CN87102814A - A kind of two stroke engine - Google Patents
A kind of two stroke engine Download PDFInfo
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- CN87102814A CN87102814A CN 87102814 CN87102814A CN87102814A CN 87102814 A CN87102814 A CN 87102814A CN 87102814 CN87102814 CN 87102814 CN 87102814 A CN87102814 A CN 87102814A CN 87102814 A CN87102814 A CN 87102814A
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Abstract
A kind of two stroke engine, it comprises (a) single-piston cylinder body, (b) transfer port, (c) suction port that is disposed in the cylinder body, (d) relief opening that is disposed in the cylinder body, (e) piston that is installed in the cylinder body, (f) one with piston all-in-one-piece or the connecting rod that becomes other modes to rigidly fix with piston, (g) crankcase that is installed on the piston adjacency, (h) bent axle that is disposed in the crankcase, (i), (j) be installed in the interior electric ignition device of crankcase in the rotatable connection that can make bent axle be easy in crankcase, rotate between the crankshaft-and-connecting-rod.Bent axle preferably disposes a magnet, and when the magnet conducting, electric ignition device moves in crankcase, makes it be in a certain position of top dead center leading or hysteresis.Reduction valve of piston head configuration more makes motor be easy to starting.
Description
The present invention relates to a kind of two stroke engine that is applicable to mowing machine, chain saw, branch cut-off machine, generator, edge cutter, compactor and similar facility.Can expect that from above-mentioned example two stroke engine of the present invention not only can be applicable to movably install but also can be applicable on the stationary device.But the present invention at first is the motor that is used for mowing machine.
The two stroke IC engine of conventional employing fan-type scavenging comprises the piston that is suitable for energy up-and-down movement in cylinder body, and this piston is connected with rotating bent axle in the cylinder body float chamber below being disposed at cylinder body and that communicate with each other by connecting rod.When first stroke began, piston was in the extreme higher position.When the compressed gasoline of piston top and AIR MIXTURES were lighted, piston promoted the Exhaust Open in cylinder body downwards.The combustion gas that still is in high pressure in cylinder body can be discharged from relief opening.When piston further descended, its upper surface can be opened the suction port in the cylinder body, fresh gasoline and AIR MIXTURES is entered in the cylinder body combustion gas of remnants is discharged.When piston at piston when second stroke rises once more, relief opening and suction port are all closed a period of time, in this time, gasoline and AIR MIXTURES are compressed so that begin new circulation.Being disposed in the suction port or near the fan of suction port forces fresh gasoline and AIR MIXTURES to enter in the cylinder body.
The two stroke IC engine of general crankcase scavenging is not to be with scavenge air blower, and crankcase is airtight sealing makes it can play the function of pump together with piston.When piston rises, can in crankcase, producing before the piston lower surface is opened suction port parital vacuum, this has just opened path for fresh gasoline and AIR MIXTURES enter in the crankcase.When piston descends, mixture in the crankcase compresses a little, the transfer port or the overflow conduit that make piston-top surface open in the cylinder body just can make compressed mixture enter in the cylinder body through the transfer port of piston top, and described transfer port or overflow conduit are connected crankcase with cylinder body.
In the two stroke engine of fan scavenging, fan can increase cost.Yet when the transfer port between cancellation cylinder body and the crankcase, bent axle can be lubricated and do not exist the oil of crankcase to form the danger of its path in cylinder body with oil immersed type.In the motor of comparatively cheap crankcase scavenging, lubricant oil mixes with gasoline, or drips shape ground to each lubricating point fuel feeding with small-sized lubricating pump.The oil that enters crankcase is easy to enter cylinder body by transfer port, passes relief opening.
The shortcoming of general two stroke engine above-mentioned is:
(1) because crankcase and cylinder body are open communication, the combustion gas that burning generates can be corroded cylinder body and crankcase, and impurity can enter the cylinder body float chamber to working surface wearing and tearing and destruction, causes frequent maintenance and inspection.
(2) connecting rod and crankshaft and piston are and are rotationally connected, and cause the friction between piston and the cylinder body, and make that respectively being rotatedly connected between bent axle and connecting rod and piston and the connecting rod meet the place cross galling and damage.
(3) quantity of movable part is too much.
(4) be delivered to and make tractive force that connecting rod and bent axle be in the crank pin that is rotationally connected not point-blank, cause power loss.
Two-stroke spark ignition engine that can be for reference is the motor that adopts on the dog link crank mechanism.This motor is published in the paper of the David Kirk in international non-highway in 1985 and the power plant meeting special edition " the SAE technical paper collects 851518 ", and in 9-12 day in September, 1985 in Meccah of the U.S. (Mecca), close and fertile base (Milwaukee), winconsin (Wisconsin) put on display.
In this piece paper, relate to a kind of two-stroke spark ignition engine of wanting to be used for the light airplane advancing means.Adopt and a kind ofly obtain a kind of four cylinder diameters of compact structure to the motor of arranging through improved dog link crank mechanism and two rectangular each other reciprocating compostle members.This general scotch yoke mechanism of narrating in above-mentioned document comprises two piston rods that the identical tubulose of whole wheel is housed, and this bar is connected with yoke by screw, can front-rear reciprocation movement.Bent axle is connected as being the roller that is slidingly mounted on the yoke with slide block, and rotatable.The to-and-fro motion of piston rod is rotated the bent axle in the crankcase.The Kirk motor has a single magneto and direct auxiliary end driving by bent axle in its exterior arrangement.
The patent us3617652 of U.S. VN AlbertsoN that can be for reference has also introduced the form of various scotch yoke mechanism.But this mechanism is based on above-mentioned basic principle.Narrated in the Kirk reference that U.S. Pat 981995,1181892,2122676,2122677,2172670,2147666,4013048,4331108 and F.P. FR595404 also mention in front, but can not think related to the present invention.The U. S. Patent 4013048 of the Reitz of the reference of mentioning in front is the most significant data, and is a kind of through improved scotch crank mechanism because it has been introduced.
Yet, there is a requirement all the time for two stroke engine based on scotch crank principle, can be applicable in single piston and the cylinder apparatus that it is the most effective for the lawn mower engine that needs the manpower traction to start usually.But as mentioned above, the manufacturing of most of lawn mower engine is based on the structure of the float chamber scavenging of fan scavenging as top said consequential shortcoming always.
Task of the present invention provides a kind of through improved two stroke IC engine, and it has reduced the shortcoming of existing technologies above-mentioned.
Motor of the present invention includes:
(a) single-piston cylinder body,
(b) transfer port,
(c) suction port that is disposed in the cylinder body,
(d) relief opening that is disposed in the cylinder body,
(e) piston that is installed in the cylinder body,
(f) one with piston all-in-one-piece or the connecting rod that becomes alternate manner to rigidly fix with piston,
(g) one be installed on the piston/cylinder adjacency but be the crankcase that separates of sealing each other,
(h) bent axle that is disposed in the crankcase,
(i) in the rotatable connection that can make bent axle be easy in crankcase, rotate between the crankshaft-and-connecting-rod,
(i) be installed in the interior electric ignition device of crankcase.
Two stroke engine of the present invention is particularly to a kind of improvement of aforesaid scotch crank scheme to prior art, not the configuration opposed pistons but adopt the piston joint of a single-piston cylinder body and associated that this piston joint links to each other with bent axle by aforementioned rotatable connection in the piston/cylinder of connection.
Piston/cylinder has corresponding continuous sidewall, diapire and roof.This piston/cylinder is columniform, and the shape of its cross section can adopt arbitrary other respective shapes, as rectangle or polygonal.Piston/cylinder preferably has the cooling unit related with it.Piston/cylinder has corresponding ignition mechanism, as be installed in the spark plug in the apical pore by general fashion.
The sidewall of piston/cylinder also corresponding configuration has suction port and relief opening, and suction port is under relief opening.
The shape of cross section and the piston/cylinder of piston are similar, and just like the seal arrangement that is contained in outer surface of piston catching groove inner seal ring and so on, piston-top surface and bottom surface are separated sealing so that resemble known in the art.
A transfer port is arranged in the piston/cylinder, and it makes liquid or gas be easy to be passed on the piston-top surface under the piston bottom surface.In a kind of pattern, it can be an overflow conduit or similar tube passage, and conduit or passage are to link to each other with the sidewall of piston/cylinder.
Yet in an alternative embodiment, transfer port can be configured in the piston that has check valve, as has in the piston of the ball valve of spring load or safety check.
Connecting rod and piston can become whole or become to be rigidly connected, and the motion of assembly parts that makes it connecting rod and piston is as same device.The corresponding device that is rigidly connected of usefulness can be rivet, screw and nut or analog for this purpose.
The diapire of the piston/cylinder of crossing as above mentioned makes piston/cylinder inside and crankcase inside separate sealing.
The positioning hole of corresponding configuration makes connecting rod reciprocating on the diapire.
Crankcase can have any corresponding shape, as cylindrical or rectangular.Crankcase is furnished with corresponding preferably starting arrangement, as has the rotor plate that the drag rope of one or more rotary pawls with rotating auxiliary device is connected known to resembling in the prior art is connected.Alternative plan is to adopt the starter motor device that has flywheel.
The mounting plate of crankcase is connected with the bottom surface with connecting hole, makes it to connect with the supporting frame of above-mentioned respective fixation or shifter.Crankcase can dispose a servo-actuated sleeve pipe, and with supporting or location live axle, this live axle is integral with bent axle or becomes to be rigidly connected.As prior art, live axle can have gearing.The external freedom end of this live axle can resemble and make the blade-shaped support plate of mowing machine coupled the prior art.
Rotating coupling arrangement comprises that one becomes rigidly connected support or bearing with the connecting rod all-in-one-piece or by any corresponding rigid joint device such as nuts and bolt, rivet or analog with connecting rod.The seat part can be screwed in the fixed hole of bearing, and connecting rod can be screwed in the present part.
Be installed in support or the bearing can be can fixed hole in to-and-fro motion and be slide block or the cylinder that is slidingly installed.The material of this slide block should have suitable friction material, as plastics or DELRIN.What be connected with slide block can be to be integral with bent axle or to become rigidly connected crank pin, and is fixed on the appropriate location with a spring washer.Crank pin can resemble and be connected with starting arrangement the above-mentioned mode.
Bent axle can have arbitrary corresponding shape, as has the solid disk of the weight balancing device that can make rotatable coupling arrangement, and this balancing device can be and circumferential notch, groove or the opening of rotatable coupling arrangement near configuration.
If desired, bent axle can also dispose a magnet, and this magnet is in the fixed groove that is arranged on bent axle by the joining plate of dismountable corresponding coupling arrangement such as screw or slide block.
Crankcase can also have ignition mechanism, and this ignition mechanism becomes to removably connect with the internal surface of crankcase by a corresponding support.Electric ignition device is electrically and is connected with spark plug, like this, when electric ignition device and spark plug become to electrically connect the magnet that makes on the bent axle with the electric ignition device conducting, will induce the electric current that flows to spark plug, so that lights the interior combustion gas of cylinder body when needing.Light the combustion gas in the cylinder body when being its limit that moves upward of piston arrives.
Referring now at the most preferred embodiment of the present invention shown in the following accompanying drawing:
Fig. 1 is the perspective view of the two stroke engine of formation according to the present invention.
Fig. 2 is equipped with the perspective view of the mowing machine of two stroke engine as shown in Figure 1.
Fig. 3 is each stage view of expression two stroke engine work cycle shown in Figure 1.
Fig. 4 is the perspective exploded view of two stroke engine shown in Figure 1.
Fig. 5 is according to the present invention and in conjunction with the embodiments and the perspective exploded view of the two stroke engine that constitutes.
But Fig. 6 is the sectional drawing of bearing device that is used to install the electric ignition device of its bearing device axial motion.
Fig. 7 and Fig. 8 are the reduction valve views that is suitable for being configured in piston head, and when reduction valve was opened, gas flowed to piston/cylinder chamber below the piston by reduction valve inlet.
Fig. 9 is of the present invention through improved reduction valve view.
Figure 10 to Figure 13 is the various structures along the valve member of the present invention's employing of Fig. 7 line A-A.
The mowing machine 35 that motor 10 is housed has by the chassis 36 of ground contact wheel 37 supportings, handle 38, cross member 39 and 40 and rear portion trap 41.Tow start actuator 42 is connected with crank pin 28 in a manner described.Operating handle 43 shown in the figure can make handle 38 relative cross members 40 pivot the purpose that realizes conveying, and fuel oil control unit 44 is contained on the handle 38.
Fig. 3 shows the job order of motor operation among Fig. 1.In Fig. 3 (A), the magnet 45 that is contained on the bent axle 29 is connected with electric ignition device 33, makes electric current flow to spark plug 21 through cable 34A, causes the air of piston 22 tops and the mixture burns of gasoline, and piston 22 is thereupon by such downward promotion shown in Fig. 3 (B).In Fig. 3 (A), gas can enter piston/cylinder 11 through suction port 14, and when piston 22 descended as shown in Fig. 3 (B), it was with the mixed gas in the piston/cylinder 11 below the compression piston 22, and relief opening 15 is opened, and discharges combustion gas.
In Fig. 3 (C), transfer port 46 is opened, and gas can flow to from below in the piston/cylinder 11 of piston 22 tops, and combustion gas still can be discharged through relief opening 15.When piston 22 was pressed Fig. 3 (D) rising, relief opening 15 and transfer port 46 were closed, and gas is compressed above piston 22.Crankcase 25 separates sealing by end wall 17 and piston/cylinder 11, thus slide block 27 can by with the free to-and-fro motion before and after doing in the support 26 of acting on of support 26 rigidly connected connecting rods 23.Crank pin 28 is rigidly connected for 29 one-tenth with the bent axle that rotates with slide block 27, and the magnet 45 on the bent axle 29 makes shown in Fig. 3 (A) and like that the gas of piston 22 tops lighted.Reduction valve 29A shown in the figure is described in more detail below.
In decomposition view shown in Figure 4, the catching groove 47 on the piston 22 is as disposing seal ring 48 usefulness.Connecting rod 23 is connected with split circlip 50 in fitting seat 49, and connecting rod 23 threaded end 50A are contained in the matching hole 51 of mounting bracket 26, and hole 51 wherein is arranged in the boss 52.Electric igniting element 34 is the internal surfaces that are contained in crankcase 25 by the screw 54 that is connected with fixed support 53.
In another embodiment of the present invention, electric ignition device can from as shown in Figure 3A by with respect to the position movement of top dead center leading or lag position.Corresponding leading position can be 35 ° of budc, and corresponding lag position can be 5 ° of atdc.These numerical value are being represented the spark ignitor scope of oil inflame thereupon.
In realizing a kind of structure of this purpose, for can realize as described above leading or the position of hysteresis, electric ignition device is movably.This is favourable to starting between the performance race of engine and that take a turn for the better.Therefore, in some cases, it is useful that electric ignition device moves to a certain leading position from a certain lag position.Electric ignition device can place lag position earlier and move to significantly high leading position of power when engine start.For this point, because lower resistance to compression pression and burning faster, so motor is more easy in the lag position starting.
This embodiment is shown in Fig. 5 to 6,
The sidewall of piston/cylinder 11A has cooling fin 13A and relief opening 15A, and suction port is blocked by view.The antetheca 16A of piston/cylinder 11A disposes cooling fin 20A, and dress spark plug 21 in the 21A of hole, piston 22A can be the sliding type to-and-fro motion and connecting rod 23A with its one is arranged in cylinder body 11A.Crankcase 25A surrounds mounting bracket 26A, and this mounting bracket 26A becomes to be rigidly connected with connecting rod 23A, and the screwed end 50A of connecting rod 23A is connected with the matching hole 51A of support 26A and passes fitting seat 49.Support 26A has a groove 26B, and crank pin 28 becomes sliding joining in groove 26B.Bent axle 29A becomes overall structure with live axle 3A, the cable 34B connection that is connected with spark plug 21 by an end of the electric ignition device of control unit 34A control, catching groove 47A on the piston 22A is a dress seal ring 48, magnet 45 is by attaching clamp 57 location, dispose trim groove 60A on the bent axle 29A, drum-shape slide block 27A is contained on the erection column 61A, and axle 32A disposes otch 62A that can be connected with leaf type mounting plate (not shown) and the hole 63A that passes crankcase 25A.
In the above-described embodiment, assembling set 64 is that power supply ignition mechanism 33A installs usefulness.This assembling set 64 comprise annular portion 65 with have can supply terminals device 33A install and be connected lug 66 with connecting hole 67, with screw 54A that ignition mechanism 33A and lug 66 is fixing, screw 54A can pass the matching hole 53A of ignition mechanism 33A and ledge portion 53B, and cable 68 is connected with each other assembling set 64 and Carburetor and assembling set 64 is rotated.
In Fig. 7 and Fig. 8, show a kind of reduction valve 69 of corresponding construction form, this reduction valve can be arranged in the roof 70 of piston 22 or 22A.Valve 69 comprises movably valve member 71 and an annular valve head 72.The valve rod 73 of annular cross section can be reciprocating and be slidingly matched in valve opening 74, valve rod 73 contacts with support rib 75.The spring 76 at 74 ends of valve opening is fixed wherein by circlip 77.Also show hollow space 78 and the piston rod 79 of piston 22 or 22A among this figure.
During work, the spring action of lower dead center was not opened when valve 69 was not worked because of motor 10, and the piston that arrives top dead center during because of piston 22 or the internal pressure of combustion chamber rising of 22A top is closed it.When valve cuts out, engine ignition, the pressure in igniting back piston 22 or the 22A firing chamber, top raises rapidly, utilizes the pressure in the firing chamber to make valve 69 maintenance closed conditions greater than the restoring force of spring 76.When valve 69 was opened, gas can be from the chamber of chamber below relief opening 80 enters piston of piston 22 or 22A top, shown in the arrow of Fig. 8.Fig. 7 represents that valve is in pent position.
Yet, valve 69 can be closed during except above-mentioned engine start, in downward stroke, as piston 22 or 22A during near lower dead center, because gas can be delivered to the chamber of piston top through transfer port 46, the zone of drawing into vacuum or pressure being reduced, thus make valve 69 keep closing.Up stroke is during near top dead center, and valve can keep resembling top closed condition described.
In Fig. 9, show a kind ofly through improved reduction valve 81, valve member 71 wherein is connected with piston 82.This reduction valve 81 also comprises a vacuum hole 83, and valve 81 is not opened when motor 10 is not worked.
When engine start brought into operation with the traction stroke, the pressure of piston 22 or 22A below chamber can be kept valve 81 and open.As piston 22 or 22A during by lower dead center, the chamber pressure of piston 22 belows reduces, and valve 81 is discharged through vacuum hole 83 because of gas close valve.As piston 22 or 22A during near top dead center, the pressure of piston top chamber can make valve 81 keep closing.
The principal advantages that piston 22 or 22A roof are equipped with reduction valve is: when reduction valve is shown in an open position, for the gas in the chamber of piston top provides the passage that flows into the below chamber.This means that the pressure of top chamber can reduce greatly, make motor be easy to starting.Can put letter top chamber pressure and can effectively reduce 40%.So, for general two stroke engine, the pressure of top chamber is generally 130～150 pounds/inch
2For the two stroke engine that constitutes by the present invention, this pressure can reduce about 70～90 pounds/inch
2
The form of the various ports of chamber below the air that has schematically illustrated chamber above making in Figure 10 to Figure 13 flows into.Figure 10 represents that valve rod 73A passes the guiding element 84 with port 85 and 86.Figure 11 represents that valve rod 73B passes guiding element 87 or guiding rib 87, so as to port 88 is provided.Figure 12 represents that guiding element 84 and port 90 are round valve rod 73C.Figure 13 represents that guiding element 91 is round the valve rod 73D that has port 92.
As follows with the advantage that resembles the shown two stroke engine of most preferred embodiment by two stroke engine of the present invention:
(ⅰ) can reduce significantly the friction of piston/cylinder. Because piston can have uniform speed in the cylinder body, the speed that can eliminate like this piston motion terminals increases, and the increase of this kind speed exists in the prior art. Therefore, this kind engine speed of gyration that can turn round under lower temperature and represent with revolutions per second is higher.
(ⅱ) bent axle can be used lighter material such as aluminium manufacturing, alleviating weight, and has used the internal electrical igniter in crankcase.
(ⅲ) bent axle oil can be sealed, because oil does not have passage at bent axle.
(ⅳ) because piston and connecting rod are the one-piece unit all-in-one-pieces, circlip and the sclerosis of some machineries and the needs of grinding process to piston pin, supporting have been eliminated.
(ⅴ) slide block can be used relatively light material such as DELRIN, to reduce weight, wearing and tearing and noise.
(ⅵ) as shown in Figure 4, whole engine device can be dismantled in the short time and assemble.
(ⅶ) piston/cylinder has big efficient and the littler inner cavity chamber of volume.
(ⅷ) this engine is easy to adopt the inside decompression device that can be installed in the piston.
The power or the impact that (ⅸ) act on crank-pin are linearly, thereby most of power can pass to crank-pin.
(ⅹ) employing of slide block and mounting bracket has reduced inertia stress.
(ⅹ ⅰ) reduced the number of components of engine.
(ⅹ ⅱ) according to above-mentioned advantage (ⅰ), piston/cylinder or cylinder can be used the aluminium manufacturing, thereby have alleviated whole weight.
(ⅹ ⅲ) slide block itself can be adjusted, thus the noise that reduces even in the engine scuffing situation, work.
(ⅹ ⅳ) crankcase separates with piston/cylinder, thereby has reduced the corrosiveness of combustion gas.
(ⅹ ⅴ) makes the easy to manufacture of engine because machining amount is few, and cost is lower.
(ⅹ ⅵ) engine has multifunctionality, requires the occasion of little h type engine h all applicable.
(ⅹ ⅶ) according to circumstances, this engine can mate mutually with existing or new hay mover.
Claims (17)
1, a kind of two stroke engine, it comprises:
(a) single-piston cylinder body,
(b) transfer port,
(c) suction port that is disposed in the cylinder body,
(d) relief opening that is disposed in the cylinder body,
(e) piston that is installed in the cylinder body,
(f) one becomes the rigidly connected connecting rod of other modes with the piston all-in-one-piece or with piston,
(g) one be installed on piston/cylinder in abutting connection with but separate each other the sealing crankcase,
(h) bent axle that is disposed in the crankcase,
(i) rotatable connecting apparatus that the bent axle in the crankcase is rotated,
(j) be installed in the interior electric ignition device of crankcase.
2, two stroke engine according to claim 1, wherein piston/cylinder has a diapire, and this diapire makes the inside of piston/cylinder and the inside of crankcase separate sealing.
3, two stroke engine according to claim 1 and 2, wherein rotatable connection comprises that one is integral with connecting rod or becomes rigidly connected mounting bracket or bearing, and disposes that an energy is reciprocating in mounting bracket or bearing to be sliding slide block or cylinder of joining.
4, two stroke engine according to claim 3, wherein mounting bracket or bearing have one with the bent axle all-in-one-piece or become rigidly connected crank pin.
5,, wherein dispose the magnet that when its conducting, can make the electric ignition device ignition engine on the bent axle according to the described two stroke engine of above-mentioned arbitrary claim.
6, according to the described two stroke engine of above-mentioned arbitrary claim, wherein electric ignition device is fixedly mounted on the internal surface of crankcase.
7, according to claim 1 to 5 each described two stroke engine wherein, wherein electric ignition device can move to the leading of top dead center or a certain position of hysteresis in crankcase.
8, two stroke engine according to claim 7, wherein the leading position can reach 35 ° of budc, and lag position can reach 5 ° of atdc.
9, according to claim 7 or 8 described two stroke engines, wherein electric ignition device is installed on the assembling set, and this assembling set can rotate in crankcase selectively, to reach leading position or lag position.
10,, wherein dispose a reduction valve that makes motor be easy to start at the top of piston according to the described two stroke engine of above-mentioned arbitrary claim.
11, two stroke engine according to claim 10, wherein reduction valve comprises a valve member that can move in a matching hole of piston, when valve was shown in an open position, the gas that the piston/cylinder chamber above piston comes out can flow into the chamber of the cylinder body of piston below.
12, two stroke engine according to claim 11, wherein the sidewall of matching hole has a relief opening that makes described gas flow.
13, according to claim 11 or 12 described two stroke engines, wherein valve member is to be offset to the position of opening by a pressure spring or other elastic element.
14, two stroke engine according to claim 12, wherein reduction valve is in work under the vacuum state, and a vacuum hole is arranged on the sidewall of matching hole, and there is a piston described valve member bottom.
15, according to each described two stroke engine of claim 10 to 14, wherein valve member be suitable for matching hole in one or more guiding elements become supporting to contact.
16, two stroke engine according to claim 15, wherein guiding element has one or more holes that enter.
17, a kind of basically with the described two stroke engine of reference accompanying drawing.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU514486 | 1986-03-21 | ||
| AUPH5144 | 1986-03-21 | ||
| AUPH8964 | 1986-11-14 | ||
| AU896486 | 1986-11-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87102814A true CN87102814A (en) | 1987-10-07 |
Family
ID=25611112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87102814 Pending CN87102814A (en) | 1986-03-21 | 1987-03-21 | A kind of two stroke engine |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN87102814A (en) |
| IL (1) | IL81958A0 (en) |
| NO (1) | NO871130L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104663110A (en) * | 2014-12-03 | 2015-06-03 | 宁波大叶园林设备有限公司 | Lawn mower with engine with LPG (liquid propane gas) fuel tank unit and production method of LPG fuel tank unit |
-
1987
- 1987-03-19 NO NO871130A patent/NO871130L/en unknown
- 1987-03-21 CN CN 87102814 patent/CN87102814A/en active Pending
- 1987-03-22 IL IL81958A patent/IL81958A0/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104663110A (en) * | 2014-12-03 | 2015-06-03 | 宁波大叶园林设备有限公司 | Lawn mower with engine with LPG (liquid propane gas) fuel tank unit and production method of LPG fuel tank unit |
Also Published As
| Publication number | Publication date |
|---|---|
| NO871130L (en) | 1987-09-22 |
| NO871130D0 (en) | 1987-03-19 |
| IL81958A0 (en) | 1987-10-20 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |