LUBRICATING OIL COMPOSITIONS

PROBLEM TO BE SOLVED: To provide a method of reducing the occurrence of low speed pre-ignition (LSPI) in a high-output spark-ignited internal combustion engine.SOLUTION: There is provided a method of preventing or reducing the occurrence of low speed pre-ignition (LSPI) in a direct-injected, boosted...

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Bibliographische Detailangaben
Hauptverfasser:	JOSE A GUTIERREZ, RITCHIE ANDREW J D, BOESE DOYLE H
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BLASTING CHEMISTRY COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES CRANKCASE VENTILATING ENGINE PLANTS IN GENERAL FUELS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING LUBRICANTS LUBRICATING COMPOSITIONS LUBRICATING INTERNAL COMBUSTION ENGINES LUBRICATING OF MACHINES OR ENGINES IN GENERAL MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METALLURGY PEAT PETROLEUM, GAS OR COKE INDUSTRIES STEAM ENGINES TECHNICAL GASES CONTAINING CARBON MONOXIDE USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATINGINGREDIENTS IN A LUBRICATING COMPOSITION WEAPONS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method of reducing the occurrence of low speed pre-ignition (LSPI) in a high-output spark-ignited internal combustion engine.SOLUTION: There is provided a method of preventing or reducing the occurrence of low speed pre-ignition (LSPI) in a direct-injected, boosted, spark-ignited internal combustion engine that, in operation, generates a break mean effective pressure level greater than about 1.5 MPa (about 15 bar), at an engine speed of about 1,500 to about 2,500 rotations per minute (rpm). In the method, a crankcase of the engine is lubricated with a lubricating oil composition containing at least about 0.2 mass% of magnesium sulfated ash. 【課題】本発明は、高出力の火花点火式内燃機関における、低速早期点火(LSPI)の発生を減じる方法を提供することを目的とする。【解決手段】作動中に、エンジン速度1分当たり約1,500〜約2,500回転(rpm)において、約1.5MPa(約15bar)よりも高い正味平均有効圧力レベルを発生する直接噴射、給気、火花点火式内燃機関における低速早期点火(LSPI)の発生を防止または減じる方法であって、該方法において、該エンジンのクランクケースは潤滑油組成物で潤滑され、該潤滑油組成物は、少なくとも約0.2質量％のマグネシウム硫酸灰分を含む。【選択図】図１