CN102392760A

CN102392760A - Carburetor of two-stroke layered scavenging engine

Info

Publication number: CN102392760A
Application number: CN2011102791475A
Authority: CN
Inventors: 李玲明; 李清砺; 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: 2012-03-28

Abstract

The invention aims at providing a carburetor of a two-stroke layered scavenging engine. The carburetor comprises a carburetor main body, a plunger piston, an oil streak, an oil nozzle, a level separating plate, an air channel and a mixing air channel, wherein the carburetor is characterized in that the carburetor has single-pore rotary valve type structure; the level separating plate is arranged on a circular air inlet channel of the plunger piston; the channel is divided into an air channel at the upside and a mixing air channel at the underside, so that the carburetor has the function of scavenging by means of layering; the fresh air is scavenged firstly, and the flammable mixing air is scavenged secondarily, so that the flammable mixing air without being completely burned can be greatly prevented from leaking, and the discharging of pollutant is improved; if the engine is idling, the mixing air channel at the underside is opened, and the air channel at the upside is basically closed, so that the idling stability can be greatly improved; the appearance and the connection way of the carburetor with the structure are the same as those of the common carburetor; the carburetor is simple to operate and control, and has higher reliability, and low manufacture cost.

Description

Two-stroke layered scavenging engine and carburetor

Technical field

The present invention relates to technical field of engines, particularly a kind of Small Universal two stroke engine is used Carburetor.

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; 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 C ()) 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 the characteristics of low emission, low oil consumption, receives consumers in general's favor, but has its gas handling system; The structure more complicated of Carburetor particularly; So poor reliability, and the higher shortcoming of price of complete machine are 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 needs a kind of simple in structure, good reliability, stable, the on the low side Carburetor of idling performance especially.

Summary of the invention

The purpose of this invention is to provide a kind of two-stroke layered scavenging engine and carburetor; This Carburetor is a single hole rotary valve structure, and its outward appearance and Placement are equal to common two stroke engine and use Carburetor, have both possessed the function of layered scavenging; Improved the discharging of pollutant greatly; Effectively reduce the fuel consume of motor, guaranteed the stability of engine idling operation state again, improved acceleration performance.

The technological scheme that the present invention takes is:

A kind of two-stroke layered scavenging engine and carburetor; Comprise Carburetor body, plunger, spindle, oil nozzle, horizontal baffle, air passageways, mixed gas passage; It is characterized in that: said Carburetor is a single hole rotary valve structure, through a horizontal baffle is set on the circular gas-entered passageway of plunger, it is divided into the air passageways of upside and the mixed gas passage of downside; Said horizontal baffle is set in place on said oil nozzle; During engine idling condition, plunger rotates the downside mixed gas passage is opened, and the upside air passageways is closed.

The invention has the beneficial effects as follows, compare, because this Carburetor possesses the function of layered scavenging with traditional Carburetor; The fresh air that flows into from air passageways during scavenging at first carries out scavenging, and the inflammable mixture that flows into from mixed gas passage afterwards carries out scavenging again, has significantly reduced the escape of unburned inflammable mixture like this; Reduce harmful components (HC+NOx) content in the tail gas thereby reach, improved the discharging of pollutant greatly, and effectively reduced the fuel consumption rate of motor; Owing to close air passageways during engine idling condition, open mixed gas passage, make idling stable; Acceleration performance is good; Adopt its outward appearance of Carburetor and Placement and the common Carburetor of this structure identical simultaneously, make that complete machine outward appearance and manipulating mechanism of oil throttle need not to change, simpler with its structure of complete machine that adopts the diplopore Carburetor, reliability is higher.

Description of drawings

Fig. 1 is the two-stroke layered scavenging motor schematic representation of assembling Carburetor of the present invention

The scheme schematic representation of Fig. 2 Carburetor of the present invention when engine idle

The scheme schematic representation of Fig. 3 Carburetor of the present invention when high engine speeds

Fig. 4 air feeder structure schematic representation

Sequence number explanation in the accompanying drawing: 1, empty filter; 2, Carburetor; 3, suction tude; 4, cylinder body; 5, spark plug; 6, piston; 7, swing frame; 8, body; 9, gas-entered passageway; 10, spindle; 11, oil nozzle; 12, plunger; 13, air passageways; 14, mixed gas passage one; 15, horizontal baffle one; 16, air passageways two; 17, mixed gas passage two; 18, horizontal baffle two; 19, air air storing cavity; 20, suction port.

Embodiment

Like Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, Carburetor 2 of the present invention is made up of swing frame 7, body 8, gas-entered passageway 9, spindle 10, oil nozzle 11, plunger 12, air passageways 1, mixed gas passage 1, horizontal baffle 1.

The A face of Carburetor 2 is connected with empty filter 1; The B face of Carburetor 2 is connected with suction tude 3; Horizontal baffle 1 is placed in the circular gas-entered passageway 9 of plunger 12; Gas-entered passageway 9 is divided into two relatively independent upside air passagewayss 1 and downside mixed gas passage 1, and spindle 10 passes horizontal baffle 1, oil nozzle 11 be positioned at horizontal baffle 1 below; Horizontal baffle 1 is connected with horizontal baffle 2 18, and air passageways 1 communicates with air passageways 2 16, and mixed gas passage 1 communicates with mixed gas passage 2 17; Be respectively arranged with air air storing cavity 19 and suction port 20 on the cylinder body.

Swing frame 7 is connected with plunger 12 and spindle 10, and pulling swing frame 7, plunger 12 drive spindle 10 rotations and rise or descend.

The concrete working procedure of the present invention:

When swing frame 7 drive plungers 12 are raised spindle 10; In the up process of piston 6; The inner negative pressure that forms of crankcase, under the effect of atmospheric pressure, mixed gas passage one 14 inner high speed flow air with fuel oil from oil nozzle 11 sucking-offs and with its rapid atomizing; Form inflammable mixture; This mixed gas is inhaled in the crankcase through mixed gas passage 2 17, suction port 20, and simultaneously pure air gets on the cylinder body in the air air storing cavity 19 from air passageways 1, air passageways 2 17 and one-way valve, and enters near the cylinder body scavenging port through the air passageways that is communicated with scavenging air belt.After the mixed gas of piston 6 tops is lighted by spark plug 5, the acting of expanding rapidly, it is descending to promote piston 6; Mixed gas in the compression crankshaft case, when piston 6 during near lower dead center, the cylinder body Exhaust Open; Part waste gas is discharged to the atmosphere through baffler from relief opening, and along with piston 6 is further descending, the cylinder body scavenging port is opened; The inflammable mixture that is compressed is pressed into fresh air in the cylinder body 4 through the cylinder body scavenging air belt from scavenging port, this moment fresh air preceding, inflammable mixture after; Waste gas after burning is discharged from relief opening, realized the work overall process of layered scavenging.When engine idling operation, promptly the throttle rope moves down swing frame 7 drive plungers 12, makes air passageways 1 be 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, improved the discharging of pollutant greatly, and effectively reduced the fuel consumption rate of motor, improved economic benefit.

Claims

1. two-stroke layered scavenging engine and carburetor; Comprise Carburetor body, plunger, spindle, oil nozzle, horizontal baffle, air passageways, mixed gas passage; It is characterized in that: said Carburetor is a single hole rotary valve structure, through a horizontal baffle is set on the circular gas-entered passageway of plunger, passage is divided into the air passageways of upside and the mixed gas passage of downside; Said horizontal baffle is set in place on said oil nozzle; During engine idling condition, plunger rotates the downside mixed gas passage is opened, and the upside air passageways is closed.