KR20070097559A - Method and system for improving fuel economy and environmental impact operating a 2-stroke engine - Google Patents

Abstract

The present invention relates to a method of and a corresponding system for reducing fuel consumption and environmental impact in a two-stroke engine, comprising the steps of obtaining system oil/consumable system oil (301') from at least one engine (300), adding (102) at least one friction modifier (101) to at least a part of the obtained system oil/consumable system oil (301'), where the addition of the at least one friction modifier (101) reduces the friction coefficient of the obtained system oil/consumable system oil (301'), resulting in a system oil/consumable system oil with reduced friction (301 "), and supplying said system oil/consumable system oil with reduced friction (301 ") to said at least one engine (300). In this way, frictional losses caused by contamination of the system oillconsumable system oil are avoided or minimised, which normally take place as the oil is used and which would otherwise cause a continuous decrease in engine efficiency resulting in increased fuel consumption and emissions. In addition, the present invention related to a method and a corresponding system to convert system oil/consumable system oil into cylinder oil. Finally, the present invention relates to a method to use a consumable system oil as it is being converted into cylinder oil. This furthermore allows for the consumable system oil to contain a lower performance additive package and/or additive treat rate. Thus great economical savings and environmental improvements are achieved.

Description

Method and system for improving fuel economy and environmental impact operating a 2-stroke engine}

The present invention relates to a method for reducing fuel consumption, lubricant complex and environmental impact in two-stroke engine operation. The invention also relates to a system for reducing fuel consumption, extended lubricant usage and environmental impact in a two-stroke engine.

Two-stroke cross-head engines used in marine and / or stationary applications are equipped with two separate lubricating oil systems. One lubrication system comprises so-called system oils which are generally used for the activation and / or adjustment of various valves and the like, as well as for the lubrication and cooling of engine bearings and for example oil-cooled pistons. Other lubrication systems include all-loss lubricants (cylinder oils) commonly used for lubrication of engine cylinders, piston rings and piston skirts.

In a typical two-stroke cross-head engine, cylinder oil is continuously consumed at every turn of the engine, whereas system oil is in principle (except in case of minor unexpected leakage). ) Not consumed. Lubrication systems comprising cylinder oil are also sometimes referred to as "all-loss" lubrication systems because the oil is consumed. The use of these types of both system oil (s) and cylinder oil (s) is well known in the art.

Cylinder oils typically contain certain additives that act to reduce, minimize or neutralize the acid level of the cylinder system.

Conventional cylinder oils generally have a Society of Automotive Engineering (SAE) viscosity of about 50 and generally have a total BN (base number of about 40 to 70) for the neutralization of acid products produced during the combustion process. )) Conventional system oils generally have a SAE viscosity of about 30 and a relatively low BN content of typically about 5, providing long life performance. These exemplary values may vary depending on the actual application and the particular system design in which the oil is used.

In recent two-stroke cross-head engine designs that include electronic and / or hydraulic regulation and / or activation of valves, the minimum performance requirements of the system oil may be due to the early use of traditional mechanical regulation / activation. There has been a substantial increase over the design.

Lubricant performance levels are typically measured periodically and should not exceed certain limits if the conditions of the components being lubricated should not be threatened. One cause of performance loss is due to particle contamination. These particles include combustion by-products and worn components, which can be partially removed by an oil separator. However, for two-stroke cross-head engines, one contaminant is the spent cylinder oil leak through the stuffing box, causing both the viscosity and base water of the system oil to increase over time, which is a separator ) Is irreversible. This causes the system oil to gradually degrade with time, increasing wear of the components and reducing engine efficiency. If the system oil is near its condemning limit, it must be replenished or replaced.

The patent specification US 6,074,995 discloses a friction modifying composition comprising an oil with a lubricating viscosity and containing an additive in an amount to reduce friction.

Patent specification US 5,282,990 discloses the addition of a synergistic blend of friction modifiers to the crankcase lubricating oil of internal combustion engines in order to improve fuel economy. However, there is no suggestion on how to apply this for two-stroke diesel engines.

Patent specification EP 0 573 231 discloses triglycerides as friction modifiers added to oils to improve fuel economy in internal combustion engines.

Patent application US 2003/0171223 discloses a lubricating oil composition with improved frictional properties.

It is an object of the present invention to provide a method and corresponding system for reducing fuel consumption and environmental impact in two-stroke engine operation that solve the above-mentioned (and other) disadvantages of the prior art. Another object is to provide this in an easy and efficient way.

Another object of the present invention is to enable improvement of fuel economy or fuel efficiency in a two-stroke diesel engine.

Another object of the invention is to reduce the emissions from a two-stroke diesel engine.

Yet another object of the present invention is to enable the use of consumable system oils that are less complex and provide equivalent performance to conventionally standardized system oils.

It is another object of the present invention to enable the extension of the life of the components of a two-stroke diesel engine.

Another object of the present invention is to provide a more environmentally friendly operation of the engine.

These objects are, among other things: obtaining a system oil / consumable system oil from an engine, adding at least one friction modifier to at least a portion of the system oil obtained, the friction of the oil obtained by adding the at least one friction modifier. Reducing the coefficient, thereby reducing fuel consumption in a two-stroke engine comprising obtaining a reduced friction system oil / consumable system oil and supplying the reduced friction oil to the engine (and Its corresponding system).

 In this way, the fuel consumption of the engine is reduced, i.e., the fuel economy is improved by giving reduced frictional properties to the system oil / consumable system oil fed back to the engine due to the presence of the added friction modifier (s).

In addition, by adding friction modifier (s), there is less friction between components of the engine (s), thereby extending the component operating life. This lowers the frequency of maintenance and saves costs.

In addition, by adding the friction modifier (s) according to the invention, less fuel is used because the friction between the engine components is reduced and the exhaust gas in the engine (s) is reduced.

In one embodiment, the one or more friction modifier (s) is an ash-less friction modifier.

In one embodiment, the one or more ashless friction modifiers are based on di-, tri- and / or tetra-esters and / or fatty amides of dimeric acids and / or fatty acids.

In other embodiments, the one or more ashless friction modifiers are based on neopentylglycol, pentaerythritol, sorbitol, trimethylpropanol, glycerol and / or triethanolamine or mixtures thereof.

In one preferred embodiment, the one or more friction modifiers are based on one or more selected from the following group:

Triglycerides (of animal and / or plant origin) such as rape seed, soy bean and / or castor oil

Fatty acid phosphate,

Fatty acid amides,

Fatty acid epoxide,

Boronated fatty acid epoxides,

Fatty acid amines, for example triethanolamine,

Polyol esters such as glycerol, pentaerythritol, neopentylglycol, sorbitol, trimethylpropanol,

Boronated polyol ester alkoxylated fatty acid amines,

Borated alkoxylated fatty acid amines,

Metal salts of fatty acids,

Sulfurized olefins,

Fatty acid imidazolines, and

The mixture.

In one embodiment, one or more friction modifiers are added at a predetermined ratio such that the concentration of the friction modifier (s) added has a concentration of 0.2-2.0% of the system oil / consumable system oil having the reduced friction.

In another embodiment, one or more friction modifiers are added at a predetermined ratio so that the concentration of friction modifier (s) added has a concentration of 0.5-1.5% of the system oil / consumable system oil having the reduced friction.

In an alternative embodiment, the method comprises the use of consumable system oil and / or reduced additive treat rate comprising the simplified additive composition.

In one embodiment, the method is used offshore, on-site, on-board a vessel, and / or in a land based plant. do.

In a preferred embodiment, the method comprises: tapping a predetermined first amount of system oil / consumable system oil to provide a tapped oil and also adding a predetermined second amount of (more) new to the remaining system oil / consumable system oil. (fresh (er)) system oil / consumable system oil), wherein tapping and / or replenishment is performed continuously, almost continuously or intermittently.

In another preferred embodiment, the method comprises: measuring one or more important parameters (eg, BN, viscosity, permittivity / capacity and / or elemental composition) of the tapped oil, and determining one or more desired parameters of the cylinder oil (eg For example, one or more important parameters of the tapped system oil / consumable system oil (e.g., by measuring BN, viscosity, dielectric constant / capacity and / or elemental composition) and thus mixing the tapped oil with one or more BN modifying additives. Adjusting the BN, viscosity, dielectric constant / capacity and / or elemental composition) to produce a cylinder oil, thereby producing a cylinder oil based on the tapped system oil / consumable system oil, and Supplying a cylinder or part of the cylinder of the engine.

In one embodiment, the system oil is selected from the following group:

Conventional system oils comprising additives for long life performance or formulated at additive-rate to provide long life performance; And

Consumable system oils formulated with reduced additive-rate without or with long life performance additives.

The invention also relates to a system for reducing fuel consumption in a two-stroke engine, which corresponds to the method of the invention and has the same advantages for the same reason.

More specifically, the present invention relates to a system for reducing fuel consumption of a two-stroke engine, which system adds one or more friction modifiers to at least a portion of the resulting system oil / consumable system oil and adds the one or more friction modifiers. Reduces the coefficient of friction of the resulting system oil / consumable system oil to produce a reduced friction system oil / consumable system oil and also provides the reduced friction system oil / consumable system oil to the one or more engines. And a blending unit for.

Preferred embodiments of the system according to the invention are defined in the dependent claims and are described in more detail below. Implementations of the system correspond to implementations of the method and have the same advantages for the same reason.

These and other aspects of the invention will be apparent from the example implementations shown in the drawings, and will also be described in detail with reference to the example implementations above:

1 shows a schematic block diagram of an implementation according to the invention;

2A and 2B show the effect of the invention during the test.

1 shows a schematic block diagram of one implementation according to the invention. A schematic depiction is shown of one or more two-stroke cross-head diesel engines 300. The engine comprises one lubrication system comprising so-called system oil 301 which is generally used for lubrication and cooling of engine bearings, for example oil-cooling pistons, and for activation and / or adjustment of various valves and the like. Other lubrication systems include an all-loss lubricant or cylinder oil 302 commonly used for lubrication of engine cylinders, piston rings and piston skirts.

Engine 300 corresponds to a well-known two-stroke engine of the prior art, except as described below.

Also illustrated is a friction reforming method / system 100 that reduces fuel consumption in a two-stroke engine according to the present invention. The friction reforming method / system 100 obtains the system oil 301 'from one or more engines 300, and the controller or blending unit 102 obtains at least one of the oils 301' obtained from the one or more friction modifiers 101. Some). The addition of one or more friction modifiers 101 reduces the coefficient of friction of the oil / consumable system oil 301 ′ obtained, resulting in a reduced friction system oil 301 ″, which is the engine (s) as system oil ( 300 is supplied again.

This avoids or minimizes frictional losses caused by contamination of system oils / consumable system oils, which generally occur when oils are used and, if not avoided or minimized, can significantly reduce efficiency, increase fuel consumption and exhaust gases. Causes an increase. By avoiding this, large economic ones can be achieved.

The system oil is preferably selected from the following group:

Conventional system oils comprising additives for long life performance or formulated at additive-rate to provide long life performance; And

Consumable system oils formulated with reduced additive-rate without or with long life performance additives.

Preferably, the friction modifier (s) 101 is ashless friction modifier, which will be based on di-, tri- and / or tetra-esters and / or fatty amides of dimer acids and / or fatty acids. Can be.

Ashless friction modifier (s) may also be based on neopentylglycol, pentaerythritol, sorbitol, trimethylpropanol, glycerol and / or triethanolamine or mixtures of two or more thereof.

In a preferred embodiment, the at least one friction modifier is: triglycerides such as castor oil, fatty acid phosphates, fatty acid amides, fatty acid epoxides, fatty acid amines such as boronated fatty acid epoxides such as triethanol, for example glycerol , Polyol esters such as pentaerythritol, neopentylglycol, sorbitol, trimethylpropanol, boronated polyol ester alkoxylated fatty acid amines, borated alkoxylated fatty acid amines, metal salts of fatty acids, sulfided olefins, fatty acid imidazolines or their It can be based on one or more of the mixtures.

The friction modifier (s) can also be other compounds disclosed, for example, in the cited prior art and the like. See, for example, patent specifications US 4,792,410 and US 5,110,488.

According to one embodiment, the friction modifier (s) 101 is added in a predetermined ratio such that the added friction modifier (s) 101 is 0.2-2.0 of the system oil / consumable system oil with reduced friction 301 ". In another embodiment, the friction modifier (s) 101 is added in a predetermined ratio such that the added friction modifier (s) 101 has a reduced system oil / consumability with reduced friction (301 "). Has a concentration of 0.5-1.5% of the system oil. According to another embodiment, the controller or blending unit 102 changes the rate of the friction modifier 101 added according to a predetermined scheme, ie the same ratio does not always need to be used.

According to one embodiment, the system oil / consumable system oil is a consumable system oil having a reduced and / or modified additive composition to reflect reduced oil life.

The invention can be used, for example, off shore, on site, on a ship and / or in a ground based plant and the like.

In a preferred embodiment according to the present invention, the system / method further comprises a tapping and replenishment system / method 200, wherein the controller 202 comprises a predetermined amount of the obtained system oil / consumable system oil 301 ′. Tapping, providing a tapped oil 203, and adding a residual system oil / consumable system oil 301 'to a second predetermined amount of (more) fresh (er) system oil / consumable system oil ( 201) to replenish. In this way, part of the system oil / consumable system oil to which the friction modifier is to be added is replenished. Alternatively, tapping and / or replenishment may be done continuously, almost continuously, intermittently or in accordance with other suitable schemes.

As the used system oil / consumable system oil is tapped and supplemented with new unconsumed or less consumed system oil, the resulting system oil / consumable system oil is more consistent in quality and gradual degradation is minimized or avoided. . In this way, improved constant performance of the initial fluid is provided, further reducing component wear and device life costs.

In fact, this provides a 'consumable' system oil / consumable system oil because some of the spent system oil / consumable system oil is tapped and supplemented with fresh or fresher system oil. This is new compared to the system oil / consumable system oil of the prior art, which is maintained in the engine until the system oil / consumable system oil is too degraded for efficient use. This will then have to be exchanged and the spent system oil / consumable system oil will have to be disposed of as waste. Another advantage of the present invention is that the requirements for system oils / consumable system oils in such systems differ from the requirements of the prior art. Standard system oils / consumable system oils in the prior art typically include an additive package to ensure the long life of the system oil. System oils / consumable system oils with prior art additive packages are much more expensive than similar system oils / consumable system oils without prior art additive packages or with novel additive packages designed for “consumable” system oils. The system of the present invention can operate with a system oil / consumable system oil using a reduced and / or modified additive package, which ensures sufficient oil life as it is tapped and replenished. This leads to a reduction in cost, since inexpensive oils can be used in the system. Preferably, the tapped oil is used instead of becoming waste as described below.

The tapping / fill system 200 may be fed directly to the engine or may be part of a separate loop instead of being used to add the friction modifier (s) to the system oil / consumable system oil 301 ′.

In another preferred embodiment, the system / method further comprises a BN reforming system / method 400 for converting the used system oil / consumable system oil into a cylinder oil that can be used. For a detailed description of the implementation of the BN reforming system / method 400, see patent specification US Provisional Application No. 60 / 612,899 and European Patent Application No. 04388064.0, incorporated by reference herein and also incorporated by reference herein.

In this embodiment, the BN (total base number) reforming system / method 400 includes a controller 402 for producing a cylinder oil based on the tapped system oil / consumable system oil 203, which is tapped. The BN of the oil 203 is measured, the desired BN of the cylinder oil 302 is measured, the BN of the tapped oil 203 is adjusted, and thus the tapped oil 203 is added to one or more BN modifying additives 401. ) Adjusts the BN of the tapped oil 203 to produce a cylinder oil 302 ', which is supplied to the cylinder or part of the cylinder of the engine 300.

In this way, a method and system are provided for converting / recycling (used / consumed) system oil / consumable system oil to usable cylinder oil by adjusting BN. This is very economically useful because system oil / consumable system oil can be reused / recycled as a total-loss cylinder lubricant that would ultimately be disposed of. In addition, more efficient consumable system oils may be used. In addition, cylinder oil does not need to be purchased. The system oil / consumable system oil used to blend the cylinder oil maintains a better working quality because it is replenished (as opposed to traditional practice), which reduces mechanical wear and the like. Thus, the replenishment of the initial fluid (s) is improved and provides constant initial fluid performance, greatly reducing component wear and device life costs. In addition, a more environmentally friendly method / system is provided because such waste is reduced because waste in the form of used oil (s) that is disposed of after extended use is converted to cylinder oil.

The BN modifying additive may include, for example, one or more bases. Preferably, the at least one base comprises a basic salt of an alkali metal or alkaline earth metal element, and / or detergents and / or dispersants. Cylinder oil may be produced to have a BN that meets fuel oil characteristics and / or actual engine operating requirements. In addition, the BN of the cylinder oil may be selected based on the sulfur-content of the system oil used. The system oils / consumable system oils used are, for example, lubricants, hydraulic fluids, gear oils, system oils, trunk piston engine oils, turbine oils, heavy duty diesels. Oil (heavy duty diesel oil), compressor oil and the like.

The alkali metal / alkaline earth metal element can be, for example, K, Na, Ca, Ba, Mg, and the like. Basic salts may belong to inorganic species such as, for example, oxides, hydroxides, carbonates, sulfates and the like. Detergents may belong to organic species such as, for example, sulfonates, salicylates, phenates, sulfophenates, Mannich-bases, and the like. Dispersants may belong to organic species such as succinimide and the like.

Alternatively, the conversion of the spent / used system oil / consumable system oil to cylinder oil can be carried out without replenishment, ie the BN reforming system 400 is directly connected to the engine or to the tapping system without replenishment. do.

2A and 2B illustrate the effects of the present invention during testing. FIG. 2A is a graph 210 illustrating the mechanical efficiency of an engine before, during and after use of the present invention in which system oil / consumable system oil from an engine is modified by adding one or more friction modifiers to at least a portion of the system oil. The graph shows a first portion 211 showing the measurements at a period before application of the invention, i.e. typical efficiency, a second portion 212 showing the measurements at a period during the application of the invention and the bone It is divided into a third portion 213 showing the measurement in the period after the application of the invention.

As shown in graph 210 above, the overall mechanical efficiency, ie the ratio of the effective power output from the engine relative to the indicated maximum power output from the engine, is determined by adding one or more friction modifiers according to the present invention. / Consumable system is increased by modifying the oil. More specifically, the mechanical efficiency is generally high during and after the application of the present invention to the second and third portions 212 and 213 of the graph 210.

2B is a graph 210 illustrating power loss of the engine before, during and after use of the present invention. The graph shows the first portion 211 showing the measurement at the period before application of the invention, i.e., the typical efficiency, the second portion 212 showing the measurement at the period during the application of the invention and the It is divided into a third portion 213 showing the measurement in the period after application. As shown in the graph, the total power loss is generally reduced during and after application of the second and third portions 212; 213 of the graph 210, ie.

In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The term "comprising" does not exclude the presence of elements or steps other than those listed in a claim. Singular forms of components do not exclude the presence of plural forms of such components.

Claims (26)

As a method of reducing fuel consumption and environmental impact in a two-stroke engine: Using partially or partially used system oils 301, 301 ′ from new or one or more engines 300, Adding one or more friction modifiers 101 to at least a portion of the new or partially used system oils 301, 301 ′, wherein the system oils obtained by adding the one or more friction modifiers 101 ( Reducing the coefficient of friction of 301, 301 'to obtain a reduced friction system oil 301 ", and Supplying the reduced friction system oil 301 "to the at least one engine 300 How to include. The method of claim 1, wherein at least one of the one or more friction modifiers (101) is an ash-less friction modifier. 3. The method of claim 2, wherein said at least one ashless friction modifier is based on di-, tri- and / or tetra-esters and / or fatty amides of dimeric acids and / or fatty acids. How to. The method of claim 2, wherein the at least one ashless friction modifier is based on neopentylglycol, pentaerythritol, sorbitol, trimethylpropanol, glycerol and / or triethanolamine or mixtures thereof. The method of claim 2, wherein the one or more friction modifiers are based on one or more selected from the following group: Triglycerides (of animal and / or plant origin) such as rape seed, soy bean and / or castor oil Fatty acid phosphate, Fatty acid amides, Fatty acid epoxide, Boronated fatty acid epoxides, Fatty acid amines, for example triethanolamine, Polyol esters such as glycerol, pentaerythritol, neopentylglycol, sorbitol, trimethylpropanol, Boronated polyol ester alkoxylated fatty acid amines, Borated alkoxylated fatty acid amines, Metal salts of fatty acids, Sulfurized olefins, Fatty acid imidazolines, and Its mixture. The method of claim 1, wherein the at least one friction modifier 101 is added at a predetermined ratio such that the concentration of the added friction modifier (s) 101 is 0.2-2.0 of the system oil 301 "having the reduced friction. Characterized in that it has a concentration of%. The system of claim 1, wherein the one or more friction modifiers (101) are added at a predetermined ratio such that the concentration of the added friction modifier (s) 101 is reduced to 0.5-of the system oil 301 "having the reduced friction. Characterized in that it has a concentration of 1.5%. The method of claim 1, wherein the method is offshore, on-site, on-board a vessel and / or in a land based plant. Characterized in that it is used. The method of claim 1 wherein the method is: Tapping 202 a predetermined first portion of said obtained system oil 301 'to provide a tapped system oil 203 and further adding a predetermined second amount of new to said residual obtained system oil 301'. (refresher) further comprising replenishing the system oil (201), wherein the tapping and / or replenishment is carried out continuously, almost continuously or intermittently. The method of claim 1 wherein the method is: Tapping 202 a predetermined first amount of system oil 301 from the engine 300 to provide a tapped system oil 203 and further adding a predetermined second amount of new to the remaining system oil 301. fresher system oil 201, wherein the tapping and / or refilling is carried out continuously, almost continuously or intermittently. The method of claim 9 or 10, wherein the method is: Measuring at least one important parameter of the tapped system oil 203, measuring at least one desired parameter of the cylinder oil 302, and thus converting the tapped system oil 203 into at least one BN modifying additive ( Generating a cylinder oil based on the tapped system oil 203 by adjusting one or more important parameters of the tapped system oil 203 by mixing with 401 to produce a cylinder oil based on the tapped system oil 203. , And Supplying the generated cylinder oil 302 'to a cylinder of the engine 300 or to a portion of the cylinder Method further comprising a. The method of claim 1, wherein the system oil is: Conventional system oils comprising additives for long life performance or formulated at additive-rate to provide long life performance; And -Consumable system oils formulated with reduced additive-rate with no long life performance additives or without providing long life performance. Method selected from the group comprising a. One or more friction modifiers 101 are added to at least a portion of the obtained system oils 301, 301 ′, and the addition of one or more friction modifiers 101 reduces the coefficient of friction of the obtained system oils 301, 301 ′. 2-, comprising a blending unit 102 for producing a reduced friction system oil 301 ″ and also supplying the reduced friction system oil 301 ″ to the one or more engines 300. System for reducing fuel consumption in a stroke engine. 14. The system of claim 13, wherein at least one of said at least one friction modifier (101) is an ash-less friction modifier. The system of claim 13, wherein the one or more friction modifiers are based on one or more selected from the group: Triglycerides (of animal and / or plant origin) such as rape seed, soy bean and / or castor oil Fatty acid phosphate, Fatty acid amides, Fatty acid epoxide, Boronated fatty acid epoxides, Fatty acid amines, for example triethanolamine, Polyol esters such as glycerol, pentaerythritol, neopentylglycol, sorbitol, trimethylpropanol, Boronated polyol ester alkoxylated fatty acid amines, Borated alkoxylated fatty acid amines, Metal salts of fatty acids, Sulfurized olefins, Fatty acid imidazolines, and Its mixture. The land-based plant of claim 13, wherein the system 100 is offshore, on-site, on-board a vessel, and / or land based plant. System). The system of claim 13, wherein the system is: Tapping a predetermined first amount of said obtained system oil 301 'to provide a tapped system oil 203 and further adding a predetermined second amount of fresher to said residual obtained system oil 301'. And a controller (202) for replenishing the system oil (201), wherein the tapping and / or replenishment is performed continuously, almost continuously or intermittently. The system of claim 13, wherein the system is: Tapping a predetermined first amount of system oil 301 from the engine 300 to provide a tapped system oil 203 and to a residual system oil 301 a predetermined second amount of fresher. And a controller (202) for replenishment with the system oil (201), wherein the tapping and / or replenishment is performed continuously, nearly continuously or intermittently. 19. The system of claim 17 or 18, wherein the system is: Measuring at least one important parameter of the tapped system oil 203, measuring at least one desired parameter of the cylinder oil 302, and thus converting the tapped system oil 203 into at least one BN modifying additive ( Mixing with 401 adjusts one or more critical parameters of the tapped system oil 203 to produce a cylinder oil 302 'to generate a cylinder oil based on the tapped system oil 203, and And a controller (402) for supplying cylinder oil (302 ') to the cylinder of the engine (300) or to a portion of the cylinder. The system of claim 13, wherein the system oil is: Conventional system oils comprising additives for long life performance or formulated at additive-rate to provide long life performance; And -Consumable system oil formulated with reduced additive-rate with no long life performance additives or no long life performance. System selected from the group comprising a. The method of claim 1, wherein the method further comprises consumable system oil 301 for use in engine 300, wherein engine 300 comprises a predetermined first portion of system oil from engine 300. Tapping 301 to provide a tapped system oil 203 and to a controller 202 for replenishing the residual system oil 301 with a second predetermined amount of fresher system oil 201. Wherein tapping and / or replenishment is performed continuously, nearly continuously or intermittently. 22. The method of claim 21, wherein the consumable system oil is formulated at reduced additive (s) treatment rate (s). 22. The method of claim 21, wherein the system oil is formulated using additive / constituents and / or base oil (s) selected for economy rather than extended performance. 15. The system of claim 13, wherein the system further comprises consumable system oil 301 for use in engine 300, wherein engine 300 comprises a predetermined first amount of system oil from engine 300. Tapping 301 to provide a tapped system oil 203 and to a controller 202 for replenishing the residual system oil 301 with a second predetermined amount of fresher system oil 201. Wherein tapping and / or replenishment is performed continuously, nearly continuously or intermittently. 25. The system of claim 24, wherein the consumable system oil is formulated at reduced additive (s) treatment rate (s). 25. The system of claim 24, wherein the system oil is formulated using additive / constituents and / or base oil (s) selected for economics rather than extended performance.

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