KR20180036120A - Internal-combustion engines cleaner and cleaning method using the same - Google Patents

Abstract

The present invention relates to a cleaning agent for an internal combustion engine capable of effectively removing sediments such as carbon and sludge deposited inside the internal combustion engine by comprising water, ethoxylated propoxylated alcohol (C6-C12), tetrapotassium pyrophosphate, diethylene glycol monobutyl ether and aromatics, and capable of enhancing a working environment by not using a flammable substance, and a method for cleaning the internal combustion engine using the same.

Description

TECHNICAL FIELD [0001] The present invention relates to an internal combustion engine cleaner and an internal combustion engine cleaning method using the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0002]

The present invention relates to an internal combustion engine cleaner for cleaning the interior of an internal combustion engine and a cleaning method for an internal combustion engine using the same.

An internal combustion engine is an internal combustion engine that converts internal combustion energy into mechanical energy and is widely used in gasoline engines, diesel engines, propane engines, rotary engines or aircraft engines such as passenger cars, buses, trucks and motorcycles .

In recent years, domestic automobile brands have been continuously introducing GDI (Gasoline Direct Injection) engines, ie, vehicles equipped with gasoline direct injection engines, which inject fuel directly to cylinders to improve fuel efficiency and power output.

 However, in the case of the GDI engine, not only the fuel is injected in a high compression stroke but also the friction inside the engine is increased due to a strong explosive force inside the engine, which may weaken the durability of the engine, and the blow- by Gas is entwined with engine oil and sludge is made. In the case of an MPI (multi-point injection) engine, an injector injecting fuel injects fuel toward the intake valve, which can also serve as an effect of cleaning the intake valve. However, in the case of the GDI engine, The sediment such as carbon and sludge is accumulated on the intake valve relatively.

Since such deposits cause problems such as power drop and knocking, it is desirable to regularly clean the interior of the internal combustion engine.

In the cleaning method of the internal combustion engine, there is a method of disassembling each part of the internal combustion engine, cleaning sediments deposited on each part, removing the parts, and reassembling the parts. However, A method of cleaning the internal combustion engine by inserting a cleaning agent into the internal combustion engine is being developed.

Korean Patent No. 1227192 discloses an engine cleaning method for cleaning an internal engine of an engine, which includes an oil for an internal combustion engine, xylene, an antioxidant, a clean dispersant, a rust inhibitor, an extreme pressure agent, a silicone antifoaming agent, a viscosity index improver, Lubricant compositions have been disclosed, but they have a problem in that they can not effectively remove thickly accumulated sediments when they are added to fuel of engines.

Korean Patent No. 1227192 (Feb. 21, 2013)

It is an object of the present invention to provide an internal combustion engine cleaner capable of effectively removing sediments such as carbon and sludge deposited in an internal combustion engine and not using a flammable substance to improve a working environment and a method of cleaning an internal combustion engine using the same. .

In order to solve the above-mentioned problems, the internal combustion engine cleaner of the present invention comprises water, ethoxylated propoxylated alcohols (C6-C12), tetrapotassium pyrophosphate and diethylene glycol monobutyl ether Wherein the water comprises 70 to 85% by weight, and the ethoxylated propoxylated alcohol is 10 to 20% by weight based on 100% by weight of the internal combustion engine cleaner, Wherein the tetra-persium pyrophosphate is contained in an amount of 10 to 20% by weight, the diethylene glycol monobutyl ether is contained in an amount of 1 to 10% by weight, and the perfume is included in an amount of 1 to 3% by weight do.

Further, the internal combustion engine cleaning method of the present invention comprises the steps of: a) removing an ignition plug and an intake manifold of an internal combustion engine; b) injecting the internal combustion engine cleaner of the present invention into the combustion chamber through the spark plug hole or injecting it into the intake valve; c) leaving the sediment deposited inside the internal combustion engine for more than 1 hour; d) using a clean brush to remove deposits in the combustion chamber or intake valve for 3-5 minutes; e) sucking the removed sediment and the cleaning liquid using an inhaler; And f) removing the residue of the deposit by using two to three cracking or air guns.

 INDUSTRIAL APPLICABILITY The internal combustion engine cleaner of the present invention and the cleaning method of an internal combustion engine using the same can effectively remove sediments such as carbon and sludge accumulated in the internal combustion engine and can improve the working environment by not using flammable materials have.

1 is a view showing an intake valve before cleaning the internal combustion engine.
2 is a view showing an intake valve after internal combustion engine cleaning.

Hereinafter, the present invention will be described in more detail.

When a member is referred to as being " on "another member in the present invention, this includes not only when a member is in contact with another member but also when another member exists between the two members.

Whenever a part is referred to as "including " an element in the present invention, it is to be understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.

Further, the internal combustion engine described in this specification includes a combustion chamber or an intake valve.

In accordance with one aspect of the present invention, the internal combustion engine cleaner of the present invention comprises water, ethoxylated propoxylated alcohos (C6-C12), tetrapotassium pyrophosphate, diethylene glycol monobutyl ether It is possible to effectively remove deposits such as carbon and sludge deposited inside the internal combustion engine by using diethylene glycol monobutyl ether and fragrance, and by not using flammable substances such as LPG (Liquefied Petroleum Gas) So that the work environment of the operator can be improved. Further, water-soluble detergent containing water has an advantage that it is possible to shorten the time for removing the detergent residue during the conventional cleaning process.

The internal combustion engine cleaner according to one embodiment of the present invention is a type of water-based detergent containing a large amount of water, and does not contain a flammable substance such as LPG, thereby reducing the generation of toxic substances harmful to the operator and reducing the odor So that the work environment of the operator can be improved.

The water may be contained in an amount of 70 to 85% by weight, preferably 75 to 85% by weight, and more preferably 80 to 85% by weight based on 100% by weight of the entire internal combustion engine washing liquid. If the content of water is less than the above range, the detergency against hydrophilic contaminants may be deteriorated. If the content of water exceeds the above range, the content of the other components may be decreased to lower the effects.

In order for the internal combustion engine cleaner to effectively act on the deposit, the detergent must penetrate into the fine space of the deposit, so that the surface tension of the detergent must be small. Water contained in a large amount in the detergent may have a large surface tension as compared with other solvents, so that the surfactant may be used together to reduce the surface tension, thereby increasing the permeability of the deposit into the fine space.

According to one embodiment of the present invention, ethoxylated propoxylated alcohol (C6-C12) is contained as the surfactant. As described above, the surfactant has the effect of reducing the surface tension of water in the cleaning agent, thereby facilitating the penetration of the cleaning agent into the deposit, thereby improving the cleaning power.

The ethoxylated propoxylated alcohol (C6-C12) may be contained in an amount of 10 to 20% by weight, preferably 5 to 10% by weight based on 100% by weight of the total internal combustion engine cleaner. If the content of the ethoxylated propoxylated alcohol (C6-C12) is less than the above range, the surfactant may not act as a surfactant and the detergency of the internal combustion engine cleaner containing the ethoxylated propoxylated alcohol may be reduced. There is a problem in that the content of other components is decreased and the effects thereof are deteriorated.

According to an aspect of the present invention, the internal combustion engine cleaner includes tetrapotassium pyrophosphate as an emulsifier. The emulsifier serves to mix two kinds of liquids which are not mixed with each other. The emulsifier is added to remove the organic substances which are not easy to remove from the sediments deposited inside the internal combustion engine.

The tetrapotassium pyrophosphate may be contained in an amount of 10 to 20% by weight, preferably 5 to 10% by weight based on 100% by weight of the total internal combustion engine cleaner. When the content of tetrapotassium pyrophosphate is less than the above range, the removal power of the organic substances present in the internal combustion engine is reduced, and when the content exceeds the above range, the content of the other components contained together is decreased, thereby reducing the effects thereof .

According to one embodiment of the present invention, the internal combustion engine cleaner comprises diethylene glycol monobutyl ether as a passivating agent. The passivating agent is added to prevent the internal combustion engine cleaner containing it from easily freezing.

The diethylene glycol monobutyl ether may be contained in an amount of 1 to 10% by weight, preferably 1 to 3% by weight based on 100% by weight of the internal combustion engine cleaner. If the amount of the diethylene glycol monobutyl ether is less than the above range, the solubility of the diethylene glycol monobutyl ether may be lowered and the solvent may be impaired. If the diethylene glycol monobutyl ether is used in an amount exceeding the above range, the content of the other components may be decreased, .

According to one aspect of the present invention, the internal combustion engine cleaner includes a perfume. The fragrance is added in order to improve the work environment of the operator by improving the odor or the like which can be caused by the compound contained in the cleaning agent.

The flavoring agent is not particularly limited as long as it is used in the art. You can use Orange, sweet, ext. Separated by 8028-48-6.

The fragrance may be contained in an amount of 1 to 3% by weight based on 100% by weight of the total internal combustion engine cleaner. If the amount of the fragrance is less than the above range, the fragrance can not be properly performed. If it exceeds the above range, it may cause inconvenience to the operator due to excessive fragrance, and the content of the other components may be insufficient due to the excessive content. The problem may be degraded.

According to one embodiment of the present invention, the internal combustion engine cleaner may have a pH of 8 to 12. When the pH range of the internal combustion engine cleaner satisfies the above conditions, there is an advantage that damage (corrosion and the like) of components inside the internal combustion engine can be prevented while the internal combustion engine is cleaned by the cleaning agent.

According to an embodiment of the present invention, the self-ignition point of the internal combustion engine cleaner may be 150 ° C or higher, and the flash point may be 180 ° C or higher.

If the ignition point is less than 150 ° C, ignition may occur due to the heat remaining in the internal combustion engine when the internal combustion engine is cleaned. Therefore, the self-ignition point There is a danger.

If the flash point is lower than 180 ° C, there is a risk that a topic may be generated by an ignition source such as an electric device in the internal combustion engine when the internal combustion engine is cleaned.

According to an embodiment of the present invention, the freezing point of the internal combustion engine cleaner may be -5 DEG C or less. If the freezing point exceeds -5 ° C, there may be a problem in storage of the cleaning agent.

A cleaning method of an internal combustion engine according to another aspect of the present invention includes the following steps.

a) removing an ignition plug and an intake manifold of an internal combustion engine;

b) injecting the internal combustion engine cleaner of the present invention into the combustion chamber through the spark plug hole or injecting it into the intake valve;

c) leaving the sediment deposited inside the internal combustion engine for more than 1 hour;

d) using a clean brush to remove sediments in the combustion chamber or intake valve for 3-5 minutes;

e) inhaling the removed sediment and cleaning agent using an inhaler; And

f) removing the residue of the deposit with 2-3 cracks or using an air gun;

In this case, the injection amount of the internal combustion engine cleaner in the step b) is not particularly limited as long as the deposit deposited in the combustion chamber or the intake valve can be locked.

The clean brush used in step d) is not particularly limited as long as it can remove the deposit.

When the internal combustion engine is cleaned using the detergent according to the present invention as described above, it is possible to reduce the internal combustion engine cleaning time and improve the working environment (odor and the like) of the operator, There is an advantage that it can be removed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. , And it is natural that such variations and modifications fall within the scope of the appended claims. In the following Examples and Comparative Examples, "%" and "part" representing the contents are by weight unless otherwise specified.

Examples and Comparative Examples: Preparation of internal combustion engine cleaner

Internal combustion engine cleaners were prepared according to the respective constituents and contents shown in Table 1 below.

(Unit: wt%) Example Comparative Example 1 Comparative Example 2 Comparative Example 3 water 80 85 85 82 Surfactants ^{1 )} 5 - 10 10 Emulsifier ^{2 )} 10 10 - 5 Floating agent ^{3 )} 3 3 3 - Fragrance ^{4 )} 2 3 3 3 1) Ethoxylated propoxylated alcohols (Ethoxylated propoxylated alcohols)
2) Tetrapotassium pyrophosphate (Tetrapotassium pyrophosphate)
3) Diethylene glycol monobutyl ether (diethylene glycol monobutyl ether)
4) Orange, sweet, ext. (CAS No. 8028-48-6)

Experimental Example

Experimental Example 1: Measurement of pH

The pH of the internal combustion engine cleaner prepared in the above Examples and Comparative Examples 1 to 3 was measured using a pH meter (pH 450, manufactured by EUTECH), and the results are shown in Table 2 below.

Experimental Example 2: Measurement of flash point, flash point and freezing point

The ignition point, flash point and freezing point of the internal combustion engine cleaner prepared in the above Examples and Comparative Examples 1 to 3 were measured by the following methods, and the results are shown in Table 2 below.

1) Autoignition Point: The ignition point of the internal combustion engine cleaner prepared in the above Production Example was measured using the ASTM E-659 test method.

2) Flash point: The flash point of the internal combustion engine cleaner prepared in the above Production Example was measured using the ASTM D-93 test method.

3) Freezing point: The freezing point of the internal combustion engine cleaner prepared in the above Production Example was measured using the ASTM D-1177 test method.

Experimental Example 3: Corrosion stability and washing power experiment

A total of four combustion chambers and intake valves were cleaned using the internal combustion engine cleaner manufactured in the above-described Examples and Comparative Examples 1 to 3, using a 2015 type Alpeyon (EL300, GM KOREA). At this time, the exhaust amount of each alpone was 2,997 cc, and the running distance was described in Table 2 below.

First, the spark plug and the intake manifold of the internal combustion engine are removed, and the internal combustion engine cleaner manufactured in the above embodiment is injected into the combustion chamber through the spark plug hole. Or an intake valve. Thereafter, the sample was allowed to stand for one hour, and sediments deposited therein were removed using a brush (manufactured by Enesaiber Co., Ltd.). The remaining cleaning solution and sediments were removed using an inhaler (manufactured by Nissa Saver Co., Ltd.), and the remaining sediments were once again removed using an air gun (manufactured by Nissa Saver Co., Ltd.).

The cleaning operation using the cleaning agent prepared in Comparative Examples 1 to 3 was also carried out in the same manner as described above.

After the cleaning operation, the corrosion state (corrosion stability) and the state of removing sediments (washing power) were checked using an endoscope (manufactured by Techpia), and the results are shown in the following Table 2 based on the following criteria.

The state of the intake valve before the cleaning operation is shown in Fig. 1, and the state of the intake valve after completion of the cleaning operation using the above-described embodiment is shown in Fig.

<Corrosion stability evaluation standard>

○: no visible dark brown or black corrosion marks on the combustion chamber and intake valve

△: Dark brown or black corrosion marks were visually observed in the combustion chamber and the intake valve in small quantity.

X: Much dark brown or black corrosion marks were observed on the inside of the combustion chamber and on the intake valve

<Evaluation Criteria of Cleaning Power>

○: When the inside of the combustion chamber and the intake valve are visually checked, more than 80% of sediments are removed

△: When the inside of the combustion chamber and the intake valve are visually confirmed, 50 to 80% of the sediment is removed

X: When the inside of the combustion chamber and the intake valve are visually confirmed, less than 50% of the sediment is removed

distance driven
(km) pH Ignition point (℃) Flash point (℃) Freezing Point (℃) Corrosive force Cleaning power Example 40,000 10 - - -10 ○ ○ Comparative Example 1 38,000 9 - - -8 ○ △ Comparative Example 2 41,000 7 - - -9 ○ △ Comparative Example 3 39,000 8 - - -2 ○ ○

Referring to Table 2, in the case of the internal combustion engine cleaner (Examples) including all of the constituent components of the present invention, the range of pH and freezing point required in the present invention is satisfied, and the ignition point and the flash point are not measured, It is confirmed that both of corrosion stability and cleaning power are excellent. In contrast, when the surfactant was not contained in the constituent components of the present invention (Comparative Example 1), the detergency was lowered, and when the emulsifier was not contained (Comparative Example 2), the pH did not fall within the range required by the present invention, (Comparative Example 3), it can be confirmed that there is a problem in storage beyond the freezing point range required by the present invention.

Claims (3)

(C 6 -C 12, Ethoxylated propoxylated alcohols), Tetrapotassium pyrophosphate and Diethylene glycol monobutyl ether, and a flavoring agent, in an internal combustion engine cleaner containing water, water, ethoxylated propoxylated alcohols (C6-C12), tetrapotassium pyrophosphate and diethylene glycol monobutyl ether As a result,
Wherein the water is contained in an amount of 70 to 85% by weight based on 100% by weight of the internal combustion engine cleaner, the ethoxylated propoxylated alcohol is contained in an amount of 10 to 20% by weight, Wherein the diethylene glycol monobutyl ether is contained in an amount of 1 to 10% by weight, and the perfume is contained in an amount of 1 to 3% by weight. The method according to claim 1,
Wherein the internal combustion engine cleaner has a pH of 8 to 12, a flash point of 180 ° C or higher, an autoignition temperature of 150 ° C or higher, and a freezing point of -5 ° C or lower. a) removing an ignition plug and an intake manifold of an internal combustion engine;
b) injecting the internal combustion engine cleaner of any one of claims 1 to 2 into the combustion chamber through the spark plug hole or injecting it into the intake valve;
c) leaving the sediment deposited inside the internal combustion engine for more than 1 hour;
d) using a clean brush to remove sediments in the combustion chamber or intake valve for 3-5 minutes;
e) inhaling the removed sediment and cleaning agent using an inhaler; And
f) removing the residue of the deposit with 2-3 cracks or using an air gun.

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