An exhaust system and process for operating the same

摘要

A process for operating an exhaust gas system (10, 100) comprises: producing an exhaust gas flow, introducing the exhaust gas flow to a system (10, 100) comprising a restricting device in fluid communication with an exhaust emission control device (18, 118, 230), and an exhaust conduit (14, 44, 114) comprising an exhaust throttle device (18, 118, 230), restricting the flow of the exhaust gas stream to the restricting device, and discharging the exhaust gas stream from the restricting device into the exhaust emission control device (18, 118, 230). The flow is sufficiently restricted such that the exhaust gas stream discharged into the exhaust emission control device has a temperature perform a desired function selected from the group consisting of regeneration and light-off.