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US 12,098,347 B2Granted
Lubricating composition for fuel efficient motorcycle applications
AssigneeAfton Chemical Corporation
InventorsHidetaka Hoshino, Akiyuki Honda, Guillaume Carpentier
Life of this patent
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Abstract
The present disclosure relates to lubricating compositions configured for motorcycles and also to methods of lubricating a motorcycle engine, transmission, and clutch assembly with a single lubricating composition that is generally provided from a common sump or reservoir to achieve improved fuel economy.
Claims7
A method of improving the fuel economy of a motorcycle using a lubricating oil composition, the method comprising:
- lubricating an engine crankcase and a transmission including a wet clutch of the motorcycle with a lubricating oil composition from a common sump;
- the lubricating oil composition having a viscosity grade selected from 0W-20, 0W-16, 0W-12, or 0W-8 and including (a) at least one base oil of lubricating viscosity;
- (b) about 14 to about 20 weight percent of a linear non-dispersant poly(meth)acrylate copolymer viscosity modifier having a weight average molecular weight of about 200,000 to about 300,000 and includes (meth)acrylate monomer units with hydrocarbyl groups in a monomer ester moiety thereof having a weight average molecular weight of about 400 up to about 700;
- (c) optionally a molybdenum dialkyl dithiocarbamate;
- and (d) a dispersant, a detergent, a pour point depressant, an antiwear additive, an antioxidant, and a friction modifier;
- wherein the lubricating oil composition has a high-temperature high shear (HTHS) viscosity at 150° C. of 2.9 cP to 3.2 cP and a clutch friction rating of MA, MA1, MA2, or MB when measured pursuant to JASO T 903:2016;
- wherein the fuel economy of the motorcycle is improved as measured pursuant to a WMTC cycle of at least 1 percent better than the fuel economy as measured on the motorcycle using the WMTC cycle when the motorcycle is lubricated with a higher viscosity grade 10W-30 lubricant;
- and
- wherein the lubricating oil composition has a viscosity index of 250 to 350, a KV100 of less than 10 cP, and a ratio of the viscosity index to the treat rate of the linear non-dispersant poly(meth)acrylate copolymer viscosity modifier of about 15 to about 21.
6 more elements
A method of lubricating a crankcase and a wet clutch of a motorcycle, the method comprising:
- lubricating an engine crankcase and a transmission including a wet clutch of the motorcycle with a lubricating oil composition from a common sump;
- the lubricating oil composition having (a) a viscosity grade selected from 0W-20, 0W-16, 0W-12, or 0W-8 and a KV100 of less than 10cP;
- (b) about 14 to about 20 weight percent of a polymeric viscosity modifier selected from a linear non-dispersant poly(meth)acrylate copolymer, wherein the polymeric viscosity modifier has a weight average molecular weight of about 200,000 to about 300,000 and includes (meth)acrylate monomer units with hydrocarbyl groups in a monomer ester moiety thereof having a weight average molecular weight of about 400 up to about 700;
- (c) optionally including about 800 ppm or less of molybdenum provided from a molybdenum dialkyl dithiocarbamate friction modifier;
- (d) a dispersant, a detergent, a pour point depressant, an antiwear additive, an antioxidant, and a friction modifier;
- and (e) a viscosity index of 250 to 350 and wherein a ratio of the viscosity index to the treat rate of the linear non-dispersant poly(meth)acrylate copolymer viscosity modifier is about 15 to about 21;
- the lubricating oil composition exhibits (i) a clutch friction rating of MA, MA1, MA2, or MB when measured pursuant to JASO T 903:2016 and (ii) a high temperature high shear (HTHS) viscosity at 150° C. pursuant to JASO T 903:2016 within about 20 percent of a HTHS viscosity of a 10W-30 lubricant and between 2.9 cP to 3.2 cP;
- and
- wherein the motorcycle lubricated with the lubricating oil composition has a fuel economy measured pursuant to the WMTC cycle of at least 1 percent better than the fuel economy measured on the motorcycle when lubricated with a higher viscosity grade 10W-30 lubricant.
6 more elements
Dependencies are inferred from the claim text.