JPS61268798A - Washing agent for cabrator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a carburetor cleaning agent for cleaning the inside of a carburetor attached to an engine.

(Prior art) Generally, when dirt such as carbon or oil adheres to the inside of a carburetor, or when dust such as dirt or flakes enters the inside of a carburetor,
In order to ensure that the nozzle of the carburetor's fuel jet injector and SuRosito J Pulp operate reliably, it is necessary to clean the inside of the carburetor regularly.

Therefore, a known method for cleaning the inside of a carburetor is to remove the carburetor from the engine, disassemble it, and clean it. Although this cleaning method can thoroughly clean the carburetor, it requires skilled techniques to disassemble, clean, and assemble the carburetor, and it is time-consuming because the carburetor must be removed from the engine when cleaning. It used to be a hassle.

Another cleaning method is to inject a cleaning agent into the carburetor. That is, in this method, after first removing the air cleaner, cleaning is performed by injecting a cleaning agent from the air inlet of the carburetor while the engine is rotating.

Conventionally, there are the following cleaning agents used in such a carburetor cleaning method.

(al) A cleaning agent containing oleic acid as the main ingredient and a large amount of ammonia, water, and alcohol.

(b) A cleaning agent whose main component is an aromatic solvent such as toluene or xylene.

(cl　Cleaning agent whose main ingredient is methylene chloride.

(Problems to be Solved by the Invention) However, these carburetor cleaning agents have the following problems.

In other words, carburetor cleaning agent (AT) contains oleic acid and ammonia as the main ingredients, but these oleic acid and ammonia cause a green color on the surface of brass jet injection device nozzles and throttle valves. However, if this rust blocks the injection hole at the tip of the nozzle, it can easily cause engine trouble.

Further, since the carburetor cleaning agent (b) mainly contains an aromatic solvent such as toluene and xylene, it has a drawback that it has a weak cleaning power against oil stains inside the carburetor. Furthermore, this cleaning agent (BL) has a large calorific value upon combustion, and when this cleaning agent (b) is burned together with gasoline inside the engine, a large amount of unburned matter remains, and this unburned matter is particularly important in the exhaust gas. When passing through a catalytic oxidizer that oxidizes and purifies the hydrocarbon compounds contained therein, the unburned substances are oxidized by the catalyst and emit a high temperature of 1,400 to 1,500°C.

Since the catalyst begins to deteriorate at 700° C. and has an upper limit of 900° C., the use of this cleaning agent (BL) poses problems such as deterioration of catalyst performance due to sintering and the like.

Furthermore, carburetor cleaning agent (CL) has methylene chloride as its main component, but when this cleaning agent (CL) is burned with gasoline inside the engine, the chlorine in the methylene chloride turns into hydrochloric acid, and this hydrochloric acid is inside the carrots. There were problems such as severe corrosion and accumulation of the exhaust system, including the exhaust system.

(Means for Solving the Problems) The carburetor cleaning agent of the present invention is a mixture consisting of a ketone solvent, an alcohol solvent, and a hydrocarbon solvent.

Here, the ketone solvent has the function of lifting oil stains adhering to the inside of the carburetor, and the ketone solvents include acetone, methyl ethyl ketone,
Ketone compounds having 3 to 6 carbon atoms such as diethyl ketone and methyl isobutyl ketone are selected. Preferably, when a ketone solvent having 5 or 4 carbon atoms is blended in a weight ratio of 50 or more in the total ketone solvent, in this case, the calorific value is lower than that of a ketone solvent having 6 carbon atoms. The temperature of the oxidation catalyst can be lowered as the This strong ketone solvent is contained in the carburetor cleaning agent in an amount of 10 to 50% by weight.

In the above carburetor cleaning agent, the ketone solvent having 3 to 6 carbon atoms is used because if the number of carbon atoms is less than 3, it becomes an aldehyde with reducing properties, and 7 carbon atoms are used as the ketone solvent.
This is because if it is more than +fi, the amount of heat generated by combustion becomes large and the temperature of the catalyst tends to rise. Also, if the ketone solvent is less than 10% by weight, the cleaning power for oil stains inside the carburetor will be weak, and if it exceeds 50%, the rubber or plastic parts used inside the carburetor will deteriorate. It becomes easier.

Alcohol-based solvents swell the dirt, especially hydrophilic dirt, that has accumulated inside the carburetor and reduce the amount of heat generated during combustion. Examples of such alcohol-based solvents include methyl alcohol, ethyl alcohol, and isobutyl alcohol. Alcohol compounds having 1 to 5 carbon atoms such as , isobutyl alcohol, and pentyl alcohol are selected.

Preferably, when an Ar/I/':1-al solvent having 1 to 3 carbon atoms is blended in a weight ratio of 50% or more in the total alcoholic solvent, in this case, the carbon atoms are .1 to 51. The calorific value in °C can be lowered compared to solid alcohol-based solvents. Such an alcohol solvent is contained in the carburetor cleaning agent in an amount of 20 to 40% by weight.

In the above carburetor cleaning agent, carbon atoms are 1 to 51.
161 was used as an alcohol-based solvent because carbon atoms are 61
This is because alcohol with a molecular weight of 161 or higher has a high boiling point and slow drying, resulting in oil stains after cleaning. In addition, the reason why we decided to contain alcoholic solvents with 1 to 5 carbon atoms at 20 to 40% by weight is that the content is 20 to 40% by weight.
If it is less than 0 cm, it will not be able to swell hydrophilic stains such as lumps and dirt, and if it exceeds 40 cm, the detergency of the ketone solvent against oil stains will decrease and the amount of heat generated by combustion will increase. be.

The hydrocarbon solvent works to prevent oil stains from re-agglomerating or re-adhering to the inner wall of the carburetor when the above-mentioned ketone solvent lifts the oil stains inside the carburetor. As the hydrocarbon solvent, hydrogen ash compounds containing aromatic hydrocarbons such as hexa/, toluene, and xylene, and paraffinic hydrocarbons such as octane and isooctane having 6 to 85 11A carbon atoms are selected. Such a hydrocarbon solvent is contained in the carburetor cleaning agent in an amount of 20 to 40% by weight.

In the above carburetor cleaning agent, carbon atoms are 6 to a
1 lll of hydrocarbon solvent was used because carbon atoms are 6@
If the hydrocarbon content is less than 9fd, there will be no effect of preventing oil stains floated by the ketone solvent from re-agglomerating and redepositing, and if the carbon atom content is 9fd or more, the amount of heat generated by combustion will increase and the catalyst will This is because it becomes easier to raise the temperature. In addition, the reason why it was decided to contain 20-40% by weight of a hydrocarbon solvent having 6 to 81 carbon atoms is because if the content is less than 20%, the oil floated by the ketone solvent This is because the effect of preventing dirt from re-agglomerating and re-adhering is lost, and if it exceeds 40 inches, the detergency of the ketone solvent against oil stains decreases.

By the way, in the carburetor cleaning agent of the present invention, the weight ratio of the ketone solvent with 5 or 6-0 carbon atoms is lθ to 30q6 in the total ketone solvent, and the alcohol solvent with 4 or 5 carbon atoms is the total alcohol. 1 by weight in the solvent
When 0 to 30 parts are mixed, the cleaning power for the inside of the carburetor can be kept constant at both low and high temperatures, and the drying rate can be kept constant.

Next, a method of using the carburetor cleaning agent configured as described above will be explained. When this carburetor cleaning agent is injected into the interior of the carburetor, it is better to use it in a mist form to capture dirt from every corner of the interior of the carburetor, thereby increasing the cleaning effect. Therefore, this carburetor cleaning agent is used by putting it in an aerosol container or a spray container. For example, put the cleaning agent in an aerosol container, LP(),
It can also be made into an aerosol type by filling it with atomizing gas such as chlorofluorocarbon gas or butane gas.

Next, with the engine running, a cleaning agent is sprayed using the above aerosol or the like from the throttle valve of the carburetor with the air filter removed. Inside the carburetor, oil stains and dust are removed and cleaned using a cleaning agent. The cleaning agent is burned inside the engine.

In addition, in engines in which a catalytic oxidation device is attached to the exhaust port, another cleaning method using the above-mentioned cleaning agent is used. In other words, in this cleaning method, the cleaning agent is misted while the engine is stopped, and then the engine is started and the cleaning agent is burned to a temperature below ℃, thereby preventing deterioration in catalyst performance. You can obtain effects such as not causing any damage.

(Experimental Example) Next, an experimental example will be shown to clarify the effects of this carburetor cleaning agent.

(Experiment Example 1) Comparison of the cleaning effect on the carburetor of a two-wheeled vehicle that has been used for one year and the effect on metals (brass, aluminum alloy) and rubber after one day using a cleaning agent prepared with the following compounding ratio. We conducted a test.

Comparative example (at Oleic acid... 100 parts Water... 200 parts Ammonia water... 100% Isopropyl alcohol... 100 parts Toluene
... 500 parts Isooctane ... 200 parts Comparative example (1+) Toluene ... 100 parts A test was conducted to measure the outlet temperature.The results of this measurement test are shown in Table 2.

Table 2 As is clear from Table 2, cleaning agent (1) was used in comparative example (
Compared to a), +1)), and (0), it can be seen that the temperature of catalyst 1- can be kept low within the upper limit of its allowable temperature (700 to 900°C), which is ambiguous.

(Experimental Example 3) A comparative test similar to Experimental Example 1 was conducted using cleaning agents (2) to (5) in which the ingredients and their mixing ratios were carefully set to satisfy the conditions of the present invention.

Note that the test method and evaluation method for the results are also the same as in Experimental Example 1. The results of this comparative test are shown in Table 3.

As is clear from Table 3 and Table 6, cleaning agents (2) to (5) are:
It can be seen that it has a cleaning effect on dirt inside the carburetor and does not affect metal or rubber. In addition, cleaning agents (4) and (51) in which the weight ratio of the ketone solvent is in the range of 40 to 50
It can be seen that the cleaning effect is superior to that of cleaning agents (21, (3)K) in the range of 0 to 20qb.

(Experimental Example 4) An experiment similar to Experimental Example 2 was conducted using cleaning agents (6) to (9) with various blending components and their blending ratios that satisfied the conditions of the present invention. The outlet temperature was measured. The results of this experiment are shown in Figure 4.

Table 4 As is clear from Table 4, methyl ethyl ketone with 4 threshold R atoms occupies 75% of the total number of threads #MJ.
It can be seen that in detergent (6), methyl isobutyl lactone, which has 6 carbon atoms, has the effect of lowering the outlet temperature of the tentacle layer by 20°C compared to detergent (8), which accounts for 75% of all ketone solvents. . In addition, the cleaning agent (6) in which the entire alcoholic solvent is occupied by 1 or 2 carbon atoms is 511 carbon atoms! It can be seen that this cleaning agent has the effect of lowering the outlet temperature of the catalyst layer by 60° C. compared to cleaning agent (7) which is dominated by alcohol. Furthermore,
It can be seen that cleaning agent (9) has a lower total calorific value of all alcoholic solvents than cleaning agent (7), and therefore has the effect of lowering the outlet temperature of the catalyst layer by 30°C.

(Effects of the Invention) As explained above, the carburetor cleaning agent of the present invention contains a ketone solvent having 3 to 6+IA carbon atoms in a weight ratio of 1 to 1.
0 to 50%, 20 to 40% by weight of an alcoholic solvent having 1 to 5 carbon atoms, and 20 to 40% by weight of a hydrocarbon solvent having 6 to 81 carbon atoms. You can get excellent effects such as:

(1) According to the present invention, the metal parts inside the carburetor, especially the nozzle and throttle valve of the jet injection device made of brass, do not rust, so the injection hole at the tip of the nozzle is The carburetor can always be kept in normal condition without being blocked.

(11) Since the present invention contains a ketone solvent having 3 to 6 carbon atoms in a weight ratio of 10 to 50, it is possible to obtain a deep cleaning effect on oil stains inside the container. Furthermore, if a ketone solvent having 3 or 4115 carbon atoms is blended in a weight ratio of 50 or more to the total ketone solvent, the calorific value will be approximately Since it is easy to use, it is possible to lower the catalyst temperature of the catalytic oxidizer installed at the engine exhaust port and prevent deterioration of catalyst performance such as sintering.

Since the present invention contains 20 to 40% by weight of an alcoholic solvent having 1 to 51 carbon atoms, it swells hydrophilic stains such as scales and dirt, and also lifts them up for easy removal. You can obtain the effect of In addition, when an alcoholic solvent with 1 to 3 carbon atoms (F1a) is blended in a weight ratio of 50 or more to the total alcoholic solvent, in this case, compared to an alcoholic solvent with 1 to 5 carbon atoms,
Since the calorific value decreases, the catalyst temperature can be lowered and catalyst performance deterioration can be prevented.

Claims (1)

[Claims] A ketone solvent with 3 to 6 carbon atoms in a weight ratio of 10 to 5
0%, 20 to 40% by weight of an alcoholic solvent having 1 to 5 carbon atoms, and 20 to 40% by weight of a hydrocarbon solvent having 6 to 8 carbon atoms. Carburetor cleaning agent.