CN102322333A

CN102322333A - Two-stroke layered-scavenging engine

Info

Publication number: CN102322333A
Application number: CN201110279136A
Authority: CN
Inventors: 李玲明; 李清砺; 尤春明; 李德军; 邵逸群; 陈秀明
Original assignee: Shandong Huasheng Pesticide Machinery Co Ltd
Current assignee: Shandong Huasheng Pesticide Machinery Co Ltd
Priority date: 2011-08-26
Filing date: 2011-08-26
Publication date: 2012-01-18

Abstract

The invention provides a two-stroke layered-scavenging engine. A carburetor of the two-stroke layered-scavenging engine is in a single-hole rotary valve type structure and has the appearance and the connection manner same as those of a carburetor used in the common two-stroke gasoline engine; since a horizontal baffle plate is placed in the carburetor to divide a circular inlet passage into an air passage and a gas mixture passage, the carburetor has the layered-scavenging function; fresh air in an air storage cavity of a cylinder body is pressed into a combustion chamber of the cylinder body by a precompressed combustible gas mixture during the layered scavenging to carry out first scavenging, then the combustible gas mixture enters the combustion chamber to carry out scavenging, in this way, the escape of unburned combustible gas mixture is greatly reduced, the discharge of pollutants is improved, the fuel consumption rate of the engine is effectively reduced, the economic performance of the engine is improved, meanwhile, the outer appearance of the entire engine and an throttle control mechanism are not required to be changed, the structure is simpler, and the reliability is higher.

Description

A kind of two-stroke layered scavenging motor

Technical field

The present invention relates to technical field of engines, particularly a kind of general small-size two-stroke layered scavenging motor.

Background technique

Two stroke engine because have that compact structure, volume are little, light weight, running speed-raising are fast etc., and many remarkable advantages are widely used in many product scopes such as agricultural, forestry, gardening, family.

Conventional two stroke engine is made up of component such as cylinder body, piston, crankshaft-link rod, magnetogenerator, Carburetors; On cylinder body, be provided with suction port, relief opening and scavenging port; These gas ports are all moved by piston and open or close; In scavenging process, being used for the fresh inflammable mixture of scavenging mixes with waste gas after burning easily and goes out without the burning or insufficient just row of burning, so not only fuel consume is high for two stroke engine, and contains a large amount of harmful components (like HC and CO) in the tail gas; Influence to pollution of atmosphere is significant, does not also meet the existing emission regulation demands of China in addition; Present layered scavenging two-stroke gasoline engine has low, the fuel-efficient characteristics of discharging, receives consumers in general's favor, but has its gas handling system; The structure more complicated of Carburetor particularly, poor reliability, and the higher shortcoming of price of complete machine; So concerning most of enterprises; Be badly in need of a kind of equally simple in structure with common two stroke engine, reliability is high, moderate cost, and possess simultaneously the two stroke engine of characteristics such as discharging is low, oil consumption is low.

Summary of the invention

The purpose of this invention is to provide a kind of two-stroke layered scavenging motor; Its Carburetor is a single hole rotary valve structure, and its outward appearance and Placement are consistent with the Carburetor that common two-stroke gasoline engine uses, but owing in Carburetor, place a horizontal baffle circular gas-entered passageway is divided into air passageways and mixed gas passage; Make it possess the function of layered scavenging; During scavenging in the cylinder body air storing cavity fresh air be pressed into the scavenging of going ahead of the rest of cylinder body firing chamber by precompressed inflammable mixture, inflammable mixture gets into the firing chamber again and carries out scavenging afterwards, has significantly reduced the escape of last burning inflammable mixture like this; Thereby reach the purpose that reduces harmful components (HC+NOx) content in the tail gas; Improve the discharging of pollutant greatly, and effectively reduced the fuel consumption rate of motor, improved its economic performance; Simultaneously, close air passageways during owing to engine idling condition, open mixed gas passage, make idling stable, acceleration performance is good, because the outward appearance of complete machine and manipulating mechanism of oil throttle need not to change, structure is simpler, easy for installation, reliability is higher again.

The technological scheme that the present invention takes is:

A kind of two-stroke layered scavenging motor; Comprise cylinder body, piston, spark plug, Carburetor, empty filter, suction tude, leaf valve combination, crankcase combination and baffler; It is characterized in that: Carburetor is a single hole rotary valve structure; Be provided with circular gas-entered passageway and horizontal baffle one, said horizontal baffle one is positioned at position on the upper side, said circular gas-entered passageway center, and gas-entered passageway is divided into upside air passageways one and downside mixed gas passage one; The gas-entered passageway of suction tude is provided with horizontal baffle two, and it is divided into air passageways two and mixed gas passage two, and said horizontal baffle two stretches out with horizontal baffle one to carburetor side and engages, and forms air passageways and the mixed gas passage separated fully.

The invention has the beneficial effects as follows,, can effectively reduce the content of emission in the tail gas owing to use the scavenging of going ahead of the rest of pure air; Its fuel consumption rate also reduces significantly, and simultaneously, the Carburetor that this scheme is used is to improve a little in the inside of common two-stroke gasoline engine Carburetor; Its outward appearance and Placement are identical, and therefore, the complete machine cost is low; Connect easyly, the user can be at complete constant situation decline low emission and the fuel consume of outward appearance.

Description of drawings

Fig. 1 is a scheme schematic representation of the present invention

Fig. 2 is the schematic representation of cylinder body of the present invention

Fig. 3 is the schematic representation of Carburetor of the present invention

Fig. 4 is the schematic representation of suction tude of the present invention

Sequence number explanation in the accompanying drawing: 1, empty filter; 2, Carburetor; 3, suction tude; 4, leaf valve combination; 5, cylinder body; 6, spark plug; 7, piston; 8, crankcase combination; 9, baffler; 10, air passageways; 11, mixed gas inlet; 12, air air storing cavity; 13, scavenging port; 14, scavenging air belt; 15, relief opening; 16, plunger; 17, circular gas-entered passageway; 18, air passageways one; 19, mixed gas passage one; 20, spindle; 21, nozzle; 22, horizontal baffle; 23, horizontal baffle two; 24, air passageways two; 25, mixed gas passage two.

Embodiment

Like Fig. 1, Fig. 2, Fig. 3, shown in Figure 4; Two-stroke layered scavenging motor of the present invention is made up of cylinder body 5 (air passageways 10, mixed gas inlet 11, air air storing cavity 12, scavenging port 13, scavenging air belt 14, relief opening 15), piston 7, spark plug 6, Carburetor 2 (plunger 16, circular gas-entered passageway 17, air passageways 1, mixed gas passage 1, spindle 20, nozzle 21, horizontal baffle 1), empty filter 1, suction tude 3 (horizontal baffle 2 23, air passageways 2 24, mixed gas passage 2 25), leaf valve combination 4, crankcase combination 8, baffler 9.

The A face of Carburetor 2 is connected with empty filter 1, and the B face is connected with suction tude 3, and horizontal baffle 1 is connected with horizontal baffle 2 23, and air passageways 1 is connected with air passageways 2 24 simultaneously, and mixed gas passage 1 is connected with mixed gas passage 2 25; Suction tude 3 opposite sides are connected with cylinder body 5 through leaf valve combination 4, and when the normal working of engine air inlet, air passageways 2 24, mixed gas passage 2 25 are connected with air passageways 10, mixed gas inlet 11 respectively.

The air passageways 10 that on cylinder body 5, is provided with relief opening 15, scavenging port 13, scavenging air belt 14, mixed gas inlet 11 and air air storing cavity 12 respectively and air air storing cavity 12 and scavenging port 13 are connected.Relief opening 15 is arranged on the opposite of suction port 11, and scavenging port 13 and scavenging air belt 14 are arranged on the neutral position of relief opening 15 and suction port 11, when piston 7 moves up and down, can open or close gas port at reasonable time.

Carburetor 2 is a single hole rotary valve structure; On circular gas-entered passageway 17, be provided with horizontal baffle 1 it is divided into two relatively independent gas-entered passageways; Upside is an air passageways 1; Downside is a mixed gas passage 1, horizontal baffle 1 be placed on the circular hole center on the upper side, the position of oil nozzle more than 21; The throttle rope links to each other with spindle 20 through plunger 16.

Two-stroke layered scavenging engine working process is following:

When spindle 20 being raised through the plunger 16 on the pulling throttle rope rotary carburetor 2; In the up process of piston 7; Compression cylinder 5 top mixed gass, the 8 inner negative pressure that form of crankcase combination simultaneously are under the effect of atmospheric pressure; Mixed gas passage one 19 inner high speed flow air with fuel oil from oil nozzle 21 sucking-offs and with its rapid atomizing; Form inflammable mixture, this mixed gas is inhaled in the crankcase through mixed gas passage 2 25, mixed gas inlet 11, and pure air gets on the cylinder bodies in the air air storing cavity 12 from air passageways 1, air passageways 2 24 and leaf valve combination 4 simultaneously; Store wherein, and enter near the cylinder body scavenging port 13 through the air passageways 10 that is communicated with scavenging air belt 14.After the mixed gas of piston 7 tops is lighted by spark plug 6, the acting of expanding rapidly, it is descending to promote piston 7; Mixed gas in the compression crankshaft case 8 is closed mixed gas inlet 11 simultaneously gradually, at piston 7 during near lower dead center; Relief opening 15 is opened, and part waste gas is discharged to the atmosphere through baffler 9 from relief opening 15, along with piston 7 is further descending; Scavenging port 13 is opened, and the inflammable mixture that is compressed is pressed into the fresh air in the air air storing cavity 12 in the cylinder body 5, at this moment from scavenging port 13 through cylinder body scavenging air belt 14; Fresh air is preceding, inflammable mixture after, scavenge flow with certain scavenging angle from scavenging port 13 spray into relief opening 15 over against cylinder body 5 internal faces drive away waste gas; Thereby waste gas after burning is discharged from relief opening, realized the work overall process of layered scavenging.

When pulling throttle rope left engine idling, air passageways 1 was in closed condition basically, and only mixed gas passage 1 is opened, and can guarantee that engine idle is more stable, and acceleration performance is better.

Through this air preceding, mixed gas after the scavenging mode, can effectively reduce the content of harmful components in the tail gas; The content of HC (hydrocarbon) particularly; Improve the discharging of pollutant greatly, and effectively reduced the fuel consumption rate of motor, improved fuel economy.

Claims

1. two-stroke layered scavenging motor; Comprise cylinder body, piston, spark plug, Carburetor, empty filter, suction tude, leaf valve combination, crankcase combination and baffler; It is characterized in that: Carburetor is a single hole rotary valve structure; Be provided with circular gas-entered passageway and horizontal baffle one, said horizontal baffle one is positioned at position on the upper side, said circular gas-entered passageway center, and it is divided into upside air passageways one and downside mixed gas passage one; The gas-entered passageway of suction tude is provided with horizontal baffle two, and gas-entered passageway is divided into air passageways two and mixed gas passage two, and said horizontal baffle two stretches out with horizontal baffle one to carburetor side and engages, and forms air passageways and the mixed gas passage separated fully.