JP2000008826A - Polluted lubricating oil extracting method in replacement of lubricating oil of combustion engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To approximately completely discharge the polluted lubricating oil by mounting an air inlet on a cap of a lubricating oil inlet of a combustion engine, naturally making the polluted lubricating oil flow down to be discharged from a drain port in the replacement of the lubricating oil, and blowing the compressed air from the air inlet to forcibly discharge the residual lubricating oil. SOLUTION: A lubricating oil filling cap A mounted on an air inlet B is mounted on, for example, a lubricating oil filling port of an automobile engine. This air inlet B is same as, for example, an air inlet of a tire, and any air inlet will do so far as it is closed by a cap even through it does not have a valve. To replace the lubricating oil of the automobile engine, the lubricating oil is naturally made to flow down to be discharged from a drain port of an oil pan, and then the compressed air is blown from the air inlet B to forcibly discharge the lubricating oil attached and remained in the automobile engine. Whereby the polluted lubricating oil can be approximately completely discharged, and the lubricating oil to be newly filled, can be prevented from being polluted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for extracting polluted lubricating oil when replacing lubricating oil in a combustion engine such as an automobile engine.

[0002]

2. Description of the Related Art Conventionally, when exchanging lubricating oil for a combustion engine such as an automobile engine, when extracting polluted lubricating oil, the oil is drained from a drain hole provided in an oil pan by natural flow for a considerable time. Later, a new amount of lubricating oil was filled from a filling port provided in the cylinder head by closing the drain hole.

[0003] In addition, after extracting the polluted lubricating oil by the natural flow as described above, the engine is started for a short time in that state, and the polluted lubricating oil adhering mainly around the crankshaft is scattered and discharged. The method was sometimes performed.

[0004]

In the conventional lubricating oil extracting method in which the combustion engine is started for a short time only after the natural flow or after the natural flow, it takes a long time to extract the polluted lubricating oil having a high viscosity. A considerable amount of contaminated lubricating oil that remains in every corner of the combustion engine or adheres to the inner wall of the combustion engine remains as it is, and this remaining contaminated lubricating oil mixes with newly filled lubricating oil, so that new lubricating oil is used. There was a problem that it was polluted from the beginning.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a method of replacing lubricating oil by injecting compressed air into a combustion engine when polluted lubricating oil flows almost spontaneously. The remaining polluted lubricating oil will be forcibly discharged. In this manner, the polluted lubricating oil remaining inside the combustion engine can be almost completely discharged, and contamination of the newly injected lubricating oil can be prevented, and good lubrication can be achieved.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a combustion engine, in which an air injection port is attached to a lubricating oil filling port cap, and when the lubricating oil is replaced, most of the polluted lubricating oil is discharged from a drain hole by natural flow. This is a method of removing polluted lubricating oil in the replacement of lubricating oil in a combustion engine, by blowing compressed air from the air inlet and forcibly discharging contaminated lubricating oil remaining on the air.

[0007]

Embodiments will be described with reference to the drawings.
FIG. 1 shows a lubricating oil filling port cap A provided with an air inlet B.
In the automobile engine, the lubricating oil filling port provided at the top of the cylinder head is closed, and the cap of the air injection port B is removed.

Although the air inlet B is the same as the air inlet of the tire without the cap, the air inlet B may be closed without a valve as long as it can be closed with the cap.

Next, the results of experiments conducted by the present inventors will be described. Test combustion engine: 6-cylinder 2800CC automobile engine The air injection port B for a tire is attached to the lubrication oil injection port cap A of the above-mentioned automobile engine, and the lubrication oil injection port cap shown in FIG. did. The amount of lubricating oil discharged to the last drop under gravity was about 4.0 l.
Subsequently, compressed air of 1.5 atm was supplied through the air inlet B for about 6
As a result of blowing for 0 second, about 300 cc of pure black dirty lubricating oil was discharged.

Considering the above results, when a new lubricating oil is injected after the conventional extraction by gravity flow,
It is known that a heavy residue of about 300 cc is mixed with a new 5 l of lubricating oil, which impairs engine performance and reduces durability.

[0011]

The present invention is embodied in the form described above and has the following effects.

[0012] By simply modifying the parts to provide an air injection port in the lubricating oil filling port cap, compressed air can be blown into the engine to almost completely remove the contaminated lubricating oil, leaving no highly dirty lubricating oil. Therefore, the lubricating oil to be newly charged is not contaminated, and the purpose of replacing the lubricating oil can be sufficiently achieved, and the function and durability of the combustion engine can be enhanced.

In the case of an automobile engine, the replacement of lubricating oil is almost always carried out at a gas station. The residual contaminated lubricating oil can be easily removed by using a compressed air device for filling the tire which is always provided at the gas station. Can be discharged.

Since the newly filled lubricating oil is not contaminated by the remaining lubricating oil, the replacement cycle can be extended, which is economically advantageous.

[Brief description of the drawings]

FIG. 1 is a perspective view of a lubricating oil filling port cap used in the present invention.

[Explanation of symbols]

 A Lubricating oil filling port cap B Air injection port

Claims (1)

[Claims] 1. A lubricating oil filling port cap for a combustion engine (A)
An air injection port (B) is provided at the time of replacement of the lubricating oil, and after the polluted lubricating oil is largely discharged from the drain hole by gravity flow, the polluted lubricating oil adhering and remaining inside the engine is discharged to the air injection port (B). ), Wherein the compressed air is blown in and forcedly discharged, thereby removing polluted lubricating oil in lubricating oil replacement of a combustion engine.