Title (en)

An upper internal combustion engine cleaning composition

Title (de)

Reinigungszusammensetzung für den Oberteil eines Verbrennungsmotors.

Title (fr)

Composition de nettoyage de la partie supérieure d'un moteur à combustion interne.

Publication

EP 2138557 A1 20091230 (EN)

Application

EP 08015093 A 20080827

Priority

MX 2008007886 A 20080618

Abstract (en)

For decades the slow accretion of carbonaceous deposits on the upper cylinder areas of the internal combustion engines has acted to impair optimum performance and to significantly reduce gasoline or Diesel mileage per gallon. It has now been discovered that these formerly rather intractable engine deposits can be efficiently removed by dispersing and dissolving them through the use of optimized mixtures of polar protic and dipolar aprotic solvents that have the essential capability of acting in concert synergistically. For practical reasons these solvents must have a melting point higher than about 41°F (5°C). The finished product must also have a dielectric constant of about 20 and a pH value of at least 11.0 at 77°F (25°C). These parameters are considered vital to success. For example, in a test using a blend with a dielectric constant of 15, the removal of the carbonaceous deposits was either de minimus or very limited, even at pH values of 12.0 at 77°F (25°C) or higher. However, at a dielectric constant of 20 the degree of removal was quite satisfactory. Preferred compositions of this invention may be utilized in the form of self pressurized (aerosol) dispensers.

IPC 8 full level

C10L 10/06 (2006.01); C11D 7/06 (2006.01); C11D 7/26 (2006.01); C11D 7/32 (2006.01); C11D 7/34 (2006.01); C11D 7/36 (2006.01); C11D 11/00 (2006.01); C11D 17/00 (2006.01); F02B 77/04 (2006.01)

CPC (source: EP)

C10L 10/06 (2013.01); C11D 7/06 (2013.01); C11D 7/261 (2013.01); C11D 7/264 (2013.01); C11D 7/32 (2013.01); C11D 7/3263 (2013.01); C11D 7/3281 (2013.01); C11D 7/34 (2013.01); C11D 7/36 (2013.01); C11D 17/0043 (2013.01); F02B 77/04 (2013.01); C11D 2111/20 (2024.01)

Citation (applicant)

US 4992187 A 19910212 - ADAMS LAWRENCE J [US], et al

Citation (search report)

• [E] US 2009011968 A1 20090108 - HUGHETT PAUL [US]
• [DXY] US 4992187 A 19910212 - ADAMS LAWRENCE J [US], et al
• [YA] WO 9528236 A1 19951026 - ENGINE FOG INC [US], et al
• [X] EP 0580413 A1 19940126 - EXXON RESEARCH ENGINEERING CO [US]
• [X] WO 2006011747 A1 20060202 - ADMS TECHNOLOGY CO LTD [KR], et al
• [X] GB 116010 A 19180530 - PERKINS JOHN BROADBENT
• [X] US 2047191 A 19360714 - BUC HYYM E, et al
• [X] US 1787789 A 19310106
• [X] EP 1610185 A2 20051228 - AIR PROD & CHEM [US]
• [X] WO 2007104746 A1 20070920 - BASF AG [DE], et al
• [X] US 2003060382 A1 20030327 - LEE GEUN SU [KR], et al
• [X] US 5693599 A 19971202 - AOYAMA TETSUO [JP], et al
• [X] JP H04154900 A 19920527 - ASAHI CHEMICAL IND
• [X] WO 2004113461 A1 20041229 - PPG IND OHIO INC [US]
• [A] US 2700005 A 19550118 - KLINGEL JR ARTHUR R
• [A] WO 0246588 A1 20020613 - 3M INNOVATIVE PROPERTIES CO [US]
• [A] US 1176425 A 19160321 - BRISTOL WILLIAM H [US]
• [A] US 2002116782 A1 20020829 - BOWSMAN SHELBA F [US], et al

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

Designated extension state (EPC)

AL BA MK RS

DOCDB simple family (publication)

EP 2138557 A1 20091230

DOCDB simple family (application)

EP 08015093 A 20080827