Abstract: A method of controlling an exhaust gas aftertreatment system in a compression ignition engine having a power-assisted turbocharger coupled to a power source. The turbocharger includes a compressor in communication with an intake manifold and a turbine in communication with an exhaust manifold. The method comprises the steps of determining an operating mode of the exhaust gas aftertreatment system selected from the group consisting of a light off mode, regeneration mode, and storage mode. The method then determines a charge value associated with the power source, and engages the power source to the power-assisted turbocharger as a function of the charge value and the operating mode of the exhaust gas aftertreatment system. In one aspect of the invention, negative power is applied to the power-assisted turbocharger to increase the exhaust gas temperature to achieve particulate filter light-off.

Abstract: A method of controlling a vehicle is provided. The method includes controlling a continuously variable transmission and an engine with a supervisory controller and a powertrain controller; providing a driver input to the supervisory controller; controlling the supervisory controller to constrain the engine along a predetermined operating curve during a steady state condition of the driver input; and controlling the supervisory controller to relax the engine from the predetermined operating curve during a non-steady state condition of the driver input such that the powertrain controller coordinates an engine throttle and a rate of change of the continuously variable transmission ratio. Here, the predetermined operating curve is maintained by adjusting a continuously variable transmission ratio.