JPH06313198A - Agent for cleaning air intake system of engine and method therefor - Google Patents

Abstract

PURPOSE:To obtain the subject agent and to provide a method therefor which not only enable satisfactory cleaning of the air intake system of an engine without the necessity or disassembling the system but also emit neither black smoke nor undesirable odor. CONSTITUTION:This agent comprises a fatty acid, an alcohol solvent, a glycol ether and/or its acetate, a surfactant, ammonia water and/or an amine, water and a petroleum solvent. The air intake system A of an engine 4 is cleaned by introducing the agent from a throttle valve 2 or an air regulator 3 into the system A to float up dirt in it and starting the engine 4 to introduce the dirt together with the agent into a combustion chamber 5 to thereby burn them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning agent and a cleaning method which can not only satisfactorily clean the intake system of an engine of an automobile or the like without disassembling but also generate no black smoke or odor.

[0002]

2. Description of the Related Art Conventionally, when cleaning the intake system of an engine, a method of disassembling and cleaning the intake system, a mixed solvent containing an aromatic organic solvent as a main component as a cleaning agent, and using this method as an aerosol, etc. A cleaning method that directly sprays into the intake system, a cleaning method that sprays a cleaning agent containing an organic solvent or fatty acid as the main component directly into the intake system by a method such as an aerosol, and a metal ion such as a surfactant in the above cleaning agent. There are used various cleaning agents such as a cleaning method in which a cleaning agent containing is directly sprayed into an intake system by a method such as an aerosol, and a cleaning method.

[0003]

However, these known techniques have the following drawbacks. That is, 1. In the cleaning method of (1), the intake system must be removed during cleaning, and skilled work is required for each work of disassembly and assembly, which is troublesome and troublesome. 2. In the method of and, since a large amount of organic solvent is contained in the component, when spraying directly into the intake system,
It produces a large amount of black smoke and odor in the exhaust gas.

Conventionally, automobile maintenance factories which mainly use these cleaning agents have been set up in a place which is not adjacent to an industrial park or a suburban house, and therefore a large amount of the substances discharged during cleaning are discharged. Black smoke and stench were not too much of a problem.
However, due to housing conditions in recent years, houses have come to stand in places where houses have not been built up to now, and automobile maintenance plants and houses have become adjacent to each other. For this reason, a large amount of black smoke and bad odors emitted during this work have become a problem for maintenance shops that want to coexist with adjacent houses.

Therefore, the object of the present invention is to clean the intake system of an engine of an automobile or the like as it is without disassembling it, and therefore, there is no trouble in cleaning and no black smoke or odor is generated. SUMMARY OF THE INVENTION It is an object of the present invention to provide a cleaning agent and a cleaning method for an intake system of an engine, in which the above-mentioned drawbacks of the known art are improved.

[0006]

In order to achieve the above-mentioned object, according to the detergent of the present invention, fatty acid, alcohol solvent, glycol ether and / or acetate solvent, surfactant, ammonia water and / or Alternatively, it is characterized by containing an amine, water, and a petroleum solvent.

Further, in order to achieve the above object, according to the cleaning method of the present invention, fatty acid, alcohol solvent, glycol ether and / or acetate solvent, surfactant, ammonia water and / or amine, water, And a cleaning agent containing a petroleum solvent is introduced into the intake system of the engine to raise the dirt in the intake system with the cleaning agent, and then the engine is started to introduce the dirt into the combustion chamber together with the cleaning agent. , Burning.

[0008]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be specifically described below. The above-mentioned fatty acid, which is one component of the detergent of the present invention, saponifies with ammonia water and / or amine in the detergent to act as a dispersant and a detergent, and particularly contains 20% or more of oleic acid. As a result, sufficient detergency can be obtained. Such a fatty acid is contained in the detergent of the present invention in an amount of 2 to 15% by weight. This is 2
If it is less than 15%, sufficient cleaning power cannot be obtained, and if it exceeds 15%, a peculiar malodor is generated in the exhaust gas during cleaning, which is not preferable.

Further, the alcoholic solvent acts as a compatibilizing agent and adjusts the viscosity and foaming property of the detergent. Such alcohol solvents include methanol, ethanol, propyl alcohol, isopropyl alcohol, butanol, isobutanol, 2-butanol, 3
-Butanol, amyl alcohol, heptanol, octanol and the like having 1 to 8 carbon atoms. 8 carbon atoms
When it exceeds, the hydrophilicity becomes small and the compound does not work as a compatibilizer. Such an alcohol solvent is contained in the detergent of the present invention in a weight ratio of 2 to 50%. This is 2%
If it is less than the above, a sufficient effect cannot be obtained as a compatibilizer,
If it exceeds 50%, the detergency of other components will be impaired.

Further, the glycol ether or its acetate type solvent dissolves dirt and also acts as a penetrating agent, and a synergistic effect of the fatty acid and saponified ammonia gives a sufficient cleaning effect. . Such glycol ether or acetate solvent thereof, ethylene glycol methyl ether, ethylene glycol ethyl ether, ethylene glycol ethyl ether acetate, ethylene glycol butyl ether, ethylene glycol isobutyl ether, diethylene glycol ethyl ether, diethylene glycol butyl ether, propylene glycol methyl ether, Propylene glycol ethyl ether, etc.
It is a glycol ether having 3 to 8 carbon atoms or an acetate solvent thereof. A glycol ether having a carbon number of more than 8 or an acetate solvent thereof has insufficient dissolving power and penetrating power, so that sufficient detergency cannot be obtained. The glycol ether and its acetate solvent are contained in the detergent of the present invention in an amount of 10 to 50% by weight. If it is less than 10%, sufficient dissolving power and cleaning effect cannot be obtained, and if it exceeds 50%, sufficient cleaning effect due to synergistic effect of fatty acid and saponified ammonia cannot be obtained. In the present invention, such a glycol ether or its acetate may be used together.
Each can be used alone.

Further, the above-mentioned surfactant functions as a compatibilizing agent and a foaming regulator. This type of surfactant may adversely affect the exhaust gas and the three-way catalyst, so it is preferable to use one that does not contain metal ions, sulfur, phosphorus, etc., such as polyoxyethylene alkyl phenyl ether. -Polyoxyethylene alkyl ether, amide type nonionic surfactant, polyglycerin fatty acid ester, etc. are mentioned. The amount of such a surfactant is 1 to 10% by weight in the detergent of the present invention. If it is less than 1%, the above effect is not obtained, and if it exceeds 10%, a peculiar malodor is generated in the exhaust gas during cleaning.

Furthermore, the above-mentioned aqueous ammonia or amine saponifies with the above-mentioned fatty acid in the detergent to act as a detergent and a dispersant. Such ammonia water or amine has a chemical equivalent of 1 of fatty acid.
It is contained so as to be 5 times equivalent. If it is less than 1 time equivalent, all the fatty acids cannot be saponified, and sufficient cleaning effect cannot be obtained. If it exceeds 5 times equivalent, the smell becomes strong and the brass used in the fuel injection part of automobiles is used. Corrosion of parts. As the above-mentioned amine, one or more selected from the group of alkylamine having 1 to 10 carbon atoms, alkanolamine having 2 to 10 carbon atoms, and morpholine is used. In the present invention, these ammonia waters or amines may be used together or may be used alone.

Further, the above-mentioned water is effective in significantly reducing the black smoke and malodor contained in the exhaust gas during cleaning. Due to this effect, even if fatty acid is contained in the cleaning agent up to 15%, cleaning can be performed. It is possible to suppress the black smoke and bad odor contained in the exhaust gas inside, and it is expected that the cleaning power of the cleaning agent will be greatly improved due to the effect of the fatty acids described above. This water content is 20 to 60% by weight in the detergent. If this is less than 20%, the black smoke and malodor contained in the exhaust gas during cleaning cannot be reduced sufficiently,
If it exceeds 60%, sufficient detergency cannot be obtained. Further, this water content also includes the water content contained in the above-mentioned ammonia water.

Further, the above-mentioned petroleum-based solvent acts to further enhance the cleaning effect by the synergistic effect of the glycol ether and its acetate-based solvent and a saponified product of fatty acid and ammonia, and particularly aromatic hydrocarbons. A petroleum solvent containing 20% or more by weight has a great effect. Examples of such petroleum-based solvents include hydrocarbons having 7 to 12 carbon atoms. Petroleum-based solvents with hydrocarbons having less than 7 carbon atoms are too fast to dry and are not suitable for this application.
Hydrocarbons with more than 12 carbons dry too slowly and are not suitable for this application. Such a petroleum solvent is contained in the detergent in an amount of 3 to 40% by weight. If this is less than 3%,
Sufficient detergency cannot be obtained, and if it exceeds 40%, a peculiar odor is generated in the exhaust gas during cleaning.

The cleaning agent containing the above-mentioned components is introduced into the intake system of the engine, the dirt in the intake system is lifted by the cleaning agent, and then the engine is started to clean the entire cleaning agent. Is introduced into the combustion chamber and burned.

The above-mentioned cleaning agent is also introduced into the intake system of the engine in a state where the engine has been started, and then the engine is once stopped and left to stand so that dirt in the intake system is lifted by the cleaning agent. , Restart the engine and introduce dirt with the cleaning agent into the combustion chamber and burn it.

The cleaning agent is introduced into the intake system of the engine in the form of mist or foam. As a concrete means for this, an aerosol, a spray, an airless gun, etc. can be considered. When aerosol is used, LP is used as the propellant.
G and DME are preferable, and the pressure may be adjusted with carbon dioxide gas or the like. Further, the cleaning agent in the present invention is for directly spraying the intake system from a carburetor, a throttle valve, etc. to clean the intake system. Is not added.

FIG. 1 is an explanatory view showing an intake system of an automobile engine according to the present invention, in which air is introduced into the intake system through an air cleaner 1, and this air is, as indicated by an arrow, a throttle valve 2 and an air regulator. Three
Is introduced into the engine 4 and reaches the combustion chamber 5.

In the intake system A thus constructed, the above-mentioned cleaning agent is introduced into the intake system A from the throttle valve 2 or the carburetor 3 in the present invention.

The engine applied to the present invention is an engine of an electronically controlled fuel injection device specification, an engine of a carburetor specification, or the like.

[0021]

EXAMPLES Each sample having the composition shown in Table 1 (Examples 1 to 6)
And Comparative Examples 1-5) were prepared.

[0022]

[Table 1]

Each sample in Table 1 was subjected to a metal resistance test, a rubber resistance test, a detergency test, an exhaust gas black smoke concentration test during cleaning and an offensive odor test in the exhaust gas, and the results are shown in Table 2.

[0024]

[Table 2]

Various test methods are as follows. Metallic and rubber resistance The test piece was dipped in a cleaning agent, left standing for 1 day, and visually evaluated. ◎… No change ○… Slight change △… Change ×… Significant change

Detergency 1 2 cm x the intake manifold of an abandoned car
The test piece was cut into 5 cm pieces. Further, as the cleaning agent, LPG was used as a propellant, or when the compatibility with the cleaning agent was poor, DME was used alone or as a propellant by mixing with LPG to fill the aerosol. Using these, the following tests were conducted. The test piece is weighed with an accuracy of 0.1 mg and designated as W1. The test piece is sprayed with an aerosol for 10 seconds. After 5 minutes, the aerosol is directly spray-washed on the soiled portion for 3 minutes. Take out the test piece and quickly wash away the cleaner liquid adhering to the test piece with isopropyl alcohol. After the test piece is dried, the weight of the test piece is measured and designated as W2. The stain on the test piece is completely removed, and its weight is W3. Calculation of dirt removal rate

Based on the following formula, the stain removal rate (C%)
And as a guideline for cleanability.

[Equation 1]

Judgment ◎ ... 75 <C ○ ... 50 <C ≦ 75 Δ ... 25 <C ≦ 50 × ... C ≦ 25

Detergency test 2 Carburettor specification vehicles with mileage of 15,000 to 25,000 km
11 units were prepared, and a test was performed for each cleaning agent. In the test, cleaning is performed according to the following cleaning method, and the carburetor after cleaning is visually determined. Cleaning agent is LPG
D as a propellant or when the compatibility with the cleaning agent is poor, D
ME was used alone or as a propellant mixed with LPG to fill the aerosol.

Cleaning Method Start the engine and warm it up for 5 to 10 minutes. Stop the engine and remove the air cleaner cover element. Blow the aerosolized detergent into the vaporizer inlet for a few seconds. After 2 minutes, do cranking. Blow into the vaporizer inlet for a few seconds and leave for 5 minutes. Start the engine, make it a high idle, and blow in all. Evacuate intermittently until smoke does not come out of the muffler.

Concentration of black smoke during washing Nissan 180SX H.S. A 2-year model 38,000km traveling vehicle was used as a test vehicle, and the cleaning liquid used LPG as a propellant, or when the compatibility with the cleaning agent was poor, DME was used as a propellant alone or in a mixture with LPG, and the aerosol was filled. With these,
The cleaning agent was cleaned by the following cleaning method, the exhaust gas during the cleaning was measured with a smoke meter, and the value was determined.

Judgment A: 20 or less O: 21-30 Δ: 31-40 × ... 41 or more Odor during washing Nissan 180SX H. A 2-year model 38,000km traveling vehicle was used as a test vehicle, and the cleaning liquid used LPG as a propellant, or when the compatibility with the cleaning agent was poor, DME was used as a propellant alone or in a mixture with LPG, and the aerosol was filled. With these,
The cleaning agent was cleaned by the following cleaning method, and the odor of exhaust gas during the cleaning was measured by a sensory test.

Judgment ◎ ... Smell of general exhaust gas ○ ... Smell of general exhaust gas accompanied by some bad odor △ ...

Cleaning Method Start the engine. Stop the engine and remove the vacuum hose near the throttle body. Set the nozzle so that outside air does not enter the place where the hose is removed. Start the engine and inject 180 ml while keeping the rotation speed at 2000 rpm. Stop the engine and let it sit for 5-10 minutes. Remove the set nozzle and replace the hose. Start the engine. Evacuate intermittently until smoke does not come out of the muffler.

[0036]

The present invention described above can be washed as it is without disassembling the intake system of the engine of an automobile, etc., by washing in a specific method using the detergent of the above composition,
Therefore, it is not troublesome, and the effect on the metal and the rubber is small, a sufficient cleaning effect is obtained, and further, the black smoke and the bad smell of the exhaust gas during the cleaning can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an intake system of an engine according to the present invention.

[Explanation of symbols]

 1 Air Cleaner 2 Throttle Valve 3 Air Regulator 4 Engine 5 Combustion Chamber A Intake System

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area C11D 3:30)

Claims (12)

[Claims] 1. An engine intake system cleaning agent containing a fatty acid, an alcohol solvent, a glycol ether and / or an acetate solvent thereof, a surfactant, ammonia water and / or amine, water, and a petroleum solvent. . 2. A fatty acid of 2 to 15% by weight, an alcohol solvent of 2 to 50% by weight, a glycol ether and / or acetate solvent of 10 to 50% by weight, and a surfactant of 1 to 10%.
% By weight, aqueous ammonia and / or amine is 1 to 1 of fatty acid as a chemical equivalent of ammonia and / or amine.
5 times equivalent, water 20-60% by weight, and petroleum solvent 3-
The cleaning agent according to claim 1, which contains 40% by weight of each. 3. The cleaning agent according to claim 1, wherein the fatty acid contains 20% by weight or more of oleic acid. 4. The cleaning agent according to claim 1, wherein the alcoholic solvent has 1 to 8 carbon atoms. 5. The cleaning agent according to claim 1, wherein the glycol ether and / or its acetate solvent has 3 to 8 carbon atoms. 6. The detergent according to claim 1, wherein the amine is one or more selected from the group consisting of alkylamine having 1 to 10 carbon atoms, alkanolamine having 2 to 10 carbon atoms, and morpholine. 7. The cleaning agent according to claim 1, wherein the petroleum solvent is a hydrocarbon having 7 to 12 carbon atoms and contains 20% by weight or more of an aromatic hydrocarbon. 8. A cleaning agent containing a fatty acid, an alcohol solvent, a glycol ether and / or an acetate solvent, a surfactant, ammonia water and / or an amine, water, and a petroleum solvent for an intake system of an engine. A method for cleaning an intake system of an engine, characterized by introducing dirt to raise dirt in the intake system with the cleaning agent, and then starting the engine to introduce the dirt together with the cleaning agent into a combustion chamber to burn the dirt. 9. The cleaning agent according to claim 8 is introduced into an intake system of an engine in a state where the engine is started, and then the engine is once stopped and left to stand so that dirt in the intake system is lifted by the cleaning agent. 9. The cleaning method according to claim 8, further comprising: starting the engine, introducing the dirt together with the cleaning agent into the combustion chamber, and burning the dirt. 10. The cleaning method according to claim 8, wherein the cleaning agent is introduced into the intake system of the engine in the form of mist or foam. 11. The cleaning method according to claim 8, wherein the cleaning agent is introduced into the intake system through a throttle valve. 12. The cleaning method according to claim 8, wherein the cleaning agent is introduced into the intake system from a gablator.