DE1915767C3 - Toluene-containing, oily cleaning agent for restoring the original compression and performance of an internal combustion engine - Google Patents

Description

The invention relates to an oily cleaning agent containing toluene for restoring the original compression and power of an internal combustion engine, for example an Otto or Diesel engine, after a long running time, as well as the treatment process and the use of the mixture.

It has been shown that internal combustion engines, after a long running time, also in kilometers run, for example 100,000 km, expressed who can, a reduced compression as well as an i show increased fuel and lubricating oil consumption and fuels have a higher knock resistance request, d. h., the performance of the internal combustion engine! got worse.

in general, the performance depends on internal combustion machines from the exhaust system, the lubricating oil and cooler circuit as well as their temperatures

ίο the type of lubricating oil used and to it Otto engines from the regulation of the input and distribution circuits, d. H. the gassing, the electric Plant and the quality of the fuel, especially with regard to its anti-knock properties, while at Diesel engines control the injection and pre-injection as well as the gas oil used as Influencing variables come into question. The state of the atmosphere is superimposed on these parameters, d. H. Pressure. Temperature and humidity. If these parameters, after their appropriate interaction the optimal performance is set, equally effective and kept constant, so there is a drop in performance over the term due to mechanical wear and tear, due to deposits in the combustion chamber, especially in gasoline engines, and by deposits on and on the piston rings, which is particularly important in diesel engines comes.

The running time-dependent, mechanical wear is due to the driving style, the setting of the control systems, the type of lubricating oil and fuel used and the working of the lubricating and cooling circuit. The wear is particularly noticeable on the valve seats, the cylinder liner and the piston rings. The fuel consumption increases. the compression deteriorates and the mean indicated pressure decreases, so that a drop in power and torque occurs.
When an engine is running for a longer period of time, carbon residues left behind by combustion usually settle on the inside walls of the cylinder head and the piston crown and, by binding oxygen and hydrogen, form a thin layer on the surface of the metal parts. However, this layer, which is harmless in itself, binds lead oxide crystals, the formation of which is possible due to the anti-knock additives in the fuel, the lubricating oil and fuel used and the arrangement of the cooling surfaces. Since the formation of lead oxide crystals is promoted by lower temperatures, their formation occurs preferentially in gasoline engines, where the fuel can also contain traces of lead and other metals. This second, predominantly metallic layer has a very high thermal capacity and good thermal conductivity, while the first layer of carbon residues holding the second layer, which rests on the metal walls, has a strong insulating effect on heat dissipation to the outside due to its carbon content. This has the result that the metallic second layer heats up and creates points of local overheating, which promotes pre-ignition and self-ignition as well as irregular combustion of the mixture. The interrupted heat dissipation and the resulting increased internal cylinder temperature results in an increase in the compression ratio, which in turn contributes fuel to avoid the "clinking" sound

requires increased knock resistance. In addition, disturbances of a mechanical nature can occur, such as For example, the piston crowns burn through or burn in and the exhaust valve no longer closes by increasing incrustation of the seat.

In the case of diesel engines, there is usually no such risk because the first layer of binder is formed duich the higher temperature and the higher pressure is prevented and also little in the gas oil Metal impurities are included.

The piston rings of an internal combustion engine have to move to the liner during reciprocation In general, a game that occurs at the reversal points due to the forces of inertia each time to a sealing tight fit of the rings on the liner leads. This also creates a certain Self-cleaning caused by deposits, which, however, is not always sufficient that itself Due to the imperfect combustion of the lubricant on the piston rings ι a binder layer is formed by the fact that the free valences of the broken oil molecules are oxygen atoms and bind other elements present. The formation of such a layer is particularly Favored by high operating temperatures, because this makes it easier for the oil molecules to crack can take place. This clogging or sticking or gumming of the piston rings is reduced their freedom of movement, so that the compression becomes worse and due to the increasing Friction decreases the performance. This process, which is particularly important in diesel engines because of the high Temperature does not change due to changes in operation and load. Despite use certain liters of oils with cleaning and dispersing agents Clogging of the piston rings cannot be avoided.

The performance losses caused by the phenomena mentioned above are present so far compensated by either replacing the entire engine or new piston rings started, the cylinder was ground and the rest of the combustion chamber cleaned. This commonly used overhaul on internal combustion engines with a long service life is due to the Time and the required spare parts as well as the necessary tools and devices very expensive.

Attempts have therefore been made to compensate for the drop in performance over the running time through or to counter additives mixed with gasoline as well as strong cleaning oils. So these substances have to be present continuously during operation, which also entails high costs in the long term and only a small and partial cleaning of the combustion chamber. Valves and piston rings leads, so that a substantial increase in compression cannot be determined.

Since about 1930, various proposals have been made to use liquid mixtures that contain single introduction into the combustion chamber of an internal combustion engine, the disadvantages mentioned above remove. For example, in the German Palentschrift 420 604 suggested the use of a mixture of an amine with a varnish solvent: in the German Tatentschrift 525 601 the use proposed of halogenated aromatic hydrocarbons, the optional one Solvents can be added; in German patent 575 147 the use a mixture of toluene, xylene or ethylbenzene and a compound of the furan group proposed and by the United States patent 2 004 628 the use of a mixture of kerosene, kieosot, Castor oil and amyl acetate.

Furthermore, in US Pat. No. 2,904,458 for cleaning the interior of internal combustion engines, the use of a mixture of about 20 to 50 percent by volume of a hydrocarbon such as xylene, toluene, benzene, ethylbenzene or trimethylbenzene, 20 to 40 percent by volume of a glycol monoalkyl ether, 15 to 35 percent by volume of a chlorinated benzene and 10 to 25 percent by volume of an alkyl monoamine; U.S. Patent 3,005,778 discloses the use of approximately 50 parts by volume of a purified paraffinic mineral oil. of 50 parts one. Solvent for tar-like and gummy substances from the xylene group. Toluene and naphtha, of 2 to 4 parts of benzaldehyde and V ₄ to ^l / ₂ Phenyla.'etaldehyd part. on. These liquid mixtures were no longer used after an initial period of practical use, which was, however, very limited, because once their effectiveness was rather doubtful, i.e. the results obtained were only partially satisfactory, and as the machines and fuels used today have changed completely. The object of the present invention is therefore to provide an oily cleaning agent containing toluene with which the combustion chamber of an internal combustion engine is treated once in a suitable manner so that the engine can retain its original properties, such as performance. Compression. Fuel and oil consumption are restored and normal, commercially available fuel with the appropriate knock resistance can be used.

The inventive. Oily detergents containing toluene to restore the original The compression and performance of an internal combustion engine is characterized by the fact that it is au < 5 to 45% pure toluene. 5 to 45% turpentine oil 5 to 45% castor oil. 5 to 45% tetralin, 5 to 45 ° /, Fenchone and 5 to 45% amyl acetate.

The oily liquid mixtures A. B and C. listed below are preferred.

mixture

- -

Pure To'uol ...

Turpentine oil

Castor oil

Tetralin

Fenchon

Amylacehu

A. b ■% % 25th 30th 15th 20th 12.5 15th Ii 10 25th 20th 11.5 5

Good results are also achieved with the nact The oily liquid mixtures 1 to I listed above achieve:

mixture D. E. F. G Pure toluene ...
Turpentine oil
Castor oil
Tetralin IO
10
30th
IO
5
35 45
5
20th
5
5
20th 15th
15th
10
IO
45
5 IO
45
15th
IU
10
IO Fenchon
Amyl acetate

15th
10
45
IO
5
15th

The fenchon can be in L-. D- or inactive form, the mixture can be aniline or a dye can be added in an amount of approximately 0.5 g / l liquid mixture.

The mixture formed by the individual components is advantageously 5 to 10 minutes stirred under normal conditions.

This mixture according to the invention is used in such a way that the mixture is introduced into the combustion chamber of the cylinder through a suitable opening with the engine stopped, the cooling liquid already having a temperature of at least 90 ^° C. and / or the lubricant having ^{a temperature of at least 80 ° C.} that the mixture remains in the combustion chamber for about 30 minutes with the filler opening closed and is then eiiifcini by starting and running the engine together with the detached substances through the exhaust line. As a suitable opening, uci Otto engines expediently use the threaded hole for the candle, while the injection nozzle can be unscrewed in diesel engines. In internal combustion engines with air cooling, the lubricant temperature is used as a guideline for heating up the engine.

The treatment of the individual cylinders is expediently carried out in such a way that partial cooling of the engine is avoided. In the case of internal combustion engines operating according to the two-stroke process, the Combustion chamber are limited by the piston located in the top dead center, while at internal combustion engines working according to the four-stroke process, the combustion chamber through the piston is limited in a position between the compression and expansion stroke is in a tight combustion chamber. In the case of a diesel engine with an antechamber the top dead center is set via the pre-injection. When performing this treatment the temperature of the surrounding atmosphere should be above 18 ° C.

The oily liquid mixture according to the invention should be stored in glass or metal containers at room temperature and stored in a dry place away from heat sources.

A simple comparison in terms of performance results from the fact that before and immediately after the compression is measured during treatment, taking into account. that compression only reached its best value after a running time of more than 6 hours after the treatment. That in the The mixture introduced into a warm cylinder dissolves the carbon compounds on the metal walls adhering binders and removes it through the outlet line after the treatment period. Any metal or lead salts previously held by the binder are now free and flow while the engine continues to run out of the combustion chamber. The one in the mix Dissolved substances can be identified by the change in color of the gas flow emerging from the exhaust. It is important that the treatment is carried out individually in the corresponding cylinder order the internal combustion engine can be made to run by the non-removable cylinders.

The mixture according to the invention and its corresponding Use have the advantage that a corresponding one without a large expenditure of time and tools Cleaning of the combustion chamber in the cylinder of an internal combustion engine is achieved, after which the machine in terms of performance, compression. Fuel consumption and required anti-knock properties the fuel is like new again. By simply draining the cleaning solution over the exhaust remains in the combustion chamber as residues only metal compounds, which through the Current can be torn out during the run.

The invention is further developed with the aid of the drawings and the experiments listed below illustrated.

Fig. I shows the course of the performance of a FIAT 1500 engine, depending on the speed before and after the treatment with the determination tool Mixture:

FIG. 2 shows the speed-dependent one belonging to FIG. 1 Torque curve;

F 1 g. 3 shows the Vciiuüf des DiciiiiiuiiiciiiN a * LA-400 Lombardini engine, depending on the speed before and after treatment with the mixture according to the invention:

Fi g. 4 shows the speed associated with Fig. 3 -

dependent performance curves.

Example I.

A FIAT 1500 petrol engine that has already driven 96 (XX) km in city and cross-country journeys without an overhaul in which the cylinder cover is removed so that valves. Rifles. Piston rings and pistons are in their original installed state, is examined on the test bench, whereby the temperature of the coolant is ⁰ ° C and that of the lubricating oil is 80 ° C. The test procedure is carried out as follows:

Removal of the cylinder head to measure the combustion chamber, replace the head, determine the compression, power and consumption of the cylinders.
Treatment with the above-mentioned oily liquid mixture A, consisting of 25% toluene, 15% turpentine oil, 12.5% castor oil. 11% tetralin, 2 ^% fenchone and 11.5% amyl acetate, whereby the cylinder sequence is taken into account accordingly.

Measurement of the compression of the cylinders, determination of the power and consumption during the run at 70% maximum performance after 2 and 6 hours after the treatment. Then take off Head and measurement of the combustion chamber.

The determination of the compression after the treatment reached an increase in the peak of + ZO kg cm ² , so that the compression value of

about 10 kg / cm ² before the treatment with the oily liquid mixture according to the invention is increased to 12 kg / cm ² after the treatment, which corresponds approximately to the mean value of the compression of the new engine.

The increase in power and torque dur.-ii the treatment with the mixture according to the invention and 2 and 6 hours after the treatment are shown in Table I and in FIGS. 1 and 2 as a function of the speed. Curves a, a 'show the values before the treatment with the mixture according to the invention, curves b, h' the values immediately afterwards, curves c, c ' the values after 2 hours and curves d, d' the values for 6 Hours after treatment. It is noteworthy that the increase in output from 66.5 HP at 5300 rpm before the treatment to 72.5 HP at the same speed after the treatment almost achieves the original output specified by the manufacturer FIAT. After this attempt, the engine continued to run for 20,000 km, constantly being checked.

Table 1

On the test bench on a FIAT 1500 Ottomolor experiments carried out

number of revolutions power Torque Performance
/ iinahmc Rpm PS mkg % before the treatment 5300 66 51 - 5000 66.00 - 4700 62.98 - after 8.99 5300 68.47 9.45 2.9 5000 66.86 9.60 1.3 4700 64.51 treatment 2.4 9.25 9.58 9.83

80 mm and its displacement is 402 cm ^J. The engine runs on gasoline and blown air and has high-pressure lubrication with a filter. The deposits in the combustion chamber are favored by the lower speeds, the lower operating temperature and the high lead content of the fuel. The regulations for small engines used in arable farming were followed with regard to the exact sequence of work cycles and periods in continuous operation. The running-in time of the engine with gradually increasing load lasted 16.5 hours, the total test 640 hours, of which 565 were carried out under the conditions described below, while the last 75 hours were carried out without load at low values in order to promote the deposition. During the whole time, the inspections prescribed by the manufacturer were carried out, such as checking the oil level and changing the oil.

50 hours each, cleaning of air filter and fuel liter, checking and cleaning of electrodes, Candles and the platinum contacts, control of the cooling between valves, etc.

During the period mentioned, two treatments were carried out with the oily liquid mixture described above B, consisting of 30% toluene. 20% turpentine oil, 15% castor oil, 10% tetralin. 20% fenchone and 5% amyl acetate. After before each treatment, the temperature of the lubricating oil was brought to operating temperature, the following steps were carried out:

Removal of the head, measurement of the combustion chamber, reassembly of the cylinder head. Determination of performance and consumption. Treatment with the oily according to the invention Liquid mixture.

Measurement of performance and consumption in operation. After the second treatment, the measurement is made repeated after 9 hours of operation at 70% maximum power to ensure reproducibility to review the improvement in performance. Then the cylinder head is removed and the combustion chamber measured.

45

after treatment and 2 hours of running
in the test bench

5300 70.61 9.54 6.2 5000 6938 9.94 5.1 4700 67.12 10.23 6.6

after treatment and 6 hours of running
in the test bench

5300
5000
4700.

7Z49
71.47
69.60

9.79
10.24
10.60

9.0

8.3

10.5

B e i s ρ i e! 2

For examining the deposits or encrustations in the combustion chamber of a single-cylinder gasoline engine becomes a Lombardini LA 400 four-stroke engine used. It consists of a vertical> ylinder with hanging valves, its bore After running for 176 hours it was evident after the first treatment that the combustion chamber parts, in particular with regard to deposits in the vicinity of the exhaust and intake valves completely cleaned are. The candle is completely clean. After the second treatment after 640 hours of running can also an increase in performance, a reduction in self-consumption, the complete absorption of carbon deposits and the flaking of the lead salts can be determined.

Example 3

The deposition on the piston rings is to be investigated on the same engine as used in Example 2 will. The engine runs on regular gasoline with a low lead content. For the Pure mineral oil (SAE 30) is used for lubrication. The gasoline is 4 percent pure by weight Mineral oil (SAE 50) mixed in. The engine is continuously running at maximum power by 70% of the torque corresponding to this speed in order to determine the mean temperature of the metal

209681/371

2830

salt and the combustion temperature during operation. The Lombardini LA 400 engine runs on the test bench for 312 hours under these conditions.

During this period there are two treatments with the above-mentioned oily liquid wedge mixture C, consisting of 35% toluene, 25% turpentine oil, 10% castor oil, 15% tetralin, 10% fenchone and 5% amyl acetate, carried out, the first after 68 hours (corresponding to 705 total running hours, example 2) and the second after 290 hours (927 total laps). After before each treatment the lubricating oil is brought to the operating temperature, the experiment proceeds as follows:

Removing the cylinder head, measuring the combustion chamber, replacing the cylinder head, Determination of performance and consumption.

Treatment with the oily liquid mixture according to the invention.

Determination of power and consumption during operation, periodic repetition of measurements, once every 3 hours and once every 13 hours at 70% maximum output, to determine the time-dependent improvement in performance. Removal of the cylinder head and measuring of the combustion chamber.

Because instead of premium petrol regular petrol, instead of the cleaning oil SAE 30, pure mineral oil (SAE 30) is used and a mixture with 4% pure mineral oil (SAE 50) is added to the engine, the performance decreases quickly and regularly after 68 hours of running to 8.81 hp.

The test results are given in Tables 2. 3, 4 and 5 as well as in FIGS. 3 and 4 shown. It can be seen from Table 5 that the mean increase the power to the end is 9.1% and a minimum of 7.2% at 2750 rpm and a maximum of 10.5% at 3500 rpm. surprising effects also result from the middle one Own consumption in the speed range between 2500 and 3500 rpm. This consumption is reduced from 345 g / PSh before treatment with the mixture according to the invention (Table 2) to 332 g / PSh 3 hours after treatment (Table 4) which means a 3.84% gain.

ίο Table 2 shows the performance curve, the torque curves and the internal consumption, depending on speeds between 3500 and 1500 rpm, before treatment with the mixture according to the invention. In Fig. 3 the torque and in Fi g. 4 the power plotted against the speed, the curves e, e ' the course before the treatment, the curves /, /' the course before the treatment, the curves g, g 'the course after 3 hours of running time after the treatment and the curves / 1, h 'show the course after running on the test bench for 13 hours after the treatment. This clearly shows an increasing increase in power and torque after the treatment with the oily liquid mixture of the present invention, even in the case of molors provided with deposits or stuck together or resinified.

Then after the 13 hour measurement The treatment is in turn an examination for deposits on the piston rings carried out, which lasts 210 hours. The previously determined drop in performance can, however, in this Period cannot be reproduced. This leads to the conclusion. that the detachment effect of the erfindungsgcmüßcn Liquid mixture continues. This is supported by the fact that the engine after further 400 hours of running time with an oil-gasoline mixture thanks to its torque and self-consumption shows that there is only one separation in the combustion chamber.

Table 2

Single-cylinder gasoline engine 68 hours before treatment

Atmosphere: pressure 743 mm Hg, temperature 18 "C, Humidity 70%.

number of revolutions power Torque ownconsumption Lubricant-
temperature Rpm PS mkg g / PSh ⁰ C 350G 8.86 1.81 369 82 3250 9.02 1.99 336 83 3000 8.81 2.10 329 85 2750 8.70 2.26 334 85 2500 8.11 232 355 84 2250 7.44 7.37 - 83 2000 6.61 237 - 83 J 750 5.82 233 - 83 1500 4.98 2.38 - 83 Average - - 345 -

2830

9

Table 3
Single-cylinder gasoline engine after 68 hours of running

Atmosphere: pressure 741.5 mm Hg, temperature 18 ° C, Humidity 75%.

power absolutely increase Torque ownconsumption increase Schmicrmiliel- number of revolutions PS % mkg absolutely tcmperature Rpm 9.29 4.8 1.90 g / PSh -6.5 3500 9.26 2.7 2.04 345 + 3.6 82 3250 9.16 4.0 2.19 348 + 4.7 82 3000 8.68 -0.2 2.26 343 -2.1 33 2750 8.22 1.4 2.35 327 -4.7 85 2500 7.58 1.9 2.41 339 - 84 2250 6.74 2.0 2.41 - - 84 20 (M) 5.99 2.9 2.45 - - 84 1750 5.15 3.1 2.46 - - 84 1500 2.5 _ .. - -1.4 84 Average 340 _

Table 4
Single-cylinder gasoline engine 3 running hours after treatment

Atmosphere: pressure 741 mm Hg, temperature 17 ° C.

Fmirhtiukeil 77%

number of revolutions Lcis
absolutely ung
increase Torque Properties
absolutely abuse
increase Smeared
temper Rpm PS mkg g / PSh % C. 35 (X) 9.43 6.4 1.93 326 -11.6 86 3250 9.48 5.1 2.09 346 + 3.0 87 3000 9.37 6.4 2.24 330 + 0.3 87 2750 8.95 2.9 2.33 329 - 1.5 87 2500 8.37 3.2 2.40 327 - 7.9 88 2250 7.74 4.0 2.46 - - 88 2000 6.94 5.0 2.48 - - 87 1750 6.09 4.6 2.49 .— 86 1500 5.22 4.8 2.49 - 85 Average - 4.7 - 332 - 3.8 -

Table 5
Single-cylinder gasoline engine running for 13 hours after treatment

Atmosphere: pressure 743 mm Hg. Temperature 13 'C, Humidity 80%.

power absolutely increase Torque ownconsumption Lubricant- number of revolutions PS % mkg g / PSh temperature Rpm 9.75 10.5 2.00 C. 3500 9.91 9.9 2.18 - 84 3250 9.69 10.0 2.31 - 85 3000 9.33 7 2 2.43 - 85 2750 8.76 8.0 2.51 - 86 2500 8.09 8.5 2.57 86 ' 2250 85

2830

.Vi

continuation

power absolutely increase Torque ownconsumption Lubricant- number of revolutions PS % temperature 7.21 9.1 mkg g / PSh Rpm 6.34 8.9 2.58 - ° C 2000 5.36 7.6 2.59 - 85 1750 9.1 2.56 - 84 1500 83 Average

Table 6

Single-cylinder gasoline engine after treatment at 956 total hours of operation. The increases are calculated on the basis of the pre-treatment values

Quiet
absolutely The atmosphere: Print 751 mm Hg.
Temperature 17 C.
Humidity 61%. Own ve abuse lubricant
temperature number of revolutions PS lung
increase Torque g PSh % C. Rpm 9.94 % mkg - 86 3500 08/10 2.2 2.03 - - 87 3250 10.03 3.4 2 22 301 -5.3 88 3000 9.66 5.3 2.39 - - 89 2750 9.19 6.0 2.51 - - 90 2500 8.41 7.1 Z63 - - 90 2250 7.49 8.2 2.68 - - 90 2000 6.50 8.1 Z68 - - 90 1750 5.51 9.1 2.66 - - 89 1500 9.3 2.63 Average 6.5

From Table 6 it can be seen that the performance at 3000 rpm was 5.3% over the performance before Treatment, that is, to 10.03 HP after the 956 total hours of operation has risen, thereby increasing the engine power roughly corresponds to the performance at the beginning of the term. The consumption has increased from 318g / PSh reduced to 301 g / PSh, i.e. by 5.3% at 3000 rpm, while the mean power increase over a speed range from 1500 to 3500 6.5% amounts to.

By removing the head, it can be observed that the piston crown and the Combustion chamber are covered with a dense layer of carbon, in particular in the vicinity of the exhaust valve is very strong. This deposit is no longer present after the treatment, and the The lead deposits held by this flake off, are free and are removed. All in all the cylinder, cylinder cover interior and piston crown are clean, as are those previously tight coated areas around the valve.

After 956 total hours of operation, the engine is removed and the liner and piston rings are worn and the oil scraper ring examined. As can be seen from Table 7, these parts do not have any Deposits on. The mechanical wear is negligible and uniform over the Cross-section distributed. A deposit on the lubricant ducts cannot be determined will.

Table 7
Wear test on the single-cylinder gasoline engine after 956 hours of running

size

Cylinder bore in the plane of the crank

Cylinder bore

in the plane of the piston pin

o. T.
u. T.
o. T.
u. T.

New motor To It. Manufacturer 956 running hours mm 80 80.03 mm 80 80.03 mm 80 80.02 mm 80 80.02

/ (A

915767

To identify possible corrosion of the engine parts or influence on the lubricant the Lombardini engine is allowed to continue running through the oily liquid mixture according to the invention 1000 test bench hours have been reached. During this period of time, the treatment with the inventive Mixing has been carried out after 170, 620, 708 and 930 hours. After completion of the trial period shows after disassembly an examination of the engine parts, that through the oily liquid mixture a performance and service life there is no reducing corrosion effect.

The experiments listed above show that by treating an internal combustion engine with a longer running time with the oily liquid mixture according to the invention, the compression almost reaches its initial value again, for example a compression which has fallen ^{to about 10 kg / cm 2} increases ^{by 2.0 kg cm 2.} The liquid mixture dissolves the carbon deposits on the surface so that the metal and / or lead salts flake off, dissolve and are easy to remove. Compared to the state before the treatment, an increase in performance of up to 10% was found a few hours after the treatment. The mean increase in power is directly proportional to the increase in compression. In the FIAT 1500 engine, the increase in compression by 2.0 kg / cm ^{2 was accompanied by} an increase in power of 10.5% (Table 1). If the deposits only occurred on the piston rings, the increase in performance was even greater (Tables 2, 3, 4, 5). With the increase in power, a reduction in fuel consumption can be observed at the same time, which ranges from 3.8 to 5.3%.

The advantages of treatment with the oily liquid mixture according to the invention therefore exist that the carbon deposits on the walls of the combustion chamber and on the piston

rings are detached, so that the metal deposits adhering to these deposits do not can stick more and be removed from the engine. This means that there are no high requirements with regard to the knock resistance of the

the fuel, and the engine runs at almost its original output. By the distance of the deposits from the valve and valve seat as well as on the piston rings, the compression increases, see above that the engine at the original design

data works. The examples show that there is an increase in compression around Vio Atmosphere of a 1% increase in performance or a 1% decrease fuel consumption is accompanied. The engine parts exposed to the treatment will corrode

not, so that in a treatment of engines for ground, field, air and sea vehicles about all of them 30,000 to 40,000 km or a running time corresponding to such a number of kilometers the service life is increased significantly without turning the engine on

known way has to be overhauled. The appearance of the "ringing", of pre-ignition and Auto-ignition is eliminated. The optimal combustion equilibrium of the original design is therefore retained.

Of course, the oily liquid mixture according to the invention can also be used where descaling is required, which is caused by a carbon and carbon dioxide from the combustion Metal deposition originates.

For this purpose 2 sheets of drawings

Claims (8)

Patent claims: 1. Oily detergent containing toluene to restore the original compression and performance of an internal combustion engine, characterized in that it consists of 5 to 45% pure toluene, 5 to 45% turpentine oil, 5 to 45% castor oil, 5 to 45% tetralin, 5 to 45% fenchone and 5 to 45% vinyl acetate. 2. Oily cleaning agent according to claim 1, characterized in that it is 25% pure Toluene, 15% turpentine oil, 12.5% castor oil, 11% Tetralin, 25% fenchone and 11.5% amylaceta consists. 3. Oily cleaning agent according to claim 1, characterized in that it is 30% pure Toluene. 20% turpentine oil. 15% castor oil, 10% tetrad. 20% fenchone and 5% amyl acetate consists. 4. oily cleaning agent according to claim I, characterized in that it is made from 35% pure toluene. 25% turpentine oil, 10% castor oil, 15% Tetralin. 10% fenchone and 5% amyl acetate. 5. A method for cleaning an internal combustion engine using the cleaning agent according to claim 1 to 4, characterized in that the mixture with the engine stopped by a suitable opening in the combustion chamber of the cylinder; eight »Wrd. being the coolant already at a temperature of at least 90 C and / or the Schmie. medium a temperature of at least 80 C that the mixture in the combustion chamber at about 30 minutes closed filler opening and then by starting and running the engine together with the detached substances is removed through the exhaust pipe. 6. The method according to claim 5, dadurc !: characterized, that the treatment of the individual cylinders is carried out one after the other while avoiding partial cooling of the engine. 7. The method according to claim 5 to 6, characterized in that the combustion chamber at Two-stroke internal combustion engines is limited by the piston located in top dead center. 8. The method according to claim 5 to 6, characterized in that the combustion chamber at Four-stroke internal combustion engines is limited by the piston, which is in a position between the compression and expansion stroke is located, the combustion chamber being completely sealed is.