초록 ▼

An exhaust system for an internal combustion engine includes an exhaust turbocharger, and exhaust emission control with 3-way catalysts. In order to shorten the delay until emission control begins after the engine is started, a first catalytic converter is located in the exhaust line downstream from

An exhaust system for an internal combustion engine includes an exhaust turbocharger, and exhaust emission control with 3-way catalysts. In order to shorten the delay until emission control begins after the engine is started, a first catalytic converter is located in the exhaust line downstream from the turbocharger which is always traversed by the exhaust. Downstream of the turbocharger, a second catalytic converter is arranged that is traversed by exhaust only temporarily, with the second catalytic converter being traversed only until the exhaust system has reached a predetermined temperature.

대표청구항 ▼

[ What is claimed is:] [1.] An internal combustion engine arrangement comprising:a multi-cylinder engine having an exhaust outlet and an air inlet,an exhaust gas driven turbocharger disposed downstream of the exhaust outlet and having an exhaust gas driven turbine operable to charge air supplied to

[ What is claimed is:] [1.] An internal combustion engine arrangement comprising:a multi-cylinder engine having an exhaust outlet and an air inlet,an exhaust gas driven turbocharger disposed downstream of the exhaust outlet and having an exhaust gas driven turbine operable to charge air supplied to the air inlet,a main catalytic converter disposed downstream of the exhaust driven turbine,a starting catalytic converter disposed between the exhaust outlet and the exhaust driven turbine, andan exhaust gas flow control system selectively supplying exhaust gas to the exhaust driven turbine from the exhaust outlet through the starting catalytic converter during first engine operating conditions and in bypassing relation to the starting catalytic converter during second engine operating conditions, said first engine operating condition being engine starting.