(19)
(11) EP 1 696 021 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.02.2007 Bulletin 2007/09

(43) Date of publication A2:
30.08.2006 Bulletin 2006/35

(21) Application number: 05388100.9

(22) Date of filing: 21.11.2005
(51) International Patent Classification (IPC): 
F01M 9/02(2006.01)
 C10M 175/00(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 30.12.2004 WO PCT/DK2004/000929
30.12.2004 US 27573

(71) Applicant: A.P. Moller - Maersk A/S
1263 Copenhagen K (DK)

(72) Inventors:
  • Natoli, Guiseppe
    10143 Turin (IT)
  • Pometto, Giulio Giovanni
    10155 Turin (IT)
  • Bonciolini, Alfio
    10152 Turin (IT)
  • Petersen, Hans Heinrich
    2680 Solrod Strand (DK)
  • Dragsted, Jorn
    3450 Allerod (DK)
  • Olesen, Claus Martin
    3400 Hillerod (DK)
  • Damm, Klaus-Werner
    Chagrin Falls, Ohio 44022 (US)

(74) Representative: Boesen, Johnny Peder et al
Zacco Denmark A/S Hans Bekkevolds Allé 7
2900 Hellerup
2900 Hellerup (DK)

   


(54) Method and system for improving fuel economy and environmental impact operating a 2-stroke engine


(57) 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 oil/consumable 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.







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