Gm Global Technolgoy Operations, Inc.

Joseph Shelton

Vijay A Ramappan

Jeffrey M Kaiser

Rafat F Hattar

Chengke Liu

An engine consumes fuel and air to generate an exhaust gas stream. An exhaust system channels the exhaust gas stream from the engine to a tailpipe. An aftertreatment system is included in the exhaust system and includes a catalyst. An exhaust throttle valve is disposed in the exhaust system downstream from the aftertreatment system. An actuator controls an amount of air pumped through the engine. A controller operates the exhaust throttle valve and/or the actuator to control emissions from the exhaust system during a cold start and following a deceleration fuel cutoff event.

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Fenton, MI, United States of America

Joseph Shelton