CN1039552C - Cylinder head for internal combustion engines, with a device for pneumatically assisted direct fuel injection - Google Patents
Cylinder head for internal combustion engines, with a device for pneumatically assisted direct fuel injection Download PDFInfo
- Publication number
- CN1039552C CN1039552C CN93121068A CN93121068A CN1039552C CN 1039552 C CN1039552 C CN 1039552C CN 93121068 A CN93121068 A CN 93121068A CN 93121068 A CN93121068 A CN 93121068A CN 1039552 C CN1039552 C CN 1039552C
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- CN
- China
- Prior art keywords
- engine cylinder
- valve
- chamber
- air
- fuel
- 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
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 13
- 238000002347 injection Methods 0.000 title claims description 10
- 239000007924 injection Substances 0.000 title claims description 10
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 claims 1
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 238000005461 lubrication Methods 0.000 abstract description 2
- 230000001360 synchronised effect Effects 0.000 abstract 1
- 238000010304 firing Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000003921 oil Substances 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Fuel-Injection Apparatus (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
To eliminate the need for a high pressure air and facilitate lubrication by disposing a piston injecting air-fuel mixture inside a chamber whose one side is linked with a valve and whose other side is linked with a feeding means of air and fuel and driving the piston mechanically by means of a crankshaft. A cylinder head 11 is provided with a combustion chamber 12 at the lower part, and a fuel injector 15 at an upper movable part 13. The inside of the cylinder head 11 and the movable part 13 is formed with a chamber 16 and the outside is formed with a protruding part 17. A shaft 18 is supported by a bearing 19 at the protruding part 17 and the one end part of the shaft 18 is mounted eccentrically to the one end part of a connecting rod 22 by means of a pin 21. The other end part of the connecting rod 22 is mounted to an injecting piston 23. A pulley 33 is mounted at the end part protruding outward from the cylinder head 11 of the shaft 18, which is rotation-driven by a crankshaft through a synchronous belt 34.
Description
The present invention relates to a kind of combustion engine cylinder head with device for pneumatically assisted direct fuel injection.In combustion engine cylinder head, be known at present by the whole bag of tricks of pneumatic auxiliary direct fuel injection.In the certain methods therein, be to produce high-pressure air by the appropriate device outside the motor, fuel is injected in the suitable chamber, and then formed synthetic mixture is guided to the firing chamber by the Open valve that is arranged in cylinder and covers in this chamber.
In these various known methods, may there be different types, i.e. one type of small bore valve with high-pressure air and electro-mechanical manipulation, second type then has the big valve that low-pressure air and complete mechanical are handled.
Yet should be noted that especially under the situation of mini engine, there are various shortcomings in above-mentioned two kinds of main types.
American documentation literature US2710600 has just narrated a kind of combustion air ejecting system, it comprises the Pneumatic actuator of fuel at least one cylinder direct injection, fuel supplying device one side links to each other with valve, the chamber that opposite side links to each other with air feeder, piston to-and-fro motion in described chamber, be used for air/fuel mixed gas that chamber is produced, be ejected at least one cylinder through valve, described piston is mechanically operated by the driving mechanism of crank-driven.
First type because pressurized air must reach high pressure, thereby its complex structure.And owing to except the opening time, must control time for spraying, thereby make the electric valve control loop complicated.
Described second type then exists lubrication problem, and it must have a compensation vessel that is used to regulate pressure difference between crankcase and the injection valve.This makes needs fringe cost and space.
The purpose of this invention is to provide a kind of by eliminating high-pressure air, lubricated easily and reduce the combustion engine cylinder head of desired control and check in the above-mentioned known method.
This purpose can realize by the described cylinder head of claim 1 of the present invention.
A kind of combustion engine cylinder head, has one with the pneumatic auxiliary device of fuel at least one cylinder direct injection, this pneumatic auxiliary device has a side and has valve openings corresponding to valve, the chamber that opposite side is connected with the air feeder of air or fuel, a spritzpistole that in described chamber, moves, the air and fuel mixture that is used for chamber is produced is ejected in described at least one pneumatic auxiliary device through valve openings, described spritzpistole is mechanically operated described air or is added the pipeline that the air feeder that fuel is arranged comprises the air of an air supply or additional fuel by a driving mechanism by crank-driven, it is characterized in that, at an end of described pipeline, the described chamber of facing has a valve element.
Have shown in the non-limitative example and accompanying drawing of structure of the present invention and operation characteristic and advantage:
Fig. 1 is the lateral plan of the cylinder head of the present invention on the cylinder of internal-combustion engine;
Fig. 2 is for by Fig. 1 top opposite direction, i.e. drawing in side sectional elevation by cylinder head of the present invention;
Fig. 3 passes the partial cross-sectional view of cylinder head shown in Figure 1 through III-III line shown in Figure 2;
Fig. 4 is the local enlarged detail of Fig. 3;
Fig. 5 is cylinder head second embodiment's side elevation in partial section of the present invention;
Fig. 6 is cylinder head the 3rd embodiment's side elevation in partial section of the present invention;
Fig. 7 is the detail drawing of flap thin slice shown in Figure 6;
Fig. 8 is the 4th embodiment's side elevation in partial section of cylinder head of the present invention;
Fig. 9 is the broken section detail drawing of rolling disc shown in Figure 8.
Referring to Fig. 1, it shows an internal-combustion engine pneumatic auxiliary device 51, has a corresponding bent axle and a corresponding top cover 11.Below have the cylinder head 11 of firing chamber 12, but it reaches a demolition part 13 to above-mentioned, this part has the electromagnetism fuel nozzle that for example holds in present 14 by label 15 expressions.
In removable section 13 and cylinder head 11 inside, has a chamber 16.In addition, it has one stretches out from cylinder head 11 and removable section 13, is positioned at the part 17 on chamber 16 next doors.In described extension 17, has a axle 18 by two bearing 9 rotational support.The first end of facing the axle 18 of chamber 16 passes through corresponding pin 21, the eccentric first end that is rotationally coupled to connecting rod 22.Link to each other with spritzpistole 23 rotationally by 54 at the other end connecting rod, eject in the chamber 16 formed air fuel mixture one by one at compression stage.
Be arranged in an end seal element 13 (Fig. 4) or be positioned at the shell 25 of one of its end wall 27 (Fig. 5,6 and 8), with one movably the umbrella shape valve be contained in a suitable valve base 28 or the valve hole, this valve has been determined the sealing of 28 times faces of valve base.Valve base 28 upwards is connected in the following elongated portion 24 of chamber 16 by a series of holes 30.Umbrella shape valve 29 remains on a sealing position by a cup-shaped spring that is installed on the valve handle 32.
And, on an end of the axle 18 that reaches cylinder head 11 outsides, having a belt pulley 33, this belt pulley is by a Toothed belt rotary driving that is driven by bent axle 52 rotations.
In first embodiment, as shown in Figures 1 to 3, axle 18 is hollow shafts, and a hole or a radial hole 62 in the face of admission line 63 is arranged, hole or radial hole 62 with two as air or the conduit 64 that the air that the fuel that provided by nozzle 15 or fuel oil are arranged is provided be connected with 65.Be appreciated that air, oil plant and/or fuel then can be transported in the firing chamber 16 by their corresponding pipeline and hollow shaft 18.
In following embodiment (Fig. 5,6 and 8), still use identical label with the said elements components identical.And axle 18 is not hollow, and has the spacer sleeve 35 that remains on extension 17 inside by their corresponding lid (not shown).
Between bearing 19 and plate part 20, has seal ring 36.
According to cylinder head of the present invention, in the replaceable scheme of Fig. 5 to 9, the end exit portion of instead of null axle be a pipeline 37.The air the same with the situation that has hollow shaft, that this pipeline 37 is used to carry air or mixes mutually with fuel and/or oil plant from nozzle 15.
The end of this pipeline 37 is in second embodiment shown in Figure 5, by the valve element sealing of being made up of a thin slice 38 at least.The aperture of maximum thin slice is determined by the rigidity barrier element 39 that is fixed on by screw 40 on thin slice one end.
Fig. 6 and Figure 7 shows that the third scheme of cylinder head of the present invention, wherein components identical is represented with identical label.
In this scheme, described valve element has different shapes.The end of pipeline 37 has different opening 41, has 4 here, and 4 flat sheet 42 are installed in the above.Above-mentioned flat sheet 42 is fixed on the rigidity barrier element 44 with respective shapes by bolt 43.
Fig. 8 and the 4th kind of scheme that Figure 9 shows that cylinder head of the present invention, wherein components identical is represented with identical label.In this scheme, valve element is made up of a rolling disc 45.
The dish of being made by very light material 45 is fixed on a pin or the crank pin 21 by a stable pin 46, drives by plate part 20 and rotates.At the center, described dish 45 further is articulated on the wall of internal chamber 16 by pin 47.As shown in Figure 9, dish 45 has the circumferential section that is bigger than semi-circumference slightly, like this, when it rotates around pin 46, can open or close pipeline 37.
Yet in all above-mentioned schemes, the piston 23 of chamber 16 inside can be by infeeding air the pneumatic auxiliary direct injection of fuel of carrying out in the firing chamber 12 below the cylinder.
Put it briefly, cylinder head of the present invention can be moved in the following manner.
According to the foregoing description, air or additional have from the fuel of nozzle 15 and/or the air of oil plant is alternately through the axle 18 or the pipeline 37 of hollow.
To under the stable condition, the mixture that is obtained is in case by being positioned at the raised side part 26 of chamber 16 bottoms 24 various, and then this mixture is with regard to injected piston 23 compressions.The elastic force that the pressure that forms between spritzpistole 23 and valve base 28 overcomes cup-shaped spring 31 moves downward umbrella shape valve 29, and mixture is injected in the following firing chamber 12 as a result.
Cylinder head of the present invention does not need to supply with high-pressure air in chamber 16, thereby has avoided the use corresponding device thereof.So just do not need expensive component, and eliminated and the relevant problem of timing of carrying out high-pressure air and fuel supply by nozzle and electric valve.
In first kind of embodiment, directly the oil plant of being supplied with by admission line 63 is enough to satisfied lubricating, thereby all parts can normally be moved, and has cancelled supply container.
Thereby the scheme shown in other use one or more thin slices as valve element at compression stage, guaranteed good lubricating, scheme with rolling disc then has a less Sealing, particularly when low speed, in any case, cylinder head of the present invention allows in the crank box of pre-press pump a dead volume that suitably reduces is arranged, and its advantage is under the pre-slow-revving situation of press pump, also can aspirate effectively.
Its structure of cylinder head and the operation that is used for internal-combustion engine of the present invention reduced cost especially simply widely, makes it to be specially adapted to two stroke engine and many advantages are arranged.
Claims (15)
1) a kind of combustion engine cylinder head, has one with the pneumatic auxiliary device of fuel at least one cylinder direct injection, this pneumatic auxiliary device has one one side and is connected with described valve, the chamber that opposite side and air or the additional air feeder that fuel arranged are connected, a spritzpistole that in described chamber, moves, be used for air and fuel mixture that chamber is produced, be ejected in described at least one pneumatic auxiliary device through valve openings, described spritzpistole is mechanically operated by a driving mechanism by crank-driven, described air or the additional air feeder that fuel arranged comprise the air conduit of an air supply or additional fuel, it is characterized in that having a valve element at the right described chamber of an end face of described pipeline.
2) engine cylinder cap according to claim 1 is characterized in that described valve element is made up of a thin slice at least.
3) engine cylinder cap according to claim 2 is characterized in that being connected with the rigidity barrier element on described at least one thin slice.
4) engine cylinder cap according to claim 2 is characterized in that above-mentioned at least one thin slice is a flap thin slice, and each lobe of wherein said at least one thin slice is corresponding with corresponding each opening of described pipeline.
5) engine cylinder cap according to claim 1 is characterized in that described valve element is to be made of the rolling disc that seals described pipeline.
6) engine cylinder cap according to claim 5, it is characterized in that described rolling disc is fixed on a pin or the crank pin by a stable pin, thereby drive by described piston drive axle rotation, described dish is articulated on the wall from its center, and the outlet end of described pipeline then is positioned on this wall.
7), it is characterized in that described dish has a circumferential section that is a bit larger tham semi-circumference according to claim 5 or 6 described engine cylinder caps.
8) a kind of combustion engine cylinder head, has one with the pneumatic auxiliary device of fuel at least one cylinder direct injection, this pneumatic auxiliary device has one one side and is connected with described valve, the chamber that opposite side and air or the additional air feeder that fuel arranged are connected, a spritzpistole that in described chamber, moves, be used for air and fuel mixture that chamber is produced, be ejected in described at least one pneumatic auxiliary device through valve openings, described spritzpistole is mechanically operated by a driving mechanism by crank-driven, described air or the additional air feeder that fuel arranged comprise the pipeline of the air of an air supply or additional fuel, it is characterized in that above-mentioned service is to be made up of a hollow shaft that is supported on rotationally in the above-mentioned chamber at least, above-mentioned hollow shaft is driven pivotally by above-mentioned driving mechanism and has one towards above-mentioned chamber interior and be positioned at the part of a connecting rod one end prejudicially with pin, and the other end of connecting rod then is articulated on the above-mentioned spritzpistole.
9) engine cylinder cap according to claim 8 is characterized in that described hollow shaft is protruding from cylinder head, so that support a belt pulley that becomes the Toothed belt driving of the rigidly connected second belt pulley driven rotary with bent axle by.
10) according to claim 1 or 8 described engine cylinder caps, it is characterized in that described spritzpistole can slide in the elongated portion below the chamber that inside and outside shell limits, the described elongated portion of described spritzpistole upstream and downstream is connected by a pipeline at least.
11) engine cylinder cap according to claim 10 is characterized in that in the described shell, and at least one pipeline is that side direction is outwards protruded.
12) according to claim 1 or 8 described engine cylinder caps, the described valve that it is characterized in that being contained in the described valve openings is a umbrella shape valve of slidably handling in valve base, it has an elastic element, and under static state, it allows valve come the opening of closing valve.
13) engine cylinder cap according to claim 12 is characterized in that described valve base has a lower openings that is close together mutually with the umbrella shape end of described valve, and has a series of holes on its top, and a bar can slide by these holes.
14) engine cylinder cap according to claim 12 is characterized in that described elastic component is a cup-shaped spring.
15) engine cylinder cap according to claim 8 is characterized in that facing on away from the rotational support of described cylinder head part, described axle is provided with a seal washer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI93A001824 | 1993-08-12 | ||
| ITMI931824A IT1272516B (en) | 1993-08-12 | 1993-08-12 | HEAD FOR C.I. WITH DEVICE FOR PNEUMATICALLY ASSISTED DIRECT FUEL INJECTION |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1099102A CN1099102A (en) | 1995-02-22 |
| CN1039552C true CN1039552C (en) | 1998-08-19 |
Family
ID=11366815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93121068A Expired - Fee Related CN1039552C (en) | 1993-08-12 | 1993-11-11 | Cylinder head for internal combustion engines, with a device for pneumatically assisted direct fuel injection |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2693711B2 (en) |
| CN (1) | CN1039552C (en) |
| IT (1) | IT1272516B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996228A (en) * | 2012-12-21 | 2013-03-27 | 浙江欧耀机械有限公司 | Axial-flow air inlet mechanism for two-stroke engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2710600A (en) * | 1950-05-31 | 1955-06-14 | Daimler Benz Ag | Air injection system for internal combustion engines |
| US5048497A (en) * | 1989-02-22 | 1991-09-17 | Yamaha Hatsudoki Kabushiki Kaisha | Fuel injection unit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5546509A (en) * | 1978-09-28 | 1980-04-01 | Agency Of Ind Science & Technol | Method of manufacturing solar battery |
| JPS6033339U (en) * | 1983-08-11 | 1985-03-07 | 富士写真フイルム株式会社 | Film conversion display mechanism |
-
1993
- 1993-08-12 IT ITMI931824A patent/IT1272516B/en active IP Right Grant
- 1993-11-11 CN CN93121068A patent/CN1039552C/en not_active Expired - Fee Related
- 1993-11-11 JP JP5304604A patent/JP2693711B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2710600A (en) * | 1950-05-31 | 1955-06-14 | Daimler Benz Ag | Air injection system for internal combustion engines |
| US5048497A (en) * | 1989-02-22 | 1991-09-17 | Yamaha Hatsudoki Kabushiki Kaisha | Fuel injection unit |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1272516B (en) | 1997-06-23 |
| JPH0763141A (en) | 1995-03-07 |
| ITMI931824A1 (en) | 1995-02-12 |
| CN1099102A (en) | 1995-02-22 |
| JP2693711B2 (en) | 1997-12-24 |
| ITMI931824A0 (en) | 1993-08-12 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: PIAGGIO & C. S.P.A Applicant before: Skin test sub Wei Leo |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: PIAGGIO VECOLIO CO.,LTD. TO: PIAGGIO S.P.A. |
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| C56 | Change in the name or address of the patentee |
Owner name: MOD STOCK CO., LTD. Free format text: FORMER NAME OR ADDRESS: PIAGGIO S.P.A. |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: MOD AG Patentee before: PIAGGIO & C. S.P.A |
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| C56 | Change in the name or address of the patentee |
Owner name: PIAGGIO S.P.A. Free format text: FORMER NAME OR ADDRESS: MOD STOCK CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Patentee after: PIAGGIO & C. S.P.A Patentee before: MOD AG |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19980819 Termination date: 20091211 |