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Investigations of Engine Oil Effect on Abnormal Combustion in Turbocharged Direct Injection - Spark Ignition Engines (Part 1)~Preventing or Contributing to Low-Speed Pre-Ignition Through Effects of Engine Oil Additives
Published May 23, 2012 by Society of Automotive Engineers of Japan in Japan
Abnormal combustion referred to as Low Speed Pre-Ignition (LSPI) may restrict low speed torque improvements in turbocharged Direct Injection - Spark Ignition Engines. Recent investigations have reported that the auto-ignition of an engine oil droplet in the combustion chamber may cause unexpected and random LSPI. This study shows engine oil formulations have a significant effect, and describes both preventative and contributory effects of engine oil additives on LSPI.