JPH02188657A - Device for interlocking throttle valve of multiply connected carburetor - Google Patents

Abstract

PURPOSE:To reduce a friction loss and prevent the occurrence of phase difference between throttle valves by installing winding wheels on a plurality of throttle valve stems, fixing flexible members on the winding wheels, and providing resilient bodies for energizing the throttle valve stems in the valve closing directions, respectively. CONSTITUTION:A plurality of carburetors 11A, 11B are placed on the same axes as each corresponding cylinder 12A, 12B on each bank and thereby, the height positions of intake air passages 17A, 17B are differentiated while crossing the directions of the passages. When a turning force in the valve opening direction is applied to a throttle valve stem 18A on a prime mover side, a throttle valve 19A fixed to the throttle valve stem 18A is opened. At the same time, a throttle valve stem 18B which is linked to the throttle valve stem 18A via a plurality of winding wheels 23A, 23B and a wire 24 is also rotated in the valve opening direction to open a throttle valve 19B fixed to the throttle valve stem 18B. On the other hand, as the turning force is removed, the throttle valve stems 18A, 18B are rotated in the valve closing directions by means of return springs 25A, 25B.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a throttle valve interlocking device for a multiple carburetor suitable for use in internal combustion engines such as marine propulsion machines.

[Conventional technology]

2. Description of the Related Art Conventionally, for example, some internal combustion engines for outboard motors are equipped with a multiple carburetor configured of a plurality of carburetors connected to a main body of the internal combustion engine.

Furthermore, when this multiple carburetor is installed in, for example, a V-type internal combustion engine, and the carburetors of each cylinder in the left and right banks are arranged on the same axis as the corresponding cylinder in each bank, it is necessary to The height positions of the intake passages are different from each other, and the intake passages are arranged so that their passage directions intersect with each other.

However, conventionally, as mentioned above, the throttle valves of multiple carburetors configured such that the height positions of the intake passages of each carburetor are different from each other and the passage directions of the intake passages cross each other are interlocked. If this is desired, a connecting arm is provided on each throttle valve shaft of adjacent revaporizers, and both connecting arms are connected by a link.

[Problems to be Solved by the Invention] However, in the conventional throttle valve interlocking device of the multiple carburetor, friction loss occurs between each connecting arm and the link. or,
Of the rotational force of the throttle valve shaft, which is the driving side, only the axial component of the link is extracted, and the force of this component rotates the throttle valve shaft, which is the driven side, and the rotation angle of both throttle valve shafts is This produces a phase difference.

In order to reduce the above phase difference, an intermediate rotary shaft is added between the two throttle valve shafts, and the throttle valve shaft, which is the driving side, and the intermediate rotary shaft are linked, and the throttle valve shaft, which is the driven side. It is also conceivable to connect the intermediate rotating shaft with a link. In silence,
In this case, there are disadvantages such as an increase in the number of component parts and poor assembly workability.

The present invention simplifies the configuration when interlocking the throttle valves of multiple carburetors in which the height positions of the intake passages of each carburetor are different and the passage directions of the intake passages are arranged to cross each other. In addition, the purpose is to minimize friction loss and to prevent a phase difference between both throttle valves.

[Means for Solving the Five Problems] The present invention comprises a plurality of carburetors connected to an internal combustion engine main body, the height positions of the intake passages of each carburetor are irregularly different, and the height positions of the intake passages are In a throttle valve interlocking device for multiple carburetors arranged so that the passage directions cross each other, each throttle valve shaft of adjacent revaporizers is extended to an intermediate region of the revaporizer, and both throttle valve shafts are connected to each other. The driving winding wheel is attached to the extending end of the throttle valve shaft that is the driving side, and the driving winding wheel is attached to the extending end of the throttle valve shaft that is the driven side and has the same diameter as the wheel. For wrapping, a wheel is attached, and for both wrapping, both ends of the flexible member are wrapped and fixed around each wheel, and the flexible member applies rotational force in the valve opening direction to the throttle valve shaft, which is the driving side. When the motor winding is applied, the approach route is on the same plane as the car's winding surface. The driven winding is set so as to be unwound from the vehicle and rotate the throttle valve shaft on the driven side in the opening direction, with the exit route being on the surface, and furthermore, on both throttle valve shafts,
When no rotational force in the valve opening direction is applied to the throttle valve shaft, which is the driving side, an elastic body is provided that can rotate each of the throttle valve shafts in the valve opening direction. .

[Effect] According to the present invention, there are the following effects.

■The windings attached to the extending ends of both throttle valve shafts are fixed to the wheels, and the windings are fixed to the wheels, and the visible members are fixed to the wheels, and both throttle valve shafts are rotated in their respective valve closing directions. Since the projectile to be obtained is the only component, assembly workability is good and the structure is simple.

When the two throttle valve shafts are interlocked, the flexible member moves the driving winding to the vehicle's winding (using the approach path on the same plane as the J plane, the driving winding is smoothly wound around the vehicle, and the driven winding to the vehicle's winding). The driven winding is smoothly unwound from the car using the same plane as the winding surface of the car as the exit route.

Therefore, there are no sliding parts and friction loss can be minimized.

0 When the two throttle valve tr shafts are interlocked, the rotation angle ljk of the throttle valve shafts on the driving side and driven side is mediated by the amount of movement of a single flexible member, and the driving winding wheel and the driven winding wheel are relative to each other. Since they have the same diameter, there is no phase difference between the rotation angles of the two throttle valve shafts, and as a result, it is possible to prevent a phase difference between the two throttle valve shafts.

[Embodiment] Fig. 1 is a schematic diagram showing an internal combustion engine for an outboard line to which an embodiment of the present invention is applied, Fig. 213 is a schematic diagram showing the main part configuration of Fig. 1, and Fig. 3 is a schematic diagram showing the configuration of the main part of Fig. 1. FIG. 3 is a schematic diagram showing a synchronization adjustment mechanism.

In FIG. 1, numeral 10 is a V-type two-stroke internal combustion engine for an outboard motor, and numerals 11A and 11B are carburetors constituting the multiple carburetor of the present invention. Each carburetor 11A, IIB has 6 ki @ 12 A in left and right banks.

12B, it is connected to the crankcase 13 that constitutes the engine body. 14 is a cylinder block, 15 is a cylinder head, and 16 is a helad cover.

Here, each carburetor 11A, 11B has a corresponding cylinder 12. A, 12B, and as a result, the intake passage 17Δ of each carburetor 11A, 1113
, 17B are different from each other, and the height positions of the intake passage 1 are different from each other.
The passage directions of 7A and 17B are arranged to intersect with each other. In addition, each carburetor 11A, 11B has a throttle valve shaft 18A, 1813. Equipped with throttle valves 19A and L9[3, and reed valves 20A and 20B.
The crank chambers 2LA, 2 of each cylinder 12A, 12B via
111 (18Δ, 19A, 2O
A, 218 not shown).

Therefore, in the internal combustion engine 10, each of the above-mentioned carburetors 11A
, IIB, the air-fuel mixture generated in reed valves 20A, 20
13 to the crank chamber 21 of each cylinder 12A, 12I3
A, 211'3, and can be further supplied to the combustion chambers 22A, 2211 through the scavenging passages (not shown) of each cylinder.

However, in this embodiment, both carburetors 11A, 11
B, each throttle valve shaft 18A, 18[1 is connected to both carburetors 11A, I
Extending to the middle area of IB, both throttle valve shafts 188, 18
[In 1, the driving winding wheel 23A is attached to the extending end of the throttle valve shaft 18 which becomes the driving side, and the driving winding wheel 23A is attached to the extending end of the throttle valve shaft 18B which becomes the driven side. The driven winding having the same diameter as the wheel 23A is attached to the wheel 23 [S. still,
A rotational force in the valve opening direction is applied to the throttle valve shaft 18A by a remote control cable (not shown). Also, those two windings are car 23A.

Both ends of the wire 24 (visible member) are wound around and fixed to each of the wires 23B.

At this time, the wire 24 becomes the driving side, as shown in FIG. When one rotational force in the valve opening direction is applied to the throttle valve shaft 18A, the driving winding is taken up by the wheel 23A with the winding of the wheel 23A entering the same plane as the surface, and the driven winding is wound around the wheel 23A. The winding is set so that the winding of the wheel 23 [S is an exit path on the same plane as the surface, and the driven winding is unwound from the wheel 23B and rotates the throttle valve shaft 18B on the driven side in the 1v direction. ing.

Further, both throttle valve shafts 18A, 18I3 can be rotated in their respective valve opening directions when no rotational force in the valve opening direction is applied to the throttle valve shaft 18A, which is the driving side. Return springs 25A and 25B (bounce bodies) are provided. In addition, the return spring 25A,
25B indicates each throttle valve shaft 188, 18 as shown in FIG.
[The winding in 3 is arranged around the opposite end of the wheels 23A and 23B.

Further, one winding wheel 23 [3 is attached with bolts 27B to a mounting plate 26B which is fixed to the corresponding throttle valve shaft 1813 by welding or the like, as shown in FIG. At this time, the winding wheel 23B is provided with a long hole 28B through which the bolt 27IS is inserted, and the mounting angle position relative to the mounting plate 26B can be adjusted.

As a result, 1-car throttle valves 19A and 19B are ranked 111th in total: r
Under the condition trJ at R, the wire 24 is adjusted so that it is always stretched between the wheels 23Δ and 2313 without any slack, and as a result, the two throttle valves 19A and 19[3 are always synchronously connected. It is assumed that it can be linked to.

Next, the operation of the multiple carburetor will be explained.

In the internal combustion engine 10 shown in L, when the remote control operation cable applies torque in the valve opening direction 11 to the throttle valve shaft 18Δ, which is the driving side, the throttle valve 19A fixed to the throttle valve shaft 188 is opened. , and the throttle valve shaft 18A and the winding are wheels 23A, 2.
3B and the throttle valve shaft 18B connected via the wire 24 rotates in the valve opening direction in conjunction with the throttle valve shaft 18A, and as a result, the throttle valve 19B fixed to the throttle valve shaft 18B is opened. . Moreover, when the application of the rotational force in the valve opening direction by the remote control operation cable disappears, both throttle valve shafts 18A and 18B are rotated in the valve opening direction by the spring force of the return springs 25A and 25B, and as a result, the throttle valve shaft 18
Fixed throttle valves 19A and 19B are set to A and 18 [1 and 19A and 19B respectively.

However, according to the above embodiment, there are the following effects.

■The windings attached to the extending ends of both throttle valve shafts 18A and 18r3 are wheels 23A and 23B, and both winding wheels 23A and 23
The only components are the wire 24, which is fixedly wound around each of the throttle valve shafts 18A and 18I3, and the return springs 25Δ and 25B, which can be rotated in the respective valve opening directions of both throttle valve shafts 18A and 18I3. Good and simple configuration.

When the two throttle valve shafts 18A and 18[3 are interlocked, the wire 24
In this case, the driving winding is smoothly wound around the wheel 23A by using the approach path on the same plane as the winding surface of the driving winding,
The winding of the driven winding wheel 231 is smoothly unwound from the driven winding Jlt 23 B using the same plane as the exit route. Therefore, there are no sliding parts, minimizing friction loss.

■When both throttle valve shafts 18A, 18B are interlocked, the rotation angle X1↓ of the driving side and driven side throttle valve shafts 18A, 18B is the same.
The amount of movement of the wire 24 is used as an intermediary, and the drive winding is the same as that of the car 2.
3A and the driven winding wheel 23B have the same diameter "C," so there is no phase difference in the rotation angles of both throttle valve shafts 18A, 1813, and as a result, both throttle valves 19A, 19
It is possible to prevent a phase difference from occurring between B and B.

[Effects of the Invention] Hereinafter, according to the present invention as shown in L, the height positions of the intake passages of each carburetor are different, and the passage directions of the intake passages are arranged so as to intersect with each other in a °C configuration. When interlocking the throttle valves of a double-channel carburetor, the configuration is simplified and
Friction loss can be minimized and a phase difference between the two throttle valve shafts can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an internal combustion engine for fn external engine to which an embodiment of the present invention is applied, Fig. 2 is a schematic diagram showing the main part configuration of Fig. 1, and Fig. 3 is a synchronization l of the throttle valve. FIG. 3 is a schematic diagram showing the adjustment mechanism. 11A, 1113... Carburizer, 17A, 17B... Intake passage, 18Δ, 18B... Throttle valve f' 1lIill, 19
A, 19B... Throttle valve, 23A... Driving winding is for car, 23B... Driven winding is for car, 24... Wire (flexible member), 25A, 25I3... Return spring (elastic) outbreak). Agent Patent Attorney Osamu Shiokawa

Claims (1)

[Claims] (1) Consisting of multiple carburetors connected to the internal combustion engine main body, the height positions of the intake passages of each carburetor are different from each other,
In the throttle valve interlocking device for multiple carburetors, which are arranged so that the passage directions of the intake passages intersect with each other, each throttle valve shaft of both adjacent carburetors is extended to an intermediate region between both carburetors. A driving winding wheel is attached to the extending end of the throttle valve shaft that is the driving side of both throttle valve shafts, and the same as the driving winding wheel is attached to the extending end of the throttle valve shaft that is the driven side. A driven winding wheel of the same diameter is attached, and both ends of the flexible member are wound and fixed around each of the winding wheels, and the flexible member is rotated in the valve opening direction on the throttle valve shaft that is the driving side. When a force is applied, the motor winding wheel is wound on the same plane as the winding surface of the driving winding wheel as an entry path, and the same surface as the winding surface of the driven winding wheel is the exit path. The throttle valve shaft on the driven side is unwound from the driven winding wheel and is set to rotate in the valve opening direction, and the throttle valve shaft on the driven side is further provided with a rotational force in the valve opening direction on the throttle valve shaft on the driving side. When is not added,
A throttle valve interlocking device for a multiple carburetor, characterized in that an elastic body is disposed to rotate each of the throttle valve shafts in the valve closing direction.