LUBRICATING OIL COMPOSITIONS

LUBRICATING OIL COMPOSITIONS

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 brake mean effective pressure level of greater than about 1,500 kPa (15 bar), at an engine speed of from about 15...

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Hauptverfasser: GUTIERREZ, JOSE A, RITCHIE, ANDREW J.D, BOESE, DOYLE H
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Sprache:eng
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creator GUTIERREZ, JOSE A
RITCHIE, ANDREW J.D
BOESE, DOYLE H
description 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 brake mean effective pressure level of greater than about 1,500 kPa (15 bar), at an engine speed of from about 1500 to about 2500 rotations per minute (rpm), in which the crankcase of the engine is lubricated with a lubricating oil composition containing at least about 0.2 mass % of magnesium sulfated ash provided by overbased detergent containing overbased magnesium-based detergent and overbased calcium-based detergent.
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title LUBRICATING OIL COMPOSITIONS
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