EXPERIMENTS ON KNOCKING AND ABNORMAL COMBUSTION THROUGH OPTICAL DIAGNOSTICS IN A BOOSTED SPARK IGNITION PORT FUEL INJECTION ENGINE

Sementa, Paolo and Merola, Simona Silvia and Tornatore, Cinzia (2011) EXPERIMENTS ON KNOCKING AND ABNORMAL COMBUSTION THROUGH OPTICAL DIAGNOSTICS IN A BOOSTED SPARK IGNITION PORT FUEL INJECTION ENGINE. International journal of automotive technology, 12 (1). pp. 93-101. ISSN 1229-9138

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Abstract

In this paper, flame front propagation during normal and abnormal combustion was investigated. Cycleresolved flame emission imaging was applied in the combustion chamber of a port fuel injection-boosted spark ignition engine. The engine was fueled with a mixture of 90% iso-octane and 10% n-heptane by volume (Primary Reference Fuel 90: PRF90) and commercial gasoline. The combustion process was monitored from the flame kernel formation until the exhaust valves opened. Different phenomena associated with abnormal combustion were analyzed, including the fuel deposition burning. Moreover, the ignition surfaces and end-gas auto-ignitions were investigated in terms of timing, location and frequency of occurrence. The analysis was performed by considering different knocking intensities for both the selected fuels.

Item Type:	Article
Uncontrolled Keywords:	SI engines; Boosting; Knocking; Optical diagnostics
Subjects:	600 Tecnologia - Scienze applicate > 620 Ingegneria e attivita' affini > 629 Altri rami dell'ingegneria > 629.2 Veicoli terrestri a motore; Cicli > 629.25 Motori (Classificare qui il controllo dell'inquinamento) > 629.2503 Motori a combustione interna
Depositing User:	Rosina Serpe
Date Deposited:	05 Jan 2012 10:47
Last Modified:	05 Jan 2012 10:47
URI:	http://eprints.bice.rm.cnr.it/id/eprint/3781

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