CN2733014Y

CN2733014Y - Isovacuum motorcycle carburetor

Info

Publication number: CN2733014Y
Application number: CN 03234705
Authority: CN
Inventors: 尹明善; 刘勇; 翁桃园
Original assignee: Lifan Industry Group Co Ltd
Current assignee: Lifan Technology Group Co Ltd
Priority date: 2003-05-30
Filing date: 2003-05-30
Publication date: 2005-10-12
Anticipated expiration: 2013-05-30

Abstract

The utility model discloses an isovacuum motorcycle carburetor. A vacuum chamber (5) is arranged at the upper part of a plunger (6), and a needle valve (3) which is integrally connected with the plunger is inserted into a main fuel supply hole (4). The isovacuum motorcycle carburetor is characterized in that the section of the needle valve (3) is diminished, and the flow amount of the main fuel supply hole (4) is 107.5 L per hour. The plunger type carburetor of the engine of motorcycles whose engine displacement is 125cc is changed into a vacuum carburetor, and the isovacuum motorcycle carburetor has the advantages of smaller air-fuel ratio, low engine displacement, uniform fuel supply of carburetor, and stable engine running.

Description

The equal vacuum motorcycle carburetor

One. technical field

The utility model relates to a kind of motorcycle, is specifically related to be used for the Carburetor of 125cc discharge capacity motorcycle.

Two. background technique

Along with the in-depth of motorcycle and engine development, various fangles, the continuous release of new architecture, the engine performance about the 125cc discharge capacity promotes very limited, therefore the improvement in performance of motorcycle is considered and the supporting Carburetor of motor more.At present Carburetor has two kinds of patterns: i.e. plunger type and equal vacuum formula.Regulate engine load and rotating speed by closure 1 aperture of regulating Carburetor, plunger type is formed the annular oil discharge passage (main oil supply hole) 4 of different cross section by manual drag-line 2 drive variable cross section spindles 3, this machinery type may cause when motor quickens, instantaneous oil mass supply overrich, cause engine emission to exceed standard, serious also may cause engine misses; And during engine retard, instantaneous oil mass was supplied rare engine misses that cause equally easily.

Constant-depression carburetor is controlled the circular crosssection of oil discharge passage owing to the variation of adopting inner air and outer air pressure Pa-Pl, the formation of its inner air and outer air pressure difference needs a change procedure: promptly relative plunger type carburetor, the oil discharge passage changes of section is slower, it is steadily excessive when the different operating change of state that this helps motor, effectively solved the shortcoming of plunger type carburetor.The motorcycle engine of former 125cc discharge capacity is the plunger type carburetor of configuration, and under the trend of present " motorcycle fashion ", the one plunger type carburetor does not cooperate with the profile of 125cc discharge capacity motorcycle very to be coordinated; The above listed problem of its two existence, bigger such as air fuel ratio, the discharge amount height, the roughness of engine is fixed.

Three. summary of the invention

The purpose of this utility model provides a kind of equal vacuum motorcycle carburetor.It changes the plunger type carburetor of 125cc displacement motorcycle engine configuration into constant-depression carburetor, and free combustion is smaller, and discharge amount is low, and the Carburetor fuel feeding is even, the advantage that engine running is stable.

For reaching the above-mentioned purpose the technical solution of the utility model be: vacuum chamber is arranged on the top of plunger, and the spindle that is connected as a single entity with plunger is inserted in the main oil supply hole, it is characterized in that: with the reduced cross-sectional of spindle, the flow that makes main oil supply hole is 107.5 liters/hour.

The beneficial effects of the utility model are: because the cross section parameter of spindle 3 is dwindled than raw parameter, the flow that makes main oil supply hole is 107.5 liters/hour, utilize inner air and outer air pressure change in the constant-depression carburetor and control the circular crosssection of oil discharge passage, because the formation of inner air and outer air pressure difference needs a change procedure, Carburetor oil discharge passage changes of section is slower, makes the Carburetor fuel feeding even, and the engine emission amount is reduced, engine running is steady, and air fuel ratio is little.

Four. description of drawings

Fig. 1 is the plunger type carburetor structural drawing;

Fig. 2 is the constant-depression carburetor structural drawing.

Five. embodiment

Vacuum chamber 5 is arranged on the top of plunger 6, and the spindle 3 that is connected as a single entity with plunger is inserted in the main oil supply hole 3, and the cross section of spindle 3 is reduced, and makes the flow of main oil supply hole 4 increase to 107.5 liters/hour by 102.5 liters/hour.The aperture size of control closure 1, make the variation (Pa-Pl) of inner air and outer air pressure, promoting plunger moves up or down, drive spindle 3 motion up or down in main oil supply hole, control the aperture size of main oil supply hole 4 and the circular crosssection of control oil discharge passage, with control oil discharge passage changes of section, guarantee that the Carburetor fuel feeding is even, motor is changed when the different operating state steadily.

Claims

A kind of equal vacuum motorcycle carburetor, vacuum chamber (5) is arranged on the top of plunger (6), and the spindle on the plunger (3) is inserted in the main oil supply hole (4), it is characterized in that: with the reduced cross-sectional of spindle (3), the flow that makes main oil supply hole (4) is 107.5 liters/hour.