Patent SG-11201901515T-A (SG)
Title: Method for controlling electrical conductivity of lubricating oils in electric vehicle powertrains
Inventor: Flores-Torres Samuel
IPC: C10N40/25
Filed: 2017-10-06
Abstract: 1 O 0\ N O GC O 1-1 N C (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 12 April 2018 (12.04.2018) omit n OH iolo X01101100 X111 M011100 EMOVOIMIE (10) International Publication Number WO 2018/067903 Al WIPO I PCT (51) International Patent Classification: C/0M 171/00 (2006.01) ClON 30/12 (2006.01) ClON 10/04 (2006.01) ClON 40/02 (2006.01) ClON 20/00 (2006.01) ClON 40/04 (2006.01) ClON 30/10 (2006.01) ClON 40/25 (2006.01) (21) International Application Number: PCT/US2017/055489 (22) International Filing Date: 06 October 2017 (06.10.2017) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/405,285 07 October 2016 (07.10.2016) US 15/725,734 05 October 2017 (05.10.2017) US (71) Applicant: EXXONMOBIL RESEARCH AND EN- GINEERING COMPANY [US/US]; 1545 Route 22 East, P.O. Box 900, Annandale, NJ 08801-0900 (US). (72) Inventors: FLORES-TORRES, Samuel; 37 Steeplechase Blvd., Burlington, NJ 08016 (US). HOLT, David, G.L.; 18 Saddler Drive, Meddford, NJ 08055 (US). CAREY, James, T.; 1 Vemetta Lane, Medford, NJ 08055 (US). (74) Agent: MIGLIORINI, Robert A. et al.; Exxonmobil Re- search And Engineering Company, 1545 Route 22 East, P.O. Box 900, Annandale, NJ 08801-0900 (US). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). Declarations under Rule 4.17: as to applicant's entitlement to apply for and be granted a patent (Rule 4.17(ii)) as to the applicant's entitlement to claim the priority of the earlier application (Rule 4.17(iii)) Published: — with international search report (Art. 21(3)) (54) Title: METHOD FOR CONTROLLING ELECTRICAL CONDUCTIVITY OF LUBRICATING OILS IN ELECTRIC VEHICLE POWERTRAINS (57) : This disclosure relates to a method for minimizing the electrical drainage of charged electrical powertrain components, a method for controlling electrical conductivity over a lifetime of a lubricating oil in an electric vehicle powertrain lubricated with the lubricating oil, and a method for obtaining a desired electrical conductivity -to-dielectric constant ratio of a lubricating oil for an electric vehicle powertrain and powertrain components. The methods relate to controlling at least one of oxidation, deposit formation and corrosion over the service lifetime of the oil. The lubricating oil has a composition including a lubricating base oil as a major component, an additive package, as a minor component, and an effective amount of one or more conductivity agents, as a minor component. The lubricating oil has an electrical conductivity from 10 pS/m to 20,000 pS/m, a dielectric constant of 1.6 to 3.6, with a ratio of electrical conductivity -to-dielectric constant from 5 to 10,000.