CN204646404U - A kind of novel two-stroke layered-scavenging engine - Google Patents
A kind of novel two-stroke layered-scavenging engine Download PDFInfo
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- CN204646404U CN204646404U CN201520284970.9U CN201520284970U CN204646404U CN 204646404 U CN204646404 U CN 204646404U CN 201520284970 U CN201520284970 U CN 201520284970U CN 204646404 U CN204646404 U CN 204646404U
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- scavenging
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The utility model discloses a kind of novel two-stroke layered-scavenging engine, it comprises air filter, Carburetor and the cylinder body be interconnected and crankcase body; The side of cylinder body is interconnected by suction tude and Carburetor; Free-air diffuser and mixed gas intake duct is provided with in suction tude; The both sides of cylinder body are arranged with scavenging air belt respectively; The upper end of scavenging air belt is communicated with the cylinder chamber of cylinder interior by scavenging port, and lower end is communicated with crankcase body; Air chamber is communicated with by the scavenging port of air channel with scavenging air belt upper end.Work as descent of piston, scavenging port is opened, first fresh air in air chamber is pressed in cylinder body, flammable mixed gas is pressed in cylinder body after air, form fresh air and carry out combustion gas at the posterior purge mode of front burning mixture, short-circuit loss is little, energy consumption is low, till piston stroking upward closes scavenging port; Air and mixed gas share a scavenging port and carry out scavenging, and the gas port quantity of inboard wall of cylinder block can be made obviously to reduce, and making is convenient and cost is low.
Description
technical fieldthe utility model belongs to two stroke engine technical field, is specifically related to a kind of novel two-stroke layered-scavenging engine.
background techniquein prior art, two stroke engine has the features such as structure is simple, lightweight, power per liter is large, is thus widely used in motorcycle field, is also widely used in fields such as agricultural, forestry, gardening simultaneously; Although two stroke engine has plurality of advantages, but due to different from the gas exchange process of four stroke engine, two stroke engine needs to carry out scavenging with fresh inflammable mixture, the easy like this part inflammable mixture that causes together is discharged with tail gas, namely usually said short-circuit loss, thus cause the problem that oil consumption is high, exhaust pollution is serious, therefore, along with the further strict of the regulation of exhaust emissions in recent years and people are to the progressively enhancing of environmental consciousness, the application & development of two stroke engine is restricted; At present, existing two-stroke gasoline engine comprises the parts compositions such as cylinder block, piston, crankcase, one end of cylinder block is connected with Carburetor, its the other end is connected with exhaust silencer, its working principle utilizes the pressure in crankcase to change, make air form mixed gas by Carburetor and gasoline and enter crankcase, then enter firing chamber by the scavenging air belt that cylinder block is arranged; The shortcoming of this traditional two-stroke gasoline engine scavenging techniques is: utilize fresh inflammable mixture to carry out scavenging, the unlatching of scavenging port has overlapping with the unlatching of relief opening in time, the fresh inflammable mixture that part is come in is discharged with gas of combustion, cause short-circuit loss, so two stroke engine is compared with four stroke engine, not only fuel-economy performance is poor, and contains a large amount of harmful components in tail gas as HC and CO; Therefore, although the discharge capacity of two stroke engine is relatively little, but relative to four-stroke gasoline engine emission performance mutually far short of what is expected, traditional two stroke engine has been difficult to meet increasingly strict Abgasgesetz, and the hydrocarbon emission especially in tail gas refers to well beyond specified value.
Notification number be CN203783745 patent discloses a kind of layered scavenging two stroke petrol engine cylinder, the short-circuit loss of mixed combustible gas body can be solved, but the complex structure of its cylinder body, limited inboard wall of cylinder block is provided with multiple gas port, manufacture complicated cost high, during layered scavenging, air and mixed gas carry out scavenging by different scavenging ports; And, Rectifier plate on scavenging air belt is fixed structure, the air inflow of mixed gas is limited, the effectiveness comparison being used for limiting mixed gas inlet at the scavenging initial stage is good, but when the scavenging later stage needs a large amount of mixed gas to enter firing chamber participation burning, the inlet of mixed gas can be limited, degradation problem under engine power can be caused, particularly cold start up period, mixed gas dense is in a large number needed to enter normal work by combustion in guarantee cylinder body, therefore, the existence of throttle orifice can cause declining to a great extent of cold startability in this case; It is many that notification number is that the open source literature of CN104500212, CN201826965 and CN104314682 also all exists cylinder body gas port, complex manufacturing process, and high in cost of production is not enough.
goal of the inventionthe purpose of this utility model solves prior art to have that the many pollutions of short-circuit loss are large, energy consumption is high and baroque technical problem, provides a kind of novel two-stroke layered-scavenging engine, to solve the deficiencies in the prior art.
To achieve these goals, a kind of novel two-stroke layered-scavenging engine of the utility model, it comprises air filter, Carburetor and the cylinder body be interconnected and crankcase body; Described cylinder body is provided with spark plug and radiating fin; The side of described cylinder body is interconnected by suction tude and Carburetor; Its main points are provided with free-air diffuser and mixed gas intake duct in described suction tude; One end of described free-air diffuser is communicated with air filter, and the other end is communicated with the air chamber in cylinder body by one-way leaf valve; One end of described mixed gas intake duct is communicated with Carburetor, and the other end is communicated with crankcase body by suction port; The both sides of described cylinder body are arranged with scavenging air belt respectively; The upper end of described scavenging air belt is communicated with the cylinder chamber of cylinder interior by scavenging port, and lower end is communicated with crankcase body; Described air chamber is communicated with by the scavenging port of air channel with scavenging air belt upper end.
In order to thoroughly discharge tail gas, the incident angle of described scavenging air belt upper end scavenging port is 151 degree.
Described one-way leaf valve can be opened under pressure is the negative pressure of 210Pa.
Of the present utility model rational in infrastructure, easy to use, when piston does downward stroke, what open at first is relief opening, and the tail gas after burning is discharged from exhaust ports, along with piston continues descending, scavenging port is opened, first fresh air in air chamber is pressed in cylinder body, and flammable mixed gas is pressed in cylinder body after air, forms fresh air and carrys out combustion gas at the posterior purge mode of front burning mixture, short-circuit loss is little, energy consumption is low, till piston stroking upward closes scavenging port; One-way leaf valve is unidirectional unlatching under cylinder body is the negative pressure of 210Pa, fresh air can be allowed to enter air chamber and store; Scavenging port is positioned at the below of relief opening, the top of suction port; Air and mixed gas share a scavenging port and carry out scavenging, and the gas port quantity of inboard wall of cylinder block can be made obviously to reduce, and making is convenient and cost is low.The utility model solves that the many pollutions of prior art short-circuit loss are large, energy consumption is high and baroque technical problem.
accompanying drawing explanationfig. 1 is the utility model structural representation plan view;
Fig. 2 be in Fig. 1 A-A to structural representation sectional view;
Fig. 3 be in Fig. 1 B-B to structural representation sectional view;
Fig. 4 is the structural representation of scavenging air belt in cylinder body skirt section;
Fig. 5 be in Fig. 4 C-C to structural representation sectional view;
Fig. 6 be in Fig. 4 D-D to structural representation sectional view;
Fig. 7 is the distribution reference drawing of piston stroking upward stage each medium;
Fig. 8 is the distribution reference drawing of descent of piston starting stage each medium;
Fig. 9 is the distribution reference drawing of descent of piston interstage each medium;
Figure 10 is the distribution reference drawing of each medium of descent of piston ending phase.
In figure 1, air filter 2, Carburetor 3, suction tude 4, spark plug 5, cylinder body 6, firing chamber 7, piston 8, cylinder chamber 9, free-air diffuser 10, mixed gas intake duct 11, crankcase body 12, suction port 13, one-way leaf valve 14, scavenging port 15, scavenging air belt 16, relief opening 17, air chamber 18, air channel
embodimentaccording to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 and Figure 10, the utility model it comprise air filter 1, Carburetor 2 and the cylinder body 5 be interconnected and crankcase body 11; Described cylinder body 5 is provided with spark plug 4 and radiating fin; The side of described cylinder body 5 is interconnected by suction tude 3 and Carburetor 2; Free-air diffuser 9 and mixed gas intake duct 10 is provided with in described suction tude 3; One end of described free-air diffuser 9 is communicated with air filter 1, and the other end is communicated with the air chamber 17 in cylinder body 5 by one-way leaf valve 13; One end of described mixed gas intake duct 10 is communicated with Carburetor 2, and the other end is communicated with crankcase body 11 by suction port 12; The both sides of described cylinder body 5 are arranged with scavenging air belt 15 respectively; The upper end of described scavenging air belt 15 is communicated with by the cylinder chamber 8 of scavenging port 14 with cylinder body 5 inside, and lower end is communicated with crankcase body 11; Described air chamber 17 is communicated with by the scavenging port 14 of air channel 18 with scavenging air belt 15 upper end; The incident angle of described scavenging air belt 15 upper end scavenging port 14 is 151 degree; Described one-way leaf valve 13 is can open under the negative pressure of 210Pa at pressure.
Working principle: in piston 7 upward stroke, as shown in Figure 7, piston 7 starts the fresh burning mixture of compression cylinder 5 inside after closing relief opening 16, pressure in crankcase body 11 simultaneously below piston 7 reduces, under atmospheric pressure effect, air enters free-air diffuser 9 from air filter 1, and enters the air chamber 17 on cylinder body 5 by one-way leaf valve 13, and is kept in air chamber 17 and air channel 18; Meanwhile, fresh burning mixture is inhaled in crankcase body 11 from Carburetor 2 through mixed gas intake duct 10 and suction port 12, and wherein part inflammable mixture cognition enters into scavenging air belt 15; When piston 7 up close to top dead center time, spark plug 4 is lighted a fire, and lights by the fresh burning mixture compressed in cylinder body 5 firing chamber 6, and piston 7 is after arrival top dead center, and the high temperature and high pressure gas that burning produces expands and promotes piston 7 and move down and enter downward stroke.
In downward stroke, as shown in Figure 8, suction port 12 is closed gradually, be inhaled into the fresh burning mixture in crankcase body 11 and the pure air in air channel 18 is compressed because piston 7 is descending, when piston 7 is close to lower dead center, relief opening 16 is unlocked gradually, and portion is discharged through relief opening 16 because pressure itself is greater than ambient pressure; Along with piston 7 continues descending, as shown in Figure 9, relief opening 16 is fully opened, and scavenging port 14 is just opened, and the pure air in air channel 18 and air chamber 17 is pressed into cylinder body 5 inner casing chamber 8 at first and carries out scavenging; As shown in Figure 10, scavenging port 14 is fully opened, and fresh burning mixture enters cylinder chamber 8 after air, forms air and carrys out combustion gas at the posterior purge mode of front fresh burning mixture, till the up closedown scavenging port 14 of piston 7; During scavenging, scavenge flow sprays to cylinder body 5 internal face just right with relief opening 16 from scavenging port 14 with the incident angle of 151 degree, and scavenge flow is turned back after impacting cylinder body 5 internal face, thus is discharged completely from relief opening 16 by the waste gas after burning.
Scavenging port 14 in the utility model, relief opening 16 and suction port 12 from up to down sort successively as relief opening 16, scavenging port 14 and suction port 12, on position relationship, relief opening 16 is nearest with the firing chamber 6 in cylinder body 5, suction port 12 and firing chamber 6 are farthest, during to ensure that piston 7 is descending, scavenging port 14 is opened after relief opening 16; The firing chamber 6 of one near hemispherical is arranged at the top of cylinder body 5, and spark plug 4 is from the top of embedding firing chamber, outside 6; The surrounding of cylinder body 5 arranges multi-disc radiating fin, in order to the heat produced in the engine working process that dissipates.
The utility model is relative to the two-stroke gasoline engine using conventional art, scavenging is carried out owing to adopting the purge mode of air after burning mixture, decrease the short-circuit loss in scavenging process, the content of harmful components in tail gas can be effectively reduced, the particularly discharge capacity of hydrocarbon, its fuel consumption rate also significantly reduces; Air and mixed gas share a scavenging port and carry out scavenging, and the gas port quantity of inboard wall of cylinder block can be made obviously to reduce, and making is convenient and cost is low.
All distortion that those of ordinary skill in the art can not make creative work and directly derive or associate from content disclosed in the utility model, all should drop within protection domain of the present utility model.
Claims (2)
1. a novel two-stroke layered-scavenging engine, it comprises air filter, Carburetor and the cylinder body be interconnected and crankcase body; Described cylinder body is provided with spark plug and radiating fin; The side of described cylinder body is interconnected by suction tude and Carburetor; It is characterized in that in described suction tude, being provided with free-air diffuser and mixed gas intake duct; One end of described free-air diffuser is communicated with air filter, and the other end is communicated with the air chamber in cylinder body by one-way leaf valve; One end of described mixed gas intake duct is communicated with Carburetor, and the other end is communicated with crankcase body by suction port; The both sides of described cylinder body are arranged with scavenging air belt respectively; The upper end of described scavenging air belt is communicated with the cylinder chamber of cylinder interior by scavenging port, and lower end is communicated with crankcase body; Described air chamber is communicated with by the scavenging port of air channel with scavenging air belt upper end.
2. the novel two-stroke layered-scavenging engine of one according to claim 1, is characterized in that the incident angle of described scavenging air belt upper end scavenging port is 151 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520284970.9U CN204646404U (en) | 2015-05-06 | 2015-05-06 | A kind of novel two-stroke layered-scavenging engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520284970.9U CN204646404U (en) | 2015-05-06 | 2015-05-06 | A kind of novel two-stroke layered-scavenging engine |
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| Publication Number | Publication Date |
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| CN204646404U true CN204646404U (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520284970.9U Expired - Fee Related CN204646404U (en) | 2015-05-06 | 2015-05-06 | A kind of novel two-stroke layered-scavenging engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791077A (en) * | 2015-05-06 | 2015-07-22 | 大阳通用机械有限公司 | Novel two-stroke stratified scavenging engine |
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2015
- 2015-05-06 CN CN201520284970.9U patent/CN204646404U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104791077A (en) * | 2015-05-06 | 2015-07-22 | 大阳通用机械有限公司 | Novel two-stroke stratified scavenging engine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20160506 |
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| CF01 | Termination of patent right due to non-payment of annual fee |