JPS608097Y2 - Refueling device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an oil supply device for supplying lubricating oil to the intake port of a cylinder and mixing it with the air-fuel mixture in the intake port in a two-cycle separated refueling engine, and particularly improves the atomization of the lubricating oil. The present invention relates to an oil supply device that improves mixing with an air-fuel mixture.

Conventionally, in this type of oil supply device, the tip of the oil supply pipe is flush with the inner wall of the intake passage, or the oil supply pipe is slightly protruded into the intake passage.

However, since this conventional oil supply device has a structure in which lubricating oil is supplied into the intake hole only through the single oil supply pipe, the lubricating oil has poor mixing properties with the air-fuel mixture.
It is not possible to increase the mixing ratio of the air-fuel mixture to the lubricating oil, and therefore, the supply of lubricating oil to the cylinder piston and the bearing is uncertain, and it is necessary to supply a relatively large amount of lubricating oil.

The present invention has been made in view of the above points, and includes forming an oil chamber communicating with the oil pump in the intake passage, and providing a plurality of oil flow holes from the bottom of the oil chamber into the intake passage.
An oil guide is disposed in this oil flow hole so as to intersect with the intake passage.

With this configuration, the present invention promotes the atomization of the lubricating oil to improve its miscibility with the mixture, and as a result, improves the oil circulation to each part of the engine, reducing the amount of lubricating oil compared to the past. An object of the present invention is to provide an oil supply device that can reduce the amount of oil used.

Next, one embodiment of the present invention will be described with reference to FIGS. 1 to 3.

The oil supply body 1 is constructed by integrally joining an upper lid 2 and a main body 3. An oil chamber 4 is formed between the upper lid 2 and the main body 3, and an intake passage 5 is provided in the main body 3 below the oil chamber 4. is formed.

The oil supply body 1 is installed perpendicularly between the intake hole 7 of the cylinder 6 and the intake pipe 8 downstream of the carburetor, and communicates the intake passage 5 with the intake passage of the intake pipe 8 and the intake hole 7. There is.

Further, a banjo bolt 1 having a passage 9 is mounted on the upper lid 2.
Banjo union 11 is connected by 0,
The oil chamber 4 communicates with a lubricating oil pump via this banjo union 11 and a pipe (not shown).

The oil chamber 4 has a plurality of oil flow holes 12 in the longitudinal direction of its bottom surface, and an oil guide 13 having a T-shaped cross section for example. ...is hanging.

The oil guides 13 are suspended vertically and arranged in a line in a direction intersecting the intake passage 5.

A spacer 15 is interposed between the locking head 14 of the oil guide 13 and the bottom surface of the oil chamber 4 so that the locking head 14 floats to form an oil passage.

In addition, without forming an oil passage using this spacer 15, it is possible to make the width of the locking head 14 of the oil guide 13 narrower than the oil flow hole 12, or to form an oil passage directly in the locking head 14. It's okay.

Further, it is desirable that the oil guide 13 be made of a highly elastic material and be as thin as possible.

Further, there is play between this oil guide 13 and the oil flow hole 12, so that the lubricating oil in the oil chamber 4 flows down through the oil guide 13, and this oil guide 13 pulsates. It is configured to vibrate due to intake negative pressure, engine vibration, etc.

Next, the operation of the oil supply system of the present invention constructed as described above will be explained.

The lubricating oil in the oil chamber 4 flows through each oil flow hole 12.
The lubricating oil flows down from the oil guide 13... into the intake passage 5 below, and the lubricating oil flowing down is scattered by the air-fuel mixture in the oil guide 13..., becomes atomized, and is mixed with the air-fuel mixture. mixed.

In addition, since each oil guide 13 vibrates due to the pulsating intake negative pressure and engine vibration, the scattering and atomization of the lubricating oil flowing down through the oil guide 13 are promoted, and the lubricating oil and Improves mixing with the air-fuel mixture,
This improves the oil circulation to each part of the engine.

In addition, in this invention, the oil guide 13... is the main body 3.
It is also possible to adopt a structure in which the oil guide 13 is formed integrally with the oil guide 13 and the oil flow hole 12 is formed around the oil guide 13 .

Further, the lower end of the oil guide 13 may be fixed to the inner wall of the intake passage 5 or may be free, or may be stopped at a position within the intake passage 5.

As described above, the present invention forms an oil chamber that communicates with the oil pump into the intake passage, provides a plurality of oil flow holes from the bottom of the oil chamber into the intake passage, and connects the oil guide to the oil flow holes. Since the lubricating oil is disposed so as to intersect with the intake passage, atomization of the lubricating oil is promoted and its miscibility with the air-fuel mixture is improved.

As a result, the oil circulation to various parts of the engine is improved, and the amount of lubricating oil can be reduced compared to the conventional method, which has the effect of reducing the amount of oil used.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing one embodiment of the device of the present invention, Fig. 2 is a sectional view showing an example of how the device of the present invention is installed, and Fig. 3 is a sectional view of the device shown in Fig. 1.
It is a sectional view taken along the line -■. In the figure, 4 is an oil chamber, 5 is an intake passage, 6 is a cylinder,
7 is an intake hole, 8 is an intake pipe, 12 is an oil flow hole, and 13 is an oil guide.

Claims (1)

[Scope of utility model registration request] Provide an oil supply device between the cylinder intake hole and the carburetor 2
In a cycle separation refueling engine, an oil chamber that communicates with the oil pump is formed in the intake passage, a plurality of oil flow holes are provided from the bottom of the oil chamber into the intake passage, and an oil guide is installed in the oil flow holes to intersect with the intake passage. A refueling device characterized in that it is arranged so as to.