CN204386721U - Two-stroke layered-scavenging engine - Google Patents
Two-stroke layered-scavenging engine Download PDFInfo
- Publication number
- CN204386721U CN204386721U CN201420808031.5U CN201420808031U CN204386721U CN 204386721 U CN204386721 U CN 204386721U CN 201420808031 U CN201420808031 U CN 201420808031U CN 204386721 U CN204386721 U CN 204386721U
- Authority
- CN
- China
- Prior art keywords
- air
- scavenging
- mixed gas
- stroke
- inwall
- 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
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)
Abstract
The utility model discloses a kind of two-stroke layered-scavenging engine, mainly comprise air scavenging parts and mixed gas scavenging parts, described air scavenging parts are primarily of air air storing cavity (10) and air scavenging passage (15) composition, described air scavenging passage (15) two ends communicate with the air scavenging mouth (16) and air air storing cavity (10) that are arranged on cylinder body (2) side inwall respectively, described mixed gas scavenging parts mainly comprise mixed gas scavenge trunk (17, 19), described mixed gas scavenge trunk (17, 19) cavity passage for being jointly made up of with the groove set by cylinder body (2) inwall piston (6) outer surface, described mixed gas scavenge trunk (17, 19) two ends respectively with the mixed gas scavenging port (18 be located in cylinder (3), 20) and crankcase (5) communicate.The utility model is set to the layered scavenging technological scheme with independent air scavenging air belt, significantly reduces the short-circuit loss of incoming mixture, reduces the noxious emission of motor.
Description
Technical field
The utility model relates to
technical field of engines, specificallyrelate to two-stroke layered-scavenging engine.
Background technique
High speed small displacement two stroke engine has that mechanical efficiency is high, specific power is large and low cost and other advantages, in fields such as agricultural, forestry, building, garden plant protection and movement entertainments in occupation of the huge market space.But in recent years, under the dual-pressure of the energy and environmental problem, national governments have put into effect more and more stricter Abgasgesetz respectively, two-stroke gasoline engine is owing to being subject to Economy and the impact, particularly HC+NO of the factor such as emission performance is poor
xwith the discharge of CO, cause serious environmental pollution, its development receives certain restriction.The main cause causing two-stroke gasoline engine to discharge difference is that gas exchange process is not thorough: incoming mixture flows directly into air outlet flue on the one hand, causes short-circuit loss; The products of combustion of a upper circulation still has part to remain in cylinder on the other hand.Gas exchange process does not thoroughly not only cause emission performance poor, also can increase two-stroke gasoline engine fuel consumption rate.The emission performance improving two-stroke gasoline engine mainly contains two approach: (1) improves gas exchange process, reduces short-circuit loss.Major measure has the technology such as engine blow-through air process optimization, layered scavenging and fuel injection; (2) exhaust gas aftertreatment techniques.Main finger exhaust catalysis transformation technology.Scavenging process is optimized on the basis of former two-stroke gasoline engine, with motor emission performance for index, the start-up time etc. of engine blow-through air road structural parameter, scavenging port and relief opening is optimized, research shows that the measures such as such measures and Carburetor Optimized Matching and electronic spark advance angle and optimizing are the same, all can improve the emission performance of two-stroke gasoline engine to a certain extent, but fundamentally can not solve the halfway problem of gas exchange process, to the performance improvement limited efficiency of motor.
Fuel injection techniques at present for two-stroke gasoline engine mainly contains mixed gas spraying technique and fuel direct injection technology.Mixed gas spraying technique refers to and is sprayed in cylinder after exhaust close by the mixed gas formed in advance again, and its mixed gas is provided by independently mixed Daqu device (as Carburetor).Fuel direct injection technology, directly by the fuel oil direct cylinder injection of liquid state, mainly can be divided into high pressure fuel injection, low-voltage fuel to spray and air auxiliary fuel injection three types.Fuel injection technic reduces two stroke engine short-circuit loss one of effective measures the most, but in small-sized non-rice habitats petrol engine, be subject to the restriction of installing space and cost, and its application prospect is unsatisfactory.
Layered scavenging technology uses air to replace incoming mixture to complete the scavenging function in early stage, makes air assume responsibility for main scavenging loss, thus can reduce the short-circuit loss of incoming mixture significantly.Correlative study shows, layered scavenging technology significantly can reduce the noxious emission of two-stroke gasoline engine, improving the thermal efficiency of motor, and do not increase structural complexity and the cost of motor, is one of the most practical to be developed in following small two stroke engines and that use technology.
Model utility content
The purpose of this utility model is to overcome the deficiency in existing two stroke engine technology, there is provided a kind of " two-stroke layered-scavenging engine ", the utility model reasonable in design, low manufacture cost, a kind of easy to install, reduce the short-circuit loss of incoming mixture significantly, reduce the noxious emission of two-stroke gasoline engine, effectively improve the two-stroke layered-scavenging engine of engine thermal efficiency.
To achieve these goals, the utility model is achieved through the following technical solutions: a kind of two-stroke is divided
Layer scavenging engine, main technological scheme is, comprise: cylinder body 2, body 4, crankcase 5, piston 6, bent axle 8,8 ', air scavenging parts and mixed gas scavenging parts, the air air storing cavity 10 that described air scavenging parts are formed primarily of the diaphragm 9 be fixedly connected on body 4 and the inwall of body 4 and air scavenging passage 15 form, and described air scavenging passage 15 two ends communicate with the air scavenging mouth 16 and air air storing cavity 10 that are arranged on cylinder body 2 side inwall respectively.Described mixed gas scavenging parts mainly comprise mixed gas scavenge trunk 17,19, described mixed gas scavenge trunk 17,19 cavity passage for being jointly made up of piston 6 outer surface and groove set by cylinder body 2 inwall, described mixed gas scavenge trunk 17, the two ends of 19 communicate with the mixed gas scavenging port 18,20 be located in cylinder 3 and crankcase 5 respectively.
Further technological scheme is, described mixed gas scavenge trunk 17,19 at least arranges one group, is symmetricly set on the inwall of cylinder body 2, air scavenging passage 15 at least arranges one, the interchangeable setting in spatial position of air scavenging passage 15, mixed gas scavenge trunk 17 and mixed gas scavenge trunk 19.
Further technological scheme is, the air inlet 11 with leaf valve 12 is provided with at the outer wall of air air storing cavity 10, be arranged on the upper end position of air air storing cavity 10, in the lower end of cylinder body 2 and the suitable position of piston about 6 stroke, be provided with mixed gas inlet 13.
Further technological scheme is, the inwall of cylinder body 2 side is provided with relief opening 14, and the position height of described relief opening 14 is successively higher than air scavenging mouth 16, mixed gas scavenging port 18,20.
If another main technological scheme of the utility model, bent axle 8 ' is provided with cam, jointly form cam structure with spring 21 and push rod 22, described spring 21 and push rod 22 are placed between the exterior edge face of bent axle 8 ' and the inwall of air air storing cavity 10.
Further technological scheme is, one end of described push rod 22 is fixedly connected with diaphragm 9, the exterior edge face close contact of the other end and bent axle 8 ', described spring 21 is arranged between the inwall of diaphragm 9 and body 4, described push rod 22 is located on same shaft axis with described spring 21, and this shaft axis is perpendicular to the tangent direction of bent axle 8.
Be provided with the mixed gas inlet 13 ' with leaf valve 12 ' in the opposite side position of body 4, be provided with the ventilated port 23 communicated with crankcase 5 at the bottom position of body 4.
Further technological scheme is, the size of described air scavenging mouth 16, mixed gas scavenging port 18,20 and its opening amount of mixed gas inlet 13,13 ' determined by piston about 6 travel position.
Further technological scheme is, the volume-variation amount of being out of shape caused air air storing cavity 10 because of described diaphragm 9 is the 10-50% of motor 1 air displacement.
Further technological scheme is, described diaphragm 9 material used is elastic material, is specially rubber material.
the utility modeltool has the following advantages:
1, the utility model reasonable in design, low manufacture cost, a kind of easy to install, significantly reduce the short-circuit loss of incoming mixture, reduce the noxious emission of two stroke engine, energy-saving and cost-reducing, to reduce environmental pollution, effectively raising engine thermal efficiency two-stroke layered-scavenging engine.
2, the utility model is set to independently air scavenging passage and mixed gas scavenge trunk, namely mixed gas and pure air are respectively by independently scavenging air belt and scavenging port enter cylinder, pure air replaces incoming mixture to complete the scavenging function in early stage, air assume responsibility for main scavenging loss, significantly reduce the short-circuit loss of incoming mixture, reduce the noxious emission of two-stroke gasoline engine, effectively improve engine thermal efficiency.
3, because being provided with relief opening on the inwall of cylinder body 2 side, the position height of described relief opening is successively higher than air scavenging mouth, mixed gas scavenging port, the interchangeable setting in spatial position of air scavenging passage 15, mixed gas scavenge trunk 17 and mixed gas scavenge trunk 19, scavenging port position arranges rationally, the cylinder wall surface that rich mixture is against away from relief opening flows, rich mixture and waste gas are kept apart, realize the technical purpose of layered scavenging, ventilation is thorough, scavenging is abundant, effectively reduce the short-circuit loss of incoming mixture further, reduce HC+NO
xwith the noxious emission of CO, energy-saving and cost-reducing, reduce environmental pollution.
4, structures shape set by the utility model, the volume-variation amount that described diaphragm 9 is out of shape caused air air storing cavity 10 is the 10-50% of motor 1 air displacement, to ensure further to realize technical purpose of the present utility model.
5, because being provided with cam on bent axle 8 ', jointly cam structure is formed with spring 21 and push rod 22, jointly diaphragm pump structure is formed with diaphragm 9, the mixed gas inlet 13 ' with leaf valve 12 ' is provided with, to ensure the reliability of designed diaphragm 9 amount of deformation further in the opposite side position of body 4.
6, technical solutions of the utility model enforcement to the structural complexity of motor and cost impact less.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that the A-A of Fig. 1 is to schematic cross-section.
Fig. 3 is the structural representation of another embodiment of the present utility model.
In figure: 1. motor, 2. cylinder body, 3. cylinder, 4. body, 5. crankcase, 6. piston, 7, connecting rod, 8,8 ', bent axle, 9, diaphragm, 10, air air storing cavity, 11, air inlet, 12,12 ', leaf valve, 13,13 ', mixed gas inlet, 14, relief opening, 15, air scavenging passage, 16, air scavenging mouth, 17,19, mixed gas scavenge trunk, 18,20, mixed gas scavenging port, 21, spring, 22, push rod, 23, ventilated port.
Embodiment
Below by non-limiting example, set forth the utility model further, understand the utility model.
embodiment 1
The utility model as shown in Figure 1, Figure 2 shown in, a kind of two-stroke layered-scavenging engine, main technological scheme
Be, comprise: cylinder body 2, body 4, crankcase 5, piston 6, bent axle 8, air scavenging parts and mixed gas scavenging parts, the air air storing cavity 10 that described air scavenging parts are formed primarily of the diaphragm 9 be fixedly connected on body 4 and the inwall of body 4 and air scavenging passage 15 form, and described air scavenging passage 15 two ends communicate with the air scavenging mouth 16 and air air storing cavity 10 that are arranged on cylinder body 2 side inwall respectively.Described mixed gas scavenging parts mainly comprise mixed gas scavenge trunk 17,19, described mixed gas scavenge trunk 17,19 cavity passage for being jointly made up of piston 6 outer surface and groove set by cylinder body 2 inwall, described mixed gas scavenge trunk 17, the two ends of 19 communicate with the mixed gas scavenging port 18,20 be located in cylinder 3 and crankcase 5 respectively.
Described mixed gas scavenge trunk 17,19 arranges two groups, and be symmetricly set on the inwall of cylinder body 2, air scavenging passage 15 arranges one, the interchangeable setting in spatial position of air scavenging passage 15, mixed gas scavenge trunk 17 and mixed gas scavenge trunk 19.
Be provided with the air inlet 11 with leaf valve 12 at the outer wall of air air storing cavity 10, be arranged on the upper end position of air air storing cavity 10, in the lower end of cylinder body 2 and the suitable position of piston about 6 stroke, be provided with mixed gas inlet 13.
The inwall of cylinder body 2 side is provided with relief opening 14, and the position height of described relief opening 14 is successively higher than air scavenging mouth 16, mixed gas scavenging port 18,20.
The size of described air scavenging mouth 16, mixed gas scavenging port 18,20 and its opening amount of mixed gas inlet 13 determined by piston about 6 travel position.
The volume-variation amount of being out of shape caused air air storing cavity 10 because of described diaphragm 9 is the 10-50% of motor 1 air displacement.
Described diaphragm 9 material used is rubber material.
embodiment 2
The utility model as shown in Figure 1, Figure 2, shown in Fig. 3, a kind of two-stroke layered-scavenging engine, main technological scheme is, comprise: cylinder body 2, body 4, crankcase 5, piston 6, bent axle 8 ', air scavenging parts and mixed gas scavenging parts, the air air storing cavity 10 that described air scavenging parts are formed primarily of the diaphragm 9 be fixedly connected on body 4 and the inwall of body 4 and air scavenging passage 15 form, and described air scavenging passage 15 two ends communicate with the air scavenging mouth 16 and air air storing cavity 10 that are arranged on cylinder body 2 side inwall respectively.Described mixed gas scavenging parts mainly comprise mixed gas scavenge trunk 17,19, described mixed gas scavenge trunk 17,19 cavity passage for being jointly made up of piston 6 outer surface and groove set by cylinder body 2 inwall, described mixed gas scavenge trunk 17, the two ends of 19 communicate with the mixed gas scavenging port 18,20 be located in cylinder 3 and crankcase 5 respectively.
Described mixed gas scavenge trunk 17,19 arranges two groups, and be symmetricly set on the inwall of cylinder body 2, air scavenging passage 15 arranges one, the interchangeable setting in spatial position of air scavenging passage 15, mixed gas scavenge trunk 17 and mixed gas scavenge trunk 19.
The inwall of cylinder body 2 side is provided with relief opening 14, and the position height of described relief opening 14 is successively higher than air scavenging mouth 16, mixed gas scavenging port 18,20.
Bent axle 8 ' is provided with cam, jointly forms cam structure with spring 21 and push rod 22, described spring 21 and push rod 22 are placed between the exterior edge face of bent axle 8 ' and the inwall of air air storing cavity 10.
One end of described push rod 22 is fixedly connected with diaphragm 9, the exterior edge face close contact of the other end and bent axle 8 ', described spring 21 is arranged between the inwall of diaphragm 9 and body 4, and described push rod 22 is located on same shaft axis with described spring 21, and this shaft axis is perpendicular to the tangent direction of bent axle 8.
Be provided with the mixed gas inlet 13 ' with leaf valve 12 ' in the opposite side position of body 4, be provided with the ventilated port 23 communicated with crankcase 5 at the bottom position of body 4.
The size of described air scavenging mouth 16, mixed gas scavenging port 18,20 and its opening amount of mixed gas inlet 13 ' determined by piston about 6 travel position.
The volume-variation amount of being out of shape caused air air storing cavity 10 because of described diaphragm 9 is the 10-50% of motor 1 air displacement.
Described diaphragm 9 material used is rubber material.
Further illustrate layered scavenging process of the present utility model below.
The utility model has the layered scavenging scheme of independent air scavenging air belt, namely mixed gas and pure air are respectively by independently scavenging air belt and scavenging port enter cylinder, at intake stroke, pure air is introduced into an air air storing cavity isolated with crankcase, air air storing cavity is connected with air scavenging road, controls pure air and enters cylinder at scavenging stroke.
The utility model adopts independently air scavenging road to realize layered scavenging, and the supply of air is by following two kinds of mode air supplies:
(1) diaphragm is set between crankcase and air storing cavity, as shown in Figure 1 and Figure 2.At intake stroke, when connecting rod 7 drives piston upwards by bent axle 8, crankcase pressure reduces, and diaphragm moves to crankcase side, thus causes air storing cavity internal pressure to reduce, and air enters air storing cavity through leaf valve; At scavenging stroke, when piston moves downward, crankcase pressure increases, and diaphragm is to air storing cavity lateral movement, and air storing cavity internal pressure rises, and now leaf valve cuts out, and air enters cylinder through air scavenging road, replaces mixed gas to complete scavenging function.
(2) adopt by the diaphragm pump air supply of crank-driven, as shown in Figure 1, Figure 2, Figure 3 shows. at intake stroke, diaphragm is under the action of the spring to air storing cavity movement outside, and air enters air storing cavity by leaf valve; At scavenging stroke, crank-driven diaphragm is to air storing cavity lateral movement, and leaf valve cuts out, and pressurized air enters cylinder from air scavenging road.
In sum, the layered scavenging technology that the utility model and air and mixed gas share scavenging air belt is compared, the utility model is set to the layered scavenging technological scheme with independent air scavenging air belt, scavenging port position arranges rationally, significantly reduce the short-circuit loss of incoming mixture, reduce the noxious emission of motor, energy-saving and cost-reducing, minimizing environmental pollution, by enforcement of the present utility model, the emission performance of motor can meet U.S. EPA phase III standard and European second stage standard.
Claims (10)
1. a two-stroke layered-scavenging engine, mainly comprise: cylinder body (2), body (4), crankcase (5), piston (6), bent axle (8, 8 '), air scavenging parts and mixed gas scavenging parts, it is characterized in that, the air air storing cavity (10) that described air scavenging parts are formed primarily of the inwall of the diaphragm (9) be fixedly connected on body (4) and body (4) and air scavenging passage (15) form, described air scavenging passage (15) two ends communicate with the air scavenging mouth (16) and air air storing cavity (10) that are arranged on cylinder body (2) side inwall respectively, described mixed gas scavenging parts mainly comprise mixed gas scavenge trunk (17, 19), described mixed gas scavenge trunk (17, 19) cavity passage for being jointly made up of with the groove set by cylinder body (2) inwall piston (6) outer surface, described mixed gas scavenge trunk (17, 19) two ends respectively with the mixed gas scavenging port (18 be located in cylinder (3), 20) and crankcase (5) communicate.
2. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, described mixed gas scavenge trunk (17,19) one group is at least arranged, be symmetricly set on the inwall of cylinder body (2), air scavenging passage (15) at least arranges one, the interchangeable setting in spatial position of air scavenging passage (15), mixed gas scavenge trunk (17,19).
3. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, the air inlet (11) with leaf valve (12) is provided with at the outer wall of air air storing cavity (10), be arranged on the upper end position of air air storing cavity (10), in the lower end of cylinder body (2) and piston (6) the suitable position of stroke up and down, be provided with mixed gas inlet (13).
4. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, the inwall of cylinder body (2) side is provided with relief opening (14), and the position height of described relief opening (14) is successively higher than air scavenging mouth (16), mixed gas scavenging port (18,20).
5. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, bent axle (8 ') is provided with cam, jointly form cam structure with spring (21) and push rod (22), described spring (21) and push rod (22) are placed between the inwall of bent axle (8 ') exterior edge face and air air storing cavity (10).
6. a kind of two-stroke layered-scavenging engine according to claim 5, it is characterized in that, one end of described push rod (22) is fixedly connected with diaphragm (9), the exterior edge face close contact of the other end and bent axle (8 '), described spring (21) is arranged between the inwall of diaphragm (9) and body (4), described push rod (22) and described spring (21) are located on same shaft axis, and this shaft axis is perpendicular to the tangent direction of bent axle (8 ').
7. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, be provided with the mixed gas inlet (13 ') with leaf valve (12 ') in the opposite side position of body (4), be provided with the ventilated port (23) communicated with crankcase (5) at the bottom position of body (4).
8. a kind of two-stroke layered-scavenging engine according to claim 1, it is characterized in that, the size of described air scavenging mouth (16), mixed gas scavenging port (18,20) and mixed gas inlet (13,13 ') its opening amount by piston (6) up and down travel position determined.
9. a kind of two-stroke layered-scavenging engine according to any one of claim 1-8 claim, is characterized in that, the volume-variation amount because of the caused air air storing cavity (10) of described diaphragm (9) distortion is the 10-50% of motor (1) air displacement.
10. a kind of two-stroke layered-scavenging engine according to claim 9, is characterized in that, described diaphragm (9) material used is elastic material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420808031.5U CN204386721U (en) | 2014-12-19 | 2014-12-19 | Two-stroke layered-scavenging engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420808031.5U CN204386721U (en) | 2014-12-19 | 2014-12-19 | Two-stroke layered-scavenging engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204386721U true CN204386721U (en) | 2015-06-10 |
Family
ID=53359451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420808031.5U Expired - Fee Related CN204386721U (en) | 2014-12-19 | 2014-12-19 | Two-stroke layered-scavenging engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204386721U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500211A (en) * | 2014-12-19 | 2015-04-08 | 江苏林海动力机械集团公司 | Two-stroke stratified scavenging engine |
-
2014
- 2014-12-19 CN CN201420808031.5U patent/CN204386721U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104500211A (en) * | 2014-12-19 | 2015-04-08 | 江苏林海动力机械集团公司 | Two-stroke stratified scavenging engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104500211A (en) | Two-stroke stratified scavenging engine | |
| CN204386722U (en) | A kind of two-stroke layered-scavenging engine | |
| CN2856429Y (en) | General multiple air gates admission gear of small I.C.engine | |
| CN201874676U (en) | Six-stroke internal combustion engine | |
| CN204386721U (en) | Two-stroke layered-scavenging engine | |
| CN103016136A (en) | High-supercharged two-stroke direct injection engine and ventilation method thereof | |
| CN105545538A (en) | Rotation driving type lifting control system | |
| CN205591977U (en) | Controllable internal -combustion engine in right time of piston | |
| CN205025559U (en) | Low general small -size two cycle gasoline engine of environmental protection of arranging | |
| CN203022871U (en) | Two-stroke stratified scavenging engine | |
| CN203130317U (en) | Engine provided with common oil and gas nozzle | |
| CN203948199U (en) | A kind of EGR system | |
| CN2883708Y (en) | Engine combustion supporting booster | |
| CN100368663C (en) | Two-stroke structure/four-stroke internal combustion engine system | |
| CN104500212A (en) | Two-stroke stratified scavenging engine | |
| CN203009033U (en) | High-pressurization two-stroke in-cylinder direct injection engine | |
| CN2811572Y (en) | Intake valve and exhaust valve co-used engine | |
| CN204738873U (en) | A two -stroke -cycle engine for car, motorcycle | |
| CN202578813U (en) | Valve stem of automobile engine | |
| CN202215348U (en) | four-stroke internal combustion engine with high compression ratio | |
| CN202348424U (en) | Gas guide type engine | |
| CN2413032Y (en) | Two-stroke and four-stroke composite engine | |
| CN202926487U (en) | Low-emission minitype two-stroke petrol motor | |
| CN215633374U (en) | Three-valve structure of engine | |
| CN2481856Y (en) | Charging built-in air passage two-stroke engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150610 Termination date: 20171219 |