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US 2026/0265635 A1Published application
Lubricating oil composition
AssigneeIdemitsu Kosan Co., Ltd.
InventorsMotoharu ISHIKAWA, Yasunori SHIMIZU
Life of this patent
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Abstract
Provided is a lubricating oil composition containing a base oil (A) having a NOACK value of 6 mass % or less as measured by a NOACK test performed at 250° C. for 1 hour in accordance with ASTM D5800, wherein a CCS viscosity at −25° C. is 7,000 mPa·s or less, and an HTHS viscosity at 150° C. is 2.9 mPa·s or more.
Claims13
1:
- A lubricating oil composition comprising a base oil (A) having a NOACK value of 6 mass % or less as measured by a NOACK test performed at 250° C. for 1 hour in accordance with ASTM D5800,
- wherein a CCS viscosity at −25° C. is 7,000 mPa·s or less, and
- an HTHS viscosity at 150° C. is 2.9 mPa·s or more.
2:
- The lubricating oil composition according to claim 1, further comprising a calcium-based detergent (B) comprising at least a calcium salicylate (B1) and optionally comprising one or more selected from a neutral calcium sulfonate (B2) with a base number of 70 mg KOH/g or less and a calcium phenate (B3),
- wherein a ratio of a content (b2) of the neutral calcium sulfonate (B2) in terms of calcium atoms to a content (b) of the calcium-based detergent (B) in terms of calcium atoms, [(b2)/(b)], is 0 to 0.40, and
- a ratio of a content (b3) of the calcium phenate (B3) in terms of calcium atoms to the content (b) of the calcium-based detergent (B) in terms of calcium atoms, [(b3)/(b)], is from 0 to 0.02, and
- wherein the composition is used in an internal combustion engine that runs on hydrogen as a fuel.
1 more element
3:
- The lubricating oil composition according to claim 1, further comprising a viscosity index improver (C),
- wherein a content of the viscosity index improver (C) in terms of resin is 0.40 mass % or less based on the total amount of the lubricating oil composition.
4:
- The lubricating oil composition according to claim 1, which is suitable for an internal combustion engine that runs on hydrogen as a fuel and is equipped with a turbocharger.
5:
- A method for lubricating an internal combustion engine, comprising applying the lubricating oil composition according to claim 1 to the lubrication of an internal combustion engine.
6:
- The method for lubricating an internal combustion engine according to claim 5, wherein the internal combustion engine is an internal combustion engine that runs on hydrogen as a fuel and is equipped with a turbocharger.
7:
- The lubricating oil composition according to claim 2, further comprising a viscosity index improver (C),
- wherein a content of the viscosity index improver (C) in terms of resin is 0.40 mass % or less based on the total amount of the lubricating oil composition.
8:
- A method for lubricating an internal combustion engine, comprising applying the lubricating oil composition according to claim 2 to the lubrication of an internal combustion engine.
9:
- A method for lubricating an internal combustion engine, comprising applying the lubricating oil composition according to claim 3 to the lubrication of an internal combustion engine.
10:
- A method for lubricating an internal combustion engine, comprising applying the lubricating oil composition according to claim 7 to the lubrication of an internal combustion engine.
11:
- The method for lubricating an internal combustion engine according to claim 8, wherein the internal combustion engine is an internal combustion engine that runs on hydrogen as a fuel and is equipped with a turbocharger.
12:
- The method for lubricating an internal combustion engine according to claim 9, wherein the internal combustion engine is an internal combustion engine that runs on hydrogen as a fuel and is equipped with a turbocharger.
13:
- The method for lubricating an internal combustion engine according to claim 10, wherein the internal combustion engine is an internal combustion engine that runs on hydrogen as a fuel and is equipped with a turbocharger.