CN103790690B - A kind of gasoline engine - Google Patents
A kind of gasoline engine Download PDFInfo
- Publication number
- CN103790690B CN103790690B CN201410059826.5A CN201410059826A CN103790690B CN 103790690 B CN103790690 B CN 103790690B CN 201410059826 A CN201410059826 A CN 201410059826A CN 103790690 B CN103790690 B CN 103790690B
- Authority
- CN
- China
- Prior art keywords
- air belt
- scavenging air
- scavenging
- crankcase
- port
- 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.)
- Active
Links
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
- Supercharger (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a kind of gasoline engine, belong to internal-combustion piston engine field, including having the cylinder block in cylinder chamber and there is the crankcase of crankshaft room, cylinder block is located at the top of crankcase, the inwall of cylinder block is provided with air inlet, steam vent, it is additionally provided with enclosed scavenging air belt group, cylinder chamber is connected by scavenging air belt group with crankshaft room, scavenging air belt group includes the first scavenging air belt and the second scavenging air belt, first scavenging air belt and the second scavenging air belt form the first scavenging port on the inwall of cylinder block respectively, second scavenging port, first scavenging air belt and the second scavenging air belt form the first gas port on the inwall of crankcase respectively, second gas port, first scavenging port is with respect to the second scavenging port closer to steam vent, second gas port is located at the bottom of crankcase, first gas port is higher than the second gas port.Separate dilute, rich mixture, the waste gas after burning is expelled by lean mixture from steam vent, reduces the harmful components in fuel loss and tail gas, the thermal efficiency improves 20%～30%.
Description
Technical field
The present invention relates to internal-combustion piston engine field, in particular to a kind of gasoline engine.
Background technology
The operation principle of two stroke gasoline engine typically now is as follows：Piston stroking upward, steam vent and scavenging port are closed, and open
Gaseous mixture in beginning compression cylinder；Piston stroking upward is opened to air inlet, and incoming mixture sucks crankcase；When piston will reach
During top dead centre, plug ignition burns；Because after plug ignition lights gaseous mixture, promote descent of piston acting；Because piston
Descending, the gaseous mixture in crankcase is compressed, and now the check valve sheet before air inlet is automatically switched off, the gas quilt in crankcase
Precommpression；When piston will reach lower dead center, steam vent is opened, and starts aerofluxuss, the precompressed mixing in crankcase simultaneously
Gas enters cylinder through scavenging port, waste gas is discharged from steam vent, completes scavenging process.
So using the fresh gaseous mixture without burning, the waste gas after gas in-cylinder combustion is expelled, resulted in this
In gaseous mixture, denseer gaseous mixture is also together discharged with waste gas without burning, and not only fuel loss is larger, and in emission
Harmful gass content higher.
Content of the invention
It is an object of the invention to provide a kind of gasoline engine, to solve existing two stroke gasoline engine due to using fresh
Gaseous mixture by after gas in-cylinder combustion waste gas extrude, cause denseer gaseous mixture also together with waste gas discharge, fuel loss
Larger problem.
The technical solution used in the present invention is：A kind of gasoline engine, including having the cylinder block in cylinder chamber and have crankshaft room
Crankcase, described cylinder block is located at the top of described crankcase, and the inwall of described cylinder block is provided with air inlet, steam vent, also
It is provided with enclosed scavenging air belt group, described cylinder chamber is connected by described scavenging air belt group with described crankshaft room, described scavenging air belt group bag
Include the first scavenging air belt and the second scavenging air belt, described first scavenging air belt and described second scavenging air belt divide on the inwall of described cylinder block
Do not form the first scavenging port, the second scavenging port, described first scavenging air belt and described second scavenging air belt are in the inwall of described crankcase
Upper form the first gas port, the second gas port respectively, described first scavenging port is with respect to described second scavenging port closer to described
Steam vent, described second gas port is located at the bottom of described crankcase, and described first gas port is higher than described second gas port, institute
State and arrange fluted on the inwall of crankcase, described groove is located at the top of described first gas port, the notch of described groove by
The direction of described cylinder block tilts to the direction of described crankcase, and the minimum point of the notch of described groove deviates described first air flue
Mouthful.
Cylinder chamber is connected by scavenging air belt group with crankshaft room, and that is, a scavenging air belt group part is located in cylinder body, and a part is located at song
In axle box.Cylinder chamber is located at the combustor on cylinder block inner carrier top, and the crankcase that crankshaft room is located at piston lower portion is internal empty
Between, the indoor gaseous mixture of bent axle is squeezed into by scavenging air belt group by cylinder chamber by moving down of piston.Gasoline engine is in operating
When, the gaseous mixture in crankcase is with the direction of rotation rotational flow of bent axle, thus in crankcase, the liquid of part atomization is fired
Material centrifugation do or gravity in the presence of, drop is attached on the inwall of crankcase, ultimately forms wall flow, wall flow is along song
The inwall of axle box flows to the bottom of crankcase, that is, focus on the position of the second gas port, so under high pressure from the second gas port
The gaseous mixture entering the second scavenging air belt is denseer gaseous mixture, the drop containing substantial amounts of wall flow surface；From positioned at eminence
The gaseous mixture that first gas port enters the first scavenging air belt is diluter gaseous mixture, thus forming dense, dilute detached mixed platform gas, makes
Dense, lean mixture passes through the second separate scavenging air belt respectively, the first scavenging air belt enters cylinder chamber.Enter from the second scavenging port
Rich mixture is trapped near the piston-top surface of steam vent offside, enters the dilute of cylinder intracavity from the first scavenging port near steam vent
Gaseous mixture covers rich mixture, and lean mixture is located at steam vent and nearby the waste gas after burning is expelled from steam vent,
Realize stratiform scavenging, greatly reduce the escape of rich mixture, reduce the content of harmful components in fuel loss and tail gas, reach
To reducing oil consumption, improve the purpose of discharge.Can also by the appropriate design to the first gas port or the shape of the second gas port,
Preferably separate dense, lean mixture.
So setting groove both can collect wall flow, can prevent the wall flow flowing down above the first gas port from flowing into first again
Gas port and lead to increased the concentration of the lean mixture in the first scavenging air belt, make the inwall of the crankcase above the first gas port
The wall flow being flowed down is collected by groove, and then is flowed out groove, flowed to crankcase by the minimum point of the notch of groove
Bottom, that is, wall flow all focus on the position of the second gas port, thus further enhancing the concentration of dense, dilute mixed platform gas
Difference, preferably separates dense, lean mixture, further reduces the escape of rich mixture.
Further, described scavenging air belt group is two groups, and described in two groups, scavenging air belt group is symmetrically set.Make in cylinder body
Assume good scavenging distribution character, preferably ensure the performance of whole machine.
Further, the described scavenging air belt group in described cylinder block is cylinder body scavenging air belt group, positioned at described cylinder block
On described first scavenging air belt, described second scavenging air belt be respectively the first cylinder body scavenging air belt, the second cylinder body scavenging air belt, described cylinder body
Scavenging air belt group is provided with partition wall, and described first cylinder body scavenging air belt and described second cylinder body scavenging air belt are by described divider walls
Become, the outer wall of described cylinder block is provided with the opening being communicated with described cylinder body scavenging air belt group, is provided with cylinder body end at described opening
Lid.Structure is simple, practical, compared with the structure of existing enclosed scavenging air belt, reduces complex degree of structure and one-tenth
Type difficulty.
Further, the described scavenging air belt group on described crankcase is casing scavenging air belt group, positioned at described crankcase
On described first scavenging air belt, described second scavenging air belt be respectively the first casing scavenging air belt, the second casing scavenging air belt, described first
The first housing plate that casing scavenging air belt includes the first groove opening up on described crankcase and closes described first groove, institute
State the second casing scavenging air belt and the second groove opening up and the second casing closing described second groove are included on described crankcase
End cap.Make casing scavenging air belt composing type on the groove and end cap on crankcase, realize the closing of scavenging air belt group, can substantially reduce
Technology difficulty.
The invention has the beneficial effects as follows, include the scavenging air belt group of two scavenging air belts by setting, so that the second gas port is located at
The bottom of crankcase, the first gas port is higher than the second gas port, thus separating dilute, the rich mixture in crankcase, and leads to respectively
Cross each independent scavenging port and flow into cylinder intracavity, the second scavenging air belt near air inlet side for the rich mixture, lean mixture is with leaning on
First scavenging air belt of nearly aerofluxuss side, the waste gas after burning is expelled by lean mixture from steam vent, thus realize stratiform sweeping
Gas, greatly reduces the escape of rich mixture, reduces the content of harmful components in fuel loss and tail gas, reduces oil
Consumption, improves the purpose of discharge.Cost not only will not be increased, and the raising due to charging efficiency, so that power is increased, the thermal efficiency carries
High by 20%～30%, improve economic performance.
Brief description
Fig. 1 is the sectional view of the gasoline engine that first embodiment of the invention provides；
Fig. 2 is the schematic diagram of the scavenging air belt group of gasoline engine that first embodiment of the invention provides；
Fig. 3 is the overall schematic of the gasoline engine that second embodiment of the invention provides；
Fig. 4 is the sectional view of the gasoline engine that second embodiment of the invention provides；
Fig. 5 is the schematic diagram of the scavenging air belt group of gasoline engine that second embodiment of the invention provides.
Specific embodiment
Below by specific embodiment and combine accompanying drawing the present invention is described in further detail.
Fig. 1, Fig. 2 show the gasoline engine that first embodiment of the invention provides, including the cylinder block 101 with cylinder chamber and tool
There is the crankcase 102 of crankshaft room, cylinder block 101 is located at the top of crankcase 102, the inwall of cylinder block 101 is provided with air inlet
103rd, steam vent 104, are additionally provided with enclosed scavenging air belt group, and cylinder chamber is connected by scavenging air belt group with crankshaft room, scavenging air belt group bag
Include the first scavenging air belt 111 and the second scavenging air belt 121, the first scavenging air belt 111 and the second scavenging air belt 121 are in the inwall of cylinder block 101
Upper form the first scavenging port 112, the second scavenging port 122 respectively, the first scavenging air belt 111 and the second scavenging air belt 121 are in crankcase 102
Inwall on form the first gas port 113, the second gas port 123 respectively, the first scavenging port 112 is with respect to the second scavenging port 122
Closer to steam vent 104, the second gas port 123 is located at the bottom of crankcase 102, and the first gas port 113 is higher than the second gas port
123.
In the running, gaseous mixture in crankcase 102 is with the direction of rotation rotational flow of bent axle for gasoline engine, thus bent axle
In case 102 part atomization liquid fuel centrifugation do or gravity in the presence of, drop is attached to the inwall of crankcase 102
On, ultimately form wall flow, wall flow flows to the bottom of crankcase 102 along the inwall of crankcase, that is, focus on the second air flue
Mouthfuls 123 position, so entering the gaseous mixture of the second scavenging air belt 121 from the second gas port 123 under high pressure is denseer mixing
Gas, the drop containing substantial amounts of wall flow surface；Enter the mixed of the first scavenging air belt 111 from the first gas port 113 positioned at eminence
Closing gas is diluter gaseous mixture, thus forming dense, dilute detached mixed platform gas, makes dense, lean mixture respectively by separate
Second scavenging air belt 121, the first scavenging air belt 111 enter cylinder chamber.
The rich mixture entering from the second scavenging port 122 is trapped near the piston-top surface of steam vent 104 offside, from close
The lean mixture that first scavenging port 112 of steam vent 104 enters cylinder intracavity covers rich mixture, and lean mixture is located at aerofluxuss
Waste gas after burning is nearby expelled by hole 104 from steam vent 104, realizes stratiform scavenging, greatly reduces rich mixture
Escape, reduce the content of harmful components in fuel loss and tail gas, reduce oil consumption, improve the purpose of discharge.
Fig. 3 to Fig. 5 shows the gasoline engine that second embodiment of the invention provides, including cylinder block 101 He with cylinder chamber
There is the crankcase 102 of crankshaft room, cylinder block 101 is located at the top of crankcase 102, the inwall of cylinder block 101 is provided with air inlet
Hole 103, steam vent 104, are additionally provided with enclosed scavenging air belt group, and cylinder chamber is connected by scavenging air belt group with crankshaft room, scavenging air belt group
Including the first scavenging air belt 111 and the second scavenging air belt 121, the first scavenging air belt 111 and the second scavenging air belt 121 are in cylinder block 101
First scavenging port 112, the second scavenging port 122 are formed on wall, the first scavenging air belt 111 and the second scavenging air belt 121 are in crankcase respectively
First gas port 113, the second gas port 123 are formed on 102 inwall, the first scavenging port 112 is with respect to the second scavenging port respectively
122 closer to steam vent 104, and the second gas port 123 is located at the bottom of crankcase 102, and the first gas port 113 is higher than the second air flue
Mouth 123.
In the present embodiment, the inwall of crankcase 102 is arranged fluted 105, groove 105 is located at the first gas port 113
Top, the notch of groove 105 tilts from the direction of cylinder block 101 to the direction of crankcase 102, and the notch of groove 105 is
Low spot deviates the first gas port 113.Scavenging air belt group in cylinder block 101 is cylinder body scavenging air belt group, in cylinder block 101
The first scavenging air belt 111, the second scavenging air belt 121 be respectively the first cylinder body scavenging air belt, the second cylinder body scavenging air belt, cylinder body scavenging air belt group
It is provided with partition wall 106, the first cylinder body scavenging air belt and the second cylinder body scavenging air belt are separated by partition wall 106, cylinder block 101
Outer wall is provided with the opening 131 communicating with cylinder body scavenging air belt group, is provided with cylinder end caps 132 at opening 131.Positioned at crankcase
Scavenging air belt group on 102 is casing scavenging air belt group, the first scavenging air belt 111 on crankcase 102,121 points of the second scavenging air belt
Not Wei the first casing scavenging air belt, the second casing scavenging air belt, the first casing scavenging air belt includes the first ditch opening up on crankcase 102
Groove 133 and the first housing plate 134 of closing first groove 133, the second casing scavenging air belt include opening up on crankcase the
Two grooves 135 and the second housing plate 136 of closing second groove 135.First groove 133, the lower end difference of second groove 135
Communicate with the first gas port 113, the second gas port 123.First groove 133 and second groove 135 all in arc-shaped, positioned at bent axle
The both sides of the crankshaft hole of case 102, form air flue, take full advantage of the body structure of crankcase 102.
In order that assuming good scavenging distribution character in cylinder block 101, preferably ensure the performance of whole machine, scavenging air belt group
For two groups, and two groups of scavenging air belt groups are symmetrically set, thus, the first cylinder body scavenging air belt, the second cylinder body scavenging air belt and first
Casing scavenging air belt, the second casing scavenging air belt are respectively two, and accordingly in the two ends of cylinder block 101 and crankcase 102
Two ends be symmetrical arranged, that is, opening 131 and corresponding cylinder end caps 132 are two, positioned at the two ends of cylinder block, first groove
133 and second groove 135 and the first housing plate 134, the second housing plate 136 be respectively two, positioned at crankcase 102
Two ends, that is, at the crankshaft hole at crankcase 102 two ends.The structure of so scavenging air belt group is simpler, practical, and existing
The structure of enclosed scavenging air belt is compared, and reduces complex degree of structure and molding difficulty, casing scavenging air belt composing type is in bent axle
On groove and end cap on case 102, realize the closing of scavenging air belt group, greatly reduce technology difficulty.
Groove 105 in the present embodiment both can collect wall flow, can prevent the wall flowing down above the first gas port 113 again
Stream flows into the first gas port 113 and leads to increased the concentration of the lean mixture in the first scavenging air belt 111, makes the first gas port
The wall flow that the inwall of the crankcase 102 of 113 tops is flowed down is collected by groove 105, and then by the groove of groove 105
The minimum point of mouth flows out groove 105, flows to the bottom of crankcase 102, and that is, wall flow all focuses on the position of the second gas port 123
Put, thus further enhancing the concentration difference of dense, dilute mixed platform gas, preferably separating dense, lean mixture, further subtracting
Lack the escape of rich mixture.Not only cost will not be increased, and the thermal efficiency improves 20%～30%, improve economy
Energy.
In the present invention, on the groove and end cap that casing scavenging air belt group is not limited to be molded on crankcase, can also pass through
External trachea or be arranged on the modes such as the inside of crankcase and to realize；Equally, it is also not necessarily limited to by above the first gas port
Setting groove, to collect wall flow, prevents the wall flow flowing down above the first gas port from flowing into the first gas port and leading to reduce
The concentration difference of dense, dilute mixed platform gas, can also be by setting up boss in the first gas port or the first gas port being arranged to other
The modes such as shape come to prevent wall flow flow into the first gas port.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (3)
1. a kind of gasoline engine, including having the cylinder block in cylinder chamber and having the crankcase of crankshaft room, described cylinder block is located at described
The top of crankcase, the inwall of described cylinder block is provided with air inlet, steam vent, is additionally provided with enclosed scavenging air belt group, institute
State scavenging air belt group to connect described cylinder chamber with described crankshaft room, described scavenging air belt group includes the first scavenging air belt and the second scavenging air belt,
Described first scavenging air belt and described second scavenging air belt form the first scavenging port, the second scavenging on the inwall of described cylinder block respectively
Mouthful, described first scavenging air belt and described second scavenging air belt formed respectively on the inwall of described crankcase the first gas port, second
Gas port, with respect to described second scavenging port closer to described steam vent, described second gas port is located at described first scavenging port
The bottom of described crankcase, described first gas port is higher than described second gas port it is characterised in that the inwall of described crankcase
Upper setting is fluted, and described groove is located at the top of described first gas port, and the notch of described groove is by the side of described cylinder block
Tilt to the direction of described crankcase, the minimum point of the notch of described groove deviates described first gas port, described scavenging air belt
Organize as two groups, and described in two groups, scavenging air belt group is symmetrically set.
2. gasoline engine according to claim 1 is it is characterised in that the described scavenging air belt group being located in described cylinder block is cylinder
Body scavenging air belt group, described first scavenging air belt in described cylinder block, described second scavenging air belt are respectively the first cylinder body scavenging
Road, the second cylinder body scavenging air belt, described cylinder body scavenging air belt group is provided with partition wall, described first cylinder body scavenging air belt and described second cylinder
Body scavenging air belt is formed by described divider walls, and the outer wall of described cylinder block is provided with and opening that described cylinder body scavenging air belt group communicates
Mouthful, it is provided with cylinder end caps at described opening.
3. gasoline engine according to claim 1 is it is characterised in that the described scavenging air belt group being located on described crankcase is case
Body scavenging air belt group, described first scavenging air belt on described crankcase, described second scavenging air belt are respectively the first casing scavenging
Road, the second casing scavenging air belt, described first casing scavenging air belt includes the first groove opening up on described crankcase and closing institute
State the first housing plate of first groove, described second casing scavenging air belt include the second groove that opens up on described crankcase and
Close the second housing plate of described second groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059826.5A CN103790690B (en) | 2014-02-21 | 2014-02-21 | A kind of gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410059826.5A CN103790690B (en) | 2014-02-21 | 2014-02-21 | A kind of gasoline engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103790690A CN103790690A (en) | 2014-05-14 |
| CN103790690B true CN103790690B (en) | 2017-03-08 |
Family
ID=50666690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410059826.5A Active CN103790690B (en) | 2014-02-21 | 2014-02-21 | A kind of gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103790690B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104929797A (en) * | 2015-07-02 | 2015-09-23 | 浙江天泰机械有限公司 | Two-stroke engine cylinder and two-stroke engine |
| CN105863818B (en) * | 2016-05-25 | 2018-08-28 | 浙江三锋实业股份有限公司 | A kind of scavenging system of two stroke engine |
| EP3715599B1 (en) | 2019-03-25 | 2022-02-23 | Andreas Stihl AG & Co. KG | Two-stroke engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59226227A (en) * | 1983-06-04 | 1984-12-19 | Nippon Clean Engine Res | Two-cycle internal-combustion engine |
| JPS59213919A (en) * | 1983-05-19 | 1984-12-03 | Nippon Clean Engine Res | Stratified scavenging two-cycle internal-combustion engine |
| JPS60111019A (en) * | 1983-11-19 | 1985-06-17 | Nippon Clean Engine Res | Two-cycle internal-combustion engine |
| JPS61197712A (en) * | 1985-02-26 | 1986-09-02 | Nippon Clean Engine Res | 2-cycle laminar scavenging internal-combustion engine |
| AT399913B (en) * | 1985-05-10 | 1995-08-25 | Avl Verbrennungskraft Messtech | TWO-STROKE INTERNAL COMBUSTION ENGINE WITH REVOLUTION |
| CN203756313U (en) * | 2014-02-21 | 2014-08-06 | 浙江天泰机械有限公司 | Gasoline engine |
-
2014
- 2014-02-21 CN CN201410059826.5A patent/CN103790690B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103790690A (en) | 2014-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203783745U (en) | Layered-scavenging two-stroke gasoline engine cylinder body | |
| CN103321709B (en) | The lubrication system of four stroke engine | |
| CN104675507A (en) | Two-stroke engine with air leading type scavenging system | |
| CN103790690B (en) | A kind of gasoline engine | |
| US20060266310A1 (en) | Two-stroke internal combustion engine | |
| JP3723691B2 (en) | Air cleaner for stratified scavenging engine | |
| CN203756313U (en) | Gasoline engine | |
| CN201610778U (en) | Structure of air exchange device of engine | |
| CN201738985U (en) | Gas-oil separation device of engine | |
| CN1292155C (en) | Two stroke engine | |
| CN106523131B (en) | A kind of two-stroke internal combustion engine | |
| CN204610018U (en) | There is the two stroke engine of scavenging in air pilot mode system | |
| CN206889056U (en) | A kind of gs-oil separator, crankcase ventilation oil return system and automobile | |
| CN201826965U (en) | Two-stroke layering scavenging engine | |
| CN209743052U (en) | Two-stroke gasoline engine cylinder body | |
| CN206158843U (en) | Two -stroke -cycle engine layering scavenging subassembly | |
| CN209308849U (en) | A kind of valve chamber cover | |
| CN103821590A (en) | Crankcase oil-gas separation mechanism | |
| CN202707224U (en) | Novel two-stoke gasoline engine | |
| CN208441928U (en) | A kind of variable combustion two-cycle gasoline engine | |
| CN206309476U (en) | A kind of two-stroke internal combustion engine | |
| CN108571405B (en) | Two-stroke air guide type engine air inlet system | |
| CN205638681U (en) | Two -stroke -cycle engine's scavenge system | |
| CN205532844U (en) | Multilayer layering scavenging engine | |
| CN104791077A (en) | Novel two-stroke stratified scavenging engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |