CN201865811U - Vertical shaft engine air inlet system - Google Patents

Abstract

The utility model discloses a vertical axis engine intake system, which comprises an air filter (1) and a carburetor (2), and is characterized in that: the air filter (1) is vertically arranged at the tail of the engine body (4), The air outlet end of the air filter (1) is connected to the air intake end of the carburetor (2) through the air filter connecting pipe (5) arranged horizontally on the body (4), and the air outlet end of the carburetor (2) passes through The intake elbow (6) is connected with the intake port of the engine cylinder head. The utility model has the advantages of compact structure, convenient and quick disassembly, and high air intake efficiency.

Description

A Vertical Axis Engine Air Intake System

technical field

The utility model relates to an engine intake system, in particular to a vertical axis engine intake system.

Background technique

At present, the commonly used vertical axis engine air intake system is composed of an air filter, a carburetor, and a carburetor heat shield. The radiator heat shield is connected with the intake port of the engine cylinder head. The air first enters the air filter housing from the outside, and then passes through the filter element of the air filter. The large particles of dust and impurities in the air are blocked outside the filter element, and the pure air passing through the filter element flows through the carburetor throat through the carburetor choke valve. Negative pressure is formed at the mouth of the carburetor, and the gasoline in the float chamber of the carburetor is sucked out through the metering hole and mixed with the filtered air to form a combustible mixed gas. The mixed gas finally enters the intake port of the cylinder head and enters the combustion chamber when the intake valve is opened. Among them, the air filter is generally composed of a plastic shell and a paper filter element. The carburetor and the carburetor heat shield are usually made of aluminum alloy. The carburetor heat shield pad is generally made of oil-resistant, heat-resistant and non-asbestos materials. Some models have a short intake pipe between the intake port of the cylinder head and the carburetor, and there is no connecting pipe between the air filter and the choke valve of the carburetor on most models, but directly connected. Most of the existing air filters and mufflers have a symmetrical structure, and it is difficult for the shroud to cover them all. Usually, a part of the air filter or muffler is exposed, resulting in a large size of the whole machine and an uncoordinated appearance.

Utility model content

The purpose of the utility model is to provide a vertical axis engine intake system with compact structure and high intake efficiency.

The purpose of this utility model is achieved through such a technical scheme, a vertical axis engine air intake system, including an air filter and a carburetor, characterized in that the air filter is vertically arranged at the tail of the engine body, and the air outlet of the air filter The end is connected to the intake end of the carburetor through the air filter connecting pipe horizontally arranged on the body, and the gas outlet end of the carburetor is connected to the engine cylinder head intake port through the intake elbow.

In order to achieve a better sealing effect, a sealing groove is arranged on the connecting end of the intake elbow connected to the engine cylinder head intake passage, and an O-shaped sealing ring is arranged on the sealing groove.

In order to make the air intake of the carburetor smooth and the whole mechanism compact, the throat channel of the carburetor is parallel to the piston.

The air filter includes an air filter housing. The air filter housing is cylindrical with an upward opening. Air inlet holes are arranged on the circumference of the air filter housing. The air filter also includes a filter element arranged in the air filter housing. The air filter cover on the housing is connected by fastening bolts fixed on the air filter housing, and fastened by the lock nut cover arranged on the air filter cover, which makes the overall structure of the engine compact and convenient for disassembly and maintenance.

For a better sealing effect, a sealing groove is provided on the connecting end of the air filter connecting pipe to the air filter, and an O-ring is provided on the sealing groove,

In order to reduce engine exhaust emissions, a labyrinth exhaust pipe connection hole is provided on the air filter connection pipe, and the labyrinth exhaust pipe connection hole is connected to the exhaust gas labyrinth of the box body through a pipe.

In order to limit the position of the oil pipe line connected with the carburetor, an oil inlet pipe limiting plate is arranged on the air filter connecting pipe, and the oil inlet pipe limiting plate is two pieces.

In order to reduce weight, the air filter connecting pipe and intake elbow are plastic parts.

Owing to adopting above-mentioned technical scheme, the utility model has the following advantages:

1. The air filter connecting pipe and intake elbow are used to increase the intake length, increase the intake inertia, and help improve the performance of the engine at low and medium speeds;

2. The carburetor and the engine intake are connected by an intake elbow, which reduces the intake resistance. A sealing groove and an O-ring are set on the intake elbow to ensure the sealing effect;

3. The air inlet elbow is used between the carburetor and the engine inlet, which not only makes the carburetor closer to the body, but also has a more compact structure, and also has a good heat insulation effect;

4. The air filter is installed vertically, which not only greatly reduces the width of the whole machine, but also facilitates disassembly and maintenance, reducing packaging and transportation costs;

5. Both the air filter connecting pipe and the intake elbow are made of plastic parts, which reduces the weight of the whole machine;

In summary, the utility model has the advantages of compact structure, convenient and quick disassembly, and high air intake efficiency.

Description of drawings

The accompanying drawings of the utility model are as follows:

Fig. 1 is the structural representation of the utility model;

Figure 2 is a reference diagram of the use state;

Fig. 3 is a rear view of Fig. 1 with the air filter removed.

Detailed ways

Below in conjunction with accompanying drawing, the specific embodiment of the utility model is described in further detail, but the utility model is not limited to these implementation modes, and any improvement or substitution on the basic spirit of this embodiment still belongs to the claims of the utility model Scope of protection claimed.

Embodiment 1: as shown in Figure 1, 2, 3, a kind of vertical shaft engine air intake system comprises air filter 1 and carburetor 2, and air filter 1 is vertically arranged at engine body 4 tails, and the air outlet of air filter 1 The end is connected to the intake end of the carburetor 2 through the air filter connecting pipe 5 horizontally arranged on the body 4, and the gas outlet end of the carburetor 2 is connected to the engine cylinder head intake port through the intake elbow 6.

A sealing groove 15 is arranged on the connecting end of the intake elbow 6 connected to the engine cylinder head intake passage, and an O-ring 16 is arranged on the sealing groove.

The throat channel of the above-mentioned carburetor 2 is parallel to the piston.

The above-mentioned air filter 1 includes an air filter housing 7 , the air filter housing 7 is in the shape of a cylinder with an upward opening, and an air inlet hole 8 is arranged on the circumference of the air filter housing 7 .

The above-mentioned air filter 1 also includes a filter element 11 arranged in the air filter casing 7, the filter element 11 is connected with the air filter cover 12 arranged on the air filter casing 7 through fastening bolts 13 fixed on the air filter casing 7, and Fastened by a lock nut cover 14 provided on the air filter cover 12 .

A sealing groove 17 is arranged on the connecting end of the air filter connecting pipe 5 connected to the air filter 1, and an O-ring 18 is arranged on the sealing groove 17,

The air filter connecting pipe 5 is provided with a labyrinth exhaust gas pipe connection hole 9, and the labyrinth exhaust gas pipe connection hole 9 is connected with the exhaust gas labyrinth of the box through a pipe.

An oil inlet pipe limiting plate 10 is arranged on the air filter connecting pipe 5, and the oil inlet pipe limiting plate 10 is two pieces.

Above-mentioned air filter connecting pipe 5 and intake elbow 6 are all plastic parts.

The utility model works like this: the air first enters the air filter housing 7 from the outside, and then passes through the filter element of the air filter. The connecting pipe 5 enters the carburetor 2, and the gasoline in the float chamber of the carburetor 2 is sucked out through the metering hole and mixed with the filtered air to form a combustible mixed gas, which enters the engine intake port through the intake elbow 6 , into the combustion chamber when the intake valve opens.

Claims (10)

1. A vertical axis engine air intake system, comprising an air filter (1) and a carburetor (2), characterized in that: the air filter (1) is vertically arranged at the tail of the engine body (4), and the air filter ( The air outlet of 1) is connected to the air inlet of the carburetor (2) through the air filter connecting pipe (5) arranged horizontally on the body (4), and the air outlet of the carburetor (2) is connected through the air inlet bend The pipe (6) is connected with the intake port of the engine cylinder head. 2. The air intake system of a vertical axis engine according to claim 1, characterized in that: a sealing groove (15) is provided on the connection end of the intake elbow (6) connected to the engine cylinder head intake port, An O-ring (16) is arranged on the groove. 3. The vertical engine intake system according to claim 2, characterized in that: the throat channel of the carburetor (2) is parallel to the piston. 4. The air intake system of a vertical axis engine according to claim 3, characterized in that: the air filter (1) includes an air filter housing (7), and the air filter housing (7) is cylindrical with an upward opening , an air inlet hole (8) is arranged on the circumference of the air filter housing (7). 5. The vertical engine air intake system according to claim 4, characterized in that: the air filter (1) also includes a filter element (11) arranged in the air filter housing (7), and the filter element (11) and The air filter cover (12) set on the air filter shell (7) is connected by fastening bolts (13) fixed on the air filter shell (7), and is connected by the lock nut set on the air filter cover (12). Cover (14) is tight. 6. The vertical axis engine air intake system according to claim 5, characterized in that: a sealing groove (17) is provided on the connecting end of the air filter connecting pipe (5) connected to the air filter (1), and the sealing An O-ring (18) is arranged on the groove (17). 7. The vertical engine air intake system according to claim 6, characterized in that: a labyrinth exhaust pipe connection hole (9) is provided on the air filter connection pipe (5), and the labyrinth exhaust pipe connection hole (9) passes through The pipe is connected with the exhaust gas labyrinth of the box. 8. The vertical axis engine air intake system according to claim 1, 2, 3, 4, 5, 6 or 7, characterized in that: an oil inlet pipe limiting plate (10) is arranged on the air filter connecting pipe (5) ). 9. The vertical axis engine air intake system according to claim 8, characterized in that: the oil inlet pipe limiting plate (10) is two pieces. 10. The vertical engine intake system according to claim 9, characterized in that: the air filter connecting pipe (5) and the intake elbow (6) are both plastic parts.

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