LUBRICANT COMPOSITION AND METHOD FOR USING LUBRICANT COMPOSITION

To provide the lubricant composition and the method for using the lubricant composition, wherein the lubricant composition has high sustainability of an effect of suppressing deposit formation that can occur in a compressor, and can maintain high efficiency of the compressor for a long time, when us...

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Bibliographische Detailangaben
Hauptverfasser:	FUJIMOTO KOSUKE, SUNAHARA KENJI, YAMAMORI KAZUO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	CHEMISTRY FUELS LUBRICANTS LUBRICATING COMPOSITIONS METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION
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Beschreibung
Zusammenfassung:	To provide the lubricant composition and the method for using the lubricant composition, wherein the lubricant composition has high sustainability of an effect of suppressing deposit formation that can occur in a compressor, and can maintain high efficiency of the compressor for a long time, when used in a diesel engine equipped with a turbocharger with a compressor outlet temperature of 190°C or higher.SOLUTION: The lubricant composition for use in the diesel engine equipped with the supercharger comprises a base oil (A) containing poly-α-olefin (A1) and a viscosity index improver (B) with a SSI (shear stability index) of 20 or less, wherein a distillate content of light fractions at 496°C or less in a gas chromatographic distillation test is less than 80% by volume.SELECTED DRAWING: None 【課題】コンプレッサー出口温度が１９０℃以上と高温となる過給機を搭載するディーゼルエンジンに用いた場合において、コンプレッサー内に生じ得るデポジット形成の抑制効果の持続性が高く、コンプレッサーの高い効率性を長時間維持し得る潤滑油組成物、及び当該潤滑油組成物の使用方法を提供する。【解決手段】過給機を搭載するディーゼルエンジンに用いられる潤滑油組成物であって、ポリ−α−オレフィン（Ａ１）を含む基油（Ａ）と、ＳＳＩ（せん断安定性指数）が２０以下である粘度指数向上剤（Ｂ）とを含有し、ガスクロマトグラフ法蒸留試験における４９６℃以下の軽質留分の留出量が８０容量％未満である、潤滑油組成物。【選択図】なし