20100071656 | VALVETRAIN CONTROL STRATEGIES FOR EXHAUST AFTERTREATMENT DEVICES - A method may include operating an engine in a first valvetrain mode during a first engine operating condition, operating the engine in a second valvetrain mode different from the first valvetrain mode during a second engine operating condition, and controlling a temperature of an exhaust aftertreatment component in communication with an exhaust gas from the engine during the second engine operating condition based on the second valvetrain mode. | 03-25-2010 |