JPH0437828Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an engine breather piping for releasing changes in the internal pressure of the engine in a four-wheel buggy vehicle.

[Conventional technology]

In vehicles such as four-wheel buggies that travel off-road, the open end of the engine breather is installed on the completed vehicle to prevent water and mud from being sucked in from the engine breather when driving through deep water such as when crossing rivers. It is essential that it be placed as high as possible. Therefore, the applicant has provided a breather pipe whose base end is connected to a breather hole opened in the engine head on the upper side of a vertical pipe frame that connects the main pipe at the upper part of the vehicle body frame and the underpipe at the lower part. An engine breather connected to a breather pipe connection hole, having an atmosphere release hole formed on a side surface of the vertical pipe frame opposite to the breather pipe connection hole, and a discharge hole formed at the lower end of the vertical pipe frame. An application has already been filed regarding piping, and the present invention relates to an improvement of the technology related to this application.

[Problem that the invention attempts to solve]

In the conventional engine breather piping described above, by connecting the breather pipe to the vertical pipe frame, the breather gas is separated into gas and liquid within the vertical pipe frame, and the engine oil contained in the breather gas is separated and used as breather gas. The breather gas was discharged from the exhaust hole at the lower end of the vertical pipe frame, and the breather gas from which engine oil and the like contained therein were removed was discharged from the atmosphere vent hole of the vertical pipe frame. However, the section in the vertical pipe frame where gas-liquid separation is performed is short,
In addition, since the open end of the breather pipe and the atmosphere vent hole are close to each other, breather gas containing mist-like engine oil is discharged from the atmosphere vent hole, and the mist-like engine oil etc. adheres to the air vent hole. There were problems such as the area around the air vent hole in the vehicle body becoming dirty.

The present invention was developed in view of the above points, and it prevents water and mud from entering from the engine breather, prevents deterioration of engine oil due to water and mud, and prevents staining of the vehicle body due to breather gas released. The purpose is to provide engine breather piping for four-wheel buggy vehicles that can effectively prevent the problem.

[Means for solving problems]

As a means to solve the above problems, the present invention is arranged in the front and back direction on the upper part of the vehicle body frame,
It has a pair of left and right main pipes whose rear ends extend to the rear of the seat, a cross pipe that connects the two main pipes, and a vertical pipe frame that connects the cross pipe and a lower frame of the vehicle body frame,
In a four-wheel buggy vehicle with an engine mounted below the main pipe, a tip of a breather pipe whose base end is connected to a breather hole provided in an engine head of the engine is bored in the upper side surface of the vertical pipe frame. The vertical pipe frame is connected to the breather pipe connection hole, and communication holes are provided in the connecting portion of the vertical pipe frame and the cross pipe, and the connecting portion of the cross pipe and the main pipe, respectively, to communicate the interior spaces of the pipes. It is characterized in that a discharge hole is provided at the lower end of the seat, and an atmosphere release hole is provided at the rear end of the main pipe located behind the seat.

[Effect]

With the above configuration, the temperature of the engine becomes high and the internal pressure increases, and the breather gas containing engine oil, etc., sent into the vertical pipe frame through the breather pipe becomes gas-liquid within the vertical pipe frame. The engine oil, etc. that were separated and contained are condensed and discharged from the lower end of the vertical pipe frame as breather gum, and the breather gas, which has been separated into gas and liquid but still contains mist-like engine oil, etc., is It flows through the long main pipe via the cross pipe connecting the upper part of the vertical pipe frame, and after the mist of engine oil etc. is separated and removed as it passes through the cross pipe and the long main pipe. It is released from the atmosphere vent hole at the rear end of the main pipe located behind the seat.

Additionally, when the engine cools down and the internal pressure drops, air is sucked in through the breather pipe connected to the vertical pipe frame.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on the drawings.

The four-wheel buggy vehicle 1 is equipped with a pair of front wheels 2, 2 at the front of the vehicle body (left side in FIGS. 1 and 2) and a pair of rear wheels 3, 3 at the rear. 2,
2 and both rear wheels 3, 3, approximately in the center of the vehicle body,
An engine 4 is mounted to be supported by a vehicle body frame 5, and a saddle-type seat 6 is provided diagonally behind the upper part of the engine 4. A bar handle 8 for steering the wheels 2, 2 is provided.

Further, at the front part of the vehicle body, there is also a bonnet 9 made of synthetic resin that covers the front part of the vehicle body, and left and right front fenders 10, 10 that cover above and behind the pair of front wheels 2, 2. At the rear of the vehicle body, left and right rear fenders 11, 11 are integrally formed of synthetic resin and connected behind the seat 6, and cover the upper and front sides of the pair of rear wheels 3, and are supported by the vehicle body frame 5, respectively. It is provided.

On the other hand, the vehicle body frame 5 is bent into a substantially F-shape, and is arranged such that the front side of the vehicle body is inclined forward and downward from the mounting position of the engine 4, and the rear side from the upper center of the vehicle body is approximately horizontal. A pair of left and right main pipes 5a, 5a are bent into a substantially L shape, and the front ends are connected to the two main pipes 5a, 5a.
a, and extends substantially horizontally from the lower part of the vehicle body toward the rear of the vehicle body, is bent upward behind the engine 4, and has its rearmost upper end connected to the main pipes 5a, 5a, respectively. An upper cross pipe 5c connects the connected pair of left and right under pipes 5b, 5b and the pair of left and right main pipes 5a, 5a at an upper diagonal front of the engine 4.
, an undercross pipe 5d that connects the pair of left and right underpipes 5b, 5b diagonally in front of the lower part of the engine 4, and a vertical pipe frame 5e that connects the upper cross pipe 5c and the undercross pipe 5d on the center line of the vehicle body. The main pipes 5a, 5a are assembled by welding the connecting parts, respectively, and each of the main pipes 5a, 5a extends to the rear of the seat 6 of the vehicle body frame 5. A rear bumper attachment portion 15f is formed by flattening the rear end portion to attach the rear bumper 14.

Further, the engine 4 has a mounting portion 4b provided at one location on the front side of the vehicle body of the crankcase 4a, which is provided integrally in the lower part of the engine 4, to the lower part of the vertical pipe frame 5e via a bracket 12. At the same time, the mounting portions 4c formed at four locations, two on the top and two on the rear side of the vehicle body, of the crankcase 4a are attached to the mounting portions 4c provided on each rising portion at the rear of the pair of left and right under pipes 5b, 5b. The engine head 4d of the engine 4 is supported through set plates 13, 13 and disposed approximately in the center of the vehicle body.
It is located below the space a and behind the vertical pipe frame 5e.

Then, the engine head 4d of the engine 4
A breather hole 15 is formed in the engine breather hole 15, and a breather pipe 16 is provided with its base end connected to the breather hole 15. It is connected to the pipe connection hole 17 and opens into the vertical pipe frame 5e.

Further, the vertical pipe frame 5e has a discharge hole 1 at the lower end connected to the undercross pipe 5d.
8 is formed, and at the upper end connected to the upper cross pipe 5c, a communication hole 19 is bored in the side wall of the upper cross pipe 5c at the connecting portion, so that the inner space of the vertical pipe frame 5e and the hot water are connected to each other. The left end of the above-mentioned upper cross pipe 5c, which is connected to the inner space of the park cross pipe 5c and connected to the main pipe 5a on the left side (lower side in FIG. 4) of the vehicle body, is connected to the side wall of the main pipe 5a of the connected portion. A communication hole 20 is formed in the upper cross pipe 5c to communicate with the inner space of the left main pipe 5a.

Furthermore, at the rear end of the left main pipe 5a where the rear bumper attachment part 5f is formed, an atmosphere vent hole 21 is formed downward at the rear of the lower part of the seat 6. The breather gas introduced is connected to the vertical pipe frame 5e.
After gas and liquid are separated within the interior, the gas is discharged from a discharge hole 18 at the lower end of the vertical pipe frame 5e and an atmosphere vent hole 21 at the rear end of the left main frame 5a.

By configuring the engine breather piping as described above using the vehicle body frame 5, when the temperature of the engine 4 becomes high and the internal pressure increases, breather gas is sent into the vertical pipe frame 5e via the breather pipe 16.

This breather gas is sprayed in the crankcase 4a of the engine 4 and is sprayed onto the crankshaft, connecting rods, and pistons (not shown).
The breather gas containing this engine oil is separated into gas and liquid within the vertical pipe frame 5e, and the contained engine oil, water vapor, etc. are condensed. The breather gas is discharged as breather gum from the discharge hole 18 at the lower end of the vertical pipe frame 5e, and the breather gas, which has been separated into gas and liquid but still contains mist-like engine oil, etc., is opened at the upper part of the vertical pipe frame 5e. It first flows into the upper cross pipe 5c through the communication hole 19,
Next, the main pipe 5a on the left side is passed through the communication hole 20 opened at the left end of the upper cross pipe 5c.
The air flows inside the main pipe 5a on the left side toward the rear of the vehicle body, and is discharged to the atmosphere from the atmosphere opening hole 21 that opens at the rear end.

Therefore, the breather gas released from the atmosphere opening hole 21 passes through both the communication holes 19 and 20, which serve as orifices, and also passes through the long main pipe 5a to the atmosphere at the end. By being cooled before reaching the open hole 21, the engine oil, water vapor, etc. contained in the breather gas in the form of mist are separated and removed, and the main pipe 5a disposed behind the seat 6 is heated. Released from vents that open to the atmosphere.

Also, when the engine 4 cools down and the internal pressure decreases,
Air is sucked in through the breather pipe 16 connected to the vertical pipe frame 5e, but since the open end of the breather pipe 16 is located within the vertical pipe frame 5e and at a high position on the finished vehicle, it is difficult to cross the river. It can prevent water and mud from being sucked in from the breather pipe 16 even when driving in deep water, etc., and the discharge hole 18 serves as an air suction port.
The positions of the air release holes 21 are spaced apart from the positions where the tip of the breather pipe 16 is open, and there is an orifice-shaped communication hole 1 in the middle.
9 and 20, the suction of dust and the like is effectively prevented.

[Effect of idea]

As explained above, the engine breather piping for the four-wheel buggy vehicle according to the present invention is such that the tip of the breather pipe, whose base end is connected to the breather hole of the mounted engine, is bored into the upper side of the vertical pipe frame of the vehicle body frame. Connect to the breather pipe connection hole,
Communication holes are provided in the connecting portion between the vertical pipe frame and the cross pipe, and in the connecting portion between the cross pipe and the main pipe, respectively, to communicate the interior space of the pipes. Atmospheric vent holes are provided at the rear ends of the main pipes located at the rear of the engine, so water and mud do not enter through the engine's breather holes, preventing engine oil from deteriorating due to contamination with water and mud. At the same time, since mist-like engine oil and the like contained in the breather gas are effectively separated and removed, it is possible to effectively prevent the vehicle body from being soiled by the discharged breather gas.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a side view of a four-wheel buggy equipped with engine breather piping according to the present invention, Fig. 2 is a plan view of the same, and Fig.
The figure is an explanatory diagram showing the body frame that supports the engine and the engine breather piping formed using the body frame, and Figure 4 shows the vertical pipe frame connected to the upper cross pipe and the engine breather piping formed on the main pipe. FIG. 3 is an explanatory diagram showing a passage of breather gas. 1... Four-wheel buggy vehicle, 2... Front wheel, 3... Rear wheel, 4... Engine, 4a
...Crankcase, 4b, 4c...Mounting part, 4
d...Engine head, 5...Vehicle frame, 5
a...Main pipe, 5b...Under pipe,
5c... Upper cross pipe, 5e... Vertical pipe frame, 6... Seat, 15... Engine breather hole, 16... Breather pipe, 17...
Breather pipe connection hole, 18...Discharge hole, 19,
20...Communication hole, 21...Atmospheric release hole.

Claims (1)

[Scope of utility model registration request] A pair of left and right main pipes arranged in the front-rear direction on the upper part of the vehicle body frame and having their rear ends extending to the rear of the seat, a cross pipe connecting the two main pipes, and a lower frame of the vehicle body frame and the cross pipe. In a four-wheel buggy vehicle that has a vertical pipe frame that connects the main pipe and has an engine mounted below the main pipe, the tip of the breather pipe whose base end is connected to the breather hole provided in the engine head of the engine is connected to the main pipe. It is connected to a breather pipe connection hole drilled in the upper side of the vertical pipe frame, and a communication hole is provided at the joint between the vertical pipe frame and the cross pipe, and at the joint between the cross pipe and the main pipe, thereby reducing the internal space of the pipe. an exhaust hole at the lower end of the vertical pipe frame, and an atmosphere release hole at the rear end of the main pipe arranged behind the seat. Breather piping.