LUBRICANT COMPOSITION

To provide a lubricant composition that has properties, such as emulsification resistance, suitable for an internal combustion engine that operates using hydrogen as a fuel.SOLUTION: A lubricant composition used in an internal combustion engine that operates using hydrogen as a fuel comprises: a bas...

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Bibliographische Detailangaben
Hauptverfasser: SHIMIZU YASUNORI, ISHIKAWA MOTOHARU
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide a lubricant composition that has properties, such as emulsification resistance, suitable for an internal combustion engine that operates using hydrogen as a fuel.SOLUTION: A lubricant composition used in an internal combustion engine that operates using hydrogen as a fuel comprises: a base oil (A) with a NOACK value of 6 mass% or less; and a Ca-based detergent (B) that contains at least Ca salicylate (B1) and may optionally contain one or more selected from neutral Ca sulfonate (B2) and Ca phenate (B3), wherein a ratio [(b2)/(b)] of a content (b2) in terms of Ca atoms of a component (B2) to a content (b) in terms of Ca atoms of a component (B) is 0 to 0.40, a ratio [(b3)/(b)] of a content (b3) in terms of Ca atoms of a component (B3) to the content (b) in terms of Ca atoms of the component (B) is 0 to 0.02, CCS viscosity at -25°C is 7,000 mPa*s or less, and HTHS viscosity at 150°C is 2.9 mPa*s or more.SELECTED DRAWING: None 【課題】例えば、耐乳化性等の水素を燃料として作動する内燃機関に好適な特性を有する、潤滑油組成物が求められている。【解決手段】NOACK値が6質量%以下の基油(A)と、少なくともCaサリシレート(B1)を含み、任意で、中性Caスルホネート(B2)及びCaフェネート(B3)から選ばれる1種以上を含み得る、Ca系清浄剤(B)と、を含有し、成分(B)のCa原子換算での含有量(b)に対する成分(B2)のCa原子換算の含有量(b2)の比率[(b2)/(b)]が0~0.40であり、成分(B)のCa原子換算での含有量(b)に対する成分(B3)のCa原子換算の含有量(b3)の比率[(b3)/(b)]が0~0.02であり、-25℃におけるCCS粘度が7000mPa・s以下であり、150℃におけるHTHS粘度が2.9mPa・s以上である、水素を燃料として作動する内燃機関に用いられる、潤滑油組成物。【選択図】なし