Patent ID: 9416763
Filing Date: 2016-08-16
CPC Classification: F01N,F02P

Claim Text:
1. An after-treatment apparatus for exhaust gas in a combustion chamber of an internal combustion engine, comprising: a cylinder head having an intake port and an exhaust port; a cylinder block; a gasket installed between the cylinder head and the cylinder block; a spark-plug installed in the cylinder head and between the intake port and the exhaust port and configured to ignite an air-fuel mixture supplied to the combustion chamber; a discharge device installed in the gasket and having an electrode which has one end exposed at an inner peripheral edge of the gasket to the combustion chamber; an antenna installed in the gasket and having one end extending along the inner peripheral edge of the gasket and exposed to the combustion chamber; an electromagnetic wave generator connected to the antenna and configured to irradiate electromagnetic waves to an inside of the combustion chamber via the antenna; and a crankshaft angle detector that detects an angle of a crankshaft, wherein the after-treatment apparatus is configured to generate a discharge to ignite the air-fuel mixture by the spark-plug at a given timing based on the crankshaft angle detected by the crankshaft angle detector, thereby producing an exhaust gas in the combustion chamber, and further configured to generate another discharge from the electrode of the discharge device and irradiate the electromagnetic waves from the antenna in the combustion chamber for a given period of time, while the exhaust gas remains in the combustion chamber during an explosion stroke based on the crankshaft angle detected by the crankshaft angle detector.