And described intake valve be dimensioned to and the valve body of described intake valve can be mounted to and makes the suction port of the described air inlet choma adjacent with described single suction port also can be provided with same intake valve so that make all suction ports of described air inlet choma can both be provided with independently intake valve.
And, described valve body comprises or comprises substantially and is received part, this is received partly to form and is contained at least substantially in the described single suction port, fill described single suction port thus at least in part, and the valve member of described activity is contained at least substantially in the described single suction port.In other words, described intake valve forms and makes the described valve body that it is included and the valve member and the described intake valve of described acquisition be contained in fully or at least in part in the described single suction port as a whole.
Found that, if described valve body forms and is contained in the described single suction port at least substantially under described valve body is assembled in state on the cylinder of described motor and the valve member of described activity is contained in the described single suction port under described intake valve is assembled in state on the cylinder of described motor at least substantially, then engine efficiency can further improve.This is because of IC Intake Valve Closes during the expansion stroke of piston, volume between inside, described firing chamber and each described intake valve of closing in the described suction port will be the quiet volume that reduces the compression in the firing chamber during the expansion stroke of piston, and this is because the gas in the firing chamber escapes in the interior described quiet volume of described suction port to a certain extent.Therefore advantageously reduced the interior described quiet volume of described suction port of described air inlet choma.By the described part that is received, that is, by be contained in the described valve body in the described single suction port and/or be contained in described activity in the described single suction port valve member, described single suction port is partially filled at least, has reduced described quiet volume thus.
Because described valve body holds at least substantially as a whole and maybe can be contained in the corresponding suction port, and,, intake valve can be contained in the corresponding suction port so holding maybe as a whole at least substantially because the valve member of described activity is contained in the described single suction port at least substantially.Because described intake valve is contained in the described suction port at least substantially, so in the needed space of the described intake valve of the peripheral of cylinder minimum.Advantageously, described motor is on the whole can be compact, and other assemblies except intake valve can be done greatly and thereby can more efficient or cheap.Consider that the spatial requirement of air inlet choma radial outside reduces, therefore advantageously described valve body is made of the described part that is received.
Large-sized DC formula two stroke engine according to the present invention has at least one cylinder, and this cylinder has cylinder wall, and this cylinder wall can partly be formed by cylinder liner.At least one air inlet choma that described cylinder wall is passed described cylinder wall penetrates.Each independent suction port of described air inlet choma all is provided with according to an intake valve independently of the present invention.
Compare with known ring type and therefore bigger intake valve, especially because the shape of described intake valve and form are definite by the size and dimension of suction port on size and dimension, the microscler cross section of described suction port is greatly about the magnitude of adult's forearm, therefore intake valve of the present invention is easier to mount to cylinder, each cylinder jacket wall.And, be very easy to make, for example cast valve body.Each suction port for the described air inlet choma of the described cylinder of each cylinder liner all is provided with independently intake valve also advantageously aspect safeguarding, this is not only because change the intake valve of reduced size easily, but also can only change defective specific intake valve.
Should be understood that if intake valve can be installed from the described cylinder outside, then also help installation and maintenance easily.And for the present invention, statement " described valve body is penetrated by a plurality of gas channels " means that not only valve body seals all described gas channels fully.Can also be that valve body only forms part and surrounds one or more described gas channels, and other parts be surrounded by the inner circle wall of described suction port.And for the present invention, the valve member that statement " described valve body keeps the valve member of described a plurality of activities " is not limited to described activity is fixed to described valve body.The valve member of described activity also can be clamped between the inner circle wall of described valve body and corresponding suction port, and is kept by described valve body thus.
In other favourable modification, the described intake valve of each of described motor all forms and is mounted under the state that makes in being assembled in described single suction port, its internal surface is formed for the border of indoor gas towards corresponding suction port of burning in off position down, and be exposed to the gas in the firing chamber, that is, face the surface of inboard, firing chamber in suction port.Preferably, the described inner surface of the intake valve of closing is formed by the valve member of described activity at least in part, so that do not have quiet volume in the firing chamber of the valve member of described activity in the face of on the side.
In this respect, described a plurality of valve member of seeing can become a plurality of reeds or reed blade by favorable terrain, each spring leaf is flat and flexible, and therefore can easily form the part of this internal surface, under its closed condition, be formed for burning indoor gas, and be exposed to the gas in the firing chamber towards the border of corresponding suction port.This reed blade can be arranged in the corresponding suction port fully, and can form the part of the described inner surface of the intake valve of closing.Yet should be understood that reed necessarily can not bend in the volume of firing chamber.Though preferably use the valve member of one or more activities of reed blade shape, also can consider to use the valve member of the passive workpiece of other types, for example hinged thin slice as activity.In this connection, " work passively " and mean that corresponding valve member is only by pressure in the firing chamber and the pressure difference actuating between the pressure in the scavenging air belt.Thus, can avoid being used for the outside ACTIVE CONTROL of described intake valve, this outside ACTIVE CONTROL is expensive and is difficult to synchronously timing to motor.In another modification, the valve member of described a plurality of activities or preferably the reed blade can remain on the described part place that is received.
Valve body need be installed on the cylinder at corresponding independent suction port place.Therefore, can consider that valve body is forced to be received part with it and enters into described independent suction port, and remain there by chucking power.Valve body can only be made of the described part that is received.
Yet, be difficult to install reliably or change intake valve with this valve body.Therefore, can have at least one air inlet choma according to cylinder liner of the present invention or cylinder, each suction port of wherein said air inlet choma all is formed for single independent intake valve, and is provided with the erecting device that is used for described intake valve at each suction port place of described air inlet choma.
Yet the piston ring land part between the described suction port in the described air inlet choma should be narrow as far as possible, so that make the size maximum by whole air-flow paths of suction port.When intake valve was contained in the suction port, the size of the whole air-flow paths by suction port was defined.
In order " only to be received " preferred installation in the mode that can engage easily and discharge at the valve body at corresponding suction port place, the engagement grooves of the preferably convergent of the transverse part office of perimeter surface is used to form the engagement convex portion on the valve body of each described intake valve in the described erecting device of the cylinder at each independent suction port place or cylinder liner can be included in the outer surface edge of described cylinder liner perisporium and described single suction port described.Each intake valve can comprise the engagement convex portion of stretching out by its outermost cross section annex that is received part then on two cross sides, joining in the described engagement grooves at described independent suction port place, wherein said engagement convex portion preferably convergent with in the groove that joins convergent preferably to.
The erecting device of cylinder or cylinder liner can also be included in the tapped hole in the piston ring land part of each plant between per two adjacent intake valves of described air inlet choma, owing to require the piston ring land part of plant narrower, described tapped hole preferably is arranged to single tapped hole, and each all extends to described tapped hole in the material of cylinder wall.Thereby can mounting rod be fixed on the piston ring land part of each plant between two adjacent intake valves of described air inlet knocker by screw, described screw thread is screwed in the described tapped hole in the piston ring land part of described plant.Described mounting rod can be given prominence on the lateral surfaces of described insertion slot ridge part, and can be pressed on two adjacent intake valves in two adjacent suction ports of described air inlet choma.Perhaps, screw head can be given prominence on the lateral surfaces of described insertion slot ridge part, and can be pressed on two adjacent intake valves in two adjacent suction ports of described air inlet choma.
Be received the shape and size of part or its whole valve body is predetermined by the shape and the form of the described suction port of the described air inlet choma of cylinder according to the present invention or cylinder liner according to the present invention according to the described valve body of intake valve of the present invention described.This suction port has generally along the microscler form of the axial direction of cylinder, and extends with constant cross section to the inboard from the outside of cylinder wall.This just means that the middle groove ridge part between the adjacent suction port narrows down from the outside to the inboard.And described suction port has and the parallel plane layout of extending along the radial direction of cylinder usually.Preferably, the direction that the described suction port of each of described air inlet choma passes described cylinder wall has an angle with respect to the radial direction of cylinder, most preferably approximately be 10 degree to 25 degree, for example about 20 degree, mix to strengthen gas so that the scavenging in the firing chamber produces rotation in flowing.
For the sake of clarity, in this application, limit the geometric properties of intake valve of the present invention with reference to the geometric properties that is provided with the described suction port of described intake valve, suppose that wherein cylinder has vertical axis, bent axle is in the bottom.Not it should be noted that and should only limit intake valve by the reference factor that in this cylinder, uses.
Sealing for the described intake valve that is formed for above-mentioned form, under the state in being assembled in described independent suction port when cylinder inside is observed, (in other words the described of described valve body be received part, valve body is as an integral body) can have elongate form, if the body of especially described intake valve only is made of the described part that is received, then described elongate form has the form of described independent suction port, so that only be formed for the sealing of the suction port that penetrated by described gas channel.No matter whether the body of described intake valve only is made of the described part that is received, described bottom contact wall section and the intermediate portion that is received top contact wall section that part can be included in place, the state next top in being assembled in suction port on one the narrow side, is being assembled in the state lower bottom part place in the suction port on its another narrow side, this intermediate portion interconnect described top contact wall section and contact wall section with described top and penetrated by described gas channel.
The outer surface of described top contact wall section for example forms wall with convex curved contacts perimeter surface in described independent suction port described on the whole width of described independent suction port top section, the outermost end that the wall of this convex curved is received part from described valve body described is projected into the described single suction port to the described innermost end portions that is received part of described valve body, preferably contact with described top, and the outer surface of described bottom contact wall section for example forms wall by convex curved contacts perimeter surface in described single suction port described on the whole width of described single suction port bottom, the wall of this convex curved is projected into from described outermost end to described innermost end portions the described single suction port, preferably contacts with described bottom.Thus, the described part that is received part that does not keep or carry the valve member of described a plurality of activities and constitute by material fully, the wall that is above-mentioned contact wall section projects upwards the described innermost end portions that is received part, so that the major component of the suction port internal volume of the overall dimensions that is helpless to gas channel is filled, and thereby avoid becoming quiet volume.
In another preferred variation, under the state in being assembled in described single suction port, the level cross-sectionn of described intermediate portion has the profile envelope of fundamental triangle, and constant in size and form that described top contact wall section contacts with described top on the whole length between the wall section at it, and described intermediate portion has along the lateral flanks of inward direction convergent.Two described lateral flanks are the lateral part of perimeter surface in the described single suction port of contact described on its whole length all, and at least one, preferred two described lateral flanks are passed by described gas channel.By intermediate portion with described structure, in order to hide described gas channel in described closed position, described a plurality of reed blade can be supported on the surface of described lateral flanks, and at open position, bending is resisted against on the described lateral part of perimeter surface in described suction port described, and the outboard end of each reed blade is fixed and the inner end of each reed blade is bent.
For this reason, described intermediate portion preferably has the stayed surface corresponding to a plurality of preferred planar of described a plurality of spring reeds on its described lateral flanks, described a plurality of spring reeds in described closed position upper support on described stayed surface and hide described gas channel.
Described lateral flanks preferably extends to described innermost end portions from described outermost end, so that reduce quiet volume.Extend to cylinder inside with respect to the radial direction of angle cylinder with an angle if not only predict suction port with intake valve, then described lateral flanks also preferably has different length, so that making described triangle envelope is not isosceles, but two flanks are all with respect to the isosceles triangle tilt angle that tilts, preferably about 10 degree are to 25 degree, for example about 20 degree, so that help or even produce the mobile rotation of scavenging in the firing chamber.
Especially for the described intermediate portion of above-mentioned structure, if each all forms rectangle preferably described a plurality of spring reed, and be connected to outer section of described flank place of described intermediate portion under the described assembled state with the attachment portion on the one side at least, thereby it is extended inward in the described single suction port.Each spring reed or reed blade can be fixedly connected to intermediate portion or be clamped in just preferably between the described lateral part at weekend in the outer surface of the described intermediate portion at the engagement convex portion place of described convergent and described suction port described.
For described intermediate portion being supported on each cross side of described convergent intermediate portion, the flank that makes its convergent is in described suction port, be provided with at least one, preferred a plurality of spaced supporting projections, preferably along continuous straight runs is outstanding to contact the lateral part of perimeter surface in described single suction port described from described intermediate portion along horizontal direction, under assembled state at described lateral flanks place for described supporting projections.
Preferably, described intermediate portion comprises two horizontal outermost piston ring land parts and an inner terminal piston ring land part, interconnect described top contact wall section described horizontal outermost piston ring land parts transversely and contact wall section with described top, described inner terminal piston ring land partly connects described top contact wall section and contacts wall section with described top, thereby makes each described lateral flanks all be stretched over the landscape surface offside of a described horizontal outermost piston ring land part from a landscape surface offside of inner terminal piston ring land part.
On the landscape surface offside of each horizontal outermost piston ring land part, can be furnished with in the described engagement convex portion.Preferably, described engagement convex portion is partly extended along whole horizontal outermost piston ring land.Preferably, described engagement convex portion contacts on the wall section with described top at described top contact wall section and laterally stretches out.Preferably, be with the lateral surfaces of each the described engagement convex portion on the respective surfaces that is compressed against the re-spective engagement groove to form respective transversal outermost piston ring land horizontal planar surface partly at least in part.That is to say that each described bump bonding can both form and the corresponding laterally part of outermost piston ring land part one by public horizontal planar surface.Thereby intermediate portion and whole valve body have the geometric properties of low side, makes easily, for example casting easily.Therefore, in another advantageous variant, described valve body is cast iron, the preferably one piece casting of gray cast iron.
Described a plurality of gas channel thereby can between described top contact wall section, described bottom contact wall section, described inside groove ridge part and a corresponding described horizontal outermost piston ring land part, be formed on one of described intermediate portion, two flank places preferably.
In order reliably and at an easy rate to fix described a plurality of spring reed, described intermediate portion can comprise corresponding to described a plurality of spring reeds and in the face of the connection surface on a plurality of planes of the lateral part of the interior perimeter surface of described single suction port.Under the described state that is assembled in the described single suction port, between the described lateral part of a plurality of interior perimeter surface that connect surface and described single suction port that described a plurality of spring Spring clips are held in described correspondence.The connection surface on described a plurality of planes can be formed on one, preferably on two horizontal outermost piston ring lands parts, with one, preferably the horizontal planar surface of two horizontal outermost piston ring lands parts forms one, and preferably form at the same time on described one of lateral surfaces of described engagement convex portion, the described part of the horizontal planar surface of preferred two horizontal outermost piston ring lands parts.Thereby, between the described lateral surfaces that described a plurality of spring reeds can be clamped in described engagement convex portion and the described corresponding surface of corresponding engagement groove.
For transportation and the installation of simplifying described intake valve, only in above-mentioned preferred another modification, it is surperficial that described a plurality of spring reeds preferably for example are connected to described a plurality of connection by bonding, soldering or spot welding in advance.
And described intake valve can comprise that the described a plurality of surface-supported a plurality of planar surfaces that are used for corresponding a plurality of spring reeds form parts on it has described innermost end portions piston ring land part on each cross side of gas channel.Described a plurality of planar surface can be a planar surface on the respective lateral side of described inner terminal piston ring land part.
And, described a plurality of stayed surface can be at least in part formed by the lateral surfaces of interconnection piston ring land, and described interconnection piston ring land interconnects in partly described at least one of described inner side slot ridge part and the described horizontal outermost piston ring land on the described flank of the described intermediate portion with gas channel.The described lateral surfaces of described interconnection piston ring land can be aimed at the described surface that is connected on the described outermost piston ring land part with the described a plurality of planar surfaces on the described inner terminal piston ring land flank partly, so that make described spring reed supported with its whole body under the closed condition of intake valve.
By the support of interconnection piston ring land, even compare, there is the overvoltage of 8 to 10 crust in the firing chamber with scavenging air belt, can prevent reliably that also the spring reed from blocking under the closed condition of intake valve.
And, described intake valve with described two horizontal outermost piston ring lands part and described inside groove ridge part can comprise at least one, a plurality of spaced separation projections preferably, described separation projection vertically interconnects two horizontal outermost piston ring lands parts and inside groove ridge part in prime number piston ring land part inboard.Because the cross section of the inboard of described piston ring land part is a general triangular, thereby the separation projection also is a general triangular.Realized the further reinforcement that is received part of valve body by described separation projection.
If described separation projection is full of material and therefore airtight body, this means that each is separated the gas channel of projection top separates hermetically with gas channel below the described separation projection, then can obtain prior effect.Then, even if the gas in the firing chamber is not avoided being reduced in position of piston at least to the shortcut of piston below volume yet, pass through the ring of described intake valve at described position of piston piston-ring packing.If separate projection continuity on the described lateral flanks outside of the described intermediate portion of described valve body, for example be extended in the described supporting projections, then strengthened this effect.
Should understand, for fear of above-mentioned short circuit effect, the distance between per two adjacent separation projections, contacting with the top that the adjacent separation projection of wall section contacts the distance between the wall and contact the distance that the adjacent separation projection of wall section contacts with the bottom between the wall section with the bottom with the top must be less than the height of piston-ring packing.
The cylinder or the cylinder liner that advantageously are provided with the motor of intake valve of the present invention can be provided with the described suction port that is provided with or is filled with described intake valve more than a circle, so that prolong opening constantly during the compression stroke of piston.Perhaps, if cylinder or cylinder liner only comprise the described suction port of a circle, then also suction port can be arranged on the place, higher position, or arrive than not making suction port longer according to the higher position of the situation of intake valve of the present invention by the upper end that makes suction port, even this is that intake valve according to the present invention also will keep inlet close during expansion stroke because the overvoltage in the firing chamber is compared with scavenging air belt up to 8 to 10 crust.
And, in having the large-sized uniflow type two stroke engine of described intake valve, the opening of exhaust valve can postpone up to piston in expansion stroke near the BDC lower dead center till, so that utilize the maximum pressure/energy that acts in the cylinder on the piston head, for example during the expansion stroke in the firing chamber 2-3 Ba Chu open timing.
Description of drawings
Hereinafter, explain the features and advantages of the present invention by accompanying drawing, wherein:
Fig. 1 is the perspective view according to the cylinder liner of the embodiment of the invention that is provided with according to the intake valve of the embodiment of the invention;
Fig. 2 is the phantom that obtains along the line II-II among Fig. 1;
Fig. 3 is one a perspective view in the intake valve shown in Fig. 1 and 2;
Fig. 4 is an intake valve shown in Figure 3 perspective view in open mode;
Fig. 5 is the following in off position perspective view corresponding to Fig. 4 of intake valve;
Fig. 6 is the perspective view of the valve body of above-mentioned intake valve shown in the drawings;
Fig. 7 is the sectional view that obtains along the line VII-VII among Fig. 3, and the intake valve that reed is opened is shown;
Fig. 8 is the sectional view corresponding to Fig. 7, and the intake valve that reed cuts out is shown;
Fig. 9 is the enlarged view of details IX among Fig. 2; With
Figure 10 is the view in the zone of regional X skew paper delivery sheet of planar among Fig. 9.
Embodiment
At first with reference to Fig. 1 and 2.Cylinder liner 2 with cylindrical shape perisporium 3 is shown, and described cylindrical shape perisporium is scattered with identical suction port 8, and described suction port is arranged as the ring 4 of described suction port 8.In the described ring 4 of suction port, the every pair of adjacent suction port 8 all is spaced from each other and opened in 9 minutes by the piston ring land part (land portion) of planting.The described suction port 8 of the described ring 4 of suction port is filled with identical intake valve 1, described intake valve has roughly V-arrangement cross section the view of Fig. 2 when observing outside cylinder, in the time of in being contained in corresponding suction port 8 fully, exterior contour is followed the profile of corresponding suction port 8.
With general view in the described intake valve 1 one is shown among Fig. 3,4 and 5.Intake valve is made of valve body 5 generally, and this valve body has by the form of described suction port 8 and predetermined elongated form of size and size, and intake valve 1 must be coupled in the described suction port.Described valve body 5 contacts wall section 13b by top contact wall section 13a generally and constitutes with the bottom, described top contact wall section contacts wall section and interconnects by intermediate portion 10 with the bottom.Described intermediate portion 10 carries reed blade 6 on an one cross side, and carries reed blade 7 on its relative cross side.
Described top contacts wall section 13a, 13b and has wall when convex curved when described cylinder liner 3 outsides are seen with the bottom, and described wall is outstanding with constant cross section on the direction of corresponding suction port 8.Described intermediate portion 10 has the flank of two inside convergents on two lateral sides, the outermost end that contacts wall section 13a, 13b from described top with the bottom projects to described top contacts wall section 13a, 13b with the bottom inner terminal.Described reed blade or spring sheet 6,7 have the essentially rectangular form, on a side, be fixedly attached to the office, outer end of the respective transversal flank of described intermediate portion 10, so that it can be flapped towards interior end with it, to open (Fig. 4) or to close gas channel 16(Fig. 6 that (Fig. 5) passes described intermediate portion 10).In its closed position, they are supported on the corresponding flank of intermediate portion 10 (Fig. 9 " closes "), and they are supported at its open position on the inner peripheral surface of corresponding suction port 8 (Fig. 9 " opens ").
Fig. 6 is shown specifically described valve body 5.The intermediate portion 10 of described valve body be included in described intermediate portion 10 horizontal outermost edges place two horizontal outermost piston ring land parts 11 and at the inner side slot ridge part 17 at the inner end place of the intermediate portion 10 of described convergent.Described outermost and inner side slot ridge part 11,17 interconnect described top and base wall part 13a, 13b.On the lateral flanks of described intermediate portion 10, connect web or connect piston ring land 14 between corresponding laterally outermost piston ring land part 11 and inner side slot ridge part 17 perpendicular to described outermost and inner side slot ridge part 11,17 extensions.The planar surface 20 of described connection piston ring land 14 on the lateral flanks of described inner side slot ridge part 17 is formed for being in the stayed surface 14,20 of the spring reed 6,7 of described closed position (Fig. 9 " closes ").
On the lateral flanks of described horizontal outermost piston ring land part 11, be provided with and form the planar surface 18 that connects surface 18, for example be connected with valve body 5 by spot welding at these planar surface 18 place's spring reeds 6,7.Described gas channel 16 passes described intermediate portion 10 between described connection piston ring land 14 lateral flanks.If described spring reed 6,7 is supported on the described stayed surface 14,20 (Fig. 8, Fig. 9 " close "), then described gas channel 16 is closed, if and described spring reed 6,7 is supported on the described lateral part of described inner circle wall of described suction port 8 (Fig. 7, Fig. 9 " open "), then described gas channel 16 is opened.
On each cross side of the intermediate portion 10 of described convergent, be provided with two spaced supporting projections 12.Described supporting projections 12 is laterally outstanding so that valve body 5 is supported in the described suction port 8, that is to say, they are outstanding in a lateral direction as far as described top and base wall part 13a, 13b, extend in parallel plane lateral part according to perimeter surface 31 in described suction port 8 described, referring to Fig. 9,10.
And described two horizontal outermost piston ring land parts 11 and described inside groove ridge part interconnect in the flank inboard by the separation projection 15 of general triangular.Described separation projection 15 evenly distributes on the length of described intermediate portion 10, and the highest and lowest is separated projection and was clipped to the distance of top contact wall section 13a and bottom contact wall section 13b in 15 minutes corresponding to the distance between the adjacent separation projection 15.On the other hand, described distance is a bit larger tham the height of pistons reciprocating ring member in described cylinder.Thus, the burning indoor gas is closed at least substantially to the shortcut of not expecting of piston below volume during piston (exactly being piston-ring packing) process.The size of described shortcut is reduced to the cross section of the lateral flanks front space of intermediate portion 10.If described separation projection 15 is extended in the supporting projections 12 on the lateral flanks outside, then this cross section also can be closed at least in part.Therefore, the gas pressure in the firing chamber can not descend suddenly in the moment of piston process, and is same, though this moment corresponding air inlet open, the escape of the suction port 8 by described air inlet choma 4 is also by the over-voltage locking in the scavenging air belt.
For described intake valve 1 is fixed in the corresponding suction port, preferably shown in Fig. 7 and 8, the described intermediate portion 10 of described valve body 5 comprises engagement convex portion 19 on two outer lateral, described engagement convex portion contacts with the bottom at described top on the transverse edge of wall section 13a, 13b laterally protrudes or stretch out.Described engagement convex portion 19 is integral parts of described horizontal outermost piston ring land part 11.Described engagement convex portion 19 is used for the described lateral part (Fig. 9 and 31 indications of 10 usefulness reference characters) that outer edge in the piston ring land part 9 of the described plant of the outer surface of described cylinder liner 2 engages perimeter surface in the engagement grooves 32 of corresponding groove or convergent and corresponding suction port 8 described.
Referring now to described Fig. 9 and 10, explain the structure of the described intake valve 1 in the described suction port 8 and fixing.In Fig. 9, a suction port 8 is depicted as intake valve 1 and closes, and is marked with " closing ", and adjacent suction port 8 is depicted as intake valve 1 and opens, and is labeled as " opening ".Should be understood that this is just for illustrated purpose.
As mentioned above, each intake valve 1 all comprises described engagement convex portion 19, joins in the corresponding described groove 32 with the outer lateral place of the piston ring land part 9 of each plant of described cylinder wall 3 between the suction port 8 of described air inlet choma 4.Between the common surface and corresponding horizontal outermost piston ring land part 11 of each right described engagement convex portion 19 of landscape surface, promptly, between the apparent surface of the stayed surface 18 shown in Figure 6 and the respective groove of engagement grooves 32, spring reed 6,7 is held and fix in position thus.
Cooperate with the form of described engagement grooves 32 by described engagement convex portion 19, whole intake valve 1 is also fixing, can not move in the firing chamber.For fixing intake valve 1 and make it can be along the outward direction corresponding suction port 8 that moves out of, be provided with mounting rod 34, each mounting rod 34 all is fixed on the piston ring land part 9 of described plant from the outside, and on the transverse edge of the piston ring land part 9 of described plant, stretch out, promptly, outstanding on the engagement convex portion 19 of described intake valve valve body 5, and it is in place to push corresponding intake valve 1.
Preferably as shown in figure 10, the piston ring land part 9 of the described plant of described cylinder wall 3 is narrower, and only be provided for the space of single tapped hole 33, so that make the overall dimensions maximum of gas flow path of the described suction port 8 of the described air inlet choma 4 by being filled with described intake valve 1.Therefore, enough spaces of the mounting flange that is installed into valve will be not used in.This problem solves by described mounting rod 34, and described mounting rod 34 is fixed to the piston ring land part 9 of the described plant of described cylinder wall 3 to the screw 35 in the described single tapped hole 33 by screwed.
Figure 10 along from the paper plane outward direction with respect to Fig. 9 skew and obtain, so that can see in the described screw 35 one.And, in Figure 10, intake valve 1 shown in one the sectional view in passing its separation projection 15.
And Fig. 9 and 10 illustrates suction port 8 and has observed constant width in the cylinder-bore axis plane.This piston ring land part 9 that just means described plant narrows down to the inboard from the outside of cylinder 2.And the axis of symmetry that shows described suction port approximately is 20 degree with respect to the skew of cylinder longitudinal axis in the example shown, so that produce rotation in the scavenging that flows into.Valve body 5 is followed the above-mentioned skew of the suction port axis of symmetry with respect to the cylinder radial direction.Promptly, its profile envelope in described cylinder-bore axis plane is not an isosceles triangle, but the convergent flank with reed 6 is longer, and the convergent flank with reed 7 is shorter, so that even described intake valve is positioned in the described suction port, the scavenging that flows into also can be rotated, shown in big arrow among Fig. 9.In fact, spring reed 6,7 sizes can be identical, so that can use common port.
Modification of the foregoing description and change are feasible, and do not depart from the scope of the present invention.
Claims (17)
1. the intake valve (1) that is used for the large-sized uniflow type two stroke engine, be used for locking and open the gas flow channel that passes air inlet choma (4), described air inlet choma passes the cylinder wall (3) of the cylinder of described motor and the volume of cylinder of the piston top of described motor in the scavenging air belt of described motor and the described cylinder is coupled together, if the pressure in the wherein described scavenging air belt is lower than the pressure in the described volume of cylinder, then described intake valve (1) locks described gas flow channel, if and the pressure in the described scavenging air belt is higher than the described pressure in the described volume of cylinder, then described intake valve is opened described gas flow channel, described intake valve (1) comprises valve body (5), this valve body keeps the valve member (6 of a plurality of activities, 7), described valve body can be mounted to described cylinder, so that valve member (6 with described activity, 7) be arranged in the described gas flow channel, the valve member (6 of wherein said activity, 7) be arranged to and move to closed position and return from open position, open at the described gas flow channel of described open position, close at the described gas flow channel of described closed position, it is characterized in that
Described intake valve (1) is designed for locking and opens the gas flow channel of the single suction port (8) that passes described air inlet choma (4), and wherein
Described valve body (5) can preferably be installed in described single suction port (8) from the described cylinder outside, and form the Sealing that is used for described single suction port (8), only penetrated by a plurality of gas channels (16), and the valve member (6 of wherein said a plurality of activities, 7) be arranged to and be dimensioned to opening and closing described a plurality of gas channels (16), and wherein
Described intake valve (1) be dimensioned to and described valve body (5) can be mounted to and makes the suction port (8) of the described air inlet choma (4) adjacent with described single suction port (8) also can be provided with same intake valve (1), and wherein
Described valve body (5) comprises at least substantially and is received part, this is received partly to form and is contained at least substantially in the described single suction port (8), fill described single suction port (8) thus at least in part, and the valve member of described activity (6,7) is contained in the described single suction port (8) at least substantially.
2. intake valve according to claim 1 (1), it is characterized in that, when cylinder inside was observed, the part that is received of described valve body (5) had elongate form with the profile of described single suction port (8), and comprises under the state in being assembled in described single suction port (8)
Top contact wall section on an one narrow side, (13a), this top contact wall section has outer surface, this outer surface for example forms wall by convex curved at described single suction port, (8) the described single suction port of contact on the whole width, (8) interior perimeter surface, (31) top, the wall of this convex curved is from described valve body, (5) the described outermost end of part that is received is to described valve body, (5) the described innermost end portions that is received part is projected into described single suction port, (8) in, preferably contact with described top
Bottom contact wall section (13b) on its another narrow side, this bottom contact wall section has outer surface, this outer surface forms the bottom that for example contacts the interior perimeter surface (31) of described single suction port (8) by the wall of convex curved on the whole width of described single suction port (8), the wall of this convex curved is projected into the described single suction port (8) from described outermost end to described innermost end portions, preferably contact with described bottom and
Intermediate portion (10), this intermediate portion contacts wall section (13b) with described top contact wall section (13a) and is connected with each other with described bottom, and is penetrated by described gas passageway (16).
3. intake valve according to claim 2 (1), it is characterized in that, under the state in being assembled in described single suction port (8), the level cross-sectionn of described intermediate portion (10) has the profile envelope of fundamental triangle, and it is constant in size and form that described top contact wall section (13a) contacts with described top on the whole length between the wall section (13b) at it, and described intermediate portion has along the lateral flanks of inward direction convergent, described lateral flanks preferably extends to described innermost end portions from described outermost end, wherein
Two described lateral flanks are the lateral part of perimeter surface (31) in the described single suction port of contact (8) described on its whole length all, and at least one, preferred two described lateral flanks are passed by described gas channel (16), and wherein
Especially described lateral flanks has different length, is not isosceles so that make described triangle envelope, but two flanks are all with respect to the isosceles triangle tilt angle that tilts, preferably about 20 degree.
4. intake valve according to claim 3 (1), it is characterized in that, on each cross side of the intermediate portion (10) of described convergent, all be provided with at least one, preferred a plurality of spaced supporting projections (12), preferably along continuous straight runs is outstanding to contact the lateral part of perimeter surface (31) in described single suction port (8) described from described intermediate portion (10) along horizontal direction, under assembled state at described lateral flanks place for described supporting projections.
5. according to claim 2,3 or 4 described intake valves (1), it is characterized in that, described lateral part (10) on two cross sides described be received the part described outermost end near comprise engagement convex portion (19), described engagement convex portion contacts on the wall section (13b) with described top at described top contact wall section (13a) laterally stretches out, in the re-spective engagement groove that joins the transverse part office of perimeter surface (31) in the outer surface edge place of described cylinder and described single suction port described to, wherein said engagement convex portion (19) especially convergent with in the groove that joins convergent especially to, and wherein said lug boss (19) preferably forms the alignment portion of described lateral flanks of described triangle envelope of the profile of described level cross-sectionn on its outer surface.
6. according to any described intake valve (1) in the claim 3 to 5, it is characterized in that described intermediate portion (11,14,15,16,17) comprises
Two horizontal outermost piston ring land parts (11), described horizontal outermost piston ring land part preferably laterally interconnects described top contact wall section (13a) and contacts wall section (13b) with described top at described outermost end place, with inner terminal piston ring land part (17), this inner terminal piston ring land part preferably connects described top contact wall section (13a) and contacts wall section (13b) with described top at described inner terminal place, thereby make each described lateral flanks all be stretched over the partly landscape surface offside of (11) of a described horizontal outermost piston ring land, wherein from a landscape surface offside of inner terminal piston ring land part (17)
Described a plurality of gas channel (16) is at least on the side, preferably be formed on described top contact wall section (13a), described bottom contact wall section (13b), described inside groove ridge part (17) and described horizontal outermost piston ring land partly between corresponding in (11) on both sides.
7. intake valve according to claim 6 (1), it is characterized in that, described two horizontal outermost piston ring lands parts (11) and described inside groove ridge part (17) are by at least one, preferably a plurality of spaced separation projections (15) vertically interconnect, described separation projection is in described two transverse groove ridge parts (11) and described inside groove ridge part (17) inboard, makes that separating the gas channel (16) of projection (15) top at each separates hermetically with gas channel (16) below described separation projection (15).
8. any described intake valve (1) in requiring according to aforesaid right is characterized in that, the valve member of described a plurality of activities (6,7) forms a plurality of flat and flexible spring reeds (6,7).
9. intake valve according to claim 8 (1), it is characterized in that, described a plurality of spring reed (6,7) each all forms rectangle, and locate to be connected to described valve body (5) in the attachment portion on the one side (22) under the described assembled state at least, preferably be connected in the described horizontal outermost piston ring land part (11), so that it is extended inward in the described single suction port (8), and wherein said valve body (5), the described intermediate portion (10) on its described lateral flanks preferably, have corresponding to described a plurality of spring reeds (6, the stayed surface (14 of a plurality of preferred planar 7), 20), described a plurality of spring reeds (6,7) in described closed position upper support on described stayed surface and hide described gas channel (16).
10. according to Claim 8 or 9 described intake valves (1), it is characterized in that, described intermediate portion (10) preferably comprises on the cross side of described engagement convex portion (19) corresponding to described a plurality of spring reeds (6, the connection surface (18) of a plurality of preferred planar 7), so that under described assembled state, described a plurality of spring reed (6,7) be clamped between the described lateral part of described a plurality of interior perimeter surface that connect surface (18) and described single suction port (8), wherein said a plurality of spring reeds (6,7) are preferably for example by bonding, soldering or spot welding and be connected to described a plurality of connection surface (18) in advance.
11. according to Claim 8,9 or 10 described intake valves (1), it is characterized in that, described inner terminal piston ring land part (17) all has a plurality of planar surfaces (20) on it has each side of gas channel (16), described a plurality of spring reeds (6 on this side that is used for the described accommodation section of described valve body (5) dividing, 7), form described a plurality of stayed surface (14,20) at least a portion, and/or be received the described valve body (5) with gas channel (16) described described at least horizontal outermost piston ring land part (11) on described at least one side of part in the zone that connects between surface (18) and the described inside groove ridge part (17) by being connected piston ring land (14) and described inside groove ridge part (17) interconnects, described connection piston ring land (14) forms at least a portion of described a plurality of stayed surfaces (14,20).
12. any described intake valve (1) according in the aforesaid right requirement is characterized in that described valve body (5) is the cast iron single-piece, preferably the gray cast iron single-piece.
13. be used for the cylinder liner (2) of large-sized uniflow type two stroke engine, described cylinder liner has the cylinder wall (3) of part of the wall (3) of the cylinder that is used to form described motor, at least one air inlet choma (4) that wherein said cylinder wall (3) is passed described cylinder wall (3) penetrates, so that the volume of cylinder of the piston top of described motor in the scavenging air belt of described motor and the described cylinder is coupled together, it is characterized in that, each suction port (8) of described air inlet choma (4) all is formed for according to any one described one the independent intake valve (1) in the aforesaid right requirement, and locate to be provided with the erecting device (32,33) that is used for described intake valve (1) at each suction port (8) of described air inlet choma (4).
14. cylinder liner according to claim 16 (2), it is characterized in that, the described erecting device of locating at each single suction port (8) (32,33) be included in the engagement grooves (32) of the preferably convergent of the transverse part office of perimeter surface (31) in the outer surface edge of described cylinder liner (2) and described single suction port (8) described, described engagement grooves is used for the engagement convex portion (19) that forms on each described intake valve, and/or be preferably incorporated in single tapped hole (33) in the piston ring land part (9) of each plant between per two adjacent suction ports (8) of described air inlet choma (4) at the described erecting device (32,33) that each single suction port (8) is located.
15. large-sized uniflow type two stroke engine, it has at least one cylinder, described cylinder has cylinder wall (3), at least one air inlet choma (4) that wherein said cylinder wall (3) is passed described cylinder wall (3) penetrates, so that the volume of cylinder of the piston top of described motor in the scavenging air belt of described motor and the described cylinder is coupled together, it is characterized in that each independent suction port (8) of described air inlet choma (4) all is provided with according to any one in the aforesaid right requirement 1 to 12 described one intake valve (1) independently.
16. motor according to claim 15, it is characterized in that, each independently suction port (8) all be provided with the engagement grooves of the preferably convergent of the transverse part office of perimeter surface (31) in the outer surface edge of described cylinder liner (2) and described single suction port (8) described, and each described intake valve (1) all is provided with the described part that is received, and the described part that is received has the described engagement convex portion that crosses out (19) that joins in the described engagement grooves.
17. according to claim 15 or 16 described motors, it is characterized in that, the insertion slot ridge part (9) that between at least two adjacent suction ports (8) of described air inlet choma (4), has cylinder wall (3), for example be fixed with mounting rod (34) on this insertion slot ridge part by screw (35), described screw thread is screwed in the single tapped hole (33) in the described insertion slot ridge part (9), wherein said mounting rod (34) is outstanding on the lateral surfaces of described insertion slot ridge part (9), and is pressed on the intake valve (1) in described two adjacent suction ports (8) of described air inlet choma (4).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201200081 | 2012-01-30 | ||
| DKPA201200081A DK179051B1 (en) | 2012-01-30 | 2012-01-30 | Large two-stroke engine, inlet valve and cylinder liner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103225524A true CN103225524A (en) | 2013-07-31 |
| CN103225524B CN103225524B (en) | 2017-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310034891.8A Expired - Fee Related CN103225524B (en) | 2012-01-30 | 2013-01-30 | Large two-stroke engine, inlet valve and cylinder liner |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6132184B2 (en) |
| KR (1) | KR101694740B1 (en) |
| CN (1) | CN103225524B (en) |
| DK (1) | DK179051B1 (en) |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106065827A (en) * | 2016-05-18 | 2016-11-02 | 宁波大叶园林设备有限公司 | Use the two stroke engine of left box body square hole filter screen turbulent flow scavenging |
| CN106351729A (en) * | 2016-09-05 | 2017-01-25 | 宁波大叶园林设备有限公司 | Two-stroke engine for performing turbulence scavenging through right bent axle tank body with multi-irregularly-shaped partition |
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- 2013-01-29 JP JP2013013805A patent/JP6132184B2/en not_active Expired - Fee Related
- 2013-01-29 KR KR1020130009922A patent/KR101694740B1/en active IP Right Grant
- 2013-01-30 CN CN201310034891.8A patent/CN103225524B/en not_active Expired - Fee Related
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| DE4011140A1 (en) * | 1990-04-06 | 1991-01-17 | Werner Bohne | Two stroke IC engine - has piston rod fitted with transverse pin with rollers which run in sinusoidal slot |
| US5345897A (en) * | 1992-07-31 | 1994-09-13 | Robert Bosch Gmbh | Gas-exchanging process for two-stroke, internal combustion engines |
| CN1460783A (en) * | 2002-05-21 | 2003-12-10 | 曼B与W狄赛尔公司 | Compacting purified air gas storage chamber and cylinder structure |
| CN1854492A (en) * | 2005-04-27 | 2006-11-01 | 安德烈亚斯.斯蒂尔两合公司 | Cylinder for two cycle engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DK201200081A (en) | 2013-07-31 |
| CN103225524B (en) | 2017-05-03 |
| JP6132184B2 (en) | 2017-05-24 |
| DK179051B1 (en) | 2017-09-18 |
| KR101694740B1 (en) | 2017-01-10 |
| JP2013155737A (en) | 2013-08-15 |
| KR20130088072A (en) | 2013-08-07 |
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