CN1057053C - Gas absorbing system equipment of motorbicycle - Google Patents

Abstract

The invention relates to an air suction system device of a two-wheeled motorcycle. In the space between the cylinder 16 in front of the carburetor 17 and the fuel tank bottom plate 22 of the fuel tank 12 above it, an air suction cover 12 expanding along the width direction of the vehicle body is set to close this space and prevent from The traveling wind that flows between the fuel tank 22 and around the carburetor 17 is generated to prevent the carburetor from freezing.

Description

Air intake system device for two-wheeled motorcycles

This application relates to a two-wheeled motorcycle air intake system device for effectively preventing icing of a carburetor and the like.

It is well known, for example, in Japanese Patent Application Laid-Open No. 5-69360 that a cover is installed on the suction pipe provided in front of the gasifier, and the suction pipe and the gasifier are covered with this cover.

In the above-mentioned conventional situation, when the motorcycle is running, the wind passing between the engine and the fuel tank located in front of the carburetor swirls around the carburetor, causing icing. Therefore, it is desired to invent a suction hood that can effectively prevent the generation of such driving wind.

The present invention relates to an air intake system device of a two-wheeled motorcycle, which has a main pipe extending rearward from the head pipe, above which the fuel tanks on the left and right are straddled, and is arranged below the fuel tank and the cylinder is connected from the crankshaft The box extends to the upper engine, and the engine air intake part is arranged behind the engine. The motorcycle air intake device according to the present invention is characterized in that it is provided with a plate-shaped air intake cover, and the air intake cover is drawn from the upper part of the above-mentioned cylinder. It extends upwards and contacts with the bottom plate of the above-mentioned fuel tank.

In addition, the suction hood can be made of elastic materials such as rubber or synthetic resin, and the cross-section of the bottom plate of the combustion box is in the shape of an inverted U with the left and right sides hanging down and the middle upwards. The shape bulges upwards. In addition, the lower part of the suction hood is fixed on the vehicle frame through a bracket.

Because the suction hood closes the space between the engine and the fuel tank, it prevents the driving wind from flowing through this space to the surroundings of the carburetor.

In addition, the upper central part of the air intake hood is embedded in the bottom space of the fuel tank and connected to the bottom plate thereof, and the bottom plate of the fuel tank becomes a stopper of the air intake hood for preventing driving wind.

This invention can effectively prevent the traveling wind from flowing between the fuel tank and the engine to the parts of the air intake system, and can prevent the carburetor and the like from freezing.

Moreover, if the air intake cover is made of elastic materials such as rubber and synthetic resin, its elasticity can be used to seal the circulation space of the traveling wind.

In addition, the upper central part of the hood is fitted into the space with an inverted U-shaped cross section along the shape of the bottom plate of the fuel tank, and the bottom plate of the fuel tank functions as a stopper for the hood to prevent driving wind. Moreover, the lower part of the air suction cover is fixed on the frame by brackets, which can prevent deformation caused by driving wind.

Embodiments of the present invention will be described below in conjunction with the accompanying drawings. in,

Fig. 1 is a partial side view of the car body part used in the embodiment;

Fig. 2 is the overall side view of the vehicle body part used in the embodiment;

Fig. 3 is the front view of the suction hood of the embodiment;

Fig. 4 is an enlarged view of the fixed part of the suction hood;

Fig. 5 is a partial sectional view of a support rod.

Embodiment description sees Fig. 1 to Fig. 5, among Fig. 2, in the front portion of vehicle frame, front wheel 1 is supported by front fork 2, and in the rear portion of vehicle frame, rear wheel 3 is supported by rear arm 4 equally. The frame is composed of the following components: a head tube 5 connected to the front fork 2, a main pipe 6 extending obliquely downward from the head tube 5, and a rear tube extending downward from the rear and supporting the front end of the rear arm 4 in the middle 7. The bottom pipe 8 extends downward in an L shape from the head pipe 5 and is connected to the lower end of the rear pipe 7 at the rear end, and the auxiliary pipe 9 connecting the bottom pipe 8 and the main pipe 6 is inclined upward and rearward from the rear end of the main pipe 6 The extended seat cushion rail 10 starts from the bottom of the bottom tube 8 and extends upwards obliquely to the rear bracket 11 connected with the seat cushion rail 10 .

The fuel tank 12 is supported above the main pipe 6, the seat cushion 13 is installed on the cushion rail 10, and the engine 14 is supported in the ring formed by the main pipe 6, the rear pipe 7, the bottom pipe 8 and the auxiliary pipe 9.

The engine 14 is provided with an upwardly extending cylinder at the front end of the crankcase 15 , and a gasifier 17 is connected to the intake port of the cylinder, and the gasifier 17 is connected to an air filter 18 . The air cleaner 18 is supported by the bottom pipe 8 , the seat cushion rail 10 , and the rear bracket 11 . A suction hood 19 is provided between the vaporizer 17 and the cylinder 16 .

As shown in Figures 1 and 3, the suction cover 19 is a plate-shaped member made of elastic materials such as rubber or synthetic resin, with a protruding part 30 above the center, embedded in the space 20 of the fuel tank 12 approximately in the shape of an inverted U (figure 1). The left and right sides 21 of the fuel tank 12 hang down along the sides of the main pipe 6 and the auxiliary pipe 9, and the bottom plate 22 of the fuel tank is also the outline of the space 20, and the section is in an inverted U shape.

The upper end and left and right edges of the protruding portion 30 are in contact with the fuel tank bottom plate 22 . The lower part 31 of the suction hood 19 is in close contact with the side of the end cover 23 ( FIG. 4 ) of the cylinder 16 .

On the lower back side of the suction cover 19, a belt-shaped support plate 33 is installed along the vehicle width direction, and a bracket 34 protrudes backward from the center of its end 32, and is fixed on the vehicle frame side by bolts 35.

In addition, at the rear end of the cylinder 16, a suction pipe 24 connected to the gasifier 17 is connected, and a hole 36 passing through the main pipe 6 and a hole 37 passing through the auxiliary pipe 9 are opened in the center of the suction cover 19, two holes Connect up and down in the middle.

In the hole 37, not only the auxiliary pipe 9, but also the wire hook 38 and the throttle valve adjustment wire 39 protruding from the upper part of the support plate 33 to the upper side pass through.

At the lower center of the suction cover 19, a slit 40 is formed from the lower edge of the hole 37 to the lower end of the side portion 21, so it is possible to install the suction cover across the top of the main pipe 6 and the auxiliary pipe 9.

In addition, as shown in Figure 5, a hole 41 is opened at the overlapping part of the two ends of the support plate 33. Using this hole 41, the two ends of the support plate 33 are bent and protrude from the back of the suction cover 19 to the front to form a stop. The movable part 42 and the end parts 43 are folded back along the edges of the left and right end parts 32 of the suction cover 19 to support the end parts 32 .

Bracket 34 as shown in Figure 4, for the support 46 protruding downwards by auxiliary pipe 9, adopt bolt 35 to connect, connect nut or be welded on the support 46, or on other parts.

In addition, a small hole 47 is provided above the bolt connection part of the bracket 46, and a part of the bracket 34 protrudes upward to form a rotation prevention part 48. The end part 49 of the rotation prevention part 48 fits in the small hole 47 to prevent rotation.

In Fig. 1, since the air intake cover 19 blocks the space formed between the cylinder 16 in front of the carburetor 17 and the bottom plate 22 of the fuel tank 12, it can prevent the cold running wind between the fuel tank 12 and the cylinder 16 from flowing to the air. The carburetor 17 effectively prevents the carburetor 17 and the suction pipe 24 from freezing.

Moreover, the suction hood 19 straddles the main pipe 6 and the auxiliary pipe 9 from above by using the slit 40, so the installation is very simple.

At this time, because the periphery of the protruding portion 30 is in contact with the fuel tank bottom plate 22, even if it is subjected to traveling wind, the fuel tank bottom plate 22 becomes a stopper to prevent deformation, and it is not necessary to set a special stopper, which is very reasonable.

In addition, the lower part 31 can be closely connected to the cylinder head cover 23 by virtue of elasticity, and is supported by the support plate 33 on the lower part of the air suction cover 19, so that it will not be deformed even if it is subjected to driving wind.

Moreover, the support plate 33 is fixed by only one bolt 35, and the installation is very simple.

Claims (4)

1. An intake system device for a motorcycle including a main pipe (6) extending rearward from a head pipe (5), a fuel tank (12) extending laterally above and laterally across the main pipe, an engine (14) having a cylinder (16) disposed below the fuel tank and extending upward from a crankcase, and an engine intake member disposed rearward of the engine (14); the method is characterized in that: a plate-shaped intake cover (19) is provided, and the intake cover (19) extends upward from the upper portion of the cylinder (16) and contacts the bottom plate of the fuel tank (12).

2. The intake system device for a motorcycle according to claim 1, wherein: the suction cover (19) is made of an elastic material such as rubber or synthetic resin.

3. The intake system device for a motorcycle according to claim 1, wherein: the cross section of the fuel tank bottom plate is in an inverted U shape with the left and right sides hanging down and the middle sinking upwards, and the air suction cover (19) protrudes upwards along the center of the shape of the combustion tank bottom plate.

4. The intake system device for a motorcycle according to claim 1, wherein: the lower part of the air suction cover (19) is fixed on the frame through a bracket (46).

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