Patent ID: 6708485
Filing Date: 2004-03-23
Classification: F01N,Y02T

Abstract:
An exhaust system used for a motor vehicle and extending between an exhaust-generating internal combustion engine and an exhaust pipe for release of exhaust into the surrounding environment, said exhaust system, comprising:a three-way catalytic converter disposed in proximity of the combustion engine; a NOx-adsorber disposed upstream of the exhaust pipe; an exhaust line extending between the catalytic converter and the NOx-adsorber for conducting exhaust, said exhaust line including an inner tube, an outer tube in spaced-apart surrounding relationship to the inner tube to define a space therebetween, and a separation tube disposed in the space between the inner tube and the outer tube, to thereby define between the inner tube and the separation tube an inner annular gap for conducting exhaust, and between the outer tube and the separation tube an outer annular gap for conducting a coolant; and a shut-off device for regulating a flow of exhaust through the inner tube, wherein the inner tube has an engine-distal end constructed for providing mobility of the inner tube.