JPS6341558Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vaporizer, particularly a multiple vaporizer. In recent years, aiming to improve output, 1 per cylinder has been
There is a tendency to supply fuel with a carburetor, and for this reason multiple carburetors are installed. Generally speaking, in multiple vaporizers, each vaporizer is equipped with a constant liquid level control mechanism such as a float, float valve, and valve seat, which increases the number of parts, ease of assembly, etc., and increases the cost of the vaporizer. It is inviting high school.

Also, in recent years, many V-type engines have been produced, and since there are various V-type bank angles such as 45 degrees, 60 degrees, and 90 degrees, there are various carburetors for these V-type engines, such as 45 degrees, 60 degrees, and 90 degrees. It is necessary to prepare

This is because the closing force of the liquid level control mechanism, that is, the float and the float arm against the float valve, decreases depending on the inclination angle.

The multiple carburetor of the present invention was developed in consideration of these points, and by sharing the float chambers of adjacent vaporizers, the number of parts and the number of assembly steps can be reduced, resulting in an inexpensive multiple carburetor. The first objective is to provide a carburetor, and the second objective is to obtain a multiple carburetor having a liquid level control mechanism that can always obtain an appropriate liquid level control ability regardless of the installation state of the engine. purpose.

Hereinafter, one embodiment of the multiple vaporizer according to the present invention will be described with reference to the drawings. The multiple vaporizer consists of a first vaporizer main body 1 and a second vaporizer main body 2 that are adjacent to each other, and a float chamber main body 3 that is sandwiched between the first and second vaporizer main bodies 1 and 2.

The first carburetor main body 1 has an intake passage 4 passing through it,
A main nozzle 6 protrudes and opens into a ventilate section 5 provided in the middle, and a throttle valve 8 rotatably supported on a shaft 7 is disposed in the intake passage 4 on the downstream side of the ventilate section 5. Ru. The main nozzle 6 is immersed through a mixing pipe 9 and a main jet 10 below a constant liquid level XX in a float chamber, which will be described later.

On the opposing side surface 1A of the first carburetor main body 1 facing the second carburetor main body 2 (the right side from the intake passage 4 in the figure), there is a float chamber recessed portion having a circular tight collar portion 1B when viewed from the opposing side surface 1A. 1C is formed.

Incidentally, reference numeral 11 indicates screw holes drilled in the tight collar portion 1B, and the screw holes are bored, for example, at intervals of 45 degrees.

Further, an intake passage 24 passes through the second carburetor body 2, and a main nozzle 26 protrudes and opens into a ventilate part 25 provided at an intermediate part thereof, and a main nozzle 26 protrudes and opens in the intake passage 24 on the downstream side of the ventilate part 25. A throttle valve 28 rotatably supported on a shaft 27 is arranged.
The main nozzle 26 is immersed through a mixing pipe 29 and a main jet 30 below a constant liquid level XX in a float chamber, which will be described later.

The opposite side surface 2A of the second carburetor body 2 facing the first carburetor body 1 (intake passage 24 in the figure)
A float chamber concave portion 2C having a circular tight collar portion 2B when viewed from the opposing side surface 2A is formed on the left side surface.

Incidentally, reference numeral 21 indicates screw holes drilled in the tight flange portion 2B, and the screw holes are bored, for example, at intervals of 45 degrees.

The float chamber main body 3 has a hollow cylindrical shape with openings 3C and 3D on both sides 3A and 3B, and the opening 3C on one side is fitted with the tight collar 1B of the first carburetor main body 1. A circular tight flange 3E is provided, and an opening 3D on the other side is provided.
is provided with a circular tight flange 3F that matches and tightens the tight flange 2B of the second carburetor main body 2.

Both tight collar portions 3E, 3 of the float chamber main body 3
Holes 3G and 3H are drilled in F to match the screw holes 11 and 21 drilled in the tight flanges 1B and 2B of the first and second carburetor bodies 1 and 2, respectively.

The float chamber body 3 includes a fuel passage 40 connected to a fuel source (not shown) and a valve seat 4 disposed at the opening end of the fuel passage 40 to the float chamber body 3.
1, a float valve 42 for opening and closing the valve seat 41, and a float 45 rotatably supported by a pin 44 supported by an arm 43 erected from the inner wall of the float chamber main body 3. Control mechanism F
is placed. In order to obtain a multiple vaporizer, it is assembled as follows. First, the main nozzles 6 and 26 are assembled to the first and second carburetor bodies 1 and 2, and then the mixing tubes 9 and 29 and the main jets 10 and 30 are assembled.

Next, the shafts 7, 2 are attached to the first and second carburetor bodies 1, 2.
After inserting 7, assemble the throttle valves 8 and 28. In this state, the work of assembling the carburetor main body is completed, and the first and second carburetor main bodies 1 and 2 are in a subassembly state. Next, the valve seat 41 is press-fitted into the fuel passage 40 of the float chamber main body 3 and assembled, the float valve 42 is assembled to this valve seat 41, and then the pin 44 is inserted into the float 45 and attached to the arm 43.

In this state, the subassembly as the float chamber main body 3 equipped with the constant liquid level control mechanism F is completed. In this way, in the completed state of the subassembly of the first and second carburetor bodies 1 and 2 and the float chamber body 3, the circular tight collar portion 1B of the first carburetor body 1 and the second carburetor body 2 Both sides 3 of the float chamber main body 3 are connected to the circular tight flange 2B.
Match the openings 3C and 3D of A and 3B. At this time, the tight collar portions 1B and 2B of the carburetor bodies 1 and 2
The screw holes 11, 21 drilled in the float chamber body 3 are completely aligned with the blank holes 3G, 3H in the tight flanges 3E, 3F on both sides 3A, 3B of the float chamber main body 3, and then tightened with bolts 50. .

According to this, a float chamber G is formed by the float chamber recess 1C of the first carburetor main body 1, the float chamber main body 3, and the float chamber recess 2C of the second vaporizer main body 2. The following points should be particularly noted regarding this multiple vaporizer.

That is, the component parts necessary for the carburetor bodies 1 and 2 and the float chamber body 3 can be sub-assembled in advance. This includes, for example, the main nozzle 6, the mixing pipe 9,
It is possible to perform a negative pressure performance confirmation test on the carburetor bodies 1 and 2 individually before testing the main system including the main jet 10, thereby improving the workability.

Also, in the float chamber main body 3, both sides 3A,
3B, and the openings 3C and 3D are closed with a jig or the like, so that the float 45, the float valve 42,
The constant liquid level control mechanism F including the valve seat 41 can be used to easily test the liquid level, and it is sufficient to simply screw in the single parts that have passed the test with the bolts 50. This made it possible to significantly improve work efficiency.

Also, when installed on a V-type engine, etc.,
The angle at which the engine is mounted (called the bank angle) varies depending on the model, and it is necessary to change the longitudinal axis of the intake duct.

In the present invention, the axes are parallel and arranged in the vertical direction in the figure, but if the intake passages 4 and 24 need to cross each other, the float chamber main body 3 can be kept as it is. After rotating only the first and second carburetor bodies 1 and 2, align the tight flanges 1B and 2B of the carburetor bodies 1 and 2 with the tight flanges 3E and 3F of the float chamber body 3, and then tighten the bolts. 50, it is possible to adapt to any installation angle of the intake passages 4 and 24, and it is possible to provide a highly versatile carburetor.

In addition, since the float chamber G was sandwiched between each carburetor body 1 and 2, and the center of the float chamber G was placed approximately at the center of both carburetor bodies 1 and 2, changes in the liquid level when tilting were minimized. This made it possible to suppress the problem and improve the slope performance.

In this embodiment, the tight part of the carburetor main body is circular, but it is not limited to a circular shape and may be a regular polygon as long as it is symmetrical with respect to rotation.

According to the multiple vaporizer according to the present invention as described above,
By changing the angle of attachment of the carburetor body to the float chamber body, a single carburetor can be used for engines that require various types of attachment, and is particularly effective as a multiple carburetor for V-type engines. It is something. In addition, the test can be completed with the float chamber body and the carburetor body sub-assembled in advance, which significantly improves workability during assembly.Furthermore, the float chamber body can be attached to any carburetor body. It is possible to obtain a number of practical effects such as the ability to share the product, increase the mass production effect associated with the quantity background, and reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the multiple vaporizer according to the present invention. FIG. 2 is a perspective view of the carburetor main body and the float chamber main body that constitute the multiple carburetor. 1...First carburetor main body, 2...Second carburetor main body, 1A, 2A...Opposing side surface, 1B, 2B...Tight collar, 1C, 2C...Float chamber recess, 3A, 3
B... Both sides, 3C, 3D... Opening, 3E, 3
F...Tight collar, 3...Float chamber body, G...Float chamber, F...Constant liquid level control mechanism.

Claims (1)

[Claims for Utility Model Registration] On the side surfaces 1A, 2A of the carburetor bodies 1, 2 adjacent to each other opposite to the other carburetor bodies 2, 1, there is a circular tight collar portion 1B when viewed from the opposite side surfaces 1A, 2A,
The carburetor main bodies 1 and 2 are formed with float chamber recesses 1C and 2C having a diameter of 2B;
A cylindrical float chamber body 3 provided with circular tight flanges 3E, 3F that are tightened by circular tight flanges 1B, 2B provided on adjacent carburetor bodies 1, 2; connected to a fuel passage 40; a valve seat 41, a float valve 42 that opens and closes the valve seat;
A constant liquid level control mechanism F disposed in the float chamber main body 3 consisting of a float 45 that controls a float valve 42; Tight collar part 3E,
3F is closed with circular tight flanges 1B, 2B provided on opposite sides 1A, 2A of the adjacent carburetor bodies 1, 2 to the other carburetor bodies 2, 1, and the adjacent carburetor bodies 1, 2 are closed. A multiple vaporizer with a float chamber G formed between them.