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The Performance and Emission Characteristics of a Multi-Valve Direct Injection Gasoline Engine in the Presence of Corona Discharge
Published November 23, 1995 by Associazione Tecnica Dell'Automobile in Italy
Results from an ongoing investigation into the use of a novel technique to improve the performance of a multi-valve direct injection gasoline engine are presented. It involves generating intensive corona discharges within the combustion air flow. These were created using two horizontally opposed electrode arrays, both parallel to a single centrally mounted flat plate electrode. The creation of such discharges in the combustion air increased the ionization and excitation levels of atoms and molecules, creating new radicals and highly oxidizing species such as atomic oxygen (O) and ozone (O3). These are known to modify some of the key chemical reactions involved in the combustion of hydrocarbons. Measurements of engine torque, power output, fuel consumption and exhaust emissions were obtained at various engine loads and throttle positions under both normal running conditions and in the presence of coronas. Preliminary results show promising improvements in engine performance and emissions, strongly indicating the need for further research in this field.