The feasibility of microwave plasma employed in auto ignition was demonstrated by simulation design and experiments.The simulation design was implemented using the software of computer simulation technology(CST) for a 3-D microwave electromagnetic field.The simulation design shows that when the cylinder piston gets to the top dead centre(TDC),the electric field in the cylinder is stronger than elsewhere and the ignition is generated,with the electric field weakening and the ignition quickly snuffing out wit...