OS4-3 Combustion Improvement by Using Combination of High Performance Ignition System and Microwave Plasma System(OS4 Plasma-assisted combustion,Organized Session Papers)

Abstract

This study deveroped an innovative microwaye plasma combustion system to improve fuel economy and achieve higher efficiency for spark ignition (SI) engines. Microwave plasma technology was combined with an active ignition system, which generates plasma by applying a high-frequency voltage to the standard spark discharge. A standard ignition coil was used. The high-frequency voltage was research of plasma-assisted combustion hasCopyright @ 2012 by the Japan Society of Mechanical Engineers

Future gasoline engine ignition: A review on advanced concepts

“…Nishiyama introduced an active ignition system employing a standard ignition coil to generate the breakdown across the spark gap and a high-frequency coil to add energy into the formed plasma kernel. 36 Figure 20 shows the principle schematic diagram of the active ignition system. The ignition system was evaluated on the engine at a load of 0.4 MPa IMEP and 2000 r/ min, with 20% EGR.…”

“…In spark plug ignition systems, the spark breakdown forms an electrical connection between the electronics circuits and the flame kernel, which opens a pathway for the electrical ignition energy deposition. In addition to the classical forms of direct current (DC) capacitive and resistive discharge, the follow-up energy can also be supplied through radiofrequency (RF) plasma discharge, such as coupled with high-frequency alternating current (AC) 36,37 and microwave. 38 In a corona ignition system, the inception of streamer discharge generates a non-equilibrium plasma pool, lowering the impedance of gas media for electrical conduction.…”