CN2146575Y

CN2146575Y - Carburettor for Model-250 motorcycles

Info

Publication number: CN2146575Y
Application number: CN 92243903
Authority: CN
Inventors: 王海生
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-12-15
Filing date: 1992-12-15
Publication date: 1993-11-17
Anticipated expiration: 2002-12-15

Abstract

The utility model relates to a carburettor for Model-250 motorcycles, which is composed of a cross body (1) and a float chamber (2), wherein, the float chamber (2) is installed at the right side of the cross body (1). A float needle valve seat (3) is installed in a threaded hole (5) on a float chamber cover (4) by threads; a watching hole (7) is arranged on a float chamber body (6). When a throttling gate valve (8) installed in the cross body (1) closes tightly a throttle gate (9), the length of the maximum diameter segment of a jet needle (10) being inserted into a main jet hole (11) is not less than 8 mm. The utility model has no manual oil pouring device, direct starting and no pollution; the carburettor running one hundred kilometers at economical speed can save fuel oil 0.6 liter.

Description

Carburettor for Model-250 motorcycles

The utility model is a kind of Carburetor that is used on homemade 250 motorcycles.

The Carburetor that uses on homemade 250 motorcycles is the float chamber left-arranged type at present, hand primer is housed on float chamber cover, press hand primer with hand during startup, float is pushed away downwards, the float band the float pin and is broken away from the float needle valve seat, to the excessive oiling of float chamber, make cross body fuel head reach the startup rating value, satisfy the needs of ato unit.

There is following shortcoming in this Carburetor:

1. float chamber is contained in cross body left side, must be during startup with left-leaning 15 degree of motorcycle, cause the float chamber position to reduce relatively, must inject excessive fuel oil to float chamber for oily plane in the cross body being reached start rating value, vehicle body is set upright and is caused the float chamber position to raise relatively behind the motorcycle initiating, the oil that inject flow to the cross body more, and the needed oily plane rating value that travels of motorcycle this moment is lower than the startup rating value, and the result causes a large amount of wastes of fuel oil;

2. because must be when starting, and can't see and actual oily level in the float chamber usually cause fuel oil from the hand primer hole, to release, not only cause waste, and caused serious pollution with hand primer to the float chamber oiling;

3. the float pin is contained on the float by ring card and pin on the float shank, adjusts oily level and can only carry out on limited several levels, can not adapt to the requirement of various vehicle conditions to oily level;

4. the throttler valve in the cross body is too high, and after throttler valve was closed closure tight, jet needle can not be closed the main jet oilhole fully tight, thereby mixed gas concentration can't be controlled to ideal state, has had a strong impact on atomizing effect, causes the serious waste of fuel oil;

5. the cylinder connecting sleeve on the cross body adopts ring clip, and is poorly sealed, causes the negative pressure loss, influenced the atomizing effect of Carburetor.

At present, the fuel consumption of 250 motorcycles when economic pace is travelled up to 3 liters/hundred kilometers.

The purpose of this utility model, promptly be to design a kind of Carburetor that is used on homemade 250 motorcycles, need do not use hand primer during startup, not pollution easy and simple to handle, can realize the stepless adjustment and the comparatively ideal atomizing effect of float chamber oil level are saved fuel oil.

The utility model is made up of cross body and float chamber, and float chamber is contained in the right side of cross body.The float needle valve seat is contained in the screw on the float chamber cover with screw thread made on it, is shaped on judas on the float chamber body.When the throttler valve of dress was closed closure tight in the cross body, the length that jet needle maximum diameter section is inserted the main jet oilhole was no less than 8 millimeters; Also be shaped on the joint sleeve of band base on the cross body, on base, be shaped on two mounting holes.

Compared with prior art, the utility model does not have hand primer, can directly start, do not pollute, save fuel oil, can realize that the stepless adjustment in plane of float chamber oil adapts to various vehicle condition requirements, atomizing effect ideal, economic pace are travelled and are saved 0.6 liter/hundred kilometers of fuel oils.

Accompanying drawing is an embodiment of the present utility model.

Accompanying drawing 1 is the float chamber partial schematic sectional view.

Accompanying drawing 2 is cross body partial schematic sectional view.

Accompanying drawing 3 is that formula general structure schematic representation is put on the float chamber right side.

Among the figure, 1 cross body, 2 float chambers, 3 float needle valve seats, 4 float chamber covers, 5 screws, 6 float chamber bodies, 7 judas, 8 throttler valves, 9 closures, 10 jet needles, 11 main jet oilholes, 12 joint sleeves, 13,14 mounting holes.

Below in conjunction with accompanying drawing the utility model is further described.

250 motorcycle carburetors of the present utility model are made up of cross body 1, float chamber 2.

Float needle valve seat 3 usefulness on it made screw thread be contained in the screw 5 on the float chamber cover 4, be shaped on judas 7 on the float chamber body 6.

When need are adjusted in the float chamber oily level (extreme higher position of float), only need turn the float needle valve seat and the float needle valve seat be risen or descend and get final product, realized stepless adjustment to oily level.

When adjusting oily level, can see actual oily level in the float chamber by judas, realize accurate adjustment to oily level.Judas are the effect in double as atmospheric equilibrium hole simultaneously also, utilizes judas that atmospheric pressure is passed on the oily plane of float chamber, makes oily plane obtain stable and maintenance.

2. when the throttler valve 8 of dress was closed closure 9 tight in the cross body 1, the length that the maximum diameter section of jet needle 10 is inserted in the main jet oilhole 11 was no less than 8 millimeters.Make the melting concn of air and fuel oil reach optimum value, thereby reach desirable atomizing effect, in motorcycle driving, save fuel oil.

3. also be shaped on the joint sleeve 12 of band base on the cross body 1, on base, be shaped on two

mounting holes

13,14.

In use, Carburetor is contained on the cylinder by mounting hole with bolt, makes Carburetor and being connected of cylinder reach the tightest degree, does not almost have the negative pressure loss, has improved the atomizing effect in the cross body indirectly, thereby has saved fuel oil.

Compare with using existing Carburetor, travel in economic pace, per 100 km can be saved 0.6 liter of fuel oil.

4. float chamber 2 is contained in the right side of cross body 1.

When starting motorcycle, left-leaning 15 degree of vehicle body cause the float chamber position to raise relatively, can guarantee that the oily level in the cross body reaches the startup rating value, and vehicle body is set upright behind the motorcycle initiating, and the oil that has injected in the float chamber can guarantee that the oily level of cross body reaches the rating value that travels.

Put on the float chamber right side, is optimum position of the present utility model.If engine working conditions is good, put also on a float chamber left side can proper functioning; When motor because of factor working condition such as aging when not good, the float chamber right side is put and can be guaranteed that motor normally starts work.

Claims

1,250 motorcycle carburetors are made up of cross body (1), float chamber (2), it is characterized in that: float needle valve seat (3) is contained in the screw (5) on the float chamber cover (4) with screw thread made on it, is shaped on judas (7) on the float chamber body (6).

2,250 motorcycle carburetors as claimed in claim 1, it is characterized in that: when closing tight, the length that the maximum diameter section of jet needle (10) is inserted in the main jet oilhole (11) is no less than 8 millimeters to the throttler valve (8) of dress with closure (9) in the cross body (1); Also be shaped on the joint sleeve (12) of band base on the cross body (1), on base, be shaped on two mounting holes (13), (14).

3, as claim 1,2 described 250 motorcycle carburetors, it is characterized in that: float chamber (2) is contained in the right side of cross body (1).