DE2263243A1 - METHOD FOR LUBRICATING TWO-STROKE AND ROTARY LISTON ENGINES - Google Patents

Description

The goal-lying invention "relates to the lubrication of two-stroke and rotary piston engines.

It is known that the lubrication of two-stroke engines depends on the Engine type either by means of one previously mixed with gasoline or a lubricant that is not mixed with gasoline, which is then introduced into the gasoline-air mixture and thus further transported can be carried out. In the latter pail, the bearings can either be fed to the motor in this way Lubricant or can be lubricated by an unmixed lubricant that is used exclusively for the engine this purpose "is supplied to a certain independent cycle ·

In all cases, the lubricant will eventually end up in the Combustion chamber where it is burned and the products of its combustion are expelled.

It is the same with the rotary piston engines, in which the seam lubrication of the tooth edges and the bearing certain lubricants

3 09828/0804

Received on ^ £ Lli W

is supplied in a mixture with the fuel.

It is also "known that the properties of the oils commonly" used in lubricating two-stroke engines "and, above all, their anti-pest effect _(of the piston and the bearings and against jamming of the piston in the cylinder make it necessary to To ensure sufficient operational safety, these oils must be used in relatively large quantities (often more than 5 wt. # and always at least 2 wt.? S in relation to the fuel).

The use of such amounts of oil that are far higher than those at The quantities used in four-stroke engines have numerous disadvantages:;

- E3 large quantities of more or less cracked oil are emitted;

- the fuel-lubricant mixture is poorly burned and large amounts of belly are expelled

This creates particularly harmful pollution, whether it is air pollution or in the case of two-stroke outboard engines is the pollution of the water surface.

Another disadvantage is that it is in the combustion chamber and deposits form in the exhaust system, which lead to a deterioration in engine performance and frequent dismantling of the engine.

It is the aim of the present invention to provide a new method to create the lubrication of two-stroke engines with which the used The quantities of lubricant are considerably reduced and the aforementioned disadvantages are thereby reduced to a considerable extent can, with the operational reliability of the engine at least as much is good as with the methods used so far.

3 0> t H > 8/0 8 Q U

It is also the object of the present invention to provide new fuel-lubricant compositions for two-stroke engines that have a lower content of lubricant.

Another object of the present invention "is to provide a To create an advantageous method for the lubrication of rotating cage motors.

Another object is to provide improved fuel-lubricant compositions for rotary basket engines.

It has been found that in the case of two-stroke engines, and especially two-stroke petrol engines, the one used The amount of lubricant can be reduced by adding a sufficient amount of one or more derivatives to the lubricant of polyalkylene glycols added.

One can use the polyalkylene glycol derivatives to which it is in the present Invention goes, so define that it consists of the etherification of polyalkylene glycols, the esterification of polyalkylene glycols or ethers of polyalkylene glycols or the polyesterification ' derived from polyalkylene glycols.

The polyalkylene glycols used as starting materials correspond to the general formula HO - (R-O) - H, in which the radicals R, which can be the same or different, are divalent aliphatic Radicals with e.g. 2 to 5 carbon atoms and η is an integer of, preferably 2 to 5 ©. You generally have a molecular weight of about 100 to 4,500.

Particularly suitable are the polyethylene glycols, the polypropylene glycols or the ethylene glycol and propylene glycol mixed compounds.

The derivatives of polyalkylene glycols which come into consideration in the present invention can on the one hand be polyalkylene glycol ethers which result from the etherification of at least one of the two

3 0 9 B 7 B / Q 8CU

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Hydroxyl functions of a polyalkylene glycol with at least one Monohydroxylverbindungen and / or at least one Polyhydrcoqrlverbindungen come.

They can then correspond to one of the following general formulas:.

R ₁ -O (RO) _a 'H (I) and R ^1. , [-0 (l-0) _n H] _m (II)

in which R ^ is the hydrocarbon _{radical of a monohydroxyl compound R 1} OH, monoalcohol, or mono phenol, and contains, for example, 1 to 25 carbon atoms;

R ¹ ^ is the hydrocarbon ^{radical of a polyhydroxyl compound R 1} ^ (OH) _1n and can, for example, be an aliphatic radical with 3 to 20 carbon atoms, the valence of which m can have a value of 2 to k .

Examples of such monohydroxyl compounds are n-butanol, isooctanol, ethyl-2-hexanol, isodecanol or dodecylphenol, and examples of polyhydroxyl compounds R ¹ ^ (OH) _{1n are} neopentyl glycol, 1,6-hexanediol, glycerol, called the trimethylolpropane or the pentaerythritol.

The ethers of polyalkylene glycols can also have the following general Formulas correspond to:

₁ -0 (RO) _n R ₁ (III) and R ^ ₁ [-0 (R - 0) _n R ₁ 1 (IV)

in soft the radicals R ^ and R ¹ .. and the number m have the same meaning as above.

The derivatives of polyalkylene glycols which are suitable in the present invention can also be esters of polyalkylene glycols or esters of polyalkylene glycol ethers.

8/0804

In this case they can come from the esterification of a polyalkylene glycol by a monocarboxylic acid. You then correspond of the following general formula:

'H ₂ - σ - o 4 R - o> _a σ - B ₂ (ν) ·. ο ο.

in which the radicals Rp, ^ ^{e can be the} same or different, are hydrocarbon radicals of monocarboxylic acids and contain, for example, 1 to 25 carbon atoms «,

You can also from the esterification of a polyalkylene glycol ether of the above formula (I) are derived from a monocarboxylic acid or a polycarboxylic acid such as a dicarboxylic acid then correspond to one of the following general formulas *

H ₂ -CO (RO) _n R ₁ '(VI) 0

and R ₁ -O (RO) _n CR ₃ -OO (RO) _n R ₁ (VIl)

0 0

in which R ₁ and R _{2 have} the same meaning as defined above and R is the hydrocarbon radical of a dicarboxylic acid and contains, for example, 1 to 34 carbon atoms.

You can also from the esterification of a polyalkylene glycol ether of the above formula (II) by a monocarboxylic acid come. They then correspond to the following general formula:

Ri ₁ [-0 (R-O) _n C-R ₂ ] _m (VIII).

in which R ^, R ₂ and m have the same meaning as defined above.

3 0 ^r * ·] 'R / 0 8 0

Examples of monocarboxylic acids are heptylic acid, ethylhexane monocarboxylic acid, Pelargonic acid, lauric acid, tridecan monocarboxylic acid, Crystalline acid, Obtadecanmonocarbonsäure or commercially available fractions such as the fatty acid of coconut or tallow or benzoic acid and, as examples of dicarboxylic acids, adipic acid, azelaic acid, sebacic acid, trimethyl-2,2,4-adipic acid, Dodecanedicarboxylic acid, the isononadecanedicarboxylic acids, the Acids derived from the dimerization of unsaturated fatty acids with e.g. 18 carbon atoms, the alkenyl succinic acids or called the phthalic acids.

Of the esters of polyalkylene glycols and the esters of polyalkylene glycol ethers, as defined above are the following specific compounds of particular interest given as examples:

- The bis-octadecenoate of a polyethylene glycol dea molecular weight of about 600, the bis-dodecanoate of a polypropylene glycol having a molecular weight of about 1050 and the bisheptanoate a polypropylene glycol having a molecular weight of about 2,000 and corresponding to the above formula (V);

- The adipate of the condensation of an ethylene oxide and propylene oxide mixture (50/50 in parts by weight) obtained with the n-butanol and an average of about 30 alkylene oxide elements per molecule ε of the ether contained; it corresponds to the aforementioned formula (VII);

- the trisheptanoate of the condensation of an Xthylenoxid- and propylene oxide mixture.es (50/50 in parts by weight) with the Trimethylolpropane obtained and containing an average of about 24 alkylene oxide elements per molecule of the ether; it corresponds of the aforementioned formula (VIII).

The derivatives of polyalkylene glycols which are suitable in the present invention can also be complex esters and polyesters of polyalkylene glycols.

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The polyesters of the polyalkylene glycols can be obtained from polyesterification a polyalkylene glycol by a polycarboxylic acid, ζ.B, a dicarboxylic acid, optionally in the presence of at least a monocarboxylic acid or at least one monohydroxyl compound originate from a monoalcohol, a monophenol or a monohydroxyl ether of a polyalkylene glycol and a monoalcohol or a monophenol.

The polyesters can correspond to one of the following general formulas:

HO- Γ C- R, - C - 0 (R-Of 1 H (IX)

L ö d ρ

HO - (RO) _n - [(J - R ₃ - G - 0 fR ~ O-> _n ] - H. (X)

1-R ₃ -CO- (RO) Jg-R ₂ (XU)

{0 - [~ C - R - CO - (RO) 1 C - R_ - Cj - 0 R ₁ (XIIl) Lq .0 "TpO υ

R ₁ O - (R.-0) _n , [- C- R ₃ -CO - (RO) _n J - g - R ₃ - § - 0 (Ϊ

■. (XIV)

_R η - Yr'-O ^ -Ic-R -CO- (RO) -Q-Ro-ff ™ ^0R i (^) R ₁ O ^ R OJ _n , ^ M ₃ . ^ ' _n J g 3 g 1

(In this latter case, of course, molecules of the formulas (XIII) and (XIV) can coexist with molecules of the formula (XV)).

In the formulas (IX) to (XV), R ₁ , R ₂ and R- have the same meaning as given above, R ¹ has the same meaning

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direction like R, n ¹ like η and p-, which indicates the degree of polycondensation of the polyester, has a value which is above 1, for example between 2 and 10 or above.

The complex esters correspond in particular to the formulas (XIl) to (XV), in which the number ρ is equal to 1.

As specific examples of the complex esters and polyesters of polyalkylene glycols as defined above, the following may be mentioned: t

- The polyesters of sebacic acid ^ and a polypropylene glycol of molecular weight 400, which at 98.9 ⁰ C have a viscosity of about 850 cSt; Depending on the proportions of the constituents, they correspond to one of the aforementioned general forms (IX), (X) and (XI);

- the polyester of adipic acid and a polypropylene glycol of molecular weight 400 which is blocked by the lauric acid and C has a viscosity of about 88 cSt at 98.9 ^0; it corresponds to the aforementioned general formula (XII).

The derivatives of polyalkylene glycols used in the present invention can also be blocked or unblocked complex esters and polyesters as defined above in which at least a portion of the polyalkylene glycol is replaced by a polyalkylene glycol ether of the formula R · [- 0 (R - 0) hJ is replaced, in which R ¹ .. and m have the same meaning as given above.

In this case, in particular, those between one mole of di-. carboxylic acid HO-CR ₅ -C- OH, two moles of polyalkylene glycol

0 0

ether R ^ [-0 (EO) _n H] _n and (2m-2) mol of monocarboxylic acid R ₂ -C-OH formed complex esters into consideration. 0

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Specific examples of complex esters of this type are those between 2 moles of one obtained by condensing the propylene oxide with the S trimethylolpropane obtained ether, 1 mole of a dimeric satire (obtained by thermal dimerization of oleic and linoleic acid) and 4 moles of Iiauric acid called ester formed

Also suitable are, for example, between two moles of bicarboxylic acid HO-CR ₅ -C-OH, 3 moles of polyalkylene glycol ether R ^ [-O ^ RO ^ h] ^

■ 0 .. ·. 0: ■■ / ,. . . "· .;. ■" ■ ■■ · ■ '·.: ■.'■; ■ '. ■, - .; ■ · '■ ; and (3m-4) moles of monocarboxylic acid R ₂ -C-OH formed polyester, us

. · ■ - '. ■ - ■, '0 ■■■■ "■' ■ '\:' i ^: ' ^: -:' - '. ■', ■

In general, the method according to the invention for lubricating two-stroke engines consists in adding a portion of a lubricant (in relation to for the operation of the engine required amount of fuel), which contains 20 to 100 Gew _# # of one or more of the above-defined derivatives of polyalkylene glycols

As a mixture with the polyalkylene glycol derivative (s), the lubricant, within the limits of mutual miscibility, contain other ingredients, especially certain common lubricants, especially

- lubricating oils of mineral origin

- synthetic lubricating oils, such as products from Oligomerization or the polymerization of olefinic hydrocarbons, such as polybutenes, which optionally contain a have undergone final hydrogenation treatment, simple EsterTOn common monoalcohols or polyols, like that Isodecyl adipate, ethyl 2-hexyl azelate or trimethylolpropanecaprylate, as well as complex esters or polyesters of common monoalcohols or polyols.

If necessary, certain diluents such as light petroleum fractions, e.g. white spirit, kerosene, a jet fuel, certain aromatic solvents such as petroleum fraction

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with high boiling point and certain oxygen-containing solutions: agents such as alcohols (e.g. isononanol), ketones (e.g. cyclohexanone) or certain esters (e.g. acetates or propionates from heavy alcohols).

If you have a polyalkylene glycol derivative mixed with a mineral oil wants to use, it is of course advisable to use a polyalkylene glycol derivative that is sufficiently compatible with the Can mix mineral oils, so has a sufficient "oleophilic balance". These derivatives are generally those "in which the ratio between the number of coal face atoms of their hydrocarbon groups and the number of alkylene oxide elements its polyalkylene glycol chains is quite high. This ratio must also be higher «the more ethylene oxide in relation to the total alkylene oxides the starting polyalkylene glycol and the more paraffinic the mineral oil used and / or the higher the viscosity it has.

In addition, the lubricant used in the process of the invention must have suitable viscometric properties for each pail have, in particular a viscosity which at 98.9 ° C is above about 6 cSt and preferably between about 8 to 15 cSt lies.

In the method of the invention for lubricating two-stroke engines it is obvious that the amount of lubricant supplied to the engine in relation to the amount of fuel used the greater the proportion of, the more it can be reduced Is polyalkylene glycol derivative in the lubricant. So while the proportion of a lubricant measured in relation to the fuel, which contains only a small amount of polyalkylene glycol derivative, generally 0.5 to 2 wt. # Must be, mostly : about 1 wt. #, this portion only needs 0.1 to 1 wt. #, mostly to be about 0.5 wt. # if the lubricant has a contains a larger proportion of polyalkylene glycol derivative.

On the other hand, it can, if this is done with one or more polyalkylene glycols mixed lubricants at least one

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contains another synthetic lubricant, be that a proportion of polyalkylene glycol derivative of only 10 wt. $ is sufficient; seihst but in this case, a proportion of at least 20 wt. io still preferable "

The term used in the preceding description, "Lubricant" "refers to the base lubricant used. It goes without saying and is generally recommended that one, to get the final lubricant, do different common additives can be added, namely. .

- antioxidants, e.g. of the phenol or amine type, e.g. at a proportion of $ 0.1 to $ 10 in proportion to weight the lubricant;

Surface share additives in the form of organic salts and ashless dispersants, for example in a proportion of 0.05 to 30 % and preferably 5 to 20 % in relation to the weight of the lubricant.

You can also add certain halogen-containing substances to the basic lubricant Add derivatives such as ethylene dibromide, which are the lead compounds eliminate bulbs that are in the combustion chamber can occur if the fuel used contains lead (tetraethyl or tetramethyl lead). .

In the case of two-stroke engines operated with a fuel-lubricant mixture, there are. according to the invention lubricant-fuel mixtures of a conventional fuel which an amount was added to finished lubricants, the amount of a base lubricant as defined above of 0.1 to 2 wt.% relative to the said fuel, such as 0.5 to 2 $, particularly about 1 $ if the said basic lubricant contains a smaller proportion of polyalkylene glycol derivative, and 0.1 to 1 $, in particular about 0.5 $, if the said basic lubricant contains a larger proportion of polyalkylene glycol derivative.

The lubrication method and fuel-lubricant compositions described above apply to air or water-cooled two-stroke gasoline engines of land and water vehicles.

The present invention also relates to the lubrication of Rotary piston engines and proposes a lubrication method for these analogous to that of the two-stroke engines, in which, however, the relative The amount of lubricant relative to the fuel is generally 50 parts per million to 2% by weight.

Likewise, in the case of the rotary piston engines operated with a fuel-lubricant mixture, the fuel-lubricant compositions proposed in the present invention consist of a conventional fuel to which an amount of lubricant end product has been added which corresponds to a basic lubricant amount of 50 ppm to 2 wt. % in relation to the specified fuel.

The examples given below serve to illustrate the present invention, but are in no way considered to be Restriction.

According to the usual esterification methods, one has the following Polyalkylene glycol derivatives produced:

^ £ odukt_I: bis-octadecenoate of a polyethylene glycol of molecular weight 600 ^;

- viscosity at 37.8 ⁰ C 66.9 cSt

at 98.9 ⁰ C .. 12.7 cSt

- Viscosity index (VIg) ..... ..... 205

- Acid index ...... 1.2 mg / g

- Soluble in gasoline.

Product_II: bis-dodecanoate of a polypropylene glycol of molecular weight 1050

- viscosity at 37.8 ⁰ C 71.0 cSt ¹

3Of '·' B / 0 8 0 U

Viscosity at 98.9 ⁰ C 13.2 cSt

Viscosity Index (VLg) 201

Acid index. . ····· ············ * 1 mg / g

Flow point .. <- 30 ⁰ O

Can be mixed with mineral oils and petrol.

Product_III:

Adipate of an ether obtained by condensing an ethylene oxide and propylene oxide mixture (50/50 in parts by weight) with n-butanol (the ether contains an average of 30 alkylene oxide elements per molecule).

—Viscosity at 37.8 ⁰ O. ............. 352 cSt

at 98.9 ° 0 61.3 cSt

- Not miscible with mineral oils.

- Soluble in esters of dicarboxylic acids (eg isodecyladlpat) and in gasoline.

Product ^ IV:

Trisheptanoate by condensing an ethylene oxide and Propylene oxide mixture (50/50 in parts by weight) with trimethylolpropane obtained ether (the ether contains an average of 24 Alkylene oxide groups per molecule).

- viscosity at 98.9 ⁰ C. 14.3 cSt

- Not miscible with mineral oils.

- Soluble in gasoline.

Product V:

Esters formed between 2 moles of an ether obtained by condensing propylene oxide with trimethylolpropane and a mixture of lauric acid (4 moles) and a "dimer acid" (1 mole); (The "dimeric acid" consists of a mixture of dicarboxylic acids obtained by thermal dimerization of oleic and linoleic acid)

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The ether contains an average of 22 propylene oxide elements per molecule.

-Viscosity at 98.9 ° C. 32 cSt

- Residual acid index ...... 1.4 mg / g

- Soluble in light mineral oils.

- Can be mixed with gasoline.

The products Ibbis V described above are basic lubricants Abia E, the composition of which is given in the table below.

Table I.

Designation
of
Lubricant
tel composition Weight # mineral oil
150 neutral Isodecyl
adipate viscosity
at 98.9 ° C
(cSt) A.
B.
C.
D.
E. Polyalkylene glycol
colloid derivative 100
100
40
80
45 Weight # 12.7
13.2
12.8
11.1
12.3 Designation
tion uS I I 1 I 60
20th Product I.
Product II
Product IE
Product IV
Product V

Piston jamming tests on the Motob & cane AV7I engine «

(Protect Keeen from plague-eating the piston).

One has the 1 Gew.Jf and 0.5 Gew.i fuel-lubricant mixtures containing lubricants A to E of Table I were tested using a commercial

changed gerni-ß received on,. "^

Lich oil, which was used in a 5% mixture, as a reference product took. (The oil X consists mainly of a mineral oil). ". · -. ·"

The same commercially available oil X is also used in mixtures of 5 wt. Fo and 1 wt. # ,. another, designated T commercially available oil in a mixture to 1 wt _e # and a third <p with Z designated commercially available oil in a mixture to 5f ° tested. ■ The oil Y consists mainly of a polybutene and the oil Z of a mineral oil »·

The test consists in that the rise in temperature of the spark plug zen ^ elbow is measured, which is caused by a speed drop of the motor of 400 revolutions per minute as a result of a Jamming of the piston in the cylinder has been caused, which occurs when the cooling of the motor is interrupted. A lubricant is the better, the higher the temperature »» is the increase that the respective lubricant allows »

The results II listed in the table below are expressed in percentage ^of improvement _'lim relation to the reference product, and was obtained as follows: -

, ^{A θ} . - ^{Δ 8} O

% Improvement / = χ 100

Λθ _ο

where Δ Q ₁ and Δ θ _{ο represent} the temperature rise that was measured for the tested product and for the reference product, respectively.

3 0 'Ι; : ·! / 080 /.

Table II

changed

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tested product Share in that
Gasoline (wt. $) Improvement / be
tensile product (\%) Commercial oil X
It
II
Commercial oil Y
Commercial oil Z 5
3
1
1
5 0
- 4.3
-15
-20
+ 1.2 Lubricant A
Lubricant B
Lubricant B
Lubricant 1 »C
Lubricant DD
Lubricant E.
Lubricant E. 1
. 1
0.5
1
1
1
0.5 + 6.1
+29.1
+ 7.2
+ 3.2
+ 9.0
+19.7
+ 2.4

Furthermore, clamping tests with those marked with P and G have been carried out Lubricants carried out the mixtures of polypropylene glycol polyesters (Products YI and VII) and isodecyl adipate.

Product VI was obtained from polypropylene glycol of molecular weight 400 and sebacic acid. It comprises at 98.9 ⁰ C a viscosity of 850 cSt and an acidity index from 7.5 mg / g.

Product VII was obtained from 400 molecular weight polyethylene glycol and adipic acid. It is blocked by the lauric acid. Its viscosity at 98.9 ⁰ C is 88 cSt and its acid number 1.4 mg / g.

Mixtures F and G contain 14% by weight of product VI and 40% by weight, respectively Product VII; the 100% supplement in both cases is isodecyl adipate.

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The ones with the $ 1. lubricants contained in the fuel Clamping tests carried out in P and G have analogous results those that have been achieved with the lubricants A to E mentioned above.

The results of the above Klemmungsversuche show that you can use when using the method of the invention a proportion of 1 wt%. And sometimes even 0.5 wt.% Lubricant in relation to gasoline, while an equally good, if not better protection against the Jamming of the piston achieved than with the usual lubricants.

It was expected that the use of a smaller amount of lubricant would reduce the pollution of the engine. The results of the pollution tests described below prove this.

Lubricants (B ^{1 and E 1} ) obtained by adding 20% by weight of a multifunctional additive (surfactant, antioxidant and rust inhibitor) of the trade name "Oloa 34OD" (registered trademark) to each of the base lubricants B and E have been tested. was added. The • ^l fuel lubricant "mixtures both contained 0.5 $ lubricant B ¹ and E ¹ in a lead-free gasoline with the research octane number 94 ·

For comparison, you have two to 4 and 5 # in the same fuel Classic lubricants contained in two-stroke engines tested »

The soiling test carried out according to the OEC 1 402 T 68 method lasted 100 hours. It consists of different operating phases, including a phase with a throttled engine. It is representative of an actual operation of a longer duration. The results are shown in Table III below.

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Tabel III Z 2263 243 Lubricant composition X 5 B ¹ E ^{1 c} / o lubricants id fuel 4th 36.6 0.5 0.5 Constipation of the muffler $ 71 10 16.1 19.2 Veratopfg. the exhaust port. i » 5 35g 0 0 Weight of the deposit
id muffler 70g 0 17g 21g Malfunctions in the spark plugs 1 0 0 Measured values for the piston - before Freedom of movement of the piston rings; 0 1. Piston ring 9.5 0 10 10 2. Piston ring 5 7.1 10 10 Varnish on the piston skirt 7.9 9.8 9.8 Combustion residues in the
Piston grooves: 0 1st groove 0 9.8 9.0, 2nd groove 0 10 8.8 Varnish in the piston grooves: 0 1st groove 0 0 8.5 6.8 2nd groove 0 2 10 8.6 Varnish on the piston crown 0.25 9.6 9.6 9.1 Varnish on the inner wall
of the piston 2.5 6.2 10 10 Combustion residues on the
Piston crown 9.3 8.2 7.1 5.4 Scarring of the piston crown 9 0 9.2 8.6 Varnish on the piston band 0 7.3 9.7 8.2 Varnish on the walls of the
Cylinder 9.4 10 10

These results show that the products according to the invention are in virtually every respect superior to the commercially available oils tested. In addition to these results, the almost complete disappearance of the oil expelled through the exhaust and the absence of any smoke should be noted.

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With a vehicle from the NSU brand, type Ro 80, with a twin-rotor rotary engine of the type KKM 612, 20,000 km of urban, rural road and driving on the motorway. The oil that passes through the main lubrication line flows and enters the fuel through the oil injection device at the level of the petrol pump, consisted of the Lubricant composition E described in Example 1, which contains an appropriate amount of a multifunctional cleaning, antioxidant, Anti-rust and anti-foam additives have been added was. The fuel used was an ordinary commercial one Petrol.

There was no engine malfunction during this test. When taking apart a particularly weak wear of the apex tooth edges and the complete absence of characteristic signs of wear parallel to the rotor axis as a result of a friction effect on the walls of the stator have been found. Also is no abnormal deposits were found in the combustion chambers or in the openings.

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Claims (14)

Changed a «? T5« * 3 ESInput € received on Λf "* 'r-y 1) method of lubricating a gasoline-powered two-stroke engine, characterized in that the engine consists of a base lubricant and customary additives and a Lubricant composition with a viscosity of at least 6 cSt at 98.9 ° 0 to a proportion that corresponds to a basic amount of lubricant from 0 »! up to / 2 wt. ^ in relation to. the corresponds to the amount of fuel required for the operation of said engine, is supplied and that said Base lubricant 10 to 100% by weight of at least one polyalkylene glycol derivative contains, which is an ether, simple ester, complex ester, polyester or ester of ethers of Polyalkylene glycols can be those of the general formula HO (R - 0) _n H correspond, in which each radical R is a divalent aliphatic radical having 2 to 5 carbon atoms and which
Number η has a value from 2 to 50. 2) Method according to claim 1, characterized in that one at least one derivative of a polyethylene glycol, a polypropylene glycol or a poly (ethylene glycol-propylene glycol) mixed compound is used. 3) Method according to claim 1, characterized in that one uses a polyalkylene glycol ether that corresponds to one of the following general formulas: R ₁ - O {■ R - O * _n H (I) \ Γ, 1 R ¹ J- OfR-O * H (II) R ₁ ~ 0 {· R - 0> _n R ₁ (III)
^ ₁ T-OfR-Ol _n R ₁ ] (IV) / -'i-iV? S / 0804 received on .. '2 2 ^ ^ 2-4 3 in which R and η have the same meaning as "in claim 1, each radical R is the hydrocarbon radical of a monohydro: xyl compound, namely a monoalcohol r; or a monophenol with 1 Ms 25 carbon atoms, each radical H ¹ ^ is a hydrocarbon radical of a polyol having 3 "to 20 carbon atoms and m has a value of 2" to 4 _s 4) Method according to claim 1, characterized in that one a simple polyalkylene glycol ester of the general formula B ₂ -OO (RO ^ OB ₂ (Y) ' O 0 used, in which R ^ and η have the same meaning as in claim 1 and each Rp radical is the hydrocarbon radical of a monocarboxylic acid and 1 Ms of 25 carbon atoms is holds': 5) Verfa hr s according to claim 1, characterized in that _g is used an ester of a Polyalkylenglykoläthers corresponds to the one of the following general Pormeln: R ₂ -C - 0 f R - 0 ^ _n R ₁ . . (VI) - 0- (RO) _n - C - R ₃ - JJ-OfR-O ^ B ₁ (VII) y L ■ - ο <r R - ο ) _n c - R ₂ °] _m (viii) in which R and η have the same meaning as in claim 1, each radical R ^ the hydrocarbon radical of a monohydroxyl compound, namely a honey alcohol or a monophenol with 1 to 25 carbon atoms, the radical R ^ is a hydrocarbon radical of a polyol with 3 to 20 carbon atoms, the Rp radical is the hydrocarbon radical of a monocarboxylic acid and contains 1 to 25 carbon atoms, the remainder being R- Is the hydrocarbon radical of a dicarboxylic acid and is 1 to 34 Contains carbon atoms and m has a value of 2 to 4. 3 0 Ί,: - V,! 0 8 0 k ~ ²² "2262243 6) Method according to claim 1, characterized in that one is a Polyalkylene glycol derivative used, which is a polyalkylene glycol polyester, which corresponds to one of the following general formulas: ¹¹⁰ "fw -» 3 - Jj - 0 f R - 0 * J] t (ix) HO - (R - O) _n - [CRC-OfR-O) - JH (χ) 0- ⁵ O ⁿ ρ HO -TC - R ₃ - C - O f R - O)] - CRC- Oil (Xl) O O · ■ ■ * O O - C - O - (R - O) _n -f "c - R - C - O <- R - O *"] CR "(XIl) ^L 0 ^J Ö ^nj p0 ^ R ₁ OL- g - R ₃ - jj - O f R - O)] - CR ₃ -J-OR ₁ (XIII) - O fR "- O) -, R ₁ (XiV R ₁ O - (R. - 0) _n , [- g - B ₃ - S - 0 - (RO)] "1-R ₃ -C-OR ₁ (XV, in which R and R ¹ and η and n ^{1 have} the same meaning as R or η in claim 1, each R _{1 is} the hydrocarbon residue of a monohydroxy compound which can be a monoalcohol or a monophenol having 1 to 25 carbon atoms, each Remainder R _? is the hydrocarbon radical of a monocarboxylic acid and contains 1 to 25 carbon atoms, each radical R is the hydrocarbon radical of a dicarboxylic acid and contains 1 to 34 carbon atoms, and each number ρ has a value above 1, or is a complex ester which is one of the general formulas (XIl) to (XV), in which the number ρ is equal to 1. 7) Method according to claim 6, characterized in that a polyalkylene glycol derivative is used, which one of the in claim 6 defined polyester and complex ester iet, in 309 8 28/0804 which at least part of the polyalkylene glycol by one Polyalkylene glycol ether of the following general formula replaced is: Rt ₁ [- 0 4R- 0> _n H] in which R and η have the same meaning as in claim 6, R '. a hydrocarbon residue of a polyol with 3 to 20 Is carbon atoms and m has a value from 2 to 4 " 8) Method according to claim 6, characterized in that one between one mole of dicarboxylic acid HO-CR ^ -C-OH ₉ two moles 0 0 polyalkylene glycol ether R ^ [- 0 4 R - 0> _n h] _m and (2m-2) moles of monocarboxylic acid R ₀ -C-OH formed complex esters <= Ti 0 applies, where R, R * ^, Rp, R *, η and m have the same meaning as in claim 6 _O 9) Method according to claim 1, characterized in ₉ that the basic lubricant contains 20 to 100 wt. $ Of at least one polyalkylene glycol derivative. 10) The method of claim 1, characterized in that the basic lubricant contains a minor portion of Polyalkylengly "= kolderivat and that the power supplied to the motor portion of the lubricant composition of a base lubricant amount of 0.5 to 2 percent by _e% relative to that of the operation specified engine corresponds to the required amount of fuel, 11) The method according to claim 1, characterized in, that the Basic lubricant has a larger proportion of polyalkylene glycol derivative contains and that the proportion of lubricant composition supplied to the engine has a base lubricant quantity "of 0.1 up to 1 wt. $ in relation to the amount of fuel required to operate the specified engine 3 0 °. : ■ / ') / 0 80 4 12) Kxaftstoff-lubricant mixture for a gasoline-powered two-stroke engine, which is composed of a common fuel and a ^{lubricant composition consisting of a basic lubricant and common additives and having a viscosity of at least 6 cSt at 98.9 0} C, characterized in that the proportion of lubricant composition s it ion corresponds to a basic lubricant amount of 0.1 to \ 2 wt. # in relation to the said fuel and that the said basic lubricant is as defined in one of claims 1 to 9. 15) method of lubricating a gasoline-powered rotary piston engine, characterized in that the engine is supplied with a proportion of a lubricant composition consisting of a basic lubricant and customary additives, which is a basic amount of lubricant from 50 wt.ppm to 2 wt. # in the ratio corresponds to the amount of fuel required to operate said engine and that said basic lubricant is as defined in any one of claims 1 to 9, 14) Fuel-lubricant mixture for a gasoline-powered one Rotary piston engine, which consists of a common fuel and a basic lubricant and common additives existing lubricant composition, characterized in that the proportion of lubricant composition a basic amount of lubricant from 50 ppm to 2% by weight Ratio to said fuel corresponds and that said basic lubricant as in one of the claims 1 to 9 is defined. 0 9 8 2 8/0 8 0 4