Patent ID: 6311483
Filing Date: 2001-11-06
Classification: F01N,F02B,F02F,Y02T

Abstract:
An apparatus for feeding secondary air to exhaust gas in an engine, the engine including a cylinder head connected to a cylinder block such that a combustion chamber is formed between the cylinder head and a piston slidably fitted in a cylinder bore provided in the cylinder block, an exhaust port for discharging the exhaust gas from the combustion chamber is provided in the cylinder head, and a secondary air feed passage for feeding the secondary air to the exhaust gas flowing through the exhaust port is provided in the cylinder head, said apparatus for feeding secondary air to exhaust gas comprising:said secondary air passage including a first passage portion having a straight axial line with one end opened toward an inner surface of the exhaust port, said one end being directed toward a downstream side of the exhaust gas in the exhaust port, and a second passage portion continuous with said first passage portion having a straight axial line extending parallel to an axial line of said cylinder bore; anda reed valve connected to said secondary air feed passage is mountable to an outer surface of the cylinder block positioned opposite the exhaust port.